BIOLOGICAL ABSORBER OF WASTE WATER CONTAMINANTS Russian patent published in 1994 - IPC

FIELD: decontamination of waste water. SUBSTANCE: biological absorber to extract contaminants from waste water includes waster water feed pump, biofilter charge made in the form of rough plates fixedly positioned on supporting beams and spaced from one another, decontaminated water collecting reservoir, primary and secondary sedimentation tanks, aeration and illumination systems, pipes to supply waste water and discharge decontaminated water, pipe to return water for repeated decontamination, silt sediment and slime discharge system, and shutoff valves. Biological absorber is enclosed in rectangular housing whose upper portion is made in the form of steps and lower portion is U-shaped. Ratio between heights of end face transverse vertical walls of housing, in direction of waste water flow, is assumed as H : h = 2.0 to 3.0. Biofilter charge made in the form of edged plates made of redox material having developed open porous structure is securely positioned in supporting beams of housing upper and lower portions. Disposed in supporting beams of housing upper portion are odd rows of plates, whereas in supporting beams of housing lower portion are located even rows of plates to make up transverse compartments between themselves and housing transverse vertical walls. Decontaminated waste water collecting reservoir communicating with secondary sedimentation tank is securely positioned under last transverse compartment. Illumination system including luminescent lamps is located in housing upper portion. Aeration system may be of natural- or forced-aeration or combination type. EFFECT: provision of highly developed surface to overgrow with biofilm. 5 cl, 9 dwg