摘要
研究了臭氧预氧化／曝气生物滤池联合工艺对生活污水二级出水的处理特性。结果表明当臭氧投量为10mg/L、接触时间为4min时，臭氧预氧化／BAF联合工艺对COD、NH3-N的去除率分别达到58％和90％；使TOC、UV254和色度分别降低了25％、75％和90％。在上述投量和接触时间条件下，臭氧化使TOC／UV254值升高1倍，使可生化溶解性有机碳（BDOC）由原来的0．8～1．1mg／L提高到2．0～2．7mg／L。臭氧预氧化使分子质量小于1k的有机物比例由原来的52．9％升高到72．73％。
The degradation characteristics of sewage secondary effluent by the preozonation/biological-aerated-filter （BAF） coupling process were studied, The experimental results indicated that the removal rates of COD, NH3-N, TOC, UV254 and the color of secondary effluent reached 58 %, 90 %, 25 %, 75 % and 90 %, respectively, with 10 mg/L of ozone dosage and 4 min of the contact time. Preozonation enhanced the biodegradability of the secondary effluent by doubling the TOC/UV254 ratio and improving the BDOC value from original 0.8 - 1.1 mg/L to final 2.0 - 2.7 mg/L with the dosage and contact time mentioned above. At the same time, the rate of organics whose MW 〈 1 k Dalton in the secondary effluent was increased from original 52.9% to final 72.73% in 4 min of preozonation time.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2006年第11期32-36,共5页
Modern Chemical Industry
基金
教育部科技创新重大项目培育基金(705013)
