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Research article - Peer-reviewed, 2022

Upgrading the performance of high solids feeding anaerobic digestion of chicken manure under extremely high ammonia level

Song, Yapeng; Hu, Wanrong; Qiao, Wei; Westerholm, Maria; Wandera, Simon M.; Dong, Renjie


Biogas production using high solids feeding anaerobic digestion has several benefits, including higher treatment capacity, lower energy requirements, and reduced volume of digestate. However, when chicken manure is used as a substrate, the process is prone to reactor instability due to ammonia inhibition. This study investigated the performance of three laboratory-scale anaerobic systems fed by chicken manure with total solids (TS) up to 15%, giving rise to total ammonia nitrogen (TAN) concentration of 7.5 g/L. The tolerance of the anaerobic system to ammonia inhibition was evaluated by operating three organic loading rates (OLR) in the range of 1.5-4.5 g-volatile solids (VS)/(L center dot d). The results showed that methane yield reached 0.33 L/g center dot VS under an OLR of 1.5 g-VS/(L center dot d), comparable to conventional wet-type process performance. The total volatile fatty acids (VFAs) were below 0.5 g/L, indicating a highly acceptable performance. The digestive performance deteriorated when the OLR was increased to 4.5 g-VS/(L center dot d) and highlighted the importance of selecting an appropriate OLR. The result may support the adoption of high solids feeding anaerobic treatment for nitrogen-rich materials. (c) 2022 Elsevier Ltd. All rights reserved.


Anaerobic digestion; High solids feeding; Chicken manure; Ammonia inhibition; Organic loading rates

Published in

Renewable Energy
2022, volume: 194, pages: 13-20

Authors' information

Song, Yapeng
China Agricultural University
Hu, Wanrong
China University of Geosciences
Qiao, Wei
China Agricultural University
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Wandera, Simon M.
Jomo Kenyatta University of Agriculture and Technology
Dong, Renjie
China Agricultural University

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