Effluent solids recirculation to municipal sludge digesters enhances long-chain fatty acids degradation capacity.

ABSTRACT:

Background

Slow degradation kinetics of long-chain fatty acids (LCFA) and their accumulation in anaerobic digesters disrupt methanogenic activity and biogas production at high loads of waste lipids. In this study, we evaluated the effect of effluent solids recirculation on microbial LCFA (oleate) degradation capacity in continuous stirred-tank sludge digesters, with the overall aim of providing operating conditions for efficient co-digestion of waste lipids. Furthermore, the impacts of LCFA feeding frequency and sulfide on process performance and microbial community dynamics were investigated, as parameters that were previously shown to be influential on LCFA conversion to biogas.

Results

Effluent solids recirculation to municipal sludge digesters enabled biogas production o

SUBMITTER: Shakeri Yekta S 

PROVIDER: S-EPMC7934545 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature