Method of treating wastewater

Liquid purification or separation – Processes – Treatment by living organism

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Details

210617, 210615, 210620, 210622, 210629, 210800, 210805, C02F 330

Patent

active

055318940

ABSTRACT:
A method of improving the quality of septic tank effluent is disclosed. Sewage wastewater having a significant concentration of waste solids is flowed to a septic tank. In the septic tank the solids are allowed to separate from the wastewater to form a relatively clear horizontal liquid layer between sludge and scum layers. At least a portion of the liquid layer is flowed from a recirculation outlet through an aerobic filter to produce a filter effluent. The filter effluent is flowed to the septic tank. A septic tank effluent is discharged from a septic tank discharge outlet which is spaced apart from the inlet and which is in fluid communication with the liquid. The septic tank effluent has reduced levels of total nitrogen, BOD and total suspended solids.

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patent: 3666106 (1972-05-01), Green
patent: 4251359 (1981-02-01), Colwell et al.
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patent: 4439323 (1984-03-01), Ball
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patent: 5288407 (1994-02-01), Bodwell et al.
Enhanced Nitrogen Removal Using a Modified Recirculating Sand Filter by Sandy et al., from the 5th ASAE Conference Dec. 14-15, 1987.
Ekofinn Bioclere.TM. brochure on, self-contained wastewater treatment plants copyrighted 1986, p. 4.
Ekofinn Bioclere brochure for Bioclere Systems Published Nov. 17, 1994, Four Pages.
The Bioclere Process (Typical Bioclere System) Published Nov. 17, 1994, Two pages.

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