Sewage sludge decontamination and methods of its control

Abstract

In the article it was considered a problem of urban sewage sludge decontamination and meth-ods of its control. It was estimated the efficiency of sludge decontamination under CaO and mi-crowave treatment on the base of determination a total quantity of coliform, thermotolerant coli-form bacteria, mesophilic aerobes and facultative anaerobes, helminth eggs. It was shown that the level of sewage sludge decontamination under microwave treatment at specific energy consumption 0.1 kW·h/kg decreased the amount of sanitary indicative microorganisms, helminth eggs till nominative meanings allowing using non-toxic sewage sludge as fertilizers. It was proposed a biocalorimetric express-method for estimation of sewa ge sludge decontamination that makes it possible to decrease the labor treatment and time of their safety analysis. Comparative estimation of sludge decontamination efficiency showed that MAFAnM index and cell’s heat production are well correlate between each other. It decreases time of sewage sl udge safety analys is from 3 days to 20 min.