| 城市污水三污泥系统自养脱氮与强化生物除磷 |
| 摘要点击 2956 全文点击 1802 投稿时间：2009-11-26 修订日期：2010-02-02 |
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| 中文关键词 城市污水 三污泥系统 强化生物除磷 半亚硝化 厌氧氨氧化 |
| 英文关键词 municipal wastewater three-sludge system enhanced biological phosphorus removal partial nitritation ANAMMOX |
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| 中文摘要 |
| 采用“A/O除磷+半亚硝化-厌氧氨氧化自养脱氮”三污泥系统, 实现了城市污水营养物经济高效去除.结果表明, 在水力停留时间(HRT)为3.6 h条件下, A/O除磷系统出水总磷(TP)≤0.5 mg/L; 在常温、DO＜0.2 mg/L和HRT=4.6 h条件下, 半亚硝化系统实现了亚硝氮累积率为75%～96%的半亚硝化; 在温度为27～30℃和HRT=1.4h条件下, 厌氧氨氧化(ANAMMOX)系统出水总氮(TN)≤8 mg/L, 最低值为1.6 mg/L, TN去除负荷达到0.57 kg/(m3·d). 三污泥系统中聚磷菌、氨氧化菌和ANAMMOX菌均在各自适宜的环境条件下生存, 优化了污泥种群, 提高了各工艺单元的处理效率. 城市污水自养脱氮系统理论上可以减少62.5%的供氧量, 节省100%反硝化碳源, 同时降低了污泥产量, 大大减少了CO2的排放. 与传统的生物脱氮除磷工艺相比, 三污泥系统具有节能降耗减排上的巨大优势和潜力, 也有利于实现水资源的循环利用和可持续发展. |
| 英文摘要 |
| Using a three-sludge system consisted of anaerobic/oxic (A/O) process, partial nitritation and anaerobic ammonium oxidation (ANAMMOX) reactors, cost-effective removal of nitrogen and phosphate from municipal wastewater was achieved. The experimental results showed that effluent total phosphorus (TP) of the A/O system was less than 0.5 mg/L under hydraulic retention time (HRT) of 3.6 h. Partial nitritation with nitrite accumulation efficiency of 75%-96% was realized in the partial nitritation system under room temperature, DO＜0.2 mg/L and HRT of 4.6 h.Under temperature of 27-30℃ and HRT of 1.4h, effluent total nitrogen (TN) and TN removal rate of ANAMMOX reactor were less than 8 mg/L with the minimum value of 1.6 mg/L and 0.57 kg/(m3·d), respectively. In the three-sludge system, phosphate accumulating organisms, ammonia-oxidizing bacteria and Anammox bacteria existed under suitably environmental condition to optimize the microbial community structure and improve treatment efficiency of various units. Autotrophic nitrogen removal can reduce 62.5% of the oxygen supply, save 100% of denitrification carbon sources theoretically, lower the sludge production, and greatly decrease carbon dioxide emission. As compared to traditional biological nutrient removal process, the three-sludge system has great advantages and potential in energy saving and carbon dioxide emission reduction to realize sustainable development of water resources. |
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