摘要
研究闭路循环吹脱—盐酸液吸收—折点加氯法联合处理中高浓度工业氨氮废水工艺。吹脱段pH值控制在 11,氧化段pH值在 7左右 ,喷淋强度控制在 2 5～ 3 5m3/(m2 h) ,气液比应控制在 30 0 0m3/m3左右 ,氨以氯化铵回收 ,出水NH4+及Mn2 +离子均低于GB8978 1996《污水综合排放标准》
The comprehensive process of ammonia nitrogen wastewater treatment and ammonia recovery by ammonia closed circuit stripping chlorhydric acid absorption oxidation by chlorine dioxide is investigated The ammonia is recovered as ammonium chloride and the content of NH 4 + and Mn 2+ in the drainage is consonant with the GB8978 1996 standard under the condition of pH=11 in stripping, pH=7 in oxidation, the spray intensity of 2 5～3 5 m 3/ (m 2 h) and ratio of gas to water 3000 m 3/m 3 for the stripping
出处
《有色金属》
CSCD
2003年第B03期130-132,共3页
Nonferrous Metals
