Nutrient Removal Case Studies and White Papers

  1. Continuous Fill SBR Tanks Help WWTP Exceed Effluent Requirements, Generate Additional Revenue

    In order to meet the anticipated effluent criteria required by the Pennsylvania DEP, the Newville Borough Water & Sewer Authority determined that its existing wastewater treatment facility needed renovations. By installing two continuous fill SBR tanks, the facility lowered total nitrogen below permit limits, reduced energy costs, and created a new revenue stream (selling unused nutrient allocations). Read the case study for full details.

  2. DEMON Invades America: New Nutrient Removal Process Saves Money And The Environment

    Sustainable solutions can offer more than just environmental benefits. Green technologies can offer significant cost savings as well. Virginia utility Hampton Roads Sanitation District (HRSD) was looking for these when Chief of Special Projects, Charles Bott, approached World Water Works, a leading designer and manufacturer of wastewater treatment solutions, about the innovative and very environmentally friendly DEMON® deammonification system.

  3. Oxygen Removal From Feedwater In A Central District Heating System

    In central district heating systems, heated water from power plants is distributed to densely populated areas via insulated piping networks. High water quality is required to maintain the integrity of pipes, storage tanks, and other infrastructure in such systems. This case study explains how a Dutch power station achieved an O2 specification of <10 ppb for storage water tank filling by installing a chemical-free deoxygenation system.

  4. 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.

  5. 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

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.