الفهرس 
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Abstract
This study aimed to investigate the most effective treatment technique for the wastewater generated from two food processing factories to be reused according to Egyptian standards. The discharged wastewater from the two factories was highly polluted by organic load. As presented by average chemical oxygen demands (COD) value of 4950 mg O2 L-1 for the first and 9189 mg O2 L-1 for the second factory.
Three treatment scenarios were investigated for the first factory effluent to select the most appropriate module for reuse of wastewater. Chemical coagulation-flocculation followed by adsorption onto granular activated carbon (GAC) achieved 84% of COD removal. The Fenton oxidation followed by adsorption onto GAC achieved COD removal of 91%.The Aerobic treatment followed by adsorption onto GAC reached to 92% COD removals.
For the second factory, three treatment scenarios were investigated to select the most appropriate module for reuse of wastewater. Fenton oxidation followed by Aerobic treatment achieved 90.2% of COD removal. The Anaerobic treatment followed by Aerobic treatment achieved COD removal of 92%. The Electro-coagulation followed by Aerobic treatment reached to 97% COD removals.
The quality of treated effluent using the previous modules for the two factories was in agreement with the required values stated in Egyptian code for reuse in agriculture (Grade D). For reuse in agriculture according to Egyptian code for reuse (Grade A), integration of the studied different treatment modules for the first factory effluent in the form of sedimentation then chemical coagulation-flocculation followed by aerobic treatment then sandwich filter using adsorption/filtration (Sand/GAC/ Sand) produced water quality complying with the Egyptian code for reuse in agriculture with COD removal of 99.8%.