Name: ALADIM FERNANDO CERQUEIRA
Publication date: 22/02/2022
Advisor:
Name |
Role |
|---|---|
| LUCIANA HARUE YAMANE | Advisor * |
| RENATO RIBEIRO SIMAN | Co-advisor * |
Examining board:
| Name |
Role |
|---|---|
| LUCIANA HARUE YAMANE | Advisor * |
| RENATO RIBEIRO SIMAN | Co advisor * |
| ROSANE HEIN DE CAMPOS | Internal Examiner * |
Summary: Poultry waste has little explored potential for energy use and its management in composting
generates significant impacts in terms of greenhouse gas (GHG) emissions, ammonia (NH3)
and N losses. This study mapped and classified the poultry production systems in Espírito Santo
State, Brazil, calculated bird population, manure generation, methane potential in mono- and
co-digestion with available co-substrates in the study area, environmental impacts on
management. Finally, 2 scenarios (conservative and optimized) were simulated with anaerobic
digestion to avoid losses and emissions. In area of study, 2085 production units were mapped,
occupying 2242 million m² of area, with 5 production systems, layer hens manure-belt houses
(SPaut), layer hens automatic high-house (SPca), layer hens cage house (SPcm), nonacclimatized broiler litter house (SCpn) and acclimatized broiler litter house (SCpp). The
population of birds was estimated at 38455 million heads that generate 812684 ton.year-¹ of
waste, with a CH4 potential in monodigestion of 76410 thousand m³.year-¹ and a capacity to
generate 35.55 MWe. The waste generated from layer manure belt, dry chicken manure and
broiler litter, has an emission of 326,104 and 9,862 ton.year-¹ of CO2e of GHG and NH3 and a
loss of 25,798 ton.year-¹ of N. The conservative scenario will allow the exploitation energy
with the potential to generate 27.23 MW of electricity and the avoidance of 31.8%, 37.2 and
36.4% of GHG emissions, N losses and NH3 emissions, respectively. The optimized scenario
will allow the energy use of waste in 226 plants with a total electrical potential of 86.4 MW and
avoid GHG and NH3 emissions and N losses by 73.4%, 71.7% and 86.9%, respectively. The
unavailability of co-substrates proved to be a limiting factor for the development of alternative
scenarios for most co-substrates. The concentration of layer manure belt in SPaut systems is an
important factor in GHG and NH3 emissions and N losses in the management of poultry manure,
but it is an opportunity to increase environmental efficiency through anaerobic digestion.
