Apparatus and method for purification of agricultural animal waste
Patent 6193889 Issued on February 27, 2001. Estimated Expiration Date: February 17, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
210/609, Including dewatering sludge210/195.1, Serially connected distinct treating or storage units210/196, Of filtrate210/202, Diverse type210/620, Aerobic treatment210/622Of separated liquid
The present invention is drawn to a unique apparatus and method for treating and reusing the wastewater discharged from agricultural animal farms. The apparatus and method of the present invention may be readily sized and configured depending upon the amount and constituent(s) of the wastewater to be treated. In a first embodiment, 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. In use, the apparatus and method of the first embodiment may actually require addition of make-up water during periods of low rainfall to make-up water losses due to evaporation and drift. It is contemplated that the only byproduct of the apparatus and method of the first embodiment may be a beneficial sludge if a sufficient number of installations are operated. In a second embodiment, the apparatus and method of the present invention provides a treatment system capable of reducing the nutrient loading in a step-wise fashion so that the wastewater can be used from different steps of treatment in order to apply the varying nutrient loads required by crops on a seasonal basis.
Other References
Stith, Pat and Warrick, Joby, "Boss Hog: North Carolina's pork revolution", The News & Observer, Feb. 19-26, 1995, p. 1-3
Stith, Pat and Warrick, Joby, "New studies show that lagoons are leaking", The News & Observer, Feb. 19, 1995, p. 1-8
Stith, Pat and Warrick, Joby, "Lacking staff, DEM finds it hard to challenge status quo", The News & Observer, Feb. 19, 1995, p. 1-3
Stith, Pat and Warrick, Joby, "Law restricts hog information, even from N.C. officials", The News & Observer, Feb. 19, 1995, p. 1-3
Stith, Pat and Warrick, Joby, "Corporate takeovers", The News & Observer, Feb. 21, 1995, p. 1-6
Stith, Pat and Warrick, Joby, "For Murphy, good government means good business", The News & Observer, Feb. 22, 1995, p. 1-6
Stith, Pat and Warrick, Joby, "The smell of money", The News & Observer, Feb. 25, 1995, p. 1-5
Stith, Pat and Warrick, Joby, "Who's in charge?", The News & Observer, Feb. 26, 1995, p. 1-6
Stith, Pat and Warrick, Joby, "Boss Hog: Information Sources", The News & Observer, p. 1-6
"Policy Recommendations for Management of Agricultural Animal Waste in North Carolina", Report of the Agricultural Animal Waste Task Force, Nicholas School of the Environment, Apr. 1996, p. 1-2
"Pork Powerhouses 1996", Successful Farming, SF Pork Powerhouses Oct. 1996, p. 1-5
February 17, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
