C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/30 (2006.01) C02F 1/32 (2006.01)
Patent
CA 2132897
A biological waste treatment assembly used between a septic tank and a drain field. There is an upper chamber containing a trickle media bed for aerobic treatment of the effluent, and a sump positioned beneath this. The fresh effluent from the septic tank drains into the sump, and is drawn from this and pumped upwardly through a conduit by a submersible pump. Compressed air is introduced at the base of the conduit so as to aerate the effluent. The conduit is formed of W-transparent tubing, and this is helically coiled around an ultraviolet light source which serves to destroy fecal colliform bacteria in the effluent. The effluent is then discharged via a spray nozzle onto the upper surface of the aerobic treatment bed, and migrates downwardly through this to a collection pan. A down tube drains the collected effluent directly to a relatively oxygen-free layer in the sump, where secondary anaerobic treatment serves to denitrify the products of the aerobic treatment in the upper chamber.
Gowling Lafleur Henderson Llp
Perry Clifford R.
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