The main objective of this work is to evaluate the performance of four different types of biochars in removing heavy metals from synthetic solution. Four types of biochars are investigated in this study, namely; jazaurin, ficus, orange, and mango biochars. A pilot plant is set up to investigate the efficiency of these biochars as a filter media for synthetic solution treatment. The removal efficiency of different heavy metals is assessed by a four-column pilot plant under different parameters; mean particle size of biochars, initial metal concentration, hydraulic load, and time. Results indicate that the different types of biochars used in this study show high performance in removing the different types of heavy metals utilized (Copper (Cu), Cadmium (Cd), Lead (Pb), and Zinc(Zn)). The removal efficiencies of these heavy metals are more than 99% for all types of biochar. It is concluded that using biochars as a filter media could be an effective solution for removing heavy metals from industrial wastewater in the environmental conditions of Egypt.
River Nile (Rossita Branch) receives massive quantities of untreated or inadequate municipal wastewater, industrial and agricultural wastewater through El-Rahawy drain. Consequently, the objective of the present study was to design a system depending on biological treatment followed by Fenton reaction for treatment of El-Rahawy drain wastewater. The physicochemical and bacteriological parameters were estimated for El Rahawy drain wastewater and treated effluent of the drainage wastewater. The samples were collected after 24h and after the fourth day of the treatment. The bioaugmented bacterial consortium that used to enhance the biological treatment was nonpathogenic and eco-friendly, and the inoculated dose was 10 gm/m 3 /day. The removal efficiency of TDS reached 58.9% and 68.6 % by biological treatment after 24 h and 4 days. While the removal % of TDS reached 75.9% after 24 h of Fenton treatment, and this efficiency removal declined to 66.6% on the fourth day of the treatment. The removal efficiency of COD reached 33.3 and 56.8% after 24 h and 4 days of the biological treatment. Whereas the removal % of COD reached to 80% after 24 h, and this removal % declined to 78.8% after 4 days of Fenton treatment. The physicochemical and bacteriological parameters were declined by the treatment time increase. It was found that, the bioaugmented bacterial strains are able to grow well and produce more biodegeding enzymes after 24 h. Moreover, the biological treatment followed by the Fenton reaction is the most suitable solution for El-Rahawy drain treatment
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