常温低氨氮SBR亚硝化启动策略研究

The start-up strategy of shortcut nitrification in SBR under low ammonia at room temperature

分析了不同接种污泥下，不同启动策略以及不同水质下SBR反应器亚硝化的启动．研究发现，控制低溶解氧（DO为O．30mg／L）条件，接种具有一定亚硝化效果的污泥，能在短时间内实现亚硝化的启动；而接种全程硝化污泥在29d（58个周期）的培养中都未出现亚硝酸盐的积累而通过高、低溶解氧交替培养的模式，接种全程硝化污泥的反应器也能在27d（54个周期）内达到60％以上的亚硝化率．接种全程硝化污泥，控制低溶解氧（DO为O．30rag／L），用不同C／N的水质驯化污泥．其中使用C／N为0．40-0．93的A／O生物除磷工艺二级出水作为进水的反应器在32个周期的培养中出水未出现亚硝酸盐的积累；而使用C／N比在3．50-5．34范围内的小区化粪池水能实现亚硝化的快速启动．

The start-up of nitrosationin SBR was analyzed with different seeding sludge strategy and influent. The results showed the quickly start up of nitrosation when seeding nitrosation sludge with low dissolved oxygen （DO=0.30mg/L） and no accumulation of nitrite when seeding nitrification sludge after 29days （58 cycels） operation.The rate ofnitrosation could be above 60% in 27days （54 cycles） when alternative high-low dissolved oxygen was adopted.No nitrite was accumulated when seeding nitrification sludge under low dissolved oxygen （DO=0.30mg/L）,with the effluent of A/O biological phosphorus removal process with the C/N of 0.40-0.93 after 32 cycles, while the start-up of nitrosation was realized with the influent from septic tanks with the C/N of 3.50-5.34.