TECHNOLOGY OF OBTAINING GRANULATED PHOSPHATE FERTILIZERS...
Transcript of TECHNOLOGY OF OBTAINING GRANULATED PHOSPHATE FERTILIZERS...
TECHNOLOGY OF OBTAINING GRANULATED
PHOSPHATE FERTILIZERS BASED ON MUNICIPAL
SEWAGE SLUDGE ASHES AND BACTERIA
BACILLUS MEGATERIUM
M A C I E J R O L E W I C Z , P I O T R R U S E K , K R Z Y S Z T O F B O R O W I K , N E W C H E M I C A L S Y N T H E S E S I N S T I T U T E I N P U Ł A W Y , P O L A N D
THE WORLD’S FERTILIZERS DEMAND
Compound 2012 2013 2014 2015 2016
N 109.9 111.6 113.1 114.5 116.0
P2O5 41.5 42.7 43.5 44.3 45.0
K2O 28.6 29.5 30.9 32.2 33.2
Total 180.0 183.8 187.5 191.0 194.2
The world’s fertilizers demand in the years of 2012-2016 (millions tones ofthe component)
Phosphate rock is not a renewable raw material
More fertilizers will be need in future
WHERE WE LOST THE PHOSPHORUS?
• municipal sewage
• industry sewage
• livestock's excrement
• phosphogypsum
• leaching from soil
BIO-FERT-P PROJECT
• 2013-2017
• The project aim is to develop new technology of phosphatefertilizers based on renewable raw materials and microbialsolubilization
• bones or meat and bone meal• ashes from incineration of sewage sludges• Bacillus megaterium
• Product with fast and slow release of fertilizers nutrients
• Study in laboratory scale and pilot scale
• Obtaining parts of products for field experiments
• Field experiments for assessing properties of obtained product
BIO-FERT-P PROJECT CONSORTIUM
Wrocław University of Technology
New Chemical Syntheses Institute in Puławy
University of Warmia and Mazury in Olsztyn
THE SCOPE OF WORK
• Verification of technology concept at pilot plant scale
• a kind of granulating agent
• an amount of granulating agent
• a selection of the phosphorus raw material mixture
• Obtaining the product for the field experiments
• Designing of installation
• Preliminary economic analysis
OBTAINING OF THE GRANULATED FERTILIZERS
• Grinding of the raw materials
• Adding the lyophilisate
• Mixing of the raw materials
• Granulation
• Drying
• Classification
• Granulating agent: dried blood• Raw materials: Ash from incineration of municipal sewage sludge
(MSSA)
QUALITY OF GRANULES
• Compressive strength• min. 10-15 N
• Abrasion resistance• > 99 % for best market products
• Granulating liquid consumption• need to evaporate
• Efficiency
• Concetration of P2O5• SSP – 18 %• DAP – 46 %• NPK – 10-20 %
RAW MATERIALS
Compound Unit MSSA
P2O5 % mass 24.7
Cd
ppm
1.23
Cr 140
Hg 0.03
Ni 64
Pb 40
The composition of the raw materials
Concentration of metals are below the Polish fertilizers standards
MSSA - municipal sewage sludge ash
A PILOT PLANT FOR FERTILIZER GRANULATION RESEARCH
A GRANULATION NODE
A GRANULATION NODE
A COMPACTOR
RESULTS – PAN GRANULATOR
Parameter Unit MSSA+ bloodMSSA + blood +
bacteria
Compressivestrength
N 92.1 99.1
Abrasionresistance
% 98.1 98.8
Consumption ofgranulating liquid
% 49 50
P2O5 total % mass 20.3 20.1
Efficiency % 88.1 87.5
Quality of obtained granules and consumption of granulating liquid
Long time of drying
MSSA - municipal sewage sludge ash
RESULTS – DRUM GRANULATOR
Parameter Unit MSSA+ bloodMSSA + blood +
bacteria
Compressivestrength
N 42.3 41.1
Abrasionresistance
% 95.7 95.8
Consumption ofgranulating liquid
% 47 46
P2O5 total % mass 20.2 20,2
Efficiency % 48.3 47.9
Quality of obtained granules and consumption of granulating liquid
Long time of drying
MSSA - municipal sewage sludge ash
INFLUENCE OF DRYING
Two types of dryer
• Belt dryer
• Drum dryer
Percent of active population of Bacillus megaterium• 105°C – 50%
• 80°C – 90%
• 60°C – 100%
RESULTS – COMPACTOR
Parameter Unit MSSA+ bloodMSSA + blood +
bacteria
Compressivestrength
N 36.5 36.4
Abrasionresistance
% 75.6 75.2
Consumption ofgranulating liquid
% 6 6
P2O5 total % mass 22.5 22,1
Efficiency % 28.9 27.6
Quality of obtained granules and consumption of granulating liquid
MSSA - municipal sewage sludge ash
High pressure decrease the population of bacteria
CONCLUSIONS
Fertilizers obtained by plate granulation process are characterized by higher
compressive strength and abrasion resistance comparing to fertilizers
obtained by compaction and drum granulation. However, this is at the
expense of decreased P2O5 content in a product and significant water
consumption during granulation process that generate the costs of drying
process.
Drying in temperature over 80°C leads to decrease of the active population
of Bacillus megaterium in fertilizer.
ACKNOWLEDGEMENTS
This project is financed in the framework of grant PBS 2/A1/11/2013 entitled: „Phosphorus renewable raw
materials - aresource base for new generation of fertilizers”attributed by the National Center for Research
and Development.