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PKC HYDROLYSIS COMBINED WITH REMOVAL OF SHELL MATERIAL

IP.com Disclosure Number: IPCOM000239458D
Publication Date: 2014-Nov-10
Document File: 7 page(s) / 253K

Publishing Venue

The IP.com Prior Art Database

Abstract

The palm kernel is the edible seed of the oil palm tree. The fruit yields two distinct oils - palm oil derived from the outer parts of the fruit, and palm kernel oil derived from the kernel. The pulp left after oil is rendered from the kernel is formed into "palm kernel cake" (PKC), used e.g. as a high-protein feed for ruminants. The palm kernels are normally separated from the shells using a mechanical process. However, the PKC will comprise some shell material. PKC can be upgraded by enzymatic hydrolysis to a protein and fat enriched feed material (termed “upgraded PKC”) used e.g. for feeding an animal such as a mono-gastric animal such as a chicken.

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Page 01 of 7

PKC HYDROLYSIS COMBINED WITH REMOVAL OF SHELL MATERIAL

INTRODUCTION

     The palm kernel is the edible seed of the oil palm tree. The fruit yields two distinct oils - palm oil derived from the outer parts of the fruit, and palm kernel oil derived from the kernel. The pulp left after oil is rendered from the kernel is formed into "palm kernel cake" (PKC), used e.g. as a high-protein feed for ruminants. The palm kernels are normally separated from the shells using a mechanical process. However, the PKC will comprise some shell material.

     PKC can be upgraded by enzymatic hydrolysis to a protein and fat enriched feed material (termed "upgraded PKC") used e.g. for feeding an animal such as a mono-gastric animal such as a chicken (c.f. e.g. WO 2009/074685 for details regarding enzymatic hydrolysis).

     The standard specification of PKC is to have in-between 4-11 w/w % shell material. The shell material is presumed almost completely in-accessible for enzymatic treatment such as enzymatic galactomannan and cellulose hydrolysis in the process of upgrading PKC.

     The shell material besides containing lignin also contributes to the total amount of carbohydrates and thus contributes negatively to the lignin and fiber content in the residual "upgraded PKC" material after enzymatic hydrolysis and/or fermentation.

     A method for providing a shell reduced PKC material allows for a more complete hydrolysis of accessible carbohydrates, potentially less lignin content and consequently a higher final protein content and lower fiber content which is highly desirable for a chicken feed ingredient.

     The present invention relates to a process for production of a PKC based animal feed (e.g. a feed for a mono-gastric animal such as chickens) comprising complete or partial removal of shell material from PKC and hydrolysis (e.g. by one or more enzymes) of the PCK in order to generate "upgraded PKC". The removal of the shell material can be before or after or simultaneously with the hydrolysis or alternatively after fermentation/distillation/drying.

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PROCESS FOR REMOVAL OF SHELLS

     PKC contains agglomerates of PKC meal that falls apart when mixed in water and subjected to enzymes. It has been observed that the hard shell pieces in the PKC remained unchanged in size (pieces from ~1-15 mm) after enzymatic hydrolysis.

     A PKC slurry at e.g. 30% dry matter is highly viscous but does in less than a 1h become liquefied by addition of a process relevant dose of enzyme (such as in the range from 0.05 to 2.5 mg enzyme protein/g dry matter).

     The new separation process is suggested to be liquefaction the PKC slurry enzymatically and then pump it through a screen to separate the larger shell pieces. This could for example be during transfer from a continuous liquefaction reactor to a hydrolysis/fermentation reactor or alternatively after fermentation/distillation/drying.

     The shell material can be completely or partly removed from the PKC material using one or more of the fo...