Ammophos efficiency application for treatment highly concentrated by biogenic elements wastes of agro-industrial complexes

Abstract

Research findings are made of reagent treatment processes of highly concentrated liquid wastes at pig farms in agro-industrial clusters (AIC) for the purpose of obtaining organo-mineral fertilizer and water for irrigation and increasing the fertility of agricultural lands. The research objective was to study the process of reagent fractionation of highly concentrated by nutrient elements liquid wastes of pig farms, with the replacement of the existing superphosphate reagent by more effective nitrogen and phosphorus. The main processes of liquid waste separation into fractions, determination of optimal reagent doses, comparison of results of different reagents use and recommendations are studied. Optimal portioning of ammophos suspension for treatment of highly concentrated waste was established and determined by the effect of separation into fractions. Researches were carried out at Platov South-Russian State Polytechnic University (NPI) in Novocherkassk. The usage of ammophos for fractionation of highly concentrated liquid waste of livestock farms, is to use as an acidifying reagent ammophos suspension, reducing the retention time in wet pits, as well as reducing reagent doses by more than 2 times, compared with superphosphate. The efficiency of waste separation was provided with the usage of ammophos and superphosphate was compared, optimal doses of ammophos suspension -0.5-1.5 g/dm3. The dependence of the separation efficiency of liquid waste as a function of its temperature was studied, the kinetics of separation at increasing temperature increases in the range from 20-45 0C. The greatest effect of separation of liquid waste was observed at a temperature of 450C, but the separation efficiency, ranging from 20 to 45 0C varies slightly. Nevertheless, it was accepted that the optimal temperature for reagent processing of highly concentrated liquid waste from pig farms of agro-industrial clusters was 20-25 0C.

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