Possibility of reduction of ammonia emissions from manure storage piles

Abstract

According to the Gothenburg Protocol to abate acidification, eutrophication and ground-level ozone ammonia emissions need to be reduced by 40% in manure storage systems. An abatement of ammonia emissions, suggested in this paper, is based on application of the biotechnological agent Amalgerol. Ammonia emissions from farmyard manure storage piles from broiler and pig breeding were compared in order to verify the reducing potential of the applied biotechnological agent. The experiments carried out under operating conditions proved a positive influence of biotechnological agents on ammonia emissions reduction -decrease in the emissions from the broiler storage pile represented 41.16% and from the pig storage pile 35.85%, both in comparison with reference storage piles. and with a possible use of a biotechnological agent to reduce ammonia emissions. The application of biotechnological agents is one of the verified ammonia abatement technologies that could be used in the housing systems. These agents, when properly used, provably and significantly reduce ammonia emissions by certain percentage in comparison with reference technologies commonly used in the housing systems (JELÍNEK et al. 2004). The goal of this survey was to verify the reducing effect of the biotechnological agents on the ammonia emissions from pig and broiler farmyard manure storage piles. Keywords MATERIAL AND METHODS Ammonia emissions and airflow rate measurementAmmonia concentrations were determined with the Innova system (Photoacoustic Multi Gas Infrared Analyzer). The system provided a real-time analysis and measured and displayed NH 3 concentrations. Measured data were related to standard conditions for temperature (0ºC) and pressure (101.325 kPa). A special designed chamber was used to carry out the experiment. The chamber, with height of 27 cm, length of 60 cm and width of 40 cm, was laid on the storage pile with its opened section being in contact with the surface of the pile. The chamber, on its shorter side, is equipped with a set of suck-openings, each with a 5 mm diameter. On the opposite side of the chamber a fan with a 25 cm long duct (75 mm perimeter) is attached in order to enable constant flow rate from the chamber. Revolutions of the fan were adjusted to obtain a constant flow rate of 0.1 m/s. The air at the inlet of the chamber was taken up by the probe No. 1, the air from the outlet, behind the fan, was taken up by the probe No. 2. The difference in concentrations, measured by the two probes, gives a concentration of ammonia emissions from the storage pile.Other parameters -temperature and air moisture content were also measured by the Commeter model D3121. This device enables the logging within a 10 minutes' interval. System Innova logged data ca. every 6 minutes. Measuring instruments specification Method of measured results evaluation and calculation relationDetermination of the ammonia emission rate from 1 m 2 of the storage pile by calculation of the set value of the airflow rate according to the relation (1):wher...