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接种亚硝化活性污泥,以含乙酸钠、氨氮、磷酸盐的人工配水为基质,通过逐步提高进水COD浓度,在厌氧-限氧(DO 0.3~0.8 mg·L-1)SBR中成功实现了同步脱氮除磷(SNDPR),氮、磷的去除率分别达到76.1±5%、98.4±1%.采用批式试验研究了不同进水pH值(6.0、7.0、8.0、9.0)对脱氮除磷效果及N2O释放的影响.结果表明,pH值为9.0时除磷效果最好,除磷率达到87.7%,其次为pH值为6.0时,除磷率达到84.0%;随着pH值降低,氨氧化速率呈升高趋势,pH值为6.0时氨氧化速率和脱氮率最大,二者分别为3.7 mg·L-1·h-1·g-1MLSS和83.9%;N2O释放量随pH值的升高而减小,pH值为6.0时的释放量是9.0时的3.5倍.综上,pH值为6.0时,能获得较高的脱氮除磷效率,但同时会增加N2O的释放量.
Inoculated with nitrification activated sludge, the artificial water distribution system containing sodium acetate, ammonia nitrogen and phosphate was used as substrate to gradually increase the influent COD concentration and succeeded in anaerobic-limited oxygen (DO 0.3-0.8 mg · L -1) SBR (SNDPR) was achieved, and the removal rates of nitrogen and phosphorus reached 76.1 ± 5% and 98.4 ± 1%, respectively.The batch experiments were conducted to study the effects of different influent pH values (6.0, 7.0, 8.0, 9.0) Nitrogen and phosphorus removal effect and N2O release.The results showed that the removal efficiency of phosphorus was the best at pH 9.0, the removal rate was 87.7%, followed by the pH value of 6.0, the removal rate was 84.0% The ammonia oxidation rate increased with pH value at 6.0, and the ammonia oxidation rate and denitrification rate reached the maximum at pH 6.0 (3.7 mg · L-1 · h-1 · g-1MLSS and 83.9% respectively); the N2O emission With the increase of pH value, the release amount is 3.5 times that of 9.0 when the pH value is 6.0. In conclusion, when the pH value is 6.0, the higher nitrogen and phosphorus removal efficiency can be obtained, but at the same time, the N2O The amount of release.