Sammanfattning

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.

Nyckelord

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

Publicerad i

Energy
2020, Volym: 193, artikelnummer: 116783
Utgivare: PERGAMON-ELSEVIER SCIENCE LTD

SLU författare

• Westerholm, Maria

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

Associerade SLU-program

Food Waste


Globala målen

SDG6 Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla
SDG12 Säkerställa hållbara konsumtions- och produktionsmönster


UKÄ forskningsämne

Vattenbehandling


Publikationens identifierare

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

Permanent länk till denna sida (URI)

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