Abstract：This paper selects the dissolved oxygen (DO) concentration and the effluent ammonia concentration (NH4+-N) as control factors, exploring the feasibility of nitrification and the value of DO/NH4+-N (R-value) in biofilm process under the different temperature and organic carbon source dosage (COD/NH4+-N). At 15, 20, 25℃, the DO/NH4+-N value of partial nitrification was about 0.08, 0.17, 0.25, respectively. It shows that ratio control can realize partial nitrification, and the reduction of R can make up for the adverse effect of temperature reduction.When the concentration of DO was 3.5mg/L and the ammonia concentration was 14mg/L, the partial nitrification was achieved, while the concentration of DO and ammonia respectively was 1.8mg/L, 3mg/L, and the partial nitrification was destroyed, which indicated that the realization of partial nitrification in biofilm reactor was decided by DO/NH4+-N, not just DO. The organic carbon content were 0, 60mg/L respectively, R-value of partial nitrification increasing from 0.25 to 0.38, but the partial nitrification damaging in R=0.6, which illustrated that the more organic carbon source were added, the regulation scope of R is broader, facilitating the realization of partial nitrification, but the R amplification is limited.
赵青, 卞伟, 李军, 赵昕燕, 阚睿哲, 王文啸, 孙艺齐, 梁东博, 张舒燕. DO/NH4+-N调控实现MBBR工艺生活污水短程硝化[J]. 中国环境科学, 2017, 37(12): 4511-4517.
ZHAO Qing, BIAN Wei, LI Jun, ZHAO Xin-yan, KAN Rui-zhe, WANG Wen-xiao, SUN Yi-qi, LIANG Dong-bo, ZHANG Shu-yan. DO/NH4+-N control to achieve partial nitrification of municipal wastewater in MBBR process. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4511-4517.
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