Wastewater Treatment Case Studies and White Papers

  1. San Diego Experiences Benefits Beyond Contaminant Reduction

    Because inadequate screening was allowing hair, fiber and sand contaminants to work their way through its treatment process, The City of San Diego Public Utilities Department Wastewater Branch sought out sludge cleaning technology that they could integrate into their existing system.

  2. Rokeby Generating Station Saves 50% In Capital Expense By Using 3M™ Liqui-Cel™ EXF-14x28 Series Membrane Contactors To Remove CO₂ To Extend Mixed Bed Resin Life

    Lincoln Electric Systems (LES) recently commissioned a membrane decarbonation system using  3M™ Liqui-Cel™ EXF-14x28 Series Membrane Contactors to remove CO2 prior to their mixed bed deionizers.

  3. Concrete Manufacturing Operation Meets Permit Requirements With PH Control System

    In order to meet its discharge permit limits, a ready-mix concrete manufacturing operation needed to neutralize its high pH process water. Staff installed a control system that automatically detects a rise in pH and treats the water with a modular in-line carbon dioxide feed system. The operation can now recycle treated water for rinsing trucks, supply recycled water into the concrete batching operation, and safely discharge the water into the environment.

  4. Odor Control Program Cost Reduction Through Dosing And Monitoring Automation

    Henrico County, Virginia (The County) utilizes multiple chemical technologies in the sewage collection system in order to control hydrogen sulfide concentrations at key points within the system. The county has strict compliance limits for hydrogen sulfide and was facing growing costs, spending in excess of $1.8 million dollars in 2010.

  5. Oxelia™ Integrated Ozone-Enhanced Biofiltration Is Propelling Potable Reuse Projects Forward

    Water professionals are seeking innovative approaches to address water supply challenges associated with population growth, drought, and environmental protection.

  6. Sodium Hypochlorite: The Unsung Hero In Disinfection

    For the fortunate few in this world, many of us enjoy fresh cold water from our taps, crisp white linens in hotel rooms, and refreshing and safe water in swimming pools. It all seems very easy and straight forward with all the new technologies available in the industry to ensure safe and clean drinking water. A reliable and effective technology is always needed to ensure peace-of-mind for all water treatment processes. In many cases, it is the centuries old Sodium Hypochlorite (NaClO) chemical, or as known by every household – Bleach. By Angela Yeung, District Sales Manager, Grundfos

  7. Innovative Project In Virginia Changes Lens On Wastewater

    In September of 2016, Ted Henifin took the first sip of water purified at a pilot treatment plant developed by HRSD (Hampton Roads Sanitation District). Now, the innovative water treatment program known as SWIFT — Sustainable Water Initiative for Tomorrow — is changing the lens through which communities and government officials view wastewater, drinking water, aquifer replenishment, and even fighting sea level rise.

  8. Case Study: Prosonic S Provides Reliable Control Of Filtration For Raw Sewage Water

    In the inlet of the plant, the raw sewage water is filtered through 3 automated systems. The filtration systems are equipped with an endless mesh, which captures the solid materials. By Endress+Hauser, Inc.

  9. Pre-Engineered Lift Stations Deliver Fix For Aging Pumps At Private Sewer Utility

    Undersized original construction and gradual equipment deterioration led to recurring pump station failures and overflows for the Valley Rural Utilities Company’s wastewater collection system in Lawrenceville, Indiana.

  10. Safe, Energy Efficient Disinfection For 45 MGD Combined Sewer WWTP Improves Water Quality

    The Hudson River, in the Capital District of Albany, NY, is a popular recreational area for boating, swimming and fishing. Unfortunately combined sewer overflows following storm events and snow melt from sewer systems dating back to the 1800’s were causing increased fecal coliform counts which in turn resulted in health alerts and limited access to the river. After considering several alternatives, the Albany County Sewer District selected a Wedeco Duron 60i2-2.5X4, with high power Ecoray 600W lamps, for their disinfection system.