Sewage dewatering equipment

  • US 5,725,766 A
  • Filed: 04/23/1996
  • Issued: 03/10/1998
  • Est. Priority Date: 04/10/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. In a sand cell, filter or bed for dewatering of sewage composed of water and particulate solids, the improvement comprising a grid having open passageways and positioned horizontally in a layer composed of a particulate material in the sand cell, filter or bed, the open passageways having openings which are larger than said particulate material.

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