摘要
针对氨肟化废水可生化性差和粉末活性炭(PAC)致使MBR膜污堵问题,改进PAC施用模式,降低了PAC流失,同时提高了预酸化工序预处理效果和废水可生化性。吸附试验结果表明,PAC可吸附降低氨肟化废水COD,去除率随PAC投加量增加而提高,PAC对小分子量的丙酮肟去除效果最好。工业应用结果表明,类Fenton-PAC耦合下,主要是环己酮肟被氧化降解为小分子有机物,并被PAC吸附去除;此外,吸附后的PAC可在一定程度上氧化再生、重复利用。类Fenton-PAC去除COD的主要原理为·OH对有机物的氧化降解、活性炭表面含氧官能团的络合作用和吸附网捕。
Addresses the issues of poor biodegradability in amine oxidation wastewater and membrane fouling caused by powdered activated carbon(PAC)in the MBR process.By improving the application mode of PAC,the loss of PAC is reduced,while simultaneously enhancing the pre-treatment effects of the pre-acidifi cation process and the biodegradability of the wastewater.Adsorption test results indicate that PAC can adsorb and reduce the COD of amine oxidation wastewater,with the removal rate increasing as the amount of PAC added increases,showing the best removal effect on small molecular weight compounds such as acetone oxime.Industrial application results show that under Fenton-like PAC coupling,cyclohexanone oxime is mainly oxidized and degraded into small molecular organic substances,which are then adsorbed and removed by PAC;in addition,the adsorbed PAC can be oxidatively regenerated to a certain extent and reused.The main principle of COD removal by Fenton-like PAC is the oxidation and degradation of organic matter by hydroxyl radicals(·OH),the coordination action of oxygen-containing functional groups on the surface of activated carbon,and the adsorption by the network formed.
出处
《化工设计通讯》
CAS
2024年第6期93-95,98,共4页
Chemical Engineering Design Communications
关键词
类FENTON
活性炭
氧化吸附
Fenton-like
activated carbon
oxidative adsorption
