Basics of Freeze Drying
What is Freeze Drying in layman terms?
Freeze drying, in simple terms, is a process of removing moisture from something (usually food or medicine) by freezing it and then slowly heating it in a way that the ice turns directly into water vapor without going through a liquid phase. Thus Freeze Dryer preserves the item for a longer time while maintaining its shape, taste and nutrients because it avoids the damage that can happen with traditional drying methods, like heat drying or air drying.
Which all food products can you freeze dry?
- Fruits: Such as strawberries, bananas, apples, and blueberries. Freeze-dried fruits make popular snacks and can be used in cereals or desserts.
- Vegetables: Examples include peas, corn, carrots, beet, bell peppers, okra, potato, onion etc. Freeze-dried vegetables are often used in soups, stews, and ready to eat/ready to cook meals.
- Dairy products: Like yogurt and cheese. Freeze-dried dairy products can be used for convenience and extended shelf life.
- Meats: Including chicken, lamb and turkey. Freeze-dried meats are used in various dishes, including ready to eat/ready to cook meal packs.
- Seafood: Such as shrimp, fish and scallops. Freeze-dried seafood can be rehydrated for use in pasta dishes, soups, carresoles, ready to eat/ready to cook meal packs.
- Eggs: Egg yolk or egg whites can be freeze-dried and used in recipes.
- Desserts: Halwa, Sheera, Jalebi, Ice cream and even certain cakes can be freeze-dried, creating lightweight, shelf stable treats.
- Instant coffee: Freeze-dried coffee is a common form of instant coffee due to its convenience and long shelf life.
- Herbs and spices: Freeze-dried herbs and spices maintain their flavor and aroma and are used to season various dishes.
- Baby food: Some baby food products like fruit puree, yogurt bites are freeze-dried for easy storage and preparation.
- Ready-to-eat-meals: Freeze-dried meals often combine various ingredients, including meats, vegetables and sauces, to create convenient and lightweight options to carry.
- Mushrooms: Button mushroom, Cordyceps are extensively freeze dried to be used in soups and in wellness products. Freeze Dried cordyceps are used in cordyceps tea and premium chocolates.
What are the different elements within Freeze Drying Systems?
Refrigeration system : Refrigeration system freezes the product and cools the coil to trap the moisture released from the frozen food in the drying chamber
Heating System : Heating system provides the necessary heat required for sublimation
Vacuum System : Vacuum system reduces the pressure in the drying chamber to enable boiling of water at sub zero temperatures.
Working of all the systems in harmony is required to remove the water from the product when it is in iced state and trapping that moisture on the vapor trap in the form of ice.
Is Freeze Drying, Sublimation and Lyophilization same?
Yes. Freeze Drying is also referred as lyophilization or drying by sublimation. Freeze Dryers are also called as freeze drying systems, Freeze Dried machine and lyophilization systems. https://en.wikipedia.org/wiki/Freeze_drying
What is the cost of freeze drying per kg?
Though the cost of freeze drying varies from product to product and is also dependent on seasonal factors like humidity, height from sea level etc. However, it can be safely assumed that it costs anywhere between INR 30 – INR 45 per kg for freeze drying 1 kg of meals with a 30% solid content.
How much time it takes to freeze dry?
Batch time for freeze drying is different for different products. However, batch time in commercial freeze dryer provided by us is much lower (50% or more) as compared to home freeze dryer which takes about 36-50 hours to freeze dry most of the products. Most of the products in our freeze dryers are done within 12-18 hours.
Is Freeze Drying costly?
Compared to conventional methods of drying like hot air drying, tray drying or spray drying, freeze drying is expensive as it happens under sub zero product temperatures and hence requires more energy. Suitable design and appropriate refrigeration system, vacuum system and heating system can help in energy efficient freeze drying process . Despite its higher processing cost, freeze drying remains the gold standard among all food preservation technologies. The nutritional value, product shrinkage and rehydration capabilities of final product is best when its freeze dried.
I own a profitable restaurant in Gurgaon and want to scale this business to multiple cities like Mumbai, Indore, Guwahati by leveraging cloud kitchen model ? How can freeze dryer help me in doing this?
Our restaurant partners can utilize their central kitchen in one city by installing a freeze dryer there. They can freeze dry gravies, exotic veggies and their signature sauces. These freeze dried products are shelf stable and hence can be easily transported through courier mode to any place. These products can be then added as ingredients by rehydrating with water for your final prep dishes. With this model you achieve consistency in your dishes along with the scalability of business model that you desire without investing money in hiring master chefs in each location.
Why should you choose Freeze Dryer from DNS Global Foods
Why should we buy freeze dryer from DNS Global Foods?
We have accumulated seven years of expertise in the freeze drying industry, initially focusing on the sale of freeze dried food products before expanding into our line of freeze dryers. Our unparalleled experience in handling a diverse array of freeze dried food products will prove invaluable as you embark on your own production journey.
What are various options to buy Freeze Dryer from DNS Global Foods?
- You can buy freeze dryer by making full payment
- You can buy freeze dryer in quick and easy EMI with zero interest (subject to bank guarantee for full amount)
- You can take freeze dryer on rent (subject to availability) for a period of 24 months.
- You can buy a used freeze dryer (subject to availability)
What are the different capacities of freeze dryers that are available for purchase from DNS Global Foods?
Our freeze dryers are custom made for clients. The freeze dryers are built to specifications to manage the agreed input capacity of specified products as agreed with the clients beforehand.
What are the different types of freeze dryer machines that are made by DNS Global Foods?
Radiant type freeze dryer : In radiant type freeze dryer machine, food is frozen in an external blast freezer and the heat required for sublimation in the drying chamber is provided through radiation.
Conductive type freeze dryer : In conductive type freeze dryer machine, food is frozen externally or in the same drying chamber and sublimation heat is provided through conduction.
Do you sell Freeze Dryers from any marketplace?
No. We cater to requirements placed directly to us through the modes of communication mentioned on our website.
+91 7227970076
dnsglobalfoods@gmail.com
Do you buy back freeze dryers if we want to upgrade to a large freeze dryer?
Yes
What is the difference between home freeze dryer and freeze dryer from DNS Global Foods?
Our Freeze Dryers are made from industrial grade components meant for 24/7, 365 days operations. Since freeze drying batch time range from 10-20 hours, it is essential that components that are used are of top quality for hassle free operations.
What is the warranty on freeze dryer from DNS Global Foods?
1 year from date of dispatch. All components are sourced from reputed brands with presence in India.
What is the smallest size Industrial grade freeze dryer available from DNS Global Foods?
Our Industrial grade freeze dryer range starts from 10 Kg input capacity onwards.
Do you make camel milk powder machine and goat milk powder machine?
Yes. We make freeze dryers suitable for making freeze dried camel milk powder and freeze dried goat milk powder. Visit https://youtu.be/aJZZh2lUirw to see our freeze dryer in action.
How are Freeze Dryers from DNS Global Foods different than other freeze dryers in India?
Our quotes include capacities which you can load in one go. For example you can load 50 Kg input in one go in our 50 Kg freeze dryers. However, in 50 Kg freeze dryer from other suppliers you can load 17 Kg in one go and hence you have to load and unload product 3 times in a day to get the desired 50 kg input capacity. In a nut shell, our 50 kg freeze dryers are much bigger than 50 kg freeze dryers from other suppliers. Secondly, batch time for any freeze drying cycle involves a freezing time and a drying time. More often than not, when a batch time of 8 hours is committed by other suppliers, it only includes the drying time and NOT the freezing time and defrosting time required to make the freeze dryer ready for next batch. Hence 3 batches a day in a freeze dryer of other suppliers with each batch taking 8 hours is virtually impossible. Always consider these points before making a decision to buy a freeze dryer from any supplier.
We are in a R & D phase and not sure what capacity freeze dryer will be required once we enter commercial production. Can we take a freeze dryer on rent?
Yes. We offer freeze dryer on rent for capacity upto 50 Kg on a case to case basis. The rentals vary from INR 1500/day to INR 3000/day for a minimum agreement period of 24 months upon furnishing bank guarantee equivalent to machine price. During the lease period, we take care of any service requirements .
I have a freeze drying business in Mumbai and now looking for 10 Kg Freeze Dryer on rent in Bangalore and another 50 Kg Freeze Dryer on rent in Delhi. How can we do the agreement?
We offer freeze dryer on rent for capacity upto 50 Kg on a case to case basis. The rentals vary from INR 1500/day for 10 Kg Freeze Dryer to INR 3000/day for 50 Kg Freeze Dryer. These Freeze dryers are installed at customer’s premises . The agreement is for a minimum period of 24 months. During the lease period, we take care of any service requirements . During the rental period if the customer wishes to purchase the same unit or a new unit with a different capacity , balance rental amount of the existing freeze dryer is waived off.
Buyback offer on Freeze Dryer by DNS Global Foods? What does it mean?
We offer a buy back price to our buyers who wish to upgrade to a higher capacity freeze dryer by selling their existing freeze dryers . Our buy back offers are applicable on new and refurbished freeze dryers.
What is the best way to communicate and get a quick reply on queries?
Mail at dnsglobalfoods@gmail.com and share detail about the products you want to freeze dry and the input capacity required per day. We will carefully study your requirements and suggest the right equipment for you. Alternatively, WhatsApp us on +91-7227970076 for a chat reply.
Refurbished Freeze Dryer by DNS Global Foods
We are looking for used freeze dryer in India ? Can you help?
We also buy and sell used and refurbished freeze dryers. You can get in touch with your requirements at dnsglobalfoods@gmail.com
How can I buy a used ,second hand or refurbished freeze dryer from DNS Global Foods? Will I get a warranty and service if I buy a used freeze dryer?
Since we are in the business of Freeze Dryers, we are also approached by sellers and buyers for used freeze dryers. All second hand freeze dryers are refurbished before being offered to the buyers and standard warranty of 1 year (unless otherwise stated) and service support is offered to the buyer. However, we generally expect buyers to be aware of prices of new freeze dryers of similar configurations so that they can evaluate the deal and offer that they are getting on second hand freeze dryer. Mostly, we also expect the buyer to know the input capacity per day that she is looking for and the budget she has in mind. We source freeze dryers from sellers across the world to match clients budget. So its not a matchmaking exercise of making buyer and seller meet each other. Instead, we refurbish the freeze dryers to suit the buyers requirements and then sell that used freeze dryer to the buyer. Within second hand and used freeze dryer segments, we deal from 0.5m2 (5 Kg input per batch ) to 200m2 ( 2 ton/2000 kg input per batch) refurbished industrial freeze dryers.
Government support for setting up Food Processing plant
There are various subsidy schemes of government wherein we get 15% to 35% subsidy on new machines. In that case, what are the incentives to buy a used and refurbished freeze dryer?
In a food processing business, you require various types of machineries for pre processing to post processing and packaging. Almost all subsidy schemes have a subsidy limit and a project cost limit over which the subsidy may not be available. So as a wise entrepreneur, you can opt for buying new machines for which you don’t have an alternative of used machines and avail subsidy on those machines. In this way, you can maximize the benefit of availing government subsidy while not compromising on your budget and business requirements of owning a freeze dryer.