摘要
针对皮革废水生化处理出水中存在COD和色度偏高等问题,在综合分析各种皮革废水深度处理方法的基础上,提出采用UV-Fenton法对生化后的皮革废水进行深度处理。通过正交实验和单因素实验,探讨了H2O2投加量、Fe2+投加量、光照时间和溶液pH对水样中COD和色度去除的影响。在综合考虑经济性和去除效果的前提下,提出反应的最佳条件:H2O2为0.60 mL/100 mL,Fe2+为50 mg/100 mL,光照时间为60 min,溶液pH为4.0。在此条件下,当进水COD浓度为515 mg/L、色度为160倍时,COD和色度的去除率分别达到72.4%和98.37%,废水COD浓度降至142 mg/L,色度降至3倍以下,深度处理后水质达到《污水综合排放标准》(GB8978-1996)皮革废水二级排放标准。
The study mainly aims at the treatment of tannery wastewater in which the COD and chroma are higher than the national discharge standard. Based on comprehensive analysis,the UV-Fenton process was per- formed in the advanced treatment of tannery wastewater after biochemical treatment. By orthogonal and single factor experiments,the effects of H2O2 dosage,Fe2＋ dosage,exposure time and pH on the removal of COD and chroma were discussed. Considering the operating cost and removal performance,the optimal conditions put for- ward were as follows： H202 concentration of 0.60 mL/100 mL, Fe2＋ concentration of 50 mg/100 mL, exposure time of 60 min, solution pH of 4.0. Under the optimal conditions, when the concentration of influent COD was 515 mg/L,the chroma was 160 times,the removal rates of COD and chroma reached 72.4% and 98.37% , respectively,the concentration of effluent COD decreased to 142 mg/L, the chroma was lower than 3 times,which met the II tannery wastewater discharge standards of Integrated Wastewater Discharge Standard （ GB8978-1996）.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第1期181-184,共4页
Chinese Journal of Environmental Engineering
基金
中央财政支持地方高校发展专项项目
福建省高校服务海西建设重点项目(2008HX05)
莆田学院大学生科研立项(09099)
莆田学院大学生创新性实验计划项目(2012)
