Towards integrated operation of membrane bioreactors: Effects of aeration on biological and filtration performance

被引：33

作者：

Dalmau, M. ^{[1
]}

Monclus, H. ^{[1
]}

Gabarron, S. ^{[1
]}

Rodriguez-Roda, I. ^{[1
,2
]}

Comas, J. ^{[1
]}

机构：

[1] Univ Girona, Inst Environm, LEQUiA, E-17071 Girona, Spain

[2] Univ Girona, Catalan Inst Water Res Sci & Technol Pk, ICRA, E-17003 Girona, Spain

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 171卷

关键词：

Biological nutrient removal; Fouling; Membrane bioreactors; Aeration; Energy savings; WATER TREATMENT PLANTS; PHOSPHORUS REMOVAL; MODEL; NITRIFICATION; OPTIMIZATION; MUNICIPAL; MBR;

D O I：

10.1016/j.biortech.2014.08.031

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Two experimental studies evaluated the effect of aerobic and membrane aeration changes on sludge properties, biological nutrient removal and filtration processes in a pilot plant membrane bioreactor. The optimal operating conditions were found at an aerobic dissolved oxygen set-point (DO) of 0.5 mg O-2 L-1 and a membrane specific aeration demand (SAD(m)) of 1 mh(-1), where membrane aeration can be used for nitrification. Under these conditions, a total flow reduction of 42% was achieved (75% energy reduction) without compromising nutrient removal efficiencies, maintaining sludge characteristics and controlled filtration. Below these optimal operating conditions, the nutrient removal efficiency was reduced, increasing 20% for soluble microbial products, 14% for capillarity suction time and reducing a 15% for filterability. Below this DO set-point, fouling increased with a transmembrane pressure 75% higher. SAD(m) below 1 m h(-1) doubled the values of transmembrane pressure, without recovery after achieving the initial conditions. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：103 / 112

页数：10