摘要
印染工业区集中式污水厂普遍采用芬顿工艺作深度处理以确保出水达标,但芬顿污泥处置问题亟待解决。通过研究芬顿氧化效率、污泥成分、从芬顿污泥制备再生催化剂及中试试验,文章探索了芬顿污泥原位再生回用至水处理系统的可行性。结果表明,该生化出水的芬顿反应中COD^(Cr)去除主要通过芬顿污泥的吸附实现,氧化作用去除率仅为20%。芬顿污泥中80%以上为无机质,剩余为有机物。经酸化、还原后形成的再生催化剂铁元素以Fe^(2+)为主。中试试验中投入再生催化剂,芬顿出水COD^(Cr)质量浓度稳定低于50mg/L。因此,印染废水采用芬顿污泥原位资源化利用实现污泥减排60%以上,费运行成本减少约9%。
Fenton process is widely used for advanced treatment to ensure the quality of effluent in the wastewater treatment plant(WWTP)of dyeing industrial park.However,the disposal of Fenton sludge needs to be solved urgently.Via studying the efficiency of Fenton oxidation,composition of the sludge,preparation of regenerated catalysts from Fenton sludge and pilot test,this paper explored the possibility of Fenton sludge as in-situ resource utilized into Fenton process.Results showed that the removal of chemical oxygen demand(COD_(Cr))in Fenton process of biochemical effluent was mainly achieved by the adsorption of Fenton sludge,and the removal rate of oxidation was only 20%.80%mass of Fenton sludge were inorganic substance and the rest of them were organic compounds.The form of iron regenerated via acidification and reduction was Fe2+.With the regenerated catalyst dosed in the pilot test,the COD_(Cr) of Fenton effluent was lower than 50 mg/L.Therefore,it was shown that the disposal Fenton sludge was reduced more than 60%and the cost of Fenton process was reduced about 9%via in-situ resource utilization of Fenton sludge in dyeing wastewater.
作者
黄思远
HUANG Siyuan(Shanghai Electric Group Central Academe,Shanghai 200070,China)
出处
《净水技术》
CAS
2023年第S01期167-172,352,共7页
Water Purification Technology
关键词
印染废水
深度处理
芬顿工艺
芬顿污泥
硫酸亚铁
原位资源化
dyeing wastewater
advanced treatment
Fenton process
Fenton sludge
ferrous sulfate
in-situ
resource utilization
