Codisposal of Garbage and Sewage Sludge--A Promising Solution to Two Problems

The process of using thermal techniques in the codisposal of sewage sludge and municipal garbage was examined in order to determine why the implementation of codisposal has been limited. Codisposal is the integrated processing of garbage and sewage sludge through burning in which garbage is used as a fuel in sludge drying. The volume of both wastes requiring ultimate disposal is greatly reduced. Two basic codisposal approaches exist: one uses garbage incineration equipment, while the other uses the combustible portion of processed garbage as the auxiliary fuel source in sludge incinerators. Coincineration in garbage burning incinerators appears to be the most developed of the technologies.