Investigation on the response of anaerobic membrane bioreactor to temperature decrease from 25°C to 10°C in sewage treatment

Ryoya Watanabe; Yulun Nie; Shinichiro Wakahara; Daisuke Komori; Yu-You Li

doi:10.1016/j.biortech.2017.07.001

Investigation on the response of anaerobic membrane bioreactor to temperature decrease from 25°C to 10°C in sewage treatment

Bioresour Technol. 2017 Nov:243:747-754. doi: 10.1016/j.biortech.2017.07.001. Epub 2017 Jul 4.

Authors

Ryoya Watanabe¹, Yulun Nie², Shinichiro Wakahara³, Daisuke Komori⁴, Yu-You Li⁵

Affiliations

¹ TAISEI Corporation, 344-1, Nase-cho, Totsula-ku, Yokohama 245-0051, Japan.
² Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi 980-8579, Japan; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China.
³ KUBOTA Corporation, 1-1-1 Hama, Amagasaki, Hyogo 661-8567, Japan.
⁴ Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi 980-8579, Japan.
⁵ Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi 980-8579, Japan. Electronic address: gyokuyu.ri.a5@tohoku.ac.jp.

PMID: 28711803
DOI: 10.1016/j.biortech.2017.07.001

Abstract

Anaerobic membrane bioreactor (AnMBR) for sewage treatment was operated for 650days with the decrease of temperature from 25°C to 10°C. At higher temperature >15°C, COD removal was above 94% while sewage treatment efficiency and relevant CH₄ production decreased below 15°C. The effluent COD at 10°C was 134mg/L at HRT of 16h. Moreover, low temperature can result in a higher membrane fouling rate due to the microbial self-protection behavior in coping with the temperature decrease by releasing soluble microbial products (SMP) and extracellular polymeric substances (EPS). The contribution of pore blocking to membrane fouling caused by protein from SMP and EPS increased from 17% to 45% and that of cake layer decreased from 81% to 53% at 25°C and 15°C respectively. The inhibition to hydrolysis and acidification process was responsible to the decrease of sewage treatment at lower temperature.

Keywords: 16S rRNA; AnMBR; Response; Sewage treatment; Temperature.

MeSH terms

Anaerobiosis
Bioreactors*
Membranes, Artificial
Sewage*
Temperature

Substances

Membranes, Artificial
Sewage