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Better fat recovery
cst wastewater
Environmentally sustainable Induced Air Flotation from CST Wastewater Solutions opens new markets for recovery of high temperature fats and solids
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highly effective flotation cell that allows fats and solids recovery in high temperature applications has been developed by Australasian and Asia-Pacific waste water treatment specialist CST Wastewater Solutions Pty Ltd of Australia. The company’s new Induced Air Flotation (IAF) technology is a major advance on one of the world’s most preferred and simplest flotation technologies for industrial applications, Dissolved Air Flotation (DAF), says CST. DAF is a tried and trusted treatment of industrial wastewater effluents produced by food, beverage. and primary processing plants, but it has shortcomings when applied to demanding high temperature applications for which IAF is purpose-designed, including the treatment of high 46 | Meat Packing Journal | May~June 2017
temperature rendering waste in meat works and Clean in Place (CIP) wastewater in food factories. “Applications for which DAF is suitable are integral to the economies of many countries in Australasia, Asia, Africa, America, and Europe,” says Michael Bambridge, CST Wastewater Solutions managing director. However, in high temperature applications (ie wastewater above 80 deg C), DAF has a number of limitations, including: the solubility of air is very low, so very high recycle ratios are required; cavitation is a problem in recycle pumps; higher saturator pressure is required; and large cells are needed to accommodate increased recycle flow. CST Wastewater Solutions says that it has overcome these problems by introducing an energy efficient IAF high temperature cell to provide a different method of introducing pressurized air into the flotation process. www.meatpacking.info