Banca de DEFESA: RENATA DOS SANTOS ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RENATA DOS SANTOS ALVES
DATE: 20/08/2024
TIME: 08:30
LOCAL: Defesa remota por meio de videoconferência
TITLE:

Chemical, physical and biological evaluations of dehydrated chicken manure aiming its use in organic agriculture.

KEY WORDS:

Laying hen manure; organic fertilizer, dehydration, carbonization.

PAGES: 50
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Fertilidade do Solo e Adubação
SUMMARY:

The production and consumption of eggs in Brazil is increasing, as is the generation of laying hen manure, which could be used to meet part of the growing demand for fertilizers by organic agriculture. However, manure produced in conventional systems can only be used in organic systems after composting. In addition, laying hen manure is an unstable product, with a pasty texture and high humidity, which makes its transport, storage and application difficult. A processing alternative that is spreading is its dehydration in rotating drums being subjected to temperatures ranging from 150 to 350 oC. The end product is a stable, granulated, nutrient-rich fertilizer free from biological contamination. Another feature is the immobilization of part of the nitrogen (N) in biostable heterocyclic aromatic N structures, which promotes the gradual availability of this nutrient. Thus, this dehydration process presents itself as an alternative to composting in order to make laying hen manure suitable for use in organic production. And for that, it is necessary to know better the transformations that occur during the drying process at high temperature and the characteristics of the fertilizer obtained, but there are few works in this direction. The objective of this dissertation is to carry out evaluations of several characteristics of dehydrated chicken manure in order to gather elements that can support the recommendation for its use in organic agriculture. The dehydrated manure produced in Santa Maria de Jetibá/ES, the largest egg producing municipality in Brazil, will be used, evaluating chemical characteristics such as total and available nutrient contents, pH, EC, stability, humic substances, contamination with heavy metals and characterization. of organic groups; Physical characteristics such as: density, granulometry and others; And biological characteristics such as: presence of salmonella + coliforms + helminths and the presence of antibiotic resistance genes. Vessel experiments will also be carried out to evaluate the short-term and medium-term N supply capacity.

COMMITTEE MEMBERS:
Presidente - ***.790.757-** - MARCO ANTONIO DE ALMEIDA LEAL - EMBRAPA
Interno - ***.960.133-** - EDNALDO DA SILVA ARAÚJO - EMBRAPA
Externo à Instituição - CAIO DE TEVES INÁCIO - EMBRAPA