Nutrient Removal in Cold Climate Lagoon Systems

Description:Nutrient removal in cold climate lagoon systems. Presenter: Merle Kroeker, P.Eng., Nelson Environmental Inc. Nutrient enrichment or eutrophication of waterways is one of the most serious water quality issues in North America. Waste water treatment plants (WWTP) are one of the main point sources contributing to excessive nutrients (nitrogen and phosphorous) in lakes and rivers. Historically the majority of wastewater treatment plants, particularly ponds or lagoons, were not designed to remove nutrients. The current trend in North America is to place ammonia restrictions on WWTP effluent, requiring an increasing number of facilities (including lagoons) to have some element of ammonia-N removal. Over the past 15+ years Nelson Environmental has developed the OPTAER lagoon based wastewater treatment process. Traditionally the process has been designed to remove BOD and TSS from municipal and industrial wastewater. With the push towards nutrient removal, Nelson Environmental has adapted the SAGR (Submerged Attached Growth Reactor) process for ammonia removal in cold climates. Lagoon Phosphorus removal is accomplished by chemical addition and filtration. While Phosphorus removal is an established process, ongoing development work continues to lower chemical dosing requirements and improve removal efficiencies when utilizing the process to upgrade lagoon systems. This presentation will discuss the technologies that are integral to the OPTAER lagoon based treatment process, focusing on the SAGR ammonia and total nitrogen removal system case studies.

Authors: Merle Kroeker

Subjects: Environment and Conservation, Wastewater, Watersheds

Tags:AC15,AC15 presentations,2015 BCWWA Annual Conference & Trade Show

Citation:Stream 1: Small Water Systems

Publication Date:May 29th, 2015 Upload Date:Jun 26th, 2015

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