Liquid purification or separation – Processes – Treatment by living organism
Patent
1998-10-06
2000-03-21
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
210609, 210622, 2101951, 210202, 210903, C02F 330
Patent
active
060398744
ABSTRACT:
An apparatus and method for treating and reusing the wastewater discharged from agricultural animal farms. The apparatus and method of the present invention is designed to be a zero discharge system in which no wastewater will be discharged or spray irrigated. The wastewater effluent is first passed through a mechanical screen were bulk solids are separated and partially de-watered. The screened effluent is then directed to a primary plastic-lined earthen lagoon where it undergoes aerobic digestion utilizing specially selected bacteria. After treatment in the primary lagoon, the wastewater effluent is used to wash the floors of the hog houses or undergoes a purification phase including solids separation/denitrification, filtration and sterilization. The solids separation/denitrification phase (clarification) preferably takes place in an anoxic environment in preferably above-ground tanks where suspended solids removal will occur as well as denitrification for nitrate reduction. The clarification process may be facilitated through use of polymer addition. The majority of solids will be sent to a plurality of drying beds for de-watering and subsequent removal.
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Derrick, Jr. John R.
Samad Nidal A.
Teran Alfredo J.
Willoughby W. Todd
Wood Richard G.
AJT & Associates, Inc.
Upton Christopher
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