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Lamb Westons AD reactor

ADI-BVF Anaerobic Reactor Cuts French Fry Plant’s Fuel Costs

Lamb Westons AD reactorADI Systems says its ADI-BVF anaerobic reactor for wastewater has allowed Lamb-Weston, a division of potato processing giant ConAgra, to recover biogas while minimizing electrical energy use and the amount of waste solids requiring disposal.

In a case study, ADI says this has saved the french fry processing plant money on fuel and waste disposal costs.

Lamb-Weston needed a wastewater treatment solution at its plant in Taber, Alberta, Canada. Its potato processing wastewaters are characterized by high concentrations of biodegradable chemical oxygen demand (COD); suspended solids; and fat, oil, and grease (FOG).

The ADI-BVF reactor screens potato waste solids and peels out of the waste stream inside the plant. It also removed silt in a separate mud clarifier.

The 56,750 m³ (15 MG) reactor is designed to treat a flow of 6,800 m³/d (1.8 mgd), a load of 56,000 kg/d (123,000 lb/d) COD, and 21,000 kg/d (46,000 lb/d) of suspended solids. It averages a COD removal rate of 85 percent.

The majority of the organic load is converted into biogas and conveyed to an18 MW dual-fuel plant process boiler that burns biogas and natural gas together.

In addition to using biogas to displace natural gas in its steam boiler, the stabilized anaerobic sludge is used to fertilize agricultural land.

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