Temperature and microbiological parameters of poultry manure under different fermentation modes

Abstract

To meet food needs both in Ukraine and globally, the production of affordable and relatively cheap poultry meat will increase. At the same time, the problem of increasing poultry waste accumulation, including manure with and without bedding, is becoming more acute. Large volumes of broiler manure in limited areas due to different storage conditions have a negative impact on the environment. The study of the conditions and modes of composting broiler manure as an effective way of its utilisation is of scientific and economic importance. The aim of the study is to determine the temperature and microbiological parameters of broiler manure composting using different modes of its aeration. To achieve this goal, fresh broiler manure was composted in the conditions of the scientific and educational research centre of the Bila Tserkva National Agrarian University using a mixture of biodestructors and different aeration regimes. In the control group, the piles were formed on a concrete platform without the use of a tubular frame of the barbital type, and aeration was carried out by mechanical mixing of broiler manure once every 10 days. In the experimental groups, piles of broiler manure were formed on tubular frames through which air was injected by a compressor. In the first experimental group, air injection was carried out for 15 minutes in the first half of the day. In the second experimental group, air was injected into the broiler manure twice for 15 minutes in the morning and in the evening. It was experimentally established that the composting temperature of broiler manure depended on the intensity of aeration of the latter. With daily aeration twice a day, the temperature of the manure biomass (6th day of composting) was the highest and exceeded the control values by 87.8 %. In experimental groups I and II, with one and two daily enrichment of broiler manure, the period of fermentation in the thermophilic mode was the same. Comparing the groups where poultry manure was enriched once and twice a day, it was found that double aeration did not lead to a statistically significant increase in the temperature of composted biomass. It was proved that active air enrichment of poultry manure (experimental group II) increased the QMAFAnM index and the number of Bacillus spp. bacteria by 7.6 and 24.0%, respectively, compared to the control group. The study of a number of chemical parameters of broiler chickens' manure composted by the accelerated method under different aeration regimes is promising.