摘要
蒽醌染整废水的COD质量浓度ρ(COD)为750～850 mg·L-1,色度400～500倍,ρ(BOD5)/ρ(COD)为0.10～0.13,属难生化处理废水.采用微电解-Fenton试剂催化氧化组合工艺对该废水进行处理,研究探讨该处理过程各种反应条件和工艺参数对处理效果的影响,以及难降解有机物的转化途径.当微电解柱铁炭体积比1:1,进水pH值4.0,反应时间2.0 h,Al2(SO4)3投加量150 mg·L-1,助凝剂PAM投加量3 mg·L-1,沉淀时间30 min时,微电解-混凝沉淀处理出水的ρ(COD)为208～342 mg·L-1,ρ(BOD5)为17～30 mg·L-1,色度15～40倍;后续处理采用Fenton试剂催化氧化,当FeSO4投加量200 mg·L-1,H2O2投加量100 mg·L-1,pH值5.0,反应时间30 min时,处理出水的ρ(COD)≤50 mg·L-1,ρ(BOD5)≤10 mg·L-1,色度≤20倍数.
We have studied the treatment of anthraquinone dyeing wastewater, a refractory organic wastewater characterized with COD 750- 850 mg· L^- l, 400 - 500 units chromaticity and ρ （BOD5） / ρ（COD） ratios of 0.10-0.13, by micro-electrolysis ＆ Fenton reagent oxidation process. The pathways of refractory organics conversion and treatment efficiency influenced by various reaction conditions and process parameters were investigated too. The results indicated that when the ratio of Fe and C volume in the electrolysis column was 1：1, hydraulic reacting time （HRT） was 2 0 h, the dosages of Al2 （SO4）3 and PAM were 150 mg· L ^- 1 and 3 mg· L^-1, respectively, as well as the sedimentation time was 30 min at pH= 4, the effluent showed ρ（COD）208 - 342 mg· L^-1, ρ（BOD5）17 - 30 mg· L^-1, chromaticity 15 - 40 units, respectively, through micro-electrolysis and chemical coagulation process. Fenton-oxidation process taken as subsequent process showed that when the dosages of FeSO4 and H2O2 were 200 mg·L^-1 and 100 mg· L^-1, respectively, as well as the reacting time was 30 min at pH =5, ρ（COD）, ρ（BODs）and chromaticity of effluent were below 50 mg· L^-1, 10 mg· L^-1 and 20 units, respectively.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第12期1635-1640,共6页
Journal of Tongji University:Natural Science
关键词
蒽醌染整废水
难生物降解
微电解
混凝沉淀
FENTON试剂
anthraquinone dyeing wastewater
refractory
micro-electrolysis
chemical coagulation
Fenton reagent oxidation
