2016 Fiscal Year Final Research Report
Development of Enhanced Filtration Process Packed with Super Fine Silica Sand
| Project/Area Number |
26340106
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Design and evaluation of sustainable and environmental conscious system
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 砂ろ過 / 凝集 / 逆洗 / 微細珪砂 |
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| Outline of Final Research Achievements |
A novel sand filtration process packed with super fine silica sand was developed for applying to small-scale distributed water infrastructure.
Evaluation results of the fundamental filter performance indicated that (1) removal efficiencies of particle matters obtained by this filter with the depth of 10cm were comparable with those obtained by the conventional rapid sand filter, (2) even if influent turbidities increased rapidly, those in the effluent from this filter were stable.
In addition, the filter backwash method with mechanical paddle mixing was proposed. Evaluation results on conditions and effects indicated that (3) effects of deposit removal from the filter and homogenization of particles in suspension were dependent on G value for mixing of water on the filter, (4) although amounts of backwash water required for this filter were about 1/4 for the conventional rapid sand filter, over 95% deposits could be removed by optimizing the backwash conditions.
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| Free Research Field |
水環境工学
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