膜生物反应器处理合成中水时的氧传递

Oxygen transfer in membrane bioreactors treating synthetic greywater.

作者信息

Henkel Jochen, Lemac Mladen, Wagner Martin, Cornel Peter

机构信息

Technische Universität Darmstadt, Institut WAR, Section: Wastewater Technology, Petersenstrasse 13, 64287 Darmstadt, Germany.

出版信息

Water Res. 2009 Apr;43(6):1711-9. doi: 10.1016/j.watres.2009.01.011. Epub 2009 Jan 29.

DOI:10.1016/j.watres.2009.01.011

PMID:19217638

Abstract

Mass transfer coefficients (k(L)a) were studied in two pilot scale membrane bioreactors (MBR) with different setup configurations treating 200L/h of synthetic greywater with mixed liquor suspended solids' (MLSS) concentrations ranging from 4.7 to 19.5g/L. Besides the MLSS concentration, mixed liquor volatile suspended solids (MLVSS), total solids (TS), volatile solids (VS), chemical oxygen demand (COD) and anionic surfactants of the sludge were measured. Although the pilot plants differed essentially in their configurations and aeration systems, similar alpha-factors at the same MLSS concentration could be determined. A comparison of the results to the published values of other authors showed that not the MLSS concentration but rather the MLVSS concentration seems to be the decisive parameter which influences the oxygen transfer in activated sludge systems operating at a high sludge retention time (SRT).

摘要

在两个中试规模的膜生物反应器（MBR）中研究了传质系数（k(L)a），这两个反应器具有不同的设置配置，处理流量为200L/h的合成灰水，混合液悬浮固体（MLSS）浓度范围为4.7至19.5g/L。除了MLSS浓度外，还测量了混合液挥发性悬浮固体（MLVSS）、总固体（TS）、挥发性固体（VS）、化学需氧量（COD）和污泥中的阴离子表面活性剂。尽管中试装置在其配置和曝气系统上有本质差异，但在相同的MLSS浓度下可以确定相似的α因子。将结果与其他作者发表的值进行比较表明，似乎不是MLSS浓度，而是MLVSS浓度才是影响在高污泥停留时间（SRT）下运行的活性污泥系统中氧传递的决定性参数。