Dredging World News Blog

Proactive Dredging: A Little Now or a Lot Later

Posted by Elizabeth Kaiser on Wed, Oct 19, 2011 @ 08:10 AM

By Isaiah Helm, Applications Engineer, SRS Crisafulli

 

If public works departments had a list of fun things to do, dredging sediment out of holding ponds would not be on it.  It’s like cleaning the shower in your bathroom.  Whether you make it a frequent quick job or an occasional laborious task, time and effort must be set aside to maintain a fixture that is as critical as it is uninteresting.  This is the scenario that played out for Georgia’s Cobb County-Marietta Water Authority (CCMWA) during the summer and fall of 2010, as reported in Public Works Magazine

CCMWA had two water treatment plants and a 25 million gallon reservoir in need of upgrade to meet the EPA’s Stage 2 Disinfectant and Disinfection Byproduct Rule of 2006.  During the upgrade, one plant would be running, one shut down.  The reservoir had to be at full capacity to do this.  Unfortunately, it hadn’t been dredged since 1978 and was half full of sludge.  

 proactive dredging resized 600The reservoir was restored to its original 14-foot depth
within six months.  (Photo Credit:  Public Works Magazine)

Timing of all the different upgrade stages coupled with the EPA deadline meant the reservoir had to be cleaned out in six months.  (The dredging had originally been scheduled to take place 2013-2014.) 

In other words, the CCMWA had to make up over 30 years of maintenance in 6 months (that would be one nasty shower!).  The result: increased scale, decreased competition, and ultimately an increased cost.  The amount of dewatering equipment doubled.  Four mobile belt presses and four recessed chamber presses were used.  Fifty trucks made four 45-mile round trips per day.  Bidding on the project was limited to the few large contractors who were even capable of completing the project.  There were five bidders and all five of them listed the same two companies as their subcontractors.  Total cost to dredge the reservoir and perform maintenance on the banks and sluice gates totaled just over $4 million.

The World Dredging Mining & Construction Journal [1] contains a version of the article authored by Steve Gibbs.  It goes on to discuss some observations from the project:

One of the lessons learned by CCMWA is the need for regular dredging of the reservoir.  One benefit of regular dredging is economics – greater capacity in the reservoir reduces the amount of pumping necessary to bring water from the Chattahoochee, thus saving electrical costs.  Also, doing a smaller dredging project every five years or so will eliminate the need to do a massive project such as the one just completed.

A deeper, cleaner reservoir will allow suspended solids to settle out better, which will enhance treatment efficiency.  The reservoir will also have ample capacity while the treatment plants are in their construction phase.

“This (the reservoir dredging project) will decrease the potential for water quality problems or process issues at our treatment plants,” said Ginn (CCMWA process engineer). “It’s a very good proactive preventive maintenance step.”

There you have it.  Proactive dredging of sludge-collecting ponds really does make life easier in the end.  It also increases the options:

  • Put out a request for bids on that smaller dredging project every five years

  • Contract with a dredging company to clean out the pond every five years

  • Rent dredging and dewatering equipment directly and eliminate the middleman

  • Purchase an automated or remote dredging and dewatering system and have it permanently installed for complete self-sufficiency

At least it’s something to think about while you’re cleaning your shower tonight.

 

[1] World Dredging Mining & Construction Journal, “Proper Planning for a Perfect Project” (Volume 46, Nos. 11/12, Page 16)

 

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Topics: Dredges, crisafulli, dredge, dredging, srs crisafulli, dredging abrasive materials, lagoon dredges, dredging system, dredging and pumps, dredging equipment rentals, rotomite sd110, lagoon, rotomite 6000c, Hydraulic dredging, rotomite 6000

Dredging for Gold in Remote Places

Posted by Elizabeth Kaiser on Wed, Aug 31, 2011 @ 09:08 AM

By Dave Stoltenberg, Dredge Rental Specialist with SRS Crisafulli

 

From Alaska to West Africa, SRS Crisafulli dredging experts are busy installing dredges and training operations personnel at producing gold mines.  Nearly all operating mines have overflow lagoons and impoundments for the collection of particulates, overflow mud, and tailings.  Typically the lagoons are lined, and are operated as part of a water treatment system to ensure all water released from the mine meets environmental regulations.  In many cases the water and particulates are acidic in nature and require specialized equipment adaptations such as stainless steel construction to ensure longevity.

Press play to view SRS Crisafulli FLUMP Dredge video

Gold mine companies find SRS Crisafulli Flumps to be an excellent choice for a variety of projects.  Small, remote controlled, extremely productive, and a high value, Flumps perform well across a wide range of applications and environments.  Project applications at gold mines are primarily for the purpose of either dredging waste sediments for dewatering and disposal or for the purpose of recovering gold from tailings or overflow sediments.  When used to dredge for disposal the sludge is sent to centrifuges or geobags, dewatered, and then disposed of.  When used to dredge for gold recovery the tailings are sent to a processing mill so the sediments can be re-processed.  In some cases tailings are recently produced, and in other cases the tailings are historical in nature yet still contain recoverable amounts of gold.

 

Gold Mine Dredging in Alaska










 

From Gold Mines in Alaska

 

 

Gold Mine Dredging in West Africa

To Gold Mines in West Africa

One characteristic shared by both Alaskan gold mines and West African gold mines is remoteness.  These operations, encompassing surface mines and underground mines, are a testament to the abilities of companies to build and sustain small cities in some of the most inaccessible locations in the world.  Alaskan locations are noted for their short summer periods and long duration cold winters while West Africa, south of the Sahara desert, is tropical in nature, with high temperatures and humidity.  Regardless of the environment, SRS Crisafulli’s attention to detail, rigorous manufacturing standards, and ability to customize solutions to the most demanding requirements results in long-lasting, dependable dredges.

Whatever your mining application, wherever in the world it might be, give one of our SRS Crisafulli dredging experts a call today to solve your problems.

 

Learn more about SRS Crisfaulli FLUMPs.

Fill out a dredge application form.

Request a free consultation.

SRS Crisafulll Dredges FAQ.

Topics: Dredges, crisafulli, dredge, dredging, dredging abrasive materials, mining

Why Zambia? SRS Crisafulli Mine Dredges Provide Useful Options.

Posted by Elizabeth Kaiser on Thu, Jul 21, 2011 @ 08:07 AM

African Growth and Opportunity Act, or AGOA Forum 2011, Lusaka, Zambia was an odd destination.  But that is where a Montana delegation of Small and Medium Enterprises, or "SMEs" went in early June, 2011.  The overarching goal of the AGOA Forum is to increase US - Africa trade volume.  Why would SRS Crisafulli participate?  SRS Crisafulli Dredges provide reliable and effective water management solutions to the mining industry in Africa.  Many African countries, including Zambia, are actively mining gold, copper and uranium, all of which need water management tools.  The Crisafulli dredges provide useful options for environmental managers at mines throughout the world.

Further, the classic Crisafulli trailer pumps, so useful to the US Army Corp of Engineers in dewatering US properties submerged in the Floods of 2011, may be of service to African growers managing water resources.

"I am excited to return to Zambia.  Next time I will visit the Zambian Copperbelt itself, take a helicopter ride over Victoria Falls, and go on a traditional safari.  In the meantime, I packed my bag with Zambian honey, and am buying imported South African wines from my neighborhood wine cellar," reports SRS Crisafulli attendee, President and CFO Laura M. Fleming.

Montanas in Lusaka, Zambia
Montanans in Lusaka, Zambia:  Laura M. Fleming, SRS Crisafulli, Inc.,  Joan Wadelton, diplomat, State Department, Africa Women's Entrepreneurship Program (AWEP) and Cora Neumann, Co-Director African First Ladies Fellowship Program, under the big tent at the conclusion of AGOA Forum.

"Greetings to my fellow travelers,"  Click here:  AGOA Zambia 2011 - Laura Fleming - Picasa Web Albums - some snapshots from the AGOA Forum.

Thanks to the support of the Montana World Trade Center and the Corporate Council on Africa:  Click here:  Montana World Trade Center Press Release

Congratulations to Secretary Clinton on her fine leadership: 

 

Congratulations on political stability, economic growth and an excellent outlook to the citizens of Zambia.  Click here:  Embassy of Zambia - Economy

 

 

 

Topics: Dredges, crisafulli, dredge, agriculture, mining, AGOA

For $50,000, who wants to be a SRS Crisafulli Millionaire?

Posted by Elizabeth Kaiser on Thu, Jul 14, 2011 @ 13:07 PM

SRS Crisafulli's factory location is intriguing.  SRS Crisafulli is a dredge and pump manufacturer with a factory in land-locked Eastern Montana.  "Glendive, Montana is a unique and very rural community" says SRS Crisafulli President/CFO, Laura M. Fleming. "Glendive is about as far off the beaten track as can be found in modern America. We had two visitors from Israel this week, and sent them home with special stories about Eastern Montana."SRS Crisafulli Factory Employees

"Good People Surrounded by Badlands" is a phrase promoted by the Glendive Chamber of Commerce.  "It was even a $50,000 question on Who Wants to be a Millionaire" adds Ms. Fleming.

"When I present at public speaking events, I use the phrase:  'The River is our Teacher.'  The Yellowstone River and the unique terrain in Eastern Montana created the Company - and vice versa - the people who homesteaded in this area developed unique irrigation methods and technology.  The landscape contributes to the DNA of SRS Crisafulli" says Ms. Fleming.

Photojounalist Lynn Donaldson has visited the Glendive and the SRS Crisafulli factory on several occasions.  "You may visit Lynn's Montana blog at www.placesbetweenspaces.com where you will get a taste of real Montana", says SRS Crisafulli Sales Manager Maureen Lundman.

Yellowstone River at Glendive

The 28 year SRS Crisafulli veteran employee, Ms. Lundman, says "Glendive, our 'City by the Yellowstone', offers unrivalled scenery.  The mighty Yellowstone River bisects the town.  We're always watching the river."

Makoshika State Park

"Glendive is bordered by the rugged and majestic Makoshika State Park. Makoshika (Ma-ko'-shi-ka) is a variant of a Lakota phrase meaning land of bad spirits or badlands."

"Glendive is a warm & welcoming community, and a great place to live--with an excellent school system, a 2-year college, state-of-the-art medical facilities, fantastic hunting, fishing and recreation, as well as a good share of the fine arts available locally."

"SRS Crisafulli employees count themselves as fortunate to live under Montana's Big Sky!" comments Ms. Lundman.  

For additional background about Glendive, please visit:  www.glendivechamber.com

For additional information about Makoshika State Park, please visit:  www.makoshika.org

For a taste of real Montana, please visit Photojournalist Lynn Donaldson's blog:  www.placesbetweenspaces.com

Topics: Dredges, crisafulli, dredge, dredging, marina dredging, srs crisafulli, lagoon dredges, International Exports, Hydraulic dredging

Dredging Q+A: Top 8 Questions Answered

Posted by Elizabeth Kaiser on Wed, Jul 13, 2011 @ 19:07 PM

dredging questions and answers

 

We strive to provide our customers with as much information as they need to make informed decisions about the dredging equipment they choose.

So we compiled some of the questions (and answers!) asked most frequently for your quick review.

Q: What kinds of dredges does SRS Crisafulli make?


A: SRS Crisafulli produces hydraulic dredges with horizontal auger cutterheads in two model groups - i.e., self-propelled, steerable, operator on-board diesel powered Rotomites, and remote-controlled, cabled, electrically powered, unmanned FLUMP dredges. 


Q:  What sizes do SRS Crisafulli dredges come in?

A:  The remote-controlled FLUMP comes in two sizes:  the 3-inch (standard or  severe-duty), and 4 inch severe-duty. The Rotomote SD-110 is equipped with a 4-inch pump and six-inch discharge.

The Rotomite 6000 and Rotomite 6000C models are 6x8 (a six-inch pump with an eight-inch discharge.

Q: What is a FLUMP?


A: FLUMP stands for “Floating Lagoon Pumper”.  An operator runs the FLUMP from a hand-held radio remote control, or from a shore panel connected by wire to the FLUMP.

Q: What is a Rotomite dredge? How is it different from the FLUMP?


A: The Rotomite Dredge series includes manned (“operator onboard,”) self-propelled, steerable dredges which can operate without a support vessel.  Normally, these models are diesel-hydraulic powered, although a few are offered in all-electric customized versions.


Unlike the FLUMP, the Rotomite doesn’t require a cabled traverse system to control dredge movement.  For the customer’s convenience and to increase versatility, Rotomites are designed to operate as either cabled or free-floating (not cabled,) dredges.

Q:  How deep can I dredge with a SRS Crisafulli dredging system?


A: Dredging depths are 10 feet with a standard duty FLUMP and 12 feet with a severe duty FLUMP.  The Rotomite SD-110 will dredge up to 12 feet and the Rotomite 6000 will dredge up to 20 feet.  SRS Crisafulli's newest model, the Rotomite 6000C, reaches a depth of 23 feet.  Greater depths are available as custom models.

Q:  How much material can be dredged with a SRS Crisafulli dredge?



A:  FLUMPs can dredge 25 to 80 cubic yards of settled solids per hour and Rotomites can dredge up to 150 cubic yards of settled solids per hour.

Q: How far can the dredged slurry be pumped without a booster pump?


A: Typically, Crisafulli dredges will pump slurried material up to 1,500 feet, depending on the site conditions and the slurry.

Q: What is a good application for a Crisafulli dredge? Is it right for my needs?


A: SRS Crisafulli dredges are installed in some of the world’s most demanding environments, and dredge a wide variety of materials in both industrial and municipal settings.


SRS Crisafulli dredges are frequently used in the following applications:


-Residuals from potable water treatment plants
-Biosolids from wastewater treatment plants
-Runoff ponds, basins and lagoons
-Mines (for the management of tailings)
-Power plants (for fly ash ponds and sedimentation ponds
-Refinery and petrochemical wastes
-Processing plants (Food processing; Rendering; Slaughterhouses)
-Metal processing wastes
-Chemical sludges
-Marina and canal maintenance

If you have a question that wasn’t answered in this list go to: Dredge Q+A

Learn more about our dredges here:


Unmanned, remote controlled electric dredges for industrial and municipal lagoon maintenance


Self-propelled diesel dredges can dredge about anywhere without cumbersome cabling


Self-propelled, manned, 6" diesel dredge for abrasive slurrries

Topics: Dredges, dredge, dredging, dredging abrasive materials

Need A Dredge For A Small, Difficult Application?

Posted by Elizabeth Kaiser on Mon, Jun 20, 2011 @ 06:06 AM

dredge sd110 srs crisafulliSRS Crisafulli’s new shallow draft dredge, the Rotomite SD110, enables operators to dredge in small, shallow, confined areas in a minimum of 17 inches of water. This compact, self-propelled, steerable  machine can dredge just about anywhere without the use of cumbersome cabling. The SD110 is made entirely of aluminum, and is equipped with a hydraulic ram that puts a great amount of pressure on condensed materials that may otherwise be hard to remove.

Designed specifically for marinas, boat slips, bays, and other confined areas, the SD110 can pump dredged sludges and slurries over substantial distances to remote disposal sites.  It’s propelled by a 40HP outboard engine and its 110 horsepower diesel engine that powers the pump and auger can process 85 cubic yards of sludge solids per hour.

It can dredge to depths of between eight and ten feet, depending on the model chosen. It discharges up to 1,475 gallons per minute at 123 feet of TDG (water,) and can travel up to 10 mph when not dredging.

SRS Crisafulli offers its dredge customers worldwide installation and training services, and also offers complimentary consulting services by its experienced engineers at its Glendive, MT factory. To speak with a engineer today click here.

 

Learn more about our dredges here:

Unmanned, remote controlled electric dredges for industrial and municipal lagoon maintenance

Self-propelled diesel dredges can dredge about anywhere without cumbersome cabling

Self-propelled, manned, 6" diesel dredge for abrasive slurrries

 

Topics: Dredges, dredge, flump, rotomite sd110

Dredge Dealer Dairy Specialists Wins Business Ethics Award

Posted by Elizabeth Kaiser on Fri, May 20, 2011 @ 09:05 AM

Dredge DealerDairy Specialists, an SRS Crisafulli agricultural dredge dealer for more than two years, was awarded with the Colorado-based CEBA Bill Daniels Business Award in March for conducting every aspect of its business with the highest of ethical standards.

Companies who receive the CEBA award are nominated by customers, vendors and organizations in the community at large.

When asked why Dairy Specialists was selected for this award, Owner Randy Sorensen had the following response:

“I think the way we choose to do business really resonates with people.

Dairy Specialists’ mission statement serves as the framework for how our company operates.

Mission Statement:

Dairy Specialists will be the Rocky Mountain Region’s Premier Provider of Dairy Construction, Supplies and Service by providing:

  • The Best Designs in the Marketplace
  • The Best Construction Quality & Time to Completion
  • The Best Service & Products Available
  • The Best Internal Systems in the Industry
  • The Best People in The Business
  • The Best Value for Our Customers…Our Partners

 

We will be Outstanding Citizens of the Community that Makes Our Business Possible.

Creating a culture driven by the mission statement is a function of ethical, principled leadership at Dairy Specialists. The Leadership Team models the way for all our employees by framing every activity and decision it makes around the questions, “Is it the right thing to do?” and, “Does it drive us towards completion of our mission?” It’s simple, but it seems that, when framed in these terms, every issue, be it with vendors, customers, employees or the community at large yields consistently fair, quality outcomes. Our employees have quickly embraced this approach to doing business and feel empowered to make decisions and act accordingly knowing they will be supported.”

Dairy Specialists, one of three honorees, was selected from a group of 27 finalists, including 13 companies, seven non-profits and seven individuals representing a wide range of industries and community organizations from hospitals and youth agencies to law firms and financial institutions.

Dairy Specialists is one of the largest and most innovative dairy service and supply dealerships in the country. Supplying commercial dairy farms with innovative parlor designs, new construction, remodels and state-of-the-art dairy equipment and dairy waste management technology.

Dairy Specialists consult with their Dairy Customers for SRS Crisafulli’s Trailer Pumps and Remote controlled FLUMP Lagoon Dredges.

As with the agricultural industry , 2008, 2009 and early 2010 were 30 of of the worst months in the last thirty years for the entire dairy industry and specifically for dairy farmers in Colorado. Declining milk prices, increased feed and energy costs, coupled with the failure of one of the largest local dairy industry lenders, New Frontier Bank, led to the perfect storm for Colorado dairy farmers.

The opening of a new Laprino Foods Plant in Greeley will ultimately lead to the need for additional milk generation in the state, which will open up new opportunities for Dairy Specialists to participate in the design and construction of new dairy parlors as well as in the expansion of existing facilities. Ongoing innovations and involvement in bringing green energy and efficient waste management technologies to agriculture and the community as a whole, represent realistic opportunities for growth. The prospects for a good year in 2011 are looking up for the Colorado Dairy Industry.



To learn more about SRS Crisafulli dredge and pump solutions for the agricultural industry click here

 

To speak with Randy at Dairy Specialists email him at: Randy@dairyspecialists.com or visit www.dairyspecialists.com

 

If you have a dredging need request a dredge application form here.

Topics: Dredges, crisafulli, dredge, srs crisafulli, flump, lagoon, agriculture

Hydraulic Dredging: A cost effective solution for most dredging tasks

Posted by Dick Memhard on Fri, May 06, 2011 @ 06:05 AM

hydraulic dredging with crisafullis sd110The vast majority of dredging jobs require removal of solids to depths of 30 feet or less. Several features enable hydraulic dredges to be the solution of choice for these applications.

First, what are hydraulic dredges and how do they compare with alternative mechanical dredge types?

Hydraulic dredges create slurries, combinations of solids and water, pump the slurries to the surface of lagoons, ponds, lakes, waterways, and canals, and then pump the slurries through floating and land based pipe to disposal sites. The hydraulic dredging process can be continuous, as contrasted to intermittent in the case of so-called clamshell dredges.

Basic components of hydraulic dredges include a cutterhead, pump, floatation system or platform, engine or motor, control system, and the discharge system. Cutterheads dig up settled solids in the waterway to be dredged and create slurries.  A powerful centrifugal pump mounted directly behind the cutterhead draws the slurry into a discharge piping system, pushes the slurry to the surface, and then to the discharge site, often thousands of feet away from the dredging site. The engine, typically diesel, or electric motor, by means of hydraulic motors and high-pressure hose, transfers the engine’s power to the cutterhead and pump, and in the case of self-propelled dredges, such as SRS Crisafulli’s Rotomite-6000, to the dredge’s propulsion system. Hydraulic dredges integrate the foregoing components into a balanced, highly productive and efficient system.

Hydraulic dredges are made in several configurations, all of which except for cutter/suction and spud dredges, and dredges that require a support vessel, are made by SRS Crisafulli:

  • Horizontal auger hydraulic dredges
  • Suction dredges that have no auger
  • Free standing, self-propelled, steerable dredges with one or more onboard operators
  • Remote controlled dredges typically controlled by a cable system within a well-defined area
  • Dredges with varying degrees of automation
  • Dredges that can operate safely in highly caustic applications
  • Dredges that operate efficiently without a support vessel, or dredges that require a support vessel
  • Cutter/suction dredges
  • Dredges that are positioned with spuds (long, powerful spikes driven into the bottom of the waterway) and use hydraulic rams to apply forward force to the cutterhead
  • Hydraulic dredges are defined also by the depths to which they can dredge, the volume of water and/or solid material they move, the height to which they can discharge the slurry, the power of the auger (or cutterhead), the hardness and abrasiveness of the slurry, the size of solids the dredge pump can pass, dredging speed, width of dredging cut, the cutting power (torque) of the auger, and the cost of the dredge.

The foregoing features all contribute to and determine the productivity of the dredge and the owner’s Return On Investment (ROI) – i.e., how much work the dredge can do in relation to the initial cost of the dredge and the ongoing operating, repair and maintenance expenses of the dredge.

Other types of dredges and solids removal systems are classified as mechanical and include:

  • Clamshell dredges that typically must be operated with a crane
  • Huge, ocean going vessels that can dredge huge volumes at great depths
  • Drag lines that haul a large shovel through the area to be dredged

Each of the foregoing three dredge types provide advantages and disadvantages, including:

  • With the possible exception of draglines, these systems are far more expensive to buy and operate than horizontal hydraulic dredges. For example, horizontal auger hydraulic dredges vary in cost from approximately $150,000 to $700,000. SRS Crisafulli’s most expensive horizontal auger hydraulic dredge can be purchased new in 2011 for approximately $350,000 plus the cost of accessories, spare parts, and options. A high capacity cutter/suction dredge can cost upwards of $1.5 million. An ocean going dredge can cost several million dollars.
  • For the vast majority of applications these three alternative mechanical systems are “over kill”.
  • Clamshell/crane dredging systems together with the large barges the systems are operated on can dredge to greater depths, and dispose of the dredged materials many miles away at dumpsites approved by the EPA. But these systems are bulky, noisy, and more costly to buy and operate.

Selecting the best dredge solution for any application requires careful analysis by experienced, well-trained people in collaboration with the customer’s staff. Frequently, such an analysis requires the efforts of engineers with the skills and experience to sort out the many variables.

What would you like to do now?

  1. Request a dredge application form?
  2. Download the SRS Crisafulli product information DVD?
  3. Speak to one of our qualified technicians about your specific dredging requirements?

Topics: Dredges, crisafulli, dredge, srs crisafulli, Hydraulic dredging

Dredging Abrasive Materials? Learn about SRS Crisafulli’s New Dredge

Posted by Elizabeth Kaiser on Fri, Apr 29, 2011 @ 06:04 AM

dredging abrasive materials rotomite 6000cThe Rotomite-6000-C, SRS Crisafulli’s newest self-propelled dredge, broadens the Rotomite-6000’s capabilities to include removal of highly abrasive materials. The Rotomite-6000-C also increases the customer’s return on investment (ROI) by cutting sludge management costs, increasing user productivity, and enhancing the unit’s maneuverability for the removal of toxic and non-toxic solids.

The new design offers capabilities that will benefit industrial companies, including; chemical companies, food processing plants, domestic and international construction and contracting companies, oil, mining and refining companies, petrochemical plants and refiners, and coal fired utility companies. Municipalities, County, Regional and Federal agencies, as well as lake associations, and landfill operators, will be able to use the Rotomite-6000-C in many applications. In addition, the Rotomite-6000-C helps companies comply with domestic and foreign mandates by ensuring manufacturing by-products are contained safely in order to prevent contamination of drinking water.

This versatile, self-propelled design is a horizontal auger, hydraulic dredge that can work in odd-shaped areas where a cable dredge unit cannot go. It can remove, pump and discharge dredged solids in water/solids slurries through a floating discharge pipe to disposal sites up to 5,000 feet away, or more when a booster pump is used.

The Rotomite-6000-C is 40 feet long by 9.5 feet wide, and is easily transported by truck.  Its 255-horse power motor and new propulsion system provide increased production and propulsion thrust. It will dredge most soft or abrasive materials, including alum and lime sludges, bentonite, biosolids, bottom ash, clay, coal fines, fly ash, gypsum, mine tailings and slimes, mill scale, mud, pigmentation sediments, industrial and municipal wastes, pulp and paper residuals, peat, oil API sludge, sediments silt and sand.


Capabilities include:

  • Dredging depth of 23 feet standard (up to 30 feet optional)
  • Up to 235 cubic yards of sludge solids produced hourly
  • A discharge volume of up to 3,400 gallons per minute @ 180’ TDH (water)
  • A dredging speed of up to 25 feet per minute
  • A dredging cut up to 8.5 feet wide
  • A cutterhead torque of 11,500 inch/lbs.
  • A draft of 30 inches

The self-propulsion feature provides increased maneuverability, more forward and reverse speeds and a 72-horse power hydraulic motor that powers a propeller system capable of 2,500 pounds of force. SRS Crisafulli’s exclusive Cobra cutterhead, which provides 11,000 inch-pounds of digging torque and up to 235 cubic yards of sludge solids per hour, increases productivity. The hydraulic ladder results in enhanced downward force by providing 30,000 pounds of down pressure to dig into the settled solids materials more aggressively thereby increasing cutting capacity. An improved cab design provides operator safety and convenience features, including air conditioning and heating.


rotomite 6000c cta button resized 600

Topics: dredge, dredging, srs crisafulli, dredging abrasive materials, rotomite 6000c

6 Dredging Challenges Tackled easily with Crisafulli's Rotomite-6000

Posted by Elizabeth Kaiser on Wed, Apr 06, 2011 @ 08:04 AM

dredge rotomite 6000cThe Rotomite-6000 is a powerful, versatile machine, which has enabled Crisafulli clients worldwide to accomplish a wide variety of dredging challenges. The key to its success is an excellent standard design that can be readily adapted to meet the exacting needs of Crisafulli clients including companies serving manufacturing, agricultural, contractor, federal and state government, and municipal markets.

Crisafulli's engineers meet with clients to thoroughly understand client needs and will readily implement customer design suggestions to customize their Rotomite for their specific applications.

We invite you to review the many case studies available on our website. The case studies describe dredging challenges the Rotomite has tackled, and include customer evaluations of how the Rotomite served them.

To view the following Crisafulli Dredging case studies and testimonies click here.

  1. Steel Processing Facility: removing highly abrasive mill scale
  2. Food Processing Company: clean and maintain factory waste products settling lagoon
  3. Removal of bottom ash, silt and crusted sludge.
  4. Contractor: Environmental services for dredging and dewatering
  5. Dredge caustic soda from a mud lake: Jamaica
  6. Dredge caustic and abrasive materials: South Korea and Venezuela

 


 

 

Dredging challenges change constantly as do government regulations. We invite you to consult with our engineers who are experts in meeting government requirements. To contact us click here.

Do you have a dredging need? Crisafulli can customize a dredge to meet your specific need. Click here to download our dredge application form.

Topics: crisafulli, dredge, dredging, rotomite 6000