中国科技核心期刊
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20 July 2019, Volume 9 Issue 4
 Analysis of atmospheric circulation situation and allocation characteristics of heavily polluted weather in Langfang City ZHANG Weizhong,YAN Lixia,GUO Liping,QIN Yunmiao,SHAN Kun,WEN Jing 2019, 9 (4):  335-341.  doi: 10.12153/j.issn.1674-991X.2019.01.241 Abstract ( 92 )   HTML ( 12 )   PDF (1899KB) ( 22 )   The characteristics of surface weather pattern and high-altitude circulation pattern of heavily polluted weather at 08:00 were studied by using the data from 2013 to 2015 in Langfang City, and the configuration of high and low-altitude atmospheric circulation analyzed. The results showed that there were 8 types of surface weather circulation patterns, among which the bottom of high pressure accounted for the most, and the rear of high pressure, deformed high pressure and the front of high pressure appeared more. Whenever slight or severe haze occurred, the most surface weather circulation pattern was the bottom of high pressure, the backflow situation appeared the most in mild haze, while the rear of the high pressure field was the most in moderate haze. There were 7 types of 700 hPa circulation, with the northwest airflow before the ridge taking the largest proportion, followed by straight west airflow and southwest airflow before the trough. The slight haze and severe haze most controlled by the northwest airflow before the ridge, while the mild haze and moderate haze were dominated by the straight west wind. There were 9 types of high and low altitude atmospheric circulation configuration, with three main configuration situations being 700 hPa high-pressure ridge control with ground high-pressure field, 700 hPa straight west wind with ground high-pressure field, and 700 hPa high-air trough with ground high-pressure field. Whenever slight or severe haze occurred, the main configuration type was high-pressure ridge in 700 hPa with high-pressure field on surface. When mild haze and moderate haze occurred, the main configuration type was straight western airflow in 700 hPa with high-pressure field on surface. During 3-5 days of continuous haze process, high pressure bottom accounted for the most on the ground, and the proportion of the high altitude situation of the straight westerly circulation, ridge, high-altitude groove was 36.0%, 35.2% and 28.9%, respectively. The most typical circulation situation of high and low air configuration was controlled by high-pressure ridge at high altitude, and for the ground circulation the most typical situation was the bottom of high pressure.
 VOCs emission inventory and characteristics of farmland ecosystem in a county of Kaifeng City HU Jingyi,LIU Duo,DENG Zhixin,WANG Hao,YAN Haojie,ZOU Pengfei,SU Yanxia 2019, 9 (4):  342-346.  doi: 10.12153/j.issn.1674-991X.2019.03.180 Abstract ( 80 )   HTML ( 5 )   PDF (1263KB) ( 50 )   By taking a bottom-up approach, the pesticide use and agricultural machinery were investigated in a county of Kaifeng City, and combining with Kaifeng Statistical Yearbook 2017, the VOCs emissions of farmland ecosystems in villages and towns were calculated using the emission factor method. Based on these data, the VOCs emission inventory of farmland ecosystem in the county was established. The results showed that the total VOCs emissions from farmland ecosystem in 2017 were 7 255.81 t. The largest VOCs emissions were from the use of pesticides, which reached 7 114.20 t, followed by agricultural machinery diesel VOCs emissions of 141.61 t. According to the VOCs emission amount and the geographical coordinate information of each township, the pollutant emission concentrations were visualized using ArcGIS, and the spatial distribution charts of VOCs emission intensity in the county were established. It was found that the VOCs emission intensity of each township was quite different, and the emission intensity of most townships was at a high level. Based on these results, some preliminary suggestions on emission reduction were made, such as building a scientific and rational agricultural production system, increasing VOCs supervision, improving pesticide utilization rate and reducing agricultural diesel oil consumption.
 Evaluation of rural domestic wastewater treatment technologies in Lake Erhai Basin LI Liang,CAO Xinran,PANG Yan,XU Qiujin,HU Xiaozhen,GUAN Heqing 2019, 9 (4):  349-354.  doi: 10.12153/j.issn.1674-991X.2019.01.060 Abstract ( 92 )   HTML ( 9 )   PDF (867KB) ( 72 )   The evaluation of water pollution treatment technologies is of great significance to understand the current situation and level of technologies. According to the technical characteristics of rural domestic wastewater treatment in Lake Erhai Basin, a fully quantified technical evaluation index system was established, including 8 indicators in economic benefit, environmental benefit and technical level. Based on expert consultation and analytic hierarchy process, the calculation method of technical benefit evaluation was put forward, and five rural domestic wastewater treatment technologies in Lake Erhai Basin were evaluated, including a whole set of wastewater treatment technology from perimeter of the lake bay, the anaerobic pond and surface flow wetland technology, the FMBR technology for mixed wastewater of living and farming, the integrated technology of living and farming wastewater treatment, the integrated technology of anaerobic pond and soil treatment tank. The results showed that the comprehensive benefit (A) score of the five technologies was 6.11-8.19. The integrated technology of anaerobic pond and soil treatment tank, and the integrated technology of living and farming wastewater treatment were excellent, and the other three technologies were good. As the technologies are applied according to the results of the technology evaluation, the appropriate technologies should be selected according to the results of the itemized evaluation of technical and economic benefits and environmental benefits.
 Evaluation of agricultural non-point source pollution control technologies based on analytic hierarchy process LI Yanling,ZHU Changxiong,LI Hongna,GENG Bing 2019, 9 (4):  355-361.  doi: 10.12153/j.issn.1674-991X.2018.12.201 Abstract ( 40 )   HTML ( 2 )   PDF (818KB) ( 14 )   According to the technical characteristics of agricultural non-point source pollution prevention and control in China, an index system of 14 evaluation indexes including economic benefit, environmental benefit and technical applicability was established. Combining the index system with the analytic hierarchy process (AHP), an agricultural non-point source pollution prevention and control technology evaluation system based on AHP was established. By combining the weight of indicators with the score of experts in relevant fields, the technology was comprehensively evaluated to determine the level of technology. The technology evaluation method was applied to evaluate 6 agricultural non-point source pollution prevention and control technologies in 3 categories. It revealed: the evaluation levels of nutrient loss control technology and ecological interception technology for bioactive carbon were neutralization and good respectively; the pollution control technology of microbial fermentation bed of corn straw and UASB+SBR treatment technology were rated as good and medium respectively; the treatment technology of anaerobic-soil purification bed and anaerobic-falling water oxygenation-contact oxidation-artificial wetland were rated as medium. The technical evaluation method is applicable to the comparison and screening of different single technologies in the prevention and control of different types of agricultural non-point source pollution.
 Establishment and application of drinking water insurance technology system from water source to tap LIN Mingli,QIN Jianming,ZHANG Quanbin 2019, 9 (4):  362-367.  doi: 10.12153/j.issn.1674-991X.2019.01.190 Abstract ( 61 )   HTML ( 6 )   PDF (3929KB) ( 8 )   In response to problems of water source contamination, water quality security risk, and the difficult removal of poisonous and pernicious substances such as algae, odor, ammonia nitrogen and arsenic, the National Major Science and Technology Program for Water Pollution Control and Treatment in the 11 th and 12 th five-year plan periods developed significant technologies covering water regulation, water quality purification, water distribution system and its monitoring and evaluation, advance warning and emergency treatment, and drinking water security control. On this basis, the drinking water insurance multi-barrier process with ozone-GAC and membrane separation as core technologies has been established, and domestic-produced critical equipment and materials realized. Moreover, the drinking water insurance technology system from water source to tap has been established and applied in Taihu Lake Basin and South-to-North Water Diversion Project benefited regions in large scales, leading to an accumulative water supply scale of over 10 million m 3/d and a benefited population of over 80 million, and providing technical support for improvement of the qualified rate of urban water supply quality from 58.2% in 2009 to 96.0% presently. In the meanwhile, the achievements have provided systematic technical support for national urban-rural water supply planning, urban water supply quality supervision and the construction of water supply emergency rescue bases.
 An empirical study on green investment and economic growth based on investment multipliers HE Lei,HUANG Xiang,SHEN Peng,LIU Xiaoyu,CAO Bao 2019, 9 (4):  368-374.  doi: 10.12153/j.issn.1674-991X.2019.06.170 Abstract ( 46 )   HTML ( 6 )   PDF (825KB) ( 11 )   As one of the important tools of macro-economic policy evaluation, the investment multiplier has been widely applied in both theory and empirical evidence. However traditional investment multiplier does not reflect the environmental cost of economic development, which is not conducive to guiding the development of green economy. The concept and calculation model of green investment multiplier were proposed and Taihu Lake Basin was taken as an example to test the Keynesian four-sector investment multiplier (KS), expanded investment multiplier (KZ) and green investment multiplier (KE) from 2006 to 2014. By comparing and analyzing their influencing parameters of the three types of investment multiplier, it revealed that KS showed a light dynamic change from 2006 to 2014,with no obvious growth or downward trend, and the value of KS was slightly greater than 1 which meant that it had a certain pulling effect on the economy, but not very large. The value of multipliers KZ was greater than 2 and that of KE mostly greater than 3, and especially the multi-year average value of KE was 17.3 percentage points higher than that of KS, indicating that the green investment had a significant pulling effect on the economy. KE showed an increasing trend from 2006 to 2010, however, from year 2010, this trend had changed, with a downward trend of KE. This indicated that the pulling effect of traditional investment on the economy had become weak after 2010. Green investment multiplier can organically link investment, economic growth and environmental costs, and help guide green development. Therefore, it is necessary to increase green investment support to lead a new round of economic growth.
 Influence of substrate concentration on the nitrogen removal and relative genes of denitrifying MBBR for the treatment of reverse osmosis concentrate LI Li,YAN Guokai,WANG Haiyan,LING Yu,ZHAO Yuanzhe,WANG Huan 2019, 9 (4):  375-383.  doi: 10.12153/j.issn.1674-991X.2019.04.260 Abstract ( 68 )   HTML ( 6 )   PDF (4591KB) ( 31 )   Denitrifying MBBR was used for the treatment of reverse osmosis concentrate with high TN and N $O x -$ -N (N $O 3 -$ -N and N $O 2 -$ -N) concentrations, which was generated from Dalton Filtration Reverse Osmosis (DFRO) unit in the high-quality water reclamation process of wastewater treatment plant effluent. The variation of denitrifying MBBR efficiency and the copy number of nitrogen removal genes were studied extensively under four different substrate concentrations. The results show that when the influent N $O 3 -$ -N and TN increased within the range of (8.70±6.34)-(24.23±8.69) and (28.43±5.69)-(44.10±7.37) mg/L, respectively, the N $O 3 -$ -N and TN removal ratios remained stable with the increase of removal rates, but the N $O 3 -$ -N and TN removal rates increased, while the N $O 2 -$ -N removal ratios and rates decreased. The N $O 3 -$ -N and TN removal ratios and rates decreased when the influent N $O 2 -$ -N concentration increased within the range of (10.94±8.51)-(20.94±5.78) mg/L, while the N $O 2 -$ -N removal ratios and rates increased. The biofilm on denitrifying MBBR carriers mainly consisted of cocci, bacillus and filamentous bacteria. The copy numbers of nitrogen removal genes in carrier biofilm and suspended sludge increased with the increase of influent N $O 3 -$ -N and TN concentration, and the copy numbers of nirK, nirS and Anammox genes also increased with the increase of influent N $O 2 -$ -N concentration.
 Treatment of organic pollutants in caprolactam wastewater by SBR and electrocatalytic oxidation combined process DU Song 2019, 9 (4):  384-388.  doi: 10.12153/j.issn.1674-991X.2019.03.260 Abstract ( 29 )   HTML ( 3 )   PDF (1822KB) ( 15 )   The removal effect of organic compounds from caprolactam wastewater by Fenton process, SBR and electrocatalytic oxidation was studied, and the pilot of SBR plus electrocatalytic oxidation processes was set up to study the removal efficiency of organic compounds from caprolactam wastewater, the effect stability and the economy. The results showed that the CODCr removal rate by oxidant in Fenton process was 90.0% with the oxidant dosage of 3.0%, but the cost of oxidant was high. The removal rate of CODCr by SBR was 56.1%, and the single process was difficult to meet the processing requirements. The removal rate of CODCr by electrocatalytic oxidation was 43.5% at appropriate energy consumption, the single process was difficult to meet the processing requirements and the unit power consumption was high. The removal rate of CODCr by SBR plus electrocatalytic oxidation combined process was above 90.0% and the effluent CODCr was reduced to 200-300 mg/L, with the treatment cost of 5.15 yuan/m 3, indicating both technically and economically feasible.