Patents Assigned to enviroGuard, Inc.
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Patent number: 5942115Abstract: 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.Type: GrantFiled: March 20, 1997Date of Patent: August 24, 1999Assignee: enviroGuard, Inc.Inventor: Roy S. Rieber
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Patent number: 5833940Abstract: Disclosed is a commercial grade of soluble silicate solutions, clear homogenous and water white essentially free of unreacted silica, made by dissolving in a closed container biogenetic silica, preferably rice hull ash, in a strong alkali solution, preferably sodium hydroxide in the presence of an agent, such as an active carbonaceous material, which prevents discoloration of the soluble silicates by absorbing and/or reacting with polyvalent metals, organic materials, and the like, in the biogenetic silica as it dissolves in and reacts with the alkali solution. The invention takes advantage of the residue of such active carbonaceous material on the biogenetic silica, such as rice hulls, left by commercial energy burning thereof which effectively prevents discoloration. A solid residue results from the method which is an active carbonaceous material including concentrated manganese from the biogenetic silica, both of which are valuable commercial products.Type: GrantFiled: February 27, 1992Date of Patent: November 10, 1998Assignee: EnviroGuard, Inc.Inventors: Roy S. Reiber, William A. Mallow, Jesse R. Conner
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Patent number: 5637229Abstract: 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.Type: GrantFiled: February 17, 1995Date of Patent: June 10, 1997Assignee: enviroGuard, Inc.Inventor: Roy S. Rieber
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Patent number: 5595667Abstract: 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. The filter aid comprises rubber particle sizes effective to filter solids of different sizes from the liquid, generally in a size range of from about 5 mesh to 325 mesh, alone or with up to about 70% silicious particles. Preferably a wetting agent is used for the filtration especially for water-based liquids.Type: GrantFiled: September 23, 1994Date of Patent: January 21, 1997Assignee: Enviroguard, Inc.Inventor: Roy S. Rieber
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Patent number: 5207910Abstract: 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.Type: GrantFiled: December 11, 1991Date of Patent: May 4, 1993Assignee: enviroGuard, Inc.Inventor: Roy S. Rieber
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Patent number: 5106510Abstract: 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.Type: GrantFiled: March 8, 1991Date of Patent: April 21, 1992Assignee: enviroGuard, Inc.Inventor: Roy S. Rieber
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Patent number: 5078795Abstract: Disclosed is the solidification and chemical fixation of wastes using biogenetic primarily amorphous silica to the waste at ambient temperature and pressure in the presence of a strong alkali and sufficient water in the waste which converts the biogenetic silica into a soluble silicate and sufficient water to form the soluble silicate, and in the presence of a polyvalent metal ion in the waste which reacts with the formed soluble silicate to provide a cementitious product of the waste. In the event there is insufficient strong alkali or water present in the waste to convert the biogenetic amorphous silica to a soluble silicate, and insufficient polyvalent metal ion in the waste to harden and form a cementitious product, amounts of these components as necessary can be added along with the biogenetic silica to the waste.Type: GrantFiled: March 1, 1991Date of Patent: January 7, 1992Assignee: enviroGuard, Inc.Inventors: Jesse R. Conner, Roy S. Rieber
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Patent number: 5008021Abstract: Disclosed is the solidification and chemical fixation of wastes using biogenetic primarily amorphous silica to the waste at ambient temperature and pressure in the presence of a strong alkali and sufficient water in the waste which converts the biogenetic silica into a soluble silicate and sufficient water to form the soluble silicate, and in the presence of a polyvalent metal ion in the waste which reacts with the formed soluble silicate to provide a cementitious product of the waste. In the event there is insufficient strong alkali or water present in the waste to convert the biogenetic amorphous silica to a soluble silicate, and insufficient polyvalent metal ion in the waste to harden and form a cementitious product, amounts of these components as necessary can be added along with the biogenetic silica to the waste.Type: GrantFiled: January 26, 1990Date of Patent: April 16, 1991Assignee: enviroGuard, Inc.Inventors: Jesse R. Conner, Roy S. Rieber