Study of effect of pig manure treatment method on emission of odor-forming substances

Abstract

During operation of livestock complexes in small spaces, a large amount of animal excretions (feces, urine and undigested food) is generated, which can lead to air pollution, constant smell and release of toxic gases. With increase in productivity of complexes, complaints from residents of settlements located in the immediate vicinity of the facility increase, and pig breeding complexes in this case are no exception. Unpleasant odor is a powerful irritating factor having a significant negative impact on the life and health of people living near livestock complexes, which reduces their living standards. Often, the need to constantly monitor presence of unpleasant odor is the limiting factor for modification, expansion of existing pig farms or creation of new ones, as well as for increasing their productivity and profitability. In this research, studies were carried out for selection of chemical reagents composition for the purpose of deodorization and neutralization of liquid manure runoff at pig-breeding complex. It has been determined that composition based on ammonium persulfate with peracetic acid and formalin, as well as a composition based on sodium nitrite with ammonium molybdate (a high deodorizing effect was maintained after 21 days of exposure to the moment of introduction of reagents into manure) was the most preferable in terms of maintaining the disinfecting effect and suppressing bad odor over the long term. The manure mixtures obtained as a result of such treatment do not pose danger to the environment and can be used as the main component of complex organomineral fertilizers.