Laserfiche WebLink
Equipment Maintenance <br /> See the individual equipment O&M manuals for proper operation, lubrication and <br /> maintenance required for pieces of equipment used on the flow equalization tank, pumps, <br /> blowers etc.. <br /> Blower Time Clock Operation <br /> During normal operation, it may not be required to run the continuously; time clocks that <br /> start the blower circuits several times a day are recommended. In the case of alternate <br /> use of two blower-motor units, two time clocks may be used rather than an alternator with <br /> one time clock, Time clocks with a day of the week wheel (for alternator operation) and <br /> those with 15-minute operating intervals throughout the 24-hour period (for on-off <br /> flexibility) are recommended. <br /> The use of a time clock is more economical than air bleed off and allows for <br /> adjustments to improve effluent. If the clarifier effluent quality is poor, a change in <br /> blower run time may be recommended instead of, or in conjunction with, a return sludge <br /> rate and/or wasting rate adjustment. At least seven days should be allowed for the <br /> mixed liquor to respond before any other changes are made; except when the plant <br /> goes septic. The aeration chamber of a tank receiving design flow should not be without <br /> air for more than 60 minutes and should maintain a D.O. of 2.0. Figure 1.1 gives a <br /> typical aeration cycle for a plant that serves a campground that is heavily loaded on <br /> weekends and lightly loaded on weekdays. Aeration cycles could vary during the day if <br /> most of the loading is received in a couple of relatively short periods of the day. <br /> Adjustments of the return sludge rate and of the aeration time are only two of many <br /> variables that could affect effluent quality. Good mixing is needed in the aeration <br /> chamber and the proper food/microorganism ratio, as controlled by sludge wasting, is <br /> important. With experience, an operator should be able to evaluate how each variable <br /> affects his plant and make the necessary corrections. <br /> Please see following chart for Timer Settings and Plant Loading graph. <br /> Aeration Timer Setting <br /> 6 PM-6 AM 6 AM-6 PM <br /> ON OFF ON OFF <br /> Sunday 30 30 45 15 <br /> Monday 30 30 45 15 <br /> Tuesday 30 30 45 15 <br /> Wednesday 30 30 45 15 <br /> Thursday 30 30 45 15 <br /> Friday 45 15 45 15 <br /> Saturday 45 15 45 15 <br /> p�srr,ar;�-Proc:ec{-pm�esscorcroii�;-f:q-I-i <br />