化学法调理生化污泥脱水效果研究

石万里; 张大鹏; 赵泽华; 张成; 耿新祥; 马文滢

doi:10.12153/j.issn.1674-991X.20190114

化学法调理生化污泥脱水效果研究

doi: 10.12153/j.issn.1674-991X.20190114

^1. 中国电建集团华东勘测设计研究院有限公司
^2. 生态环境部南京环境科学研究所
^3. 南京师范大学化学与材料科学学院

详细信息

作者简介:
石万里(1990—),男,工程师,硕士,主要从事城镇给排水与污水治理研究,shi_wl@ecidi.com

通讯作者:
马文滢 E-mail: ma_wy@ecidi.com

中图分类号: X703
计量
- 文章访问数: 382
- HTML全文浏览量: 128
- PDF下载量: 130
- 被引次数: 0
出版历程
- 收稿日期: 2019-07-01
- 刊出日期: 2020-03-20

Study on the effect of chemical conditioning method on the dewatering effect of biochemical sludge

^1. POWERCHINA Huadong Engineering Co., Ltd.
^2. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment
^3. College of Chemistry and Materials Sciences, Nanjing Normal University

More Information

Corresponding author: Wenying MA E-mail: ma_wy@ecidi.com

摘要

摘要: 针对城市污水处理厂的生化污泥含水量较高不利于后续处理的问题,采用次氯酸钠氧化法、芬顿(Fenton)氧化法及Fenton+氧化钙(CaO)联合法,通过单因素分析法优化工艺条件,对污泥进行脱水处理试验研究。结果表明:在优化工艺条件下,使用次氯酸钠对生化污泥进行氧化后,污泥含水率可由89.90%降至78.44%,产生滤液的质量约为污泥质量的50%;在Fenton氧化体系中,污泥的含水率可由89.90%降至65.32%,产生滤液的质量约为污泥质量的60%;而在使用Fenton+CaO联合法调理后,污泥的含水率可降至51.06%,产生滤液的质量约为污泥质量的56%。在Fenton氧化体系中加入CaO促进了铁离子的水解,氢氧化铁-硫酸钙与过量的硫酸钙结晶析出晶体,构成的刚性骨架在污泥中形成大量透水通道,提高生化污水的脱水性能。综合考虑污泥脱水效果和药剂成本,确定污泥脱水的最佳调理方法为Fenton+CaO联合法。
- 化学调理法 /
- 污泥脱水 /
- 生化污泥 /
- 效果
Abstract: In view of the high water content of biochemical sludge in urban sewage treatment plants, which was not conducive to the following treatment, the sodium hypochlorite oxidation method, Fenton oxidation method and Fenton + calcium oxide combined method were used to dewater the sludge, respectively, combined with single factor analysis to optimize external conditions. The experimental results showed under the optimized conditions, the sludge moisture content could be reduced from 89.90% to 78.44%, and the filtrate quality was about 50% of the initial sludge quality, when sodium hypochlorite was selected as the oxidant. The moisture content of sludge could be reduced to 65.32%, and the filtrate quality increased to 60% in Fenton oxidation system. After combined with calcium oxide, the moisture content of sludge could be further reduced to 51.06%, and the filtrate quality was about 56% of the initial sludge quality. The addition of calcium oxide promoted the hydrolysis of iron ions, and iron hydroxide-calcium sulfate and excess calcium sulfate crystallized. The rigid skeleton constructed could form a large number of water-permeable channels in the sludge, and thus improve the dewatering performance of biochemical sewage. Considering the sludge dewatering effect and chemical cost, Fenton + calcium oxide combined method was found to be the best conditioning method.
- chemical conditioning /
- sludge dewatering /
- biochemical sludge /
- effect

HTML全文

参考文献(32)

[1]	肖航, 杨硕, 史佳晟 , 等. 城市污泥脱水速率与泥饼含水率的表征差异性研究[J]. 环境科学学报, 2016,36(2):564-568. XIAO H, YANG S, SHI J S , et al. Differences between apparent indicators in describing dewatering rate and cake moisture content of municipal sludge[J]. Acta Scientiae Circumstantiae, 2016,36(2):564-568.
[2]	徐振佳, 张雪英, 周俊 , 等. 城市污水厂剩余污泥脱水技术综述[J]. 净水技术, 2018,37(2):38-44. XU Z J, ZHANG X Y, ZHOU J , et al. Technical review of dewatering process for excess sludge of municipal sewage plant[J]. Water Purification Technology, 2018,37(2):38-44.
[3]	单凤君 . 城市污水污泥脱水的最新研究进展[J]. 工业水处理, 2017,37(2):7-17. SHAN F J . Newest research progress in the dewatering of urban sewage sludge[J]. Industrial Water Treatment, 2017,37(2):7-17.
[4]	HE D, WANG L, JIANG H , et al. A Fenton-like process for the enhanced activated sludge dewatering[J]. Chemical Engineering Journal, 2015,272:128-134.
[5]	HONG C, XING Y, HUA X , et al. Dewaterability of sludge conditioned with surfactant DDBAC pretreatment by acid∕alkali[J]. Applied Microbiology and Biotechnology, 2015,99(14):6103-6111.
[6]	张义勇, 刘兵伟, 史胜波 . 污泥深度脱水药剂及其在改善污泥脱水性能中的应用[J]. 环境与可持续发展, 2018,43(2):148-150. ZHANG Y Y, LIU B W, SHI S B . Study of deep dewatering of sludge and its application in the improvement of sludge dewatering performance[J]. Environmental and Sustainable Development, 2018,43(2):148-150.
[7]	汤连生, 张龙舰, 罗珍贵 . 污泥中水分布形式划分及脱水性能研究[J]. 生态环境学报, 2017,26(2):309-314. TANG L S, ZHANG L J, LUO Z G . Water distribution and dewatering performance in sludge[J]. Ecology and Environmental Sciences, 2017,26(2):309-314.
[8]	苑宏英, 杨玉萍, 汪艳宁 , 等. 不同氧化剂对污泥脱水性能及水解特性的影响研究[J]. 环境科学与技术, 2017,40(9):33-37. YUAN H Y, YANG Y P, WANG Y N , et al. Effects of different oxidation agents on sludge dewatering and hydrolysis performance[J]. Environmental Science & Technology, 2017,40(9):33-37.
[9]	SKINNER S, STUDER L, DIXON D , et al. Quantification of wastewater sludge dewatering[J]. Water Research, 2015,82(1):2-13.
[10]	BUGGE T, LARSEN P, SAUNDERS A , et al. Filtration properties of activated sludge in municipal MBR wastewater treatment plants are related to microbial community structure[J]. Water Research, 2013,47(1):6719-6730.
[11]	丁绍兰, 田倩倩, 董凌霄 . 过氧化钙预氧化对污泥脱水特性的影响[J]. 陕西科技大学学报, 2018,36(4):17-22. DING S L, TIAN Q Q, DONG L X . The effect of pre oxidation of calcium peroxide on the characteristic of sludge dewatering[J]. Journal of Shaanxi University of Science & Technology, 2018,36(4):17-22.
[12]	唐建国, 吴炜, 周振 , 等. 污泥脱水性能测定对污泥调理与脱水的重要性分析[J]. 给水排水, 2017,43(12):11-16. TANG J G, WU W, ZHOU Z , et al. Analysis of the significance of sludge dewatering property determination to sludge conditioning and dewatering[J]. Water & Wastewater Engineering, 2017,43(12):11-16.
[13]	DAI Q X, MA L P, REN N Q , et al. Investigation on extracellular polymeric substances,sludge flocs morphology,bound water release and dewatering performance of sewage sludge under pretreatment with modified phosphogypsum[J]. Water Research, 2018,142:337-346.
[14]	ZHOU K, STUBER J, SCHUBER R , et al. Full-scale performance of selected starch-based biodegradable polymers in sludge dewatering and recommendation for applications[J]. Water Science & Technology, 2017,77(1):7-16.
[15]	PENG H, ZHONG S, XIANG J , et al. Characterization and secondary sludge dewatering performance of a novel combined aluminum-ferrous-starch flocculant(CAFS)[J]. Chemical Engineering Science, 2017,173:335-345.
[16]	周雨珺, 付豪逸, 范先锋 , 等. 改善污泥脱水性能的丝状真菌的分离及其促进污泥脱水的机制初探[J]. 环境科学, 2015,36(2):612-618. ZHOU Y J, FU H Y, FAN X F , et al. Isolation of filamentous fungi capable of enhancing sludge dewaterability and study of mechanisms responsible for the sludge dewaterability enhancement[J]. Environmental Science, 2015,36(2):612-618.
[17]	胡金财, 谈振娇, 张轶 , 等. 污泥生物沥渍法深度脱水工程及其运行效果分析[J]. 给水排水, 2013,39(7):48-52. HU J C, TAN Z J, ZHANG Y , et al. Deep dewatering project of biological sludge leaching method and its operation effect analysis[J]. Water & Wastewater Engineering, 2013,39(7):48-52.
[18]	柯水洲, 李海鹏, 陈小龙 . 基于化学溶胞改善污泥脱水性能的试验研究[J]. 安全与环境工程, 2015,22(6):35-41. KE S Z, LI H P, CHEN X L . Study on enhancement of sludge dewaterabililty based on chemical cell lysis[J]. Safety and Environmental Engineering, 2015,22(6):35-41.
[19]	骆丽宁, 王丽娟, 杨敏 , 等. 氧化-铁盐絮凝联合对调理改善污泥脱水性能的影响[J]. 环境工程学报, 2018,12(2):630-637. LUO L N, WANG L J, YANG M , et al. Combined effects of oxidation and iron coagulation on sludge co-conditioning and dehydration performance[J]. Chinese Journal of Environmental Engineering, 2018,12(2):630-637.
[20]	CAIA M, HUA J, LIAN G , et al. Synergetic pretreatment of waste activated sludge by hydrodynamic cavitation combined with Fenton reaction for enhanced dewatering[J]. Ultrasonics-Sonochemistry, 2018,42:609-618.
[21]	GUAN R, YUAN X, WU Z , et al. Principle and application of hydrogen peroxide based advanced oxidation processes in activated sludge treatment: a review[J]. Chemical Engineering Journal, 2018,339:519-530.
[22]	LIU H, LIU P, HU H , et al. Combined effects of Fenton peroxidation and CaO conditioning on sewage sludge thermal drying[J]. Chemosphere, 2014,117:559-566.
[23]	梁柱, 罗平, 殷井云 , 等. Fenton复合调理剂对污泥脱水性能的影响研究[J]. 环境科学与管理, 2017,42(3):88-92. LIANG Z, LUO P, YIN J Y , et al. Effects of Fenton composite conditioner on dewatering performance of sludge[J]. Environmental Science and Management, 2017,42(3):88-92.
[24]	张河仪, 胡斌 . 次氯酸钠溶液稳定性的研究[J]. 氯碱工业, 2018,54(7):35-37. ZHANG H Y, HU B . Study on the stability of sodium hypochlorite solution[J]. Chlor-Alkali Industry, 2018,54(7):35-37.
[25]	樊力, 刘宝会, 李锋涛 , 等. 次氯酸钠在超滤化学清洗和加强反洗中的应用[J]. 化工管理, 2017(5):86. FAN L, LIU B H, LI F T , et al. Application of sodium hypochlorite in ultrafiltration chemical cleaning and enhanced backwash[J]. Chemical Enterprise Management, 2017(5):86.
[26]	张铭 . 羟基自由基与无机含氧酸盐反应[D]. 大连:大连海事大学, 2015.
[27]	刘强, 陈晓欢, 傅金祥 , 等. 粉煤灰与生石灰复合调理剂对市政污泥深度脱水性能的影响[J]. 环境工程学报, 2015,9(7):3468-3472. LIU Q, CHEN X H, FU J X , et al. Effect of fly ash combined quicklime composite conditioners on dewatering of sewage sludge[J]. Chinese Journal of Environmental Engineering, 2015,9(7):3468-3472.
[28]	黄绍松, 梁嘉林, 张斯玮 , 等. Fenton氧化联合氧化钙调理对污泥脱水的机理研究[J]. 环境科学学报, 2015,38(5):1906-1919. HUANG S S, LIANG J L, ZHANG S W , et al. A comprehensive mechanism for deeply dewatering sludge using Fenton's reagent with lime[J]. Acta Scientiae Circumstantiae, 2018,38(5):1906-1919.
[29]	巩小丽, 陈煜, 杜瑛娜 , 等. Fenton试剂调理污泥的研究进展[J]. 环境工程, 2018,36(8):107-112. GONG X L, CHEN Y, DU Y N , et al. Advances in conditioning of sludge by Fenton reagent[J]. Environmental Engineering, 2018,36(8):107-112.
[30]	王强 . Fenton∕NaClO∕O₃氧化破解二沉池回流污泥的实验研究[D]. 兰州:兰州交通大学, 2015.
[31]	田宝风, 周倜, 江双双 , 等. 一种利用Fenton污泥对市政污泥原位脱水的方法:105417928A[P].2015-03-26.
[32]	徐文迪, 常沙, 傅金祥 , 等. 基于过氧化钙(CaO₂)的类芬顿污泥预处理技术研究[J]. 环境工程, 2018,36(7):117-121. XU W D, CHANG S, FU J X , et al. Research on pretreatment of sewage sludge by a Fenton-like technology with calcium peroxide(CaO2)[J]. Environmental Engineering, 2018,36(7):117-121.