Liquid purification or separation – Processes – Treatment by living organism
Patent
1993-07-01
1995-03-07
Wyse, Thomas
Liquid purification or separation
Processes
Treatment by living organism
210629, 210208, 210220, 210525, 210921, C02F 320
Patent
active
053955277
ABSTRACT:
A process for treating wastewater in a dynamic bio-sequenced manner in a single SBR reactor already filled with an activated sludge mixed liquor. In this process which is simple, fast and biologically and hydraulically "on going" and which allows one single SBR reactor to process typically twice as many batches of water per day as is presently processed within the existing SBR process, a given amount of wastewater rapidly introduced into the SBR reactor below the clear water level to cause the level of the wastewater within the tank to raise relatively uniformly and vertically and the supernatant clarified water to enter decantation pipes and be discharged out of the reactor. Then, the scum floating on top of the wastewater is collected and discharged and the mixed liquor is mixed and aerated as long as necessary to achieve the required treatment. The mixed liquor may further be stirred to bring the sludge totally in suspension within the liquor and a supplemental amount of wastewater added into the reactor to cause a corresponding amount of mixed liquor containing excess sludge to overflow. Then the sludge in suspension is allowed to settle for a period of time sufficient to avoid solids-to be carried out with the supernatant water when another given amount of wastewater is introduced into the reactor to repeat the above sequence of steps. Also disclosed is a dynamic clarifier for use to carry out this process.
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Wyse Thomas
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