FIELD: waste conversion. SUBSTANCE: waste activated sludge is preliminarily compacted and dewatered, after which danger grade is established from chemical analysis of organic- and inorganic-origin toxicants. If sludge corresponds to danger class IV, it is spread on destroyed ground surface in amount 300-400 t/ha (calculated for solid material) in autumn period and, before winter, it is ploughed into surface ground layer to a depth of 30 cm. EFFECT: enhanced economical efficiency and improved environmental condition. 7 tbl
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