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

Abstract

Egypt is one of the countries that is expected to face future water scarcity. So, searching for alternatives water resources for reuse in irrigation purposes became an essential aim. So, 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 ration of 30 %. Four treatment units were performed to get high-quality wastewater. The flocculation tank was the first unit where alum was added as coagulant with a dose of 3 mg/l and HRT of 0.5 hr. then wastewater was passed 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. Finally, wastewater settled in the final settling tank for 2 hr. After analyzing the results, the effluent from the first trial where FBR packed with Concrete wastes was more effective than FBR packed with marine sponges in removing COD and BOD concentrations with removal efficiency 90.7 %, and 91.47%. on the other hand, FBR packed with marine was more efficient in removing TN and TP with a removal efficiency of 82.9 %, and 68 % if compared to the first trial. Also, effluent from both experimental trials was suitable to be used for fruitless irrigation as the concentrations of effluent wastewater were below the allowable limitations of law 92 for 2013.