Emissiemetingen stallen voor biologisch gehouden leghennen : Onderzoek naar emissies uit twee stallen met biologische leghennen

This report describes the result of emission measurements at two poultry houses containing organic laying hens. Organic laying hens are kept differently from regular housed laying hens, which gave reason for measurements in organic laying poultry houses. Measurements are performed in two houses containing 12.000 brown laying hens each. Measurements consists of T, RH, CO2, CH4, N2O, NH3, odor and PM10. This resulted in these values: • Ammonia emission: 0,174 (± 0,075) kg/animal place per year • Methane emission: 17,6 (± 4,1) g/animal place per year • Particulate matter emission: 89 (± 55) g/animal per year • Odor emission: 0,449 OUE/animal place per second

Emissiemetingen ECO Zero stal : onderzoek naar de emissies van ammoniak en fijnstof uit de ECO Zero stal en de reductie van deze emissies door de ECO Units

In this report, results are presented of ammonia and particulate matter emission measurements on ECO Units, these are part of the ECO Zero system. Measurements were performed at a free range laying hen farm. Next to the poultry house three ECO Units were installed, these units are heat exchangers with an added cooling and air scrubbing function. The cooling system can reduce air temperatures during warm periods, which reduces the amount of needed ventilation capacity. By washing the outgoing air in the ECO Units with an acid, ammonia emission can be reduced. The way air is entering the poultry house, could have reduced the particulate matter concentration in the house. High manure belt aeriation could have led to a reduction of ammonia emission from the manure belt. The measurements show an ammonia reduction of 77% and a particulate matter reduction of 56% by the ECO Units

Ammoniakemissie van een mestbeluchtingssysteem voor vleeskuikenouderdieren met beluchtingsbuizen op de vloer van de mestput = Ammonia emission of a manure aeration system for broiler breeders with aeration pipes on the floor of the manure pit

In the Dutch decree on low-emission housing of livestock maximum emission values have been set as from 2020 for newly build barns. De maximum emission value for broiler breeders has been set at 0.250 kg per animal place per year. Housing systems that comply with this value, and comply with demands with regard to environmental impact, animal welfare, applicability, et cetera, are lacking. In this report, results are presented of ammonia emission measurements on a broiler breeder farm. In one barn of this farm, a manure aeration system was installed, consisting of aeration pipes on the floor of the manure pit onder the elevated slats, for drying of the manure. This drying was intended to reduce the microbial conversion of uric acid and undigested proteins into ammonia. An almost identical barn on the farm was used a control barn. The measurements show that the aeration system did not reduce emissions of ammonia. Suggestions are presented to make the system more effective. This study has been conducted by Wageningen Livestock Research and was commissioned by the Consortium Breeders In Balance and the Ministry of Agriculture, Nature and Food Quality