Abstract

Efficient treatment of swine wastewater at a high rate would facilitate the development of a sustainable pig industry. In this study, to investigate methane fermentation and membrane filtration performance, an anaerobic membrane bioreactor was operated under mesophilic conditions for 207 days during four stages, with a hydraulic retention time (HRT) decreasing from 5 to 3, 2, and 1 day, and a changing of solid retention time/hydraulic retention time (SRT/HRT) ratio from 18,18 to 8 and 3.2. The results showed that a higher volumetric methane production of 1.63 L/(L.d) and a lower VFAs concentration (<200 mg/L at stable stage) could achieved when the HRT was 1 day and SRT/HRT ratio was only 3.2. The specific methanogenic activity slightly decreased under the shorter HRT, and with SRT/HRT shortening, hydro-genotrophic Methanocorpusculum tended to dominate in bulk sludge while acetoclastic Methanosaeta dominated in the biofilm. Membrane fouling was observed after 4 months with a flux decline and a significant increase in trans-membrane pressure. A serial cleaning test indicated that organic pollutants contributed highly to the membrane fouling. (C) 2019 Published by Elsevier Ltd.

Keywords

AnMBR; Swine wastewater; Hydraulic retention time; Methanogenesis; Membrane fouling

Published in

Energy
2020, Volume: 193, article number: 116783
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Westerholm, Maria

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

Associated SLU-program

Food Waste


Sustainable Development Goals

Ensure availability and sustainable management of water and sanitation for all
Ensure sustainable consumption and production patterns


UKÄ Subject classification

Water Treatment


Publication identifier

DOI: https://doi.org/10.1016/j.energy.2019.116783

Permanent link to this page (URI)

https://res.slu.se/id/publ/104925