Jinan City Secondary Water Supply System, The Status Quo Of Water Quality Protection And Countermeasures

With increasing of the large building in city, building water engineering develops along the big flow and high pressure, which insult in the increasing of second water supply system, nevertheless along with which the sever pollution of second water supply system, the decline of drinking water quality and all kinds of sever water pollution sometimes happen, this condition influences the health of people greatly, the conflict between which and the increasingly need of water quality with the development of standard of living increased. There are some questions in Jinan, as the capital of Shandong province, though the administration of second water supply in Jinan is ahead of the country.The research educes status of the water quality about current second water supply system in Jinan by overall investigation of protection about second water supply system in Jinan and sampling inspection of water, the protection of second water supply system in Jinan is not optimism. The research point that erosion of pipe network, scale, propagation of microoganism, byproduct of chlorine residual, environment second pollution and seepage of anticorrosive are primary reasons causing water quality pollution of second water supply system. The research emphasizes compare of techo-economy about second disinfection measure and point ultraviolet disinfection tank, automatic clean disinfection facility are more adaptive disinfection measures by compare of mechanism, effect, equipment, technical demand, management level about ultraviolet, chlorine dioxide, sodium hypochlorous, ozone, micro-electrolyze. The research studies affect of the hydraulic characteristic of storage equipment to water quality and put forward hygienical limit HRT to storage equipment by mathematics model. The research puts forward corresponding tactics about design, material, storage equipment, management on water quality pollution of second water supply system in Jinan.