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corrosion control system Applications

  • Force Main Systems Sulfide Odor Control with Hydrogen Peroxide

    Force main systems are typically high sulfide odor generators due to septicity conditions related to full pipe flow and a greater anaerobic slime layer (biofilm) thickness. Primary factors that influence sulfide loading generation in a force main include sewage temperature, BOD, retention time, pipe size and flow. Gaseous hydrogen sulfide (H2S) release at the force main discharge is usually the main concern related to odor and corrosion control needs; however, corrosion problems within the pipe can be of a concern (e.g. "crown cutting") at locations where air pockets can lead to concentrated H2S gas build up. Some basic considerations for assessing an appropriate sulfide odor treatment method for force main systems include: Retention time / duration of control Pump station type / cycling (e.g. vfd; start/stop, etc). Force main injection tap points, if any (e.g. air relief valves) Existence of intermediate re-lift stations or in series pump stations Manifold force main systems

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

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    Air Pollution Control Solution for the HCl, HF, and Halides

    The severity of these contaminants requires the most advanced removal and treatment technologies. Macrotek has extensive experience in designing systems that will meet and exceed customers` requirements and regulations. In addition, the corrosive nature of these gases requires specific consideration for material selection.

    By Macrotek Inc. based in Markham, ONTARIO (CANADA).

  • Gravity Main Sulfide Odor Control with Hydrogen Peroxide

    Gravity main sewer systems include major trunk lines and the tributaries that feed them. Hydrogen sulfide (H2S) odor builds up in the collections system as the flows collect from upstream reaches and become larger, deeper and more septic (oxygen depleted) in the downstream reaches more near to the wastewater treatment plant. In general, most of the more significant hydrogen sulfide odor and corrosion control problems occur in the major trunk systems segments conveying flow to the plant. Therefore, selection of sulfide treatment for gravity systems has several options depending mainly on: Duration of control required Degree of septicity (oxygen depletion) Location of target control points or "hot spots" Location of available dosing points upstream of "hot spots" Availability of civil infrastructure and utilities Sensitivity to hazardous chemicals

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

  • Oxygen Generating Systems for Sewage Treatment

    Using Oxygen to Solve Waste Water Problems Lack of oxygen can cause inadequate purification or even anaerobic decomposition, as well as offensive odors. Injecting oxygen into sludge beds &/or piping allows you to: * Reduce nitrogen levels * Meet peak O2 demands * Have a back up to your aeration system * Pre-purify waste water * Control odors * Deter corrosion damage * Meet increased requirements regarding waste water purification

    By Oxygen Generating Systems Intl. (OGSI) based in North Tonawanda, NEW YORK (USA).

  • Microbial testing in cooling water system industry

    Superior reliability for superior control! Biocide treatments are essential to control microbiological growth in cooling systems. If not properly managed, the warm environments of cooling systems are ideal for the growth of microorganisms. As microorganism communities grow in cooling systems, they can attach to pipe walls and form biofilms. These biofilms pose serious risks, from human health risks like Legionnaire`s disease to reduced operating efficiency and eventually to equipment failure via microbiologically influenced corrosion (MIC).

    By LuminUltra Technologies Ltd. based in Fredericton, NEW BRUNSWICK (CANADA).

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    Ethanol and Biofuels

    Controlling the VOCs and CO emissions produced in the feed dryers (wet and dry milling), coupled with the particulate matter being introduced and the need for the reduction of NOx are just the start of having a successful abatement solution. The challenges of smooth pressure control that reduces dryer fluctuations and plug resistant media that lessen the frequency of bake-outs are also part of a successful abatement system and we have the solutions. Our engineered oxidation systems provide reliable performance with minimal maintenance requirements. Externally accessible valve bearings and other critical components are kept out of the corrosive moisture-laden streams extending the life of the equipment and facilitate maintenance intervals. Our simple oxidizer designs control your emissions with minimal facility intervention and allow us to provide you with reliable and dependable equipment.

    By Babcock & Wilcox MEGTEC based in De Pere, WISCONSIN (USA).

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    Continuous emissions monitoring for chemical industry

    Process control and emissions monitoring in a chemical plant is a challenge due to corrosive gases, high dust load, and high temperatures. To use an extractive system in this environment will demand a lot of maintenance.

    By Opsis AB based in Furulund, SWEDEN.

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    Continuous emissions monitoring for cement industry

    Process control and emissions monitoring in cement plants, can be a challenge due to the dusty and corrosive environment. OPSIS provides an accurate system that will operate with high performance and a minimum of maintenance.

    By Opsis AB based in Furulund, SWEDEN.

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    Waste water treatment plants Personnel Safety & H2S filter management

    Context & Challenges Globally, the wastewater treatment is the first public health issue. Urban development leads to urbanization near waste water treatment plant and extension of sewerage network. These aspects induce to an augmentation of sulfur compounds (H2S, mercaptans and sulfides) which are very corrosive, odorant and toxic. To monitor this compounds online CHROMATOTEC® offers high meteorological solutions. As a result of the confinement of the waste water stations, toxic components such as H2S and Methylmercaptan increased. Safety of employees on such working sites has therefore become of major problem. To fight this hazardous pollution, air filtering systems have been installed. For the station managers, personal safety coupled with the need for constant air quality control and filter change has been a heavy task.

    By Chromatotec Group based in Val de Virvée, FRANCE.

  • Sulfide Oxidation with Hydrogen Peroxide (H2O2)

    Sulfide Odor Control Sulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide found in nature was produced biologically (under anaerobic conditions) and occurs as free hydrogen sulfide (H2S) - characterized by its rotten egg odor. We are most likely to encounter biogenic H2S in sour groundwaters, swamps and marshes, natural gas deposits, and sewage collection/treatment systems. Manmade sources of H2S typically occur as a result of natural materials containing sulfur (e.g., coal, gas and oil) being refined into industrial products. For a variety of reasons - aesthetics (odor control), health (toxicity), ecological (oxygen depletion in receiving waters), and economic (corrosion of equipment and infrastructure) - sulfide laden wastewaters must be handled carefully and remediated before they can be released to the environment. Typical discharge limits for sulfide are < 1 mg/L. Sulfide Treatment Alternatives There are dozens of alternatives for treating sulfide laden waters, ranging from simple air stripping (for the low levels present in groundwaters) to elaborate sulfur recovery plants (used to treat several tons per day at refineries and coal burning power plants). There are processes based on biology (using compost filters, scrubbing media, or inhibition/disinfection), chemistry (oxidation, precipitation, absorption, and combination), and physics (adsorption, volatilization, and incineration). Each process occupies a niche which is often defined by the scale and continuity of treatment, whether the sulfide is in solution or is a gas, the concentration of sulfide involved, and the disposition of the sulfide containing medium. However, for reasons relating to convenience and flexibility, chemical oxidation (using hydrogen peroxide) continues to grow in its scope of application. Treatment with Hydrogen Peroxide While other peroxygens such as permonosulfuric (Caro’s) acid, peracetic acid, and persulfates will oxidize sulfide, their use for this application is overkill. Hydrogen peroxide (H2O2) is considerably simpler and more cost-effective. H2O2 may control sulfides in two ways, depending on the application: Prevention - by providing dissolved oxygen which inhibits the septic conditions which lead to biological sulfide formation; and Destruction - by oxidizing sulfide to elemental sulfur or sulfate ion.

    By USP Technologies based in Atlanta, GEORGIA (US) (USA).

  • REPLACING WATER SOFTENER WITH GREEN SCALEWATCHER WATER CONDITIONER

    Roper’s Restaurant, a cowboy themed restaurant in Albuquerque, New Mexico has replaced its water softener with the computerized, electronic, water-conditioner Scalewatcher from Scalewatcher North America. By installing Scalewatcher, the restaurant has avoided paying the $500 quoted for replacement media for its old water softener and also saved hundreds of dollars a year in salt and water thereby providing Roper’s with a short-term payback on the unit. Roper’s Restaurant, part of Outwest Eateries LLC dba, is located in a hard water area. This necessitated Bryce Chant, owner of Roper’s Restaurant using a water softener to prevent scale formation in the kitchen. “When I was given the price to repair our old water softener, I decided to install the Scalewatcher from Advance Plumbing”, said Bryce Chant of Roper’s Restaurant. We have had great success with it. Even though we had a water softener we still had hard water scale and a white ‘film’ in the dishwasher. Now with Scalewatcher that scale and ‘film’ has disappeared.” The average restaurant consumes 5,800 gallons of water daily, with 50% being used in the kitchen. If not properly treated, hard water can drain a restaurant’s bottom line due to the early renewal of capital equipment such as water heaters, boilers, coffee makers, dishwashers, steamers and other water-fed equipment. Hard water contains calcium carbonate that adheres to heating elements and the internal surfaces causing scale buildup that impairs efficiency. The limescale that deposits on the heating element will, if untreated, reduces efficiency, induces corrosion of the element and ultimately lead to appliance failure. In addition in restaurants, hard water also necessitates the use of additional detergents. In fact, for every additional grain of hard water, detergent use increases by between 2% and 4% per 1,000 gallons of water used. Many restaurants, like Roper’s use a water softener to reduce limescale. However, water softeners use copious amounts of both water and salt, which are expensive to buy and salt is also bulky to store. In addition, in many States now, including Southern California, municipalities and water departments are severely limiting, and in some cases prohibiting, the use of salt-regenerating water softeners due to concern regarding the increased levels of salt in ground water. The award-winning Scalewatcher system not only helps restaurants meet these regulations by minimizing salt usage but also saves money on salt purchase and has the additional benefit of removing scale from water-fed equipment. The environmentally friendly Scalewatcher provides a permanent solution to hard water problems without the need of chemicals, salt or maintenance. It works by producing a varying electronically applied force field, induced by a coil wrapped around the outside of the pipework, which keeps the minerals in suspension and thus prevents limescale forming. The water’s increased solubility enables it to dissolve existing scale, which is gradually washed away. “We are saving money each month because we do not have to purchase salt for the water softener and we are not dumping salt filled water down the drain because there is no brine process with Scalewatcher”, said Bryce Chant. “Living in New Mexico with our drought situation, I hated knowing all that water was being wasted. Scalewatcher is a truly ‘green’ technology that we are happy we have implemented”. Roper’s Restaurant has been so impressed with the Scalewatcher technology that the managers have bought units for their homes and have recommended it to family and friends. Scalewatcher models are based on continuous research and over 20 years experience and expertise as market leaders in electronic scale control with countless units sold worldwide. The patented Scalewatcher systems start at $248.00 USD and are capable of treating pipe sizes from one to 120 inches. All Scalewatcher systems come with a full performance guarantee and include free shipping throughout North America.

    By Scalewatcher North America Inc. based in Oxford, PENNSYLVANIA (USA).

  • DOCUPAK LLC REDUCES COOLING TOWER CHEMICAL USAGE BY A THIRD

    Docupak LLC, a full service marketing company headquartered in Alabaster, Alabama, has reduced chemical usage by a third and removed all scale from its cooling tower at its plant after installing the patented, award-winning Scalewatcher computerized, electronic water-conditioner from Scalewatcher North America. In addition there are no longer signs of algae growth on the cooling tower louvres. Founded in 1998, Docupak, the operating name of Document and Packaging Brokers Inc., develops and distributes materials for businesses nationwide. In addition to its headquarters in Alabaster, Alabama, the company also operates a further plant in Alexandria, VA and has sales offices in Atlanta, Chicago, Cincinnati, Dallas, Los Angeles, Tampa and Washington, D.C. Aware that health agencies continually draw attention to the risks of limescale and algae in cooling towers and wanting to reduce the use of chemicals in the cooling tower, Plant Manager, Anthony Kinstley decided to install the Scalewatcher electornic water-conditioner through local dealer, Al Chatham of Water Processing and Well Supply in Harpersville, Alabama. An industrial Scalewatcher was installed on to the water-feed line to the building and then a further unit was specifically fitted on to the recirculation line of the cooling tower. “Since using the system the scaling on our cooling tower has been eliminated and we currently use only a third of the original chemicals intended for the water treatment within our system”, said Anthony Kinstley. Many air conditioning and refrigeration plant systems are water-cooled. The heat generated by cooling coils is removed by water, which is passed through a water-cooling tower. These are recirculating systems, which operate at temperatures ideal for bacterial and algae growth, and have plentiful supplies of nutrients. In cooling towers, temperature, water hardness, pH, scale and corrosion are all factors, which increase the chance of biofilms, algae and Legionella colonization. The environmentally friendly Scalewatcher provides a permanent solution to hard water problems without the need of chemicals, salt or maintenance. It works by producing a varying electronically applied force field, induced by a coil wrapped around the outside of the pipework, which keeps the minerals in suspension and thus prevents limescale forming. The water’s increased solubility enables it to dissolve existing scale, which is gradually washed away. “Scalewatcher has proven itself to be highly effective. I would highly recommend this product and service without limitation,” concluded Antony Kinstley. Scalewatcher models are based on continuous research and over 25 years experience and expertise as market leaders in electronic scale control with countless units sold worldwide. The patented Scalewatcher systems are capable of treating pipe sizes from one to 120 inches. All Scalewatcher systems come with a full performance guarantee and are shipped throughout North America.

    By Scalewatcher North America Inc. based in Oxford, PENNSYLVANIA (USA).

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