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Ohgi Kyo

Affiliate Master Yamaguchi University

DO improvement performance evaluation for water purification technology

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 60 Issue 1 Page 19-25
published_at 2009-10
A040060000104.pdf
[fulltext] 624 KB
Title
水質浄化技術におけるDO改善性能評価方法について
DO improvement performance evaluation for water purification technology
Creators Hadano Kesayoshi
Creators Ohgi Kyo
Creators Ma Jun
Creators Asai Koji
Creators Nakano Yoishi
Creators Fujisato Tetsuhiko
Source Identifiers
Creator Keywords
water quality DO improvement bubble cluster energy saving equivalent DO increment
In order to improve the DO condition of a lake or sea, authors are developing the liquid film gas dissolution technique. This paper presents a summary of this technique, experimental results of DO improvement, and performance evaluation method for the DO improvement considering the DO concentration of the water to be treated. This DO improvement method transforms the water into bubble clusters which essentially makes water elements of the thin film of bubbles. This method yields a large value of the dissolved gas concentration gradient in the water and therefore attains an efficient gas dissolution. Also, this method treats deep water utilizing the airlift effect by aeration in the shallow part of the pipe, thus saving energy. The authors have shown experimentally that the DO increment depends on the DO concentration of the water to be treated, and proposed the equivalent DO increment as an index of the DO increment which can be used irrespective of the DO concentration to be treated and which indicates the potential of the DO increment for the same working condition from the theory of the aeration device. The validity of this index was checked using the result of the present experiments.
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 2009-10
File Version Version of Record
Access Rights open access
Schools 大学院理工学研究科(工学)