Application of Building and Aquatic Wastes within a Cage as fixed bio-reactor beside micro-sand Technology to reuse the Pepsi industrial Wastewater for Irrigation Purposes

Document Type : Research articles

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Department of Civil Engineering, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.

Abstract

Egypt is one of the countries that is expected to face future water scarcity. So, searching for alternative water resources for reuse for irrigation purposes became an essential aim. So, the treatment of wastewater produced from the industrial sector, especially soft drinks is considered to be the golden solution to provide massive amounts of water instead of direct disposal into the drains which affects negatively the surrounding environment. In this paper, a fixed biofilm reactor (FBR) was used as a biological wastewater treatment with some modifications. New bio carriers were used instead of the conventional, high-cost plastic media such as construction wastes (Concrete) and aquatic wastes (marine sponges) with a filling ratio of 30 %. Four treatment units were performed to get high-quality wastewater. The flocculation tank was the first unit where alum was added as a coagulant with a dose of 3 mg/l and HRT of 0.5 hr. then wastewater influent to a micro sand filter. The main treatment unit was the FBR tank where biodegradation of bacteria was operated for HRT of 12 hr. and 24 hr. The effluent from the FBR unit was allowed to settle in the final settling tank for 2 hr. The effluent quality from FBR packed with Concrete wastes was much better than effluent from FBR packed with marine sponges in removing COD and BOD. The removal efficiency reached up to 90.7 % and 91.47%. respectively. On the other hand, FBR packed with marine sponges was more efficient in removing TN and TP with a removal efficiency of 82.9 %, and 68 % respectively. 

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