摘要
采用连续流O3-BAC组合工艺对某罐车清洗废水处理站MBR出水进行了中试处理实验,研究了O3-BAC组合工艺对COD、UV254和TOC处理效果的影响,探究了处理工艺对废水中有机物的变化影响,对BAC反应柱中的微生物种类进行了分析。结果表明,在臭氧投加浓度为20 mg/L,O3反应停留时间40 min,BAC反应停留时间1 h,曝气量为0.5 L/min,反应初始pH为8,H2O2投加量为0.4‰,强化生化工艺停留时间12 h,回流量100%,反应级数为2级条件下,O3-BAC工艺处理出水COD平均值为69.9 mg/L,平均去除率为79.5%,UV254平均值为0.592 cm-1,平均去除率为86.5%。经GC-MS检测分析,经O3催化氧化后有机物种类大幅减少,主要污染物酯类、胺类、酚类和含氮杂环化合物得到了明显去除。前段BAC单元主要菌门为Firmicutes、Proteobacteria和Chloroflexi,后段BAC单元主要菌门为Firmicutes。O3-BAC组合工艺可以对罐车清洗废水MBR出水进行有效的深度处理。
The pilot-scale treatment experiment of MBR effluent from a tank car cleaning wastewater treatment station was carried out by using continuous flow O3-BAC combination process. The effects of O3-BAC combination process on the treatment effects of COD, UV254 and TOC were studied. The influence of treatment process on the change of organic matter in wastewater was explored. The microbial species in BAC reaction column were analyzed. The results showed that when the ozone concentration was 20 mg/L, the residence time of O3 reaction was 40 min, the residence time of BAC reaction was 1 h, the aeration rate was 0.5 L/min, the initial pH of the reaction was 8, the dosage of H2O2 was 0.4 ‰, the residence time of the enhanced biochemical process was 12 h, the return flow was 100 %, and the reaction order was 2, the average COD of the effluent was 69.9 mg/L, the average removal rate was 79.5 %, the average UV254 was 0.592 cm-1, and the average removal rate was 86.5 %. GC-MS analysis showed that the types of organic compounds were greatly reduced after O3 catalytic oxidation, and the main pollutants such as esters, amines, phenols and nitrogen-containing heterocyclic compounds were significantly removed. The main phyla of the former BAC unit were Firmicutes, Proteobacteria and Chloroflexi. The main phyla of the latter BAC unit were Firmicutes. O3-BAC combined process can effectively treat the MBR effluent of tank car cleaning wastewater.
作者
房蔚
吕敏
束长道
刘海东
肖磊
陈鹏飞
Fang Wei;Lv Min;Shu Changdao;Liu Haidong;Xiao Lei;Chen Pengfei(JiangsuTaoze Environmental Co.,Ltd.,Yancheng 224000;Guangdong Institute of Special Equipment Inspection and Research Maoming Branch,Maoming 525000;United Envirotech Water Treatment(Dafeng)Co.,Ltd.,Yancheng 224000,China)
出处
《广东化工》
CAS
2021年第5期96-99,共4页
Guangdong Chemical Industry
基金
广东省特种设备检测研究院科技项目(2020CY07)“石化产品罐车罐体蒸汽清洗高浓度废水臭氧催化氧化协同强化生化技术研究”。
