| US 7,491,322 B1 | ||
| Apparatus for removing phosphorus from wastewater | ||
| Philip L. Sibrell, Charles Town, W. Va. (US) | ||
| Assigned to The United States of America as represented by the Secretary of the Interior, Washington, D.C. (US) | ||
| Filed on Oct. 01, 2007, as Appl. No. 11/865,127. | ||
| Application 11/865127 is a division of application No. 11/124638, filed on May 04, 2005, granted, now 7,294,275. | ||
| Int. Cl. B01D 21/30 (2006.01) | ||
| U.S. Cl. 210—138 [210/264; 210/906] | 8 Claims |
| 1. A system for removing phosphorus from wastewater, comprising:
waste sludge having an affinity for phosphorus;
a pelletizer to pelletize the waste sludge;
at least first and second flow-through reactors, having the pelletized waste sludge packed therein; and
a timer controller to alternately control flow of the wastewater through the first flow-through reactor for a first period
of time and flow of the wastewater through the second flow-through reactor for a second period of time, the timer controller
repeatedly controlling flow of the wastewater alternately through the first flow-through reactor and the second flow-through
reactor until the pelletized waste sludge is saturated.
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