饮用水生物稳定性控制指标体系研究

主要阐述了饮用水生物稳定性的主要控制指标AOC(可生物同化有机碳)、BDOC(可生物降解溶解性有机碳)、TP(总磷)、MAP(可生物利用磷)、BGP(细菌生长潜力)及其测定方法和AOC-T DWMS评价体系.利用层次分析法确定了在城市输水管网中各控制指标的重要性权,使城市饮用水的处理更具有针对性,保证城市饮用水的生物稳定性.

On controlling indicators and biological stability system of drinking water

The present paper is engaged in a study of the controlling indicators and biological stability system of drinking water. Its stress is put on the main controlling indicators of biological stability system of the drinking water, such as AOC (the Assimilated Organic Carbon), BDOC(Biodegradable Dissolved Organic Carbon), TP (Total phosphorous), MAP (microbial available phosphorus), BGP(Bacterial Growth Potential) and the AOC-T DWMS evaluation system. Along with it, we have also studied the ways of determining the above indicators with a brief review on the latest research advances of the subject both at home and abroad. The importance of the right factors of the above indicators is determined by the Analytic Hierarchy Process. Since the Assimilated Organic Carbon is a kind of organic matter most easily absorbed by the bacteria and synthesized in the bacterial cells, it can be regarded as a major internal factor that may lead to the multiplication of bacteria in the drinking water quality control. Our study results also show that the successive inoculation is better than the respective inoculation and simultaneous inoculation. In addition, since Biodegradable Dissolved Organic Carbon is part of the biodegradable organisms, it can be used in the heterotrophic bacteria formation in the water quality changes. Moreover, since phosphorus plays an underestimated role in the breeding and growing microorganisms in water, bacterial growth potential can be made to be a new bio-detective method in keeping the biological stability. The method introduced here is by nature simple in use and free from the application of complicated instruments or conventional facilities in the experimental process, and the above mentioned five indicators for controlling tap-water quality. In addition, the table of degraded hierarchal analysis method of the biological stability system of drinking water (AOC, BDOC, TP, MAP, BGP) show that the degraded importance of the five indicators respectively should be 0.931 5,0.313 3,0.146 2,0.093 8,0.062 5. Only by reducing the content of AOC and BDOC can better control be achieved of the stability of the drinking water.