[1]张慧慧,王佳伟,张建新,等.聚硅酸增强协同厌氧消化污泥调理脱水效能与机理[J].中国给水排水,2025,41(21):17-23.
　ZHANGHui-hui,WANGJia-wei,ZHANGJian-xin,et al.Mechanism and Efficiency of Polysilicic Acid in Enhancing Conditioning and Dewatering of Sludge from Synergistic Anaerobic Digestion[J].China Water & Wastewater,2025,41(21):17-23.
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聚硅酸增强协同厌氧消化污泥调理脱水效能与机理

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第21期 页码: 17-23 栏目: 出版日期: 2025-11-01
Title:
Mechanism and Efficiency of Polysilicic Acid in Enhancing Conditioning and Dewatering of Sludge from Synergistic Anaerobic Digestion
作者:
张慧慧1，2， 王佳伟1，2， 张建新1，2， 付兴民1，2， 文洋1，2， 王玮1，2， 陈倩1，2， 赵亚伟1，2
（1.北京城市排水集团有限责任公司，北京 100044；2.北京市污水资源化工程技术研究中心，北京 100124）
Author(s):
ZHANG　Hui-hui1，2， WANG　Jia-wei1，2， ZHANG　Jian-xin1，2， FU　Xing-min1，2， WEN　Yang1，2， WANG　Wei1，2， CHEN　Qian1，2， ZHAO　Ya-wei1，2
（1. Beijing Drainage Group Co. Ltd.， Beijing 100044， China； 2. Beijing Engineering Technology Research Center for Municipal Sewage Reclamation， Beijing 100124， China）
关键词:
协同厌氧消化污泥;  聚硅酸;  调理脱水;  毛细吸水时间;  机理
Keywords:
synergistic anaerobic digestion sludge;  polysilicic acid (PSA);  conditioning dewatering;  capillary suction time (CST);  mechanism
摘要:
针对协同厌氧消化污泥调理脱水难度大的问题，研究了协同厌氧消化污泥的性质以及影响因素，开展了聚硅酸（PSA）增强协同厌氧消化污泥调理脱水效果的研究。采用的调理方式为“铝铁盐（AF）+PSA+聚丙烯酰胺（PAM）”。结果表明，协同厌氧消化污泥粒径小、比表面积大，絮体强度低，脱水性能差；调理协同厌氧消化污泥效果较好时聚硅酸黏度为（8.41±0.02） mPa·s，形态为类花瓣网状孔结构；PSA增强调理可使污泥毛细吸水时间（CST）进一步降低6.5%~13.3%；当PSA投加量为0.92%时，污泥絮体粒径增大接近1倍；抽滤1 min时间内，增强调理后污泥脱水速度加快，抽滤后泥饼含水率降低。PSA主要通过吸附、网捕作用增强污泥脱水能力，该技术具有经济性和环保优势。
Abstract:
Given the challenges associated with conditioning and dewatering of synergistic anaerobic digestion sludge, this study investigated the properties and influencing factors of such sludge, alongside the application of polysilicic acid (PSA) to improve its conditioning and dewatering efficiency. The conditioning method employed comprised “aluminum ferric salt (AF) +PSA+polyacrylamide (PAM)”. The findings indicated that synergistic anaerobic digestion sludge was characterized by small particle size, large specific surface area, low floc strength, and poor dewatering performance. Notably, PSA exhibited a viscosity of (8.41±0.02) mPa·s when effective conditioning was achieved, with a petal-like reticulated pore structure. The use of PSA in enhanced conditioning resulted in an increase in the reduction rate of sludge capillary suction time (CST) by 6.5% to 13.3%. Additionally, the particle size of sludge flocs nearly doubled when a dosage of 0.92% was applied. Within the first minute of suction filtration, the dewatering rate of the sludge was accelerated, and the moisture content of the resulting cake was reduced. PSA primarily improves sludge dewatering efficiency through mechanisms of adsorption and net trapping，which offers both economic and environmental benefits.
更新日期/Last Update: 2025-11-01