摘要
采用预处理—生化(包括水解酸化和好氧)法处理强酸性混合染料废水,对工艺流程Ⅰ(预处理为混凝)和工艺流程Ⅱ(预处理为混凝及臭氧氧化)的处理效果进行了比较。实验结果表明:混凝处理时CaO的最佳加入量为16g/L;混凝出水采用臭氧氧化,臭氧通入量为29m g/L时,臭氧氧化出水色度为141度,色度总去除率为91%,但TOC基本没有变化,且臭氧氧化出水经过后续的生化处理后,最终出水色度与工艺流程Ⅰ相比无明显优势。采用工艺流程Ⅰ处理强酸性混合染料废水更合适,最终出水pH为8.5,COD为88m g/L,TOC为48m g/L,色度为359度,SS为25m g/L,SO24-质量浓度小于50m g/L,PO34-未检出。
Strong-acidic mixed-dye-containing wastewater was treated by pretreatment- biochemical （including hydrolysis-acidification and aeration ） process. The treatment effect of process Ⅰ （using coagulation as pretreatment process） was compared with that of process Ⅱ （using coagulation and ozonation as pretreatment process）. The optimum CaO dosage in coagulation process is 16 g/L. When the coagulation effluent is treated by ozonation with 29 mg/L of ozone flow, the chromaticity of the ozonation effluent is 141 degree, and the total removal rate of chromaticity is 91%, but there is no change in TOC. After the ozonation effluent is treated by biochemical process, the final effluent chromaticity is not obviously less than that of the process Ⅰ. So the process Ⅰ is more suitable for the treatment of strong-acidic mixed-dye-containing wastewater. The final effluent pH is 8.5, COD is 88 mg/L, TOC is 48 mg/L, chromaticity is 359 degree, SS is 25 mg/L, SO4^2- mass concentration is less than 50 mg/L, PO4^3- is undetectable.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第3期253-256,共4页
Environmental Protection of Chemical Industry
基金
江苏省社会发展项目(BS2005050)。
关键词
染料
混凝
氧化钙
臭氧氧化
水解酸化
好氧
废水处理
dye
coagulation
calcium oxide
ozonation
hydrolysis-acidification
aeration
wastewater treatment
