Abstract
Water heater manufacturing represents one sector of household electrical appliance industry. It includes several batch processes which resulted in a highly polluted wastewater as shock loads. The objective of this study was to manage the shock loads wastewater with a simple and cost-effective approach prior to final discharge into municipality. To achieve this objective, two approaches were studied. The first approach was the chemical treatment of the accumulated shock loads wastewater using alum and an anionic polymer. Although this approach produced a very high-quality effluent, it was economically and technically infeasible. The second approach was a controlled release of the shock loads to the normal daily discharge in a way that guarantees the compliance of the end-off-pipe with the National Regulatory Standards. This solution required establishment of an equalization tank for normal daily flow and a holding tank for controlled release of the shock loads. Mathematical calculations were carried out to determine the most violating parameters in order to calculate the mixing ratio the of shock loads with the normal daily flow. Full engineering design of the proposed solution was carried out. This approach was implemented and proved to be simple, easy to operate, cost-effective and can be replicated in similar batch processing manufacturing plants.
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The authors would like to thank Eng. Yaser Sherif, the Head manager of Environics Egypt Company for his financial support.
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Abou-Elela, S.I., El-Shafai, S.A., Fawzy, M.E. et al. Management of shock loads wastewater produced from water heaters industry. Int. J. Environ. Sci. Technol. 15, 743–754 (2018). https://doi.org/10.1007/s13762-017-1433-9
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DOI: https://doi.org/10.1007/s13762-017-1433-9