An experimental investigation was carried out for the treatment of diary wastewater using low cost adsorbents. The peels of orange and banana were used as adsorbents in this study by carbonization and dehydration (biosorption) methods and the effect of pH, contact time, adsorbent dosage, and adsorbent particle size in removal of pollutants present in diary wastewater was evaluated. The studies showed that the orange peels are more effective than the banana peels in the removal of pollutants from the dairy wastewater. The carbonization method is found to be more efficient than the de-hydration method for both, orange and banana peels, the orange peel found to be more efficient in both methods with the highest percentage removal of 50.1% and 14.3% respectively compared to the banana peels where the percentage removal are found to be 44.1% and 8.2% for the carbonization and de-hydration methods respectively. The optimum pH for both methods, orange and banana peels found to be in a range between 6-8. The optimum contact time for de-hydration method of orange peel and carbonization method of banana peel is 120 min and for de-hydration of banana peels and carbonization of orange peel is 150 min. The optimum adsorbent dosage for the dehydration method of orange peel is 0.15 g and for banana peel is 0.25g. The optimum adsorbent dosage for carbonization of orange and banana peel is 0.3g and the optimum particle size for methods, orange and banana peels are 300μm. The results were validated using Langmuir and Freundlich equations.