Most designs of conventional industrial water supply networks considered only optimization of single water quality index of mono or multiple water resources but not that of multiple water quality indexes

multiple water resources

and corresponding pretreatment system. A superstructure model of industrial water supply network of multiple resources was proposed and mathematical models of pretreatment system for water resources were developed. Considered water quality of different water resource

water production rate of related pretreatment system

and removal ratio of water quality

industrial water sinks were classified into several groups with constraints of multiple water quality indexes. Water supply network of a coastal oil refining enterprise was studied by solving mathematical model with commercial software GAMS. The results show that the optimal water supply strategy for this company is combination usage of surface water

municipal treated wastewater

and ground water

excluding usage of municipal and sea water. The total annual cost for this optimized water supply network is 6.3842 million yuan.