An Fang-Jiao, Huang Jian-Ming, Huang Li, Qiao Rui, Wang Jin, Chen Yong-Zhi
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
Lanzhou Railway Design Institute Company Limited, Lanzhou 730000, China.
Huan Jing Ke Xue. 2018 Nov 8;39(11):5058-5064. doi: 10.13227/j.hjkx.201804130.
Real domestic sewage was treated in a sequencing batch reactor (SBR). When the partial nitrification of SBR was achieved, the effluent was fed with quantitative NaNO, which served as the influent of the anaerobic ammonium oxidation (ANAMMOX) process of the anaerobic SBR (ASBR). The effect of different substrate ratios on the removal of nitrogen and carbon using anaerobic ammonium oxidation and denitrification was investigated under conditions with a temperature of 24℃ and pH of 7.2±0.2. The results showed that ① the nitrogen removal efficiency was optimum when the influent NO-N/NH-N was 1.4-1.6. The average effluent concentrations of NH-N, NO-N, and chemical oxygen demand (COD) were 2.14, 1.07, and 30.50 mg·L, and their removal rates were 93.62%, 97.79%, and 74.75%, respectively. The △NO-N/△NH-N and △NO-N/△NH-N ratios were 1.60 and 0.17, respectively. Total nitrogen was removed by the joint action of denitrifying and ANAMMOX bacteria. ② When the influent ratio of NO-N/NH-N increased, the contribution of ANAMMOX to nitrogen removal decreased, but the contribution of heterotrophic denitrification to nitrogen removal increased gradually. ③ The NH-N and NO-N degradation processes corresponded with zero-order reactions and fitted the linear relationship in the typical cycle. Their specific degradation rates were 0.404 and 0.599 mg·(g·h), respectively. Their ratio was 1.48, and the specific degradation rate of COD gradually increased.
实际生活污水在序批式反应器（SBR）中进行处理。当SBR实现部分硝化后，向其出水定量投加NaNO₂，作为厌氧SBR（ASBR）厌氧氨氧化（ANAMMOX）工艺的进水。在温度为24℃、pH为7.2±0.2的条件下，研究了不同底物比例对厌氧氨氧化和反硝化脱氮除碳效果的影响。结果表明：①进水NO₂-N/NH₄-N为1.4-1.6时脱氮效率最佳，出水NH₄-N、NO₂-N和化学需氧量（COD）的平均浓度分别为2.14、1.07和30.50mg·L⁻¹，去除率分别为93.62%、97.79%和74.75%，△NO₂-N/△NH₄-N和△NO₃-N/△NH₄-N比值分别为1.60和0.17，总氮通过反硝化细菌和厌氧氨氧化细菌的共同作用得以去除。②随着进水NO₂-N/NH₄-N比例增加，厌氧氨氧化对脱氮的贡献降低，而异养反硝化对脱氮的贡献逐渐增加。③NH₄-N和NO₂-N的降解过程符合零级反应，在典型周期内呈线性关系，其比降解速率分别为0.404和0.599mg·(g·h)⁻¹，二者比值为1.48，COD的比降解速率逐渐升高。
