Banca de DEFESA: Ana Gabriela Carvalho Rodrigues do Nascimento

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Ana Gabriela Carvalho Rodrigues do Nascimento
DATE: 06/12/2023
TIME: 09:00
LOCAL: HVET GRANDES, GRANJA DO TORTO
TITLE:

BIOTECHNOLOGY APPLIED FOR SUSTAINABLE USE OF WASTE IN EQUINE INDUSTRY

KEY WORDS:

Horse, environment, solid waste, 

PAGES: 90
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Clínica e Cirurgia Animal
SPECIALTY: Clínica Veterinária
SUMMARY:

Brazil's horse population ranks third in the world, with 5.9 million animals, including animals for work, competition, therapy, entertainment and those with high zootechnical value. The horse production cycle is relatively long and intensive breeding systems prevail. Therefore, one of the main challenges in this segment arises from problems arising from stable horses, such as causing behavioral disorders, physiological disorders and environmental damage, leading to a reduction in horse health. Places such as stables, cavalry regiments and equestrian stables, often located in large urban centers, generate large amounts of waste, mainly from bedding used to promote better animal welfare conditions. When inappropriately disposed of in the environment, this waste causes problems such as contamination of groundwater and receiving bodies, attraction of urban pests and degradation of environmental aesthetics. The sustainable production of these animals drives the search for new technologies and research in this universe, with one of the biggest challenges for researchers being the fate of this type of waste, which has become an issue related to both ecological, health and economic aspects. There are several ways to treat this waste before being released into the environment, such as physical, chemical and biochemical processes. Composting is one of the main forms of biochemical treatment, which aims to convert organic matter that cannot be incorporated into the soil into usable biological fertilizer. Several efforts have been made in relation to applied research for composting waste in various industrial sectors, but little research has been done to investigate the feasibility of disposing of horse waste. Composting saturated horse bedding is a time-consuming process and can generate low-quality compost due to the nature of the recalcitrant material that makes up the bedding, requiring several cycles for its decomposition. The present work aimed to isolate and identify fungi present in compost piles of saturated horse bedding made with wood shavings or rice straw, aiming to select fungal isolates with greater potential for cellulolytic activity, seeking to optimize the process of degradation of organic matter in order to have a reduction in the time and cost of compost production. The isolates with the highest cellulolytic activity were identified as belonging to the Aspergillus fumigatus species. It was observed that in compost piles using wood shavings there was a reduction in total organic carbon values and in the C/N ratio, more markedly in the treatment inoculated with A. fumigatus in relation to the control treatment, as well as reductions in the levels of cellulose and hemicellulose. The total nitrogen, total organic carbon, C/N ratio and ligninocellulose degradation did not differ significantly in the piles using rice straw as substrate. The inoculation of A. fumigatus in beds saturated with wood shavings improved the final characteristics of the compost, being an alternative to improving the efficiency of the composting process for this type of waste. However, the same effect was not observed for beds saturated with the use of rice straw, where serial inoculation of A. fumigatus was not effective in optimizing the composting process.

COMMITTEE MEMBERS:
Presidente - 3356525 - ANTONIO RAPHAEL TEIXEIRA NETO
Interno - 306996 - JOSE RENATO JUNQUEIRA BORGES
Externa ao Programa - 1771512 - ALESSANDRA MONTEIRO DE PAULA - UnBExterno à Instituição - DANILO SIMONINI TEIXEIRA - UESC-BA
Externo à Instituição - IVERALDO DOS SANTOS DUTRA - UNESP