• 关键词：反硝化除磷  反硝化除磷菌  双污泥工艺  好氧颗粒污泥  SBR

• 基金项目：国家自然科学基金(No.50808004);北京市教委科技创新平台项目

• 刘旭
• 北京工业大学环境与能源工程学院,北京市水质科学与水环境恢复工程重点实验室, 北京 100124

• 王淑莹
• 北京工业大学环境与能源工程学院,北京市水质科学与水环境恢复工程重点实验室, 北京 100124

• 彭永臻
• 北京工业大学环境与能源工程学院,北京市水质科学与水环境恢复工程重点实验室, 北京 100124

• 吴蕾
• 北京工业大学环境与能源工程学院,北京市水质科学与水环境恢复工程重点实验室, 北京 100124

• 朱云鹏
• 北京工业大学环境与能源工程学院,北京市水质科学与水环境恢复工程重点实验室, 北京 100124

• 摘要：以模拟废水为研究对象,对SBR双颗粒污泥系统的脱氮除磷性能进行了考察.试验结果表明,A₂N双颗粒污泥系统能使硝化菌和聚磷菌分别在各自最佳的环境中生长,有利于系统脱氮除磷的稳定和高效运行,可控制性也得到了提高.在COD为300 mg·L^-1条件下,系统对COD的平均去除率达到78.8%,大部分COD被聚磷菌用来合成PHA;当溶解氧控制在3.55~4.90 mg·L^-1和5.60~6.60 mg·L^-1之间时,硝化SBR对氨氮的去除率分别为87.0%和94.5%.除磷SBR仅设置缺氧段时,磷去除率为72%;增设后曝气段后,磷去除率增至85%.NO_x^--N(NO₂^--N+ NO₃^--N)的去除主要发生在缺氧段,在反硝化除磷时作为电子受体被去除,平均去除率为90.6%.

• Abstract：By using synthetic wastewater, the characteristics of denitrifying phosphorus removal process in a lab-scale two-sludge anaerobic/anoxic/nitrification SBR (A₂NSBR) aerobic granular system was studied. The result showed that the two-sludge system ensured the denitrifying and dephosphorus bacteria to grow at their optimal states, which was favorable for the stability of nitrogen and phosphorus removal efficiency. When the influent COD was controlled at 300 mg·L^-1, the COD removal efficiency was 78.8%. Most of the COD was stored as PHA in polyphosphate accumulating organisms (PAOs). When DO was controlled at 3.55~4.90 mg·L^-1 and 5.6~6.6 mg·L^-1 in nitrification SBR, the NH₄⁺-N removal efficiency reached 87.0% and 94.5%, respectively. It was also demonstrated that the removal efficiency of phosphorus was only 72% when there was only settled anoxic phase in A/A/O SBR, while it increased to 85% when post-aeration stage was added. Most of the NO_x^--N (NO₂^--N+ NO₃^--N) reduction occurred in the anoxic phase, during which NO_x^--N was electron acceptors and PHA was electron donors. On average NO_x^- removal efficiency was 90.6%.

• Key words：denitrifying phosphorus removal  denitrifying phosphorus removal bacteria  two-sludge process  aerobic granular sludge  sequencing batch reactor

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