常规处理工艺对可同化有机碳去除特性的研究

Study on the removal performance of assimilable organic carbon by conventional water treatment process

对镇江市金西水厂常规处理工艺去除饮用水中可同化有机碳的特性进行了研究。试验结果表明：原水与出厂水中AOC浓度波动较大，分别为41～178μg／L和47～198μg／L，均属于饮用水生物稳定性临界区间；因氯氧化、混凝沉淀和砂滤等共同作用，常规处理工艺对总AOC、AOC—P17、AOC—NOX的去除率分别为-13％、17．1％与-83．3％，且受水温影响明显；常规处理工艺改变了水中AOC的组成比例，出厂水中AOC—NOX所占比例由30％升至49％。

The removal characteristics of assimilable organic carbon （AOC） by conventional water treatment processes were researched at Jinxi Waterworks in Zhenjiang City, Jangsu Province. The results shown that the AOC concentrations in raw water and treated water are critical whether for biological stability or drinking water safety and they are fluctuant with wide rang of 41 to 178 μg/L and 47 to 198 μg/L respectively. The combined removals through conventional water treatment process of chlorination, flocculation -sedimentation and sand filtration for AOC, AOC-P17 and AOC-NOX in drinking water are -13. 0%, 17. 1% and -83. 3% respectively and which is evidently influenced by water temperature. The percentage of AOC-P17 and AOC-NOX in AOC are changed by conventional water treatment process, the percentage of AOC-NOX was risen from 30 in raw water to 49% in finished water.