高浓度乳化废水的破乳-氧化-吸附深度处理研究

目的]寻求有效的高浓度乳化废液的深度处理方法。方法]采用酸化盐析破乳-Fenton氧化-粉煤灰吸附3级工艺对实验室模拟高浓度乳化含油废水进行处理研究。结果]模拟的高浓度乳化含油废水在初始pH值为3、末期pH值为10、H2O2与Fe^2＋的物质量投加浓度比为52：1、H2O2投加量50ml／L和Fenton试剂投加量500mg／L的条件下氧化2h后，COD去除率达85．0％；对氧化后的废水进行吸附实验表明，进水COD336mg／L，在粉煤灰投加量40g/L、pH值为10的条件下振荡吸附30min后，出水COD109mg／L，COD去除率达67．5％。结论]使用这种工艺对实际的机械洗削废液进行处理，出水水质良好达国家排放标准（COD≤120mg／L，含油量≤10mg／L）。

Study on Demulsification-Oxidation-Adsorption Advanced Treatment of High Concentration Waste Emulsion

Objective] The aim was to search for the effective advanced treatment method for high concn.waste emulsion.Method] The 3 grade process of acidification salting-out demulsification-Fenton oxidation-fly ash adsorption was used to treat the stimulated high concn.oily emulsion wastewater obtained in laboratory.Result] After the simulated high concn.oily emulsion wastewater was oxidized for 2h under the condition of the initial pH of 3,the terminal pH of 10,the concn.ratio of chemical ration of H2O2/ Fe2+ of 52/1,hydrogen peroxide adding dosage of 50 ml/L and the Fenton reagent adding dosage of 500 ml/L,the COD removal rate reached 85.0%.The adsorption experiment for the oxidized wastewater showed that the 336 mg/L influent COD was oscillated and adsorbed for 30 min under the condition of the fly ash adding dosage of 40 g/L and pH value of 10,then the effluent COD was 109 mg/L and the COD removal rate reached 67.5%.Conclusion] When the technique was used to treat the actual mechanical washing wastewater,the effluent quality was good,the oil content of the effluent and the effluent COD resp.reached and approached the secondary national emission standard.