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Alternative <br /> eatment Process Flow Chart Efficient Multi-Step Treatment <br /> Backwash Process. <br /> I <br /> Thr innuent wastewater enters the pack- <br /> tion Tank <br /> plant by passing through a comminutor <br /> fiat Tertiary Filter Disinfection and har screen for the gross solids removal. <br /> This step provides for the mechanical <br /> reduction or solids prior lda aeration. <br /> udge Once the wastewater has entered the aera- <br /> Discharge tion chamber the untmated now is mixed <br /> Sludge" Waste Activated Sludge with mi active binmmss in a rolling action <br /> HoldingTank which takes place the length and width of <br /> the chamber In a slow forward progression. <br /> — --- This rolling mixing action Is the resod of <br /> air originating from diffusers located along <br /> _— one side of the bottom of the tank.This <br /> insures that adequate mixing is maintalned <br /> CONTROL PANELinsures <br /> the tank.The chamhers are nlleted on <br /> each side and the Imltom to assure and <br /> enhanrr the rolling motion or the water <br /> BUIWEN MOTOR <br /> UNITSand eliminate any"dead zones"in the tank. <br /> This design feature also minimizes the <br /> accumulation of scum and frnth in Ute aer <br /> SCBM AIRLIFT ation tank.The oxygen transfer achieved <br /> *' PUMP with the diffused air passing through the <br /> - SLuncts AIRurr wastewater coupled with the rolling action <br /> Ir PUMP provbles a safncient oxygen supply to allow <br /> microorganisms to oxidize treatable wastes <br /> into earlmn dioxide,water and astable <br /> sludge. <br /> / After aeration.Uu:wastewater flows in lire <br /> clarifier which typically has a hopper hot- <br /> tom configuration.The clarinets are sheet <br /> to provide the required retention time <br /> based on an average Iwenty-Pour hour <br /> design flow.During the settling period <br /> solids settle on the bottom of the clarifier. <br /> Airlift pumps with adjustable pumping <br /> capabilities am used to return these solids, <br /> —r as activated sludge,to the aeration cluun- <br /> her to maintain the maximum ernrienry or <br /> the biological process.Mien necessary. <br /> excess sludge is wasted to an aerated <br /> /�. MIXING BAFFLES sludge digestion tank for additional treat <br /> nient and reduction.:\skimmer airlift <br /> pump is used to return floatable solids and <br /> scum to the aeration chamber for further <br /> DISINFECTION processing. <br /> CONTACT ZONE The treated water now.,front Clic clarifier <br /> to a disinfection chamber for treatment <br /> prior to discharge In complete the treat- <br /> ment process.Tertian filtration may also <br /> be used where a high quality eMuent is <br /> required. <br /> -- <br />