Banca de DEFESA: CAIO VIEIRA VASCONCELOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CAIO VIEIRA VASCONCELOS
DATA : 28/03/2019
HORA: 08:00
LOCAL: Embrapa Agrobiologia
TÍTULO:

Characterization and treatment of the municipal waste compost of Belo Horizonte-MG aiming at the use in Urban Agriculture actions

PALAVRAS-CHAVES:

Composting, thermotolerant coliforms, solarization, root substrate

PÁGINAS: 80
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Ciência do Solo
ESPECIALIDADE: Fertilidade do Solo e Adubação
RESUMO:

Composting is one of the main alternatives for the treatment of organic urban solid waste, making possible the transformation of unstable materials and with microbiological contaminations, in organic fertilizer, soil conditioner or substrate. This research was carried out under the public composting program developed by the Superintendência de Limpeza Urbana (SLU) da Prefeitura de Belo Horizonte (PBH) in order to attend PBH's school and community gardens (Programa Hortas Escolares e Comunitárias/PBH). The objective of this research was to characterize the composting process over a period of 123 days and the compost obtained, identifying the origin and dynamics of possible microbiological contaminations, especially with thermotolerant coliforms, as well as to develop treatment and utilization alternatives, aiming to adapt the SLU / PBH compost for use in Urban Agriculture actions. It was verified that the composting process presented thermophilic values during almost all the evaluated period. The obtained compost presented high pH, moderate electrical conductivity and good nutrient content. It was verified that the raw materials used in the composting presented high contamination by thermotolerant coliforms, being this the probable origin of the residual contamination at the end of the composting process. However, there was also evidence of cross contamination by the joint use of machines / equipment and the composting yard itself. No other microbiological or heavy metal contamination has been identified. The post-composting treatments to reduce / eliminate residual contamination by thermotolerant coliforms presented different efficiencies, and solarization with translucent plastic was highly efficient, making the compost suitable for agricultural use in only a few days. It was also evaluated the use of the substrate compound to produce lettuce seedlings, mixed with different proportions of vermiculite and in the presence or absence of cover fertilization with cottonseed meal. It was observed that the substrates with predominance of compost had lower germination. It was also observed that the addition of vermiculite in larger proportions was favorable to the development of the seedlings, and it was possible to obtain seedlings superior to those obtained with the use of commercial substrate. The use of cover fertilization was essential to obtain quality seedlings.

MEMBROS DA BANCA:
Presidente - 991.790.757-20 - MARCO ANTONIO DE ALMEIDA LEAL - EMBRAPA
Externo ao Programa - 1815763 - IRENE DA SILVA COELHO
Externo à Instituição - SILVIO DA SILVA SANTOS