基于生物强化技术实现城市污水处理系统稳定短程硝化

发布时间：2018-12-23 12:03

【摘要】：提出旁侧污泥消化液处理系统实现短程硝化,该系统中的剩余污泥中氨氧化菌(AOB)含量高,而亚硝酸盐氧化菌(NOB)含量低;将上述剩余污泥投加至城市污水处理系统实现生物强化作用,进而实现稳定短程硝化。研究结果表明:通过游离氨(FA)和游离亚硝酸盐(FNA)对NOB合成作用的抑制,可稳定实现污泥消化液短程硝化,亚硝酸盐积累率(RNA)平均为97%。通过投加短程硝化污泥结合控制溶解氧浓度可快速启动城市污水短程硝化。在短程硝化污泥投配率为5.6%和溶解氧质量浓度为0.96 mg/L的条件下,运行15 d即可重建城市污水短程硝化,RNA从1%增加至89%。基于生物强化技术实现城市污水处理系统稳定短程硝化,使得城市污水厌氧氨氧化脱氮成为可能。
[Abstract]:Short-cut nitrification was achieved in the sludge digestible liquid treatment system. The (AOB) content of ammonia-oxidizing bacteria was high and the (NOB) content of nitrite oxidizing bacteria was low in the excess sludge of the system. The excess sludge was added to the municipal wastewater treatment system to achieve bioremediation and to realize the stabilization of short-range nitrification. The results showed that through the inhibition of free ammonia (FA) and free nitrite (FNA) on the synthesis of NOB, the short-cut nitrification of sludge digestive liquid could be achieved stably, and the average (RNA) accumulation rate of nitrite was 97%. By adding short-cut nitrification sludge to control dissolved oxygen concentration, short-cut nitrification of municipal sewage can be started quickly. Under the condition of short cut nitrification sludge ratio of 5.6% and dissolved oxygen concentration of 0. 96 mg/L, the short cut nitrification of municipal sewage can be reconstructed for 15 days, and the RNA is increased from 1% to 89%. Based on biological augmentation technology, stable short-range nitrification of municipal wastewater treatment system is realized, which makes it possible to denitrification of municipal wastewater by anaerobic ammonia oxidation.
【作者单位】：北京工业大学北京市水质科学与水环境恢复工程重点实验室;
【基金】：国家自然科学基金资助项目(51508008) 北京市自然科学基金资助项目(8154041) 北京市优秀人才培养资助项目(2014000020124G043)~~
【分类号】：X703.1

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