| abstract |
Sewage plant apparatus and an improved, activated sludge process. The sewage plant generally comprises an aerator into which sewage is fed and is vigorously circulated and aerated by compressed air and, a clarifier from which treated liquid is discharged through an effluent line fitted with a collar and scum baffle. Tubular conduits permit mixture flow from the aerator to the clarifier. Both a skimmer and a sludge return, through which flow is induced by compressed air, recycle mixture from the clarifier back to the aerator. The skimmer is equipped with cleaning, defoaming and flow circulation devices. The improved activated sludge process includes recycling at a daily rate of 2,000 to 5,000 percent based on the volume of the aerator. |