Management and optimization of Injection rate of chlorine in water distribution networks using water Gems v3/0

Drinking water is disinfected in different ways. The most common and cheapest one is chlorination whose most important issue is place and rate of injection which should be selected in such a way that the rate of chlorine remained in all parts of an urban water distribution network are standard and the related expenditures are minimal. Performing a program for two distribution networks of urban water, this paper aimed to analyze and compare the rate of chlorine remained in the taps and the amount of chlorine used in different parts of the network.

In order to model the network, the water Gems v3/0 was used and two networks were modeled and designed in the form of gravity and direct pumping.

solving the two practical models of water supply networks by software, the efficiency of these networks was revealed to determine the optimum injection rate of chlorine. The findings indicated that the residual amount of chlorine in 62% of the taps of direct pumping network is near to standard and 100% of that of gravity network is less than standard. In addition, the amount of used chlorine in direct pumping network is 6/5% less than that of gravity one.

this study revealed that the optimization of chlorine injection into the networks having direct pump, in comparison with the gravity distribution networks, is more possible and needs less chlorine.