Published in last 1 year | In last 2 years | In last 3 years | All
 Select Treatment ideas and technical measures of black and stinky water bodies ZHU Yunjie,LI Guowen,ZHANG Lieyu,XU Qiujin,SONG Yonghui Journal of Environmental Engineering Technology    2018, 8 (5): 495-501.   doi: 10.3969/j.issn.1674-991X.2018.05.065 Abstract （989）   HTML （12）    PDF（pc） （893KB）（295）       In China the blackening and stinking of urban waters is a common phenomenon. At present, large-scale governance of black and stinky (BS) water bodies is underway. The seriousness of the problem of BS water bodies in China was briefly introduced, and the current national policy and governance objectives for the treatment of BS water bodies elaborated. The concept of BS water bodies was analyzed, and the idea for their treatment was put forward. The treatment technical route was clarified, including the investigation and diagnosis of problems, the verification of pollutant loads, and the determination of treatment targets of BS water bodies. Formulation of applicable technologies and governance programs, and forecasting of governance effects were also involved. On these bases, the main technical measures for the treatment of BS water bodies were proposed, including pollution source control, hydraulic regulation and ecological restoration, and meanwhile, it was noted that comprehensive management must be strengthened. The progress and of governance cases of BS water bodies at home and abroad were reviewed, and the governance process and existing problems were analyzed. Finally, the suggestions for the treatment of BS water bodies were proposed from four aspects, i.e. the evaluation indicators, the technical systems, the management mechanisms, and the publicity and education.
 Select The cause for abnormal water quality deterioration of Waihai of Dianchi Lake in 2017 and the countermeasures ZHENG Binghui,PENG Jiayu,HU Xiaozhen,CHU Zhaosheng,PANG Yan,WANG Lijing,XU Xiaomei,HE Jia Journal of Environmental Engineering Technology    2018, 8 (5): 465-472.   doi: 10.3969/j.issn.1674-991X.2018.05.061 Abstract （482）   HTML （11）    PDF（pc） （4592KB）（416）       The water quality of Waihai of Dianchi Lake abnormally deteriorated from Ⅴclass to worse than Ⅴclass (Environmental Quality Standards for Surface Water (GB 3838-2002) ) in 2017. Particularly, the concentration of water quality indicators, TP, TN, CODCr and Chla, abnormally rose during June to August. The roots causing the water quality deterioration are as following: compared with the same period of the last year, the precipitation increased by 81% during June to August in 2017, and it is the highest since 1999. Because of the abnormal precipitation, the pollution loads of TN, TP carried by Baoxiang River, Panlong River and Jinzhi River which are the main inflows of Waihai increased by 50% and 59%, respectively, directly leading to the water deterioration of the north of Waihai. In addition, the combined sewage interception system was overflow during the rainstorm, leading to the low collection rate of waste water treatment plants (WWTPs). Compared with the dry season, the average influent concentration of CODCr, TN, TP of the WWTPs of No.2, No.3, No.4 and No.9 decreased by 15%, 15% and 20% in rainy season, and the average influent concentration of CODCr, TN, TP of the WWTPs of No.10 decreased by 16%,19% and 8%, respectively. Meanwhile, compared with the year of 2016, the water supply by Niulanjiang water transfer project decreased by 50%, the concentration of NH3-N, TP, TN increased by 75.2%, 51.1%, 40.2%, and therefore the effect of water quality improvement was reduced. Four strategies to improve the water quality of Waihai of Dianchi Lake were proposed, including improving the sewage collection system and enhancing the efficiency of wastewater collection by advancing the check of pollution interception system; improving the regulation of the combined sewage by optimizing the operation of the built storage pools; improving the purifying rate of sewage treatment plant by optimizing operation, enhancing supervision and joint operation in rainy season; improving the environment efficiency of water supplement project by enhancing the protection and governance of water source area of Niulanjiang River.
 Select Nutritional characteristics and aquatic ecosystem health assessment in cascade reservoirs of Wuxijiang ZHANG Xiaolin,ZHANG Jingtian,CHI Chunjuan,MA Chunzi,LI Xiaochuang,XIAO Zhe,AN Zhenzhen Journal of Environmental Engineering Technology    2018, 8 (5): 502-509.   doi: 10.3969/j.issn.1674-991X.2018.05.066 Abstract （410）   HTML （0）    PDF（pc） （1042KB）（290）       Extensive cascading hydropower dam exploitation may profoundly affect the river ecosystem health. The nutritional characteristics and community structure of phytoplankton in upstream Hunanzhen reservoir and downstream Huangtankou reservoir in Wuxijiang cascade reservoirs from June 2017 to November 2017 were investigated, and the assessment of the reservoir aquatic ecosystem health was performed by Index of Biological Integrity (IBI) method. The results indicated that nitrogen, phosphorus and organic matter contents of Wuxijiang cascade reservoirs were low, the nutritional level was poor. The 152 taxa of phytoplankton belonging to 8 phyla were identified, the densities of cyanobacteria and chlorophyte were high, and the phytoplankton density in downstream Huangtankou reservoir was lower than that in upstream Hunanzhen reservoir. The IBI assessment result showed that Wuxijiang cascade reservoirs were in relatively high biological integrity, and at normal to sub-health level. The IBI index was significantly affected by the water temperature, suggesting that the good health level was found in Huangtankou reservoir with low water temperature, but in Hunanzhen reservoir with high water temperature.
 Select Buffer type identification and water quality status of inflow rivers under different buffer patterns in Lake Erhai WAN Zhengfen,LU Shaoyong*,JIN Xiangcan,BI Bin,JIN Xiangcan,CHEN Fangxin,QIN Pan,LI Linlin Journal of Environmental Engineering Technology    2018, 8 (5): 475-480.   doi: 10.3969/j.issn.1674-991X.2018.05.062 Abstract （389）   HTML （5）    PDF（pc） （1655KB）（250）       Focusing on the buffer zones of Lake Erhai, and using combined methods of on-site investigation, spatial analysis and data survey, the buffer types of Lake Erhai were identified and the water quality of the inflow rivers under different buffer patterns were analyzed. The results indicated that the buffer structure of Lake Erhai is unreasonable, with excessive proportion of farmland-type and village-type buffer zones. In addition, both the area and shoreline of the village buffer patterns close to the inner parts accounted for over 60% of the buffer zones of Lake Erhai, which mainly located in the western part of the lake. The water quality of main inflow rivers was generally poor, being Class Ⅳ and inferior Ⅴ. The buffer zones of the Tao stream and the Luoshi River were typical “outer cycle-village-farmland-village-inner circle” and “outer cycle-farmland-village-farmland-inner circle” respectively, with inferior Ⅴ class of surface water quality, mainly affected by non-point source pollution such as agricultural non-point sources, residential sources, and tourism pollution. In Lake Erhai buffer zones, the village-type buffers have a large number of external pollution load inputs, while the non-point sources from farmland-type buffers with high fertilization rates and highly polluted decentralized livestock and poultry have direct impacts on the river water quality. Therefore, the area of village-type and farmland-type buffer zones nearby Lake Erhai should be strictly controlled and non-point source pollution from village residential sources, farmland sources and tourism sources should be reduced.
 Select Application of data assimilation method in updating emission inventory WANG Jikang, ZHANG Hengde, ZHANG Bihui, YANG Xiaolu Journal of Environmental Engineering Technology    2018, 8 (6): 577-585.   doi: 10.3969/j.issn.1674-991X.2018.06.077 Abstract （364）   HTML （43）    PDF（pc） （931KB）（173）       Data assimilation is to use the observed data to update the pollution sources from top to bottom, which could provide a fast way to update and verify the emission inventories, and also add further information about the temporal variation and some sources that could not easily be quantified by traditional bottom-up methods. The basic principles of several assimilation inversion methods, including the mass balance ,ensemble Calman filter and four-dimensional variation methods were reviewed, and their application methods in emission inventory inversion and optimization introduced. The acquisition method of observation data and the primary emission inventory, the calculation method of uncertainty, and the acquisition method of the relationship between pollution sources and observation data were also introduced. The application of pollution source assimilation inversion methods at different scales of pollution source inventory inversion, both at home and abroad, were summarized. The ensemble Kalman filter or the 4D variation method combined with adjoint model or decoupling direct method was used to determine the relationship between pollution sources and observation data, able to avoid the nonlinearities in the model to a certain extent. The more accurate observations and more precise air quality model were needed in the future to improve the effect of pollution sources inversion.
 Select Changed weight trophic level index method and its application to Longhe tributary of the Three Gorges reservoir area HAN Xuemei, FU Guo, LIU Qingqing, ZHANG Shen, ZHAO Jian Journal of Environmental Engineering Technology    2018, 8 (6): 627-634.   doi: 10.3969/j.issn.1674-991X.2018.06.083 Abstract （349）   HTML （4）    PDF（pc） （969KB）（172）       Aiming at the deviation problem existing in the evaluation method of weighted average comprehensive nutritional status index TLI(Σ), when making by averaging the values of five evaluation indexes, including Chla, TP ,TN, SD and CODMn. The expressing efficacy of nutrient levels of different evaluation indicators under different lake conditions (nitrogen limitation, phosphorus limitation, nitrogen-phosphorus synergistic effect) was analyzed. The three indicators of Chla, TP and TN were selected as evaluation indicators, and the changed weight trophic level index (TLICW) evaluation method for comprehensive nutritional status index was obtained by comparing the apparent and potential nutritional status indexes. The method was applied in the Longhe River, a tributary of the Three Gorges Reservoir area. It showed that the TLICW method with variable weights was more prominent in describing the characteristics of nutritional status than the TLI(Σ) method. It was in the status of light eutrophication evaluated by TLICW method while in the status of mesotrophication by TLI(Σ) method. The TLICW mean value determined by the multi-lake response relationship reveals that Longhe River was one trohpic level higher than determined by the Longhe River response relationship. The eutrophication thresholds of the TP and TN determined by the Longhe River response relationship was of 2.75 and 3.00 times respectively of multi-lake response relationship, indicating that there was a clear over-protection problem when the multi-lake response relationship was used in the eutrophication evaluation of Longhe River.
 Select Nitrogen removal of simulated low-polluted water of Lake Erhai buffer zone by surface-flow wetland ZHANG Junpeng,LU Yifeng,GUO Xiaochun,LU Shaoyong,WU Xin Journal of Environmental Engineering Technology    2018, 8 (5): 488-494.   doi: 10.3969/j.issn.1674-991X.2018.05.064 Abstract （348）   HTML （1）    PDF（pc） （1882KB）（331）       Aiming at the pollution problem of typical low-polluted water (produced by agricultural non-point sources) in Lake Erhai buffer zone, the typical buffer zone mostly occupied by farmland between Baihe Stream and Mei Stream in the western Lake Erhai basin were selected to monitor the surface runoff quality of the buffer zone, and to set up the surface flow pilot wetland for field study. The nitrogen removal effect for simulated low-polluted water of Lake Erhai buffer zone from September 2016 to August 2017 was studied. The results indicate that the pilot system has a high nitrogen removal effect, with annual average removal rate of total nitrogen as Nymphoides peltatum wetland (83.1%) >reed wetland (73.9%) >Hydrilla verticillata wetland (73.3%) >blank wetland (65.5%). The average annual removal rate of ammonia nitrogen was higher than 77%. Among different plant systems, Nymphoides peltatum system has the best removal effect of total nitrogen and the most stable removal rate. The removal rate and width of each system were simulated, and it reveals that the optimum width of the Nymphoides peltatum, Hydrilla verticillata and Phragmites communis wetland systems was respectively 7.04 m, 8.64 m and 6.92 m while the effluent water quality is of class Ⅲ water. The contribution rate of nitrogen removal in Nymphoides peltatum, Hydrilla verticillata and Phragmites communis wetland systems during the test is 5.88%, 3.23% and 21.12%, respectively. The total nitrogen content of reeds in wetlands is significantly higher than that of Nymphoides peltatum and Hydrilla verticillata. The contribution rate of Phragmites communis and Hydrilla verticillata to nitrogen removal in wetland shows a large seasonal difference, while the contribution rate of Nymphoides peltatum in wetland to nitrogen removal in different seasons varies little.
 Select Study of multi-dimensional water quality safety evaluation method: taking Taihu Lake as an example ZHAO Yanmin, CAO Wei, ZHANG Lei, MA Yingqun, QIN Yanwen, LIU Zhichao, YANG Chenchen Journal of Environmental Engineering Technology    2018, 8 (6): 595-601.   doi: 10.3969/j.issn.1674-991X.2018.06.079 Abstract （340）   HTML （6）    PDF（pc） （950KB）（233）       Based on the characteristics of water pollution of Taihu Lake, the indicators including water quality, eutrophication, water bloom occurrence and health risk were screened, and a multi-dimensional water quality safety evaluation index system consisting of 4 secondary indicators and 21 tertiary indicators was constructed. Analytic Hierarchy Process (AHP) method was applied to determine the weight of the indicators. The survey data of Taihu Lake in 2012 was used to evaluate the water quality safety grade with the water quality safety index. The results showed that the overall water quality safety of Taihu Lake was only qualified in 2012. The water quality safety grade in the eastern district of lake was medium, while the water quality safety grades in other districts of the lake were qualified. The water quality safety status of Zhushan Lake and Northwest District was the worst, and the water quality safety index was 50.78 and 52.45, respectively. Based on the analysis of the assessment results, eutrophication level and water bloom condition were found to be the main factors affecting the water quality safety of Taihu Lake.
 Select The application of hedonic tone in odour pollution sensory evaluation ZHAI Zengxiu,LI Weifang,ZOU Kehua,YANG Weihua Journal of Environmental Engineering Technology    2018, 8 (5): 546-550.   doi: 10.3969/j.issn.1674-991X.2018.05.072 Abstract （331）   HTML （1）    PDF（pc） （853KB）（337）       In order to enrich the sensory evaluation indicators of odour pollution in China, a 9-point hedonic tone method was used to determine the hedonic tone of samples at different odour concentrations from three typical odour emission sources including rubber products, bakery and landfill. A comprehensive evaluation model of odour pollution and hedonic tone was put forward by analyzing the relationship between odour concentration (odour index) and hedonic tone, that is, the annoyance potential of source = odour index × hedonic tone. The results showed that the hedonic tone of rubber products and landfill sites was negative value, while that of food processing was positive value. The relationships between the odour concentration and hedonic tone from the three kinds of emission sources are in line with the quadratic polynomial model. In addition, the correlation coefficients all reached above 0.99. The annoyance potential calculation results showed that the annoyance potential of rubber products and the landfill was -200.91 and -144.80 respectively, and that of food processing was 79.66. Applying this method, the different odour sources could be distinguished more intuitively, especially for the sources that have similar odour concentrations and different odours. Then the key emission sources and key emission units could be accurately identified. The research indicated that hedonic tone reflects the psychological impact of odour on people and its harmful degree more accurately, and it is necessary to apply hedonic tone to odour pollution sensory evaluation.
 Select Purification effect and stability of water quality of different functional units in Laoyuhe Wetland Park of Dianchi Lake SONG Xueyan,MA Lan,ZHAO Haixi,TU Qi,LU Yifeng,LU Shaoyong Journal of Environmental Engineering Technology    2019, 9 (2): 167-174.   doi: 10.12153/j.issn.1674-991X.2019.01.030 Abstract （323）   HTML （13）    PDF（pc） （3017KB）（38）       Taking Laoyuhe Wetland Park (WPlyh) in Dianchi Lake as the research object, sampling points were set up in different functional units of the wetland to analyze the removal effects of CODCr, N $H 4 +$ -N and TP by different functional units in the testing operating period from April 15 th, 2015 to May 14 th, 2015. Sampling points were also set up at the inlet and outlet of wetlands and the long term operation effects in the period from April, 2015 to March, 2017 were monitored and analyzed. It revealed that during the WPlyh test run, the CODCr, N $H 4 +$ -N and TP concentrations in the outlet were significantly lower than those in the inlet, with the removal rates of 40.07%, 48.48% and 40.38%, respectively, while the treatment effect was still unstable. Among the functional units, the surface flow wetland at the entrance of the lake had the best removal effect on CODCr with removal rate of 10.36%, the front part of the inter-forest shallow-water wetland had the best removal effect on N $H 4 +$ -N with the removal rate of 17.59%, and the back part of the inter-forest shallow-water wetland had the best removal effect on TP with the removal rate of 9.44%. It means that the decontamination rate of the inter-forest shallow-water wetland accounted for 53.15% of WPlyh total decontamination rate, which could be regarded as the best purification unit in the wetland parks. WPlyh's monthly reductions and removal rates for CODCr, N $H 4 +$ -N, and TP during long term operation and the removal rates of the three characteristic pollutants showed a downward trend with time. Especially after one year of operation, the downward trend was most obvious.
 Select Effects of inflow modes on sewage nitrogen removal by ecological gravel beds WU Xin,HE Shuzhuang,LU Yifeng,LU Shaoyong,ZHANG Junpeng,HU Tao,ZHANG Senlin,CHEN Fangxin Journal of Environmental Engineering Technology    2018, 8 (5): 481-487.   doi: 10.3969/j.issn.1674-991X.2018.05.063 Abstract （315）   HTML （1）    PDF（pc） （1176KB）（237）       In order to improve the nitrogen removal rate of residential sewage by ecological gravel beds, four kinds of constructed ecological gravel bed were designed, including Schoenoplectus tabernaemontani bed, Phragmites australis bed, Typha orientalis bed and blank bed without vegetation. The effects of two inflow modes, i.e. continuous inflow and intermittent inflow, on the removal of TN, N$H4+$-N, and N$O3-$-N were studied. The hydraulic load (HL) was 7.5 cm∕d and the hydraulic retention time (HRT) was 1.8 d under the continuous inflow, while the HL was 7.5 cm∕d and the HRT was 5.4 d under the intermittent inflow. The results show that there exists great difference of the nitrogen removal efficiency between two inflow modes for different ecological gravel beds. The removal rates of TN and ammonia nitrogen under continuous inflow were in the order of Typha orientalis bed> Schoenoplectus tabernaemontani bed > blank bed > Phragmites australis bed, with the highest removal rates by Typha orientalis bed, which removal rate of TN and ammonia nitrogen were 77.68% and 81.33%, respectively; the removal rates of nitrate nitrogen were in the order of blank bed>Phragmites australis bed>Tyha orientalis bed>Schoenoplectus tabernaemontani bed, with thee highest removal rates by blank bed, which removal rate of nitrate nitrogen was 65.29%. The removal rates of TN and ammonia nitrogen under intermittent inflow were in the order of Schoenoplectus tabernaemontani bed > Phragmites australis bed > Typha orientalis bed> blank bed, and the effect of Schoenoplectus tabernaemontani bed was the best, which removal rate of TN and ammonia nitrogen were 89.54% and 91.79%, respectively; the removal rates of nitrate nitrogen were in the order of Schoenoplectus tabernaemontani bed>Typha orientalis bed>blank bed>Phragmites australis bed, the Schoenoplectus tabernaemontanid bed was the best with a removal rate of 46.43%. The removal efficiency of ammonia nitrogen and TN were better improved by intermittent inflow in plant systems. The removal rate of TN and ammonia nitrogen increased by 19.63% and 14.76% in Phragmites australis bed, and the removal rate of TN and ammonia nitrogen increased by 19.14% and 18.60% in Schoenoplectus tabernaemontani bed, respectively.
 Select Characterization of VOCs emission in automotive industrial park in Chongqing FAN Li,LI Peng,LI Wensheng,ZHAO Jing,LIANG Jian,SONG Dan Journal of Environmental Engineering Technology    2018, 8 (5): 571-576.   doi: 10.3969/j.issn.1674-991X.2018.05.076 Abstract （299）   HTML （4）    PDF（pc） （1731KB）（314）       The emission concentrations, amounts and composition characteristics of volatile organic compounds (VOCs) were investigated from 13 key factories in an automotive industrial park in Chongqing, based on the local standards, i.e. Emission Standrds of Air Pollutants for Surface Coating of Automobile Manuaturing Industry and Emission Standrds of Air Pollutants for Surface Coating of Motocycle and Auto Parts Manuaturing Industry. The results showed that the VOCs concentration of various emission links of the industrial park ranged at 0-243.00 mg∕m 3, with the largest concentration of production being concentrated on the surface coating process. The maximum instantaneous VOCs emission was 141.146 kg∕h, and the VOC emisson from auto parts factories containing surface coating process accounted for 66% of the total emission of the industrial park. The main VOCs matters detected were n-butyl acetate(37%), xylene(30%) and ethylbenzene(18%), and the VOCs species varied with different factories, considerably due to their differences in diluents. Finally, it was proposed that the surface coating of auto parts factories should be the main focus of the environment management in the industrial park.
 Select Study on variation characteristics and estimation model of PM2.5 concentration in Beijing in winter XIONG Junli,LI Caiyan Journal of Environmental Engineering Technology    2018, 8 (5): 533-538.   doi: 10.3969/j.issn.1674-991X.2018.05.070 Abstract （295）   HTML （4）    PDF（pc） （806KB）（331）       Based on the hourly air quality monitoring data in Beijing in January 2017, the hourly and regional changes of the concentration of PM2.5 in Beijing were discussed, and the estimation models of PM2.5, PM10 and major gaseous pollutants of 12 sites were constructed by multiple stepwise regression. The results showed that the hourly concentration change trend of PM2.5 concentration in Beijing was high at night (18:00-07:00) and low in the daytime (08:00-17:00), the monthly averaged PM2.5 concentrations of 3 sites in Huairou Town, Changping Town and Dingling were relatively low (78-94 μg∕m 3), while that of other sites were between 106-128 μg∕m 3. The correlation between PM10, 4 kinds of gaseous pollutants and PM2.5 was in the order of PM10>CO>NO2>O3>SO2. The adjustment coefficient $R adj 2$ of the PM2.5 concentration estimation model of the 12 sites was all more than 0.96, and the standard error SE was between 13.6-24.5. It is more effective to estimate the PM2.5 concentration of the site by using the estimation model of the site itself, and the effect of estimating the PM2.5 concentration was poorer by using the data of other sites.
 Select Research on removal of Taihu Lake algal source DON by KMnO4 pre-oxidation and coagulation sedimentation ZHANG Qian,LIU Xiaodong,DENG Feifan* Journal of Environmental Engineering Technology    2018, 8 (5): 527-532.   doi: 10.3969/j.issn.1674-991X.2018.05.069 Abstract （275）   HTML （0）    PDF（pc） （1136KB）（201）       The removal efficiency of dissolved organic nitrogen (DON) in the algae-laden water using KMnO4 pre-oxidation and enhanced coagulation sedimentation was studied by experiment. The mechanism was analyzed using molecular weight distribution measuring method and two-dimensional electrophoresis method. The results showed that the optimal working condition happened when KMnO4 dosage was 1.00 mg∕L, the pre-oxidation time were controlled in 30 min, and the PAC dosage was 20 mg∕L, then the DON removal rates reached 36.0%, the turbidity and algae removal rates reached 88.3% and 93.0%. KMnO4 pre-oxidation enhanced coagulation sedimentation can be used as an emergency treatment option for the removal of DON when the source water algae bloom.
 Select Study on ammonia emission of sewage treatment process of a pharmaceutical enterprise in Shijiazhuang LIU Cuimian,DOU Hong,JIANG Jianbiao,GAO Yuan,CHANG Qing Journal of Environmental Engineering Technology    2018, 8 (5): 551-555.   doi: 10.3969/j.issn.1674-991X.2018.05.073 Abstract （274）   HTML （0）    PDF（pc） （785KB）（150）       In order to study on ammonia emission characteristics of sewage treatment process of a pharmaceutical enterprise, waste gas samples were collected from several wastewater treatment units and waste gas discharge outlet in sewage treatment progress of pharmaceutical industry to analyze NH3 emission characteristics. The study results showed that:the maximum NH3 emission appeared at hydrolysis acidification unite, the point concentration reached 62.89 mg∕m 3,emission reached 3 360 mg∕m 3 for each treatment of 1 m 3 sewage, The sewage treatment process of each unit of ammonia amount was 0.97 kg∕h, the conversion for each treatment 1 m 3wastewater, ammonia production 9 312 mg∕m 3, after the treatment of waste gas discharged into the environment ammonia was 0.25 kg∕h, emission reached 2 400 mg∕m 3 for each treatment of 1 m 3 sewage, ammonia removal rate was 74.2%, the emission of ammonia gas was obviously reduced after the treatment of exhaust gas. Waste gas treatment in the southern and northern areas adopts the technology of caustic wash+oxidation+washing. The removal rate of ammonia was 93.3% and 83.1%, The ammonia removal rate of the waste gas treatment facility in the biological zone is 39.1%. Caustic wash+oxidation+washing has better effect than biotrickling filter in the removal the ammonia.
 Select Study on online monitoring and early warning indicator system of pollution sources in chemical industry CAO Wei, QIN Yanwen, ZHANG Lei, ZHAO Yanmin, MA Yingqun, YANG Chenchen Journal of Environmental Engineering Technology    2018, 8 (6): 635-641.   doi: 10.3969/j.issn.1674-991X.2018.06.084 Abstract （274）   HTML （3）    PDF（pc） （848KB）（84）       The accident warning indicators were optimized by the analytic hierarchy process. By calculating and comparing the weights of each indicator, the heavier indicator was selected to form the water pollution accident warning indicator system. On the basis of this, the framework of the pollution sources online monitoring and early warning indicator system was initially constructed in the light of the general production and pollutant discharge situations of the industrial enterprises. Taking the delayed coking process of one enterprise as an example, the above method was applied to analyze the environmental pollution that may occur in the production process, calculate the weights of each indicator using the analytic hierarchy process, and determine the construction process of the early warning indicator system. The indicators that need to be monitored online were finally determined for the delayed coking devices, including CODCr, petroleum hydrocarbon, ammonia nitrogen, sulfides and phenols.
 Select EKC test and decoupling analysis of carbon emissions in countries along the “One Belt and One Road” WU Na,FU Zeqiang,WANG Yanhua,HE Chuan,FENG Qiang Journal of Environmental Engineering Technology    2018, 8 (6): 671-678.   doi: 10.3969/j.issn.1674-991X.2018.06.089 Abstract （272）   HTML （4）    PDF（pc） （2729KB）（233）       “One Belt and One Road”(OBOR) is a significant initiative proposed by China that shall promote the sustainable development in the countries of the region. One static panel model of Environment Kuznets Curve with cubic term was constructed, and the data of per capita energy consumption, per capita carbon dioxide emissions and real GDP per capita in 2006, 2009, and 2014 in OBOR countries were used to perform EKC test. The results of EKC test showed that the countries were in the phase of the per capita energy consumption decreasing with the increase of per capita GDP and while per capita carbon emissions increasing with the increase of per capita GDP. Meanwhile, the decoupling of per capita carbon dioxide emissions and economic growth in OBOR countries was analyzed. It showed that a transformation from negative dcoupling to decoupling had been experienced in OBOR countries overall. Besides, the current average level of the countries is at the weak decoupling phase. Some solutions such as optimizing structure of energy consumption, strengthening in-depth cooperation on environmental protection and advancing energy-saving and environmental protection industries were presented, to promote the environmental friendly and low-carbon and sustainable development in OBOR countries.
 Select Progress in catalytic oxidation of elemental mercury by modified SCR catalysts QIN Yadi,WANG Shujuan,ZHUO Yuqun Journal of Environmental Engineering Technology    2018, 8 (5): 539-545.   doi: 10.3969/j.issn.1674-991X.2018.05.071 Abstract （272）   HTML （0）    PDF（pc） （811KB）（258）       Targeting the oxidation of elemental mercury (Hg 0) in the flue gas from coal-fired power plant, the research progress of the catalytic oxidation by modified selected catalytic reduction (SCR) catalysts for elemental mercury was reviewed, focusing on the influence of metal oxides or chlorides doped SCR catalysts on elemental mercury oxidation. The activity of modified SCR catalysts for elemental mercury was explored from the effects of dopant, doping ratio, flue gas components and temperature. In addition, the heterogeneous reaction mechanisms between elemental mercury and the modified SCR catalysts were analyzed synthetically with respects to doping elements and flue gas conditions. Finally, considering the current situation of coal-fired plants, the prospects of future studies on modified SCR catalyst and the relevant experimental methods were proposed.
 Select Measurement and analysis of influence effect of high-tech industry development on industrial pollution based on PLS method ZHANG Leqin,CHEN Suping Journal of Environmental Engineering Technology    2018, 8 (5): 563-570.   doi: 10.3969/j.issn.1674-991X.2018.05.075 Abstract （272）   HTML （1）    PDF（pc） （886KB）（216）       Taking Anhui Province as an example, the entropy weighting method was used to evaluate the industrial pollution situation. Based on STIRPAT model, the typical correlation and partial least squares regression analysis methods were adopted to investigate the influence effect of industrial pollution caused by high-tech industry. The results showed that firstly, the pollution index decreased from 0.537 1 in 2005 to 0.469 3 in 2015 with annual average reduction of 1.34%. Secondly, the driving factors of industrial pollution include high-tech industry development, economic growth, fixed asset investments, urbanization, per capital household consumption level, direct foreign investment, environmental regulation policies, industrial structure and marketization degree. Thirdly, the high-tech industry development, economic growth, urbanization level, per capital household consumption level and the interaction terms of economic development and high-tech industry development make significant inhibitory effects on industrial pollution; with their increase rate of 1%, the industrial pollution index is caused to decrease by 0.087 8%, 0.047 0%, 0.000 9%, 0.027 6% and 0.259 8% respectively. Fourthly, the fixed asset investments, industrial structure, direct foreign investment, marketization degree and environmental regulation have positive driving effects on industrial pollution; when increasing by 1%, the industrial pollution index increases by 0.036 6%, 0.000 2%, 0.271 8%, 0.008 1% and 0.031 8% respectively.
 Select Optimization and application of accurate control of ultra-supercritical boiler and SCR parameters for NOx real time value up to the standard ZHANG Guangcai,LI Ruipan,ZHU Xuezhi,TAO Ran Journal of Environmental Engineering Technology    2018, 8 (6): 586-592.   doi: 10.3969/j.issn.1674-991X.2018.06.078 Abstract （270）   HTML （14）    PDF（pc） （895KB）（100）       The current environmental policy requires that the NOx emission of power station boilers is qualified by the control hourly average, while the real time value of emissions is not required. In order to further reduce NOx emissions from power station boilers, improve operation stability and maximize the potential of SCR system, the study and optimization of the influence factors on NOx generation and removal of power station boilers was carried out. Thereby the real time values of NOx emission were all up to standard, and the boiler efficiency improved. The phenomenon of short-term over standard was avoided in the changing condition of the boiler load adjustment. It achieved good results in the safety, stability and economy of the system, and greatly reduced the workload of daily operation adjustment.
 Select Pollution characteristics and ecological risk assessment of heavy metals in Baiyangdian Lake GAO Qiusheng,TIAN Ziqiang,JIAO Lixin,DING Lin,YANG Suwen,HAO Zifeng,CUI Zhidan,JIA Haibin Journal of Environmental Engineering Technology    2019, 9 (1): 66-75.   doi: 10.3969/j.issn.1674-991X.2019.01.010 Abstract （268）   HTML （12）    PDF（pc） （2661KB）（49）       In order to survey the present heavy metals pollution of the main surface water in Xiongan New Area-Baiyangdian, 15 points were set up to study the distribution characteristics of heavy metals concentrations in surface water and sediment of Baiyangdian Lake, and the pollution degree of surface water and sediment of the lake was assessed by the methods of comprehensive pollution index, index of geo-accumulation and potential ecological risk index. The changes of heavy metal concentration and potential ecological risk index from 2004 to 2016 were also analyzed. The results showed that the concentrations of heavy metals Cr, Ni, Cu, Zn, As, Cd and Pb in water were 2.38, 6.56, 5.57, 67.17, 4.13, 0.034, 0.39 μg/L, respectively. Among them, Cu and Zn at the Shaochedian site, and Zn at Zhainan, Luowangdian, Quantou, Zaolinzhuang, Guangdianzhangzhuang, Guolikou and Anxin Bridge sites exceeded Class Ⅰ of Surface Water Environmental Quality Standard (GB 3838-2002). Other sites were better than Class Ⅰ water quality standards, Cr, As, Cd and Pb were better than Class Ⅰ water quality standards in all points. The concentrations of heavy metals Cr, Ni, Cu, Zn, As, Cd and Pb in sediment were 48.53, 25.51, 28.83, 91.19, 161.51, 3.21, 45.26 mg/kg, respectively. Cr and Ni were better than Class Ⅰ of Soil Environmental Quality Standard (GB 15618-1995) in all points, while Cu, Zn and Pb were better than Class Ⅱ standards in all points. As and Cd were both significantly higher than Class Ⅲ standards in all points. The comprehensive pollution index showed that there was no heavy metals pollution in Baiyangdian surface water, while the accumulation index and potential ecological risk index indicated that Cd pollution in Baiyangdian sediments was extremely serious and As was also seriously polluted, which should be paid enough attention to. The concentrations of As, Cd and Pb significantly increased from 2003 to 2014, and Cd contributed more than 83% to the historical heavy metal potential ecological risk index, especially, being the main pollution factor. Therefore, the control of Cd pollution into the lake and sediment should be strengthened.
 Select Heavy metal pollution and ecological risk assessment of arable land soil in Haigou small watershed JU Tienan,WU Xiao,SHI Huading,GAO Fengjie,LI Xinzhe,WANG Yuyao,LUAN Tian,FAN Ping Journal of Environmental Engineering Technology    2018, 8 (5): 556-562.   doi: 10.3969/j.issn.1674-991X.2018.05.074 Abstract （264）   HTML （1）    PDF（pc） （2346KB）（230）       In order to understand the current situation of heavy metal pollution in the arable land of the Haigou small watershed, 106 samples of the surface soil of the arable land were collected in the small watershed, and the inverse distance weighting interpolation method and the Hakanson potential ecological risk index method were used to analyze the distribution of Cd, Pb, Hg, Cu and As in the arable land, in combination with the RS image interpretation and the ArcGIS land statistics method. The results showed that the average contents of heavy metals Cd, Pb, Hg, Cu and As were 0.307, 23.422, 0.041, 21.544 and 12.235 mg∕kg respectively, which were all higher than the background values of Heilongjiang Province. Compared with Soil Environmental Quality Standard (GB 15618-1995), the content of Cd exceeds Class Ⅱ standard, and that of other heavy metals meets Class Ⅰ standard. In terms of the spatial distribution of heavy metals, it was found that the change of As content gradually decreased from east to west, and the change of Cd content was opposite to that of As, which gradually decreased from east to west. The potential ecological risk of the arable land was evaluated by the Hakanson potential ecological risk index method. The results showed that the ecological risk grades of Cd and Hg in the arable land of the Haigou small watershed were relatively high and medium, while that of Pb, Cu and As were mild. Therefore, the potential ecological risk of the farmland in the Haigou small watershed was generally in the middle.
 Select Exploration on planning of ecological civilization construction:a case study of Wencheng County in Zhejiang Province HAN Lu,LI Mingyue,YAN Xiaohan,BAO Zhuxiang,DUAN Liang Journal of Environmental Engineering Technology    2019, 9 (1): 53-60.   doi: 10.3969/j.issn.1674-991X.2019.01.008 Abstract （246）   HTML （10）    PDF（pc） （14299KB）（24）       In the construction of ecological civilization in China, the basic background and the socioeconomic development level of different regions are obviously different, so it is impossible to copy a model. Precise analysis of the construction of regional ecological civilization is an inevitable choice for the compilation of ecological civilization planning. A general framework for the compilation of ecological civilization planning program suitable for local characteristics were put forward. Taking Wencheng County as an example, and focusing on its natural resources and ecological environment advantages, the restrictive indicators of spatial pattern, industrial development, environmental quality and livable life in the construction of ecological civilization in the county were analyzed. An index system for the planning of ecological civilization construction in Wencheng County was set up according to related national requirements. Aiming at the restrictive indicators, a series of tasks and measures were put forward, such as optimizing ecological spatial patterns, accelerating the development of eco-industry, improving the quality of ecological environment, and strengthening system, culture and life construction. Finally, the expected implementation benefits and achievability of planning objectives were analyzed.
 Select Phosphorus forms and potential release characteristics of phosphogypsum in Tuojiang River basin YANG Geng, QIN Yanwen, MA Yingqun, HAN Chaonan, LIU Zhichao, YANG Chenchen Journal of Environmental Engineering Technology    2018, 8 (6): 610-616.   doi: 10.3969/j.issn.1674-991X.2018.06.081 Abstract （239）   HTML （1）    PDF（pc） （949KB）（161）       The phosphorus form and content, release kinetics characteristics of phosphorus and the influence of environmental factors on phosphorus release were investigated from phosphogypsum samples collected in Tuojiang River basin. The results showed that the TP content of phosphogypsum was 3.70 mg/g, and the release of phosphorus was mainly carried out by Ex-P, Org-P and Fe-P. Among them, Ex-P and Fe-P accounted for a large proportion. When the ratio of water to phosphogypsum was 500 ∶1, the phosphorus release reached the maximum value, and the phosphorus release mainly occurred in the first 8 hours. The maximum release rate of phosphorus from phosphogypsum was 3.52 mg/(g ·h). The first order kinetic equation can fit the phosphorus release kinetic process well with the maximum release Qmax of 2.30 mg/g under the experimental condition. The pH had significant effect on phosphorus release from phosphogypsum, and either acidic or alkaline water environment was conducive to release of phosphate. Higher salinity and temperature were favorable to the release of phosphorus, and total phosphorus release increased the most as temperature increasing from 10 to 25 ℃ with the maximum at 25 ℃.
 Select Journal of Environmental Engineering Technology    2018, 8 (6): 593-594.   Abstract （237）   HTML （14）    PDF（pc） （9667KB）（330）