COD Reduction and Decolourisation of Distillery Waste Water by Natural Adsorbent
Keywords:
Natural Adsorbent, Sugarcane Bagasse Distillery spent wash, wastewater Treatment, Fenton reagent.Abstract
The capacity of Sugarcane Bagasse by hydrochloric acid or caustic soda on the elimination of heavy metal from aqueous solution was investigated. The experimental work was carried out at room temperature and the influence of pH, contact time and Bagasse mass was determined. Sugarcane Bagasse was found better treated efficiency by alkaline than chloride solutions. Distilleries generate huge amount of acidic, recalcitrant and colored wastewaters with high organic content. The dark brown color of distillery wastewater is mainly due to the high molecular weight organic compounds called melanoidin. Activated carbon is a well-known adsorbent due to its extended surface area, microporus structure, high adsorption capacity and high degree of surface reactively. Among the physicochemical treatment methods, adsorption on activated carbon is widely employed for removal of color and specific organic
pollutant. As contact time increase the adsorption of COD and decolorization also increase. The maximum adsorption is noticed at contact time of 3-3.5 hours. The percentage of COD reduction and decolorization as function of the pH for a mass of adsorbent made from bagasse of 10 g/L and a time of contact of two hours. The percentage of COD reduction and decolorization increases with the pH. The largest adsorption of each and every metal ion occurs at pH range between 5 and 6. The percentage of adsorption of distillery waste water color and, the mass of Bagasse varied from 2 to 20 g/L, the pH of the solution being maintained to 5 with a contact time of two hours.
