CCP 11-28-1994 - Laserfiche WebLink

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';) j.) q ~ ,. " i\,','", " " . Jestroys harmful bacteria and other organisms years, we have reduced the number of plants in wastewater as it passes through a bank of from 33 to nine. MWCC's most recent closings UV lights, is more compatible \vith the aquatic included Anoka and Bayport. We also built environment and increases safety, since plant new pipelines [0 convey wastewater from these operators no longer are handling or storing sites to more efficient plants. MWCC shared potentially hazardous chemicals. some of the costs of these projects with the MWCC.S SEWAGE The Seneca rroject upgraded its solids cities in which they were budt by comHning COLLECTION SYSTEM SPREADS OUT OVER dewatering system, installing a state~of~the~art them with city projects in the same construc~ THE SEVEN.COUNTY centrifuge system that spins wastewater at high don areas-which also minimized disruption to METROPOLITAN AREA speeds to separate solids from liquids. This pro~ the public. LIKE THE VEINS AND ARTERIES IN YOUR duces much drier solids, reduces odors and low~ BODY. PLACED IN A ers incineration COSts. DECREAS I NG MWCC is also near- SINGLE LINE. THE MWCC also installed fine-bubble aeration SEWER ing completion of a 5S0~MILE SYSTEM systems at all its plants_ The aeration process is WOULD STRETCH . OVERFLOWS joint program to FROM THE TwiN critical to wastewater treatment, adding oxy~ reduce combined CITIES TO ST. LOUIS. gen to help natural microorganisms better sewer overflow. Most of the area's rain and MISSOURI. digest pollutants, Besides being more effective, snow~melt runoff is conveyed in separate pipes. rhe new fine-bubble system has reduced the But older pipes in Minneapolis. St. Paul and MWCC's electrical energy requirements by 30 South St. Paul carry both surface water nmoff percent. and sewage to our Metro Plant. If the runoff is MWCC also seeks to be more cost~effective tOO high-such as after a major rainstorm-the by closing inefficienr planrs. In rhe last 25 overflow is diverted into separate pipes which lead direcrly to rhe Mississippi. In 1984, engi- M wee rr~s personnel are critical to maintaining the neers eStimated that almost five billion gallons a;.;ency's nine plants and 5 50~mile inrercepror sewer system. of untreated sewage flowed into the river each year through combined sewer overflows. To solve the problem, with financial sup- port from the Legislaruref MWCC and the three cities embarked on a lO-year accelerated program to build new pipes for sewage ,vhile . keeping the old pipes for storm water only. After eighr years of construcrion. the project is nearly complete, resulting in an 80 percenr 9