Biomass Resource of Domestic Sewage Sludge

Abstract

Experimental studies on the decontamination and stabilization of sludge beds were conducted using the “Desolac” product, which is a calcium oxide treated with ovicide. As a result of the study, it was established that the sewage sludge of the sludge beds of the MUE “Lipetsk Aeration Station” and “LOS” LLC in Voronezh are safe and can be used as organic fertilizers for the use in grain and industrial crops, as well as in vegetable production. Studies have been conducted to determine the efficiency of sewage sludge from the Left-bank sewage treatment plants in Voronezh and sewage sludge treated with “Desolac” for soil fertility and productivity of winter rapeseed Adrian. Determining the content of macronutrients of mineral nutrition in the soil and the reaction of the soil environment showed that the introduction of organic fertilizers in the form of sludge compared to the version without fertilizers increases the content of nitrate nitrogen, exchangeable potassium, labile phosphorus in the soil. At the same time, the mass fraction of impurities of toxic elements in the soil decreases with the introduction of sewage sludge as organic limestone fertilizer.