Method for recovering peptides/amino acids and oil/fat from one or more protein-containing raw materials, products produced by the method, and use of the products

Abstract

According to a first aspect, hydrolysation of a protein-containing raw material and separation of amino acids/peptides is carried out, wherein the hydrolysation is effected by using the endogenous enzymes of the protein-containing raw material. The hydrolysate is passed through a membrane filter, wherein peptide/amino acids follow a permeate stream, whilst the active enzymes continuously break down any protein residues that are deposited on the membrane surface. The enzymes are passed together with retenate back to the hydrolysis. Furthermore, an amino acid and peptide product and an oil product are described and the use thereof is disclosed.

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         27 . A method for recovering peptides/amino acids and oil/fat from a protein-containing raw material, wherein the method comprises:
 a. grinding the raw materials;   b. heating the ground raw materials to temperatures in the range of 40-62° C.;   c. optionally before and/or after the heating step, separating oil/fat from the raw materials in order to obtain a first oil product;   d. adding water which has approximately the same or the same temperature as the raw materials, and wherein the pH of the water is adjusted by adding calcium;   e. hydrolysing the raw materials with endogenous enzymes in order to prepare a hydrolysate;   f. optionally during the hydrolysation step, adding a pH adjuster in order to maintain the desired pH value of the hydrolysate;   g. removing solid particles and non-hydrolysed proteins which can be returned to the hydrolysis from the hydrolysate;   h. periodically or continually separating off fat/oil in order to obtain a second oil product;   i. optionally treating the hydrolysate against microorganism growth, with UV treatment;   j. separating off the molecular weight fraction of peptides/amino acids desired by membrane filtration, of crossflow type;   k. routing the portions of the hydrolysate that do not penetrate the membrane filter in point j back to the hydrolysis in step e;   l. concentrating and optionally drying the permeate in order to obtain peptides/amino acids; and   m. wholly or partly returning the distillate from the concentration to the permeate side of the membrane filter.   
     
     
         28 . The method according to  claim 27 , wherein the method takes place as a closed process. 
     
     
         29 . The method according to  claim 27 , wherein the pH adjuster in step f is nitrogen gas or bone meal. 
     
     
         30 . The method according to  claim 27 , wherein the method further comprises dividing the solid particles from step g into hydroxyapatite, protein residues and other solid particles. 
     
     
         31 . The method according to  claim 27 , wherein the second oil product recovered in step h is passed through a filter, and any heavy portions are removed in order to obtain a cold-pressed, protein-free sterile oil. 
     
     
         32 . A method for the hydrolysation of one or more protein-containing raw materials and the separation of amino acids/peptide, characterised in that the hydrolysation is carried out using the endogenous enzymes of the protein-containing material or materials; and that the hydrolysate is passed through a membrane-like filter, wherein peptides/amino acids follow a permeate stream, whilst the active enzymes continuously break down any protein residues that are deposited on the membrane surface and the enzymes are passed together with the retenate back to the hydrolysis. 
     
     
         33 . A method for removing peptides and amino acids from a hydrolysis mixture, characterised in that the hydrolysis mixture comprising active enzymes, amino acids, peptides and non-converted proteins is passed through a membrane filter, wherein amino acids and any peptides are filtered off and the active enzymes present act to break down proteins that are deposited on the membrane filter. 
     
     
         34 . The method according to  claim 27  for producing a pharmaceutical product. 
     
     
         35 . The method according to  claim 27  for producing a biotechnological product. 
     
     
         36 . The method according to  claim 27  for producing a food product. 
     
     
         37 . The method according to  claim 27  for producing a feed product. 
     
     
         38 . The method according to  claim 30  for producing hydroxyapatite. 
     
     
         39 . Amino acids/peptides produced by the method according to  claim 27 , wherein the amino acids/peptides do not contain allergens and DNA traces, are virtually fat-free and have a salt content of <0.5% by weight. 
     
     
         40 . The oil produced by the method according to  claim 31 , wherein the oil does not contain allergens or DNA traces. 
     
     
         41 . The hydroxyapatite produced by the method according to  claim 30 , wherein the hydroxyapatite does not contain allergens or DNA traces.