ダウンロード数 : ?
言語
英語
著者
Wakatsuki , Toshiyuki
Iwashima, Noriko
内容記述(抄録等)
Multi-soil-layering (MSL) wastewater treatment systems consist of soil units (soil mixture blocks, SMB) arranged in a brick-like pattern surrounded by permeable layers of zeolite or alternating particles of homogeneous sizes that allow for a high hydraulic loading rate. This study evaluated the performances of MSL systems that have been operating for 17 to 20 years in small rural communities. Even though 20 years had passed since this system was installed, high organic matter treatment performance continued. Nitrogen removal was higher than with conventional soil systems. Two of the MSL systems continued to show high phosphorus removal performances, whereas in the third system, the adsorbing capacity was relatively low, requiring further investigation. Treatment performances were largely dependent upon the structure of the MSL systems. It appeared that improving the structure to enhance the contact efficiency between the wastewater and the soil in SMB was important for enhancing treatment performances. The combined use of existing wastewater treatment systems with the MSL system was effective for preventing environmental pollution over a long period.
掲載誌名
Applied and Environmental Soil Science
2019
発行日
2019-1-23
DOI
出版者
Hindawi
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e35744
e35544
部局
生物資源科学部
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