Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
4744862
Reference Type
Journal Article
Title
Effect of ammonia on methane production, methanogenesis pathway, microbial community and reactor performance under mesophilic and thermophilic conditions
Author(s)
Yang, Z; Wang, Wen; He, Y; Zhang, R; Liu, G
Year
2018
Is Peer Reviewed?
1
Journal
Renewable Energy
ISSN:
0960-1481
Volume
125
Page Numbers
915-925
DOI
10.1016/j.renene.2018.03.032
Web of Science Id
WOS:000433648500081
Abstract
The effects of ammonia on methane production, methanogenesis pathway, microbial community, and reactor performance were investigated in this study. More than 20% of methane production loss was observed in mesophilic and thermophilic reactors when the ammonia level exceeded 2 and 5 g NH4+N/L, respectively. The volatile fatty acid (VFA) data indicated that acetogenesis and methanogenesis are strongly influenced by ammonia inhibition under the mesophilic condition, while methanogenesis was mainly affected under thermophilic condition. No evident methanogenesis pathway shift was found in the mesophilic reactor, whereas the increase in NH4+-N concentration to more than 5 led to a clear shift from aceticlastic to complex and flexible pathways, thereby significantly enriching the hydrogenotrophic pathway in the thermophilic reactor. The function and response of the microbial community to ammonia inhibition were consistent despite the difference in population and diversity under mesophilic and thermophilic conditions. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords
Anaerobic digestion; Ammonia; Methanogenesis pathway; Mesophilic; Thermophilic
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity