鸟粪石法同步回收发酵液中高质量浓度氮磷  

Simultaneous recovery of nitrogen and phosphorus in fermentive liquid by strutive precipitation

作　　者：杨雪[1] 万春黎[2] 杜茂安[1] 李观元[1] 万芳[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]复旦大学环境科学与工程系,上海200433

出　　处：《哈尔滨商业大学学报（自然科学版）》2013年第1期36-39,45,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：国家重大水专项(2008ZX07211-007)

摘　　要：以剩余污泥碱性发酵液为研究对象,考察鸟粪石沉淀法(MAP法)同时回收氮磷的最佳条件及对发酵液中有机物的影响.正交试验结果表明,分别以氨氮(NH4+—N)和正磷酸盐(PO43-—P)回收率为考察标准,四个环境因素的显著性分别依次为:nP∶nN>pH>反应时间>nMg∶nP、pH>nMg∶nP>nP∶nN>反应时间.各个环境因素的优化分析结果表明,最佳的回收条件为:pH=10.0、nMg∶nP=1.8、nP∶nN=1.6、反应时间为5 min,此时NH4+—N和的PO43-—P回收率分别为62.3%和94.1%,同时发酵液中的有机物随着鸟粪石沉淀的析出也略有减少.This paper studied the optimal conditions of simultaneous recovery of nitrogen and phosphorus in anaerobic fermentative liquid by magnesium ammonium phosphate precipitation （MAP） , and discussed the effects of MAP precipitation on organics. The orthogonal experi- ments showed that the effects of four operational factors were different for NH4 ＋ -N and pQ3- p recovery. For NH4 ＋--N recovery, the operational factors were as follow：np： nN 〉 pH 〉 time 〉 nMg： np, and for PO43-P recovery, the operational factors were as follow： pH 〉 rims： np〉 rip： nN 〉 time. The optiming experiments indicated that the best conditions were as follow： the pH was 10.0,riMs：/l,p the was 1.8, the np： nN was 1.6, and the reaction time was 5 min. Adopting these conditions, the recovery efficiency of NH4 ＋ -N and PO43- -P was 62.3 % and 94.1%, respectively. Then, the concentrations of organics in fermentative liquid were slightly decreased.

关 键 词：鸟粪石 剩余污泥 发酵液 氮磷回收 

分 类 号：X172[环境科学与工程—环境科学]