ABOUT PRAXAIR

Visit us at WEFTEC 2017 Booth 651

Praxair is a leading industrial gas provider serving a wide variety of industries. The majority of the industries we serve have a need for water treatment to keep daily operations running smoothly. We produce and deliver carbon dioxide and high purity oxygen as well as customized systems to help industrial plants and municipalities meet their wastewater management goals. We work directly with our customers to provide a process assessment and development of a treatment strategy that includes equipment design, expert installation and industrial gas supply. Praxair offers a wide range of applications that treat and reuse process water, all while maximizing treatment capacity, controlling VOC emissions, reducing sludge volumes, improving safety and delivering cost savings.

High purity oxygen used in aeration and aerobic digestion processes greatly enhances the level of dissolved oxygen in basins, ponds and treatment facilities. The partial or complete replacement of air using oxygen instead lowers the off gassing of odors and may reduce the amount of energy required. Higher DO levels promote efficient processing and create the ideal environment for aerobic bacterial activity.

Plant operators across many industry segments are also challenged to maintain control over pH levels to remain compliant with community and government regulation. Environmental regulations often stipulate that discharge from wastewater operations be in a controlled range just above neutral. The use and storage of mineral acids puts an undue burden on operations to store and handle safely. Unlike the self-buffering pH control offered in a carbon dioxide system, strong acids often result in overdosing and uncontrolled falls in pH requiring additional processing. These products and technology offerings all contribute to making our planet more productive.

Praxair, Inc., a Fortune 300 company with 2016 sales of $11 billion, is the largest industrial gases company in North and South America and one of the largest worldwide. The company produces, sells and distributes atmospheric, process and specialty gases, and high-performance surface coatings. Praxair products, services and technologies are making our planet more productive by bringing efficiency and environmental benefits to a wide variety of industries, including aerospace, chemicals, food and beverage, electronics, energy, healthcare, manufacturing, primary metals and many others. More information about Praxair is available at www.praxair.com.

PRODUCTS

UNOX™ Process Upgrade UNOX™ Process Upgrade

Praxair has had an extensive history of innovation in the wastewater treatment process. About 15% of all wastewater treatment in the United States occurs in UNOX™ type systems. Since their original construction, many facilities now require adherence to new regulations. Praxair can help you make the required changes to ensure that your facility is running in the most efficient way possible and in line with current standards. We provide a wide range of technologies for UNOX™ facilities. These include enhancements that can help you achieve reduced operating costs and improved reliability through the upgrade of oxygen generation and dissolution equipment.

I-SO™ In-Situ Oxygenation System I-SO™ In-Situ Oxygenation System

What’s the best way to fight odors in the wastewater industry? Add a little oxygen. Adding pure oxygen to your existing process can raise the level of dissolved oxygen enough to reduce or eliminate odors without further action. Even better, our systems help you manage peak demand and increase capacity while reducing Volatile Organic Compound (VOC) emissions.

High Purity Oxygen High Purity Oxygen

Used as an industrial gas, oxygen can supplement or even replace air in the aeration basin to maximize treating capacity, minimize VOC emissions, reduce odor and foam, and increase flexibility. It is also used as a feed gas to generate ozone for water disinfection.

Odor Control Odor Control

What’s the best way to fight odors in the wastewater industry? Add a little oxygen. Adding Praxair’s pure oxygen to your existing process can raise the level of dissolved oxygen enough to reduce odors without further action. Even better, the use of a Praxair oxygen acetates treatment system will lower costs and help you meet your environmental goals. Our systems help you manage peak demand and increase capacity while reducing Volatile Organic Compound (VOC) emissions.

Buffered pH Control Buffered pH Control

It’s no easy task to run your water treatment facility as efficiently as possible while still meeting capacity demands and environmental regulations. But, at Praxair we can help. We have extensive experience in using carbon dioxide to reduce pH in alkaline water for the water and wastewater industry. Replacing mineral acids with CO2 for pH reduction offers many benefits. By no longer buying or storing chemicals that can do more harm than good, you are making your site safer while also reducing costs. This improved process can help you manage peak demand and capacity increases, increase plant flexibility, and lessen your impact on the environment. And when you’re supplied by one of the world's largest carbon dioxide suppliers, you can explore this alternative with confidence.

Liquid Carbon Dioxide Liquid Carbon Dioxide

A safe alternative to mineral acids, carbon dioxide replaces chemicals used in pH reduction — lowering costs and improving plant safety and flexibility.

CONTACT INFORMATION

Praxair, Inc.

10 Riverview Drive

Danbury, CT 06810

UNITED STATES

Phone: 800.772.9247

Fax: 630.320.4508

Contact: Walter Renz

FEATURED ARTICLES

  • Praxair To Deliver Technical Presentation During WEFTEC
    Praxair To Deliver Technical Presentation During WEFTEC

    Praxair, Inc. announced recently that the company will be delivering a technical presentation and exhibiting in booth 651 at the 90th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2017.

  • Use Of Pure Oxygen To Resolve Capacity And Odor Problems
    Use Of Pure Oxygen To Resolve Capacity And Odor Problems

    The Escalon Industrial Waste Water Treatment Facility’s service area is seasonal and centered on tomato and pickle processing. The production season (roughly mid-July through mid-October) sees high hydraulic- and BOD loads that strain the facility’s capacity. During the high season highly variable BOD load depletes DO and causes permit violations and odor complaints. Praxair installed 4 X 15 HP Medium Velocity Oxygenation (MVO™ oxygenation system), with the ability to deliver up to 6 TPD of oxygen to supplement the existing aeration capacity at the facility.

  • 3 Reasons To Upgrade Your UNOX™ Wastewater Treatment System
    3 Reasons To Upgrade Your UNOX™ Wastewater Treatment System

    The UNOX system is a high purity oxygen biological system that is used to oxidize the biochemical oxygen demand (BOD) in the wastewater. The oxygen used in these systems is usually produced on site by a Pressure Swing Adsorption (PSA) system.

  • Three Wastewater Treatment Issues That Can Be Improved With High-Purity Oxygen
    Three Wastewater Treatment Issues That Can Be Improved With High-Purity Oxygen

    Wastewater facilities in various industries face challenges in day to day operations. Some of these treatment issues can be addressed by incorporating high-purity oxygen into the wastewater treatment process. Below are three common wastewater treatment issues and how oxygen may help.

  • The 3 Main Reasons To Use Carbon Dioxide For pH Control
    The 3 Main Reasons To Use Carbon Dioxide For pH Control

    Finding ways to improve everyday processes in more efficient and productive ways is an important goal for most companies. Many water and wastewater treatment facilities use sulfuric acid when pH reduction is needed, but face safety and process risks as a result. As an alternative to sulfuric acid, carbon dioxide (CO2) offers several benefits. 

  • Increasing Wastewater Treatment Capacity With Minimum Capital Expense
    Increasing Wastewater Treatment Capacity With Minimum Capital Expense

    Walter Renz, Director of Business Development for Praxair, highlights the use and benefits of oxygen and carbon dioxide in the water treatment and wastewater industries with specific focus on a low-cost, high-efficiency dissolution process in this video interview with Bill King.

  • Praxair Presents Wastewater Treatment Offerings At WEFTEC 2016

    Praxair, Inc. announced recently that the company will be delivering a technical presentation and exhibiting in booth 2801 at the 89th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2016.

  • Pure Oxygen Use In High Solids Applications
    Pure Oxygen Use In High Solids Applications

    The desire to treat an increased COD load in two existing 450 m3 biological tanks drove a pharmaceutical manufacturer to consider wastewater treatment using an MBR with pure oxygen.

  • Ozone Vent Gas For Aeration At Wastewater Plant Expansion In China
    Ozone Vent Gas For Aeration At Wastewater Plant Expansion In China

    The Jimo, China, municipal wastewater plant was originally designed to treat a combination of municipal and textile wastewater (120,000 m3/d) with Class IB effluent limits for BOD, COD, ESS, TN, NH3-N and TP.

  • CO<sub>2</sub> For pH Control And Re-Carbonation In Drinking Water Treatment
    CO2 For pH Control And Re-Carbonation In Drinking Water Treatment

    The City of Bloomington’s water purification plant has been operating since 1929. The lime-treated water has high pH which can cause scaling and can eventually clog the piping and filters in the plant. So, the plant needs to re-carbonate the water thereby lowering and stabilizing the pH. CO2 is an effective and safe chemical that offers treatment flexibility for a utility doing pH control.

  • Carbon Dioxide For pH Control Of Landfill Leachate
    Carbon Dioxide For pH Control Of Landfill Leachate

    A landfill operator’s leachate treatment plant in Missouri required pH reduction following lime-softening and prior to the biological wastewater treatment process. Carbon dioxide (CO2) was chosen as a substitute for sulfuric acid due to improved process control and a reduced tendency to form scale.

  • In-Situ Oxygenation System Enables Increase In Capacity For Municipal Wastewater Treatment Facility
    In-Situ Oxygenation System Enables Increase In Capacity For Municipal Wastewater Treatment Facility

    To increase capacity within the existing footprint of a wastewater treatment facility in Michigan, two existing tanks were converted to aeration tanks with pure-oxygen aeration provided by Praxair’s In-Situ Oxygenation (I-SOTM) System.

  • CO<sub>2</sub> For pH Control To Prevent Scaling In The BOF/BF Scrubber Water Circuit In Steel Mills
    CO2 For pH Control To Prevent Scaling In The BOF/BF Scrubber Water Circuit In Steel Mills

    The Blast Furnace (BF) is a critical process unit in the iron and steel industry, which converts iron ore into molten iron and is the beginning of the process in the manufacturing of steel. The Basic Oxygen Furnace (BOF) is a vessel that is used to reduce carbon in liquid iron from ~4%, down to 0.04%. The combustion of carbon in the BOF is enabled by blowing pure O2 into the melt.

  • 5 Approaches To Treating Wastewater In Petrochemical Production
    5 Approaches To Treating Wastewater In Petrochemical Production

    At Praxair, we are making our planet more productive. Whether it is by providing industrial gases that are used in the refining and processing of fossil fuels or technologies that allow facilities to reliably meet their wastewater treatment guidelines, Praxair is helping companies be more productive.

  • 5 Approaches to Treating Wastewater in Pulp & Paper (Industrial) Production
    5 Approaches to Treating Wastewater in Pulp & Paper (Industrial) Production

    Pulp and Paper manufacturing is water intensive, and as much as 40-60 m3 of water is utilized per air dried metric tonne of finished product.

  • 5 Approaches to Treating Wastewater in Beverage (Dairy) Production
    5 Approaches to Treating Wastewater in Beverage (Dairy) Production

    The dairy industry undertakes a number of activities that involve converting raw milk into milk, butter, cheese and yogurt using processes such as chilling, pasteurization, and homogenization

  • 5 Approaches to Treating Wastewater in Food (Meat) Production
    5 Approaches to Treating Wastewater in Food (Meat) Production

    The meat processing industry consists of two major groups - slaughterhouses and packinghouses. A slaughterhouse is a plant that harvests animals and whose main product is fresh meat as a whole or smaller meat cuts. A packinghouse is a plant that both slaughters and processes fresh meat to cured, smoked, canned and other prepared meat products.