Safguarding food safety of baby leaf vegetables at a vertical farm

Although it is home to 5.6 million people, the city-state of Singapore is located on a small island that covers merely 715 square kilometers (276 square miles). As a consequence of crowding, it has been necessary to expand upwards, accommodating residents and businesses in high-rise buildings. Land is in such great demand in Singapore that only 1% is used for conventional farming, with local food production meeting less than 10% of residents’ nutritional needs. But now agriculture, too, is reaching for the skies: investment is increasing in indoor vertical farming.

This trend is being encouraged by the Singapore Food Agency (SFA), the authority with the mission of ensuring that the nation has a resilient supply of food safety and food security from farm-to-fork. The SFA calculates that multi-story LED vegetable farms can produce 10 to 15 times more Vegetables, per square meter, than conventional farms.

One leader in the shift to vertical farming is Sustenir Agriculture, which runs indoor farms in Malaysia and Hong Kong and will open another in Jakarta by early 2023. Sustenir describes itself as specializing in growing “superfoods for supercities, farming at the heart of demand in urban populations to minimize carbon footprint whilst maximizing positive impact in local communities.”

Sustenir’s Singapore farm, in the Sembawang district at the northern tip of the state, employs 90 people and occupies 4,000 square meters (43,000 square feet) over four floors of a light industrial building that has multiple commercial tenants. Here, baby leaf crops are grown in five to six layers on rigs 2.5 meters (8.2 feet) high.

Sustenir harvests crops daily all-year-round, selling them as 100% clean, with no need for washing before eating. The company’s indoor farm uses no pesticides, generates 92% less carbon emissions than imported produce, and consumes 95% less water than conventional farming on arable land. The company recently decided to take care of food safety and product quality by investing in its first optical sorting machine from TOMRA Food.

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