SRS Crisafulli News

Spring Schedule - Rural Water Shows in the Northwest

Posted by Laura Fleming on Thu, Feb 06, 2014 @ 13:02 PM

Well, it's actually a bit of winter schedule, but this winter needs more spring.

We are kicking off our trade show schedule by being in two places:  Fargo, North Dakota and Great Falls, Montana.  In both cases, we are attending the State Rural Water Show. 

At the Fargo Rural Water Show, SRS Crisafulli's Troy Fercho, Dredge Sales and Rental, will be making a presentation:  Wastewater Lagoon Dredging Process.

The A Team will then travel to Des Moines, Iowa, for their Rural Water Show (February 24 - 26), and swing by the Pumper Show in Indianapolis.  Let us know if you want to meet up.  We are traveling lightly at the Pumper Show - you will not find us on the Exhibitors List.

In March, we are working the Idaho Rural Water Show (March 12 - 14) in Boise, and then at the end of April, we will be at the California Rural Water Show at Lake Tahoe.  We can't wait for that show - as it will actually be spring then, even if California is experiencing a drought.

Of course, we will also be at the Glendive Agri-Tech Exposition at the Eastern Plains Event Center that opens tomorrow, February 7, and continues into Saturday.  We are introducing SRS Crisafulli's DUAL-PRO (540/1000) Power Unit at this event.  Please stop by.  Our original camouflage trailer pump will also be on display outdoors.


North Dakota Rural Water Association

In many areas of North Dakota, water used for domestic, municipal, and livestock needs, is of
insufficient quantity and/or quality. This has inconvenienced the residents of small towns and rural areas, as well as retarded the overall economic growth of North Dakota. The formation of rural water systems has helped to bring clean, safe water to many of these areas throughout North Dakota.

Montana Rural Water Association

Provides training and technical assistance to people running systems for drinking water, waste water, including tribal communities.

Iowa Rural Water:  Feburary 24 - 26

Conference theme:  Power of the Past;  Force of the Future

Idaho Rural Water Association March 12 - 14

Quoting from a recent press release in the Idaho Statesman:  "Idaho Gov. Otter touted a study in his State of the State address to look at raising the height of the nearly century-old Arrowrock Dam to increase the Treasure Valley's water supply.  But if the 348-foot dam is raised, it will be flood control that drives the decision and the millions of dollars in federal spending the project would need...  an estimated $10 billion worth of homes, buildings and other structures lie in the Boise River flood plain.  Water supply is a future concern for Idaho's farmers, but flooding is an every-year worry for anyone living along the river."

Water is never boring.

California Rural Water Association EXPO:  April 28 - May 1, South Lake Tahoe

Glendive Agricultural Trade Exposition  - Glendive, Montana


 in Just- spring when the world is mud- luscious the little lame balloonman whistles far and wee.
E. E. Cummings

Topics: dredging, Municipal dredging, water treatment plant, wastewater treatment plant, Rural Water, WWTP

SRS Crisafulli Asks "What is Coagulation and Flocculation?"

Posted by Elizabeth Kaiser on Wed, Oct 17, 2012 @ 15:10 PM

By Laura M. Fleming, SRS Crisafulli President/CFO

What is coagulation and flocculation, and why does it matter?

Last week, SRS Crisafulli hosted a bucket demonstration of Tencate Geotube technology, presented by Gregg Lebster of WaterSolve, from Grand Rapids, Michigan, and Jim Bridges, of Clearwater Dewatering, from Nampa, Idaho.

These relationships were renewed last summer when SRS Crisafulli's Australian Dealers, Bill Kelly and Andrew Cochran, made a visit to the factory in Glendive.  Over a few beers and dinner at the Lion's Club A-Frame in Makoshika Park, we discussed Dredging Solutions' successes using Geotubes to dredge and dewater sludge from wastewater treatment lagoons. Feeding the Geotubes with their Crisafulli Flump dredge system, Dredging Solutions has accomplished biosolids of >25%.

Crisafulli FLUMP Dredge System

Geotube drain field

4" Severe Duty Flump, CRS Polymer Dosing Systems, Geotube® Dewatering Containers
In South Australia, Dredging & Dewatering of Sewage Lagoons

Bill Kelly explained the art of the Geotubes in his fine Aussie manner.  In particular, Bill emphasized the science of chemical conditioning regimes to flocculate the sludge.  We had homework to do - we're a mechanical engineering outfit, not chemical engineers. 

Crisafulli dredge systems have been installed in over 30 wastewater treatment facilities, including most recently an award winning system at Natchez, Mississippi, as well as the Wastewater Treatment plants in places such as Lompoc Regional WWTP, California, the Douglas County Sewer in Zephyr Cove, Nevada, the City of Mandan, North Dakota, and the City of Bozeman, Montana.  

The communitites of Glendive and West Glendive - here in rural Eastern Montana - have 90 acres currently in lagoons, and the communities are in the process of evaluating how to address the current and future wastewater needs. 

You can't blame us for wondering if we could be of any assistance to local public works departments.

We turned to Rosa-lee Cooke, Water/Wastewater Instructor at the Mountain Empire Community College, Big Stone Gap, Virginia, who offers an online curriculum in Water and Wastewater Treatment Technology, and an Associate in Applied Science Degree with a Water/Wastewater Specialization for some background. 

"In theory and at the chemical level, coagulation and flocculation is a three step process consisting of flash mixing, coagulation and flocculation.  The primary purpose of the coagulation/flocculation process is the removal of turbidity from the water.  Water with little or no turbidity will be clear."

"The end product of a well-regulated coagulation/flocculation process is water in which the majority of the turbidity has been collected into floc, which is clumps of bacteria and particulate impurities that have come together and formed a cluster."

Time for the bucket demonstration:

  1. We collected buckets of sludge from the West Glendive sewage lagoon.
    SRS Crisafulli geotube demo

  2. We vigorously mixed the sludge.
    SRS Crisafulli Geotube demo

  3. Gregg Lebster prepared a selection of coagulant chemicals to add to the sludge.
    SRS Crisafulli geotube demo

  4. We mixed the coagulant with the sludge to create floc - which was then poured through a small geotube fabric sample. 
    SRS Crisafulli geotube demo
    Dan Kramer, from Montana Rural Water Systems, Great Falls, Montana inspected Gregg's floc, and the clear water that had separated from the sludge.

  5. Later in the day, we repeated the demonstration at the fire hall.  Our improvisations resulted in a small geotube - held here by Ed Trainer, Geotube marine and coastline market manager, filled with fresh floc.
    SRS Crisafulli Geotube demo

We hear from people in the field that many communitities are being encouraged to build mechanical plants;  we also hear that mechanical plants are both labor and energy intensive, and that the passive, non-energy intensive lagoon system may yet have more useful lives.

Coagulation and flocculation

To read more, please see Rosa-Lee Cooke's Lesson 4, Coagulation and Flocculation, Mountain Empire Community College.

To read more about the proposed improvements to the Glendive wastewater infrastructure:

Great West Engineering West Glendive Public Works Wastewater Treatment Plant Presentation, and, City of Glendive, Public Meeting Presentation, April 26, 2011, Wastewater System Improvements.

Topics: wastewater treatment plant, sludge, flocculation, coagulation, sewage lagoon