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.
10 Riverview Drive
Danbury, CT 06810
Contact: Walter Renz
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.
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.
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.
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.
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.
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, 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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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.