不同活性污泥胞外聚合物提取方法优化

发布时间：2018-05-08 13:04

本文选题：胞外聚合物(EPS) + 提取方法　；参考：《北京工业大学学报》2016年04期

【摘要】：活性污泥胞外聚合物(extracellular polymeric substances,EPS)是污水生物处理过程中污泥结构、脱水性能、絮凝性能以及沉降性能的重要决定因素,而提取方法不同EPS的剥离程度存在很大的差别.因此EPS提取方法的建立至关重要.采用6种方法提取不同污泥EPS,分析了不同污泥每g干污泥中分层EPS的质量及组成,并考察了污泥粒径及脱水性能与污泥EPS的关系.结果表明:不同工艺不同污泥每g干污泥中EPS质量不同;甲醛+Na OH法提取EPS效率高且对细胞破坏程度小,试验中不同污泥EPS提取量为15.88~39.30 mg;每g干污泥中黏液层EPS质量越高,蛋白质与多糖质量浓度之比越大,污泥脱水性能越差;污泥EPS的提取效率与污泥粒径存在一定的相关性,污泥粒径越大,提取效率越高.
[Abstract]:Extracellular polymeric (extracellular polymeric) is an important determinant of sludge structure, dewatering, flocculation and settling performance in the process of biological treatment of sewage. However, there are great differences in stripping degree among different EPS extraction methods. Therefore, the establishment of EPS extraction method is very important. Six methods were used to extract different sludge EPSs, the quality and composition of layered EPS in dry sludge per g of different sludge were analyzed, and the relationship between sludge particle size and dewatering performance and sludge EPS was investigated. The results showed that the quality of EPS was different in different sludge / g dry sludge, the extraction efficiency of EPS by formaldehyde NaOH method was high and the degree of cell damage was small, the EPS extraction quantity of different sludge was 15.88 ~ 39.30 mg / g, and the mass of EPS in mucus layer was higher per g dry sludge. The higher the ratio of protein to polysaccharide, the worse the sludge dewatering performance, the higher the sludge EPS extraction efficiency is, the higher the sludge particle size is.
【作者单位】：北京工业大学北京市污水脱氮除磷处理与过程控制工程技术研究中心北京市水质科学与水环境恢复工程重点实验室;
【基金】：国家自然科学基金资助项目(51478013) 住房和城乡建设部科学技术计划项目(2014-K7-022)
【分类号】：X703.1

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