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1. (WO2018047453) FILTRATION DEVICE

Pub. No.:    WO/2018/047453    International Application No.:    PCT/JP2017/024339
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Tue Jul 04 01:59:59 CEST 2017
IPC: B01D 24/02
Applicants: SWING CORPORATION
水ing株式会社
Inventors: SAKASHITA, Daichi
坂下 大地
YAMAKAWA, Takeshi
山川 岳志
HAGIWARA, Kazuo
萩原 一穂
ONDA, Kensuke
恩田 建介
Title: FILTRATION DEVICE
Abstract:
The present invention relates to a filtration device having a plurality of filtration layers and using clean water sources such as river water, lake water, or groundwater or using water flowing out of sedimentation ponds, condensed water not passing through sedimentation ponds, industrial water, or wastewater treated water as raw water. The filtration device is provided with a filtration layer (40) that includes an anthracite layer (43), which is formed from an anthracite, and a silica sand layer (44), which is formed from silica sand having an effective diameter smaller than the anthracite and having higher density than the anthracite. The anthracite layer (43) has the same thickness as the silica sand layer (44) or is thicker than the silica sand layer (44), and the thickness of the filtration layer (40) as a whole exceeds 600 mm and is less than or equal to 2000 mm.