Change search
Link to record
Permanent link

Direct link
Pettersson, Anita
Publications (10 of 24) Show all publications
Hosseinian, A., Pettersson, A., Ylä-Mella, J. & Pongrácz, E. (2023). Phosphorus recovery methods from secondary resources, assessment of overall benefits and barriers with focus on the Nordic countries. Journal of Material Cycles and Waste Management
Open this publication in new window or tab >>Phosphorus recovery methods from secondary resources, assessment of overall benefits and barriers with focus on the Nordic countries
2023 (English)In: Journal of Material Cycles and Waste Management, ISSN 1438-4957, E-ISSN 1611-8227Article in journal (Refereed) Published
Abstract [en]

Phosphorus (P) recovery and recycling play a crucial role in improving resource efficiency, sustainable nutrient management and moving toward circular economy. Increasing demand for fertilizers, signs of geopolitical constraints, and high discharge of P to waterbodies are the other reasons to pursue the circularity of P. Various research have been carrying out and several processes have been developed for P-recovery from different resources. However, there is still a huge unexplored potential for P-recovery specially in the regional framework from the four main P-rich waste resources: food waste, manure, mining waste, and sewage sludge. This study reviews recovery methods of P from these secondary resources comprehensively. Additionally, it analyzes the Nordic viewpoint of P-cycle by evaluating Nordic reserves, demands, and secondary resources to gain a systematic assessment of how Nordic countries could move toward circular economy of P. Results of this study show that secondary resources of P in Nordic countries have the potential of replacing mineral fertilizer in these countries to a considerable extent. However, to overcome the challenges of P-recovery from studied resources, policymakers and researchers need to take decisions and make innovation along each other to open the new possibilities for Nordic economy.

Place, publisher, year, edition, pages
Springer, 2023
Keywords
Circular economy, Critical raw material, Nordic countries, Phosphorous, Recycling, Fertilizers, Mineral resources, Minerals, Phosphorus, Critical raw materials, Overall benefit, Phosphorus recovery, Recovery methods, Resource assessments, Secondary resources, Sewage sludge
National Category
Environmental Sciences
Identifiers
urn:nbn:se:hb:diva-30263 (URN)10.1007/s10163-023-01747-z (DOI)001023876900001 ()2-s2.0-85164500483 (Scopus ID)
Available from: 2023-08-15 Created: 2023-08-15 Last updated: 2024-02-01Bibliographically approved
Vali, N., Combres, A., Hosseinian, A. & Pettersson, A. (2023). The Effect of the Elemental Composition of Municipal Sewage Sludge on the Phosphorus Recycling during Pyrolysis, with a Focus on the Char Chemistry—Modeling and Experiments. Separations, 10(1), Article ID 31.
Open this publication in new window or tab >>The Effect of the Elemental Composition of Municipal Sewage Sludge on the Phosphorus Recycling during Pyrolysis, with a Focus on the Char Chemistry—Modeling and Experiments
2023 (English)In: Separations, E-ISSN 2297-8739, Vol. 10, no 1, article id 31Article in journal (Refereed) Published
Abstract [en]

The present study investigates how the original sewage sludge characteristics influence the composition of sewage sludge-based chars for land applications. Sewage sludge from two different wastewater treatment plants in Sweden was pyrolyzed at 500, 700, and 900 °C, and the resulting chars were analyzed. Thermodynamic equilibrium calculations (TEC), together with chemical fractionation, were implemented to simulate the char after the pyrolysis process at different temperatures. The results showed that, in general, for both the municipal sewage sludge (MSS), phosphorus (P) was significantly retained in the char at various temperatures. However, no specific correlation could be found between the pyrolysis temperature and the amount of P remaining. With regard to the heavy metals removed from the char after the pyrolysis reaction, the concentrations of copper, chromium, lead, nickel, zinc, and cadmium were below the limits of the Swedish regulations for farmland application.

 

  

Keywords
pyrolysis, phosphorous recovery, char, municipal sewage sludge, thermodynamics equilibrium calculations, heavy metals, waste recycling, chemical fractionations
National Category
Energy Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-29504 (URN)10.3390/separations10010031 (DOI)000927236100001 ()2-s2.0-85146785858 (Scopus ID)
Available from: 2023-03-03 Created: 2023-03-03 Last updated: 2024-02-01Bibliographically approved
Kharrazi, S. M., Soleimani, M., Jokar, M., Richards, T., Pettersson, A. & Mirghaffari, N. (2021). Pretreatment of lignocellulosic waste as a precursor for synthesis of high porous activated carbon and its application for Pb (II) and Cr (VI) adsorption from aqueous solutions. International Journal of Biological Macromolecules, 180, 299-310
Open this publication in new window or tab >>Pretreatment of lignocellulosic waste as a precursor for synthesis of high porous activated carbon and its application for Pb (II) and Cr (VI) adsorption from aqueous solutions
Show others...
2021 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 180, p. 299-310Article in journal (Refereed) Published
Abstract [en]

Effects of Elm tree sawdust pretreatments using alkali and alkaline earth metals (NaCl, KCl, CaCl2, MgCl2 and Elm tree ash) and deashing solutions (water, HCl, HNO3 and aqua regia) before the carbonization process on the porosity of produced activated carbons and Pb (II) and Cr (VI) adsorption were studied. The activated carbons were characterized by pore size distribution, surface area, FTIR, and SEM-EDX analysies. Based on the results, HCl leaching pretreatment of the biomass increased the activated carbon adsorption capacity of Cr (VI) from 114 to 190 mg g−1. The treatment of biomass with alkali and alkali earth metal salts, especially MgCl2, remarkably increased the activated carbon adsorption capacity of Pb (II) from 233 to 1430 mg g−1. The results indicated that Pb (II) adsorption was attributed to both the mesoporous structure of activated carbon and the abundance of Mg on the activated carbon's surface. On the other hand, the micropores played a major role in Cr (VI) adsorption capacity. The development of the micro- or mesoporous structure of activated carbons through pretreatment of lignocellulosic precursor could be an approach for providing high performance activated carbons for Pb (II) and Cr (VI) removal from aqueous solutions.

Place, publisher, year, edition, pages
Elsevier, 2021
Keywords
Chemical activation, Elm tree, Heavy metals
National Category
Environmental Sciences
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-25921 (URN)10.1016/j.ijbiomac.2021.03.078 (DOI)000649643500013 ()33737183 (PubMedID)2-s2.0-85102625569 (Scopus ID)
Available from: 2021-07-09 Created: 2021-07-09 Last updated: 2021-07-13Bibliographically approved
Vali, N., Åmand, L.-E., Combres, A., Richards, T. & Pettersson, A. (2021). Pyrolysis of municipal sewage sludge to investigate char and phosphorous yield together with heavy-metal removal—experimental and by thermodynamic calculations. Energies, 14(5), Article ID 1477.
Open this publication in new window or tab >>Pyrolysis of municipal sewage sludge to investigate char and phosphorous yield together with heavy-metal removal—experimental and by thermodynamic calculations
Show others...
2021 (English)In: Energies, E-ISSN 1996-1073, Vol. 14, no 5, article id 1477Article in journal (Refereed) Published
Abstract [en]

Sewage sludge is regarded as a potential source for soil fertilizer However, the direct utilization of sewage sludge in agricultural land is restricted since it also contains heavy metals, pathogens, and toxic compounds. Pyrolysis of the sewage sludge destroys the organic pollutants and partly volatilizes the heavy metals. In this study, pyrolysis of sewage sludge was carried out in order to determine the optimum residence time and temperature to recover the phosphorous and remove heavy metals from the resultant sewage sludge char (SSC). Pyrolysis was conducted on dried sewage sludge (DSS) by means of thermogravimetric analysis (TGA) and high-temperature oven with an N2-atmosphere. Microwave Plasma-Atomic Emission Spectroscopy (MP-AES) was used to determine the concentration of P and trace elements in the resulting solid char fraction. A combination of chemical fractionation (step-by-step leaching) of the DSS and thermodynamic equilibrium calculations were utilized to estimate the availability of phosphorous and removal of heavy metals in the SSC fraction at different temperatures. The results from the thermodynamics calculation were in line with the measured chemical composition of the SSC. Furthermore, the energy contents of the SSC obtained at different temperatures were measured. The pyrolysis evaluation results indicate that phosphorous was enriched in the char, while lead, zinc, and cadmium were significantly removed.

Keywords
Chemical fractionation, Phosphorus recovery, Pyrolysis, Sewage sludge, Thermodynamic equilibrium modeling, Agricultural robots, Atomic emission spectroscopy, Heavy metals, Organic pollutants, Phosphorus, Thermogravimetric analysis, Trace elements, Chemical compositions, Dried sewage sludge, Heavy metal removal, Municipal sewage sludge, Thermodynamic calculations, Thermodynamic equilibrium calculation, Thermodynamics calculations, Atmospheric temperature
National Category
Energy Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-25948 (URN)10.3390/en14051477 (DOI)000628159600001 ()2-s2.0-85106217062 (Scopus ID)
Available from: 2021-07-09 Created: 2021-07-09 Last updated: 2023-08-28
Nordin, A., Strandberg, A., Elbashir, S., Åmand, L.-E., Skoglund, N. & Pettersson, A. (2020). Co-Combustion of Municipal Sewage Sludge and Biomass in a Grate Fired Boiler for Phosphorus Recovery in Bottom Ash. Energies, 13(7)
Open this publication in new window or tab >>Co-Combustion of Municipal Sewage Sludge and Biomass in a Grate Fired Boiler for Phosphorus Recovery in Bottom Ash
Show others...
2020 (English)In: Energies, E-ISSN 1996-1073, Vol. 13, no 7Article in journal (Refereed) Published
Abstract [en]

Phosphorus has been identified as a critical element by the European Union and recycling efforts are increasingly common. An important phosphorus-containing waste stream for recycling is municipal sewage sludge (MSS), which is used directly as fertilizer to farmland. However, it contains pollutants such as heavy metals, pharmaceutical residues, polychlorinated bi-phenyls (PCBs) and nano-plastics. The interest in combustion of MSS is continuously growing, as it both reduces the volume as well as destroys the organic materials and could separate certain heavy metals from the produced ashes. This results in ashes with a potential for either direct use as fertilizer or as a suitable feedstock for upgrading processes. The aim of this study was to investigate co-combustion of MSS and biomass to create a phosphorus-rich bottom ash with a low heavy metal content. A laboratory-scale fixed-bed reactor in addition to an 8 MWth grate-boiler was used for the experimental work. The concentration of phosphorus and selected heavy metals in the bottom ashes were compared to European Union regulation on fertilizers, ash application to Swedish forests and Swedish regulations on sewage sludge application to farmland. Element concentrations were determined by ICP-AES complemented by analysis of spatial distribution with SEM-EDS and XRD analysis to determine crystalline compounds. The results show that most of the phosphorus was retained in the bottom ash, corresponding to 9-16 wt.% P2O5, while the concentration of cadmium, mercury, lead and zinc was below the limits of the regulations. However, copper, chromium and nickel concentrations exceeded these standards.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
sewage sludge; grate boiler; heavy metals; phosphorus recovery; co-combustion
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:hb:diva-24856 (URN)10.3390/en13071708 (DOI)000537688400177 ()2-s2.0-85082858906 (Scopus ID)
Available from: 2021-01-21 Created: 2021-01-21 Last updated: 2023-08-28Bibliographically approved
Usino, D., Supriyanto, S., Ylitervo, P., Pettersson, A. & Richards, T. (2020). Influence of temperature and time on initial pyrolysis of cellulose and xylan. Journal of Analytical and Applied Pyrolysis, Volume 147(104782)
Open this publication in new window or tab >>Influence of temperature and time on initial pyrolysis of cellulose and xylan
Show others...
2020 (English)In: Journal of Analytical and Applied Pyrolysis, ISSN 0165-2370, E-ISSN 1873-250X, Vol. Volume 147, no 104782Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to investigate the effects of temperature and reaction time on the primary pyrolysis of cellulose and xylan. Fast pyrolysis of cellulose and xylan was carried out with a micropyrolyser connected to a gas chromatograph-mass spectrometer/flame ionisation detector (GC–MS/FID) to separate and identify volatile components, both qualitatively and quantitatively. This set-up meant a minimum amount of secondary reactions, low impact of the heating period and at the same time provided rapid and accurate analyses. The two biomass components investigated were: cellulose and hemicellulose (represented by xylan). They were pyrolysed during 0.5, 1, 2 and 5 s (s) and within a temperature range of 400–600 °C. The results showed that levoglucosan (1, 6-anhydro β-D-glucopyranose) is the main chemical compound released during cellulose pyrolysis. It increased with increasing temperature and time. The main volatile compounds produced from pyrolysis of xylan are: 1-hydroxy-2-butanone, 4-hydroxy-5, 6-dihydro-(2 H)-pyran-2-one, 1-hydroxy-2-propanone (acetol), acetaldehyde and hydroxyacetaldehyde (HAA). HAA was the most abundant chemical compound released during xylan pyrolysis, increasing with higher temperatures and time. Acetol and acetaldehyde also showed similar behaviour. The chemical compounds released from cellulose and xylan fast pyrolysis are primary products and assumed to be produced directly from both cellulose and xylan molecules and not from secondary degradation. In this study, possible reaction routes during biomass primary pyrolysis are also suggested based on the product distribution from the thermal decomposition of cellulose and xylan.

Keywords
Fast pyrolysis, Primary reactions, Py-GC-MS/FID, Cellulose, Xylan
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-23155 (URN)10.1016/j.jaap.2020.104782 (DOI)000523305000007 ()2-s2.0-85079271304 (Scopus ID)
Available from: 2020-04-24 Created: 2020-04-24 Last updated: 2023-08-31Bibliographically approved
Tchoffor, P., Moradian, F., Pettersson, A., Kent, D. & Thunman, H. (2016). Influence of Fuel Ash Characteristics on the Release of Potassium, Chlorine, and Sulfur from Biomass Fuels under Steam-Fluidized Bed Gasification Conditions. Energy & Fuels, 30, 10435-10442
Open this publication in new window or tab >>Influence of Fuel Ash Characteristics on the Release of Potassium, Chlorine, and Sulfur from Biomass Fuels under Steam-Fluidized Bed Gasification Conditions
Show others...
2016 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 30, p. 10435-10442Article in journal (Refereed) Published
Abstract [en]

Steam-fluidized bed gasification of biomass, which produces combustible gases from which transportation fuels can be synthesized, is a promising option for replacing the use of fossil fuels in the transportation sector. Similar to other thermal conversion processes, the release of potassium (K), chlorine (Cl), and sulfur (S) from biomass fuels to the gas phase during this process may be conducive to ash-related problems. Catalytic tar and char conversion by K has also been observed. In addition to operational conditions, the extent to which these elements are released to the gas phase may be affected by fuel ash characteristics such as the ash composition and the speciation (or association) of ash-forming elements in the fuel matrix. In the present work, the influence of these fuel ash characteristics on the extent to which K, Cl, and S are released from biomass fuels to the gas phase was studied under steam-fluidized bed gasification. The aim was to assess whether these fuel ash characteristics provide information that could be useful in making a quick judgment as to what extent K, Cl, and S would be released to the gas phase. To this end, the release of K, Cl, and S from forest residues and wheat straw during devolatilization and steam gasification of the char was quantified in a laboratory-scale bubbling fluidized bed reactor. The speciation of these elements in the virgin fuels was studied with chemical fractionation. The results reveal that the extent to which S is released from biomass fuels to the gas phase mainly depends on its speciation in the fuel matrix. While both the ash composition (mainly the Cl/K molar ratio) of the fuel and the speciation of K in the fuel matrix are relevant for the release of K, they appear to be unimportant with respect to the release of Cl.

National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11484 (URN)10.1021/acs.energyfuels.6b01470 (DOI)000390072900044 ()2-s2.0-85006427532 (Scopus ID)
Available from: 2016-12-16 Created: 2016-12-16 Last updated: 2021-11-25Bibliographically approved
Persson, N.-K., Baghaei, B., Bashir, T., Brorström, B., Hedegård, L., Carlson Ingdahl, T., . . . Åkesson, D. (2016). Re: en ny samhällssektor spirar. Borås: Högskolan i Borås
Open this publication in new window or tab >>Re: en ny samhällssektor spirar
Show others...
2016 (Swedish)Report (Other academic)
Abstract [sv]

Resurser och hållbarhet är nära förknippade. Hållbarhet innebär att hushålla med resurser - materiella, miljömässiga och mänskliga. Och hushållning är per definition kärnan i ekonomi. Man börjar alltmer se framväxten av en hel arsenal av verktyg och förhållnings- och angreppssätt för att bygga hållbarhet. Detta förenas av ett synsätt att det som hitintills setts  om avfall och värdelöst, och rent utav besvärligt att ta hand om, nu blir en värdefull resurs. Det glömda och gömda kommer åter. Faktum är att många ord och begrepp kring detta börjar på just åter- eller re- . Internationellt talar man om Redesign, Recycling, Remake, Recycle, Recraft, Reuse, Recreate, Reclaim, Reduce, Repair, Refashion.

Vad är då allt detta? Ja, vill man dra det långt, är det inte mindre än framväxten av ett nyvunnet sätt att tänka, ja av en ny samhällssektor, en bransch och en industri,  sammanbundet av filosofin att återanvändningen, spillminskningen, vidarebruket, efterlivet anses som viktiga faktorer för ett miljömedvetet samhälle. Re: blir paraplytermen för detta. I denna antologi av forskare från skilda discipliner vid Högskolan i Borås lyfts ett antal av dessa begrepp inom Re: fram.

Place, publisher, year, edition, pages
Borås: Högskolan i Borås, 2016. p. 80
Series
Vetenskap för profession: rapport, ISSN 1654-6520 ; 37
National Category
Other Social Sciences
Identifiers
urn:nbn:se:hb:diva-10004 (URN)978-91-88269-22-5 (ISBN)978-91-88269-23-2 (ISBN)
Available from: 2016-06-09 Created: 2016-06-09 Last updated: 2018-08-20Bibliographically approved
Moradian, F., A. Tchoffor, P., O. Davidsson, K., Pettersson, A. & Backman, R. (2016). Thermodynamic equilibrium prediction of bed agglomeration tendency in dual fluidized-bed gasification of forest residues. Fuel processing technology, 154
Open this publication in new window or tab >>Thermodynamic equilibrium prediction of bed agglomeration tendency in dual fluidized-bed gasification of forest residues
Show others...
2016 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 154Article in journal (Refereed) Published
Abstract [en]

Dual fluidized-bed (DFB) gasification is one of the recently developed technologies for production of heat, power, transportation fuels and synthetic chemicals through steam gasification of biomass. Bed agglomeration is a serious ash-related problem that should be taken into account when biomass-based fuels are selected for fluidized-bed gasification and combustion. This study developed a thermodynamic equilibrium model to assess the risk of bed agglomeration in gasification and combustion reactors of a DFB gasifier using biomass (forest residues) as feedstock. The modelling approach combined thermodynamic equilibrium calculations with chemical fractionation technique to predict the composition and melting behaviour of the fuel-derived ash as well as bed particles coating layer in the gasification and combustion reactors. FactSage was employed for the thermodynamic equilibrium calculations. The modelling results were then compared with experimental data obtained from a full-scale DFB gasifier to estimate the reliability and validity of the predictive model. In general, a good agreement was found between the modelling results and experimental observations. For the forest residues as feedstock and olivine as bed material, the modelling results indicate a low risk of bed agglomeration in the DFB gasifier, as long as the dominant temperature in the combustion zone is below 1020 °C. In contrast, quartz as bed material in the DFB gasifier was shown to significantly increase the risk of bed agglomeration through coating-induced agglomeration mechanism. © 2016 Elsevier B.V.

Keywords
Bed agglomeration, Biomass, Chemical fractionation, Dual fluidized-bed, Thermodynamic equilibrium modelling
National Category
Chemical Process Engineering
Identifiers
urn:nbn:se:hb:diva-10727 (URN)10.1016/j.fuproc.2016.08.014 (DOI)000385321400009 ()2-s2.0-84990955144 (Scopus ID)
Available from: 2016-09-21 Created: 2016-09-21 Last updated: 2017-11-21Bibliographically approved
Moradian, F., Pettersson, A. & Richards, T. (2015). Thermodynamic Equilibrium Model Applied to Predict Fouling Tendency in a Commercial Fluidized-Bed Boiler, Combusting Solid Waste. Energy & Fuels, 29(5), 3483-3494
Open this publication in new window or tab >>Thermodynamic Equilibrium Model Applied to Predict Fouling Tendency in a Commercial Fluidized-Bed Boiler, Combusting Solid Waste
2015 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 29, no 5, p. 3483-3494Article in journal (Refereed) Published
Abstract [en]

A thermodynamic equilibrium model, combined with an advanced fuel analysis, was applied to predict the fouling tendency in a commercial bubbling fluidized-bed (BFB) boiler, combusting a mixture of solid waste. In order to enhance the performance of the model, further modifications were made, considering the combustion pattern in the fluidized-bed system and also the temperature profile in the combustion zone. The modeling was performed using Factsage, and experimental data obtained during the full-scale measurements were used as input for the model, simulating the deposit formation in the real boiler. The simulation results were then compared with the results obtained during the full-scale combustion tests to estimate the accuracy and validity of the applied model. The thermodynamic equilibrium modeling proved to be a reliable tool for predicting the fouling in the BFB boiler, thus determining the fraction of the melt in the deposited salts formed on the heat transfer surfaces during the flue gas condensation. The calculations showed that the ratio of the SO2 to alkali chloride concentration in the flue gas was the decisive factor that affected the rate of the deposit formation in the boiler. Both the simulation and the experimental results indicated that lower bed temperatures and cocombustion of P-rich fuels decrease the deposition buildup in the boiler. © 2015 American Chemical Society.

Keywords
fluidized-bed combustion, fouling, waste-derived fuels, thermodynamic equilibrium modeling
National Category
Energy Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-8526 (URN)10.1021/acs.energyfuels.5b00346 (DOI)000355158200084 ()2-s2.0-84930227296 (Scopus ID)
Available from: 2016-01-14 Created: 2016-01-14 Last updated: 2017-11-30Bibliographically approved
Organisations

Search in DiVA

Show all publications