Control systems applied to analyze the environmental aspects in the activity of a wastewater treatment plant

The purpose of this paper is to show how the control systems allowed us to investigate the environmental aspects of a wastewater treatment plant. The aim of this analyze is to optimize the process in terms of quality, costs and environmental impact. The first step is to define the activity as a sum of processes according with ISO 14001 Standard aimed to identify the interaction between this processes. To do this it must be established the flux diagram of the wastewater treatment plant activity. The second step is to describe the control system of a wastewater treatment method based on Dissolved Air Flocculation (DAF), used to treat the waste waters, results from the locomotive repairs activity. A case study on a pumping station illustrates the influence of the control system on this activity. All these sentences were made with environmental tools like: ad-hoc methods and control list methods, Environmental Systems Analysis (ESA) tools, critical synthesis of the processes and theirs modeling, observation and the experiment and statistic calculus. The result of this work has a practical implementation as a work procedure in the control quality of the activity. The theme is completely original and actual.