Dolefresh state-of-the-art ripening facilities in the north of the UK. In total it will have 32 ripening rooms
Materials scientists from The University of Queensland (UQ) are set to revolutionise the fresh fruit industry with a new technology that converts gases into a powder form. Professor Bhesh Bhandari and PhD student Mr Binh Ho, from UQ's School of Agriculture and Food Sciences, have developed a technology that will dramatically improve the safety, efficiency and effort involved in controlled ripening of fruit. Compressed ethylene gas* is used extensively to control ripen fruit such as bananas, mangoes, avocadoes, citrus and tomatoes that are picked at "commercial maturity", which is a hard green, but mature stage, before ripening has started. Professor Bhandari said the compressed ethylene gas, which is stored in cylinders, was highly volatile and explosive accidents have occurred in the past. "Compressed gas can be expensive, difficult to handle and unsafe," Professor Bhandari said. "To try to overcome these disadvantages, we have been looking at methods to encapsulate the gas in various types of solid materials to create a safe and convenient powder form." The research team has identified a starch derivative biological material, which has cavities in its crystalline structure that can encapsulate the ethylene gas. The ethylene gas is released from the complex powder when the temperature and humidity is raised. "We have developed a food grade, environmentally friendly biological powder that can release the ethylene gas very quickly in humid and high temperature conditions," Mr Ho said. "This would make handling the ethylene much easier and safer and allow for very small amounts to be used to ripen small batches of fruit. "It could also potentially be placed in trucks that transport the fruit from the farm so that the fruit arrives at the market perfectly ripe." Professor Bhandari presented his findings at the International Drying Symposium in China last week, where he was also presented with an international award in rec
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