What is the controlled atmosphere brazing (CAB) process for manufacturing aluminum radiators, and how does this pertain to fleet vehicles?
The CAB process refers to how the aluminum parts of a radiator are joined together. This is done using a flux or chemical cleaning agent that prepares the aluminum for brazing. The CAB process has been around for approximately 15 years and has become more popular over the last few years, including with waste fleet vehicles.
Why are CAB radiators a concern?
The outside of the radiator that is exposed to the atmosphere becomes oxidized or passivated over time, meaning a natural protective coating forms on the aluminum. However, inside the radiator, the aluminum treated with the flux remains un-passivated and lacks that protective layer.
When a nitrited coolant is introduced to the radiator, it has a tendency to react with the un-passivated or unoxidized aluminum. This can create ammonia, which leads to an unpleasant odor, and other reactions that can cause the formation of precipitants that clog small orifices in the coolant system.
How do these CAB radiators affect nitrite-free coolants?
When using a nitrite-free coolant, the presence of flux can change the concentration of the additives in the coolant depending on the additive chemistry. This can cause the formation of precipitants, which again, can clog small orifices in the cooling system. pH imbalance, either too high or too low, can also lead to coolant system metal corrosion.
What can be done to protect against the degradation of coolants and corrosion of heavy-duty coolant systems containing CAB-processed radiators?
Some manufacturers have addressed the issue by offering a radiator conditioner that effectively passivates the metal inside the radiator. This allows for the use of a coolant containing nitrites, which some OEMs recommend for protecting cylinder liners from cavitation, while mitigating the problems caused by the un-passivated aluminum and flux. While some manufacturers have gone to a nitrite-free organic additive technology (OAT) specification due to the aluminum radiator issue, a few OEMs still call for nitrited OAT or NOAT coolants. Most equipment users in North America, therefore, are still using NOAT-based coolants, even if they have mixed fleets, and choose to use the radiator conditioners in new equipment or replacement radiators.
Is there a more comprehensive, less labor-intensive method to protect coolant systems and the coolants in today’s systems?
At Chevron, we have come up with an alternative solution, which is to change the composition of the coolant rather than treating the aluminum with a conditioner. Our new Delo® ELC Advanced extended life coolant is a NOAT formulation with patented technology that controls the reaction with the aluminum and the flux to extend system and coolant life. With Delo ELC Advanced, equipment operators will no longer need to rely on a conditioner to reduce the risk of a chemical reaction with the nitrite and un-passivated aluminum in their coolant systems.
Congress has made notable advancement toward pushing waste diversion and recycling legislation this year. In July, Democratic Rep. Ilhan Omar of Minnesota introduced the Zero Waste Act. If enacted, the legislation will provide $2.5 million in grant funding to local governments with projects geared toward the development of city and regional recycling capacity and the strengthening of domestic markets for materials that have limited end users. The proposed legislation would support sustainable solid waste management in the U.S. in a way that could be leveraged by local governments seeking to increase waste diversion through the use of alternative solid waste management strategies.
One way that municipalities can capitalize on this policy window is by creating comprehensive solid waste management plans that prioritize organics collection, processing and utilization by purchasers. To make impactful solid waste ordinances, municipalities must understand the supply of organics in their jurisdictions and the demand for soil amendments regionally. To do so, analysis tools like waste characterization studies and organic waste market studies can be useful. By gauging the supply and demand of organic-related materials, cities will be better positioned to advance their regional compost markets.
Local governments can also conduct benchmarking reports to identify cities with high waste diversion rates and compare strategies in relation to their own to begin the process of enacting organics diversion policies. During this process, governments should be sure to benchmark cities that have similarities related to factors that affect their organics markets, including population, processing capacity and presence of end users. Cities can refer to the EPA website at www.epa.gov/transforming-waste-tool for waste diversion and reduction support guidance.
Highlighted strategies include:
- Influencing the supply of compost in local markets by expanding curbside organics collection service for residential areas, as well as creating drop-off locations. The city of Portland, Oregon, for example, initiated a weekly organics curbside collection program of yard and food waste in 2011. Within one year, the city diverted 8,000 tons of food waste from residences. The city also switched to weekly recycling collection and biweekly refuse collection to further encourage residential organics disposal and recycling collection.
- Including incentives for organics waste diversion and productive use of organics within service provider agreements with waste haulers, such as through lower franchise fees. The city of Cupertino, California, for example, entered into a five-year franchise agreement with San Francisco-based Recology in 2010 that included the incentive of a contract extension based on the city’s achievement of a 75 percent diversion rate by 2015.
- Increasing organic waste processing capacity locally by considering waste conversion technologies. For example, through a public procurement process, the city of San Jose, California, selected the Zero Waste Energy Development Company (ZWEDC) and their dry fermentation anaerobic digestion and composting facility to process the city’s commercial waste. This contributed to San Jose’s overall 66 percent recycling rate in 2015.
- Influencing local compost markets with green procurement strategies. For example, King County, Washington, recently implemented an environmentally preferable product procurement policy requiring subcontractors to use soil enhancers from local composting facilities in their maintenance and construction projects.
While different markets require different strategies for diverting organic waste, looking outward to successful practices already being implemented can help local governments identify smarter—and more environmentally friendly—ways to manage waste.
Otto Environmental Systems names president
Otto Environmental Systems North America Inc., Charlotte, North Carolina, has named Michael Costello the company’s president. Costello takes over the role from former CEO Dave Piejak
“We all want to thank Dave [Piejak] for his time and commitment to the company,” Costello says. “Dave came in at a difficult time in our history and laid the groundwork for a new Otto. He worked hard to stabilize the company and prepare us for our transition to growth.”
Callidus Capital Corp., the owner of Otto that is headquartered in Toronto, appointed Costello to align with the customers they serve in the waste and recycling industry.
Costello has almost three decades of leadership experience in the waste industry, and he is committed to the manufacturing, sales and service of waste containers, the company says.
“I’ve been in the waste industry for over 25 years, holding leadership roles with Waste Management, Allied and Browning-Ferris Industries, and owning my own waste company. I know what our customers need to serve their residential customers,” Costello says. “What separates us is our commitment to our customers. Otto is the only residential cart manufacturer that focuses only on waste carts as our core business.”
Untha UK forms new management team
Untha U.K. has announced its new board of directors at the halfway point of the company’s financial year.
Managing Director Marcus Brew, who has been at the helm of Untha U.K. since 2016, is joined by Peter Streinik, who serves as director of global strategy.
Working with the team in the U.K., Austria-headquartered Streinik combines knowledge and insight from almost every continent of the globe, the company says.
Andrea Gratzer, based in Austria, has also joined the U.K. board as finance director. Gratzer has been with Untha for 16 years, and the company says she will be a key decision-maker as the U.K. operation strives to achieve 20 percent year-over-year expansion between now and 2022.
Gary Moore, promoted to sales director in September 2018, will blend his U.K. responsibilities with those of director for global business development. Untha says this dual company involvement represents the U.K.’s mounting presence on the international map.
“We’ve worked hard to secure the best possible people for these roles at a crucial time in our organization’s journey,” Brew says.
“Inviting Peter and Andrea to join our board from our Austrian HQ reflects our closer integration into this global business and the voice we now have within central operations,” he continues. “The U.K. market is very different than many others worldwide. Customer relationships matter a lot, and the growth potential here for both machines and service products is vast.”
Other recent appointments include Julian Lamb as Untha U.K.’s sales manager. Julie Cassidy serves as service coordinator and ex-chairman Chris Oldfield also has recently rejoined the team as commercial director.
Shred-Tech acquired by The Heico Cos.
The Heico Cos., Chicago, has announced it has completed the acquisition of a majority interest in Shred-Tech Corp. Shred-Tech specializes in the design and manufacture of mobile and stationary shredding equipment for the document destruction and recycling industries. Based in Ontario, Canada, Shred-Tech also has operations in the U.S., U.K. and Thailand.
Heico has partnered in the acquisition with Rob Glass, Shred-Tech’s president and CEO, who will continue to lead the company.
“Rob Glass and his terrific team have built a high-class company that is a leader in its field. We are excited to work with them to take the company to its next level,” says Emily Heisley Stoeckel, Heico chairman. “We are optimistic that Heico’s array of global resources will help Shred-Tech continue to grow and expand its offering of exceptional products and services to customers worldwide.”
“We reached a time when some of our founding shareholders were ready to exit the business, and we went on a search for a partner that would provide both a strong, long-term home for the company and its many valued employees and also the resources to continue our growth and development,” Glass says. “With its deep operating expertise, global network of businesses and long-term investing approach, Heico fits that requirement very well, and we are excited to work with it for years to come.”
Shred-Tech Corp. designs and manufactures a range of vehicles that provide mobile document destruction and secure document collection solutions for providers of records information management and secure document destruction services. The company also offers an array of stationary and mobile shredding systems for many different materials and applications in both the waste management and recycling industries.
Cobra screening buckets.
Ransome Attachments, Lumberton, New Jersey, has added Cobra screening buckets, developed and produced by Finland-based Cernos Oy, to its lineup of attachments. Features of the buckets include:
- a high screening capacity and adjustable grain size for waste soil and other materials to be turned into usable end products.
- a screener-crusher setting to handle wet, sticky and other difficult soils.
- the ability to fit equipment from miniature to full-sized excavators, wheel loaders, backhoes and telehandlers.
- a double-acting hydraulic circuit to allow the operator to screen and crush in forward or reverse.
Visit www.ransomeattach.com for more information.
Untha XR mobil-e waste shredder.
Austria-based Untha Shredding Technology has released its XR3000 for mobile waste shredding of bulky municipal solid, commercial and industrial, and construction and demolition wastes. Features of the XR3000 shredder include:
- an extensive range of interchangeable screens and cutters for custom configuration.
- electrical shredding capabilities.
- a crawler-type undercarriage and small gas-powered engine to move the machine with a remote control.
- the ability to shred multiple types of wastes into a homogenous alternative fuel for waste-to-energy or biomass uses.
Visit www.untha.com for more information.
Komptech Axtor 4510 wood shredder.
The Karlsruhe, Germany-based RecyclingAKTIV trade fair Sept. 5-7 presented a variety of recycling equipment, including Austria-based Komptech’s Axtor 4510 wood shredder. Features of the shredder include:
- modes for both shredding and chipping.
- small dimensions and a total weight of 19 tons in the two-axle trailer version for easy mobility.
- a large intake opening and aggressive intake roller designed for simple feeding of bulky items.
- an operating panel with color-coded graphics for easy control.
Visit www.komptech.com for more information.
ShearCore mobile shear.
Superior, Wisconsin-based ShearCore, a division of Exodus Machines, has introduced the FS145 mobile shear. Features of the mobile shear include:
- a new shark fin rear lug design to transfer stress, allowing higher forces to be distributed over greater mass.
- a rotating model with a weight of 28,000 pounds, a jaw opening of 46 inches and a jaw depth of 47 inches.
- a minimum excavator boom mount of 145,000 pounds with a minimum excavator stick mount of 250,000 pounds.
- large removable access panels for component replacement.
Visit www.shearcore.com for more information.
NORTH AMERICA'S LARGEST HAULERS
North America’s largest waste haulers stretch from coast to coast, generating tens of billions of dollars in revenue and employing hundreds of thousands of employees. View More