Product made by recovering bone and oil from animal byproducts

Abstract

Product made by separating bone and oil from marine byproducts. The byproducts are ground and warmed to a relatively low temperature of approximately 70 deg. C. or less. The warmed material is passed to a refiner to separate the bone from the meat portions. The meat portion is transferred to a digestion tank where the endogenous enzymes perform a first stage digestion. Exogenous enzymes may be added and further digestion may take place for increased liquefaction of the meat portion. The exogenous enzymes can survive temperatures higher than the 60-65 deg. C. range so the liquified material can be heated during the further digestion to increase hydrolysis and pasteurize the product. Oil may be removed from the product by centrifuge following completion of either digesting step. Evaporation of the product may be used to increase the percentage of solid material. Alternatively, the oil may be removed after digestion without mechanically deboning the byproducts.

We claim:  
     
         1 . Product made by removing oil from animal byproduct material and comprising the steps of warming the temperature of said animal byproduct material to a temperature of less than 95 deg. C., digesting said animal byproduct material in a first digesting step to substantially liquify said animal byproduct material and centrifuging said animal byproduct material to remove said oil.  
     
     
         2 . Product according to  claim 1  wherein said animal byproduct material is marine byproduct material.  
     
     
         3 . Product according to  claim 2  wherein said marine byproduct material is warmed to a temperature of less than 70 deg. C.  
     
     
         4 . Product according to  claim 2  wherein said digesting of said marine material is subject to predetermined pH and predetermined time conditions.  
     
     
         5 . Product according to  claim 4  wherein said pH is controlled between 3.0 and 8.5.  
     
     
         6 . Product according to  claim 5  wherein said predetermined time ranges between 10 minutes and 40 days.  
     
     
         7 . Product according to  claim 6  wherein said centrifuging of said oil is followed by further processing of said removed oil.  
     
     
         8 . Product according to  claim 7  wherein said marine byproduct material is ground before said warming.  
     
     
         9 . Product according to  claim 8  wherein said marine byproduct material is mechanically deboned following said warming.  
     
     
         10 . Product according to  claim 9  and further comprising subjecting said material to a second digesting step, adding exogenous enzymes during said second digesting step and increasing the temperature of said material during said second digesting step.  
     
     
         11 . Product according to  claim 9  and further comprising centrifugally decanting said oil following said second digesting step.  
     
     
         12 . Product according to  claim 1  wherein said marine byproduct material is warmed to a temperature of less than 55 deg. C.  
     
     
         13 . Product made by removing bone from marine byproduct material and comprising the steps of warming said ground marine byproduct material to a temperature less than 95 deg. C. and deboning said ground marine byproduct material.  
     
     
         14 . Product according to  claim 13  and further comprising grinding said marine byproduct material prior to said warming of said marine byproduct material.  
     
     
         15 . Product according to  claim 13  wherein said marine byproduct material is warmed to 70 deg. C.  
     
     
         16 . Product according to  claim 15  wherein said material is warmed to a temperature of less than 55 deg. C.  
     
     
         17 . Product according to  claim 13  wherein said deboning is mechanical deboning.  
     
     
         18 . Product made by recovering bone and oil from marine byproduct material and comprising the steps of grinding said marine byproduct material to reduce the size of solids therein, warming said marine byproduct material to a temperature of less than 70 deg. C., deboning said warmed marine byproduct material, digesting said marine byproduct material to substantially liquify said marine byproduct material and centrifuging said marine byproduct material following said digestion to remove said oil.  
     
     
         19 . Product according to  claim 18  wherein said marine byproduct material is warmed to a temperature of less than 55 deg. C.  
     
     
         20 . Product according to  claim 19  and further comprising adding exogenous enzymes to said digested marine byproduct material, heating said material to a second temperature, digesting said material in a second digesting step and centrifuging said material to remove said oil.  
     
     
         21 . Product according to  claim 20  wherein said material is evaporated following said centrifugation of said product and removal of said oil.  
     
     
         22 . Product according to  claim 21  wherein dry vegetable protein is added to said material following said evaporation and said product is co-dried.  
     
     
         23 . Product according to  claim 21  wherein said material is acid stabilized following said evaporation.  
     
     
         24 . Product according to  claim 4  wherein said time for said first digestion step is between thirty (30) minutes and sixteen (16) hours.  
     
     
         25 . Product according to  claim 7  wherein said cleaning and/or polishing of said oils is a second centrifugation step to remove water and other contaminants from said removed oil  
     
     
         26 . Product according to  claim 13  and further comprising adding exogenous enzymes to said marine byproduct material.  
     
     
         27 . Product according to  claim 26  wherein said exogenous enzymes are commercially available proteolytic enzymes.  
     
     
         28 . Product according to  claim 3  wherein said marine material is warmed to a temperature of less than 55 deg. C.  
     
     
         29 . Product made by removing oil from animal byproduct material and comprising the steps of warming the temperature of said animal byproduct material to a temperature of less than about 95 deg. C. and higher than about 55 deg. C., incubating and digesting said animal byproduct material in a first incubating and digesting step using the naturally occurring endogenous proteolytic enzymes of said animal byproduct material to liquefy said animal byproduct material and centrifuging said liquefied animal byproduct material to remove said oil.  
     
     
         30 . Product according to  claim 29  wherein said animal byproduct material is marine byproduct material.  
     
     
         31 . Product according to  claim 30  wherein said marine byproduct material is warmed to a temperature of less than 70 deg. C.  
     
     
         32 . Product according to  claim 30  wherein said digesting of said marine material in said first digesting step is subject to a pH between 6.5 and 7.5 and said time for digestion is between thirty (30) minutes and forty (40) hours.  
     
     
         33 . Product according to  claim 32  wherein said pH is controlled between 3.0 and 8.5.  
     
     
         34 . Product according to  claim 33  wherein said time extends between thirty (30) minutes and forty (40) hours.  
     
     
         35 . Product according to  claim 34  wherein said centrifuging of said oil is followed by cleaning and/or polishing of said oil to remove contaminants and additional water.  
     
     
         36 . Product according to  claim 35  wherein said marine byproduct material is ground before said warming.  
     
     
         37 . Product according to  claim 36  wherein said marine byproduct material is mechanically deboned following said warming.  
     
     
         38 . Product according to  claim 37  and further comprising subjecting said material to a second digesting step, adding exogenous enzymes during said second digesting step and increasing the temperature of said material during said second digesting step.  
     
     
         39 . Product according to  claim 37  and further comprising centrifugally decanting said oil following said second digesting step.  
     
     
         40 . Product according to  claim 29  wherein said marine byproduct material is warmed to a temperature of less than 55 deg. C.  
     
     
         41 . Product made by removing bone from marine byproduct material comprising the steps of warming said marine byproduct material above the temperature of digestion naturally occurring in said marine byproduct material and which digestion utilises endogenous enzymes and occurs at a pH of above about 6.2 and at pH of less than about 8.5, said marine byproduct material being warmed to a temperature of less than about 95 deg. C. and higher than a temperature of about 55 deg. C. and subsequently deboning said byproduct material.  
     
     
         42 . Product according to  claim 41  and further comprising grinding said marine byproduct material prior to said warming of said marine byproduct material.  
     
     
         43 . Product according to  claim 41  wherein said marine byproduct material is fish waste, whole fish and/or fish bycatch and said marine byproduct material is warmed to a temperature less than 70 deg. C.  
     
     
         44 . Product according to  claim 41  wherein said deboning is mechanical deboning.  
     
     
         45 . Product produced by recovering bone and oil from marine byproduct material comprising the steps of grinding said marine byproduct material to reduce the size of solids therein, warming said marine byproduct material to a temperature greater than that wherein naturally occurring digestion takes place but less than 70 deg. C. and higher than about 50 deg. C., deboning said warmed marine byproduct material, incubating and digesting said marine byproduct material in a first digesting step using the endogenous enzymes of said marine byproduct material to liquefy said marine byproduct material and centrifuging said marine byproduct material following said first digestion step to remove said oil.  
     
     
         46 . Product according to  claim 45  wherein said marine byproduct material is warmed to a temperature of less than 55 deg. C.  
     
     
         47 . Product according to  claim 46  and further comprising adding exogenous enzymes to said digested marine byproduct material, heating said material to a second temperature, digesting said material in a second digesting step and centrifuging said material to remove said oil.  
     
     
         48 . Product according to  claim 47  wherein said material is evaporated following said centrifugation of said product and removal of said oil.  
     
     
         49 . Product according to  claim 48  wherein dry vegetable protein is added to said material following said evaporation and said product is co-dried.  
     
     
         50 . Product according to  claim 49  wherein said material is acid stabilized following said evaporation.  
     
     
         51 . Product according to  claim 50  and further comprising packaging and storing said material.  
     
     
         52 . Product according to  claim 50  and further comprising packaging and storing said acid stabilised material.  
     
     
         53 . Product according to  claim 32  wherein said time for said first digestion step is between thirty (30) minutes and sixteen (16) hours.  
     
     
         54 . Product according to  claim 35  wherein said cleaning and/or polishing of said oil is a second centrifugation step to remove water and other contaminants from said removed oil.  
     
     
         55 . Product according to  claim 41  and further comprising adding exogenous enzymes to said marine byproduct material.  
     
     
         56 . Product according to  claim 55  wherein said exogenous enzymes are commercially available proteolytic enzymes.  
     
     
         57 . Product according to  claim 31  wherein said marine material is warmed to a temperature of less than 55 deg. C.