| US 7,351,330 B1 | ||
| Iron and hydrogen sulfide removal apparatus | ||
| Robert T. Fader, Willmar, Minn. (US); and Wes J. Gunderson, Willmar, Minn. (US) | ||
| Assigned to Willmar Water & Spas, Willmar, Minn. (US) | ||
| Filed on May 25, 2005, as Appl. No. 11/136,898. | ||
| Claims priority of provisional application 60/578725, filed on Jun. 10, 2004. | ||
| Int. Cl. C02F 1/74 (2006.01) | ||
| U.S. Cl. 210—120 [137/143; 137/205; 137/416.3] | 6 Claims |
| 1. A system for controlling operation of a water filtration system having an aeration tank and a filtration tank, the system
comprising:
a pressure sensor for measuring a pressure in the aeration tank;
an air pump connected to the aeration tank;
a valve for opening and closing a bleed passage connected to the aeration tank; and
a pressure control for controlling the air pump and the bleed passage based on the pressure measured in the aeration tank,
wherein the pressure control activates the air pump to supply air to the aeration tank and activates the valve to open the
bleed passage when the pressure in the aeration tank reaches a minimum pressure level so that the pressure in the aeration
tank steadily increases, and the pressure control deactivates the air pump to discontinue supplying air to the aeration tank
and deactivates the valve to close the bleed passage when the pressure in the aeration tank reaches a maximum pressure level.
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