Abstract
The combined approach principle involves reducing water pollution from point and diffused sources. The objective of the combined approach is to reduce water pollution. The combined approach principle considers the quality of wastewater discharged into the receiver and their impact on the receiver. The methodology involves determining the flow of the receiver and effluent flow as well as determining the emission limit values (load of pollutants in the effluent). According to the type of receiver and depending on the discharge of effluent into streams, stagnant or into transitional and coastal waters, daily and annual load values permitted shall be determined. However, to obtain accurate values modelling methods must be used whose combined approaches solve the system of differential-difference equations.
Highlights
The combined approach principle has been defined by the Article 58 of the Water Resources Act (NN No 153/09, 63/11, 130/11, 63/11, 130/11, 56/13 and 14/14)
In order to make the systems work in optimal conditions that are based on the concentrations of pollution data, receiver flow and effluent flow changes with time
Searching the literature examples were found of using a combined approach, the main innovation and originality of this research, is that the original equation of the combined approach converted into system of differential equations, and to observe changes in the concentration and flow depending on the time
Summary
The combined approach principle has been defined by the Article 58 of the Water Resources Act (NN No 153/09, 63/11, 130/11, 63/11, 130/11, 56/13 and 14/14). Statistical and algorithmic presentation systems, allows exploring the legality of the system behaviour, as well as the interdependence of its entities and the development of systematic dynamics model of the system. In this way, simulation modelling is a powerful tool for analysing the state system, alignment parameters and the selection of the appropriate mode of operation of environmental systems. The designing of a conceptual as well as a mathematical model was required These models can show the reduction in the observed pollutants concentration, by using the systems of differential-difference equations for the purifiers considered, along with function equations for each substance. After purification (activity), wastewater (entity) waiting to be released in receiver (waiting satisfying flow of receiver)
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