摘要
某化工集团排出的含甲醛废水具有来源复杂,水质水量差别大,处理难度高等特点,采用微电解—OCAR—两级接触氧化组合工艺进行分质处理。在高浓度废水CODCr和甲醛浓度分别为5 276.7 mg/L和82.52 mg/L时,微电解—OCAR系统的平均去除率为78.6%和76.5%,预处理后各类废水经两级接触氧化池处理后CODCr和甲醛浓度分别为106.9 mg/L和3.72 mg/L。经分析,为确保出水甲醛稳定达标,可将设计中原有的砂滤池改造为化学氧化池,H2O2(质量分数为30%)最佳投加量为1 mL/L。工程处理直接运行费用为3.9元/m3。
The formaldehyde-containing chemical wastewater from some chemical group has the characteristics of complex compounds,varying water quantity,and difficulty for treatment.The micro electrolysis-OCAR-composite contact oxidation was employed for separated treatment.When the CODCr and formaldehyde concentrations in wastewater were 5 276.7 mg/L and 82.52 mg/L respectively,the average removal rate of micro electrolysis-OCAR were 78.6% and 76.5% respectively,and the CODCr and formaldehyde concentrations in composite contact oxidation tank effluent were 106.9 mg/L and 3.72 mg/L respectively after pre-treatment.After analysis,it was proposed to modify the existing sand filtration tank into chemical oxidation tank to satisfy the formaldehyde concentration in effluent and the optimized H2O2（ωB=30%）dosage was 1 mL/L.The engineering operation cost was 3.9 YUAN/m3.
出处
《给水排水》
CSCD
北大核心
2011年第2期57-60,共4页
Water & Wastewater Engineering
基金
上海市科委能力建设项目(08160512600)
上海高校选拔培养优秀青年教师科研专项基金
关键词
甲醛废水
OCAR
接触氧化
化学氧化
Formaldehyde-containing chenical wastewater
OCAR
Contact oxidation
Chemical oxidation
