Patent ID: 6063273
Filing Date: 2000-05-16
Classification: C02F,Y02E,Y02W

Abstract:
Apparatus for the biological purification of waste water, comprising:a first part being an upflow anaerobic sludge blanket (UASB) reactor which has, at the bottom, a mixing section (4), at the top gas collection means (8) for collecting methane gas bubbles, and a fermentation section (6) which is present between the mixing section and gas collection means, which fermentation section is intended for biomass and the water to be purified,a second part being an aerobic reactor (2) mounted above the UASB-reactor (1), said aerobic reactor comprising means (14) for supplying air and/or oxygen, characterized bya third part being a buffer zone (13) for anaerobic sludge which has flowed upwards through the gas collection means, said buffer zone being confined at the top by a partition (12) provided with openings and at the lower side by said gas collection means (8), said means (14) for supplying air and/or oxygen being mounted above said buffer zone (13).