李倩 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Bioresource Technology

Key Words:

中文关键字：Anaerobic co-digestion Coffee grounds Thermophilic，英文关键字：Anaerobic co-digestion Coffee grounds Thermophilic

Abstract:

This study was conducted to investigate the effects of sulfate on propionate degradation and higher organic loading rate (OLR) achievement in a thermophilic AnMBR for 373 days using coffee grounds, milk and waste activated sludge (WAS) as the co-substrate. Without the addition of sulfate, the anaerobic system failed at an OLR of 14.6 g-COD/L/d, with propionate accumulating to above 2.23 g-COD/L, and recovery by an alkalinity supplement was not successful. After sulfate was added into substrates at a COD/SO42 ratio of 200:1 to 350:1, biogas production increased proportionally with OLR increasing from 4.06 to 15.2 g-COD/L/d. Propionic acid was maintained at less than 100 mg-COD/L due to the effective conversion of propionic acid to methane after the sulfate supplement was added. The long-term stable performance of the AnMBR indicated that adding sulfate was beneficial for the degradation of propionate and achieving a higher OLR under the thermophilic condition.

Note:

王晓昌

Co-author:

李玉友,乔伟,KazuyukiTakayanagi

First Author:

王晓昌,liqian

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：185

Page Number:

页：308~315

Translation or Not:

no

Date of Publication:

2015-03-01