Innovative System for Recycling of Backwashing Water in Drinking Water Plant | ||||
| Egyptian Journal of Chemistry | ||||
| Article 77, Volume 63, Issue 3, March 2020, Page 885-895 PDF (1.6 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2019.12186.1762 | ||||
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| Authors | ||||
Hussein Ibrahim Abdel-Shafy   1; Mohamed A.I. Salem2; Mohamed A. El-Khateeb3; Mona S. M. Mansour4; Nancy H Abdel-Shafy5
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| 1Water Research & Pollution Control Department, National Research Center, Dokki, Cairo, Egypt | ||||
| 2General Manager, Serabium Wastewater Treatment Plant, Ismailia, Egypt. | ||||
| 3Water Pollution Department. National Research Centre, Dokki, Cairo, Egypt | ||||
| 4Analysis & Evaluation Department, Egyptian Petroleum Research Institute, 1 Ahmed El-Zomor Street, Nasr City Cairo. Egypt. | ||||
| 5Environmental Studies, Miami, Fl., USA | ||||
| Abstract | ||||
| THE PRESENT study focuses on the efficiency of a suggested innovative system for the treatment of the sand filter backwashing water (SFBW) in the Drinking water treatment plant (DWTP). Usually, the DWTP is consumes between 15 to 20% of their clean treated drinking water to backwashing their sand filter. Such sand filter backwashing water (SFBW) is, usually, discharged as waste. Presently, the suggested innovative system as pilot plant (PP) was employed for the treatment of SFBW. Physical and chemical characteristics of the raw Canal fresh water and the treated drinking water were extensively determined via sampling program. Meanwhile, the inlet SFBW and the treated outlet of the suggested PP were also sampled and subjected to the physical and chemical analysis. The settled particles as sludge of the PP were sand filtered. The filtered water was also evaluated in terms of the physical and chemical characteristics. The suggested PP was operated continuously where it proved efficient removal of TSS, turbidity, and aluminum at 74.1, 84.2 and 71.4%, respectively. Removal of total residue, and alkalinity reached 30.1 and 29.1%, successively. The residual Al3+ was 3.0 mg/l. Correlation between the physical and chemical characteristics of Canal water in one hand and the treated SFBW and the filtered water of the sludge on the other hand indicated that both later waters were at better quality than the former. Therefore, it was suggested to reuse this treated effluents as an additional fresh water resource to the DWTP. The advantages are: saving this wasted water, save the intial supply of water to the DWTP, and to decrease the amount of added alum to the water treatment system while protecting the Canal water from the dischrge of the SFBW that contained residual of Al3+. | ||||
| Keywords | ||||
| Backwashing water; Chemical and physical treatment; Drinking water treatment plants; Drinking water treatment; Innovative water treatment system; Sand filter; Water reuse | ||||
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