Dredging World News Blog

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

SRS Crisafulli Dredges Featured Dealer: Titan Machinery

Posted by Elizabeth Kaiser on Mon, Jun 13, 2011 @ 08:06 AM

 

titan machinery logo

SRS Crisafulli has teamed up with Titan Machinery to offer local product support, maintenance, repair and comprehensive customer service to their customers across the country.


“Our priority is to help our dealers grow their business, and the best way we can do that is to offer them the broadest selection of equipment and the best customer service available,” says Richard C Memhard, Chairman of SRS Crisafulli.

Titan Machinery owns and operates one of the largest networks of full service agricultural and construction equipment stores in the nation, with 87 dealerships nationwide.


The agricultural machinery and attachment equipment 
Titan sells and services runs the gamut from large-scale farming machinery to home and garden equipment. They offer a wide selection of heavy construction and light industry machinery for both commercial and residential construction, road and highway construction and mining applications.


On the construction side of the business, they service a wide range of customers from owner-operators to large fleet customers to the municipal and government markets.

 “Our goal at Titan Machinery is to provide world-class solutions, including pumps and dredges, to our customers.  Crisafulli is a great company with an excellent product.  Leveraging the Crisafulli product line with the Titan Machinery full-service dealership network provides excellent value to our customers.” said, Mike Hall Marketing Manager for Titan Machinery.


To learn more about SRS Crisafullis Product Line, download our DVD here.









Topics: Dredges, srs crisafulli, titan machinery

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

How Marinas Benefit From Scheduled Dredging

Posted by Elizabeth Kaiser on Fri, Apr 15, 2011 @ 08:04 AM

dredging marinas - SRS Crisafullidredging marina - srs crisafulli

Scheduled dredging enables marina owners to increase their profits and minimize their environmental impact.

 

The purpose of this article is to highlight the importance and value of scheduled dredging for marinas.

Maintaining adequate water depths in each boat slip and on approaches to marinas at low tide is essential to attract and keep the largest yachts in the regional market – yachts that generate the largest marina fees.

Without regularly scheduled dredging, marinas can be temporarily forced to close their slips for their best paying customers. Dredging just part of a marina can have costly and adverse environmental consequences in tidal areas by accelerating silt build up in slips for larger boats, and compromising water flows and drainage throughout the marina.

Environmental issues are more complex and include:

• Protection of water quality and marine life.
• Protection of docks, slips, and boats.
• Removal and disposal of clean sediment.
• Removal and disposal of contaminated sediment.
• Traffic, noise, and odors disturbing neighbors.

Since sediment build up is ongoing and predictable, a dredging schedule should be seriously considered. Key benefits of a dredging schedule include: 

• A budgeted expense rather than an unpredictable cost.
• Uninterrupted use of the marina.
• A reduction in problems caused by the permitting process often related to sediment disposal.

Most experts recommend dredging at two or three year intervals.

marina dredging srs crisafulli case study 

 

 

 

SRS Crisafulli is a leading dredge manufacturer for a wide range of applications. Learn more about who we  help here...

 


Next time your marina is due to be dredged will you contract the task to others or do the work yourself? Please share your thoughts in the comments section below

Topics: Dredges, dredging, marina dredging

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

Miss Montana Scholarship Contestants at Glendive Plant

Posted by Elizabeth Kaiser on Fri, Jan 29, 2010 @ 16:01 PM

Product Spotlight: Lagoon Slurry Trailer Pump

Posted by Elizabeth Kaiser on Tue, Jan 19, 2010 @ 16:01 PM

 
slurry pumpToday's SRS Crisafulli Slurry Pumps are the latest versions of a 40-year tradition - i.e., building highly efficient, rugged long lasting slurry pumps for use in agricultural waste pits.

SRS Crisafulli Slurry Pumps also work well for refineries, municipalities and geothermal plants.

Discover the versatility and productivity of SRS Crisafulli Slurry Pumps when used to remove viscous wastes from your ponds and lagoons.

See Video of Slurry Trailer Pump in action here.

http://www.crisafullipumps.com/SlurryTrailerPump/ 

Topics: crisafulli, Announcements, slurry trailer pumps