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| Number | Title | Issue Date |
| 4778598 | Separation of ash from regenerated adsorbent A process for separating ash particles from an aqueous slurry containing a mixture of regenerated adsorbent (e.g., carbon) and ash particles includes the steps of settling the slurry to produce a solid phase including the mixture of adsorbent and ash part... | 10/18/1988 |
| 4735729 | Ash concentration and disposal method Suspended ash in wastewater is efficiently concentrated and removed by mixing the ash suspension with thermally conditioned sludge. The solids in the resulting ash/sludge mixture are easily settled and dewatered by conventional means.... | 04/05/1988 |
| 4693827 | Process for protection of biological nitrification systems A method for accelerating the startup of biological nitrification systems for wastewater treatment and preventing or reducing the effects of toxic or inhibitory materials or excursions of pH, temperature or dissolved oxygen upon nitrifying organisms. A ra... | 09/15/1987 |
| 4693831 | Rise-rate control of pulsed-bed granular medium filters A method for controlling the pulsing of a granular medium filter, based on determination of the rise rate of liquid level above the filtration medium. A pulse system is activated whereby sub-fluidizing pulses of a fluid are directed upwardly through the f... | 09/15/1987 |
| 4626354 | Method for anaerobic treatment of high strength liquors A process for treating high strength BOD containing liquors includes the step of mildly mixing and contacting the liquors with anaerobic bacteria and a powdered adsorbent support medium to remove a substantial portion of the organic matter and generate a ... | 12/02/1986 |
| 4620563 | Blowdown pot for a reactor A blowdown pot is provided with an inlet pressure control valve through which the pot receives unwanted residue e.g., ash from a high pressure chemical reactor, and this reactor residue can thereby be continuously or semi-continuously blown out from the h... | 11/04/1986 |
| 4524049 | Process for concurrent steam generation and metal recovery Vanadium and nickel are recovered from fluid coke or fly ash concurrently with cogeneration of steam by a wet oxidation process at 500°-650° F. and elevated pressure, with a leaching pH of approximately 0.3 maintained by generation of sulfuric acid in s... | 06/18/1985 |
| 4517906 | Method and apparatus for controlling auxiliary fuel addition to a pyrolysis furnace A two-stage starved air furnace system is controlled to simultaneously achieve desired temperatures and percent stoichiometric air operation in the primary stage by modulating transformation relay functions acting upon measured temperature deviations to c... | 05/21/1985 |
| 4505210 | Multiple hearth furnace chamber A multiple hearth furnace chamber where each arched or conical hearth is independently supported by the outer metal shell. An expansion joint below each hearth allows for vertical movement of the interior refractory wall panels without significant vertica... | 03/19/1985 |
