常温下厌氧氨氧化组合工艺处理低C与N质量浓度比的城市污水的脱氮除磷性能
发布时间：2019-07-04 21:55
【摘要】：在常温条件下,利用序批式反应器和序批式生物膜反应器的组合工艺(SBR+SBBR)处理低C与N质量浓度比(ρ(C)/ρ(N))城市污水。原水先进入SBR反应器,通过厌氧-好氧交替运行实现高效除磷,其出水进入SBBR反应器进行强化脱氮处理。SBBR反应器通过接种短程硝化污泥和厌氧氨氧化生物膜,控制适宜溶解氧(DO)质量浓度,实现全程自养脱氮。系统稳定运行期间,原水COD质量浓度为206 mg/L,总氮质量浓度为51.52 mg/L,磷酸盐质量浓度为4.09 mg/L,出水的总氮和磷酸盐质量浓度分别为10.7 mg/L和0.17 mg/L。研究结果表明:利用该组合工艺处理低碳氮比(ρ(C)/ρ(N)=4)城市污水,不外加碳源条件下,出水氮磷均可到达一级A标准。系统稳定运行的关键在于维持SBBR反应器合理的DO质量浓度(0.2~0.5 mg/L),持续抑制亚硝酸盐氧化细菌的增殖,避免硝酸盐的积累。
[Abstract]:At room temperature, (SBR SBBR), a combined process of sequencing batch reactor and sequencing batch biofilm reactor, was used to treat municipal wastewater with low concentration ratio of C to N (p (C) / p (N). The raw water first entered the SBR reactor, and the effluent was fed into the SBBR reactor for enhanced nitrogen removal. The suitable concentration of dissolved oxygen (DO) was controlled by inoculating short-cut nitrification sludge and anammoxidation biofilm to realize autotrophic denitrification in the whole process. During the stable operation of the system, the mass concentration of COD in raw water is mg/L, the mass concentration of total nitrogen is 51.52 mg/L, the mass concentration of phosphate is 4.09 mg/L, the mass concentration of total nitrogen and phosphate is 10.7 mg/L and 0.17 mg/L., respectively. The results show that the effluent nitrogen and phosphorus can reach the first class A standard without carbon source when the combined process is used to treat municipal wastewater with low carbon / nitrogen ratio (p (C) / p (N) = 4). The key to the stable operation of the system lies in maintaining a reasonable concentration of DO in SBBR reactor (0.2 鈮，
本文编号：2510264
[Abstract]:At room temperature, (SBR SBBR), a combined process of sequencing batch reactor and sequencing batch biofilm reactor, was used to treat municipal wastewater with low concentration ratio of C to N (p (C) / p (N). The raw water first entered the SBR reactor, and the effluent was fed into the SBBR reactor for enhanced nitrogen removal. The suitable concentration of dissolved oxygen (DO) was controlled by inoculating short-cut nitrification sludge and anammoxidation biofilm to realize autotrophic denitrification in the whole process. During the stable operation of the system, the mass concentration of COD in raw water is mg/L, the mass concentration of total nitrogen is 51.52 mg/L, the mass concentration of phosphate is 4.09 mg/L, the mass concentration of total nitrogen and phosphate is 10.7 mg/L and 0.17 mg/L., respectively. The results show that the effluent nitrogen and phosphorus can reach the first class A standard without carbon source when the combined process is used to treat municipal wastewater with low carbon / nitrogen ratio (p (C) / p (N) = 4). The key to the stable operation of the system lies in maintaining a reasonable concentration of DO in SBBR reactor (0.2 鈮，
本文编号：2510264
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