Fish oil is oil derived from the tissues of oily fish. Fish oils contain the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).


Turnkey Project of Fish Oil Plant

LINGFINE uses the international advanced negative pressure fish oil making technology. Generally the whole fish oil production line includes the following sections:

Meat mincing, conveying, discharging, cooking, oil-slag separating, filtration, refining.

And the refining process includes: dephosphorization, degumming, deacidification, hydration, bleaching, deodorization etc. After treatment, the edible fish oil made by our machine can be white snow color.

Below we will simply introduce you the production process of animal oil making plant:

Fish Oil Cooking Technology process

Process Parameter:

Residue oil in cake: About 20%

Moisture in cake: ≦ 6%

Impurity in crude oil ≦0.2%

Process Introduction

Unpacking Crushing Section

After unpacking on unpacking platform, by conveyor, the raw materials will be  conveyed to crushing machine, crushed into particles with size φ 3mm-5mm, the particles need to be uniform.

Preheating Conveying Section

After crushing, raw materials enter into preheating pot, by thermal oil heating, preheating mixing and thawing, reach a solid-liquid mixed state for vacuum conveying in order to achieve pipeline type conveying process requirements.

Negative Pressure Cooking Section

After preheated to solid-liquid mixed start in preheating pot, the raw materials will be conveyed to cooking pot, when the cake is heated and melted, the stirring device is opened to make the material uniformly heated and non-stick.

Vacuum Dehydration Section

Adopts water jet type vacuum jet pump to produce negative pressure in cooking pot, vacuum pipeline is equipped with condenser. The water molecules and peculiar smell micro molecular volatiles in the raw materials are separated rapidly from the raw oil in vacuum state, and then flow into tube condenser. The condensed water is reused and the exhaust is absorbed by activated carbon

Oil-slag Separating Section

Chain type oil-slag separator is used in this section, oil slag separating drying, can efficiently separate slag skin oil, conducive to oil press, trapezoidal stainless steel grid plate can solve the grid congestion, ageing oil deterioration. Separated oil slag will be conveyed to oil press machine for pressing.

Oil Pressing Section

By horizontal screw extruder, the separated slag is pre-pressed, pre-pressing cake is conveyed to screw oil press machine for second time pressing, efficiently reduce oil residue, keep cake protein; Pressed cake will be conveyed to meat powder workshop.

Crude Oil Filtration Section

The filter can efficiently reduce the labor intensity of workers, to ensure the stability of production, oil-slag separation efficiency is high, oil impurity content is below 0.1%, improving oil refining rate and refined oil quality in the following process.

Fish Oil Refining Process of animal oil plant

Process Introduction

Degumming Dephosphorization

The process of removing colloidal impurities from oil is called degumming, and the colloidal impurities in crude oil are mainly phospholipids, therefore, oil plants often call degumming as dephosphorization. The methods of degumming are hydration, heating, adding acid and adsorption etc.


Alkaline refining is a refining method that uses alkali to neutralize the free fatty acids in fats and oils, to produce fatty acids, salts (soap) and water, and soap to absorb part of the impurities and to separate them from the oil. The formed sediment is called soapstock. The alkalis used to neutralize free fatty acids are sodium hydroxide (caustic soda), sodium carbonate (soda ash) and calcium hydroxide etc. Caustic soda is widely used in the production of oil and fat industry.


There are many methods for decolorization of oils. The most widely used method in industrial production is adsorption decolorization. In addition, there are heating decolorization, oxidation decoloration and chemical reagent decolorization etc.


After the degumming, deacidification and decoloration process, there are still peculiar smells, a small amount of free fatty acids and the decomposition products such as aldehydes, ketonesof etc. In oil. The process of removing odorous substances in oils is called deodorization.