【摘要】 对比分析有色冶金生产过程产出的中低浓度氨氮废水处理技术,利用实验室小试考察了吹脱法、折点氯化法、药剂沉淀法和光催化技术脱除废水中氨氮的效果。结果表明,采用光催化技术处理废水,氨氮脱除率为90%～99%。在此基础上开发了一套能力为40m~3/d错流式光催化有色金属氨氮废水处理装置,将此工艺及装备用于处理氨氮浓度为266.74～1 509.79 mg/L的实际工业废水,处理后废水中氨氮含量小于20mg/L,脱除率平均为72%,最高达到93.3%。更多还原

【Abstract】 Several treatment technologies for conventional low concentration ammonia nitrogen wastewater from nonferrous metallurgy production were reviewed and compared.Removal of ammonia nitrogen from wastewater by air stripping,fold point chlorination process,chemical precipitation,and photocatalysis was studied in lab scale.The results show that removal rate of ammonia nitrogen wastewater is 90%-99%treated by photocatalysis technology.Based on this result,a set of device with capacity of 40 m~3/d to treat ammonia nitrogen wastewater with concentration of 266.74-1 509.79 mg/L by photocatalysis is developed.After treatment,ammonia nitrogen content in wastewater is 20 mg/L below with removal rate of 72% on average and 93.3% at the highest.更多还原