Physico-chemical Investigation On Dumpsite Leachate
[A CASE STUDY OF ILORIN METROPOLIS]

55 percent of all refuse is stored in landfills. 14 percent is burned, and 31 percent  recycled. The EPA recommends recycling to save natural resources, protect the environment, and decrease the need for landfills. Encourage recycling by keeping bins handy in the home and avoid throwing  hazardous waste in the garbage. Hazardous household waste (medications, chemicals, automotive supplies, fertilizers, insect/rodent killers, etc.) should only be disposed of according to instructions or taken to a government-sponsored hazardous waste disposal facility or event.   
2.2 Landfill Types
Landfill can be classified into four main types, such as sanitary landfills, municipal solid waste (MSW) landfills, construction and demolition waste landfills, and industrial waste landfills.

2.2.1 Municipal Solid Waste (MSW) Landfills
The main reason for solid waste generation is always human activity. Waste is material perceived to have little or no value by society or consumers. Nearly, all human activities produce waste (Kumar et al., 2004).
 Solid waste contain all types of waste generated by the different types of sources such as domestic wastes (DSW), construction and demolition (C&D), industrial and agricultural wastes. Household solid waste (HHSW) is the remains of food like grease, fats, bones, skin meat vegetables, fruits, grain etc. which are from animals and plants. It also contains paper, textiles, glass and empty refreshment cans. HHSW also include restaurant and hotel wastes. In addition it includes waste from street sweeping, septic tank pump, construction and demolition work and sludge from wastewater treatment plant (AL-Meshan & Farahat, 2002). On the other hand commercial solid wastes include paper, cartons, wood, tires, used oils, used furniture and electronic appliances such as refrigerators and heaters etc. The sources of commercial wastes are stores, commercial malls,  markets and organization of the governmental and private companies (Burnley, 2007).
Municipal solid waste can also consist of toxic substances (paints, pesticides, used batteries, medicines), compostable organic matter (fruit and vegetable peels, food waste) and soiled waste (blood stained cotton, sanitary napkins, and disposable syringes). Some of the municipal solid waste can be recycled, for example (plastic, glass, paper, metals, etc.) (Jha et al., 2003).  Solid waste generation increase due to the population growth in both industrialized and developing countries (Alam et al., 2008).
 2.2.1.1 Generation
Solid waste problems are managed in most developed countries through proper waste management which includes a lot of different techniques. Good environmental awareness among the people in developed nations, with stringent regulations and enforcement, and committed participation has enabled the improvement of waste management and reduce the waste generation. Malaysians generated around 26,000 tonnes MSW every day (Agamuthu, 2008).