Long-term operation of a pilot scale anaerobic membrane bioreactor (AnMBR) for the treatment of municipal wastewater under psychrophilic conditions

Bioresource Technology
J GouveiaM Peña

Abstract

The performance of a pilot scale anaerobic membrane bioreactor (AnMBR), comprising an upflow anaerobic sludge blanket (UASB) reactor coupled to an external ultrafiltration membrane treating municipal wastewater at 18±2°C, was evaluated over three years of stable operation. The reactor was inoculated with a mesophilic inoculum without acclimation. The AnMBR supported a tCOD removal efficiency of 87±1% at hydraulic retention time (HRT) of 7h, operating at a volumetric loading rate (VLR) of between 2 and 2.5kgtCOD/m(3)d, reaching effluent tCOD concentrations of 100-120mg/L and BOD5 concentrations of 35-50mgO2/L. Specific methane yield varied from 0.18 to 0.23Nm(3)CH4/kgCODremoved depending on the recirculation between the membrane module and the UASB reactor. The permeate flow rate, using cycles of 15s backwash, 7.5min filtration, and continuous biogas sparging (40-60m/h), ranged from 10 to 14Lm(2)/h with trans-membrane pressure (TMP) values of 400-550mbar.

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Citations

Apr 15, 2016·Journal of Industrial Microbiology & Biotechnology·Vojtech KoubaJ Bartacek
Mar 30, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·L PelazM Fdz-Polanco
Aug 12, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·B DüppenbeckerP Cornel
Sep 28, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Rong ChenYu-You Li
Aug 14, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Susumu HasegawaHideto Matsuyama
Apr 26, 2019·The Science of the Total Environment·Federico FerrariMaite Pijuan

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