Why Your Groundnut Oil Turns Cloudy or Smells Off—And How Refining Solves It

Are you a groundnut oil producer struggling with cloudy oil, unpleasant odors, or short shelf life? You're not alone. A common challenge many face is that freshly pressed crude oil becomes turbid or develops off-flavors within months. The root cause often lies not in the pressing itself, but in the missing step that guarantees quality: refining.

At Henan Glory, we understand that quality is what builds trust and grows your business. Let's break down how a dedicated groundnut oil refining machine transforms crude oil into a clear, stable, and market-ready product by removing specific impurities at each stage.

1. Degumming: Eliminating Turbidity

The cloudiness and sediment you see in stored crude oil are primarily caused by phospholipids. Customers reject cloudy oil, hurting your sales.

Our Solution: In our degumming process, crude oil is heated and stirred while a phosphoric acid solution is introduced. This causes phospholipids and other colloids to coagulate. After settling, these impurities are removed, resulting in a visibly clearer oil that stays stable on the shelf.

2. Deacidification: Ensuring Freshness & Longevity

Free Fatty Acids (FFA) are responsible for off-flavors and rapid spoilage, directly cutting into your profits.

Our Solution: Through a controlled reaction with an alkaline solution in our deacidification system, FFAs are neutralized and removed as soapstock. This crucial step significantly extends your oil's shelf life and ensures a clean, neutral taste.

3. Decolorization: Creating the Perfect Golden Hue

Crude groundnut oil's dark color, from natural pigments and oxidation, is less appealing to consumers who expect the attractive golden-yellow oil seen in stores.

Our Solution: Our decolorization process uses activated clay under precise heating and stirring to adsorb these pigments. The result is a consistently beautiful, market-favored color that enhances your product's visual appeal.

4. Deodorization: Delivering a Neutral, Pure Taste

Unwanted raw or burnt notes (often from pressing variations) can deter consumers. Modern buyers prefer a clean, neutral edible oil.

Our Solution: Our deodorization pot operates in a high-temperature vacuum. This steam-strips all volatile odor compounds without oxidizing the oil, guaranteeing a bland, pure flavor profile that meets consumer expectations.

Scalable Solutions for Your Growth

Our batch refining systems are ideal for plants processing under 20 tons daily. As you expand, the system can be upgraded to a semi-continuous setup (e.g., with a continuous deodorization tower), boosting capacity to 30 tons/day with better efficiency.

For large-scale operations exceeding 30 tons daily, we provide fully continuous, automated refining lines designed for maximum throughput and consistent, premium quality.

Invest in the quality that builds your brand. If you're facing issues with oil clarity, shelf life, color, or odor—or if you're planning a new or upgraded your peanut oil refining line—let's connect.

Contact us for more details
Official Web:
http://www.cookingoilmillmachinery.com
http://www.palmoilprocessingmachine.com 
WhatsApp: +86 13526627860 (https://wa.me/8613526627860)

Peanut Oil Production Line: Complete Solutions by Henan Glory for Efficient, High-Quality Peanut Oil Processing

If you're a peanut oil manufacturer looking to boost yield, cut costs, and deliver consistent, premium-grade oil to market—Henan Glory's 4-stage peanut oil processing line is your turnkey solution. Designed for scalability (from small-batch to 2000TPD industrial plants), our integrated equipment combines advanced technology to maximize your profitability.



Stage 1: Peanut Oil Pretreatment & Pre-Pressing Machine
Our pretreatment system handles cleaning, crushing, softening, flaking, cooking, and pre-pressing—all optimized to protect peanut nutrients and enhance oil release.
What This Means for You:
Reduced waste: High-precision cleaning (vibrating screens + magnetic separators) removes 99% of impurities (stones, dust, metal), preventing equipment wear and oil contamination.
Higher yield: Flaking machines compress peanuts into uniform thin flakes, increasing surface area for better oil extraction in later stages.
Enhanced flavor: Controlled cooking denatures proteins without burning, preserving peanut oil's natural aroma (a top consumer demand).
Flexibility: Our pre-press machine works for peanuts, soybeans, or rapeseed.

Stage 2: Peanut Oil Solvent Extraction Plant
Even the best pre-pressing leaves residual oil in peanut cake. Our solvent extraction system (D.T.D system + condenser + recovery units) extracts most remaining oil—boosting total yield significantly (vs. pressing alone).
Why This Is a Game-Changer for Your Business:
Low operational costs: Closed-loop solvent recovery cuts raw material expenses.
High-value byproducts: Defatted cake is rich in protein—sell it as animal feed to add extra revenue.
Availability: Our system adapts to a capacity of 30+t/d.

Stage 3: Peanut Oil Refining Machine
Crude oil (from pressing/extraction) contains impurities (free fatty acids, pigments, odors) that fail food safety regulations. Our 4-step refining process (degumming, deacidification, decolorization, deodorization) transforms crude oil into refined, bleached, deodorized (RBD) oil—ready for international markets.
Degumming: Removes sticky phospholipids (gums) to keep oil clear and stable.
Deacidification: Reduces sour-tasting free fatty acids for better flavor and longer shelf life.
Decolorization: Removes unwanted pigments to give oil a clean, appealing appearance.
Deodorization: Eliminates off-odors to preserve peanut oil’s natural, pleasant aroma.

Stage 4: Peanut Oil Filling Machine
Your product's final impression matters. Our fully automated filling line (unscramble, fill, screw cap, label) ensures consistency, safety, and speed—critical for meeting tight delivery deadlines.

Ready to Transform Your Peanut Oil Production?
Whether you're upgrading an existing line or building a new plant, Henan Glory delivers a solution is best for you.


Official Web:
http://www.cookingoilmillmachinery.com 
http://www.edibleoilrefinerymachine.com 
WhatsApp: +86 13526627860 (https://wa.me/8613526627860)
Email: market@doinggroup.com

How many types of cooking oil expeller can be chosen to produce peanut oil?

 

There are mainly three types cooking oil expeller that can be chose to produce peanut oil: single screw cooking oil expeller; automatic temperature control cooking oil expeller and automatic temperature control vacuum filtration integrated cooking oil expeller.

The following is the details of these three types cooking oil expeller for you to take notes.

1.Single screw cooking oil expeller is easy to operate, suits for new beginner with small scale peanut cooking oil processing plant. The advantages of single screw cooking oil expeller is small footprint, low cost, wide range of application.

Single screw cooking oil expeller

2.Automatic temperature control cooking oil expeller can adjust the temperature freely by customers’ requirements. The advantage of this kind of cooking oil expeller is that it uses electric heating ring device to heat the expeller, which replaces the conventional startup by materials friction heating way. This reduces preheating time, energy consumption and machine wear. It is mainly suitable for small and medium-sized peanut cooking oil processing plants.

Automatic temperature control cooking oil expeller

3.Automatic temperature control vacuum filtration integrated cooking oil expeller integrates the functions of temperature control, squeezing, filtration and other functions. With its high efficiency and excellent squeezed edible oil quality, it has become the choice of many peanut cooking oil processing plant.

Automatic temperature control vacuum filtration integrated cooking oil expeller

Our company have exported cooking oil expeller over 90 countries. And we got many good feedback photos and videos from our customers. If you also want to set up a peanut cooking oil processing plant, welcome to contact Henan Doing Company to get the cooking oil expeller and the other whole set of cooking oil processing machine customized service!

Contact information:

 WhatsApp/wechat/Mobile:008613526627860
E-mail: sales@doingoilmachine.com
http://www.cookingoilmillmachinery.com

How to ensure groundnut oil processing machine running smoothly in edible oil mill plant?

 If the peanut oil processing machine runs smoothly, then the peanut oil processing efficiency and plant operation efficiency will be more guaranteed. So how to ensure groundnut oil processing machine running smoothly in edible oil mill plant? Here are four strategies for you: purchase high quality groundnut oil processing machine, install machine and operate machine normally, clean groundnut thoroughly, check machines regularly.

More details,please read this article. 

If you are interested in the oil pressing equipment,please contact us:

WhatsApp/wechat/Mobile:
008613526627860
E-mail: sales@doingoilmachine.com
http://www.cookingoilmillmachinery.com

How much cooking oil can be extracted from 1T groundnut?

 

We all know that groundnut oil content is 40-51%, so in the groundnut oil processing process, how much cooking oil can be extracted from 1T groundnut? Henan glory can give you a range for reference: about 360-460 kilograms cooking oil can be extracted. The detailed groundnut cooking oil extraction rate is affected by groundnut quality, processing technology, processing equipment.

The groundnut quality is one of the direct elements that affect the groundnut cooking oil extraction rate. The type, storage time and storage mode of groundnut all have a certain extent influence on the yield of peanut oil. So it’s suggested to choose high quality groundnut raw material for cooking oil processing.

The processing technology is another pivotal element affect the groundnut cooking oil extraction rate. There are mainly two kinds of processing technology, one is direct pressing way and the other is pre-pressing & solvent extraction way. Comparatively speaking, the processing technology of pre-pressing & solvent extraction way is more complex, but the groundnut cooking oil extraction rate is higher.

Last but not the least, the processing equipment will also affect the the groundnut cooking oil extraction rate. The groundnut cooking oil processing machine with advanced extracting technology will improve the groundnut cooking oil extracting efficiency, includes the groundnut processing capacity and the groundnut cooking oil output.

（Groundnut cooking oil processing equipment

If you have trouble finding suitable groundnut cooking oil processing machine, welcome to Henan Glory Company and have a factory visiting! We can customize you with the design, manufacture, installation, commissioning and other services of large, medium and small groundnut cooking oil processing machines.

 Contact imformation:
WhatsApp/wechat/Mobile:
008613526627860
E-mail: sales@doingoilmachine.com
http://www.cookingoilmillmachinery.com

What's the preparatory work for extracting peanut oil in edible oil mill plant?

   In order to maximize the economic benefits of peanut oil extracting in edible oil mill plant, the following five aspects of preparatory work need to be completed in advance: peanut cleaning, peanut shelling, peanut crushing, peanut flaking and peanut cooking.

More details,please read this passage👇

http://www.edibleoilextractionmachine.com/faq/preparatory_work_for_extracting_peanut_oil_466.html

Peanut Oil Manufacturing Process

Main machines of peanut oil manufacturing process

Peanut Cleaning

Screening machine, de-stone machine and magnetic separator are the common cleaning machine for pre-treatment of peanut in oil extraction plant. They are adopted to remove certain impurities such as sand, stone, and metal, so that to improve the oil yield and production efficiency, and reduce wear rate of accessories. The immature, mildewed and broken peanuts should also be separated by the grading screen, which can be used to produce second grade peanut oil or be sold separately.

Husking

Husking machine is needed to remove the shells.

Crushing

Groundnut can be pressed as whole seeds in peanut oil making machine. But after crushing and flaking by use of roll crusher and flaking machine, the oil yield can be significantly increased. During the crushing process, the red skin of peanuts can be separated by wind selector, and to be used as raw material for medicine and chemical industry.

Flaking

The flaking machine is ued to flake the fruits, so as to make the peanuts reach the beast state before being pressed.

Cooking / Steaming

Roasting temperature is the key factor to produce peanut oil with fragrance. Too low, the fragrance will be weak, too high, it is easy to burn. In most situation, 180℃~200℃ is suitable. In order to prevent over cooked, the seeds should be cooled immediately, and then be crushed in toothed roller crusher.

Oil Pressing Process

Screw type peanut oil making machine is used in this process. Pressing temperature: 135℃; Moisture content 1.5%~2%. The residual oil rate can be reduced to 2% with twice pressing process. The crude peanut oil will be filtered by plate and frame filter, and then be sent to the refining machine. The oilcakes can be further processed in solvent extraction workshop to extract the residue oil, or be sold to feed mill plant. (Read more about defatted peanut flour production.

Peanut Oil Refinery

In some cases, the expeller pressed oil is required to be refined to produce high quality edible oil. 

Oil refining machine

If you want to make peanut oil, welcome to contact us!

Contact information:

Email: sales@doingoilmachine.com   

Website: http://www.cookingoilmillmachinery.com

WhatsApp/Wechat/Mobile: +86 13526627860