title: Influence of process parameters on phosphorus recovery by struvite formation from urine.
abstract: Batch experiments were conducted to examine the influence of various process parameters on phosphorus (P) recovery by struvite formation from urine. The results showed that the Mg/P molar ratio is one of the most important parameters affecting P recovery. The Mg/P molar ratio of 1.3 was found the most reasonable for struvite formation, and the P removal efficiency reached more than 96.6%. An increase in pH of urine solutions from 8.7 to 10.0 did not significantly affect P removal, but the quality of crystal formed at pH 10.0 was poor based on scanning electron microscopy analysis. A longer mixing time positively affected struvite formation, and compared to without mixing, the P removal efficiency increased from 72.7 to 97.3% after 5 min of mixing. The addition of seed material had no influence on the P removal efficiency, but contributed to the formation of struvite clusters.
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Xiaoning
authors: X
authors: Liu
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Zhengyi
authors: Z
authors: Hu
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Chunyou
authors: C
authors: Zhu
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Guoqi
authors: G
authors: Wen
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Xianchao
authors: X
authors: Meng
authors: College of Resources and Environment, University of Chinese Academy of Sciences, 19A, Yuquan Road, Shijingshan District, Beijing 100049, China E-mail: zhyhu@ucas.ac.cn.
authors: Jia
authors: J
authors: Lu
mesh_terms: D017616:Magnesium Compounds / Q000138:chemical synthesis*; D010710:Phosphates / Q000138:chemical synthesis*; D010758:Phosphorus / Q000302:isolation & purification*; D000069877:Struvite; D014556:Urine / Q000737:chemistry*
chemical_list: D017616:Magnesium Compounds; D010710:Phosphates; D010758:Phosphorus; D000069877:Struvite