SBR短程硝化工艺的启动及稳定运行适宜DO探究

发布时间：2018-05-20 02:32

本文选题：溶解氧 + 短程硝化　；参考：《北京工业大学学报》2016年02期

【摘要】：在温度21~23℃时,通过考察溶解氧(DO)对短程硝化快速启动的影响发现,ρ(DO)为0.25~1.25 mg/L时均能启动短程硝化,其中0.25~0.75 mg/L属于实现短程硝化快速启动的ρ(DO)范围;ρ(DO)为0.25~0.50 mg/L与0.50~0.75 mg/L对快速启动的效果相当,主要是因为当ρ(DO)为0.25~0.50 mg/L时,虽然氨氧化菌(AOB)的竞争优势更加显著,但是AOB自身利用基质倍增所需的时间却会增大.在短程硝化的运行阶段,当ρ(DO)较高(1.50~1.75 mg/L)时,可以通过间歇性大幅降低ρ(DO)至0.50~0.75 mg/L的方法实现短程硝化的长期稳定运行.对稳定运行后期的污泥样品进行微生物分析,总细菌通用引物分析结果表明:AOB、亚硝酸盐氧化菌(NOB)占总细菌的比例分别为22.50%、3.75%,其中,亚硝化单胞菌属(Nitrosomonas sp.)是AOB的优势菌属,比例高达总细菌的17.50%.
[Abstract]:At 21~23 C, the effect of dissolved oxygen (DO) on rapid start-up of short range nitrification was investigated. It was found that rho (DO) could start short range nitrification when 0.25~1.25 mg/L was 0.25~1.25 mg/L, and 0.25~0.75 mg/L was a DO range for rapid start-up of short range nitrification. When rho (DO) is 0.25~0.50 mg/L, the competitive advantage of ammonia oxidizing bacteria (AOB) is more significant, but the time required for AOB itself to use the matrix multiplication will increase. At the running stage of short range nitrification, when p (DO) is higher (1.50~1.75 mg/L), the length of short nitrification can be achieved by the intermittent reduction of rho (DO) to 0.50~0.75 mg/L. The microorganism analysis of the sludge samples at the later stage of stable operation showed that the proportion of AOB and nitrite oxidizing bacteria (NOB) accounted for 22.50% and 3.75% respectively. Among them, the genus Nitrosomonas sp. (Nitrosomonas sp.) was the dominant genus of AOB, and the proportion was as high as 17.50%. of total bacteria.
【作者单位】：北京工业大学建筑工程学院;
【基金】：国家科技重大专项资助项目(2014ZX07201-011) 北京工业大学研究生科技基金资助项目(ykj-2013-10459)
【分类号】：X703.1

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