Effects of Sodium Bicarbonate on milk preservation

Authors

  • Mohammad Mizanur Rahman Department of Dairy Science, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh-2202
  • Md Nurul Islam Department of Dairy Science, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh-2202
  • Md Harun ur Rashid Department of Dairy Science, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh-2202
  • AKM Masum Department of Dairy Science, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh-2202

DOI:

https://doi.org/10.3329/ralf.v5i1.36555

Keywords:

Milk preservation, Sodium bicarbonate, Physical properties, Chemical properties

Abstract

The present investigation was carried out to assess the effect of sodium bicarbonate (NaHCO3) on the keeping quality of raw cow milk. Milk samples were collected from Bangladesh Agricultural University (BAU) Dairy Farm and initial quality were evaluated using physical and chemical tests at Dairy Technology Laboratory of the Department of Dairy Science, BAU. Then, collected samples were preserved at room temperature (28- 30°C) with 0.0 (control), 0.3, 0.4 and 0.5 per cent NaCHO3. The quality of milk samples were measured at every two hours interval up to 6 hours, one hour interval upto 16 hours and thereafter every half an hour interval until spoilage. Initially, colour, flavour and texture of all milk samples were normal (100%), but with progressive storage time colour, flavour and texture of all samples deteriorated gradually, which was more rapid for control samples than that of the NaHCO3 treated samples. Acidity per cent of all samples increased gradually during storage period and the differences in acidity of milk samples in different treatments were significant (p<0.01). Control samples spoiled after 11¼th hours but that of 0.3, 0.4 and 0.5 percent NaHCO3 treated samples spoiled after 16¾th, 17¾th and 18¾th hours,, respectively. It may be concluded that NaHCO3 is the effective chemical neutralizing the acids produced by acid producing bacteria and can be used as a short term preservation of milk under rural condition of Bangladesh where scientific cooling or pasteurization facilities are not available.

Res. Agric., Livest. Fish.5(1): 75-85, April 2018

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Published

2018-05-03

How to Cite

Rahman, M. M., Islam, M. N., Rashid, M. H. ur, & Masum, A. (2018). Effects of Sodium Bicarbonate on milk preservation. Research in Agriculture Livestock and Fisheries, 5(1), 75–85. https://doi.org/10.3329/ralf.v5i1.36555

Issue

Section

Livestock