Multiple Storage Vessel Background

Multiple contaminant wastewater minimisation was dealt with in Chapter 6 wherein it was assumed that there were no compatibility issues with wastewater produced containing different contaminants and that all the contaminants present in the system could be mixed. However, in certain instances this is not the case. Such instances arise when there are different contaminants in each stream that cannot necessarily be mixed, or there is a unit that can only receive wastewater contaminated with a certain contaminant. In such instances it would be advantageous to have 

The model is derived to take into consideration the possibility of multiple storage vessels which are dedicated to the storage of certain wastewater. The formulation shares some of the characteristics of the multiple contaminant model presented in the previous chapter. This is due to the fact that both formulations have roots in the scheduling methodology derived by Majozi and Zhu (2001). Furthermore, the uneven discretization of the time horizon is used as the time representation. 

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