| http://www.w3.org/ns/prov#value | - In general, the removal efficiencies of both types were comparable but the system with a vertical flow over horizontal flow sand bed is more suitable for sites with limited land area, although its construction can be more difficult than the system with horizontal flow followed by a vertical flow bed.Item Type:ArticleResearch Areas:A. > School of Science and Technology > Natural SciencesCitations o
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