Characteristics of Accumulated Organic Compounds and Their Control in the Activated Sludge Process with Ultrafiltration.
Characteristics of Accumulated Organic Compounds and Their Control in the Activated Sludge Process with Ultrafiltration.
复制标题
超滤活性污泥工艺中有机化合物的积累特征及其控制。
DOI：
10.2965/jswe.22.574
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Y. Magara
中科院分区：
文献类型：
--
作者：
K. Nishimura;K. Kawamura;Y. Magara
通过人工模拟污水处理试验，研究了超滤固液分离活性污泥工艺中可溶性有机物的积累特性。在一个实验（运行I）中，在整个实验期间使用一片超滤膜。然而，在另一个实验（运行II）中，在大约一个月后的实验第二阶段中，频繁更换超滤膜以控制化合物的积累。在更换膜和不更换膜的两种情况下，滤液的TOC浓度和E260值都增加到各自的最大值。而在运行II中，频繁更换膜后，TOC浓度和E260值下降，底物代谢的耗氧速率恢复到一定水平。大肠杆菌中进行了检测，以评估膜分离对肠道细菌生长的潜在影响。这些化合物具有缩短滞后时间和抑制最大生物量的作用。在对最大生长速率的作用上，有促进和抑制两类化合物。并且膜阻断了化合物的作用，抑制了最大生长速率和最大生物量，但一部分化合物通过膜的滞后时间缩短。
Characteristics of soluble organic compounds which were accumulated in the activated sludge process with ultrafiltration for solid-liquid separation were evaluated through bench-scale experiments of artificial wastewater treatment. In one experiment (Run I), a sheet of ultrafiltration membrane was used during the whole experiment. However, in the other experiment (Run II), frequent replacement of ultrafiltration membrane was performed to control the accumulation of the compounds in the second stage of the experiment after around one month.In the both cases with and without replacement of the membrane, TOC concentration and E260 value of the filtrate increased to each maximum value. However, in Run II with frequent replacement of the membrane, TOC concentration and E260 value decreased, and oxygen uptake rate for substarate metabolism was recovered to a certain level.In Run I without replacement of the membrane, effects of the organic compounds on the growth of E. coli was examined to evaluate the potential effects of membrane separation on the growth of enteric bacteria. Those compounds had the actions to shorten a lag time and to suppress maximum biomass. As for the actions to maximum growth rate, there were two groups of compounds which accelerate and suppress. And the membrane blocked the compounds to suppress maximum growth rate and maximum biomass, but a portion of the compounds to shorten lag time passed through the membrane.