Cassini S T, Andrade M C E, Abreu T A, Keller R, Gonçalves R F
Department of Environmental Engineering, Universidade Federal do Espirito Santo UFES, 29060-900 Vitoria ES, Brazil.
Water Sci Technol. 2006;53(8):51-8. doi: 10.2166/wst.2006.235.
Sludge samples from an upflow anaerobic sludge blanket (UASB) reactor and four submerged aerated biofilters (BFs) of a wastewater treatment plant (1,000 inhab.) were processed at bench scale by alkaline and acid hydrolysis with the objective to evaluate the organic matter solubilization, volatile solids (VS) destruction and the effect of hydrolytic processes on the extracellular polymeric substances (EPS) fraction of the sludge samples. The results showed that alkaline hydrolysis of sludge samples treatment with 1.0% total solids (TS) using NaOH 20 meq L(-1) was more efficient on organic matter solubilization and VS destruction than acid hydrolysis. The EPS sludge content was also affected by the alkaline treatment of anaerobic sludge samples. The EPS concentrations (mg EPS/gVSS) on the anaerobic sludge after the alkaline treatment were significantly lowered according to sample height in the UASB reactor. Data indicated that the EPS sludge fraction is the main component affected by the alkaline hydrolytic process of anaerobic sludge samples.
从一座污水处理厂（服务人口1000人）的上流式厌氧污泥床（UASB）反应器和四个淹没式曝气生物滤池（BF）采集污泥样本，在实验室规模下通过碱解和酸解进行处理，目的是评估有机物的溶解、挥发性固体（VS）的破坏以及水解过程对污泥样本中胞外聚合物（EPS）部分的影响。结果表明，使用20 meq L(-1)的NaOH对总固体含量（TS）为1.0%的污泥样本进行碱解，在有机物溶解和VS破坏方面比酸解更有效。厌氧污泥样本的碱处理也会影响EPS污泥含量。根据UASB反应器中样本高度，碱处理后厌氧污泥上的EPS浓度（mg EPS/gVSS）显著降低。数据表明，EPS污泥部分是受厌氧污泥样本碱水解过程影响的主要成分。
