Journal article
Closing ammonia loop in efficient biogas production: Recycling ammonia pretreatment of wheat straw
Biosystems engineering, Vol.180, pp.182-190
04/2019
Handle:
https://hdl.handle.net/2376/108897
Abstract
We propose an integrated system for simultaneous ammonia recovery, ammonia pretreatment, biogas upgrading, and fertiliser production in biogas production. Ammonia stripping and absorbing played an important role as they significantly affected the ammonia recovery and biogas upgrading performance. Ammonia stripping with biogas was used to remove ammonia from biogas slurry at various conditions. The ammonia removal efficiency reached 99.30% at 10% CO2 content, 90 °C and 6 h stripping time. Ammonia absorption of ammonia-bearing biogas achieved crystalline ammonium and biogas upgrading. The obtained crystalline ammonium was used for recovering ammonia. The ammonia pretreatment and anaerobic digestion results showed that wheat straw pretreated with 0.70% ammonia concentration and 105 °C obtained the highest biogas yield of 538.1 mL g−1, which was 31.9% higher than untreated wheat straw. The process in this study shows a great potential in biogas production by recycling ammonia for pretreatment of feedstocks and biogas purification associated with producing fertilisers.
•Proposed an integrated system, including ammonia pretreatment and ammonia recovery.•Obtained the crystalline ammonium bicarbonate by ammonia stripping and absorbing.•Ammonia is used for both pretreatment of feedstocks and biogas purification.•The maximum biogas yield of 538.1 mL g−1 was 31.9% higher than control.
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Details
- Title
- Closing ammonia loop in efficient biogas production: Recycling ammonia pretreatment of wheat straw
- Creators
- Dianlong Wang - School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, ChinaYa Xin - School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, ChinaHao Shi - School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, ChinaPing Ai - College of Engineering, Huazhong Agricultural University, Wuhan, 430070, ChinaLiang Yu - Department of Biological Systems Engineering, Washington State University, Pullman, WA, 99164, USAXiangqian Li - School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, ChinaShulin Chen - Department of Biological Systems Engineering, Washington State University, Pullman, WA, 99164, USA
- Publication Details
- Biosystems engineering, Vol.180, pp.182-190
- Publisher
- Elsevier Ltd
- Identifiers
- 99900583062901842
- Language
- English
- Resource Type
- Journal article