FEATURED ARTICLES

• Peristaltic Pumps, Diaphragm Pumps, Or Neither? The Basics Of Chemical Feed Solutions

  Chemical dosing plays a pivotal role in water and wastewater treatment operations, so selecting the optimal feed system is critical to achieving quality goals and meeting permit requirements. With multiple technologies available, it is important to understand the benefits and downsides of each.

• Tighter Controls Promote Chlorine Dioxide Savings

  Chemical dosing for disinfection in the drinking water treatment process can be an expensive and tedious task. Many municipalities struggle to keep down the cost of chemicals, power, and maintenance while devoting an extensive amount of labor to making hourly checks. However, there is an alternative that is both effective and economical.

• Better Chlorine Control In A Cost-Effective Solution For Small Wastewater Plants

  Wastewater plants treat effluent with chlorine as a final disinfection measure prior to its discharge into the environment. While this should be straightforward, there are still a significant number of small water systems facing big problems because they don’t have a solid grasp on the process. The good news is that a modern, cost-effective solution is available.

• Change To 3-Precursor Vacuum Generator-Feeder For ClO2 In WTP, From Batch Generator Pumping, Cuts Chemical Costs, Gains Plant Management Of Equipment

  The water treatment plants (WTP’s) manager for the city of Midlothian, TX reports significant reduction in chemical costs, gaining new management control for their generation and feed equipment, and ending a pesky maintenance burden, by switching to three-precursor vacuum generator-feed, from batch-generator-pumping, for introducing chlorine dioxide (ClO₂) into their 8 MGD plant #2. As a result, he plans to make the same change at their 12 MGD plant #1.

• A Model For Vacuum Feed Monitoring

  Chemicals are among the greatest allies that drinking water and wastewater treatment operations have in the fight against contaminants. But these operations are dependent on the proper technology to administer just the right amount of chemicals at just the right time, ensuring that effluent is neither under- nor overdosed.

• Actuating Chlorine And Sulfur Dioxide Safety

  Drinking water and wastewater treatment operators are in a hazardous line of work. Beyond the large, complicated machinery they rely on, the use of chlorine and sulfur dioxide is a regular part of operations, two chemicals that can prove dangerous if not handled properly.

• Making Sense Of The Chemical Feed Frenzy

  The use of chemicals to treat water supplies can be traced back to the 19th century when English physician John Snow chlorinated a British water supply to stop the spread of cholera.

• Special Gas Chlorination System Replaces Tablet System At WWTP, Providing Enhanced Safety Needed For Gas Option, While Cutting Chemical Costs

  The district manager for the Pinetop-Lakeside Sanitary District (AZ) reports that a special gas chlorination system, featuring unique components and controls, and manufacturer-supplied service, has effectively replaced a chlorine tablet system.

• Vacuum Dosing Chemical Feeder For Chlorination And Dechlorination Helps Minimize O&M Costs For City Of Nashua, NH CSO Screening And Disinfection Facility

  As part of its Long Term Control Plan to reduce combined sewer overflows (CSOs) to the Merrimack River, the City of Nashua, NH constructed a new Screening and Disinfection facility (SDF) to reduce untreated discharges of CSOs to the Merrimack River.

• City Solves Reliability And Maintenance Problems For WTP Hypo Feeds

  A municipal water quality manager reports replacement of sodium hypochlorite (hypo) vacuum feeder units with a more advanced type at one water treatment plant (WTP) has helped allow for continued reliability for chlorination.

• City Improves Reliability For Chlorine Residual Compliance, And Cuts Chemical Costs, Through Replacement Of Pump With Special Vacuum Feeder For Bleach, LAS, And Polyphosphate

  The public works director responsible for a southwestern U.S. city’s drinking water supply reports multiple benefits from replacement of a problematic peristaltic pump system with a special liquid vacuum feeder system for bleach, liquid ammonium sulfate (LAS), and polyphosphate feeds at one of its well sites.

• Replacement Vacuum Feeders For Hypo Treatment End Heavy Feeder Maintenance Burden At WWTP

  The instrumentation supervisor for the City of Baltimore, MD’s 150-MGD Back River wastewater treatment plant (WWTP) reports that replacement of problematic vacuum feeders with more advanced vacuum feed units has ended heavy maintenance burdens associated with sodium hypochlorite (hypo) treatment of plant effluent. By Cliff Lebowitz

• WEF Names JCS Industries Winner Of 2012 Innovative Technology Award

  The Water Environment Federation (WEF) has named JCS Industries, Inc. of Spring, TX as a winner of one of its three Innovative Technology Awards for 2012, in recognition of the company’s patented Model 4100 Liquid Vacuum Feeder.

• City Proves Special, Vacuum-Driven Polymer Dosing Unit In WTP As Reliable Replacement For Problematic, Pump-Driven Type

  Operations management for a municipal water treatment plant (WTP) reports reliable replacement of a problematic, pump-driven polymer dosing unit in its solids contact clarification system with a special, vacuum-driven dosing unit. By Cliff Lebowitz

• Replacement Of Gas Chlorination System: City Takes Advantage Of Special NaOCl Dosing Unit

  Operations management for a municipal direct water filtration plant reports achievement of a reliable and cost-effective change in chlorination systems that has continued to provide for effective disinfection, while better meeting safety and efficiency criteria. By Cliff Lebowitz