Wastewater treatment plants are large non-linear systems subject to large perturbations in flow and load, together with uncertainties concerning the composition of the incoming wastewater. Nevertheless these plants have to be operated continuously, meeting stricter and stricter regulations.
As the environmental legislations imposing stricter effluent standards, more complicated methods for design, operation and control of wastewater treatment plants are needed. As a result, mathematical models have been developed and widely used to assist design and operation of wastewater plants. Advances in computer science have also enabled complicated mathematical models developed for the design of such complex systems. Mathematical methods have been shown to mimic the behavior and predict the performance of full-scale plants with reasonable accuracy. With mathematical models, it is now possible to test alternative operational strategies for full-scale plants without going through laboratory studies on pilot plants. Moreover, mathematical methods have also been widely used in optimization studies that lead to cost-effective operational strategies, for trouble-shooting and upgrading of existing biological treatment plants.
For design and performing of further operation of WWTP in optimum mode of deep purification from organic substances, nitrogen and phosphorus, we provide mathematical methods to model wastewater treatment systems.