摘要
过低的有机物——污泥负荷(<0.1gCODcr/gMLSS.d)使膜生物反应器内的活性污泥进入内源呼吸阶段,污泥负增长,活性变差。上清液CODcr多糖含量明显高于进水和出水,是微生物代谢物质在膜前积累所致。溶解性微生物产物容易被膜表面吸附形成凝胶层,导致过滤阻力增加,引起膜污染,并抑制微生物活性。浓度较低、活性较差的微生物对溶解性微生物产物的吸附和降解能力较弱。
The low organic loading, that is, F/M〈0.1 g CODα/gMLSS·d, could bring the activated sludge in the Membrane Bioreactor（MBR） into endogenesis respiration. The sludge concentration decreased and the sludge activity deteriorated. The CODcr and polysaccharide concentrations in the reactor were obviously higher that those in the influent and effluent, which was caused by microbial accumulation before membrane filtration. The soluble microbial products were easy to be absorbed by the membrane surface to form a gel layer, which could induce the increase of trans-membrane pressure, causing membrane fouling, and inhibiting the activities of the microbial. Low concentration microorganisms with low activities have a weak absorption and degradation ability for Soluble Microbial Products（SMP）.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第3期479-482,共4页
Periodical of Ocean University of China
基金
山东省环境保护重点科技项目([2004]005-1)资助
