Mechanism of Leachate Formation Pollutant and Category

Solid waste management is becoming more and more difficult. Finding a solution that is both affordable and environmentally friendly is a challenge for many nations. When water undergoes filtering downward through a landfill, it collects dissolved components from the decaying waste and creates leachate. The leachate may be either safe or extremely harmful depending on the properties of the landfill and the waste it houses. An initial aerobic phase, an anaerobic acid phase, an initial methanogenic phase, and a stable methanogenic phase are the minimum stages of decomposition that landfills go through. Leachates may contain considerable concentrations of heavy metals, inorganic salts, ammonia, halogenated hydrocarbons suspended solids, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), and organic pollutants in huge quantities. Also abundant in it are phenol, nitrogen, and phosphorus. Due to its propensity to seep into soils and subsoils and seriously pollute receiving waters, landfill leachate could be a significant cause of surface and groundwater contamination if it is not properly handled and disposed of. Therefore, throughout the past few decades, pollutant reduction from leachate treatment has gained substantial attention.