Zhou Fei-Fei, Zhang Han-Min, Fu Zhi-Min, Yang Feng-Lin
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
Huan Jing Ke Xue. 2009 Jun 15;30(6):1674-80.
The performances of A/O-MBR/RO system for the removal of nitrogen and COD were investigated. Result indicated that most organic was removed in the A/O-MBR and the average removal efficiency was 95.6%. The water quality of RO effluent which in terms of TOC < 0.9 mg x L(-1), TN < 12.65 mg x L(-1), total rigidity < 0.038 mol x L(-1), total alkalinity < 14.6 mg x L(-1) could meet the water quality requirements for the town wastewater reuse. The average removal efficiency of organic was almost unaffected by COD/N, but the process of TN removal was affected by COD/N. TN removal was primarily based on simultaneous nitrification and denitrification (SND) process occurred in the aerobic zone and the average removal efficiency of TN was 89.4% with average COD/N of 10.2. Both aerobic SND and conventional biological nitrification/denitrification contributed to nitrogen removal, the average removal efficiency of TN was 72%, 74% with average COD/N of 7.1 and 5.6. The fouling cake layer formed on the RO membrane surface was observed by scanning electric microscopy. The membrane fouling was characterized by Fourier transform infrared spectroscopy technique which showed that the major components of the foulants were soluble microbe products.
研究了A/O-MBR/RO系统对氮和化学需氧量（COD）的去除性能。结果表明，大部分有机物在A/O-MBR中被去除，平均去除效率为95.6%。反渗透（RO）出水水质的总有机碳（TOC）<0.9mg·L⁻¹、总氮（TN）<12.65mg·L⁻¹、总硬度<0.038mol·L⁻¹、总碱度<14.6mg·L⁻¹，可满足城镇污水回用的水质要求。有机物的平均去除效率几乎不受COD/N的影响，但TN的去除过程受COD/N的影响。TN去除主要基于好氧区发生的同步硝化反硝化（SND）过程，平均COD/N为10.2时，TN的平均去除效率为89.4%。好氧SND和传统生物硝化/反硝化均对氮去除有贡献，平均COD/N为7.1和5.6时，TN的平均去除效率分别为72%、74%。通过扫描电子显微镜观察了RO膜表面形成的污垢滤饼层。采用傅里叶变换红外光谱技术对膜污染进行了表征，结果表明，污染物的主要成分是可溶性微生物产物。
