Avaliação físico-química e microbiológica de leite cru recebido em tanques comunitários

• Autor(a) principal: Cavalcanti., Valéria Rocha
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/4022
• topic: Qualidade; Leite in natura; IN 51; Condições higiênico - sanitárias; Quality; Fresh milk; Normative instruction 51; Hygienic and sanitary; CIENCIA E TECNOLOGIA DE ALIMENTOS::TECNOLOGIA DE ALIMENTOS

In this work, the goal was to evaluate the physic-chemical and microbiological quality of uncooked milk stored in common tanks of three municipalities in the state of Paraiba, and verify the sanitary conditions of manufacturing establishments and their tanks, checking if they have been met in the requirements of Brazilian laws. The evaluation of community tanks and easy access properties were based on the application of checklists, containing 38 -57questions, respectively. Afterward, milk samples were submitted to be stored during the reception in the tanks, the determination of temperature and testing alizarol and acidity. Also, milk samples were collected from properties that participated in the checklist to perform the analysis of fat, protein, lactose and non fat solids. Based on the checklist, the tanks were classified as Grade I and Grade II and the properties in the grade II, requiring improvements to suit the necessities, except the property P1of the tank II, classified as Grade I. The most of the samples were received with temperatures above 30 °C and was observed by means of the acidity, the high proportion of sour milk in a tank, and alkaline milk in the tanks 2 and 3. In alizarol test, the results showed an alkaline reaction (purple) in the tank I, in the tanks 2 and 3, the samples were inside the standard, with a predominance of red brick, as milk with normal responses. About the nutrients like fat, protein and lactose were all appropriate. The ESD 29,6% of the 27 samples was low of the minimum required. The CPP ranged from 1,2 x106 to 1,1x107 UFC/ml, all samples were above the standard allowed 7,5x105. The NMP of some samples had values above 10³ MPN / mL. The CCS ranged to1,0x103 to 8,5x103 CS/mL, all samples were within the standard. The result of the calculation of S.aureus ranged from 2,5 x10³ to 2,5x10³ UFC/ mL. The results showed that, in general, the raw milk samples were within the parameters recommended by the legislation; however, are necessary improvements in hygiene and sanitary treatment of animals before, during and after milking so will happen a reduction in the CPP.