论文部分内容阅读
针对姚江水源受污染的现状和原传统净水工艺去除污染效率低、药耗大等缺点，对宁波市梅林水厂的传统净水工艺进行了改进，并对改进前后的去除污染效率进行了对比试验研究．结果表明，在姚江水质为ｐＨ６．５－７．６、浊度７－２０ＮＴＵ、色度２５－３７度、ＮＨ＋４－Ｎ０．２５－９．０ｍｇ／Ｌ、ＮＯ－２－Ｎ０．０２５—０．２５ｍｇ／Ｌ、ＣＯＤＭｎ６－１８．９ｍｇ／Ｌ的条件下，改进后的生化工艺系统对浊度、色度、ＮＨ＋４－Ｎ、ＮＯ－２－Ｎ及ＣＯＤＭｎ的平均去除率比传统工艺分别提高了２４．５％、３０．０％、５８．５％、７０．０％和２７．５％，除污染效果明显优于传统净水工艺；并且可节约矾耗５０％以上和氯耗７７％左右．
In view of the pollution status of Yaojiang water source and the disadvantages of the traditional traditional water purification technology such as low pollution efficiency and large drug consumption, the traditional water purification technology of Meilin Water Treatment Plant in Ningbo was improved and the pollution removal efficiency before and after the improvement was improved Comparative experimental study. The results showed that when the water quality of Yaojiang River was pH6.5-7.6, the turbidity was 7-20NTU, the color was 25-37, the NH + 4-N0.25-9.0mg / L, the NO-2-N0.025-0 .25mg / L and CODMn6-18.9mg / L, the average removal rates of turbidity, color, NH + 4-N, NO-2-N and CODMn in the improved biochemical process system were respectively increased than those in the conventional process 24.5%, 30.0%, 58.5%, 70.0% and 27.5% respectively. The effect of removing pollution is obviously better than that of traditional water purification process; moreover, it saves about 50% of alum consumption and about 77% of chlorine consumption .