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Protection of environment is a worldwide problem. Generation of organic waste is increasingand strategies for its environmentally sound use must be developed and optimised.Accumulation of great quantities of organic wastes leads to the serious environmentalproblems: polluted water, contaminated soils, polluted air and solid wastes. Waste watertreatment plants produce in large quantities sewage sludge. Among the different types ofmunicipal organic wastes sewage sludge is the main product.Wastedoi:10.15626/eco-tech.2005.011 fatcat:sip4hthspfdjbjfb672uanm3qy