O_3-H_2O_2与活性炭负载TiO_2预处理晚期垃圾渗滤液

采用O_3-H_2O_2高级氧化结合催化O_3氧化技术对晚期垃圾渗滤液进行预处理,考察了颗粒活性炭负载二氧化钛(TiO_2/GAC)催化剂的催化效果,并研究了反应体系中O_3和H_2O_2投加量以及pH等因素对COD去除效果的影响.结果表明,当O_3投加量为1.8 g·L~(-1),H_2O_2投加量为0.27 g·L~(-1),催化剂投加质量分数为15%时,反应90min的COD去除率达到40%;对出水调节pH≥11.4,经过沉淀后,COD去除率提高到58%.出水澄清透明,BOD5/COD从＜0.1提高到0.26.水质得到较大改善,可生化性明显提高,为后续的生化处理工艺起到较好的预处理作用.

STUDY ON PRETREATMENT OF ADVANCED STAGE LANDFILL LEACHATE BY O_3-H_2O_2+TiO_2/GAC

O_3-H_2O_2:advanced oxidation process combined with catalytic ozonation technology was applied as pretreatment in treating advanced stage landfill leachate. Effects of TiO_2-mounted particle active carbon(TiO_2/GAC)using in catalytic ozonation were investigated, meanwhile, the effective factors, such as the amount of O_3, H_2O_2, and their proportion of dosage were studied. The results showed that when adding O_3 1.8 g·L~(-1), H_2O_2 0.27 g·L~(-1) and 15% catalyst, after 60 mill reaction, the COD removal rate could reach 40%. Then, adjusted effluent pH value to 11.4, after precipitation, COD removal ram raised to 58%, the supernatant fluid was clarify and transparent, BOD_5/COD、Ⅳas increased from less 0. 1 to 0.26.water quality Was improved a lot, biodegradability was obviously increased, which had made a good preliminary treatment work for the following biochemical treatment.