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Transiting from the inhibited steady-state to the steady-state through the ammonium bicarbonate mediation in the anaerobic digestion of low-C/N-ratio food wastes
Hao, Tianwei1; Xiao, Yihang1; Varjani, Sunita2
2022-03-23
Source PublicationBioresource Technology
ISSN0960-8524
Volume351
Abstract

The current study aimed to determine the effects of NH on anaerobic digestion (AD) metabolism and the feasibility of using NHHCO to improve methane production in an AD system when treating a low-C/N-ratio food waste (FW). Increasing the ammonium concentration (500–1000 mg NHCl-N/L) added into the AD system did not limit the methane production but caused the volatile fatty acid (VFA) accumulation, forming an “inhibited steady-state” system. The addition of 200 mg NHHCO-N/L increased methane yield by 20% by aiding the microbial oxidation of VFAs. The high acetate content (65–85%) and abundance of acetoclastic methanogens (Methanosaeta and Methanosarcina) indicated an efficient acetoclastic methanogenesis process, which was facilitated by NHHCO. The long-term operation of the AD system demonstrated that NHHCO, at a concentration of 200 mg N/L, was capable of forming an active buffer system with NH and VFAs, enhancing methane production (221 ± 86 mL/g VS).

KeywordAmmonia Nitrogen Anaerobic Digestion Buffer System Low C/n Ratio Methanogenesis “inhibited Steady-state”
DOI10.1016/j.biortech.2022.127046
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaAgriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS SubjectAgricultural Engineering ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS IDWOS:000806632100008
Scopus ID2-s2.0-85126898586
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorXiao, Yihang
Affiliation1.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China
2.Gujarat Pollution Control Board, Gandhinagar, Gujarat, 382 010, India
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Hao, Tianwei,Xiao, Yihang,Varjani, Sunita. Transiting from the inhibited steady-state to the steady-state through the ammonium bicarbonate mediation in the anaerobic digestion of low-C/N-ratio food wastes[J]. Bioresource Technology,2022,351.
APA Hao, Tianwei,Xiao, Yihang,&Varjani, Sunita.(2022).Transiting from the inhibited steady-state to the steady-state through the ammonium bicarbonate mediation in the anaerobic digestion of low-C/N-ratio food wastes.Bioresource Technology,351.
MLA Hao, Tianwei,et al."Transiting from the inhibited steady-state to the steady-state through the ammonium bicarbonate mediation in the anaerobic digestion of low-C/N-ratio food wastes".Bioresource Technology 351(2022).
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