摘要
该研究从影响污泥脱水性能的胞外聚合物(EPS)形态及蛋白质、多糖分布入手,对废水处理中的污泥进行分层测定,并探讨柠檬酸废水污泥脱水的主要机理。实验结果表明,在污泥各层中蛋白质和多糖的分布模式不同,二沉池剩余污泥、浓缩池污泥、经CPAM调理后的浓缩池污泥的pellet层中的蛋白质和多糖分别占污泥总蛋白质的78.76%和92.86%、89.26%和95.55%、91.68%和95.05%,表明污泥中蛋白质和多糖都主要分布在pellet层,而LB-EPS层和TB-EPS层中几乎没有。此外,污泥在脱水处理过程中slime层中的蛋白质和多糖分别降低了9.28%和1.72%,pellet层中的蛋白质和多糖分别增加了10.5%和2.69%,表明slime层中的蛋白质和多糖均转移到了pellet层。而经CPAM调理后的污泥,蛋白质与多糖含量的比值也有所增加,有利于污泥脱水的性能的提高。
The study was started with extracellular polymeric substances from sludge(EPS) morphology, distribution of pro-tein and polysaccharide which have impact on the wastewater treatment sludge, and to explore the mechanism of citric acid wastewater sludge. The experimental results showed the different distribution pattern of protein and polysaccharide in each layer of sludge, the protein and polysaccharide in the pellet of STS,TTS,CTS in accounted for 78.76 % and 92.86% of the total protein of sludge, 89.26% and 95.55%, 91.68% and 95.05%. It showed the protein and polysaccharide of sludge are mainly distributed in the pellet, LB-EPS and TB-EPS are few. In addition, the protein and polysaccharide in the slime were de-creased by 9.28% and 1.72% and in the pellet were increased by 10.5% and 2.69% in sludge dehydration process. It showed that the proteins and polysaccharides in the slime were transferred to the pellet. The ratio of protein to polysaccharide content was increased after CPAM conditioning, which was beneficial to the improvement of sludge dewatering performance.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第S2期76-80,共5页
Environmental Science & Technology
基金
2017年大学生科研与创业行动计划项目(201710011008)
关键词
柠檬酸污泥
胞外聚合物
蛋白质
多糖
脱水性能
citric acid sludge
extracellular polymeric substance
proteins
polysaccharides
dewaterability
