期刊
BIORESOURCE TECHNOLOGY
卷 363, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127957
关键词
Anaerobic digestate; Ammonia recovery; Vacuum ammonia stripping; Mass transfer; Economic analysis
资金
- National Natural Science Foundation of China (NSFC) [52131002]
- National Key Research and Development Program of China [2020YFC1908702]
This review highlights the importance of ammonia recovery technologies in reducing nitrogen pollution, conserving energy, and reducing greenhouse gas emissions. The mechanisms, influencing factors, mass transfer processes, and economic analysis of ammonia recovery are critically reviewed.
Nitrogen-containing wastewater and organic wastes are inevitably produced during human activities. To reduce nitrogen pollution, much energy has been used to convert ammonia nitrogen into nitrogen gas through biological nitrogen removal method. However, it needs to consume high energy again during industrial nitrogen fixation, which give rise to massive greenhouse gas (GHG) emissions. Therefore, ammonia recovery from organic wastes has attracted much attention in recent years. In this review, the advantages and disadvantages of ammonia stripping, membrane separation and struvite precipitation are discussed firstly. The ammonia stripping mecha-nisms, influencing factors, mass transfer process, and the latest innovative ammonia stripping techniques from the anaerobic digestate of organic wastes are critically reviewed. Additionally, a comprehensive economic analysis of different ammonia removal or recovery processes is carried out. The challenges and prospects of ammonia recovery are suggested. Ammonia recovery is of great significance for promoting nitrogen cycle, energy saving and GHG emission reduction.
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