Nutrient Removal Case Studies and White Papers

  1. Sewer Authority Ends Plant Bypasses And Introduces Nutrient Removal With New Treatment Process

    The original contact stabilization activated sludge process at the Portage Area Sewer Authority generated hydraulic limitations that required repeated bypasses during heavy rainfall. Find out how the treatment plant upgraded its secondary treatment aeration system to include nutrient removal through a nitrification/denitrification/phosphorus process and has successfully processed I&I induced surges that reached a 10-MGD peak.

  2. Wastewater Pond Uses Floating Wetlands For Nutrient Removal

    A series of artificial floating wetlands, each planted with 70 individual plant plugs, is introduced to a Louisiana correctional facility's oxidation pond to remove nutrients causing discharge compliance issues. The wetland treatment technology is designed around the same principles as a naturally occurring wetland, however by expanding the available underwater surface area, it encourages greater microbial growth spurring on enhanced nutrient removal. By Nicole Waguespack, Martin Ecosystems

  3. Dissolved Air Flotation Pretreatment Washes Away Waco’s Foul T&O Problem

    During the hot and dusty summers just a few years ago, many thirsty residents of Waco, TX, were reluctant to slake their thirst with the city’s water.

  4. Big Steps In Plant Upgrade By Howard County Maryland Set The Pace For Restoring Chesapeake Bay Ecosystem

    A $92-million expansion completed earlier this year (2012) at the Little Patuxent Water Reclamation Plant (LPWRP) in Savage, MD, presents a model integration of bellwether aeration, disinfection and enhanced nutrient removal (ENR) systems added in tandem with other infrastructure upgrades, that have significantly improved the plant’s effluent and reduced harmful nutrients from reaching Chesapeake Bay.

  5. Modeling BMP's In Sensitive Areas With XPSWMM

    The clarity of Lake Tahoe has been declining since the mid-1960s because of the deposition of fine particles and nutrients from urban runoff. A program to control the quality of runoff entering the Lake employs the xpswmm comprehensive software package to simulate a detailed system of pipes and channels with surface and subsurface flow. Learn how the model has worked well as the initial planning-level model and eventual design model.

  6. Aquapoint’s AquaCell And Hallett® H-30’s Perfect Partners On Zooland Project

    Zooland is a resort/campground site in the Asheboro, NC, area. They have a relatively high-strength waste stream and are permitted for a surface discharge, therefore they must achieve very high effluent standards. One way or another, there was an obvious need for wastewater treatment. Cost was an issue, because private clients (especially) don’t want to spend money on wastewater.

  7. Salisbury Retrofits Existing Process With An AquaPASS® System To Comply With The Chesapeake Bay Initiative

    The Salisbury Township WWTP in Gap, PA utilized a conventional activated sludge (CAS) system prior to being retrofi tted with an AquaPASS Phased Activated Sludge System in May 2008.

  8. Meet (Or Beat) EPA Nitrate MCLs With An AdEdge Packaged Nitrate Removal System

    When a food processing plant in Lancaster County, PA was forced to supply bottled water to its employees due to high nitrate levels in its raw water, they had no choice but to investigate a nitrate removal solution. In this case study you’ll learn how the plant avoided EPA violations by reducing nitrate contamination levels to below 8 mg/L and simplified continuous monitoring by implementing a new packaged nitrate removal system from AdEdge.

  9. City Of Buffalo Gap, South Dakota Case Study

    Uranium removal pilot study was conducted for the City of Buffalo Gap, South Dakota at their Well No. 1 treatment facility.

  10. Z-88® Radium Treatment Process - City Of Bridgeton, New Jersey

    This radium removal pilot study was conducted for the City of Bridgeton, New Jersey’s Well No. 19 treatment facility. The Bridgeton water system contains concentrations of radium and gross alpha in excess of the Maximum Contaminant Levels (MCL).