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Sewage sludge ash, a by пїЅ product of municipal sewage sludge thermal utilization, is one of the complex anthropogenic and potentially useful materials. The innovative proposal of sewage sludge ash usage is to use it as a raw material for synthetic zeolites. This article shows results of zeolitization of sewage sludge ash by the direct hydrothermal method and the indirect fusion method. Zeolitization of sewage sludge ash was conducted at the activation time of 12 hours, the activation temperature of 60oC, the cry...