2022-091 Council Resolution - Laserfiche WebLink

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WSB recently presented an abstract at the AWWA International Symposium on Biological Treatment in Austin,Texas. The St. Martin biological filtration plant designed by WSB is the first fully biological filtration plant in Minnesota. This plant successfully removes high concentrations of iron, manganese, and ammonia while saving the City chemical and operational costs. WSB owns and operates an advanced biological filtration pilot plant that was recently used to successfully pilot biological filtration for a central Minnesota community of about 8,000 people,and another community of about 13,000 people in southern Minnesota. In addition, we recently piloted biological filtration to remove high concentrations of nitrate for a Twin Cities community and achieved 100 percent removal of nitrate in their raw water. The Environmental Protection Agency(EPA)is currently preparing a chapter on biological filtration for an upcoming AWWA manual and will be using the results of these pilot studies in this manual because of the excellent results achieved. The filter run times achieved with biological filtration are sometimes over five times longer than the filter run times achieved at conventional water treatment plants which could save the city many millions of gallons of filter supply and backwash wastewater per year. We estimated that the City of Lino Lakes could potentially save approximately$1 million in chemical costs over the next 20 years if biological filtration is implemented for the Water Treatment Plant. SCOPE OF WORK, FINAL DESIGN SERVICES WSB will prepare final plans and specifications, administer the bid process,and administer the construction in accordance with the Project Understanding section of this proposal. A Proposal for Design,Bidding,and Construction Administration for a Water Treatment Plant for City of Lino Lakes Project Understanding&Approach 8