中国生态农业学报（中英文）2022，Vol.30Issue(8)：1346-1354,9.DOI:10.12357/cjea.20210764
养殖废水中磷鸟粪石结晶法回收潜力及影响因子研究
The potential and the impact factors for phosphorus recovery from wastewater via struvite precipitation
摘要
Abstract
Phosphorous (P) is an essential nutrient for living organisms, and there is a concern regarding the challenges of both sup-ply uncertainty and the linked aquatic eutrophication. Phosphorus recovery through struvite precipitation technology has attracted much attention in research as it prevents eutrophication and forms a slow-release fertilizer that serves as an alternative source of P in both synthetic wastewater (SW) and real waste (RW). However, only inorganic soluble P is involved in the reaction. Therefore, the ratio of organic P, which is up to 30％–40％ of total P in real wastewater systems, leads to a variation of P recovery rates in practice. There is a lack of knowledge on the underlying differences and the factors causing the disparity in the P recovery, and few studies have attempted to quantify the gap in the P recovery rates of SW and RW. Data mining was conducted using 103 studies with 1186 observations to quantify the P recovery rate in SW and RW, establish the underlying factors affecting the P recovery, and derive solu-tions. Results showed that P recovery rate in SW (83.6％) was higher than that in RW (76.9％). A large variation in the P recovery rate (20.4％ to 99.9％) in RW was detected since it was more sensitive to pH and foreign ions, such as calcium. Magnesium and calcium were found to impact struvite crystallization; magnesium had a positive impact at a specific Mg:P ratio between 1 and 2, with SW being more sensitive, while calcium inhibited struvite formation. P precipitation is an abiotic process, and organic P concentration plays a crucial role in the total P recovery rate. Aeration played an important role in the mineralization of organic P. Therefore, sup-plying aeration at a flow rate of 6 L?min?1 was beneficial for both total and inorganic P recovery. Increasing the Mg:P ratio was not a crucial factor for P recovery in practice, but it significantly impacts the components of the precipitate.关键词
磷/回收/鸟粪石/无机合成废水/真实废水Key words
Phosphorus/Recovery/Struvite/Synthetic wastewater/Real wastewater分类
资源环境引用本文复制引用
Erick K.Mutai,王选,马林..养殖废水中磷鸟粪石结晶法回收潜力及影响因子研究[J].中国生态农业学报（中英文）,2022,30(8):1346-1354,9.基金项目
The study was supported by the National Natural Science Foundation of China(31872403),the Science and Technology Program of Hebei Province(20327301D),the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA28030302),the Youth Innovation Promotion Asso-ciation of Chinese Academy of Sciences(2021095),and Hebei Dairy Cattle Innovation Team of Modern Agroindustry Technology Research System(HBCT2018120206). （31872403）
