A combination of microfiltration and high pressure treatment for the elimination of bacteria in bovine colostrum

Cross-Flow Microfiltration of Glycerol Fermentation Broths with Citrobacter freundii

“…In turn, number of bacteria in the feed was in the range between 3.55 × 10 7 and 5.48 × 10 9 CFU/mL. The same order of magnitude of CFU/mL in various bacterial suspensions clarified by cross-flow MF systems with ceramic membranes has been reported in previous studies [5,7,11,16,19,20,23] (Table A1). In the fermentation broths, a sediment has been observed and the total wet biomass has been determined in the range 5.06 and 10.08 g/dm 3 .…”

“…Table A1, Appendix A summaries literature review related to the cross-flow MF of bacterial suspensions by using ceramic membranes. It indicates that microfiltration process is becoming increasingly attractive in the biotechnology industry in order to obtain a clarified filtrate from various bacterial products such as skim milk [1][2][3][4][5][6], skimmed colostrum [7], gum arabic suspension [8], cell suspension [9][10][11][12], fermentation soy sauce [13,14], and fermentation broths [15][16][17][18][19][20][21][22][23][24][25]. It has to be pointed out that with regard to complex media such as fermentation broths, microfiltration is proposed as a pre-treatment stage for the final separation by nanofiltration (NF) or reverse osmosis (RO) processes with spiral-wound modules [26].…”

Effect of non-thermal processing techniques on pathogenic and spoilage microorganisms of milk and milk products

“…They were unable to detect any bacteria in permeate from skim milk having an initial count of 5.25 and 2.15-log CFU/mL of vegetative bacteria and spores, respectively following the application of MF treatment (pore size of 1.4 μm at 6 °C) and somatic cell count was reduced to 3.0-log. (Gosch et al, 2014) used 0.8 and 1.4 μm MF (tubular ceramic ISOFLUX  membrane) to process colostrum and skim milk. The microbial removal with a 0.8 μm MF membrane was more efficient than >5.4-log reduction in total viable count, while >3.5 log reduction in the count using a membrane having pore size of 1.4 μm.…”

“…The skim milk processed through 1.4 μm MF at 51 °C, reduced the bacterial count to 4.13-log cycles while the spore count was found <1.0-log. (Daufin et al, 2001) reported a microbial reduction of 2.1 to 3.1-log CFU/mL when milk was passed through 1.4 μm MF, depending on initial count and morphology of the bacteria, while (Gésan-Guiziou, 2010) counted a 2-3-log Gosch et al (2014) reached to 100 °C, the thermosonication effect was dramatically diminished. For the maximum spore's inactivation, the optimum temperature was 70 °C under the experimental conditions.…”

Uso de microfiltração para melhoria da qualidade e extensão da vida de prateleira de leite pasteurizado

“…Para reduzir os microrganismos de produtos termicamente sensíveis como o colostro, que é fonte de vários produtos nutracêuticos, têm sido utilizados a microfiltração juntamente com sistemas de alta pressão (GOSCH et al, 2014). O processo de microfiltração também é eficiente na remoção de esporos.…”