AOAB工艺处理难降解混合化工污水的挂膜启动  

Biofilm formation and start-up of AOAB system in treating multi-components chemical industrial wastewater

作　　者：林海[1] 薛秋玉[1] 董颖博[1] 霍汉鑫[1] 王泽甲[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《环境工程学报》2013年第6期2185-2190,共6页Chinese Journal of Environmental Engineering

基　　金：环境保护部环保公益性项目(201209013)

摘　　要：采用AOAB(水解酸化A1+生物接触氧化O+深度水解酸化A2+曝气生物滤池BAF)工艺处理难降解混合化工污水,重点研究工艺挂膜方式和生物膜的驯化。结果表明,采用分段连续式挂膜法进行反应器挂膜,20 d即可完成快速挂膜启动;采用分阶段同步培养驯化法驯化生物膜,30 d内可完成高浓度多组分混合化工污水进水的驯化,最终进水COD 1 456 mg/L,出水COD 324 mg/L,总去除率76.85%,驯化效果显著;整个工艺对COD的降解主要集中在生物接触氧化池和曝气生物滤池,驯化期间生物接触氧化池去除率稳定在40%左右,曝气生物滤池去除率稳定在50%以上。同时,通过对比一段水解酸化和深度水解酸化的VFA(挥发性脂肪酸)产出,表明在高有机负荷进水时,一段水解酸化降解大分子有机物的能力有限,但这些有机物可通过二段水解酸化再次降解,由此体现了AOAB工艺在处理多组分混合型的难降解化工污水的优势。AOAB was employed to treat poor biodegradable chemical industrial wastewater. The biofilm for- mation and domestication were investigated. Biofilm formation was finished in 20 days. Taking stepwise domesti- cation for 30 days, when AOAB was feed with multi-component industrial wastewater, the COD concentrations in influent and effluent were 1 456 mg/L and 324 mg/L, respectively, the COD removal rate was 76.85%. COD reduction was mainly attributed to O and BAF. Their COD removal rates were 40% and 50% , respectively. The ability of section A1 for degrading organic macromolecule compounds was limited, while section A2 could de- grade those compounds further. The fact revealed that AOAB system was competent in treating recalcitrant multi- components industrial wastewater.

关 键 词：AOAB工艺 化工污水 难降解污染物 挂膜 驯化 

分 类 号：X703.1[环境科学与工程—环境工程]