Sulfide level in municipal sludge digesters affects microbial community response to long-chain fatty acid loads.

ABSTRACT:

Background

Waste lipids are attractive substrates for co-digestion with primary and activated sewage sludge (PASS) to improve biogas production at wastewater treatment plants. However, slow conversion rates of long-chain fatty acids (LCFA), produced during anaerobic digestion (AD), limit the applicability of waste lipids as co-substrates for PASS. Previous observations indicate that the sulfide level in PASS digesters affects the capacity of microbial communities to convert LCFA to biogas. This study assessed the microbial community response to LCFA loads in relation to sulfide level during AD of PASS by investigating process performance and microbial community dynamics upon addition of oleate (C_18:1) and stearate (C_18:0) to PASS digesters at ambient and eleva

SUBMITTER: Shakeri Yekta S 

PROVIDER: S-EPMC6825336 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature