| HRT对厌氧氨氧化协同异养反硝化脱氮的影响 |
| 摘要点击 3205 全文点击 1141 投稿时间：2018-02-04 修订日期：2018-03-14 |
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| 中文关键词 厌氧氨氧化(ANAMMOX) 厌氧氨氧化反应器(ASBR) 水力停留时间(HRT) 生活污水 脱氮性能 贡献率 |
| 英文关键词 anaerobic ammonium oxidation (ANAMMOX) ASBR HRT domestic sewage nitrogen removal performance contribution rate |
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| 中文摘要 |
| 采用SBR处理实际生活污水，在实现半亚硝化时，出水NH4+-N、NO2--N及COD平均浓度分别为37.27、39.97和120 mg·L-1，将其作为厌氧氨氧化反应器（ASBR）的进水.控制温度为24℃，pH为7.2±0.2，考察HRT分别为36、33、30和27 h时对厌氧氨氧化协同异养反硝化脱氮的影响.结果表明：① HRT为33 h时系统脱氮效能最佳，总氮容积负荷（TNLR）和总氮去除负荷（TNRR）平均值分别为0.056 kg·（m3·d）-1和0.050 kg·（m3·d）-1；NH4+-N、NO2--N和COD平均出水浓度分别为1.36、0.47和49.79mg·L-1，三者去除率分别为96.30%、98.83%和56.17%；△NO2--N/△NH4+-N和△NO3--N/△NH4+-N分别为1.17和0.15，比厌氧氨氧化反应的理论值（1.32，0.26）小0.15和0.11，造成此偏差的原因是由于系统中存在异养反硝化.②随着HRT的逐渐减小，厌氧氨氧化对脱氮的贡献率逐渐减小，异养反硝化对脱氮的贡献率逐渐增加.本研究结果可为厌氧氨氧化技术在实际工程中的应用提供参考. |
| 英文摘要 |
| Real domestic sewage was first treated in SBR and partial nitrification was achieved. When average concentrations of NH4+-N, NO2--N, and COD were 37.27, 39.97, and 120 mg·L-1, respectively, the effluent was delivered as influent of an anaerobic ammonia oxidation reactor (ASBR). The effect of different HRTs (36 h, 33 h, 30 h, 27 h) on nitrogen removal of ANAMMOX and heterotrophic denitrification were investigated under conditions of temperature of 24℃ and pH of 7.2±0.2. Results showed that 1 nitrogen removal efficiency was optimum with HRT of 33 h. The average total nitrogen load rate(TNLR)and total nitrogen removal rate(TNRR)were 0.056 kg·(m3·d)-1and 0.050 kg·(m3·d)-1, respectively. The average effluent concentrations of NH4+-N, NO2--N, and COD were 1.36, 0.47, and 49.79 mg·L-1, and removal rates were 96.30%, 98.83%, and 56.17%, respectively. △NO2--N/△NH4+-N and △NO3--N/△NH4+-N were 1.17 and 0.15, 0.15 and 0.11 less than theoretical ANAMMOX values (1.32, 0.26) due to heterotrophic denitrification. 2 The contribution of ANAMMOX to nitrogen removal decreased; however, the contribution of heterotrophic denitrification to nitrogen removal gradually increased with decreasing HRT. This provides a point of reference for ANAMMOX in engineering applications. |
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