Filtration membrane fouling in ultrafiltration of skim milk. II Scanning electron microscopy and chemical analyses of fouling.

Koutake, Masanobu; Uchida, Yukio; Sato, Takayoshi; Shimoda, Kousou; Kimura, Toshiaki; Sagara, Yasushige; Watanabe, Atsuo; Nakao, Shin-ichi

doi:10.1271/nogeikagaku1924.61.683

Journal of the agricultural chemical society of Japan

1987

DOI: 10.1271/nogeikagaku1924.61.683

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Filtration membrane fouling in ultrafiltration of skim milk. II Scanning electron microscopy and chemical analyses of fouling.

Masanobu Koutake¹,

Yukio Uchida²,

Takayoshi Sato³

et al.

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Cited by 3 publications

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“…3 5) Several papers6 8) have suggested that fouling in the pores of membranes can occur, as well. We 9 ) applied hand cleaning with a soft sponge to the surface of a fouled membrane after UF of skim milk to concentration factor 6, and found that fouling in pores contributed to permeate resistance. Nabetani et al 10 ) hand-cleaned the surface of membranes to which ovalbumin solution had absorbed and fount that fouling by adsorption is not only on the surface but also in the pores of the membranes.…”

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confidence: 99%

Classification of Resistance to Permeation Caused by Fouling during Ultrafiltration of Whey and Skim Milk

Koutake

Matsuno

Nabetani

et al. 1992

Bioscience, Biotechnology, and Biochemistry

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mentioning

confidence: 99%

Classification of Resistance to Permeation Caused by Fouling during Ultrafiltration of Whey and Skim Milk

Koutake

Matsuno

Nabetani

et al. 1992

Bioscience, Biotechnology, and Biochemistry

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Osmotic pressure model of membrane fouling applied to the ultrafiltration of whey

Koutake

Matsuno

Nabetani

et al. 1993

Journal of Food Engineering

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Effective Cleaning and Sanitizing of Polysulfone Ultrafiltration Membrane Systems

Bohner

Bradley

1992

Journal of Dairy Science

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Polysulfone UF membranes that were soiled by Cheddar cheese whey were successfully cleaned in place. This cleaning procedure was completed in about 1 h. Most cleaning chemicals used were common and inexpensive. The cleaning procedure consisted of rinsing the membrane system for 2 min with water initially and after each cleaning solution. Sodium hydroxide at pH 11.0, with .1% of a nonionic surfactant added, was circulated for 20 min. After a 2-min rinse with water, a 1:1 mixture of nitric and phosphoric acids at pH 2 was circulated for 20 min and rinsed again with water. Finally, sodium hydroxide at pH 11.0, with 200 ppm of sodium hypochlorite added, was circulated for 20 min and rinsed. All cleaning solutions and all rinse waters were at 54 degrees C. Membranes cleaned by this procedure were found to be free from whey residue under examination by scanning electron microscopy. The cleaning process did not damage the membranes even when it was used continuously for 300 h. Microbial populations on the membrane were estimated by incubating small (4-cm2) sections of membrane in screw-cap vials filled with trypticase soy broth. From the portion of vials showing growth after 72 h at 32 degrees C, a most probable microbial population was calculated. Santizing cleaned polysulfone UF membranes with 100 ppm of sodium hypochlorite or 100 ppm of dichloroisocyanurate at 54 degrees C resulted in membranes free from viable microorganisms. When dichloroisocyanurate was used at 10 degrees C and 200 ppm, a most probable microbial population of 290/m2 was found. No microbial growth was detected when cleaned and sanitized membranes were stored in tap water for 24 h. This technique for cleaning UF membranes does not require the use of a holding solution containing santizers to control the growth of residual microorganisms.

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Filtration membrane fouling in ultrafiltration of skim milk. II Scanning electron microscopy and chemical analyses of fouling.

Cited by 3 publications

References 0 publications

Classification of Resistance to Permeation Caused by Fouling during Ultrafiltration of Whey and Skim Milk

Classification of Resistance to Permeation Caused by Fouling during Ultrafiltration of Whey and Skim Milk

Osmotic pressure model of membrane fouling applied to the ultrafiltration of whey

Effective Cleaning and Sanitizing of Polysulfone Ultrafiltration Membrane Systems

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