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KMID : 0380020040190020104
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Korean Journal of Biotechnology and Bioengineering
2004 Volume.19 No. 2 p.104 ~ p.109
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Comparison of Bacterial Regrowth on Plant- and Coal-based Granular Activated Carbon
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Lee Dong-Geun
Park Sung-Joo
Ha Bae-Jin
Ha Jong-Myuong
Lee Sang-Hyun
Lee Jae-Hwa
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Abstract
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Activated carbon has been used in water treatment, because they strongly adsorb organic material including contaminant. Water purifier usually use activated carbon, and bacterial regrowth on that could induce many problems. Model columns, packed with coal- and plant-based granular activated carbon (GAC), were operated with rechlorinated tap water to compare the degree of bacterial regrowth on different GACs. GAC columns decreased the concentration of total organic carbon and chlorine, while they are not good for the decrease of ions. Breakthrough of bacteria were occurred after eight days of operation, and reached 1.1 10 CFU/mL on coal based GAC and 6.2 10 CFU/mL on coconut based one. Bacterial activities on GAC were between 15.35 ∼ 29.06 INT-formazan/g-GAC/h. Bacterial concentration and activities were higher in coal based GAC than coconut based one. Bacterial regrowth on GAC was clarified and regrowth effect of coal-based GAC was higher than that of coconut-based one.
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KEYWORD
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GAC, granular activated carbon, bacterial regrowth, coal, plant, INT
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