Scale ControlScale Control

Made simple Made simple

Photo taken after pipe was filled with Struv-Free

solution half way for 24 hrs.

Typical struvite growth

- Essential components of Struvite are generally Essential components of Struvite are generally available in most wastewater.available in most wastewater.

- Struvite forms in digesters, centrate lines, Struvite forms in digesters, centrate lines, turbulent flow areas, pipes, tanks, valves, turbulent flow areas, pipes, tanks, valves, centrifuges, etc.centrifuges, etc.

- Struvite is very stable and immune to Struvite is very stable and immune to breakdown with strong acids, strong bases, breakdown with strong acids, strong bases, chelant, and oxidizers.chelant, and oxidizers.

- Options for removal have been primarily Options for removal have been primarily physical breaking and chipping. Equipment and physical breaking and chipping. Equipment and pipe replacement has been the common and pipe replacement has been the common and very costly solution. very costly solution.

Struv-Free ST-2520Struv-Free ST-2520

ST-2520 is a specially formulated product designed ST-2520 is a specially formulated product designed to remove to remove ‘‘struvitestruvite’’ (magnesium ammonium (magnesium ammonium

phosphate) deposits which form in wastewater phosphate) deposits which form in wastewater treatment facilities.treatment facilities.

ST-2520 is a mild product which is easy to use and ST-2520 is a mild product which is easy to use and safe safe

to apply. With an application ratio of 1.5 – 2 moles of to apply. With an application ratio of 1.5 – 2 moles of ST-2520 to 1 mole of struvite it has proven to remove ST-2520 to 1 mole of struvite it has proven to remove deposits in lines and tanks within hours. deposits in lines and tanks within hours. Furthermore, used in PPM (parts per million) range, Furthermore, used in PPM (parts per million) range,

ST2520 can inhibit formation of Struvite. ST2520 has ST2520 can inhibit formation of Struvite. ST2520 has proven to be safe on all substrates encountered, proven to be safe on all substrates encountered, including equipment, valves, pipes, seals, etc.including equipment, valves, pipes, seals, etc.

Physical PropertiesPhysical Properties

►TypeType Mildly Acidic Mildly Acidic CleanerCleaner

►ColorColor Light StrawLight Straw►DensityDensity RangeRange 1.22 – 1.261.22 – 1.26►Flash PointFlash Point NoneNone►pHpH RangeRange 3.00 ± 0.53.00 ± 0.5

ST-2520 TestST-2520 TestThe following test shows that Struvite can be The following test shows that Struvite can be

effectively removed in placeeffectively removed in placewith a safe and efficient cleaning solution.with a safe and efficient cleaning solution.

We start with and then proceed to We start with and then proceed to eliminate the Struvite in this eliminate the Struvite in this experiment (as shown in the following experiment (as shown in the following photos) with 1 initial chemical addition photos) with 1 initial chemical addition and 1 interim chemical addition (to and 1 interim chemical addition (to control pH and concentration). This control pH and concentration). This results in taking the Struvite brick results in taking the Struvite brick from  41 grams to 1 gram within an 8 from  41 grams to 1 gram within an 8 hour period.hour period.

TIME pH WEIGHT

0:00 4.2 41.6

2.00 4.95 22.9

3.00 4.8 16.45

4.50 4.7 11.45

6.50 4.81 4

8.50 4.85 1

Challenges of Scale in Oilfield Challenges of Scale in Oilfield

- Essential components of well-scale are Essential components of well-scale are naturally occurring and also process added.naturally occurring and also process added.

- Scale forms readily and is a persistent Scale forms readily and is a persistent issue.issue.

- Scale has been treated with strong acids, Scale has been treated with strong acids, strong bases, chelant, and oxidizers. strong bases, chelant, and oxidizers. These have serious issues for safety and These have serious issues for safety and corrode the valuble infrastructure. corrode the valuble infrastructure. Equipment and pipe replacement has been Equipment and pipe replacement has been the common and very costly solution. the common and very costly solution.

- Safe to apply and use.Safe to apply and use.- Rapidly dissolves well-bore scale, corrosion Rapidly dissolves well-bore scale, corrosion

by products such as rust.by products such as rust.- Is not exothermic when applied. Is not exothermic when applied. - Does not donate chlorides and salts to the Does not donate chlorides and salts to the

effluent.effluent.- Safe to the infrastructure including pipes, Safe to the infrastructure including pipes,

seals, pumps. seals, pumps. - Non hazardous and non-DOT regulated.Non hazardous and non-DOT regulated.

Eco-Blast Physical PropertiesEco-Blast Physical Properties

►TypeType Mildly Acidic Mildly Acidic CleanerCleaner

►ColorColor Clear - Light StrawClear - Light Straw►DensityDensity RangeRange 1.18 – 1.211.18 – 1.21►Flash PointFlash Point NoneNone►pHpH RangeRange 3.0 ± 0.53.0 ± 0.5►Freeze Point Freeze Point 20° F.20° F.

Scaled up Well-Bore PipeScaled up Well-Bore Pipe

Pipe sample from a well, removed due to total scale fouling

Clean Well-Bore PipeClean Well-Bore Pipe

Well –Bore Pipe after soaking in 50% Eco-Blast for 20 minutes

Struv-Free & Eco-BlastStruv-Free & Eco-Blast

WWW.SULFREE.NET

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800-369-8056 800-369-8056