Study on the Treatment of Surface-cleaning Wastewater by Photocatalytic Oxidation and Inner Electrolysis

摘要 电子产品的清洗是电子产品生产过程中的一个重要环节，所产生的废水含有大量洗涤剂，难以生化降解，其处理工艺目前尚不成熟。 本课题采用光催化氧化与铁碳内电解法对厦门市某电子工业企业所用清洗剂的配制废水进行了处理实验，研究了这两种处理方法的处理效果和主要影响因素，并探寻了将光催化氧化与铁碳内电解法组合处理电子工业清洗废水的可行性。经过实验研究，初步得到以下结论： （1）采用20W紫外灯为光源的光催化氧化过程中，反应处理，其最佳反应pH均为2；最经济纳米TiO2投加量为10g/L、10g/L、8g/L；最佳紫外灯光照时间分别为180min、120min、60min；反应后的出水CODcr分别...Abstract Cleaning is a very important step in electronic industry. The cleaning wastewater contains detergent. Its component is complicated and non-biodegradable. Treating cleaning wastewater effectively is an exigent task in the field of industrial wastewater treatment, but the present technics are not so mature. In this paper, the photocatalytic oxidation and the inner electrolysis are the chi...学位：工学硕士院系专业：海洋与环境学院环境科学与工程系_环境工程学号：2262006115237

STUDY ON THE ADVANCED TREATMENT of DYE WASTEWATER USING IRON-CARBON INTERNAL ELECTROLYSIS

采用内电解法对经过生化处理后仍不能达标的印染废水进行深度处理实验,结果表明:当PH维持在4左右,反应时间控制在16MIn左右时,出水投加CA(OH)2约2g/l混凝沉淀,则废水的色度去除率可达87.5%,COd的去除率也可达到50%~80%,处理后的出水完全达到gb8978-1996《污水综合排放标准》一级标准的要求。After being treated by biological method,the dye wastewater can not meet the national standard,so internal electrolysis is used as a follow-up treatment of biochemical treatment.It is analyzed the relationship between removal rate and those factors such as the pH,time and coagulation dosage.When pH=4,Ca(OH)_2 dosage is 2g/L,the decoloring rate can be 87.5% and the removal rate of COD is 50%--80%.The effluent can meet the filst-order of" Waste water Integrated discharge Stand"

Study on Treatment of Pinellia ternata Soaking Wastewater Using Fenton Reagent

采用Fenton试剂对半夏泡制废水进行氧化处理试验,结果表明:不同的反应温度、H2O2和FeSO4·7H2O的投加量,以及不同的反应时间条件下,Fenton试剂对半夏泡制废水的氧化处理效果不同。当反应条件控制在水温60℃、H2O2投加量50mL/L、FeSO4·7H2O投加量2.80g/L、反应时间8h时,CODCr为9155mg/L的废水,去除率达71.3%,处理效果较为理想。An experiment of Pinellia ternata soaking wastewater treatment using Fenton reagent was carried out,the results showed that effects of Fenton reagent on oxidation treatment of Pinellia ternata soaking wastewater were different under different conditions,including different temperature,reaction time,dosage of H2O2 and FeSO4·7H2O. When water temperature and reaction time were controlled at 60 ℃ and 8 h,and dosage of H2O2 and FeSO4·7H2O were controlled 50 mL/L and 2. 80 g/L,the concentration of CODCr in the wastewater was 9 155 mg/L,and the removal rate of CODCr was 71.3%,the treatment effect was perfect

EXPERIMENTAL RESEARCH ON TREATMENT of DOMESTIC WASTEWATER WITH COAGULANTS IN SBR

分别向按A/O方式运行的Sbr反应器中投加一定量氯化铁、硫酸铝、聚合氯化铝,考察这3种金属盐混凝剂强化活性污泥系统处理生活污水的效果。结果表明,这3种混凝剂的化学辅助除磷效果较好,其中,在100Mg/l(以进水量计)的投加量下,投加氯化铁和硫酸铝的强化处理系统对TP的平均去除率比空白组分别提高了65.52%和69.95%。对有机物的去除也有一定强化作用,对氮的强化处理效果不明显,但可提高活性污泥沉降性能。Based on the SBR reactor running with the A/O process,the effect of enhancing activated sludge system adding coagulants(ferric chloride,aluminum sulfate and poly-aluminum chloride)on treating domestic sewage has been studied.Results showed that the three coagulants were efficient in chemical-aid phosphorus removal.The groups separately adding ferric chloride and aluminum sulfate in dose of 100 mg/L(in influent)gained the additional average removal rates of TP about 65.52% and 69.95%.The three coagulants also strengthened the removal of organic matter and had no great influence on the removal of nitrogen,but could improve the performance of sludge settlement