Effects of mixed liquor suspended solid concentrations on membrane bioreactor efficiency for treatment of food industry wastewater

• Main Authors: Saed, Katayon, Megat Mohd Noor, Megat Johari, Jusoh, Ahmad, Abdullah, Abdul Ghani Liew, Nagaoka, Hiroshi, Aya, Hidenori
• Format: Article
• Language: English
• Published: Elsevier 2004
• Online Access: http://psasir.upm.edu.my/id/eprint/14391/1/Effects%20of%20mixed%20liquor%20suspended%20solid%20concentrations%20on%20membrane%20bioreactor%20efficiency%20for%20treatment%20of%20food%20industry%20wastewater.pdf; http://psasir.upm.edu.my/id/eprint/14391/; https://www.sciencedirect.com/science/article/pii/S0011916404003662#!

This study investigated the impact of mixed liquor suspended solid (MLSS) concentrations on the performance of a membrane bioreactor for treating food industry wastewater. The membrane bioreactor was mainly made up of an activated sludge reactor and microfiltration hollow-fibre membrane. Two experimental procedures consisting of low and high MLSS concentrations were set up. The process at low MLSS concentrations provided a higher degree of treatment in terms of suspended solids (99.2%) and turbidity (99.73%) removals. The mean flux value of process at low MLSS concentrations (5.03 L/m2.h) was found higher than those at high MLSS concentrations (2.27 L/m2.h). Furthermore, the effectiveness of MLSS concentrations was greatly influenced by the position of the membrane modules. Higher turbidity and suspended solids removals and higher flux values were obtained with a horizontally positioned membrane module compared to a vertically placed membrane module.