摘要
以经多级生物处理后的煤气废水为原水,采用O3-MBR组合工艺对其进行深度处理,以满足回用要求.结果表明:采用臭氧氧化工艺,当废水pH为11和臭氧投加量〔ρ(臭氧)〕为189.2mg/L时,CODCr和色度的去除率分别为46.5%和80.2%,ρ(BOD5)/ρ(CODCr)由0.02升至0.29,废水的可生化性得到明显改善;臭氧氧化工艺出水再通过MBR作进一步处理,CODCr,NH3-N和色度的去除率分别达23.0%,76.3%和70.0%,且出水水质稳定;总体上,废水经O3-MBR组合工艺处理,CODCr,NH3-N,色度和浊度的平均总去除率分别达到58.7%,76.3%,88.6%和95.1%;处理后出水的ρ(CODCr)<50mg/L,ρ(NH3-N)<5mg/L,浊度<0.2NTU,色度约为30度,出水水质满足生产工艺回用的要求.
In order to meet the requirements of industrial recycling, an ozonation and membrane bioreactor （O3-MBR） combined process was used to further deal with the effluent of coal gasification wastewater, which had been treated by a multi-stage biological process. The experimental resuJts showed that 80. 2% of the colority and 46.5% of CODCr in the wastewater were removed by using an ozone dosage of 189.2 mg/L at initial pH 11, and the p（ BOD5 ）/p（CODcr） ratio increased from 0. 02 to 0. 29 at the ozonation process. In order to ensure stable water quality, MBR was used after the ozonation process for further treatment, and the removal efficiencies of CODCr ,NH3-N and colority reach 23.0% ,76. 3% and 70. 0% respectively. Overall,the stable effluent quality could be ensured by the O3 -MBR combined process, and the average removal efficiencies for CODcr, NH3 -N, colority and turbidity were 58.7% ,76.3% ,88.6% and 95.1% respectively. Moreover, turbidity,p（CODcr） and p（ NH3-N） concentrations of the final effluent were less than 0. 2 NTU ,50 mg/L and 5 mg/L, respectively, and the colority was about 30 Pt-Co unit. The effluent quality of treated wastewater could meet the requirements for reuse as the cooling make-up water or other purposes.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2010年第7期970-974,共5页
Research of Environmental Sciences
基金
国家水体污染控制与治理科技重大专项(2008ZX07207-003)
