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采用MBR作为强化富集厌氧氨氧化菌的反应器,以氯化铵和亚硝酸盐为进水底物,通过逐步缩短水力停留时间(HRT由24 h降低到4 h),成功实现了厌氧氨氧化的启动。整个驯化过程中,NH_4~+-N和NO_2~--N的去除率均维持在90.0%以上,总氮去除负荷(NRR)最大可达0.49kg/(m~3·d),且NO_2~--N/NH_4~+-N和NO_3~--N/NH_4~+-N值分别维持在1.32和0.26附近,符合厌氧氨氧化化学反应计量学规律;同时在驯化过程中,污泥颜色逐渐由深褐色变成红褐色,SEM结果表明接种污泥以杆状菌为主,驯化结束后则以球状菌为主,且结构紧密。采用成熟厌氧氨氧化污泥进行底物(NH_4~+-N和NO_2~--N)抑制动力学试验,并对试验结果采用Haldane模型进行拟合,获得半饱和常数分别为62.54和78.47 mg/L,抑制动力学常数分别为1 244.12和102.30 mg/L,相关性系数(R~2)分别为0.998 6和0.994 5。
MBR was used as a reactor to enhance the enrichment of anaerobic ammonium oxidizing bacteria. Ammonium chloride and nitrite were used as substrates for water infiltration, which was successfully achieved by gradually reducing the HRT (HRT from 24 h to 4 h) Oxygen Ammonia starts. During the whole domestication process, the removal rates of NH_4 ~ + -N and NO_2 ~ - N were above 90.0% and the total nitrogen removal load (NRR) was up to 0.49kg / (m ~ 3 · d) - N / NH_4 ~ + -N and NO_3 ~ - N / NH_4 ~ + -N values were maintained at 1.32 and 0.26, respectively, in line with the anaerobic ammonium oxidation chemical reaction law of metrology; the same time in the acclimation process, the sludge color Gradually from dark brown to reddish brown, SEM results showed that inoculated sludge bacilli dominated domestication domestication, and the structure is compact. The kinetics of the inhibition of substrate (NH_4 ~ + -N and NO_2 ~ - N) was studied by using mature anaerobic ammonia oxidation sludge. The results were fitted by Haldane model and the half-saturation constants were 62.54 and 78.47 mg / L and the inhibition kinetic constants were 1 244.12 and 102.30 mg / L, respectively, and the correlation coefficients (R ~ 2) were 0.998 6 and 0.994 5, respectively.