Comparison for Removal of Coliform Group between BOD Removal Type Johkasou and Nitrogen Removal Type Johkasou
-
- TAKAHASHI NAOKI
- Miyagi Prefectural Authority for Living Environment
-
- SASAKI ATSUSHI
- Miyagi Prefectural Authority for Living Environment Graduate School of Engineering, Tohoku University
-
- SHIRAKAWA YURIE
- PACIFIC CONSULTANTS co., LTD.
-
- NOMURA MUNEHIRO
- Graduate School of Engineering, Tohoku University
-
- NISHIMURA OSAMU
- Graduate School of Engineering, Tohoku University
Bibliographic Information
- Other Title
-
- 大腸菌群除去に関するBOD除去型浄化槽と窒素除去型浄化槽の比較
- ダイチョウキングン ジョキョ ニ カンスル BOD ジョキョガタ ジョウカソウ ト チッソ ジョキョガタ ジョウカソウ ノ ヒカク
Search this article
Abstract
In this research the factors affecting on the removal of coliform group by certified structure type small-scale Johkasou were analyzed. Before chlorination process, the relevance ratios of effluent standard of the number of coliform group in BOD removal type Johkasou and Nitrogen removal type Johkasou were 70.0% and 88.3%, respectively. The number of coliform group was decreased with the decrease of BOD and SS. Furthermore, the number of coliform group was decreased with the increase of nitrification ratio. After chlorination process, the relevance ratios of effluent standard of the coliform group in BOD removal type Johkasou and Nitrogen removal type Johkasou were 85.0% and 100.0%, respectively. It was also revealed that some small-scale Johkasou, in which the residual chlorine was detected but free chlorine was not detected, could not achieve the effluent standard of coliform group. This is because that combined chlorine was generated by ammonia remained in treated water and the effect of chlorination was reduced to remove coliform group. From these results, it was concluded that certified structure type small-scale Johkasou, especially Nitrogen removal type Johkasou can removal coliform group effectively and contribute to keep hygienic safety.
Journal
-
- Japanese Journal of Water Treatment Biology
-
Japanese Journal of Water Treatment Biology 53 (1), 1-10, 2017
Japanese Society of Water Treatment Biology
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001204963098624
-
- NII Article ID
- 130006471047
-
- NII Book ID
- AN00351126
-
- ISSN
- 18810438
- 09106758
-
- NDL BIB ID
- 028088227
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed