IDENTIFICATION OF PRODUCTS OF CONTINUOUS CRYSTALLIZATION PROCESS USED TO RECOVER

PHOSPHATE(V) IONS FROM WASTEWATERS DERIVED FROM MINERAL FERTILIZER INDUSTRY

OR ANIMAL BREEDING

PhD Eng. Anna Kozik

Faculty of ChemistryWroclaw University of Technology

WORLD RESERVES OF PHOSPHATE ROCKS

China39%

6%

United States

Brazil2% South Africa

9%

Russia

Israel

Other

1%

Jordan

1%

5%

3%

http://www.ied.ethz.ch/newsletter/newsletter8/research/research/phosphor

Morocco/ W. Sahara

34%

2

WORLD PHOSPHATE ROCK PRODUCTION AND DEMAND

http://www.potashcorp.com/industry_overview/2011/nutrients/23/

Production DemandMillion Tonnes Product – 2010

North America

Europe

Middle East

Latin America

Asia

Oceania

Africa

FSU

Non – Intregrated Producers*

Intregrated Producers

26,232,1

26,2

10,68,3

43,1

26,8

13,4

12,9 82,3

0,9

8,39,9

5,9

2,4 3,2

*Includes imports and domestic sales

Source: Fertecon, PotashCrop

73,5

3

Intended aim of the Project

is identification of the effect of chemical composition of wastewaters containing phosphate(V) ions and parameters of continuous reaction crystallization of struvite, on the product quality, its physical form, chemical composition and phase composition, as well as on the process kinetics: nucleation rate and linear crystal growth rate of the required component of the product – MAP.

Scientific aim of the Project:

Identification of physicochemical and kinetic basis

of a new technology for continuous recovery

of useful forms of phosphorus from mineral fertilizer

industry and animal breeding wastewaters.

Investigated process concerns chemical separation

of sparingly soluble phosphate(V) salt – struvite,

MAP, MgNH4PO4∙6H2O.

OBJECTIVES OF THE PROJECT

4

PHOTOS OF EXPERIMENTAL PLANT (BIOENGINEERING RALF PLUS SOLO) FOR CONTINUOUS REACTION CRYSTALLIZATION OF STRUVITE: a) general view, b) laboratory continuous DT MSMPR crystallizer unit with internal circulation of suspension

a

b

5