Sewage dewatering process and equipment

  • US 6,051,137 A
  • Filed: 05/19/1998
  • Issued: 04/18/2000
  • Est. Priority Date: 04/10/1995
  • Status: Expired due to Term
First Claim
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1. A sand dry cell, filter or bed for dewatering sewage composed of water and particulate solids, comprising a non-porous container having at least one exit for liquid and having side walls and a bottom floor, a porous layer composed of a particulate material located in said container, a grid having open passageways which are larger than individual particles of said particulate material and being positioned horizontally in said porous layer above and so as not to contact said bottom floor of said container, and with some of said particulate material overlying said grid, and a layer of sand or "P" gravel located on top of said porous layer, individual particles of said particulate material being larger than sand or "P" gravel.

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