泥膜共生/臭氧催化氧化工艺在污水处理厂提标改造中的应用  

Application of Integrated Fixed Film Activated Sludge/Catalytic Ozonation Processes in Upgrading and Reconstruction of WWTP

作　　者：刘伟刚 张欢 刘欣 谷雷严 杨卫华 刘营营 LIU Weigang;ZHANG Huan;LIU Xin;GU Leiyan;YANG Weihua;LIU Yingying(Water Supply Branch of Sinopec Shengli Petroleum Administration Co.,Ltd.,Dongying 257000,China;China Urban Construction Design&Research Institute Co.,Ltd.,Beijing 100120,China)

机构地区：[1]中国石化集团胜利石油管理局有限公司供水分公司,山东东营257000 [2]中国城市建设研究院有限公司,北京100120

出　　处：《净水技术》2024年第4期178-189,共12页Water Purification Technology

基　　金：中国石化集团胜利石油管理局有限公司科技攻关项目(GKG2204)。

摘　　要：为满足更加严格的污水排放标准,将泥膜共生/臭氧催化氧化工艺在处理水量为2×10^(4) m^(3)/d的东营S污水处理厂提标改造中应用。运行结果表明,新工艺运行后,系统去除有机物和氮素的效率提升。在进水水质、水温等条件基本相同的情况下,生化池反应碳氮比(C/N)由5.74降至4.53,乙酸钠碳源投加量降低58.9%,生化出水化学需氧量(COD_(Cr))、氨氮、总氮质量浓度分别由改造前的52.2、2.2、14.0 mg/L降至42.8、1.2、8.7 mg/L,臭氧催化氧化出水COD_(Cr)均值为20.4 mg/L。改造后泥膜共生系统中,通过扫描电子显微镜(SEM)可观察到密实、连续的生物膜体,检测出Candidatus_competibacte、Nitrospira等优势菌群,有效保证了系统稳定的氮转化和有机物去除效果,生化段溶解性有机物(DOM)去除率由32.4%提高至44.7%,臭氧催化氧化工艺基本将生化出水中残留的对甲酚、甲苯等难降解有机物完全去除。此外,在满足更高排放要求的情况下,提标改造前后水处理药剂成本基本不变。Dongying S wastewater treatment plant(WWTP)underwent an upgrade to comply with more stringent sewage discharge standards.With a capacity of 20000 m^(3)/d,the WWTP is retrofitted with an integrated fixed film activated sludge/ozone catalytic oxidation process.The process operation results indicate that the implementation of this novel process has significantly improved the removal efficiency of organic matter and nitrogen.Simultaneously,C/N in the biochemical tank decreased from 5.74 to 4.53 with a 58.9%reduction in sodium acetate carbon source dosage under virtually similar influent water quality and temperature conditions.The biochemical effluent had reductions in COD_(Cr),ammonia nitrogen and total nitrogen from 52.2,2.2,14.0 mg/L before the upgrade to 42.8,1.2,8.7 mg/L respectively.The average COD_(Cr) of the ozone catalytic oxidation effluent is measured at 20.4 mg/L.The integrated fixed film activated sludge system forms a dense and continuous biofilm,which includes dominant bacterial groups such as Candidatus_competibacte and Nitrospira,ensures stable nitrogen conversion and effective organic matter removal.The dissolved organic matter(DOM)removal efficiency in the biochemical stage increases from 32.4%to 44.7%,and the ozone catalytic oxidation process essentially eliminated difficult-to-degrade organic compounds such as cresol and toluene in the biochemical effluent.Moreover,the cost of water treatment chemicals remains essentially unchanged before and after upgrading,meeting the increased emission requirements.

关 键 词：泥膜共生 臭氧催化氧化 优势菌群 溶解性有机物(DOM) 

分 类 号：TU992[建筑科学—市政工程]