膜芬顿+BAC/BAF工艺用于RO浓水深度处理  

Application of Membrane Fenton/BAC/BAF Integrated Process in Advanced Reverse Osmosis Brine Treatment

作　　者：刘建林 谢杰 陈嘉豪 LIU Jian-lin;XIE Jie;CHEN Jia-hao(Citic Envirotech Ltd.,Guangzhou 510665,China)

机构地区：[1]中信环境技术有限公司,广东广州510665

出　　处：《中国给水排水》2023年第6期108-112,共5页China Water & Wastewater

摘　　要：针对污水处理及回用系统中反渗透(RO)浓水的有机污染物含量高、色度高、含盐量高、可生化性差等传统技术难以处理的特点,采用膜芬顿+BAC/BAF新型组合工艺进行处理。该组合工艺应用于印染废水处理及回用的中试结果表明,膜芬顿对COD的去除效果显著,不同加药量可使出水的可生化性有不同程度的提升,BAC/BAF能进一步降解废水中剩余的可生化有机物,包括有机氮。对TN的去除效果很大程度上取决于废水中可生化降解COD的量。膜芬顿+BAC/BAF组合工艺可高效去除多种污染物组分、运行成本低、工艺运行稳定、抗冲击能力强,最终出水COD、TP、TN、NH_(3)-N等可分别降至20~40、<0.1、5~9、<0.5 mg/L,相应去除率分别达到86.0%、97.9%、69.3%、90.5%。A newly invented integrated wastewater treatment process comprised of membrane Fenton/BAC/(or)BAF was adopted to treat the concentrated brine from the reverse osmosis in water reclamation system.The brine was characterized as containing high concentration organics,high color,high salinity and poor biodegradability,which was often found difficult to treat using conventional technologies.The novel process was experimented in a textile industrial wastewater treatment and recycling plant.Pilot-scale test results showed that membrane Fenton exhibited remarkable performance on COD removal.In addition,the biodegradability of effluent was significantly improved in line with the dosage of Fenton reagents.As a result,the downstream BAF or BAC could completely degrade more biodegradable organics including organic nitrogen in membrane Fenton effluent,and the removal efficiency of TN very much depends on the amount of biodegradable COD in membrane Fenton effluent.The combined process of membrane Fenton/BAC/BAF had the advantages such as excellent removal of wide range of pollutants,low treatment cost,stable operation and resilience to load fluctuation.The RO brine treatment produced excellent final effluent quality,for example,COD,TP,TN and NH_(3)-N were reduced to 20-40 mg/L,less than 0.1 mg/L,5-9 mg/L and less than 0.5 mg/L,with removal efficiencies up to 86.0%,97.9%,69.3% and 90.5%,respectively.

关 键 词：RO浓水 膜芬顿 BAC BAF 

分 类 号：TU992.3[建筑科学—市政工程]