الفهرس | Only 14 pages are availabe for public view |
Abstract Water scarcity is a global concern that threats all life aspects, especially human life so, searching for a way to minimize the negative effects of water scarcity is the golden solution. This goal was achieved by searching for alternative water sources such as treated wastewater to reuse it besides freshwater resources in different fields such as irrigation. In this study, a fixed bioreactor was used as a simulation of the biological treatment technology depending on agricultural wastes instead of high-cost plastic media. A laboratory scale-pilot consist of three rectangular tanks with dimensions of 70×50×30 cm was established to perform the suitable treatment of pasta wastewater. The pilot began with a primary sedimentation tank followed by FBR (Fixed Biofilm Reactor) tank, after that water was fed into a final settling tank to remove inorganic substances produced from the treatment process. Banana stem and Rice straw were used as bio-carriers with a filling ratio of 25% to increase the microbial population inside the FBR tank. After analysing the physiochemical parameters of pasta wastewater, the final COD, BOD, TSS, TN, and TP concentrations of pasta wastewater after the final settling tank in case of using banana stem were 37.3, 28.6, 42.4, 5.9, and 0.22 mg/l, respectively. In the case of using rice straw as a packing media, the final COD, BOD, TSS, TN, and TP concentrations were 78.6, 63.4, 49.9,7.1, and 0.31 mg/l, respectively. It was proved that using banana stem was more effective than rice straw in reducing pasta wastewater pollutants, and the final effluent was suitable to be used for Fruitless irrigation as the final concentrations were below the allowable limitations of Egyptian code for the use of treated wastewater in agriculture, code No. 501/2015. |