Process for recovering livestock food from cattle excreta waste

• US 3,919,433 A
• Filed: 06/14/1974
• Issued: 11/11/1975
• Est. Priority Date: 06/14/1974
• Status: Expired due to Term

• Current Assignee: Franklin C. Senior
• Original Assignee: Franklin C. Senior
• Inventors: Senior, Franklin C.
• Primary Examiner(s): Bashore, S. Leon
• Assistant Examiner(s): Schor, Kenneth M.
• Application Number:
  US05/479,192
• Time in Patent Office: 515 Days
• Field of Search: 426/478,495,481,373,374,320,807,431,364,212 71/21,22 210/2,53,18,52 260/112R,122
• US Class Current: 426/320
• CPC Class Codes: A23K 10/26 from waste material, e.g. feathers, bones or skin A23K10/24 takes precedence
• CPC Class Codes: Y10S 426/807 Poultry or ruminant feed
• CPC Class Codes: Y10S 530/859 Waste, waste material, refuse or sludge, e.g. effluents, fecal matter

Abstract

A cattle excreta waste and recycle brine solution slurry first has ash components removed, following which it is separated in a perforate basket centrifuge separator rotated at a prescribed speed with a part of the flocculating agents added, whereby a floc cake is formed in the separator which also serves to remove fine suspended proteins, fats and the like from the liquid portion of the slurry. The damp cake is sterilized and dried to form the recycled feed. The liquid from the separator is transferred to a settling tank, with solids being removed therefrom and separated via a solid bowl centrifuge. Liquid supernate from the tank and the centrate liquid from the centrifuge are recycled in the process, with a portion of the clear sterile supernate being disposed of to a salt flat or evaporator. The solids from the centrifuge, after suitable drying, are also used as recycled livestock feed.

Claims

1. A PROCESS FOR RECOVERING LIVESTOCK FOOD FROM CATTLE EXCRETA WASTE WHICH COMPRISES THE STEPS OF, IN THE ORDER STATED;

MIXING SAID EXCRETA WASTE WITH A RECYCLE BRINE SOLUTION IN THE RATIO RANGING FROM 12-14 TO 1 OF SAID BRINE SOLUTION TO EXCRETA WASTE TO FORM A SLURRY INCLUDING SOLID PORTIONS;

MECHANICALLY SEPARATING SAID BRINE SOLUTION AND SAID SOLID PORTIONS OF THE SLURRY FROM ASH COMPONENTS IN THE SLURRY FLOCCULATING A FIRST SOLID COAGULABLE CONSTITUENT FROM SAID BRINE SOLUTION, UTILIZING A PROTEIN COAGULANT;

CENTRIFUGING SAID COAGULABLE CONSTITUENT FROM SAID BRINE SOLUTION IN A RANGE OF 400 TO 800 TIMES GRAVITY FIELD;

TREATING THE AFORESAID BRINE SOLUTION WITH GASEOUS OZONE AND A PORTEIN COAGULANT;

SETTLING THE AFORESAID BRINE SOLUTION TO PROVIDE A SECOND SOLID COAGULABLE CONSTITUENT;

CENTRIFUGING THE SECOND SOLID COAGULABLE CONSTITUENT IN THE RANGE OF 800 TO 1200 TIMES GRAVITY FIELD;

MIXING THE CENTRIFUED SECOND SOLID COAGUABLE CONSTITUENT WITH SAID FIRST COAGUABLE CONSTITUENT, PROVIDING A DAMP LIVESTOCK FOOD;

ADDING A VOLATILE STERILIZING AGENT TO THE COMBINED LIVESTOCK FOOD, AND DRYING SAID LIVESTOCK FOOD;

AND

2. A process for making a nutritious additive for cattle feed from shredded cattle excreta waste, which comprises:

mixing said shredded excreta waste with a recycle brine solution to form a slurry;

mechanically removing ash constituents;

flocculating a first coagulable constituent from said slurry, utilizing a protein coagulent;

centrifuging the slurry in the range of 400 to 800 times gravity field to separate the mother brine solution and the first coagulable solid portion thereof;

treating said separated mother brine solution with ozone gas and a protein coagulant;

gravity concentrating solids from the treated separated mother brine solution;

centrifuging the gravity concentrated solids in the range of 800-1200 times gravity field;

mixing the solids from said two centrifugings, to provide said nutritious additive;

sterilizing said nutritious additive with a sterilizing agent; and

removing a selected fraction of solution from aforesaid mother brine solution and adding an equivalent volume of water, providing a recycle bRine solution.

3. A process for recovering nutrients from cattle excreta waste which comprises the steps of:

mixing said excreta waste with recycle brine solution to form a slurry;

mechanically removing ash components from the slurry;

mixing a quantity of FeCl3 with said slurry, followed by mixing a quantity of CaO therewith to flocculate coagulable constituents;

centrifuging said flocculated constituents to separate the liquid and solid portions, said centrifuging being carried out in the range of 400 to 800 times gravity field;

treating said separated liquid portion with ozone gas and adding further materials to flocculate coagulable constituents;

gravity concentrating said gasified and further flocculated liquid portion to produce a recycle brine solution and a damp solid portion;

centrifuging said damp solid portion in the range of 800-1200 times gravity field, the liquid obtained therefrom being added to said recycle brine solution and the solids added to the separated solids;

sterilizing and drying all said separated solids; and

removing a selected fraction of solution from aforesaid brine solution and adding a corresponding volume of water, providing a recycle brine solution.