EVALUATION OF DAIRY EFFLUENT DETOXIFICATION AND REMOVAL EFFICIENCY IN AN INTEGRATED WASTEWATER TREATMENT SYSTEM USING LOW-COST ADSORBENTS

Abstract

Dairy effluent typically contains lipids, lactose, and whey proteins, all of which contribute to a rise in biological oxygen demand, chemical oxygen demand, and other water parameters. Physicochemical characteristics of wastewater can be reduced by biological, chemical, and Physicochemical treatments. The adsorption technique is attractive for the removal of organic compounds in wastewater among the numerous Physicochemical treatment methods. Two low-cost adsorbents were chosen for this work, and a comparative analysis was performed. The goal of this study was to find a new application of rice husk ash and sugarcane bagasse ash. When rice husk ash and sugarcane bagasse ash were employed, the removal of organic pollutants, biological oxygen demand, chemical oxygen demand and other parameters from dairy effluent were evaluated and compared. The organic pollutants, color, biological oxygen demand, and chemical oxygen demand have all been removed from dairy effluent using rice husk ash and sugarcane bagasse ash as adsorbents. At room temperature, rice husk ash adsorbents were reported to remove up to 73.11 % of biological oxygen demand, with a maximum dose of 800mg/L, whereas sugarcane bagasse adsorbents were removed 78.17 % with the same dose. The Chemical oxygen demand removal efficiency was also evaluated and compared to rice husk ash and sugarcane bagasse ash which were 89.12% and 81.23%, respectively with a dosage of 800 mg/L at 7.4 pH.