聚丙烯酰胺性质和结构对厌氧消化前后污泥调理脱水效果的影响

任雨晴; 吴炜; 魏海娟; 周斌; 幸韵欣; 何侃侃; 周振

doi:10.13205/j.hjgc.202308008

聚丙烯酰胺性质和结构对厌氧消化前后污泥调理脱水效果的影响

doi: 10.13205/j.hjgc.202308008

任雨晴¹,
吴炜²,
魏海娟³,
周斌³,
幸韵欣¹,
何侃侃⁴,
周振^1, ,

1. 上海电力大学环境与化学工程学院, 上海 201306;
2. 同济大学环境科学与工程学院, 上海 200092;
3. 上海城投污水处理有限公司白龙港污水处理厂, 上海 201203;
4. 爱森(中国)絮凝剂有限公司, 上海 200040

基金项目:

国家自然科学基金面上项目(51878403)

上海市曙光计划项目(19SG49)

详细信息

作者简介:
任雨晴(1998-),女,硕士研究生,主要研究方向为污泥处理技术。792713169@qq.com

通讯作者:
周振(1981-),男,工学博士,教授,主要研究方向为污/废水处理与资源化技术、污泥减量技术。zhouzhen@shiep.edu.cn

计量
- 文章访问数: 94
- HTML全文浏览量: 9
- PDF下载量: 8
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-17
- 网络出版日期: 2023-11-15

EFFECTS OF PROPERTIES AND STRUCTURE OF POLYACRYLAMIDE ON SLUDGES CONDITIONING AND DEWATERING PERFORMANCE BEFORE AND AFTER ANAEROBIC DIGESTION

1. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China;
2. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
3. Bailonggang Wastewater Treatment Plant, Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China;
4. SNF (China) Flocculant Co., Ltd, Shanghai 200040, China

摘要

摘要: 为研究聚丙烯酰胺(PAM)性质和结构对污泥脱水性能的影响,选取10种常用阳离子PAM对消化进泥(初沉污泥和剩余污泥)和消化出泥进行调理。通过测定PAM调理后的污泥比阻(SRF)、毛细吸水时间(CST)、粒径和脱水后泥饼含水率的变化,并结合流变学特性进行调理效果评价和机制解析。结果表明:不同PAM对2种污泥脱水性能的影响迥异,但大多数PAM调理后消化出泥的脱水性能更优,两者均适合采用大分子、高离子度、支链结构的PAM调理。在优选PAM的最佳投加量为4.0 kg/t下,调理后消化出泥的SRF、CST和粒径分别为0.64×10¹² m/kg、18.6 s和400.5 μm,脱水后泥饼含水率可降低至74.8%。流变学分析结果表明,优选PAM调理后污泥的触变性显著,絮体更大更密实,弹性模量更大,絮体抗剪切能力更强,脱水性能更优。研究结果可为污水处理厂消化污泥调理脱水药剂的选择提供理论依据与技术参考。
- 厌氧消化污泥 /
- 聚丙烯酰胺(PAM) /
- 污泥调理 /
- 污泥脱水 /
- 流变学
Abstract: In order to investigate the effects of the property and structure of polyacrylamide (PAM) on sludge dewatering performance, 10 types of common cationic PAM were chosen for the conditioning of mixed sludge (primary and waste sludge) and anaerobically digested sludge. Changes in sludge specific resistance (SRF), capillary water absorption time (CST), particle size, and moisture content of dewatered sludge cake were determined for PAM-conditioned sludge, and then they were coupled with the rheological property to evaluate the conditioning performance and elucidate governing mechanisms. The results showed that the effects of different types of PAMs on the dewaterability of waste sludge and digested sludge were distinct, and the conditioned digested sludge generally obtained better dewatering performance. Both waste sludge and digested sludge achieved the best dewaterability after being conditioned by the PAM with high molecular weight, high charge density and branched chain PAM. At the optimum dosage of 4.0 kg/t DS for the chosen PAM, the SRF, CST, and particle size of the conditioned digested sludge were 0.64×10¹² m/kg, 18.6 s, and 400.5 μm, and the moisture content of dewatered sludge cake was reduced to 74.8%. Rheological analysis showed that sludge conditioned by the chosen PAM had more obvious thixotropy, larger and denser flocs, higher elasticity modulus, stronger shear resistance, and thus better dewatering performance. The results of this study can provide a theoretical basis and technical reference for conditioner selection for the anaerobically digested sludge in wastewater treatment plants.
- anaerobically digested sludge /
- polyacrylamide (PAM) /
- sludge conditioning /
- dewaterability /
- rheology

HTML全文

参考文献(34)

[1]	我国污泥处理处置现状及发展趋势[J].科学,2020,72(6):30-34.
[2]	WANG N,ZHANG W J,CAO B D,et al.Advanced anaerobic digested sludge dewaterability enhancement using sludge based activated carbon (SBAC) in combination with organic polymers[J].Chemical Engineering Journal,2018,350:660-672.
[3]	MASPOLIM Y,ZHOU Y,GUO C H,et al.Comparison of single-stage and two-phase anaerobic sludge digestion systems-performance and microbial community dynamics[J].Chemosphere,2015,140:54-62.
[4]	JENICEK P,BARTACEK J,KUTIL J,et al.Potentials and limits of anaerobic digestion of sewage sludge:energy self-sufficient municipal wastewater treatment plant?[J].Water Science and Technology,2012,66(6):1277-1281.
[5]	RUAN D N,ZHOU Z,PANG H J,et al.Enhancing methane production of anaerobic sludge digestion by microaeration:enzyme activity stimulation,semi-continuous reactor validation and microbial community analysis[J].Bioresource Technology,2019,289:121643.
[6]	MATA-ALVAREZ J,MACÉ S,LLABRÉS P.Anaerobic digestion of organic solid wastes:an overview of research achievements and perspectives[J].Bioresource Technology,2000,74(1):3-16.
[7]	张博,赵益华,陶君,等.CaO对高浓度污泥厌氧消化性能的影响机理及动力学分析[J].环境工程,2021,39(4):140-146.
[8]	WACŁAWEK S,GRÜBEL K,DENNIS P,et al.A novel approach for simultaneous improvement of dewaterability,post-digestion liquor properties and toluene removal from anaerobically digested sludge[J].Chemical Engineering Journal,2016,291:192-198.
[9]	LI Y F,PAN L Y,ZHU Y Q,et al.How does zero valent iron activating peroxydisulfate improve the dewatering of anaerobically digested sludge?[J].Water Research,2019,163:114912.
[10]	裴海燕,胡文容,李晶,等.活性污泥与消化污泥的脱水特性及粒径分布[J].环境科学,2007,28(10):2236-2242.
[11]	吴宇琦,姜应和.剩余污泥与厌氧消化污泥的脱水性能对比[J].中国给水排水,2018,34(1):82-85.
[12]	吴欣.双氧水联合壳聚糖改善厌氧消化污泥脱水性能的研究[D].北京:北京化工大学,2021.
[13]	吴春旭,董天一,张伟军.铁负载污泥炭的表征及其促进PAM调理高级厌氧消化污泥的效能研究[J].环境科学学报,2021,41(8):3112-3120.
[14]	HO Y C,NORLI I,ALKARKHI A F M,et al.Characterization of biopolymeric flocculant (pectin) and organic synthetic flocculant (PAM):a comparative study on treatment and optimization in kaolin suspension[J].Bioresource Technology,2010,101(4):1166-1174.
[15]	FITRIA D,SCHOLZ M,SWIFT G M.Impact of different shapes and types of mixers on sludge dewaterability[J].Environmental Technology,2013,34(7):931-936.
[16]	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,2017,53(12):11-16.
[17]	周振,陈柳宇,吴炜,等.污泥脱水性能指标表征体系的构建[J].上海电力学院学报,2020,36(1):51-56.
[18]	WANG H F,MA Y J,WANG H J,et al.Applying rheological analysis to better understand the mechanism of acid conditioning on activated sludge dewatering[J].Water Research,2017,122:398-406.
[19]	马旭,范海宏,吕梦琪,等.调理剂对污泥微观结构及脱水性能的影响研究[J].环境工程,2018,36(7):113-116 ,190.
[20]	国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[21]	WU W,ZHOU Z,YANG J Z,et al.Insights into conditioning of landfill sludge by FeCl₃ and lime[J].Water Research,2019,160:167-177.
[22]	申迎华,王斌,王志忠.有机高分子絮凝剂在污泥脱水中的应用[J].高分子材料科学与工程,2004,20(5):55-58 ,62.
[23]	YAN W L,WANG Y L,CHEN Y J.Effect of conditioning by PAM polymers with different charges on the structural and characteristic evolutions of water treatment residuals[J].Water Research,2013,47(17):6445-6456.
[24]	LUO Y L,YANG Z H,XU Z Y,et al.Effect of trace amounts of polyacrylamide (PAM) on long-term performance of activated sludge[J].Journal of Hazardous Materials,2011,189(1):69-75.
[25]	LABANDA J,LLORENS J.Improvement of the deflocculating power of polyacrylates in ceramic slips by small additions of quaternary ammonium salts[J].Powder Technology,2005,155(3):181-186.
[26]	HII K,PARTHASARATHY R,BAROUTIAN S,et al.Rheological measurements as a tool for monitoring the performance of high pressure and high temperature treatment of sewage sludge[J].Water Research,2017,114:254-263.
[27]	LEE C H,LIU J C.Enhanced sludge dewatering by dual polyelectrolytes conditioning[J].Water Research,2000,34(18):4430-4436.
[28]	WU W,ZHOU Z,CHEN L Y,et al.Conditioning for excess sludge and ozonized sludge by ferric salt and polyacrylamide:orthogonal optimization,rheological characteristics and floc properties[J].Chemical Engineering Journal,2019,373:1081-1090.
[29]	CHEN B H,LEE S J,LEE D J.Rheological characteristics of the cationic polyelectrolyte flocculated wastewater sludge[J].Water Research,2005,39(18):4429-4435.
[30]	WU W,MA J X,XU J,et al.Mechanistic insights into chemical conditioning by polyacrylamide with different charge densities and its impacts on sludge dewaterability[J].Chemical Engineering Journal,2021,410:128425.
[31]	WU B R,DAI X H,CHAI X L.Critical review on dewatering of sewage sludge:influential mechanism,conditioning technologies and implications to sludge re-utilizations[J].Water Research,2020,180:115912.
[32]	黄青,邵俊,余薇.聚合氯化铝-聚丙烯酰胺复合絮凝剂的特性及絮凝作用[J].化学工程师,2011,25(6):68-71.
[33]	KANG J,MCLAUGHLIN RA,AMOOZEGAR A,et al.Transport of dissolved polyacrylamide through a clay loam soil[J].Geoderma,2015,243/244:108-114.
[34]	胡智.絮凝调理对城市污泥脱水及流动性能的影响研究[D].太原:太原科技大学,2021.