Passage9 Ko said the government has invested heavily on food testing and inspections.Heavier fines or the setting up of a tracing system to track gutter oil production will be considered,he said. Hong Kong company Globalway is under investigation after it is suspected of selling lard oil-made from pork fat but intended for animal feed or industrial use-to Taiwanese edible oil firm Chang Guann Chang Guann is believed to have blended the lard oil with "gutter oil"recycled from restaurants and leather processors. Steve Choi,executive director of Dynamic Progress International,one of three Hong Kong companies which recycle used oil-including lard oil-into bio-diesel,told RTHK this morning that the price of used oil had risen as much as fourfold in recent years. As no regulations govern the buying of used oil,Choi said he believed some unscrupulous buyers had reprocessed it and then sold it as edible oil. Government figures estimated that a total of 16,000 tonnes of used oil were produced in Hong Kong last year.Of this amount, 11,000 tonnes was recycled into bio-diesel. Passage 9 3 / 4 Ko said the government has invested heavily on food testing and inspections. Heavier fines or the setting up of a tracing system to track gutter oil production will be considered, he said. Hong Kong company Globalway is under investigation after it is suspected of selling lard oil -- made from pork fat but intended for animal feed or industrial use – to Taiwanese edible oil firm Chang Guann. Chang Guann is believed to have blended the lard oil with "gutter oil" recycled from restaurants and leather processors. Steve Choi, executive director of Dynamic Progress International, one of three Hong Kong companies which recycle used oil — including lard oil — into bio-diesel, told RTHK this morning that the price of used oil had risen as much as fourfold in recent years. As no regulations govern the buying of used oil, Choi said he believed some unscrupulous buyers had reprocessed it and then sold it as edible oil. Government figures estimated that a total of 16,000 tonnes of used oil were produced in Hong Kong last year. Of this amount, 11,000 tonnes was recycled into bio-diesel