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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Acid Plant Database  May 24, 2016


Owner Mosaic Company
Mosaic Fertilizer Company

Mosaic-Logo.gif (2654 bytes)

Background Formerly
- Gardinier Inc.
- Cargill Fertilizer Inc.
Location 8813 US-41 South
Riverview, Florida
USA  33569
Website www.mosaicco.com
Plant Riverview Facility
Plant No. 7 Plant No. 8 Plant No. 9

27º 51' 39" N, 82º 23' 23" W

27º 51' 40" N, 82º 23' 20" W

27º 51' 43" N, 82º 23' 23" W

Type of Plant Sulphur Burning Sulphur Burning Sulphur Burning
Gas Source Elemental Sulphur Elemental Sulphur Elemental Sulphur
Plant Capacity 3200 STPD 2700 STPD 3400 STPD
SA/DA 3/1 DA 3/1 DA 3/1 DA

SO2: 4 lb/ton, 533 lb/h (3h avg)
        3.5 lb/ton, 467 lb/h, 2044 ton/a (24h avg)
Acid Mist: 0.12 lb/ton, 16 lb/h, 70 ton/a

Opacity: < 10%

SO2: 4 lb/ton, 450 lb/h, 1971 ton/a
Acid Mist: 0.15 lb/ton, 16.9 lb/h, 73.9 ton/a

Opacity: < 10%

SO2: 4 lb/ton, 566.7 lb/h, 2482 ton/a
Acid Mist: 0.15 lb/ton, 21.3 lb/h, 93.1 ton/a

Opacity: < 10%

No. 8 and 9 Combined
SO2: 4 lb/ton, 950 lb/h, 4161 ton/a
Acid Mist: 0.15 lb/ton, 35.6 lb/h, 156 ton/a

Opacity: < 10%

Status Operating Operating Operating
Year Built 1961 1975 -
Technology  MECS  MECS MECS

Leonard Construction

 Leonard Construction  Leonard Construction
Remarks 1961 - 725 MTPD single absorption
1970's - Converted to double absorption and capacity increased to 1090 MTPD
1980's - Plant capacity increased to 1995 MTPD
1999 - Revamped to 2900 MTPD

Hydrogen Explosion
- Interpass Absorber Tower
- -
General -
References -
News May 23, 2016 -  tank of molten sulphur caught fire Monday afternoon near the Mosaic Co. plant in Riverview. 

The fire briefly shut down traffic on U.S. 41 between Madison Avenue and Gibsonton Drive. One firefighter hurt her wrist tightening a tank valve, Hillsborough County Fire Rescue said. No other injuries were reported.  The fire broke out about 3:30 p.m. inside the plant at 8814 S. U.S. Highway 41, and workers used steam to extinguish it.  The fire was contained inside the tank, officials said.  "It's no danger to the public," Mosaic spokesman Richard Gent said.

The cause of the fire was still under investigation.

October 1, 2015
- EPA and the U.S. Department of Justice announced a settlement with Mosaic Fertilizer, LLC that will ensure the proper treatment, storage, and disposal of an estimated 60 billion pounds of hazardous waste at six Mosaic facilities in Florida and two in Louisiana. The settlement resolves a series of alleged violations by Mosaic, one of the world’s largest fertilizer manufacturers, of the federal Resource Conservation and Recovery Act (RCRA), which provides universal guidelines for how hazardous waste must be stored, handled and disposed. The 60 billion pounds of hazardous waste addressed in this case is the largest amount ever covered by a federal or state RCRA settlement and will ensure that wastewater at Mosaic’s facilities is properly managed and does not pose a threat to groundwater resources.  The 60 billion pounds of hazardous waste is based on the combined amount of corrosive wastewaters that will be treated at terminal closure of the facilities. Mosaic is one of the fertilizers industry’s best performers in its ability to reduce large volumes of corrosive wastewater in its phosphogypsum stack systems. In addition to recovering valuable phosphate and other compounds, Mosaic is able to reduce terminal closure costs while ensuring that its phosphogypsum stack systems are operated in an environmentally safe manner.  Four Mosaic facilities (New Wales, Bartow, Riverview in Florida and Uncle Sam in Louisiana) will continue to produce phosphoric acid and actively utilize its phosphogypsum stack systems. Mosaic is in the closure process for the Green Bay Complex and South Pierce facility in Florida, and the Faustina facility in Louisiana. However, Faustina will continue to manufacture ammoniated fertilizer. Mosaic operated a small sulfuric acid plant at the Mulberry facility in Florida for a short time. The Mulberry sulfuric acid plant was closed around 2008 and there are no obligations regarding this site in this settlement.  Mosaic has been making major improvements at all its facilities and completed several notable projects: installation of state-of-the-art elementary neutralization units to improve the management of sulfuric acid waste streams, upgrading air scrubbers at its granulation and phosphoric acid plants, and installing automated spill and leak detection systems. All of these projects have been closely monitored by Florida Department of Environmental Protection, and Louisiana Department of Environmental Protection, who provided valuable expertise at each step of the process.

August 4, 2013
- The U.S. Environmental Protection Agency just announced that 29 areas of the country flunked its new, tighter standards for a type of air pollution called sulfur dioxide — one of the main components of smog — and one of them was in Hillsborough County.  The polluter singled out by the EPA was not a smoke-belching power plant or an industrial incinerator. It was a plant that employs 330 people to turn phosphate rocks into fertilizer. It has been doing the same job in the same spot by the Alafia River since 1928.  The owner of the plant at 8813 U.S. 41 S in Riverview is Mosaic, the biggest phosphate miner in the world. Company officials have known for two years that this was likely to happen, spokesman David Townsend said, and have been working with county and state officials on finding ways to clean up its pollution.  So far, they aren't sure what they're going to do or how much it will cost. But under EPA regulations, Townsend said, the company doesn't have to meet the new standards until 2018 — five years from its official violation notice last month.  "Mosaic will be in full compliance by the required deadline," he said.  The EPA imposed tighter standards on sulfur dioxide because of its impact on the health of children, the elderly and people with asthma and other lung diseases, agency spokeswoman Ernesta Jones said. The effects can include narrowing of the airways, making it harder to breathe.  Smog — which often shows up as a ugly ocher smudge along the horizon, like a ring around the bathtub of Tampa Bay — has long been a summertime problem in this region. Roughly half of the area's air pollution woes come from what spews out of the tailpipes of cars and trucks criss-crossing the highways and bridges.  Power plants are major contributors, too. Florida's coal and oil-fired electric power plants —including Tampa Electric's Big Bend plant and Duke's Crystal River plant — emitted 33.4 million pounds of harmful chemicals in 2009 and accounted for 68 percent of the air pollution statewide. In 2000, the EPA targeted Tampa Electric with a $15 million fine and a settlement requiring it to clean up its sulfur dioxide emissions.  Meanwhile, though, the Mosaic plant has been steadily pumping out sulfur dioxide year after year as part of its process that uses sulfuric acid to turn hard phosphate rock into water-soluble fertilizer.  The old EPA standard allowed a plant like Mosaic's to produce 140 parts per billion of sulfur dioxide, measured over 24 hours. When the state Department of Environmental Protection issued the Riverview plant its most recent air pollution permit in April 2009, that was the applicable standard, said DEP press secretary Patrick Gillespie.  But EPA officials decided that using a daylong average allowed too many polluters to emit high concentrations of sulfur dioxide over short periods of time. Even short bursts of the pollutant is bad for people's health. So in June 2010, the EPA tightened the standard to 75 parts per billion measured in one hour.  Air pollution monitors operated by the Hillsborough County Environmental Protection Commission showed one part of the county was putting out far more sulfur dioxide than any other, in violation of the new standard. It wasn't hard to find the culprit.  "The violation at this site can be overwhelmingly attributed to a single source," DEP Secretary Herschel Vinyard Jr. wrote to the EPA in 2011, pointing a finger at the Mosaic plant.  On July 26, newly sworn EPA Administrator Gina McCarthy signed a 54-page rule designating 29 areas in 16 states as failing to meet the new standard — three-fourths of them because of what the EPA called "fossil fuel combustion at power plants." But in Florida, the two areas that flunked were the one around the Mosaic plant and the area around the Rayonier Performance Fibers mill in Nassau County, near Jacksonville.  Officials from the Hillsborough EPC have been working with Mosaic to figure out what the company needs to do to fix the problem, said the EPC's Alain Watson.  Ultimately, Townsend said, "a variety of process improvements and technical adjustments will have to be made. We're confident we'll get there."

October 5, 2009
- Plymouth-based fertilizer giant Mosaic reported sharply lower profits for the first quarter amid a global sales slowdown of crop nutrients.  In a release issued after trading closed Monday, the company reported sales of $1.46 billion, or 66 percent below last year's first quarter sales of $4.32 billion. Earnings of $100.6 million for the quarter ending Aug. 31 were 92 percent below last year's $1.18 billion and amounted to 23 cents per share.  Analysts had expected earnings of 35 cents per share on sales of $1.54 billion.  Sharp increases in fertilizer costs beginning last year, along with falling prices for some key agriculture commodities and the global recession, have thrown fertilizer sales into a tailspin. Mosaic's industry rival, PotashCorp. of Saskatchewan, Inc., has scaled back its financial guidance several times this year.  Mosaic, which produces fertilizer ingredients potash and phosphate, earlier this year declined to issue guidance "until market conditions normalize" on significant aspects of its business, including potash sales volumes and selling price.  Cargill, the agribusiness titan and majority owner of Mosaic, warned in August that earnings had dropped at Mosaic. That same month, Mosaic officials said potash sales had fallen 35 to 40 percent, and phosphate sales were off 15 to 20 percent.  The company's long-term outlook remains positive because global demand for food, and thus the fertilizer needed to grow it, remains strong and rising. Projections of both population and calorie consumption show that farmers around the world must sharply increase their production to feed the planet.  "Phosphate fundamentals have improved," said James T. Prokopanko, company president and CEO. "The potash market is evolving and we expect strong demand in calendar year 2010 for both nutrients."

MTPD - Metric Tonne per Day           STPD - Short Ton per Day
MTPA - Metric Tonne per Annum      STPA - Short Ton per Annum
SA - Single Absorption
DA - Double Absorption

* Coordinates can be used to locate plant on Google Earth