Patent ID: 7279092
Filing Date: 2007-10-09
Classification: C02F

Abstract:
1. An improved apparatus for UV wastewater purification in septic tank system having a septic tank and a drainfield, the apparatus being adapted for placement underground between a septic tank outflow pipe end of a septic tank and a drainfield, the apparatus comprising: a) an assembly of continuous polyvinyl chloride (PVC) piping, of no more than 4 inches internal diameter in the area of active treatment, comprised of an inflow section which includes a straight septic tank outflow pipe, a 90 degree elbow attached thereto, a 24 inch long straight pipe attached thereto and extending downward vertically to communicate with a means to reverse direction 180 degrees, and a vertical treatment chamber comprised of a 24 inch long straight pipe attached thereto and extending upward vertically to communicate with a 4 inch diameter PVC ‘T’ fitting, so located so that the outflow arm of the PVC ‘T’ fitting and outflow pipe at their bottom is no more than one inch below the top of the wastewater flowing out of the septic tank outflow pipe, with the top leg of the ‘T’ communicating through a 3¾ inch long PVC straight pipe to a 6 inch to 4 inch diameter PVC reducer to a 30 inch long 6 inch diameter PVC straight pipe which extends to above ground level and is removably fitted with a 6 inch waterproof PVC cap; b) an ultraviolet (UV) lamp means emitting ozone free ultraviolet radiation in a wavelength range having a bactericidal effect, including a power means, a means to monitor, and a means to control the ultraviolet lamp and septic tank system operation; c) a means to prevent inadvertent exposure of personnel maintaining the apparatus from exposure to UV radiation with resultant risk of blindness; d) a bottom insert, having a plurality of ports there through, fixedly installed in the assembly of continuous polyvinyl chloride (PVC) piping, just downstream from the means to reverse direction 180 degrees, to prevent passage of particulate from the outflow of the septic tank from entering the area of the UV lamp means and act as a flow restrictor thereto; e. a top insert, having a UV socket port there through, fixedly installed in the assembly of continuous polyvinyl chloride (PVC) piping at the point of mating of the 3¾ inch long PVC straight pipe to the 6 inch to 4 inch diameter PVC reducer to a 30 inch long 6 inch diameter PVC straight pipe which extends to above ground level and removably fitted with a 6 inch waterproof PVC cap, from which the UV lamp means extends downward, and f. a means for monitoring the illumination of the UV lamp means remotely and for controlling the operation of the UV lamp means and septic tank system.