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Effects of Filtration on the Characteristics of Reused Waste Brine in Kimchi Manufacturing  

Yoon, Hye-Hyun (Department of Culinary Science and Arts, Kyung Hee University)
Kim, Dong-Man (Korea Food Research Institute)
Publication Information
Korean Journal of Food Science and Technology / v.34, no.3, 2002 , pp. 444-448 More about this Journal
Abstract
The waste brine gained from successively reused brine during kimchi manufacturing can cause serious water pollution. We investigated the filtration effects on the physicochemical characteristics and microbial counts of the waste brine. Chinese cabbage was salted for five times successively, and the waste brines were filtered through sand and active carbon column. While original values of salinity and soluble solid contents of waste brine were 15.4% and $18.0^{\circ}$Brix$, respectively, we observed decrease of them to 0.1% and $0.0^{\circ}$Brix$, respectively, after filtration of the waste brine through sand followed by active carbon column. The filtration also recover pH value of the waste brine to its original value, which was decreased by successive salting from 8.3 to 6.0. We also observed that COD of waste brine increased to 63.2 ppm after five times of salting but decreased to 5.1 ppm after active carbon filtration. Total viable count was also increased with successive 5 steps of salting and was not detected after active carbon-filtration.
Keywords
kimchi; salting; waste brine; filtration; active carbon;
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