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| Current research status and perspectives on liquid organic fertilizer utilization based on concentrating biogas slurry |
| Received:August 31, 2021 |
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| KeyWord:biogas slurry;membrane concentration;fertilization |
| Author Name | Affiliation | E-mail | | CUI Wenjing | College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LI Shiyu | College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LI Guoxue | College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | CHEN Qing | College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | LI Yun | College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China | | | ZHANG Bangxi | Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China | | | LUO Wenhai | College of Resources and Environment, China Agricultural University, Beijing 100193, China | luowenhai@cau.edu.cn |
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| Abstract: |
| Anaerobic digestion is an effective technique for treatment and resourceful utilization of organic wastes. However, treatment and utilization of biogas slurry is a substantial hurdle to further development of anaerobic digestion. Biogas slurry is rich in nutrients and active substances and can thereby be used as liquid organic fertilizer in agricultural production. Within the constraints of farmland carrying capacity and transportation costs, techniques for concentrating biogas slurry have been developed. Concentrating biogas slurry can reduce storage and transportation costs, and considerably increase unit nutrient content in high-quality organic fertilizer, and the separated water can be reused or discharged to suit local standards. This article discussed the advantages and disadvantages of different technologies for biogas slurry concentration and the potential for subsequent liquid fertilizer production. Perspectives regarding future advances in concentrating biogas slurry were also provided. |
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