General nutrient guidelines are increasingly being implemented at facilities which have previously had no limits.  As plans for these new Biological Nutrient Removal (BNR) facilities are made, years of experience and lessons learned at numerous BNR facilities can be applied to deliver the best possible project for a given situation.  This webcast will cover practical planning and implementation considerations through several insightful case studies.  This broad base of case studies will highlight the range of opportunities and challenges associated with planning and implementing nutrient removal.  These case studies will be followed by a discussion of the best practices in BNR startup and management of unforeseen startup issues.

First, the need to identify site specific challenges and opportunities will be highlighted in Johnson County KS Middle Basin Plant.  Middle Basin acts as a regional biosolids handling facility where an increased sidestream nutrient load creates challenges for an already carbon limited plant.  The next case from St. Cloud MN shows the benefits of involving all stakeholders early in the planning phase and throughout design and construction, incorporating flexibility for future growth and nutrient limits, and reuse of existing assets over new infrastructure. Holistic planning allowed St. Cloud to reduce costs while meeting current and future nutrient limits, eliminating the need for major capital upgrades in the future.  The final case; the Cedar Creek Plant in Olathe KS, requires N and P removal and has an extreme limitation of the influent readily biodegradable COD required to drive BNR.  As the most recent to come online; this case study will highlight the latest BNR design features, as well as the innovative mixed liquor fermenter implemented to overcome the challenging carbon balance.