O_(3)/H_(2)O_(2)氧化法处理难降解化工废水中试研究  

Pilot study on treatment of hard-degradable chemical wastewater by O_(3)/H_(2)O_(2) oxidation method

作　　者：王玉 张亚维 王刚 WANG Yu;ZHANG Ya-wei;WANG Gang(Guangzhou Sinovast Energy-Environment Group Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广州华浩能源环保集团股份有限公司,广州510000

出　　处：《工业用水与废水》2021年第5期19-22,共4页Industrial Water & Wastewater

摘　　要：采用O_(3)/H_(2)O_(2)协同氧化法对某化工园污水处理厂气浮池出水进行试验研究,探讨H_(2)O_(2)投加量、O_(3)流量以及反应时间对气浮池出水CODCr的去除效果。结果表明:在H_(2)O_(2)投加量为25 mg/L,O3流量为3.0 m^(3)/h,反应时间为120 min的反应条件下,O_(3)/H_(2)O_(2)协同氧化法对COD_(Cr)去除率达50.69%,增加外回流,控制回流量为9.08 m^(3)/h,COD_(Cr)的去除率提高22.21%;在外回流量为9.08 m^(3)/h的条件下,当H_(2)O_(2)投加量不变时,调节O_(3)流量为2.0 m^(3)/h,反应时间为90 min,COD_(Cr)去除率可达到86.06%,出水COD_(Cr)的质量浓度降到13.6 mg/L,满足GB 18918—2002《城镇污水处理厂污染物排放标准》一级A标准的要求(ρ(COD_(Cr))≤50 mg/L)。O_(3)/H_(2)O_(2) synergistic oxidation method was used to conduct an experimental study on the effluent water from an air flotation tank of a sewage treatment plant in a chemical park;the effect of H_(2)O_(2) dosage,O_(3) flow and reaction time on COD_(Cr) removal from the effluent water of air floatation tank were discussed.The results showed that,when the H_(2)O_(2) dosage was 25 mg/L,the flow rate of O_(3) was 3.0 m^(3)/h,the reaction time was 120 min,the removal rate of COD_(Cr) by O_(3)/H_(2)O_(2) synergistic oxidation reached 50.69%.through increasing external return flow and controlling the return flow of 9.08 m^(3)/h,the removal rate of COD_(Cr) increased by 22.21%.Under the condition that the external return flow was 9.08 m^(3)/h,the H_(2)O_(2) dosage remained unchanged,the flow rate of O_(3) was adjusted to 2.0 m^(3)/h,the reaction time was 90 min,the removal rate of COD_(Cr) could reach 86.06%with the mass concentration decreased to 13.6 mg/L,the effluent water quality met the requirement of level A grade 1 in GB 18918—2002 Pollutant discharge standard for urban wastewater treatment plants(ρ(COD_(Cr))≤50 mg/L).

关 键 词：化工废水 O_(3)/H_(2)O_(2) 协同氧化 反应时间 COD_(Cr) 外回流 

分 类 号：X703.1[环境科学与工程—环境工程]