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11. Observe the flow over the edge of the effluent weir for uniform distribution. Adjust <br /> weir plate, if required <br /> 12. Check the quality of the effluent by visual inspection of the discharge from the <br /> plant. In a satisfactorily operating plant, the effluent should be free of objectionable <br /> odors and visible solids, other than a fine suspension of relatively non-oxidizable <br /> material. <br /> Periodic Operation and Maintenance <br /> As the operator gains experience with the Sewage Treatment Plant, they will establish <br /> their own routine of maintenance and operation. In a well-maintained plant, the daily <br /> amount of time required will be minimal. The following is a few of the recommended <br /> points to check to insure a continuous, efficient operating unit. <br /> 1. Check that blowers are operating property. If the unit has been supplied with a <br /> duplex blower installation, the blowers should be alternated regularly, if this has <br /> not already been accomplished through the time clock supplied. If a blower unit is <br /> to be used as a stand by blower, it should be operated for fifteen (15) minutes or <br /> longer each week. This will prevent the possibility of corrosion of the blower <br /> chamber by allowing the internal lubricant to be coat the blower internals. <br /> 2. Periodically remove and clean blower air intake filters. <br /> 3. Hose down walls, troughs, weirs, etc., of grease deposits or slime growths, which <br /> tends to form at the water line. <br /> 4. Any floating solids or grease accumulation should be skimmed off and disposed <br /> of. <br /> 5. Inspect plant for damage to protective coating and touch up before rusting creates <br /> a major problem. It is recommended, where possible, that approximately every <br /> two or three years that the tanks be drained and the entire structure be inspected <br /> for damage to the protective coating. Damaged areas should be thoroughly wire <br /> brushed and cleaned, prior to painting. <br /> 6. The volume of sludge developed in the aeration tank will increase from the date of <br /> start-up and level off when the plant is loaded at or near design flow. The sludge <br /> volume will maintain a constant level for a considerable period of operation. There <br /> will be a gradual accumulation of solids or sludge until good separation of solids <br /> from the liquid in the Final Tank is no longer possible and solids will be found in <br /> the clarifier effluent in objectionable quantities. When this occurs, wasting of <br /> sludge to the sludge holding tank is desirable. When it is time to waste sludge to <br /> the sludge holding tank, this can be accomplished by directing the return sludge to <br /> the holding tanks from the air lift pumps by means of valves provided in the <br /> discharge line. When wasting is required, it is best accomplished by removing a <br /> small amount at a time over a period of several days. <br /> pc�;i>&:m-,tanup-prelininan-i-b <br />