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| Number | Title | Issue Date |
| 7402247 | System for wastewater treatment and digestion having aerobic and anaerobic treatment zones The specification discloses a method for treating and digesting organic wastes in a wastewater stream. A first wastewater influent stream is mixed with an activated sludge biomass in an aerobic digestion zone, so that least a portion of the organic wastes in the fir... | 07/22/2008 |
| 6878282 | System and method for withdrawing permeate through a filter and for cleaning the filter in situ A system is provided for withdrawing permeate from a substrate. The exemplary system includes a vessel having a wall configured to contain substrate, a compartment positioned adjacent the wall of the vessel and configured to receive substrate from the vessel, and a ... | 04/12/2005 |
| 6627082 | System and method for withdrawing permeate through a filter and for cleaning the filter in situ A system is provided for withdrawing permeate from a substrate. The exemplary system includes a vessel configured to contain substrate, two or more compartments configured to receive substrate from the vessel and to return a portion of received substrate ... | 09/30/2003 |