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以广州南部供水工程的长距离输水管道为研究对象,通过检测沿程异养菌和氨氧化细菌的存在水平及水质参数变化,评估输水管道内生物降解作用及硝化作用状况,分析水质可能受到的影响,为输水管道生物作用的调控及净水效能优化提供参考。结果表明,在输水管道沿程异养菌及氨氧化细菌均被检出,浓度分别为(1.7×104)～(1.3×105)CFU/mL及160～300 MPN/mL;输水管道内存在明显的生物净化作用,沿程氨氮、亚硝酸盐氮、pH值、CODMn和TOC浓度总体呈下降趋势,而硝酸盐氮浓度呈上升趋势;沿程的溶解氧含量不断减少,但由于水源水质较好,管道末端的溶解氧含量仍能保持较高水平。
Taking the long distance water supply pipeline in southern Guangzhou water supply project as the research object, the biodegradation and nitrification in the water pipeline were evaluated by detecting the existence of heterotrophic bacteria and ammonia oxidizing bacteria and the change of water quality parameters, and the possible influence of water quality Influence, and provide a reference for the regulation of biological function of water pipeline and the optimization of water purification efficiency. The results showed that both heterotrophic bacteria and ammonia-oxidizing bacteria were detected along the pipeline, and the concentrations were (1.7 × 104) ~ (1.3 × 105) CFU / mL and 160 ~ 300 MPN / mL respectively. , While the concentration of ammonia nitrogen, nitrite nitrogen, pH value, CODMn and TOC along the process showed an overall downward trend, while the nitrate nitrogen concentration showed an upward trend. The dissolved oxygen content along the process continued to decrease. However, due to better water quality , Dissolved oxygen content at the end of the pipe can still maintain a high level.