Sewage sludge composting

Sewage sludge is formed during mechanical, biological and chemical sewage t reatment. Composition of the sewage sludge is very complicated; it is rich in micro- and macroelements, but the sludge can contain toxic compounds and pathogenic organisms. There exist a large variety of methods of neutraliza tion of the sewage sludge. The present work describes the sewage sludge treatment methods and pays spe cial attention to non-industrial methods of neutralization of the sewage sl udge.