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| 聚季铵盐调理污泥深度脱水过程与中试效能 | |
| 引用本文： | 王子文,曹蓉,杨艳坤,朱引,王硕,李激.聚季铵盐调理污泥深度脱水过程与中试效能[J].化工进展,2019,38(7):3458-3464. |
| 作者姓名： | 王子文 曹蓉 杨艳坤 朱引 王硕 李激 |
| 作者单位： | 江南大学环境与土木工程学院,江苏无锡,214122;江南大学环境与土木工程学院,江苏无锡214122;江苏省厌氧生物技术重点实验室,江苏无锡214122;江苏高校水处理技术与材料协同创新中心,江苏苏州215009 |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2013ZX07315-003);江苏省政策引导类计划（产学研合作）前瞻性联合研究项目(BY2015019-27) |
| 摘 要： | 采用聚季铵盐P(DM-AM)]取代传统化学调理剂聚丙烯酰胺（polyacrylamide，PAM），通过分析污泥脱水性能、胞外聚合物含量以及抽滤液水质指标，验证P(DM-AM)作为污泥调理剂的效果。结果表明，P(DM-AM)作为阳离子型高分子絮凝剂能够提高污泥的脱水性能，在最适投加量为0.4%～0.5%（按污泥干固量计算）时，毛细吸水时间（capillary absorption time，CST）和污泥比阻（specific resistance of sludge，SRF）分别下降48%和40%，污泥热值可达2686cal/g（1cal=4.18J）。当P(DM-AM)协同生石灰（CaO）和氯化铁（FeCl3）作为调理剂调理污泥时，处理后的污泥水分去除率可升高55%左右，与污泥紧密结合型胞外聚合物（tightly bound-EPS，TB-EPS）中的多糖含量降低了74%，且污泥中Cl-浓度约为92.3mg/gDS，较采用PAM调理的污泥下降约6%，可缓解污泥焚烧对焚烧炉腐蚀的影响。同时，P(DM-AM)调理污泥后，其抽滤液化学需氧量（chemical oxygen demand，COD）由2120mg/L降低至1941.8mg/L，可有效减轻污水处理厂运行负担。 |
| 关 键 词： | 聚季铵盐 聚合物 过滤 胞外聚合物 废物处理 中试效能 |
| 收稿时间： | 2018-09-27 |
Performance and pilot-scale efficiency of polyquaternary ammonium in sludge deep dewatering process |
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| Ziwen WANG,Rong CAO,Yankun YANG,Yin ZHU,Shuo WANG,Ji LI.Performance and pilot-scale efficiency of polyquaternary ammonium in sludge deep dewatering process[J].Chemical Industry and Engineering Progress,2019,38(7):3458-3464. | |
| Authors: | Ziwen WANG Rong CAO Yankun YANG Yin ZHU Shuo WANG Ji LI |
| Affiliation: | 1. School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China 2. Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, Jiangsu, China 3. Collaborative Innovation Center of Water Treatment Technology and Material of Jiangsu Colleges, Suzhou 215009, Jiangsu, China |
| Abstract: | Polyquaternary ammonium P(DM-AM)] was employed to substitute traditional sludge dewatering agent polyacrylamide (PAM) in this study. The property of P(DM-AM) was verified by analyzing the dewatering performance, extracellular polymeric substances content, and filtrate quality. The results showed that P(DM-AM), as a cationic macromolecular flocculant, can improve the dewatering performance of sludge. When the dosage was 0.4%—0.5% (calculated according to the dry solids of sludge), capillary absorption time (CST) and specific resistance of sludge (SRF) decreased by 48% and 40%, respectively, and the thermal value of sludge could reach 2686cal/g. When CaO and FeCl3 as sludge conditioners collaborated with P(DM-AM), sludge moisture removal rate increased by about 55% and the polysaccharides content in tightly bound-EPS (TB-EPS) was reduced by 74%. The Cl- concentration in the sludge was 92.3mg/gDS, reduced by 6% compared with traditional PAM, which can relieve the influence of sludge incineration ash on incinerator. The chemical oxygen demand (COD) of the filtrate was reduced from 2120mg/L to 1941.8mg/L, which was conducive to the operation of wastewater treatment plant. |
| Keywords: | polyquaternary ammonium polymers filtration extracellular polymeric substances (EPS) waste treatment pilot-scale efficiency |
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