Laserfiche WebLink
· \ comml lo <br /> <br />DATe t~arch 6, lg81 <br /> <br />TO:. <br /> <br />FROM: <br /> <br />SUBJECT: <br /> <br />John Harrington, Met. ropolitan Council <br />Environmental Planning ,anag~r <br />Fred Stenborg, IqWCC.Engineerlng Dept.~.(~ <br /> Anoka WWTP Capacity and Projected Flows <br /> <br />Anoka WWTP Capacity_ <br /> . .. · . · 2.46 1,1GD average <br />The total hydraulic capacity of the Anoka WWlP is GD. Un~L <br />annual flow. This allows for peak hourly flows up t-~.9.? <br />der these conditi6ns, the plant will no~t be able to meet the perm,[ <br />levels of 30 mg/1TSS and 25 mg/1BODs- <br /> Given the Condition that the Anoka ~TP must meet the 3D - 25 permit <br /> level on a monthly average basis, the effective capacity of the plant <br />' 2.3 MGD annual average floyd. Flows above 2.3 HGD and up to 2.46 <br />~D~require increased sludge hauling, additional aeration blow- · <br />er capacity and higher MLSS levels to insure compliance. However, all <br />these conditions are not possible because the aeration'capacity is <br />limited and a higher HLS~ further stresses the need for better oxygen <br />transfer.efficiency/capacity-' Therefore!.an average annual plan of <br />2.3 MGD ~s the Anoka T~TP l~miting capacity. <br /> ~ m <br /> Total Anoka ¥~TP projected flows indicate that by 1984 the flow will <br /> be 2.3~ HGD or above the limiting capacity. The flows' will increase <br /> to 2.45 MGD in 1985. Without fl.%J- Champlin flows, the plant will ex- <br /> ceed the secondary capacity (2.3) in 1987 at 2.37 MGD. If the Second <br /> Ramsey Connection and Andover Extensi6n ~re not built by 1987, the <br /> will reach capacity in 1988 at 2.31 MGD. Therefore, <br /> expansion or removal of N.W.~P m <br /> st occur by )98~. Should N.WZ ,no~P4¢ +h, Second Ramsey Connection <br /> m~st be phased-out or expanded by ,=o- · .... Extension and' <br /> and Andover Extension is built by 1987. If the Andover <br /> Ramsey Second Connection is not built by 1987, the plant must be <br /> phased-out or expanded by19~88. <br /> The attached ~a~le presents the projected flows which are based upon <br /> additional fl6w from Anoka and Ramsey from the Anoka Interceptor, and <br /> ~dditional Ch~mpli~ flow. 1975 - 1980 flows were used as a basis. <br /> FJS/bk <br /> Attachment - '"" <br /> <br />B.J. Harrington <br />J.D. Tomaselli/ <br />Jack Frost, <br />Jim Sipe, MW¢C <br /> <br /> <br />