First, can a pressure cooker be used to sterilize? Unbelievably, pressure cookers are a tool for mushroom cultivators because they can sterilize the substrate layer used for growing mushrooms. It can also sterilize large quantities of substrates.
It would be best if you used a pressure cooker to kill the microorganisms living in the substrate because they can contaminate your mushrooms, rendering them inedible. Even though pressure cookers only reach 7 PSI (Pounds per Square Inch), they generate sufficient heat to eliminate any pathogens that could contaminate your mushrooms.
Generally, a pressure cooker must reach 15 PSI to sterilize the layer for mushroom cultivation. To prevent contamination during growth, this is the purpose of the pressure used to sterilize the substrate.
Before opening the jars after pressure cooking, allow them to cool because this ensures the quality of the sterilization and prevents thermal shock, which can result in broken jars from rapid temperature changes.
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Why Should You Use Pressure Cooker For Sterilization?
There are numerous reasons for sterilizing items at home, such as sterilizing your kitchen utensils and other household items. At a time in their lives when they have a million other things to concentrate on, many new parents find an Instant Pot (or other brands of pressure cooker) to be a fantastic tool for preparing nutritious meals quickly.
With a pressure cooker, it is possible to prepare a nutritious meal in a matter of minutes after the birth of a baby, when food preparation typically takes a back seat.
A pressure cooker is ideal for steaming vegetables, making soup, and even cooking rice and other grains, allowing parents to eat quickly and healthily.
Most of a parent’s time is also spent cleaning and ensuring that everything that meets the infant is clean and sterile. There are many specialized sterilizing machines and equipment on the market, but you can save space and money by using a pressure cooker.
It is an excellent idea to sterilize baby equipment in a pressure cooker. It is possible to use a pressure cooker to sterilize baby bottles, pacifiers, and other feeding equipment, which is essential for any parent concerned with maintaining a clean environment for their child.
How Long Does Sterilization Take?
How long do substrates need to be sterile? The duration of sterilization is contingent on the substrate used. 15 PSI is necessary for agar and grain. This level of PSI eliminates contamination and decreases the likelihood that you will waste time. Here is a general list of sterilization times calculated at 15 PSI based on the substrate:
Liquid agar solution
Quart-sized grain jars
1 hour and 30 minutes
Large 5-pound grain bags
Large 5-pound sawdust
2 hours and 30 minutes
The sterilization time will vary depending on the size of your pressure cooker and how the bags were stacked. The timer is not started until the pressure cooker is full. Before starting the timer, wait for the pressure cooker to reach 15 PSI. Some individuals have discussed using an autoclave, an expensive pressure cooker used to sterilize substrates.
What Else Can a Pressure Cooker Sterilize?
The only type of sterilization that can be performed in pressure cookers is substrate preparation for mushroom cultivation. Pressure cooking for sterilization is quick, simple, and produces minimal clean-up mess.
Glass jars can be sterilized for sauces, jams, chutneys, nut butter, homemade milk, yogurt, and any of your favorite recipes. We know that storing food in clean, sterilized glass jars and bottles is the most hygienic option.
Tips: Always ensure that the item you intend to sterilize in a pressure cooker can withstand the process. Also, ensure that it can be used in a pressure cooker by consulting the manufacturers’ instructions.
How to use pressure cooker for sterilization
In general, the sterilization procedure for pressure cookers is as follows:
- If you are sterilizing a sample in a container (such as agar), ensure it does not exceed two-thirds of the container’s capacity. Place the lids on the jars, but do not entirely secure them; otherwise, the glass jars will explode. Additionally, you can cover jars and glassware with aluminum foil and secure it with masking or autoclave tape.
- Fill the pressure cooker with water to a depth of 1 to 2 centimeters (not enough to start covering the base of the sample). This should be de-ionized water, which can be obtained from our laboratory’s green faucets without hot/cold symbols. Insert a separator into the bottom of the pressure cooker so that the sample does not come into direct contact with the bottom of the cooker. In the video, only a spoon was used.
- Place the sealed pressure cooker on a hot plate over high heat. Ensure that the pressure valve is fully open.
- When steam begins to escape the pressure valve opening, completely close it, and reduce the heat to medium (approx. half the max). Start the timer when a pressure has built up inside the pot and steam is escaping through the pressure valve. The required sterilization time is typically between 20 and 30 minutes.
- When the time is up, please turn off the hot plate and remove the pressure cooker to allow it to cool for approximately 10 to 15 minutes.
- Then, open the pressure valve gradually until steam no longer escapes. This is possible with the Hawkins Big-Boy by slightly lifting the pressure cap with a fork. If the moisture is released too quickly, the sample will boil explosively and spill all over, and in the worst-case scenario, the glass containers will explode.
- Open the pressure cooker and close the samples’ lids. Caution, it will be boiling.
10 Best Pressure Cooker For Sterilization
When I sterilized my jars for canning, I was always confused about the timing and the pressure requirements, as these variables vary based on the size of the kettle.
There are numerous varieties of pressure cookers on the market, but not all of them are of the same quality, which might lead to fatal results. Prior investigation and study might assist in locating the ideal sterilizer and achieving optimal results.
The seven best pressure cookers for sterilization purposes are listed below. Always ensure that the item you wish to sterilize can sustain pressure, and consult the manual for your pressure cooker to avoid accidents.
1. Best Overall: All American 41.5qt Pressure Cooker/Canner
All American 41.5qt Pressure Cooker/Canner – Exclusive Metal-to-Metal Sealing System – Easy to Open & Close – Suitable for Gas or Electric Stoves – Made in the USA
Many consider the All-American brand to be the best in its field. This tool offers the precision required for sterilization, which you would find helpful. You can access valuable settings, including 5 PSI, 10 PSI, and 15 PSI. The pressure cooker’s professional-grade, extra-heavy-duty, cast-aluminum construction allows for rapid and even heat distribution throughout.
This pressure cooker can hold approximately seven pints of liquid. All American does not recommend using this pressure cooker on a glass-top stove without first consulting the manufacturer. The brand then specifies that doing so is at your own risk. You don’t want to scratch or break the surface.
One individual’s only regret regarding this pressure cooker was that they had not purchased a larger size. The company has a solid reputation for customer service, and if you encounter problems with your pressure cooker, a single phone call can quickly resolve the issue.
- 41.5 Quarts
- Exclusive Metal-to-Metal Sealing System
- Easy to Open & Close
- Suitable For: Gas or electric stoves
- Having the multiple PSI settings come in handy
- Wonderful craftsmanship
- Dedicated customer support
- Heavy-duty reliable pressure cooker
- Lasts for years after purchasing
- Made in the USA
- This pressure cooker is expensive
- Reports of the lid not fitting correctly
- Takes longer to heat than other pots
2. T-fal P4500736 Clipso Stainless Steel Pressure Cooker
T-fal P4500736 Clipso Stainless Steel Dishwasher Safe PTFE PFOA and Cadmium Free 12-PSI Pressure Cooker Cookware, 6.3-Quart, Silver
You can select between 5 PSI, 10 PSI, and 15 PSI from the T-Fal Pressure Cooker. This provides the most significant degree of freedom in choosing the desired pressure. Aluminum does not rust like iron or steel, which is advantageous. However, aluminum has the disadvantage of being more susceptible to discoloration and scuffing than other materials. Two canning racks that can hold sixteen pint-sized jars are included.
This one comes with a recipe book so that you can use it not only for sterilization but also for cooking.
The 10-year limited warranty protects you. You have acquired a large pressure cooker capable of simultaneously sterilizing large quantities of mushrooms. The simplicity of this cooker makes it challenging to make a mistake with it. Even the recipes in the cookbook are simple to follow.
If you have nowhere convenient to store the enormous pressure cooker, it may be a disadvantage for some people. In such situations, it may be more advantageous to purchase a smaller pressure cooker for sterilization, particularly if you intend to use it only for sterilizing mushrooms.
- Cooks Up To 70% Faster
- Durable Stainless-steel Construction
- Innovative One Hand System
- Encapsulated Base
- Dishwasher Safe
- Offers multiple settings to make for the most flexibility
- The 10-year limited warranty backs you up
- Made from aluminum and doesn’t rust
- Highly durable overall
- Lower cost in comparison to other pressure cookers
- Easy to use and clean
- Some have reported that the dial gauge doesn’t make much sense
- The instruction manual doesn’t include much information
- Not the best choice for a novice in sterilization
3. Barton Pressure Canner 22-Quart Capacity Pressure Cooker
Barton Pressure Canner 22-Quart Capacity Pressure Cooker Built-in Pressure Gauge with (1) Rack, Aluminum Polished
With the Barton Pressure Canner, you can be confident in your home. At 13 PSI, this pressure cooker releases pressure. The lid’s secure locking mechanism prevents it from opening as the container’s contents pressurize. This pressure-cooking method is compatible with various surfaces, including sealed electric, gas, ceramic, and electric. This pressure cooker is equipped with racks, making it easier to sterilize bags of substrates.
The zero to twenty PSI pressure range of the Barton Pressure Canner’s pressure gauge. The Barton Pressure Canner’s vague instructions have made this product more difficult to use. The lack of explanation makes it hazardous for novices who may not know how to use pressure cookers safely. Burns is one of the most common injuries from pressure cookers.
It withstands pressure well. You should be aware that it only comes with one rack, but you can easily purchase a second rack for it. Since it will be used for sterilization, you may require an additional rack. This pressure cooker is remarkably effective for the price. Depending on the number of substrates you wish to sterilize, it may be too large for some individuals. The intent also plays a significant role.
- 22 Quart
- Built-in Pressure Gauge
- Spring safety device
- Compatible Heat Source: Gas, Sealed Electric, Ceramic and Electric Coil
- Affordable pricing on this pressure cooker
- Holds the pressure well for sterilizing your things
- You can use this pressure cooker on a variety of surfaces
- Offers you a large capacity
- Does what it says, but don’t expect extras with it
- Only comes with one rack
- Some people may find the size too big
4. Hawkings Bigboy Aluminium Pressure Cooker
This pure virgin aluminum pressure cooker has one drawback: it can only be used on a gas stove. Don’t buy a gas stove if you don’t already have one. To ensure that this item meets your requirements, verify that it is the correct size. This pressure cooker serves between 22 and 30 people so that it can sterilize many substrates. Consider purpose.
Each pressure cooker has been tested to ensure that it is leak-proof. This pressure cooker reached a maximum of 15 PSI, making it an excellent option. The plastic handles are made from durable and reinforced fiberglass for added convenience. This is an excellent option for anyone who may want to sell their mushroom products in the future. This pressure cooker was designed for commercial settings such as universities, schools, hotels, and hospitals.
- 22 Liters capacity
- Shielded safety valve
- Long lasting gasket
- Unbreakable stay-cool plastic handle
- New improved pressure regulator
- Sturdy Fixed pivot
- Can hold a large capacity of between 22 to 30 people
- Made from pure virgin aluminum
- Each holder was tested for being leak-proof
- Reaches up to 15 PSI
- Plastic handles and reinforced fiberglass
- This pressure cooker costs a lot
- Only suitable for gas stoves, which severely limits it
5. Zavor EZLock 10 Quart Stove-top Pressure Cooker & Canner
Zavor EZLock 10 Quart Stove-top Pressure Cooker & Canner – Multi Pressure Settings, Universal Locking Mechanism, Recipe Book & Steamer Basket – 3 1Qt Jar Canning Capacity, Stainless Steel (ZCWEZ05)
The EZLock 10 Quart pressure cooker is available in four sizes: 6 quarts, 8 quarts, 10 quarts, and 12.7 quarts. If you’re looking for a recommendation, we’d suggest the 10-quart container because it can hold ten half-pint jars.
This allows you to cultivate an abundance of spawn at home. It will provide a sterile substrate on which mycelium can colonize. Without it, you risk contaminating your mycelium, which will destroy your mushrooms and waste your time.
This stainless-steel pressure cooker is also attractive. The Zavor EZLock is an effective medium-sized pressure cooker for beginners who may be intimidated by the prospect of using a pressure cooker. You have numerous safety features built in. This pressure cooker has a more contemporary design, and if you’re interested in mushroom cultivation, it comes with its recipes.
- 10 Quarts
- Made of 18/10 stainless steel
- Universal locking lid
- Automatic & Universal Locking Mechanism
- Two pressure settings HIGH (15 psi) and LOW (10 psi)
- Silicone Gasket
- Works on all stoves
- Comes in four available sizes
- Comes in four available sizes
- Many built-in safety features
- Comes with its own recipe book for cooking on the side
- Set it up easily
- Ranges between 8 to 15 PSI
- Some have complained about the pressure in it
- The lid has had problems closing
- Hard to determine if the lid has clamped fully
6. Presto 01362 6-Quart Stainless Steel Pressure Cooker
Presto 01362 6-Quart Stainless Steel Pressure Cooker
This 6-quart pressure cooker is less expensive than the competition and can accommodate six half-pint jars. You may choose this option if you have a limited budget or are unsure whether you want to cultivate mushrooms.
After a while, you can upgrade to a more expensive option. For sterilizing the substrates, many mushroom cultivators began with a small 6-quart pressure cooker, such as the Presto 01362 6-quart.
Remove the sealing ring and the overpressure plug before washing in a dishwasher. You must rinse this part of the pressure cooker by hand. This one is simple to clean, and its use is straightforward. In addition, if you use stainless steel for food preparation, it will not impart a metallic taste to the food.
Sterilization differs from this, but you could use it for cooking your food at some point. The weight on top of the Presto 01362 6-Quart pressure cooker achieves 15 PSI for a quick release.
- Presto 01362 6-Quart Stainless Steel Pressure Cooker
- Cover lock indicator
- 64-Page Instruction/Recipe Book
- Helper handle for ease of handling;
- Extended 12-year limited warranty
- Achieves 15 PSI for the perfect mushroom cultivation
- Includes a steaming plate
- The budget-friendly price tag
- Good to help a starting beginner
- Easy to use
- Some people complain of a loose handle after only a few uses
- Could use more height to the steaming plate
- The lid often doesn’t spin loose
7. Presto 01781 23-Quart Pressure Canner and Cooker
Presto 01781 23-Quart Pressure Canner and Cooker
The Presto 01781 can hold up to 20 half-pint jars. Create many spawns in one pass. This pressure cooker makes everything simpler because space is not a significant issue. At the same time, it is less expensive than alternatives of comparable size. The aluminum-constructed Presto 01781 is not submersible.
Caution should be taken not to use it on an outdoor gas range or LP gas burner with BTUs exceeding 12,000. This can result in property and pressure cooker damage and personal injury. Incorrect use of a pressure cooker can result in an explosion.
Choose a non-abrasive cleaner if you want to maintain the pressure cooker’s shine when cleaning it. This pressure cooker stands out for its user-friendliness. If you have ample storage space, you might purchase this item.
- Constructed of warp-resistant heavy-gauge aluminum
- Deluxe pressure dial gauge
- Complete 80-page instruction/recipe book included.
- Extended 12-year limited warranty
- Can reach up to 15 PSI
- Sterilizes many substrates at once
- Affordable cost for a pressure cooker with a bigger size
- This pressure cooker is easy to use
- Includes a 76-page instruction and recipe book
- The instructions are easy to understand
- 12-year limited warranty
- The size could make it too big for some homes
- You must hand wash this pressure cooker
- Some have said the handle screws loosened after a couple of uses
8. All-American 25 Quart Non-Electric Sterilizer
All-American 25 Quart Non-Electric Sterilizer
First, the 25-quart All-American cannot be used as a pressure canner, but it can be used for sterilization. Thus, it is a suitable substrate for mushroom cultivation. To create steam, only a tiny amount of water is required. Because it employs a metal-to-metal gasket, there is no need to replace an expensive seal. It can attain a maximum of 17 PSI.
This pressure cooker has been used to sterilize physicians, dentists, first aid stations, and laboratories. All-American designed this specifically as a sterilizer, so it cannot be used for canning. Some may view this as a disadvantage if they are uncertain about their interest in mushroom cultivation. However, once purchased, it will last for many years.
Why would you opt for a sterilizer as opposed to a pressure cooker? First, the All-American 25-quart container is less likely to warp. A sterilizer offers more excellent safety than a pressure cooker. To ensure a quality job, someone who wishes to cultivate mushrooms professionally may choose this. Few customers have reported that this sterilizer prevented all their substrates from becoming contaminated, indicating that it is effective. The replacement components from the manufacturer are inexpensive.
- Ideal for doctors, dentists, first aid stations, hospitals, and laboratories for dependable sterilization | Product is not a pressure canner
- Sterilizer Inside capacity – 25 Quarts | Inner container capacity – 17.5 Quarts | Inside dimensions – 10.25” D x 11.75” Diameter | Overall height – 16.25” | Bottom Height – 12.25”
- Pressure gauge conforms to the pressure gauge standard ANSI B40-1-1980 | UL Approved
- Metal-To-Metal Seal | No costly gasket to replace | Equipped with dial gauge, control valve, excess pressure relief valve, and overpressure plug
- Only a small amount of water is needed to create the dry steam | After achieving a minimum temperature of 250°F, and a pressure of 17psi, the dry steam penetrates the bandages or instruments, making them sterile in 35 minutes and ready for immediate use
- Lasts for years after you have purchased it
- Greater safety than with pressure cookers
- Reaches 17 PSI
- Doesn’t cost much for the replacement parts from the manufacturer
- Made by the best aluminum foundry in the nation
- Works exceptionally well as a sterilizer—a good professional choice
- You can only use it as a sterilizer
- Expensive in comparison to other choices
9. Instant Pot Duo 7-in-1 Electric Pressure Cooker
Instant Pot Duo 7-in-1 Electric Pressure Cooker, Slow Cooker, Rice Cooker, Steamer, Sauté, Yogurt Maker, Warmer & Sterilizer, Includes Free App with over 1900 Recipes, Stainless Steel, 8 Quart
Sterilization is not limited to pressure cookers used on the stovetop. Yes, an electric pressure cooker can sterilize glass, silicon, and metal.
According to research conducted at Dakota State University, the Instant Pot is the only pressure cooker capable of inactivating G. stearothermophilus endospores.
Instant Pot’s innovative pressure cookers set the standard for electric pressure cookers. This model pressure cooker is available in 3-quart, 6-quart, and 8-quart capacities.
These electrical appliances perform the functions of six devices simultaneously.
- Pressure Cooker
- Sterilizer Slow Cooker
- Rice Cooker
This Instant Pot features 12 one-touch programs, pre-programmed settings, and the ability to customize your settings. Don’t forget to access the application through your devices to find hundreds of Instant Pot recipes.
They are constructed of stainless steel – fingerprint-resistant exterior and 3-ply stainless steel inner pot, steam rack (with handles), rice paddle, soup spoon, measuring cup, and condensation collector.
Instant Pot has more than ten built-in safety features, including, in my opinion, the two most crucial safety locks and protection against appliance overheating.
The number of items that can be sterilized at once entirely depends on the size of the sterilizer purchased. Consider that a 6-quart pressure cooker is appropriate for families.
- 8 Quart
- 1200 watts
- 7-in-1 Functionality
- Quick One-touch Cooking
- Quick And Easy Clean Up
- Proven Safety Features
- Versatile Inner Cooking Pot
- Can pressure cook, slow cook, steam, sauté, yogurt, warmer, and rice cooker
- 14 one-touch smart programs
- Dishwasher safe
- Doesn’t include an EasySeal lid
10. CONCORD Stainless Steel Home Brew Kettle Stock Pot
CONCORD Stainless Steel Home Brew Kettle Stock Pot (Weldless Fittings) (100 QT/ 25 Gal)
If you are looking for a pressure pot for industrial and commercial use that does not compromise on quality, then the concord steel 100-quart pot is for you. For mass sterilization in industrial settings, you need a pressure cooker, and what better equipment to use than a 100-quart pressure cooker?
This vessel is simple to handle. Its dimensions are 20 inches in height and 21 inches in width, allowing you to store large stencils and implements. When I needed a large pressure cooker for sterilizing large utensils and no such pot was on the market, this pot came to my rescue.
Urgent medical care was required for the rural populace, and sterilizing medical equipment and implements was a pressing need at the time. I discovered this exquisite item and shipped it out immediately after discovering it. The shipment and delivery procedure were very efficient and quick. Upon opening, we discovered a colossal pressure cooker with a large pot and a massive lid to seal it.
The safety mechanisms appeared promising, with lid screws for tightening. The piece is made of stainless steel, so worrying about rust destroying it is unnecessary. Because stainless steel is an exceptional heat conductor, the pot reached the required 15 psi of pressure in record time.
In addition, the dial gauge features three easily adjustable ideal pressure settings. This device, designed for mass disinfection, is more than meets the eye.
It was straightforward to assemble the single components with the included instructions. This pot was clearly distinguished from others by its lid, which could be hung on the side of the pot while the inner pot was being used.
And we are all aware of how annoying it is to find a secure place to rest the lid. This commercial vessel does not include detachable, fully welded pieces for simple cleaning.
Concord has made your life easier by offering one pot equivalent to five pots if you want to perform large-scale sterilization and are searching for multiple pressure cookers.
- 100 Quarts
- Brew Kettle is made from Commercial Quality Stainless Steel, Fully Polished.
- All Accessories included in this set are made from high quality 304 Stainless Steel.
- Lid is hangable on the side of kettle.
- Full weld less construction, so you can remove and clean as needed.
- Kettle (predrilled) will come unassembled for safe shipping. Assembly takes less than 10 mins, only tool required is a wrench or strong hands)
- Budget friendly.
- Can work up to the scale of 5 mid sizes pressure cookers.
- The accessories and pot are made of high-quality stainless steel, which helps in easy asepsis.
- The base of the pot can be off a bit light quality.
Best Pressure Cookers for Sterilization – FAQs
Autoclaving is equivalent to a pressure cooker, especially for small batches. Like an autoclave, the chamber of a pressure cooker reaches temperatures high enough to eliminate bacteria and mold spores.
Start the timer when a pressure cooker has built up inside the pot and steam escapes through the pressure valve. The required sterilization time is typically between 20 and 30 minutes. When the time is up, please turn off the hot plate and remove the pressure cooker to allow it to cool for approximately 10 to 15 minutes.
According to the product literature, electric pressure cookers can reach the necessary temperature and pressure for sterilization. Most can be purchased for less than $150, making them an excellent option for laboratories on a budget.
Experiments at the University of Sao Paulo demonstrated that a pressure cooker is as effective as an autoclave and can reach the required temperatures to kill bacilli. Using a gauze contaminated with bacillus subtilis spores, the effectiveness of deep sterilization was evaluated.
Add one to two inches (2.5 to 5 cm) of water to the pressure cooker. Set your containers inside on something slightly raised off the floor (glass containers may crack if they sit directly on the bottom). Seal the pressure cooker according to the manufacturer’s instructions and heat it on a burner.
After 15 to 30 minutes at 121 °C under a pressure of 106 kPa (1 atm) and a total surface temperature of 121 °C, a typical standard for steam sterilization is reached (Block, 2000).
Place a short rack in the bottom of the pressure cooker, then add 1 cup of water and three pint-sized jars. The jars will not fit inside the pressure cooker with the lid on if the rack is too tall, but you should never place the jars directly on the pot.
You will be fine. However, I recommend adding two or three waters if they are pint jars.
The answer is… possibly. If the pressure is decreased, total sterilization can be achieved only by increasing the sterilization time. If you are in the market for a pressure cooker, you should consider purchasing one with a 15 PSI pressure rating.
As the temperature and pressure increase, the amount of time needed to sterilize objects can drastically decrease. Steam sterilization is more effective than dry heat sterilization because the moisture in steam is a superior heat conductor and penetrates the load more effectively.
Typically, it would be best to use a coil top or a natural gas range to cook with a pressure cooker. The pressure cooker’s weight can cause damage to glass stoves or even shatter the glass. Adhere to the safety instructions in the letter.
Pressure cookers can potentially be dangerous, but if you adhere to the instructions, they pose no greater risk than other kitchen appliances. High temperatures kill contaminants such as mold, fungus, and bacteria in pressure cookers. Always clean your pressure cooker after use so it can be used again.
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