Banca de DEFESA: LUIZ FERNANDO CANAZARO TRINDADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUIZ FERNANDO CANAZARO TRINDADE
DATE: 19/12/2019
TIME: 09:00
LOCAL: Sala da Pós Graduação - EAJ/UFRN
TITLE:

QUALITY OF REFRIGERATED RAW MILK AND USE OF BULK TANKS IN THE EAST, AGREST AND CENTRAL RIO GRANDE DO NORTE MESOREGIONS

KEY WORDS:

bulk, dairy farm, milk, tank 

PAGES: 30
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

Raw milk cooling in bulk tanks is a practice aimed at ensuring the quality of milk obtained from farms until they reach the industry. This study aimed to evaluate the quality of raw milk and the use of individual and collective cooling tanks in Rio Grande do Norte. The study was conducted in the Agreste, Central and Coastal mesoregions of the state of Rio Grande do Norte. Thirty-five individual and nine collective tanks participated in the study. The nominal capacity was obtained through the information indicated on the tank and the used capacity of the tank by measuring the level of milk stored in centimeters with the aid of a ruler. The percentage utilization of the tank capacity was obtained by the ratio between the used capacity and the nominal capacity. 155 raw milk samples were obtained directly from the cooling tank and kept refrigerated until the moment of analysis. The samples were submitted to physicochemical analysis to determine the fat, protein, lactose, degreased dry extract and total solids contents by infrared absorption spectrometry. Somatic Cell Count (SCC) of the samples was also performed by the flow cytometry method. Data were distributed according to the type of tank use (individual or collective) and in mesoregions (Agreste, Central and Coastal), to obtain descriptive statistical analysis and comparison of means. The individual tanks presented 33.0% in the average use, while the collective ones used 30.7%. The Central, Agreste and Coastal mesoregion tanks are used at 55.7, 29.6 and 60.0% of their capacity, respectively, indicating that the regions still have potential to embrace increased milk production. 40.0, 0.6, 4.8 and 51.5% of the samples were in non-compliance with current legislation, in the parameters Fat, Protein, Degreased Dry Extract and CCS, respectively. The overall mean SCC was 494.48 x 10³cels/ml, which indicates the compromised health of the mammary gland in dairy herds, which can lead to quantitative and qualitative loss of milk. There was a significant difference between the mesoregions in the mean milk fat, protein and lactose. It was concluded that the quality of refrigerated raw milk and the utilization of tanks in the Agreste, Central and Coastal mesoregions of Rio Grande do Norte are below the recommended. The existence of refrigeration tanks in bulk milk transport routes provides logistic efficiency in the sector, especially in terms of agility in collection and processing and in the preservation of product quality. Thus, these results can support actions by government agencies in order to make better use of bulk capacity in Agreste, Central and Litoral, without the need for new investments for the acquisition of refrigeration equipment.

BANKING MEMBERS:
Presidente - 2313454 - ADRIANO HENRIQUE DO NASCIMENTO RANGEL
Externa à Instituição - DANIELLE CAVALCANTI SALES
Externo à Instituição - JOSE GERALDO BEZERRA GALVÃO JUNIOR - IFRN