The efficiency of a bioconversion plant using organic food waste to feed insects that go on to nourish farm animals and fish is being dramatically improved with variable frequency drive (VFD) technology from Invertek Drives.
A specialist plant in Malaysia has been set up producing the larvae from the Black Tiger Fly. The flies feed on waste food made up of unused or undervalued organic waste before producing the larvae, which is used as protein in the rapidly expanding global aquaculture and agriculture industries.
The plant uses large numbers of ventilation fans to maintain an even environment for the flies to feed on the waste before laying the larvae.
Downtime and maintenance reduced
“The existing drives had been installed by the fan manufacturers and were not matching with the motor current of the fans, causing frequent tripping. This resulted in fluctuations in the facility’s environment, making production less efficient.
“As a result, the facility was unable to increase production. The resulting downtime and maintenance were also causing additional costs,” said Khairul Azhari, Manager of Invertek Drives Malaysia, a sales partner of Invertek Drives.
Invertek Drives Malaysia and DSC Engineering installed 58 Size 2 Optidrive E3 IP66 indoor VFDs. They were commissioned with 4kW output at 9.5 Amps to match the fans motor current.
“The Optidrive output current easily matched the fan motors, preventing the tripping and downtime. It also provided greater control of the fanspeed, ensuring improved efficiency and a reduction in energy costs,” added Mr Azhari.
IP66 enclosure ideal for harsh environment
The harsh environment of the facility, such as washdowns, waste products and the flies themselves meant the IP66 / NEMA 4X rated VFD enclosure was a perfect solution.
The Optistick Smart, which uses NFC and Bluetooth technology, was used with the Optitools Mobile app to commission and to duplicate parameters on the 105 drives.
“Using this technology made the commissioning task and time much easier and faster,” said Khairul.
The growing market for such animal and fish food protein will mean an increase in such facilities, relying on VFDs to control fans for ambient environments.
Around 1kg of eggs from the flies produces six metric tons of protein in 10 days that is used by fish farms, poultry and pig producers, among others. It’s estimated that 10 per cent of the protein market could come from insects by 2040.
More details about Invertek Drives Optidrive VFD range and technology can be found at www.invertekdrives.com.
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Owain Betts, Media and Communications
t: +44 (0)1938 558 253
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