ANAEROBIC TREATMENT OF INDUSTRIAL WASTEWATER

World Intellectual Property Organization Patent

APP PUB NO WO-2013155631-A1
SERIAL NO

PCTCA2013050301

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Abstract

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Feed water is processed in an anaerobic digester. A solid-liquid separation device, for example a sludge screw thickener, treats a stream drawn from the digester in a recirculation loop. The solids portion is returned to the digester to increase the solids retention time and the TSS concentration in the digester. A liquid portion with less than 5% of the solids in the stream is removed and optionally treated further. The flow rate to the solid-liquid separation device is preferably greater than the influent flow rate. The solid-liquid separation device may receive digestate at a TSS concentration of 4% or more and return a solids portion having a TSS concentration of over 10%. The feed water is preferably one or more industrial waste streams having a COD concentration of 20,000 to 50,000 mg/L and a TSS concentration from 1-5%. The organic loading rate may be 10-12 kg/COD/m3/day.

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Patent Owner(s)

Patent OwnerAddress
ANAERGIA INCCABURLINGTON ON L7L 4X5

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Inventor(s)

Inventor Name Address
JOSSE JUAN CARLOS ALISO VIEJO CALIFORNIA 92656
THEODOULOU MICHAEL DAVID MILTON ONTARIO L9T 7M3

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