Indexed by:Journal Papers

Date of Publication:2019-10-20

Journal:JOURNAL OF CLEANER PRODUCTION

Included Journals:EI、SCIE

Volume:235

Page Number:943-952

ISSN No.:0959-6526

Key Words:Forward osmosis membrane; Anaerobic bioreactor; Dissolved methane; Methane yield

Abstract:This paper focuses on the properties and mechanism of dissolved gases permeate membrane and energy recovery efficiency in the anaerobic forward osmosis membrane bioreactor under different membranes types (CTA-ES and CTA-NW), membrane orientations, temperatures (25 degrees C and 35 degrees C) and influent COD concentrations (3000 mg/L,6000 mg/L and 9000 mg/L). CTA membrane allowed the permeation of dissolved H-2, and the concentration of dissolved H-2 in the draw side (between 2.4 mg/L and 4.2 mg/L) was higher than the feed side (between 1 mg/L and 3.4 mg/L). This was beneficial to the anaerobic digestion because the partial pressure of H-2 in the reactor was reduced. A small amount of dissolved CO2 (around 7 mg/L in draw side while between 56 mg/L and 256 mg/L in feed side) was allowed to pass through the CTA membrane. CTA membrane nearly 100% blocks the permeation of dissolved CH4 at different operation conditions in this paper. The highest methane yield was 0.256 L CH4/g COD at 35 degrees C with the influent COD was 6000 mg/L. This showed that AnOMBR could solve the problem of effluent containing dissolved methane in conventional anaerobic treatment, and had great potential in energy recovery. (C) 2019 Elsevier Ltd. All rights reserved.