Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Treatment of Rice-Washing Wastewater by ph Adjustment

ph 조절에 의한 쌀세척 폐수의 처리

  • 노홍균 (효성여자대학교 식품가공학과) ;
  • 김지숙 (효성여자대학교 식품가공학과) ;
  • 이문이 (효성여자대학교 식품가공학과) ;
  • 조영인 (효성여자대학교 식품가공학과)
  • Published : 1994.08.01
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Abstract

Treatment of rice-washing wastewater was considered under various pH levels and chitosan concentrations. Compared with the control test, addition of chitosan at the various concentrations did not noticeably enhanced turbidity reduction at pH 4 and 5 , but greatly enhanced at above pH 6. However, reduction of turbidity in the wastewater, irrespective of chitosan concentrations, was the greatest at pH 4 and became lower by increasing pH. Suspended solids in the wastewater were the most effectively recovered by pH adjustment of the wastewater to 4 followed by centrifugation, with over 99% reduction in turbidity . Different concentrations of suspended solids in the wastewater and various kinds of acids used for p/H adjustment did not affect turbidity reduction. Increasing storage periods of the wastewater resulted in lower reductions in turbidity.

Keywords

References

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