ملخص الدراسة:

Oxidation ditch (OD) is a common activated sludge method for wastewater treatment. The control of oxygen supply for this type of wastewater treatment is of great importance in controlling the treatment efficiency. The European Hospital (EH) in Gaza strip suffers from the same problem. Therefore, the main objective of this research is to produce a control model for the oxygen supply and treatment efficiency of this treatment plant. The methodology followed in this research comprised data collection on the wastewater treatment plant and building a control model using (MODELICA) object oriented programming language. The results from the model required are the oxygen concentration and organic matter concentration (BOD5 concentration) proved to be responding to the control process induced on the aerator. For example, when the rotational speed of the aerator was increased from 0 to 1460 rpm the oxygen concentration increased from 0 to 2mg O2/L and the organic matter was reduced from 290 to 20 mg BOD5/L. Similar results were obtained when different aerator rotational speeds were used. It is concluded from this work that Modelica is a suitable Model for the oxidation ditch process control. In addition, it is concluded that controlling the aeration system in OD has a significant effect in improving the treatment process.

توثيق المرجعي (APA)