Biogas reactor for anaerobic waste water treatment

摘要

In biogas reactors of the UASB type, the biogas is separated off from the rising wastewater stream by staggered collection hoods in which a free surface is maintained at which gas transfer takes place. In the known cross-sectional shapes of the collection hoods, the free surface area when the water level is high is greatly decreased and gas transfer is correspondingly greatly hindered. According to the invention, therefore, a rectangular profile having a constant free surface area is utilised. The upper side of the collection hoods can be designed in a roof shape as a sliding surface for the sedimenting anaerobic sludge.