摘要
应用磷酸铵镁化学沉淀方法降低生活垃圾渗滤液氨氮含量。研究结果表明:pH值在10时,氨氮去除率最佳,可达到98.3%。适宜的反应时间为15 min,氨氮去除率达87.0%。沉淀剂配比以1∶1∶1,1∶1∶1.2和1.2∶1∶1为宜,氨氮去除率大于98.0%。基于正交试验确定经济合理的工艺条件为:反应时间15 min,pH=10,n(Mg)∶n(N)∶n(P)=1∶1∶1。此条件下,进水TP 2.7 mg/L,出水TP15.0 mg/L,C∶N∶P接近100∶5∶1,合理添加了磷元素,符合后续生化处理的要求。
Reducing ammonia nitrogen from landfill leachate by magnesium ammonium phosphate chemical precipitation. The research result indicates that： when wastewater pH-value of 10, the best ammonia nitrogen removal rate reaches 98.3% . Ammonia nitrogen removal rate reached 87.0 % during the optium reaction time 15 min. Ammonia removal efficiency was more than 98 % when appropriate proportion of precipitant were 1： 1： 1,1： 1：1.2 and 1.2： 1： 1. On the basis of orthogonal design method, The determined economic and reasonable process conditions were that： reaction time of 15mins, pH volute of leachate 10, ratio of quantity of matter of Mg： N： P as 1 ： 1 ： 1. Under these con- ditions, total Phosphorusototal concentration of Influent was 2. 7 rag/L, effluent was 15.0 mg,/L, the ratio of C： N： P approx 100： 5： 1, appropriate addition of phosphorus element could met the re- quirements for the subsequent biochemical treatment.
出处
《广西大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第2期222-226,共5页
Journal of Guangxi University（Natural Science Edition）
基金
广西科学研究与技术开发计划项目(桂科攻0816002-5)
广西研究生教育创新计划资助项目(2008105930810M085)
关键词
垃圾渗滤液
MAP化学沉淀
氨氮
landfill leachate
MAP chemical precipitation
ammonium-nitrogen
