| 污泥中蛋白质和多糖的分布对脱水性能的影响 |
| 摘要点击 3195 全文点击 3484 投稿时间：2007-11-04 修订日期：2007-12-23 |
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| 中文关键词 污泥 蛋白质 多糖 脱水性能 胞外聚合物 |
| 英文关键词 sewage sludge proteins polysaccharides dewaterability extracellular polymeric substances |
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| 中文摘要 |
| 为研究污泥中蛋白质和多糖的组成及空间分布对污泥可脱水性的影响，采用高温（55℃）及pH 10.0和pH 5.5控制条件，进行污泥水解酸化试验；通过离心和超声波法，对污泥中蛋白质和多糖在污泥粘液层、松散附着胞外聚合物层、紧密粘附胞外聚合物层及细胞相层的分布，并对污泥脱水性能（以毛细吸水时间表征）作了跟踪监测.结果表明，污泥中蛋白质和多糖主要分布在细胞相层.在酸性条件下（pH 5.5），污泥高温水解酸化（第0～15 d）使其毛细吸水时间比原污泥稍大，而最终（第20 d）稍低；在碱性条件下（pH 10.0）的污泥水解酸化，则使污泥毛细吸水时间远大于原污泥.统计分析结果表明，污泥脱水性能主要受粘液层的可溶性蛋白质和蛋白质/多糖影响，几乎不受污泥中的蛋白质、多糖和蛋白质/多糖及其它EPS层中的化学组分的影响. |
| 英文摘要 |
| The thermophilic (55℃) hydrolysis and acidification were conducted in order to investigate the composition and distribution of proteins and polysaccharides and the effect of them on dewaterability of sludge. Sludge flocs were divided into four layers by centrifuge and ultrasound, i.e., slime, loosely bound-extracellular polymeric substances (LB-EPS), tightly bound-EPS (TB-EPS) and cells (Pellet). Results showed that most of proteins and polysaccharides located in pellet. Capillary suction time (CST) during digestion at pH 5.5 was slightly higher than the raw sludge, while CST during digestion at pH 10.0 was markedly higher than the raw sludge. Statistical analysis suggested that CST was affected by soluble proteins and soluble proteins/polysaccharides and virtually no affected by proteins, polysaccharides or proteins/polysaccharides in sludge and other layers except slime. |
