在膜生物反应器与射流湍流臭氧接触器联合使用中，破碎污泥循环对膜渗透性能的影响。

Effect of disintegrated sludge recycling on membrane permeability in a membrane bioreactor combined with a turbulent jet flow ozone contactor.

机构信息

School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea.

出版信息

Water Res. 2010 Mar;44(6):1833-40. doi: 10.1016/j.watres.2009.12.009. Epub 2009 Dec 16.

DOI:10.1016/j.watres.2009.12.009

PMID:20092865

Abstract

We have combined a turbulent jet flow ozone contactor (TJC) with a membrane bioreactor (MBR) to establish a zero-discharge system in terms of excess sludge in the MBR. The TJC-MBR system was compared with the conventional MBR (Control-MBR) with respect to i) the size and zeta potential of the sludge particles, ii) the loosely bound extra-cellular polymeric substances (EPSs) and tightly bound EPS of the microbial flocs, iii) the porosity and biovolume of the bio-cake accumulated on the membrane, and iv) the membrane permeability. The TJC system generated the ozonated sludge with a negligible amount of loosely bound EPS and a positive zeta potential. As a result, when such ozonated sludge was recycled, the average size of the sludge particles (e.g., microbial flocs) increased in the TJC-MBR. Consequently the bio-cake formed in the TJC-MBR had greater porosity than that in the Control-MBR, giving rise to higher membrane permeability in the TJC-MBR.

摘要

我们将湍流传质射流臭氧接触器（TJC）与膜生物反应器（MBR）相结合，在 MBR 中建立了一个关于剩余污泥的零排放系统。TJC-MBR 系统在以下方面与传统的 MBR（Control-MBR）进行了比较：i）污泥颗粒的大小和 ζ 电位，ii）微生物絮体的松散结合的胞外聚合物物质（EPS）和紧密结合的 EPS，iii）在膜上积累的生物膜的孔隙率和生物体积，以及 iv）膜的渗透性。TJC 系统生成了具有可忽略量的松散结合的 EPS 和正 ζ 电位的臭氧化污泥。因此，当这种臭氧化污泥被回收利用时，TJC-MBR 中的污泥颗粒（例如微生物絮体）的平均尺寸会增加。因此，在 TJC-MBR 中形成的生物膜具有比 Control-MBR 更大的孔隙率，从而导致 TJC-MBR 中的膜渗透性更高。