Dredging World News Blog

Natchez Wastewater Treatment Facility Finds Success with New System

Posted by Elizabeth Kaiser on Fri, May 04, 2012 @ 08:05 AM

By Elizabeth Kaiser, SRS Crisafulli Marketing Manager

A popular magazine at the SRS Crisafulli offices is Treatment Plant Operator (TPO), which serves municipal water system operators.

The November 2011 issue of TPO featured the Natchez, Mississippi Wastewater Treatment Facility in their Top Performer - Biosolids section, with an article titled "Sun Dried Success". 

"Natchez is the site of a new “greenhouse” solar biosolids drying system" states TPO.

The American Council of Engineering Companies recently awarded WGK, Inc., the general civil/engineering and surveying firm for this project, their Grand Conceptor's Award for the design of the upgrades to the plant.  Congratulations to WGK!

Natchez has two, 3-acre holding ponds.  Prior to their system upgrade, the disposal process for the sludge from these holding ponds was expensive and time consuming.  Natchez WWTF hauled their biosolids - with solids content of 10% - and disposed of the material using liquid injection at a nearby site. 

Today, the wastewater treatment plant produces a biosolid with at least 75% solids that meets class A standards.  A SRS Crisafulli FLUMP dredge helps the plant accomplish this new standard successfully.

 Natchez FLUMP dredge

 Photo Credit:  TPO magazine, November 2011

Installing a FLUMP dredge eliminated transportation and equipment rentals costs, and reduced environmental risks. The total project impact has reduced operating expenses by at least $200,000/per annum.

Michael Stewart, Natchez Wastewater Treatment Plant Manager, told SRS Crisafulli their goal was "not to make money but to save money."  Michael said they "save money every time they start the FLUMP dredge."

The Natchez Wastewater Treatment system went online a little over a year ago.  Today, their Crisafulli FLUMP dredge is operating 8 hours a day, while in production, and is going strong.  The Crisafulli FLUMP dredge pumps the dredged sludge from the ponds to a 65,000 gallon tank.  The sludge is then pumped to a belt press conveyor system.   The FLUMP dredge fills this 65,000 gallon tank twice a day.

The Natchez Wastewater Treatment Facility intends to resell the sun dried product to farmers. The wastewater treatment facility will not only save money with their new system, but will also make money.

Do watch the November 2011 TPO video of the Natchez system, narrated by Michael Stewart, Plant Manager.  He does an excellent job of explaining the art of this 5 million galls/day rated wastewater treatment facility, serving a population of 30,000.

 

 

Read the TPO "Sun Dried Success" article.

Read Natches Democrat article "Water Works awarded for dealing with your waste".

Watch a Crisafulli FLUMP video.

Read Crisafulli FLUMP case histories and testimonials.

 

Topics: Dredges, crisafulli, dredge, dredging, lagoon dredges, dredging system, dredging and pumps, flump, lagoon, TPO, Treatment Plant Operator, Municipal dredging, biosolids

Ask a FLUMP Expert. Seven ways to Secure your Traverse System

Posted by Elizabeth Kaiser on Thu, Jul 28, 2011 @ 08:07 AM

The propulsion and traverse systems are critically important to the operation of an unmanned, cabled dredge. The FLUMP, SRS Crisafulli's unmanned dredge, propels itself along a traverse cable connected to lateral cables at opposite sides of the lagoon, configured at 90 degrees to the traverse cable.

The FLUMP's drive system is onboard.  SRS Crisafulli's FLUMP Specialist, Senior Applications Engineer Eric Lillberg, explains seven ways to secure the lateral traverse cables to land, on opposite sides of the lagoon.

The standard method is to drive three 48" long stakes into a triangular steel base plate on each of the four corners of the lagoon or pond.  From the four corners, wire rope winches are connected to each lateral cable, each of which is connected in turn to the traverse cable that runs the length of the lagoon.  The corner winches can exert 2,000 lbs. of tension into the cable system. 

Normally, this method provides more than adequate results, depending on the length of the traverse cable.

traverse 1 resized 600

Even at 700 lbs. of tension, however, a base plate can be pulled out of soft ground, which leads us to Method #2, a daisy chain setup with multiple stakes connected by chains or cables.

Method #3:  In more permanent installations the use of concrete bollard posts is an economical solution. 

 Traverse   2

 

Method #4: A motorized trolley system mounted on a steel rail structure. A rail structure with a motorized trolley system is the preferred method for permanent installations.  The rail structure adds cost to the system, but can result in a substantial reduction in ongoing operator cost thereby improving the overall return on investment (ROI) from the dredging system.  Traverse 3 resized 600

 

Method #5:  When the lagoon is surrounded by hard packed or rocky terrain, other methods have been utilized, including large concrete blocks, about 32" x 32" x 64" and weighing approximately 5700 lbs.  Depending on the lay of the land, it may take some jockeying to prevent the blocks from sliding, once tension is applied.

 Traverse 4 resized 600

 

Method #6:  We have drilled holes in existing rock and concrete structures to set anchors. 

Method #7:  A not so common, but equally effective approach is to use two motor vehicles, one on each side of the lagoon.  Skilled drivers move the two vehicles in perfect parallel, enabling the system to work with no adjustment to the traverse system. Traverse 5 resized 600

 

No matter what the method, a taut cable is essential to effective unmanned dredging.

Read more about SRS Crisafulli's Cable Traverse System.

Click here to ask us a question.  Mention Eric's article.

Topics: lagoon dredges, dredging system, flump, agriculture

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