×

Separation of biocomponents from manure

  • US 9,371,356 B2
  • Filed: 06/27/2013
  • Issued: 06/21/2016
  • Est. Priority Date: 06/27/2013
  • Status: Active Grant
First Claim
Patent Images

1. A substantially continuous process for separating a stream rich in fibers, amino acids and peptides and a stream rich in minerals from raw farm manure, said process comprising the steps of:

  • providing a raw manure stream for treatment, said raw manure stream containing magnesium ammonium phosphate, calcium phosphate, amino acids, peptides, fibers and minerals, said minerals containing nitrogen, phosphorus, potassium and sulfur, said manure stream containing pathogen levels exceeding 6×

    105 MPN/mL;

    mechanically removing particles having a predetermined size by a screening step;

    reducing pathogen levels in the raw manure stream by between a factor of 3.3 to about a factor of 5, said reducing pathogen levels in the raw manure stream being accomplished by treating the raw manure stream in a clarifier at about 7 percent solids with between about 10 parts per million and about 25 parts per million on a dry weight basis of acrylamide/Ethanaminium, N,N,N-trimethyl-2-((1-oxo-2-propenyl)oxo)-, chloride copolymer, said acrylamide/Ethanaminium, N,N,N-trimethyl-2-((1-oxo-2-propenyl)oxo)-, chloride copolymer having a weight average molecular weight of between about 3 million and about 10 million;

    precipitating magnesium ammonium phosphate and calcium phosphate, said precipitating being accomplished by the addition of between about 5 parts per million and about 75 parts per million on a dry weight basis of polydicyandiamide polymer, said polydicyandiamide polymer having a weight average molecular weight of between about 3000 and about 150,000; and

    separating the stream rich in amino acids, peptides and fibers from the stream rich in minerals, said separating being accomplished in a dissolved air flotation device, said separating being accomplished by adding micronized air of a size between about 10 micrometers and about 20 micrometers at a rate between 5 to 10 cubic feet per hour to the dissolved air flotation device and by the addition of between about 10 parts per million and about 75 parts per million on a dry weight basis of acrylamide/Ethanaminium, N,N,N-trimethyl-2-((1-oxo-2-propenyl)oxo)-, chloride copolymer, said acrylamide/Ethanaminium, N,N,N-trimethyl-2-((1-oxo-2-propenyl)oxo)-, chloride copolymer having a weight average molecular weight of between about 3 million and about 10 million.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×