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公开(公告)号：WO1992015388A1
公开(公告)日：1992-09-17
申请号：PCT/US1991009242
申请日：1991-12-11
Applicant: ENVIROGUARD, INC.
Inventor： ENVIROGUARD, INC. , RIEBER, Roy, S.
IPC: B01D37/02
CPC classification number: C02F11/008 , B01D39/06 , B01D39/2072 , C02F1/5236 , C04B18/0418 , C04B20/1055 , C04B28/26 , C04B2103/0004 , C04B2111/00784 , Y02W30/91 , Y02W30/92 , Y10S210/912 , C04B7/00 , C04B14/08 , C04B40/00 , C04B18/101 , C04B14/18
Abstract: The present invention describes a filter medium and a method of filtering metals from liquids, such as waste water, in which the metals are filtered from the liquids and are chemically fixed in the resulting filter cake in a nonhazardous and nontoxic form so that they may be disposed of in nonhazardous landfills. When all or a portion of the metals are dissolved, they are first precipitated and then filtered and chemically fixed.
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公开(公告)号：WO1996025363A1
公开(公告)日：1996-08-22
申请号：PCT/US1996002059
申请日：1996-02-15
Applicant: ENVIROGUARD, INC.
Inventor： ENVIROGUARD, INC. , RIEBER, Roy, S.
IPC: C02F01/52
CPC classification number: B03D3/06 , B01D21/0012 , B01D21/01 , C02F1/52 , C02F1/5236 , C02F1/5263 , C02F1/54
Abstract: Disclosed is a combined flocculating and clarifying medium for flocculating and separating solid particles from waste water comprising a mixture of solid filtering or aggregating particles and a dry flocculating agent effective to flocculate the solid particles to form larger and heavier aggregates with the filtering or aggregating particles in the waste water and filtering or gravity separating the formed aggregate from the waste water. Preferably, the filtering and aggregating particles are silicious particles, such as rice hull ash, diatomaceous earth, and perlite. The flocculating and clarifying medium can be combustible or can chemically fix the aggregated solid particles in a silicious cement, which solid particles can include heavy metal particles in silicious cement.
Abstract translation: 公开了用于絮凝和分离固体颗粒与废水的组合的絮凝和澄清介质，其包括固体过滤或聚集颗粒的混合物和干絮凝剂，其有效地絮凝固体颗粒以形成较大和较重的聚集体，其中过滤或聚集颗粒 废水和过滤或重力将形成的骨料与废水分离。 优选地，过滤和聚集的颗粒是硅质颗粒，例如稻壳灰，硅藻土和珍珠岩。 絮凝澄清介质可以燃烧，也可将聚集的固体颗粒化学固定在硅质水泥中，该固体颗粒可包括硅质水泥中的重金属颗粒。
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公开(公告)号：WO1992020430A1
公开(公告)日：1992-11-26
申请号：PCT/US1992001724
申请日：1992-03-05
Applicant: ENVIROGUARD, INC. , RIEBER, Roy, S.
Inventor： ENVIROGUARD, INC.
IPC: B01D37/02
Abstract: Disclosed is a filter aid or medium and a method of filtering liquid wastes having good filtration, good flow rates through the filter area, and heat value of the resulting filter cake containing the filtered solids of at least 5000 Btu per pound of filter aid. Rubber particles in a mesh size range of from about 30 mesh to 325 mesh, alone or with up to about 70 % silicious particles, and preferably a wetting agent is used for the filtration.
Abstract translation: 公开了一种过滤助剂或介质以及过滤具有良好过滤性，通过过滤区域的良好流速的液体废物和含有每磅助滤剂至少5000Btu的过滤固体的所得滤饼的热值的过滤助剂或介质的方法。 筛网尺寸范围为约30目至325目，单独或最多约70％的硅质颗粒，优选润湿剂的橡胶颗粒用于过滤。
