Research results concerning the influence of thermo-chemical processing of excessive sewage sludge on changes in concentration of organic carbon compounds in obtained hydrolysates, described by such parameters as ChZT, OWO and LKT. Two series of research were conducted, in which samples of excessive sludge (containing 1% sm and 5% sm) were processed in temperatures of 115, 135 and 175 °C, earlier having been alcalized with sodium hydroxide in the dose of 0,4g NaOH/g sm.
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