Performance of a laboratory-scale membrane bioreactor consisting mixed liquor with aquatic worms under toxic conditions

被引：18

作者：

Navaratna, Dimuth ^{[1
]}

Shu, Li ^{[2
]}

Jegatheesan, Veeriah ^{[2
]}

机构：

[1] Victoria Univ, Coll Engn & Sci, Melbourne, Vic 8001, Australia

[2] Deakin Univ, Sch Engn, Geelong, Vic 3216, Australia

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 155卷

关键词：

Ametryn; Extra-cellular polymeric substances (EPS); Membrane bioreactor (MBR); Soluble microbial products (SMP); Worms; EXTRACELLULAR POLYMERIC SUBSTANCES; SOLUBLE MICROBIAL PRODUCTS; SLUDGE REDUCTION; WASTE-WATER; AMETRYN;

D O I：

10.1016/j.biortech.2013.12.061

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A laboratory scale membrane bioreactor (MBR) consisting of worms was operated for 214 days. The objective was to evaluate the treatment and operating performance of the MBR with and without the addition of Ametryn which is a toxic and persistent herbicide. Removal of Ametryn was doubled (up to 80%) in the MBR when the worms were present. Increased rate (2.5 kPa/day) of trans-membrane pressure (TMP) and low concentration of MLSS (5.5 g/L) were recorded when the worm population was high (80-100 worms per 70 mu L). Short-term critical flux values were increased from 7.5 to 15 and then to 30 L/m(2)/h when the worm numbers decreased from 90 to 35 and then to 18 per 70 mu L of mixed liquor respectively. Further, high levels of carbohydrate concentration of soluble microbial products (SMP) and smaller sludge floc-sizes were found when the worm numbers were high. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：41 / 49

页数：9