In this session - slides seminar will Pär Larshans CSO, Ragnsells share the Why we need to recover and recycle phosphorus, and how it will help with safer food production and cleaner oceans, please share.
See live presentation here, start Why to Act for the Climate and now, we have the technology! (Time in video 30.51 - 53.58 min)
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New York Pär Larshans, Ragnsells, phosphorus management
1. Pär Larshans, Chief Sustainability Office, Ragnsells Group
par.larshans@ragnsells.com
Sustainable Phosphorus Management
New York - Nordic Innovation House July 18, 2018 Live broadcast http://bit.ly/ragnsellslivenewyork
2. Phosphorus
Phosphorus is an element essential to life
• Phosphorus is an important component in RNA and DNA and is
necessary for all living cells
• Bones and teeth consist of calcium phosphate
• Phosphorus is a constituent of the ATP-molecule, which plays a
central role in energy management in all living cells
• Phosphorus is a constituent of the cell membrane
(phospholipids)
• Regulation of pH in cells is based on phosphorus
chemistry
3. 3
Global production
170 million ton rock phosphate
(apatite) year -1
International Fertilizer Association
– Statistics 2007
Mining of rock phosphate and the cadmium and
uranium issue
Cd and U content
There is a continuous decrease in world rock phosphate quality
Rock phosphate can contain up to 640 mg Cd kg-1 P and up to
1.3 g U kg-1 P
British Sulphur (1998) Phosphorus & Potassium, 217
Alloway & Steinnes (1999) Cadmium in Soils and Plants. Development in Plant and Soil Sciences 85, 110 –
113 Guzman et al. (1995) Journal of Radioanalytical and Nuclear Chemistry, 189, 2, 301-306
4. Fosfor en begränsad resurs
Phosphorus reserves and cadmium content
< 10 mg Cd kg-1 P
10 -50 mg Cd kg-1 P
>50 mg Cd kg-1 P
5. Col 2
Col 2
Fördelningen av världens brytbara fosforreserver (%)
0 10 20 30 40 50 60 70 80
Brazil
Russia
South Africa
Jordan
Syria
China
Tunesia
Israel
Egypt
USA
Other countries
Morocco and Western Sahara
<10 mg Cd kg-1 P
10-50 mg Cd kg-1 P
>50 mg Cd kg-1 P
Mineable phosphate rock and cadmium content
Estimates on mineable amounts taken from US Geological Survey (USGS, 2011) and on
cadmium contents from McLaughlin et al. (1996).
Mineable phosphate rock in relation to world reserves (%)
6. U3O8 (ppm)
Min Max
Algeria 110 140
Brasil 50 250
Egypt 70 140
Jordan 50 150
Morocco 90 160
Senegal 120 180
Syria 60 160
Togo 80 100
Tunis 30 150
US 20 300
Uranium content in rock phosphate
Chaker, 2009
85 to 90% of the uranium in rock phosphate ends up in fertilizers
7. Resumé
• Phosphate rock is a non-renewable resource.
Recycling of phosphorus is necessary within
foreseeable future
• Cadmium and uranium -depleted P reserves are
very limited
• Cadmium and uranium must be separated from
fertilizers in order to not enrich agricultural land
27. The solution:
Ash2Phos, Clean commercial phosphorus products from sludge ash
Process characteristics
•Clean well known phosphorus products (Cd< 1 mg/kg P)
•Input chemicals become part of products
•Products effective in their applications
•Simple and robust process
•Low energy consumption
•Can use waste acid
•Recovery of iron and aluminium separately
Products from the process
•Phosphorus 95% recovery
– Calcium phosphate (feed phosphates)
– Superphosphates
– Ammonium phosphate (fertilizer)
•Precipitation chemicals (iron chloride & aluminum sulfate)
•Heavy metal (disposal)
•Undissolved ash
28. Kiruna - Europes largest phosphorus reserve?
LKAB is annually producing a waste sand containing approx. 70 000 tons of phosphor and 3 000 ton rare earth metals
Foto:LKAB