The Ultimate Beginner’s Guide to Post-harvest Hermetic Technology

At the same time, the decreased oxygen level inside a hermetic container also inhibits bacterial and fungal or mold growth. Food needs to remain free of mold growth since toxic substances, such as aflatoxin, found in mold can lead to serious health issues when ingested. According to WHO, consuming food with high levels of such substances can damage the liver leading to cancer or organ failure, birth defects, and toxicity to the immune system. These substances are known to have ill effects on both humans and livestock.

Hermetic storage utilizes a controlled atmosphere so effectively that the quality of its contents remains in the same state, even during extended storage periods. However, hermetic technology is only applicable to dried commodities. If commodities with high moisture content, such as fresh fruits and vegetables, are placed within a hermetic container, mold will develop and damage will occur.

When iron tools were invented, these hermetic underground pits became more varied in depth and shape. Some were found to be bottle-shaped while others were in the shape of a gourd or a pitcher. Despite this range across different continents, experts believe that these hermetic storage pits were effective in keeping food safe from outside elements, insects, and other scavenging animals.

Hermetic storage technology allows farmers to fumigate their organic commodities without using harmful pesticides. This is done by flushing carbon dioxide or nitrogen gas into the hermetic unit via a valve or opening. By doing so, insects are eliminated more quickly while keeping commodities organic.

Safely treating organic commodities is crucial in keeping food products safe while also mitigating the increase of pesticide resistance amongst insects, which has been an escalating problem in recent years due to the improper application of chemical pesticides.

Organic products are seen to be a healthier choice when it comes to daily food consumption. But storage and handling of such products can be a challenge without hermetic technology. With it, however, organic food can remain intact and preserved even during handling or transport. Using certified storage solutions such as the GrainPro Hermetic Bag and Cocoon Indoor, consumers can be sure that their food products remain organic.

Extreme weather events have become frequent in recent years, and the agricultural sector has been severely affected–more often in developing countries. This is because smallholder farmers in such countries still widely use traditional methods when handling their harvested crops. Unfortunately, even stored commodities are prone to damage due to sudden rainfall or flash floods.

Insect activity has also increased due to rising global temperatures since insects are ectothermic, meaning the temperature in their environment directly affects their growth, reproduction patterns, and metabolic rates. Simply put: the high temperatures increase the metabolic rates of insects, making them eat more and reproduce more.

In 2020, farmers in East Africa feared for their livelihoods due to the threat of a locust plague triggered by above-average rainfall from the previous year. Thanks to technology and the quick action from governments and NGOs, losses amounting to $1.5 trillion worth of agricultural products were averted, as stated by the FAO.

The resolution of this near-catastrophe shows that technology should be integrated into solving agricultural issues. And thanks to hermetic technology, more and more farmers are learning the benefits of being climate-smart for their post-harvest storage.

Hermetic technology is also a big help in transporting dry commodities during transoceanic journeys. Keeping commodities in a hermetically-sealed container minimizes the damage that condensation can cause. This is particularly useful for high-value commodities shipped in bulk, so unexpected delays like the 2021 Suez Canal blockage won’t be detrimental to businesses.

However, even bagged commodities stored in PP sacks or jute bags are vulnerable to damage during transit. Condensation regularly occurs and “rains” down on the contents of a shipping container, often leading to mold growth and spoilage. This can happen to coffee beans, spices, and other valuable commodities. To prevent this, container liners that are gas- and moisture-tight can be utilized. This way, an added layer of barrier protects the commodities being transported. Moreover, any insects embedded within the commodities will eventually be eliminated, ensuring no infestation will spread.

Asia & The Pacific

Farmers in Pakistan began to use seeds and hermetic storage provided by Haji Sons and soon saw their profits increase by up to 25%. The red chili peppers they stored in GrainPro bags retained color and shine, did not develop molds, and were insect-free. This attracted premium buyers and resulted in double benefits for the farmers. The increase in profits that farmers are experiencing is a significant development for Pakistan’s rural residents, who account for more than 80% of the country’s poor.

 Latin America

Fundación Tortilla founded by Rafael Mier, has been working hard to preserve one of the roots of Mexican culture: tortillas. But Rafael quickly found that maize, the main ingredient of tortillas, was prone to insect infestation and damage from the hot and humid Mexican climate. This prompted Rafael to look for solutions and discovered hermetic technology. He learned that coffee growers use GrainPro bags to preserve the quality of their beans, and he knew friends who used the bags to export grains to the US to ensure their products arrived safely.

Fundación Tortilla has since started promoting GrainPro bags to those who take in-person and online classes on improving the state of maize in Mexico.

In Honduras, Diana Osorto has worked with the International Women’s Coffee Alliance to help empower women smallholder coffee farmers. By promoting hermetic technology to rural women and their communities in general, Diana observed that they learn how to preserve the quality of their coffee beans, fight food insecurity, and increase their household incomes. At the same time, women in agriculture help take care of their land the way they care for their families.