Struvite Removal articles

On the vivianite-laden heat exchangers, the maintenance supervisor created a recirculation circuit and diluted JS 9325 to a fifty percent (50%) solution. They recirculated the diluted solution for 48 hours while raising the temperature of the solution to 110F. Upon opening the first heat exchanger, they observed a purple solution following by a half-inch (½”) sheet of vivianite scales popping off the surface of the heat exchanger. They made up another solution and repeated the cleaning cyc

A regional wastewater treatment plant in Sonoma County was experiencing problems with struvite on their screw presses and vivianite on their heat exchangers. The design plant flow rate is 7.9 mg/day. They were using 7 mg/L to 10 mg/L (dry basis) of ferric chloride to control hydrogen sulfide and improve solids removal in the primary clarifier. The plant maintenance staff was forced to shut down the dewatering process every three (3) weeks to clean because of struvite deposits on the screen of

Are you getting a scale build up in your recirculation system from your manure holding ponds (lagoons)? Is it calcium carbonate or struvite (magnesium-ammonia-phosphate) crystals? In some CAFO sites, they will use anaerobic lagoons to reduce the amount of manure that they need to treat. In a zero oxygen environment the anaerobic bacteria will take the manure which is loaded with nutrients and further digest it to generate methane, hydrogen sulfide, ammonia, phosphate and other mineral salts (

A wastewater treatment plant near Flagstaff, AZ was experiencing problems with keeping their belt aligned on the belt press. The belt press was in operation 4 days per week for 6 hours per day. The flow rate was 150 gallons per minute (gpm). Upon close inspection of the belt press system, the maintenance staff observed scale deposits on the rollers, pan and filtrate lines. Samples were taken for analysis. The lab report indicated that the scale deposits were composed of magnesium, ammonia and

Based on the lab supervisor’s recommendation, the plant ordered two 55 gallon drums of JS 9325 for a plant trial on the screw press. They set up a spray system to meter JS 9325 on the outer surface of the screw press. During the first five (5) days of the struvite removal trial, plant operations noticed that the openings on the screens were getting cleaner. They reduced the cleaning cycle from continuous spraying to 30 minutes of spraying at the end of operations each day. Plant operations

Struvite formation occurs when magnesium, ammonium and phosphate hexahydrate whose elemental composition of magnesium ammonia and phosphate forms in water combine in the exact chemical formulation as expressed by equation Mg2+ + NH4+ + HPO42- + 2H2O MgNH4PO4•6H2O + H+.

This is the chemical term and formulation for struvite.

This article goes over how Struvite is formed, the parameters for formation, the prediction of it, and ultimately how to remove and prevent it from ever occu

The three chemical components for Struvite formation are magnesium, ammonia and phosphorus, also known as MAP for short. Struvite’s chemical formula is NH4MgPO4·6H2O. WWTP managers have used a number of different products and techniques for Struvite removal, and to prevent Struvite formation. Most text books on Struvite control talk about the use of ferric chloride (FeCl3) to control Struvite formation, however it can cause many more problems including corrosion, and the formatio

A regional wastewater treatment plant in Sonoma County was experiencing problems with struvite on their screw presses and vivianite on their heat exchangers.The plant maintenance staff was forced to shut down the dewatering process every three (3) weeks to clean because of struvite deposits on the screen of the screw press. They also noticed that they were having a difficult time maintaining the temperature in the anaerobic digester and discovered vivianite scale in the heat exchangers.

There is an alternative method for removing struvite that is much easier to administer and control than mechanical grinding and spraying. Struvite Remover is a liquid solution, environmentally safe product that has proven itself to remove struvite effectively, efficiently and cost friendly. Struvite Remover is very effective with struvite removal and struvite wastewater treatment. Struvite Remover will safely attack and dissolve the struvite crystal (rock) by targeting the magnesium component

CAFOs (Confined Animal Feeding Operations) face struvite in their manure holding ponds and manure lagoons, as well as their recirculation systems. On a dairy farm in Neb. that operated with 15,000 milking cows, they were generating 500,000 gal per day of wastewater laden with manure.  Over the summer, they noticed a reduction in their pumping capacity because the first lagoon was filling faster than they could pump.  On a closer examination, they found scale. Struvite Remover i