• 대한환경공학회지
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• 제22권6호
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• pp.1001-1009
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• 2000

본 연구는 온도와 pH변화에 따른 처리특성을 S-COD, T-COD, SS, 처리율의 경시변화, 슬러지전환율, SVI 및 유출수 pH의 변화 등을 중심으로 연속포기식과 간헐포기식의 활성슬러지법의 처리특성을 비교하였다. 실험결과 온도보청계수($\theta$)는 연속포기시 1.0~1.061, 간헐포기시는 1.0~1.086으로 나타나 극미하기는 하나 간헐포기시가 온도에 민감한 것으로 나타났으며, 슬러지전환율은 간헐포기시가 연속포기시에 비해 적은 것으로 나타나 보다 경제적이었다. 한편 pH를 변화시킬 경우 양 반응기 모두 산 쪽에서 미미한 악화를 보이나 알칼리 쪽에서는 개선됨을 보여주었고, 전체적으로 처리수의 수질과 유출수의 pH 변화폭 등을 고려할 때 연속포기시에 비해 간헐포기시가 양호하였다.

• 한국환경보건학회지
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• 제18권2호
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• pp.82-91
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• 1992

The examination of the pollutants originated from domestic sewage, industrial and agricutural activities the existences of some toxic heavy metals, organic matters and pathogenic microorganisms. A recent report of WHO brought out that such pollutants are in existence with above roughly 2,000 kinds of chemical substances and amongst them about 750 chemicals have been indentified by drinking water. And above 600 kinds of them are organic pollutants and in addition these include carcinogenic mutagenic and poisonous substances. This is not intended to embody a study of broad confined to various approaches on organic materials, and therefore will be THM produced on injection of chlorine at water filtration plant. To specify the relations between THM and factors having an effect upon THM such as TOC, Cl$_{2}$, Temperature, pH and reaction time, first of all the recovery ratio for analytical methods of THM (Head sapce, purge and trap, Liquid/ Liquid Extraction methods) was investigated. Provided that by using it,the correction coefficients are obtained, the accuracy of data might be able to be enhanced through analysis.The result of the experiments are given in the followings. 1) Among three kinds of analytical methods, recovery rate was higher in order of purge and trap Liquid/Liquid Extraction, Head space. There is no great difference in recovery rate among three methods. 2) The higher the concentration of TOC, the more the amount of THM. 3) The higher the reaction temperature, the more the amount of THM. 4) The longer the reaction time, the more the amount of THM. 5) The higher the pH, the more the amount of THM. 6) The higher the concectration of chlorine, the more the amount of THM.