Onion storage India

Mechanization Fights Inflation took the liberty to borrow part of the text in Anil Chopra┤s Blog, called: If you love your onions but hate inflation, we need your precious 60 seconds on the state of onion storage in India because it is so very true and with a little knowledge regarding ventilation systems for the storage of onions and potatoes the problem can be tackled in a very efficient and adequate way.

The technology to store onions under the right circumstances exists.The onions are there in enormous quantities produced with great effort by local farmers .
The only thing that is required is that the people involved in the onion industry have serious look at the existing systems that are functioning successfully all over the world.

As Anil Chopra requests:
Give it 60 seconds

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Onion storage-issues and solutions, India By Anil Chopra's Blog, Onion storage-Issues

$ 1.52-$ 1.74 per kg is more than twice the price paid by housewives in the Netherlands.

Onion prices have hit around Rs 70-80 a kg in retail during Dec 2010 which is equal to the average wage of $2 for 80% of the India. This is a cold fact. Part of the blame lie in our ancient onion storage systems and inability of all stakeholders in onion industry to establish modern onion storage systems in India.

Tropical short-day onions are very delicate to store because of their very high water contents, their very thin skins and there for cannot be stored in bulk. They will destroy themselves by their own weight. Storage in individual bins should be serious considered.

Onion, being high in water content, is a delicate commodity to store and requires special procedure and parameters, giving rise to the concept of Onion cold storage. Onion is an important vegetable crop grown in India and forms a part of daily diet in almost all households throughout the year. But due to non-availability of appropriate post-harvest storage facilities, 25-30% of the total produced onions are wasted, which in terms of value amounts to Crores of rupees. Building up of the cold storage unit would minimize the waste up to the level of 3 to 4% that would in turn help the onion growers, and stabilize onion prices in market for all types of consumers.

Let's be honest and state the facts. For many people involved in the onion industry the complexity associated with properly storing onions is often overlooked.

Bamboo challis and tatties

Bamboo challis and tatties to store onions, India!

Wooden challis and tatties to store onions, the Netherlands

Wooden challis and tatties to store onions, the Netherlands!

The fact that we Indians can store onions from one harvest to the next in bamboo challis and tatties and maintain outstanding quality, albeit rising prices during non-harvesting season, is taken for granted. The reality is that 30% of onion is wasted during storage. Please download document penned by Director, National Research Centre for Onion and Garlic, Pune at following link and read page no 1.

The reality is that ability to hold onions in long-term storage and deliver quality product months after harvest is directly related to advances in ventilation system design and management. The ventilation system is really the key to maximizing profits from storage. Once the onions are harvested and placed in storage, the ventilation system is the only tool one has to interact with the crop. Anything that we do to the onions will occur using the ventilation system. For example, the processes of curing, cooling to holding temperature and dehumidification are all driven by the ventilation system and its components. In short, the ventilation system is our life-line to the onions.

Ventilation System Design

Cold storage is indeed an option, but extremely expensive and riskful. Why riskful? Just imagine what will happen if onions at 1 to 2░Celcius are suddenly exposed to tropical weather with a temperature of 32░Celsius and a Relative Humidity of 90%. Think about your cold lemonade that you take out of the refrigerator! The carafe gets soaking wet with condense, imagine that happening to tons and tons of delicate stored onions with all their bacteria and pathogens brought from the field. For a more in debt explanation:
Physics of drying and climate control.

The ventilation system can be thought of like a car, in that it is composed of many components and control systems, each one with a specific job. Also like a car, each component must be the right size and the right part, or the car will not function properly. Modern onion ventilation systems are complex and composed of a variety of different components. These commonly include fans, fresh air doors, refrigeration equipment, burner systems, de-humidification equipment and control systems. In order for the ventilation system to operate effectively and promote onion quality, it must be properly deigned, properly installed, and properly controlled considering the product and environmental variables.

The bacteria and the fungi are the culprits of the deterioration of onions during storage. And both cannot prosper in dry and moving air. Low temperatures merely put them to sleep. There for a second temperature range for storing onions should seriously be considered in tropical climates. That is the range from 25░ Celsius to 30░ Celsius. This alternative is far more economical and less risky than managing a Cold Store with all its condensation risks. More on: Temperature ranges for storing onions and which onions are fit for storage.

Proper ventilation system design is the foundation for the success of all onion storage efforts. In order for a ventilation system to function as desired, it must be properly designed and each component must be correctly specified and sized - in short customized as per the prevailing situation.

This is concept is the driving force behind the modern onion storage systems which are engineered and designed to conform to specific standards for airflow rate, fan selection, fresh air door sizing, plenum sizing, duct sizing and configuration, exhaust sizing, refrigeration system capacity, burner system capacity, and controls. The fact is that each component within the system will impact all of the others, and must be selected correctly.
For the rest of this interesting article we send you back to:
Understanding Onion storage-Issues and solutions for India


When product of good quality enters them and the facility is well managed product of good quality will come out.

But if product of bad quality enters these facilities, a disaster is in the make.

These facilities cannot improve the product only maintain its quality if it had quality in the first place.

Have a look at: The 5 Existing Storage Systems

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