微电解-SBR处理皮革废水及其生物降解动力学  

Study on Biodegradation Kinetics in the Treatment of Tannery Wastewater by Micro-Electrolysis-SBR Process

作　　者：荆国华[1] 李艳[1] 周作明[1] 

机构地区：[1]华侨大学化工学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2010年第4期434-437,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(D0710019);福建省科技计划重大项目(2005HZ03-3);华侨大学科研基金资助项目(07HZR22)

摘　　要：采用微电解与序批式活性污泥法（SBR）结合的工艺,处理皮革废水,考察连续运行的处理效果,并研究其生物降解动力学.结果表明,皮革废水经微电解预处理后,化学需氧量（COD）降低40%~60%;而经SBR处理后,最终出水的主要水质参数均达到污水排放二级标准.对SBR池中生物降解动力学分析表明,曝气阶段基质降解服从一级反应动力学.高COD质量浓度进水的一级反应动力学常数为0.28 h-1,可降解COD的质量浓度为1.218 g.L-1,COD可生化率为86.6%;而低COD质量浓度进水的一级反应动力学常数为0.32 h-1,可降解COD的质量浓度为0.493 g.L-1,COD可生化率为82.0%.The treatment efficiency of tannery wastewater by micro-electrolysis-SBR（sequencing batch reactor） and the kinetics of biodegradation in SBR process were both investigated in this paper.After micro-electrolysis process,the COD removal efficiency decreased 40%~60%,which makes the quality of wastewater more favorable for subsequent biological treatment.The final effluent water qualities of COD,SS,chroma,pH,BOD5,sulfide and total chromium all met the secondary national wastewater discharge standard.In SBR aeration process,the substrate degradation followed first order reaction kinetics.With 1.406 g·L-1 COD concentration influent,the rate constant K0,degradable COD concentration ρ0,and biochemical degradation rate were 0.28 h-1,1.218 g·L-1,86.6% respectively,and 0.32 h-1,0.493 g·L-1,82.0% of that at low COD concentration of 0.601 g·L-1.

关 键 词：皮革废水 微电解 序批式活性污泥法 动力学 生物降解 

分 类 号：X794.031[环境科学与工程—环境工程] TQ013.2[化学工程]