Experimental investigation on biogas recovery and treatment of leachate

The major issue in municipal cities is solid waste generation. Landfilling is one of the techniques for disposal. Though there are advantages in disposing of the waste, it also creates some long-term effects on the surroundings such as Leachate, unwanted gas emissionsto solve these issues, we made a solution to the problem. The unwanted gas containing 70 to 80% of Methane is collected by the Biogas digestion process. We experimentally made a small budget biodigester by using waste material and equating a relation of how much gas can be collected at a certain range of wastes. Another important issue is called Leachate, which pollutes the groundwater at great levels, especially nitrates in higher amounts can cause “Blue baby syndrome”. This can be treated by an efficient method called the Solar photo-catalytic process, which comes under the Advanced Oxidation Process (AOP) and Denitrification process. TiO2 is an excellent photocatalytic oxidation material. It can also absorb sunlight in a wider spectrum. The experiment was carried out with the different amounts of concentrations of TiO2 salts which is in dosage of 1.0, 1.2g, 1.5g, 1.8g, 2g/500ml. The Photocatalytic experiment was conducted under 5hrs for each sample collected. The denitrification process by using iron fillings (waste scraps from Industries) as a filter media that can remove nitrates is also experimented. Finally, at certain values of obtained BOD, COD, Nitrates, Dissolved oxygen, Turbidity, etc found, the removal efficiency results are discussed and tabulated. Based on the results the suggestions to the control of leachate by our treatment plants and innovative solutions in low cost are adopted.