摘要
生物质煤气废水是一种新出现的高浓度氨氮有机废水。作者采用化学沉淀法去除该废水中的氨氮,研究了不同沉淀剂、pH、温度和搅拌时间对氨氮去除效果的影响。结果表明,MgCl2+Na3PO4·12H2O明显优于其他沉淀剂组合。当n(Mg2+)∶n(NH4+)∶n(PO43-)=1∶1∶1、pH10.0、温度30℃、搅拌时间30min时,废水中的氨氮质量浓度从处理前的222mg/L降到17mg/L,去除率为92.3%。
The biomass gasification wastewater is a new type of organic wastewater with high concentration ammonianitrogen. In order to remove ammonia-nitrogen from this wastewater,chemical precipitation process has been carried out. The effects of the different types and dosage of precipitants,pH, temperature and stirring time on the removal of ammonia-nitrogen are investigated. The results show that MgCl2＋Na3PO4·12H2O is significantly better than other combination. When n（Mg^2＋）：n（NH4^＋） ：n（PO4 ^3-） is 1：1：1 ,pH is 10.0,temperature is 30 ℃ and stirring time is 30 min, after the wastewater,whose ammonia-nitrogen contents was 222 mg/L,was treated, the ammonia- nitrogen content goes down to 17 mg/L,and the removal rate of ammonia-nitrogen is 92.3%.
出处
《工业水处理》
CAS
CSCD
北大核心
2007年第4期51-54,共4页
Industrial Water Treatment
基金
国家"十五"科技攻关项目(2002BA40302)
北京市自然科学基金项目(502003)
关键词
化学沉淀
生物质气化
洗焦废水
氨氮去除
chemical precipitation
biomass gasification
coke-washing wastewater
removal of ammonia-nitrogen
