Tags
Organics Recycling
Composting

Burning through waste, cooking up compost

Solid waste division has increased compost production and reduced fire risk with 6800BT horizontal grinder

Jeff Barber, yard waste and landfill manager for the Rapid City Solid Waste Division, with their recently acquired 6800BT horizontal grinder.
Jeff Barber, yard waste and landfill manager for the Rapid City Solid Waste Division, with their recently acquired 6800BT horizontal grinder.

Jeff Barber has worked at the Rapid City Solid Waste Division, in South Dakota, for 18 years and currently manages their yard waste and landfill operations. The division also provides residential collection of curbside recycling and operates an MRF. Barber's team produces three different types of compost, made from incoming MSW (municipal solid waste) or yard waste, including a 50/50 MSW/yard waste mix. The MSW and 50/50 composts are processed in a controlled environment, with the yard waste operation manually watering and turning the material to maintain an aerated, hygienically safe and finished product.

Annually, on average, the Rapid City landfill receives 18,000 tons of yard waste. As a regional facility, they accept and process waste from a large portion of southwestern South Dakota. Due to the limited number of composting facilities in the region, contractors in other counties, and even other states, also regularly rely on Rapid City to accept their material.

According to Barber, a significant amount of raw yard waste material is hauled in by landscape and mowing businesses in the surrounding region, and the facility sees a lot of pine trees and forest debris coming in from commercial fire remediation contractors who clean up around homes, trails and parkways. Once raw material is on the ground at Rapid City landfill, a meticulous process is used to convert it to a refined product that meets environmental standards and the end-use needs of consumers.

Essential elements
One of the key tasks at the Rapid City facility is grinding. Incoming carbon-rich, organic material is ground into something that can be processed and converted into saleable, high-quality compost. 

In his 18-year tenure at the landfill, Barber says four days of grinding in a workweek had been the routine. This was until they invested in a CBI 6800BT horizontal wood grinder for their application.

Now they grind one day a week, if that.

"What we grind now in a day used to take us three to four days," Barber says. "We used to grind four or five days a week with our other grinder. It's phenomenal how fast this thing runs material through it."

Logs, trees, branches and other materials are run through their 6800BT grinder and placed in windrows. Beyond watering and turning them, the facility heats the piles to a perfect temperature (140-150 degrees Fahrenheit) and lets it slow-cook for 14 days into a fresh-smelling, nutrient-rich product. 

"We try to get our compost to make the thirty to one carbon-nitrogen ratio," Barber explains. "If the carbon to nitrogen (C:N) ratio is too high in the compost pile, decomposition slows down. If the C:N ratio is too low, the pile takes on a foul odour. If you get it too hot you kill the good bacteria."

After the compost is held at ideal temperature for 14 days, a sample is brought to their lab to ensure it meets environmental standards.

Added benefits
The CBI 6800BT has been specifically designed for land clearing companies, mulch producers and yard waste processors, like the Rapid City Regional Landfill, who demand high-volume throughput and maximum reliability. 

According to CBI, the 6800BT processes more material at a lower cost per ton than other similar machines on the market, and is the first grinder that can grind whole trees as fast as a 30-inch chipper can chip. 

Barber confirms that he is impressed with the 6800BT's processing speed.

"Even when I help out our grinder operator, we can't keep the machine fed with two loaders and stay caught up with the machine," he says. "The efficiency frees up one man. When we're not grinding four or five days a week, it frees up a guy to run a windrow or a packer." 

Beyond cutting their grinding time down to a fourth of their previous benchmark, the 6800BT's reliability and maintenance-friendly design helps Barber's team get the most out of the day. Maintenance tasks that used to take an hour now take 15 to 20 minutes.

"It's a very simple machine and everybody was surprised with how open it is to work on it and where the hydraulics are located," Barber says. "Everything is easy to get at and easy to grease. You can open the throat up in it and change the teeth. You can change the whole set of teeth in about twenty minutes."

Barber emphasizes as well that they've had zero downtime with their new grinder. As a result, more green waste is recycled for its eco-friendly purpose as compost, and the pile at their facility stays at a manageable and safe size. He adds that due to the high production they've achieved with their 6800BT grinder, they've seen a secondary benefit.
"The grinder keeps our pile smaller so we don't have to worry about fire," Barber explains. "In years past we've had some major fires out here with our bulk pile getting too big. We're able to manage it well now."

He adds that they already now have a 50/50 compost product available to nearby residents for next spring's growing season. "We're providing a sustainable solution at a bargain price," he says, and is proud to add that Rapid City Solid Waste Division is now more focused than ever on safe, efficient and environmentally friendly waste services for the community. Plus, due in large part to the high productivity and efficiency of their 6800BT grinder, their increased diversion of yard waste is helping to significantly extend the useful life of the Rapid City landfill.

This article was the cover story and originally published in the November/December 2017 edition of Recycling Product News, Volume 25, Number 8.

  • CBI’s 6800BT horizontal grinder is capable of processing whole trees as fast as a 30-inch chipper can chip.
    CBI’s 6800BT horizontal grinder is capable of processing whole trees as fast as a 30-inch chipper can chip.
  • High processing speed helps Rapid City keep their bulk pile smaller, decreasing the risk of fire.
    High processing speed helps Rapid City keep their bulk pile smaller, decreasing the risk of fire.

Company Info

  • Continental Biomass Industries, Inc.

    22 Whittier Street
    Newton , NH
    US , 03858

    Continental Biomass Industries, Inc. (CBI), of Newton, NH, is the leading provider of portable and stationary biomass recovery solutions. CBI’s Magnum Force Series grinders and chippers are capable of handling demanding applications in the forestry, construction and demolition debris, municipal solid waste, biofuel power generation, pulp and saw mills, mulch, landscaping, and yard waste markets. For more than two decades, CBI has supplied the most durable, reliable, and productive equipment in the industry, with emphasis on minimizing downtime and maximizing throughout. CBI products also include the Grizzly Mill® Wood Waste Hog, the Annihilator (known as the Mother of all Shredders) and Stationary Screening Systems.

    Read more

Latest News

Tags
Wood Recycling

​Kreider Mulch leans heavily on Doppstadt machines for organics processing efficiency

Kreider Mulch is the proud owner of the first SM 720SA trommel manufactured by Germany-based Doppstadt , along with multiple AK model horizontal grinders, and most recently, a DW 3060 slow-speed shredder.

Randy Kreider grew up in Lancaster, a quaint small town in rural eastern Pennsylvania. Unless you're inside the urban boundaries of Philadelphia, most of this half of the state is economically driven by agriculture and other natural products. As the owner of Kreider Mulch, Randy has been able to capitalize on those opportunities, turning this once-small bark mulch lot into a successful business that produces more than 150,000 yards annually. He recently built a robust topsoil operation to complement the mulch products.

Read More

Sponsored Content

"Rolling Out the Recycling Red Carpet – 2018 RCA Conference"

"The Recycling Council of Alberta (RCA) 2018 Waste Reduction Conference "Rolling Out the Recycling Red Carpet" will be held September 19-21, 2018 at The Banff Centre for Arts and Creativity in Banff, Alberta. This conference offers an exciting and progressive array of current topics and high quality speakers, including keynote speaker Glen Murray, Executive Director of the Pembina Institute and former Environment Minister in Ontario, where he championed Extended Producer Responsibility and the Circular Economy. Sessions cover topics ranging from legal issues to international programs and an EPR bearpit. An interesting choice of tours helps to round out a very comprehensive waste reduction learning experience in one of the world's most beautiful and inspiring locations. Join your waste reduction peers in Banff at this premier waste reduction event. Program updates, registration information, and other details are now available on the conference web site. Be sure to come back to this site often - the program will continue to be updated as speakers, sessions, and other feature events are confirmed."

Learn More about the 2018 RCA Waste Reduction Conference

Tags
C&D Recycling

​A-1 Sandrock paves the way with recycled asphalt shingles and Terex equipment

A-1 Sandrock added two CBI 5800BT grinders in 2017 to help process asphalt shingles as well as wood waste.

With 12 million tons of tear-off roofing material being generated each year in the United States, and increased regulations, the industry demands efficient recyclers. Efficiency is second nature to A-1 Sandrock. The company has rose to the challenge over the last few years, growing their shingle disposal program into a massive operation that's convenient for roofers, communities, North Carolina, and the surrounding states.

Read More

Tags
Industry News
Metals Recycling

ISRI’s Annual Commodities Roundtable to focus on domestic consumption with an eye on global markets

ISRI’s Annual Commodities Roundtable to focus on domestic consumption with an eye on global markets

The Institute of Scrap Recycling Industries, Inc. (ISRI), the Voice of the Recycling Industry, is hosting its annual Commodities Roundtable Forum, September 5 to 7, 2018, in Chicago. This event attracts brokers, traders, buyers, and sellers of scrap materials for up-to-date discussions on commodities markets and the state of global and domestic trade.

Read More

Tags
Fleets & Technology
Solid Waste

NEW WAY and Recology partner on project to put first electric-powered waste collection trucks on the road in Seattle

New Way Trucks and Recology have announced a continued partnership that is working on a project that will bring  the first two electric refuse collection trucks to Seattle, Washington. The BYD Motors 8R Class-8 battery-electric trucks, fitted with New Way Viper Rear Loader bodies, are scheduled for delivery to Recology in early 2019. The two trucks will be used for residential solid waste pick up and will be the first electric refuse trucks in the Pacific Northwest region, according to New Way. 

Read More

Tags
Metals Recycling
Tire Recycling

​Puritan rotating drum magnets designed for continuous self-cleaning and high productivity in recycling

​Puritan rotating drum magnets designed for continuous self-cleaning and high productivity in recycling

Rotating Drum Magnets from Michigan-based Puritan Magnetics, Inc. are designed for continuous self-cleaning of ferrous materials from product flow streams. As product enters the housing inlet, an adjustable feed gate meters the flow of product to the drum face. The drum has a stationary internal magnet with an outer drum that rotates. 

Read More

Tags
Metals Recycling

WENDT announces exclusive strategic partnership with MOROS Industrias Hidraulicas SA

WENDT announces exclusive strategic partnership with MOROS Industrias Hidraulicas SA

WENDT CORPORATION, a leading manufacturer and systems integrator of automobile shredding and non-ferrous separation equipment, today announced that it has entered into a strategic partnership with MOROS Industrias Hidraulicas SA, a Spanish manufacturer of high-quality and robust machinery for the ferrous and non-ferrous scrap metal recycling industry. The exclusive partnership will allow the Zargoza, Spain-based MOROS to offer their shears and balers to the North American marketplace, through the WENDT sales and service platform. The agreement will extend to the United States, Canada and Mexico.

Read More

Tags
Metals Recycling

​Eriez RevX-E ECS with quick change belt helps Andersen's Sales & Salvage produce quality twitch package

Andersen's Sales & Salvage in Greeley, Colorado, takes the quality of its shredded nonferrous metals products seriously — to the extent that it developed its own patented IQASR system to create premium zorba and zurik grades. IQASR technology uses horizontal airflow to separate heavy fraction ASR from the light fraction.

Read More

Tags
Metals Recycling

New 855 E expands Sennebogen product line

SENNEBOGEN has introduced the new 855 E model to its line-up of material handlers, which the company says completes the largest product line of purpose-built material handlers worldwide. With an operating weight of approx. 160,000 lb. (72.5 tons) the new 855 features reach packages from 59 to 68 feet (18 to 21 meters), a powerful 305 HP (227 kW) Cummins Tier 4f diesel engine as well as SENNEBOGEN's "Green Hybrid" technology. The new 855 E as well as all other models are available as rubber tired, crawler and stationary versions and can be equipped with diesel engines or electric motors, applicable for a range of applications, including port and recycling.

Read More

Tags
Paper Recycling
Plastics Recycling

​Paperboard to replace plastic for Swedish card manufacturer and others, including products from IKEA and Apple

Gift cards using paperboard rather than plastic materials can drastically reduce  environmental impact of the product, according to Iggesund Paperboard.

According to a press release from Iggesund Paperboard, part of the Swedish forest industry group Holmen,  a number of global companies have replaced, or are doing trials to replace, the material in their gift cards - from plastic to paperboard. Sweden's largest cinema chain, SF Bio, has taken the plunge and is now replacing all its cards.

Read More

Tags
C&D Recycling
Metals Recycling
Solid Waste

New orange-peel grapples from Cat designed for a range of applications

The new Cat GSH420 and GSH520 orange-peel grapples can be used for moving waste, rocks, scrap and more.

The new Cat GSH420 and GSH520 orange-peel grapples, replacing the GSH15B Series grapples, are designed for a wide range of applications, including handling shredded scrap, such as long structural beams and car bodies; handling rocks at construction sites; and waste at recycling and transfer stations. The performance and efficiency of the new Cat grapples help waste-handling operations, in particular, meet the challenges of increased environmental regulation, growing pressure to recycle a mix of materials, and stringent budgets.

Read More

Tags
Metals Recycling

New Cat mobile shears designed for scrap and demolition applications

The new Cat mobile shears are designed for use in scrap and recycling operations.

The new Cat S2000/S3000 Series mobile shears, designed for hydraulic excavators working in scrap and demolition applications, feature optimum force-to-weight ratios that yield faster cycle times and more cuts per hour, compared with predecessor models. Manufactured from alloy steel that has both superior yield- and tensile-strength properties, as well as substantially greater hardness ratings than T1-type steel, the new S2000/S3000 Series shears are engineered for long, productive service.

Read More

Tags
Industry News
Metals Recycling

U.S. recycling industry united on goal of addressing key industry issues

U.S. recycling industry united on goal of addressing key industry issues

In May, a group of organizations representing various segments of the recycling industry met to discuss ways to better collaborate to advance the industry as a whole. The initial meeting, which took place in Washington, DC, at the headquarters of the Institute of Scrap Recycling Industries, was an open discussion aimed at identifying ways throughout the recycling stream to improve quality, increase demand for material, and promote products made with recycled content.

Read More