Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Modelling of a sulfate reducing and metal recovery process, for application within treatment of industrial wastewater

Broberg, Kristina LU (2019) KBTM05 20182
Biotechnology (MSc)
Abstract (Swedish)
Denna masteruppsats syftar till utvecklandet av en industriellt, fullskalig modell över en vattenreningsprocess som syftar till simultan sulfatreduktion och tungmetallåtervinning från processvatten vid gruvdrift. Den mängd sulfat som finns tillgänglig i lakvattnet, omvandlas till vätesulfid med hjälp av sulfatreducerande bakterier (SRB). Tungmetallerna återvinns genom selektiv utfällning med hjälp av den vätesulfid som bildats av SRB.

Två modeller av processen har tagits fram, en baserad på mjukvaran SuperPro och den andra baserad på Matlab. SuperPro-modellen utvecklades kring en stökiometrisk bioreaktor medan Matlab-modellen utvecklats kring differentialekvationer som tar hänsyn till reaktionskinetiken. SuperPro-modellen genererade... (More)
Denna masteruppsats syftar till utvecklandet av en industriellt, fullskalig modell över en vattenreningsprocess som syftar till simultan sulfatreduktion och tungmetallåtervinning från processvatten vid gruvdrift. Den mängd sulfat som finns tillgänglig i lakvattnet, omvandlas till vätesulfid med hjälp av sulfatreducerande bakterier (SRB). Tungmetallerna återvinns genom selektiv utfällning med hjälp av den vätesulfid som bildats av SRB.

Två modeller av processen har tagits fram, en baserad på mjukvaran SuperPro och den andra baserad på Matlab. SuperPro-modellen utvecklades kring en stökiometrisk bioreaktor medan Matlab-modellen utvecklats kring differentialekvationer som tar hänsyn till reaktionskinetiken. SuperPro-modellen genererade konsekventa och upprepningsbara resultat som överensstämde med indata. Matlab-modellen genererade precis som SuperPro-modellen konsekventa resultat, om än något oväntade – speciellt gällande den låga konsumtionen av acetat i modellen som innehöll båda substraten.

Framtida rekommendationer för detta projekt är vidareutveckling av dessa två modeller. SuperPro-modellen utvecklas bäst genom validering mot experimentell data samt genom införandet av en kinetiskt baserad bioreaktor istället för den nuvarande stökiometriska. Matlab-modellen behöver vidareutveckling främst inom kopplingarna mellan de beskrivande differentialekvationerna för modellens olika processteg. (Less)
Abstract
This thesis treats the development of an industrial scale models of a wastewater treatment process aiming at reducing the sulfate and heavy metal concentration in the effluent water from mining processes. The sulfate present in the process water is reduced using sulfate reducing bacteria (SRB) while the heavy metals are recovered through selective precipitation using the hydrogen sulfide produced by the SRB. Development of efficient treatment processes of both municipal, and maybe especially for industrial wastewaters such as leachate are an important step towards ensuring a future water supply for both the industry as well as for everyday consumers.

Two models of the process has been developed, one in the software SuperPro and another... (More)
This thesis treats the development of an industrial scale models of a wastewater treatment process aiming at reducing the sulfate and heavy metal concentration in the effluent water from mining processes. The sulfate present in the process water is reduced using sulfate reducing bacteria (SRB) while the heavy metals are recovered through selective precipitation using the hydrogen sulfide produced by the SRB. Development of efficient treatment processes of both municipal, and maybe especially for industrial wastewaters such as leachate are an important step towards ensuring a future water supply for both the industry as well as for everyday consumers.

Two models of the process has been developed, one in the software SuperPro and another using the software Matlab. The SuperPro model was developed using a stoichiometric fermenter as its bioreactor whereas the Matlab model takes the kinetics of the bioreactor into consideration. The SuperPro model generated results that were consistent with the input data. The Matlab model on the other hand, did not display the correct Monod kinetic on the graphs generated when solving the differential equations.

The future steps of this project is to further develop the models. The SuperPro model needs to be validated against experimental results, and developed using a kinetic reactor instead of the current stoichiometric one. The Matlab model is in need of further development of the connection between the mass balances in the different steps of the process. (Less)
Popular Abstract
Resource efficiency is becoming increasingly attractive from both an economical and sustainable perspective. The developed process models help the mining industry to become more resource efficient, emitting less polluted water and recovering previously wasted metal ions.
Please use this url to cite or link to this publication:
author
Broberg, Kristina LU
supervisor
organization
course
KBTM05 20182
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Biotechnology, Wastewater treatment, Process modelling, Bioprocess technology, Sulfate reducing bacteria, Metal sulfides, Simulation, Matlab, SuperPro Designer, Bioteknik
language
English
id
8969195
date added to LUP
2019-02-22 15:16:44
date last changed
2019-02-22 15:16:44
@misc{8969195,
  abstract     = {{This thesis treats the development of an industrial scale models of a wastewater treatment process aiming at reducing the sulfate and heavy metal concentration in the effluent water from mining processes. The sulfate present in the process water is reduced using sulfate reducing bacteria (SRB) while the heavy metals are recovered through selective precipitation using the hydrogen sulfide produced by the SRB. Development of efficient treatment processes of both municipal, and maybe especially for industrial wastewaters such as leachate are an important step towards ensuring a future water supply for both the industry as well as for everyday consumers. 

Two models of the process has been developed, one in the software SuperPro and another using the software Matlab. The SuperPro model was developed using a stoichiometric fermenter as its bioreactor whereas the Matlab model takes the kinetics of the bioreactor into consideration. The SuperPro model generated results that were consistent with the input data. The Matlab model on the other hand, did not display the correct Monod kinetic on the graphs generated when solving the differential equations. 

The future steps of this project is to further develop the models. The SuperPro model needs to be validated against experimental results, and developed using a kinetic reactor instead of the current stoichiometric one. The Matlab model is in need of further development of the connection between the mass balances in the different steps of the process.}},
  author       = {{Broberg, Kristina}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Modelling of a sulfate reducing and metal recovery process, for application within treatment of industrial wastewater}},
  year         = {{2019}},
}