CONTAMINANT REMOVAL RESOURCES

• What Is An Electrocoagulation ETP And Who Can Use This Treatment Technology?

  An Electrocoagulation ETP is an effluent treatment plant used for the treatment of water, wastewater, and process water. Electrochemical technology and in particular specialized electrocoagulation has become a sustainable water treatment technique due to its ability to remove multiple contaminants more efficiently and economically than conventional chemical treatment systems, such as colloidal silica, emulsified oils, total petroleum hydrocarbons, BOD, COD, refractory organics, trace heavy metals and suspended solids.

• What Is Sustainable Flocculation And What Are Sustainable Flocculants?

  In most standard drinking water and wastewater treatment systems, there is a flocculation process that is used to reduce the concentrations of solids within the effluent stream. This particular process makes use of substances that aid in the clumping together of suspended particles among other contaminants in a clarifier system.

• In 2022, Water Quality Gets The Attention It’s Due

  With the funding brought forth by the bipartisan infrastructure bill passed late last year, as well as aggressive policies and regulation to rid water supplies of per- and polyfluoroalkyl substances (PFAS) and lead, 2022 shapes up as the year we finally address our industry’s most troubling and challenging contamination issues in a meaningful way.

• How To Truly Eradicate PFAS From Our Drinking Water

  As so-called “forever chemicals” get more attention from regulators and the public at large, the pressure is on to eliminate these pervasive contaminants — forever.

• Activated Carbon Before PFAS: Getting Back To Taste And Odor

  While activated carbon has garnered a lot of attention for its efficacy in removing per- and polyfluoroalkyl (PFAS) compounds from drinking water, it had a history in water treatment long before PFAS entered the public consciousness. Water Online spoke with Eli Townsend, applications engineer at Calgon Carbon, to discuss some non-PFAS challenges — e.g., taste and odor — and how water treatment plants (WTPs) can use activated carbon to solve them.

• The Effects Of Water Quality On Arsenic Removal

  When considering an arsenic treatment option for a water system application, it’s important to obtain and review the proposed design criteria carefully. A good system design will have evaluated critical water quality parameters such as pH alongside arsenic, phosphate, silica, iron and manganese, vanadium, sulfide, and other heavy metal concentrations.

• Tackling Arsenic With A Cost-Effective Strategy

  Arsenic presents a wide array of negative health impacts, which is why it is such a big concern for many municipal water systems. The contaminant is linked to multiple types of cancer — including bladder, lungs, skin, kidney, and liver, among others — and is known to cause of variety of other problems such as skin issues and intestinal issues.

• Best Practices For PFAS Removal In Gravity Filters

  PFAS is a growing problem for municipal water utilities. The contaminant continues to show up in more water sources and regulations are a moving target that will likely involve more compounds and lower acceptable limits. As a result, crafting a long-term strategy to address PFAS can be problematic. However, those utilities using conventional gravity filters with anthracite as the filtering media have an opportunity to continue organic removal while adding PFAS removal with a simple conversion.

• How To Save Time, Save Money With Pilot-Plant Testing

  When developing water or wastewater treatment processes for entirely new applications or modifying existing processes to accommodate changing water characteristics or regulatory discharge requirements, understanding capital investment, operating cost, and long-term performance is critical. Here are several ways to view pilot-plant or lab-scale testing as viable approaches to better outcomes with lower risks.

• Advanced Treatment Systems Tackle Taste And Odor Issues

  There is no question that unpleasant taste and/or odor in drinking water can create negative water quality perception challenges for water utilities. Though taste and odor are not health concerns, consumers still are likely to notice and voice their concerns.