City Of Havre, Montana Successfully Utilizes Mechanical Tank Mixing To Prevent Ice Formation And Improve Water Quality

Located in north-central Montana, the City of Havre is located in a geography that sees summer temperatures over 100°F (38°C) and winter temperatures that can plunge as low as -40°F (-40°C) accompanied by sustained arctic winds of over 20 mph. These dramatic swings in temperature can wreak havoc on disinfectant levels in the summer by creating a “stratified” tank environment conducive to pathogen growth and allow for ice formation in the tank during the winter. Ice formation can lead to tank coating and appurtenance damage as large chunks of ice can suddenly drop from a higher tank elevation and create catastrophic tank damage. The City of Havre realized that adding simple mechanical mixing to their newly refurbished 3.5 MG West Water Tank would solve both the potential summer water quality and winter asset protection issues. Read the full case study to learn more. 

Orbal® System for Biological Nutrient Removal

Discover how a fast-growing community's new WWTP meets new tighter limits on ammonia, phosphorus, and nitrogen for future growth.

AquaDiamond Cloth Media Filters Achieve 0.1 mg/L Total Phosphorus Limit

With the current national emphasis on restoring the water quality of America’s urban waterways, the City of Brockton, Massachusetts, Advanced Water Reclamation Facility (AWRF) wanted to stay ahead of the regulatory cycle – in particular, phosphorus discharge limits set forth by the National Pollution Discharge Elimination System (NPDES) program of the United States Environmental Protection Agency (U.S. EPA). For this region of the country, the U.S. EPA has proposed total phosphorus (TP) discharge limits of 0.1 mg/L.

Preventing Sewer Overflow: The Role Of Accurate Flow Measurement

This article will explore how mag meters compare to common types of open pipe measurement technologies and how they can help minimize or prevent sewer system surcharging.

Meet Stringent Phosphorus Limits Under A Wide Range Of Conditions With The CoMag System

The Village of Waterbury Wastewater Treatment Plant (WWTP) is located on the Winooski River floodplain, which poses challenges from significant flooding during the spring runoff and storm seasons to strong algal blooms in late spring.

Implementation Of Solids Retention Time (SRT) Control In Wastewater Treatment

Solids Retention Time (SRT) is a critical activated sludge design and operating parameter. The selection of an SRT has many consequences related to process performance, sludge production, and oxygen requirements. By Dr. Robert Smith, Sarah Elger, and Scott Mleziva, YSI, a Xylem brand

Testing Better Paths To Contaminant Control

As a utility, it is tough enough to be notified that you need to remove a new contaminant of emerging concern (CEC). It’s even harder without having a complete picture of what is involved. 

Polymer Activation Equipment Upgrade Yields Consistent Polymer Savings Of Over 13%

In an effort to lower operational costs and extend the life of the dewatering centrifuge, operators in Springboro, OH, began to look at the polymer activation equipment in use at the plant. The Polyblend® M-Series emulsion polymer activation systems had been in steady operation for over 10 years. The equipment still performed reliably, but operators were interested in ways to achieve greater efficiency. They were aware of the new Polyblend® Magnum mix chamber, with its enhanced two-zone mixing energy.

Hydra-Stop Solutions Isolate Damaged Valve During Water Main Replacement

The Village of Covington, Ohio had an ambitious 90-day project to replace the water main, taps, sewer main, laterals, and storm sewer through the center of town. Unfortunately, on day one, an unknown water service line was snagged and the top half of an 8” valve blew off, causing water to shoot 10”–12” out of the street.

Protecting The Process: Pretreatment For Membrane Bioreactors

Toward the end of the 1980s, Professor Kazuo Yamamoto from Tokyo University gave a lecture to a skeptical crowd. His topic? Immersed hollow fiber membrane bioreactors. Since the day that first audience listened to the possibilities of MBRs, much work has been done to make membrane bioreactors a common step in the wastewater treatment process.  

Flow And Concentration Measurement For Automated Sludge Thickening

Learn how a wastewater treatment plant in eastern Switzerland relies on the targeted use of flocculants to prevent sludge washout. 

A Comparative Study Of On-Line And Laboratory TOC Analyzers For Analysis Of Municipal Wastewater

This application note presents comparative data obtained on influent and effluent wastewater samples using laboratory and on-line TOC analyzers employing the heated sodium persulfate oxidation technique in USEPA-approved methods 415.3 and SM 5310C.

Automatic Rinse Tank Controls

Proper rinsing is one of the most important steps in quality manufacturing or metal finishing. Plenty of low cost, good quality water for rinsing has been available in the past, so rinse water conservation has been largely ignored.

Application Note: Environmental Applications Of The Agilent 1290 Infinity UHPLC: The Evolution Of Chromatography This application note presents examples of the use of UHPLC (ultrahigh performance liquid chromatography) for environmental applications using the new Agilent 1290 Infinity LC. By E. Michael Thurman and Imma Ferrer Center for Environmental Mass Spectrometry Department of Environmental Engineering University of Colorado Boulder, CO, USA

Simultaneous Measurement Of Flow And Electrical Conductivity

Explore how additional costs for analytical conductivity measurement can be eliminated. 

Veterinary Drug Residue Analysis Using The AutoMate-Q40: An Automated Solution To QuEChERS

QuEChERS is a Quick-Easy-Cheap-Effective-Rugged-Safe extraction method that has been developed for the determination of pesticide residues in agricultural commodities.

Biogas Measurement From Wastewater To Power Plant

Stockholm water company produces biogas from their wastewater facility which feeds Scandinavian Biogas for energy production. As they need to accurately meter what they sell to the energy facility they used a project contractor firm to engineer and define the best solution for the project.

Achieving A Delicate Balance To Maintain RO Membranes

This application note explores the importance of maintaining a delicate balance in reverse osmosis systems to protect RO membranes.

Combining Decentralized And Centralized Wastewater Treatment Strategies To Solve Community Challenges

To sustain the environment and smart community growth while protecting public health, engineers, municipal health officials, and regulators need innovative wastewater treatment solutions. The latest evolution of decentralized systems can efficiently handle residential and commercial daily flows and are a cost-effective alternative to the large, centralized wastewater treatment plants of the past. 

NEOSEP® Membrane Bioreactor System Simplifies 'Fundamental Necessities' Of MBR

The NEOSEP® MBR system features Kruger’s uniquely designed K-120C and K-240C flat sheet membrane modules.  The modules offer several innovative design features that enhance ease of installation, operation and maintenance.  This includes an integrated central lifting eye, offering an incredibly well balanced module that makes installation and retrieval a simple and stress-free process.