类Fenton氧化—好氧移动床生物膜法处理抗生素发酵废水  

Enhanced Fenton oxidation and biodegradation in aerobic moving bed biofilm reactor for treatment of antibiotic fermentation wastewater

作　　者：邢子鹏[1] 商佳吉[1] 孙德智[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《环境污染与防治》2009年第1期1-4,9,共5页Environmental Pollution & Control

基　　金：国家"973计划"项目(No.2004CB418505)

摘　　要：采用类Fenton氧化—好氧移动床生物膜(MBBR)法处理难降解抗生素发酵废水,探讨了H2O2和草酸投加量对类Fenton氧化工艺以及HRT和曝气量对好氧MBBR反应器的影响。实验结果表明,当类Fenton氧化工艺的最佳操作参数为反应溶液H2O2和草酸初始质量浓度分别为150、45mg/L、30W/154nm紫外灯照射1h、pH为3.0,在曝气搅拌条件下,COD平均去除率为80.9%。当类Fenton氧化工艺出水pH在7.0时,废水中的污染物还可以进一步被混凝去除。好氧MBBR反应器的最佳工艺参数为HRT12h、曝气量0.10m3/h以及填料填充比(体积比)30%,最终废水COD平均去除率为99.1%,达到《污水综合排放标准》(GB8978—1996)三级标准要求。The enhanced Fenton oxidation and biodegradation in an aerobic moving bed biofilm reactor （MBBR） was employed for the treatment of a high concentration refractory antibiotic fermentation wastewater. The raw wastewater was pretreated by coagulation and sedimentation using polymeric iron sulfate （PFS） as the coagulant to remove about 50% of organic loading and to provide the essential Fe^2＋ for the subsequent Fenton oxidation,which was enhanced by UV irradiation and the addition of oxalic acid to achieve further organic removal and to improve biodegradability of the residual organic constituents for their final removal in the MBBR. The effects of H2O2 and oxalic acid doses on the Fenton treatment and HRT and aeration rate on the MBBR performance are presented. Employing 150 mg/L of H2O2,45 mg/L of oxalic acid,the Fenton oxidation under UV illumination for 1 h at pH 3.0 with aeration to supply the DO,removed 80.9% of COD. After the second stage of sedimentation at pH of 7.0,the supernatant was biotreated in the MBBR （30% filled with the biofilm carrier） operating at a HRT of 12 h and an aeration rate of 0.10 m^3/h. The highly effective combined treatment consistently removed 〉99% COD; the final effluent met the discharge limits of the pharmaceutical industry.

关 键 词：抗生素发酵废水 类FENTON氧化 好氧移动床生物膜 COD 

分 类 号：X703[环境科学与工程—环境工程]