Scheduling constraints wastewater reuse

The first scheduling constraints considered are binary variable constraints governing wastewater reuse. These constraints ensure the correct reuse of water, since water is only reused in distinct amounts at certain points in the time horizon. 

Scheduling constraints also have to be derived to ensure the time at which wastewater reuse occurs is correct within the time horizon. 

Following the task scheduling constraints are the constraints dealing with the scheduling of the direct recycle/reuse of wastewater. 

The constraints used for the scheduling of the recycle/reuse in the model are similar to those used in the previous multiple contaminant wastewater minimisation methodology, (see constraints (6.31), (6.32), (6.33), (6.34) and (6.35)). Again, the reader is alerted to the fact that the following constraints apply to water using operations, i.e. they are not as generalised as in Chapter 6. This is due to the fact that... 

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