Change search
Link to record
Permanent link

Direct link
BETA
Sárvári Horváth, IlonaORCID iD iconorcid.org/0000-0002-1456-1840
Alternative names
Publications (10 of 67) Show all publications
Pagés Díaz, J., Pereda Reyes, I., Sanz, J. L., Lundin, M., Taherzadeh, M. J. & Sárvári Horváth, I. (2017). A comparison of process performance during the anaerobic mono-and co-digestion of slaughter house waste through different operational modes. Journal of Environmental Sciences(China)
Open this publication in new window or tab >>A comparison of process performance during the anaerobic mono-and co-digestion of slaughter house waste through different operational modes
Show others...
2017 (English)In: Journal of Environmental Sciences(China), ISSN 1001-0742, E-ISSN 1878-7320Article in journal (Refereed) Accepted
Abstract [en]

The use of consecutive feeding was applied to investigate the response of the microbial biomass to a second addition of substrates in terms of biodegradation using batch tests as a promising alternative to predict the behavior of the process. Anaerobic digestion (AD) of the slaughterhouse waste (SB) and its co-digestion with manure (M), various crops (VC), and municipal solid waste were evaluated. The results were then correlated to previous findings obtained by the authors for similar mixtures in batch and semi-continuous operation modes. AD of the SB failed showing total inhibition after a second feeding. Co-digestion of the SB + M showed a significant improvement for all of the response variables investigated after the second feeding, while co-digestion of the SB + VC resulted in a decline in all of these response variables. Similar patterns were previously detected, during both the batch and the semi-continuous modes.

Keywords
Co-digestion, Biomethane potential test, Second feeding, Specific methanogenic activity, Slaughterhouse waste
National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13561 (URN)10.1016/j.jes.2017.06.004 (DOI)2-s2.0-85021321465 (Scopus ID)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-18Bibliographically approved
Wainaina, S., Sárvári Horváth, I. & Taherzadeh, M. J. (2017). Biochemicals from food waste and recalcitrant biomass via syngas fermentation: A review. Bioresource Technology
Open this publication in new window or tab >>Biochemicals from food waste and recalcitrant biomass via syngas fermentation: A review
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976Article in journal (Refereed) Published
Abstract [en]

An effective method for the production of value-added chemicals from food waste and lignocellulosic materials is a hybrid thermal-biological process, which involves gasification of the solid materials to syngas (primarily CO and H2) followed by fermentation. This paper reviews the recent advances in this process. The special focus is on the cultivation methods that involve the use of single strains, defined mixed cultures and undefined mixed cultures for production of carboxylic acids and higher alcohols. A rate limiting step in these processes is the low mass transfer between the gas and the liquid phases. Therefore, novel techniques that can enhance the gas-liquid mass transfer including membrane- and trickle-bed bioreactors were discussed. Such bioreactors have shown promising results in increasing the volumetric mass transfer coefficient (kLa). High gas pressure also influences the mass transfer in certain batch processes, although the presence of impurities in the gas would impede the process.[on SciFinder (R)]

Keywords
co-cultures, food waste, lignocelluloses, reactor design, syngas fermentation
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12538 (URN)10.1016/j.biortech.2017.06.075 (DOI)28651875 (PubMedID)2-s2.0-85021202351 (Scopus ID)
Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-12-13Bibliographically approved
Patinvoh, R., Osadolor, O. A., Sárvári Horváth, I. & Taherzadeh, M. J. (2017). Cost effective dry anaerobic digestion in textile bioreactors: Experimental and economic evaluation. Bioresource Technology, 245(Pt A), 549-555
Open this publication in new window or tab >>Cost effective dry anaerobic digestion in textile bioreactors: Experimental and economic evaluation
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 245, no Pt A, p. 549-555Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to study dry anaerobic digestion (dry-AD) of manure bedded with straw using textile-based bioreactor in repeated batches. The 90-L reactor filled with the feedstocks (22-30% total solid) and inoculum without any further treatment, while the biogas produced were collected and analyzed. The digestate residue was also analyzed to check its suitability as bio-fertilizer. Methane yield after acclimatization increased from 183 to 290NmlCH4/gVS, degradation time decreased from 136 to 92days and the digestate composition point to suitable bio-fertilizer. The results then used to carry out economical evaluation, which shows dry-AD in textile bioreactors is a profitable method of handling the waste with maximum payback period of 5years, net present value from $7,000 to $9,800,000 (small to large bioreactors) with internal rate of return from 56.6 to 19.3%.

Keywords
Dry anaerobic digestion, Textile bioreactor, Solid waste management, Digestate, Economic evaluation
National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13560 (URN)10.1016/j.biortech.2017.08.081 (DOI)000412443500069 ()28898855 (PubMedID)2-s2.0-85028966233 (Scopus ID)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-18Bibliographically approved
Patinvoh, R. J., Kalantar Mehrjerdi, A., Sarvari, H. I. & Taherzadeh, M. J. (2017). Dry fermentation of manure with straw in continuous plug flow reactor: Reactor development and process stability at different loading rates. Bioresource Technology, 224, 197-205
Open this publication in new window or tab >>Dry fermentation of manure with straw in continuous plug flow reactor: Reactor development and process stability at different loading rates
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 224, p. 197-205Article in journal (Refereed) Published
Abstract [en]

In this work, a plug flow reactor was developed for continuous dry digestion processes and its efficiency was investigated using untreated manure bedded with straw at 22% total solids content. This newly developed reactor worked successfully for 230days at increasing organic loading rates of 2.8, 4.2 and 6gVS/L/d and retention times of 60, 40 and 28days, respectively. Organic loading rates up to 4.2gVS/L/d gave a better process stability, with methane yields up to 0.163LCH4/gVSadded/d which is 56% of the theoretical yield. Further increase of organic loading rate to 6gVS/L/d caused process instability with lower volatile solid removal efficiency and cellulose degradation.[on SciFinder (R)]

Keywords
continuous process, dry fermentation, plug flow reactor, process stability, reactor development
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-11430 (URN)10.1016/j.biortech.2016.11.011 (DOI)000395691900024 ()2-s2.0-85006483288 (Scopus ID)
Note

MEDLINE AN 2017659917(Journal; Article; (JOURNAL ARTICLE))

Available from: 2016-12-14 Created: 2016-12-14 Last updated: 2018-08-02Bibliographically approved
Momayez, F., Karimi, K., Karimi, S. & Sárvári Horváth, I. (2017). Efficient hydrolysis and ethanol production from rice straw by pretreatment with organic acids and effluent of biogas plant. RSC Advances, 7(80), 50537-50545
Open this publication in new window or tab >>Efficient hydrolysis and ethanol production from rice straw by pretreatment with organic acids and effluent of biogas plant
2017 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, no 80, p. 50537-50545Article in journal (Refereed) Published
Abstract [en]

The effluent of biogas production plant was used for the pretreatment of rice straw for the improvement of ethanol production. In addition, the organic active ingredients of the effluent, i.e., acetic, butyric, lactic and propionic acids (1-4%), as well as water were employed for the pretreatment at 100 and 140 °C. The results indicated that pretreatment at 100 °C had no significant effect on the performance of subsequent enzymatic hydrolysis and ethanol production by simultaneous saccharification and fermentation (SSF). Among different types of organic acids presented in the effluent, lactic acid showed a better performance. The highest concentration of glucose and ethanol were achieved after 72 h enzymatic hydrolysis and SSF from the straw pretreated at 140 °C with 4% lactic acid. Applying the effluent for the straw pretreatment at 140 °C resulted in an increase in glucose and ethanol concentrations by 42.4 and 47.5%, respectively, compared to those from untreated samples. SEM, FTIR, BET, BJH, and compositional analyses were used to characterize the changes in the structure and composition of rice straw by the pretreatment. Changes in the straw swelling, cellulose crystallinity, pore size distribution, and composition were responsible for the acquired improvements.

National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13562 (URN)10.1039/c7ra10063a (DOI)000414405800014 ()2-s2.0-85032922247 (Scopus ID)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-18Bibliographically approved
Nair, R. B., Kabir, M. M., Lennartsson, P. R., Taherzadeh, M. J. & Sárvári Horváth, I. (2017). Integrated Process for Ethanol, Biogas, and Edible Filamentous Fungi-Based Animal Feed Production from Dilute Phosphoric Acid-Pretreated Wheat Straw. Applied Biochemistry and Biotechnology, 1-15
Open this publication in new window or tab >>Integrated Process for Ethanol, Biogas, and Edible Filamentous Fungi-Based Animal Feed Production from Dilute Phosphoric Acid-Pretreated Wheat Straw
Show others...
2017 (English)In: Applied Biochemistry and Biotechnology, ISSN 0273-2289, E-ISSN 1559-0291, p. 1-15Article in journal (Refereed) Published
Abstract [en]

Integration of wheat straw for a biorefinery-based energy generation process by producing ethanol and biogas together with the production of high-protein fungal biomass (suitable for feed application) was the main focus of the present study. An edible ascomycete fungal strain Neurospora intermedia was used for the ethanol fermentation and subsequent biomass production from dilute phosphoric acid (0.7 to 1.2% w/v) pretreated wheat straw. At optimum pretreatment conditions, an ethanol yield of 84 to 90% of the theoretical maximum, based on glucan content of substrate straw, was observed from fungal fermentation post the enzymatic hydrolysis process. The biogas production from the pretreated straw slurry showed an improved methane yield potential up to 162% increase, as compared to that of the untreated straw. Additional biogas production, using the syrup, a waste stream obtained post the ethanol fermentation, resulted in a combined total energy output of 15.8 MJ/kg wheat straw. Moreover, using thin stillage (a waste stream from the first-generation wheat-based ethanol process) as a co-substrate to the biogas process resulted in an additional increase by about 14 to 27% in the total energy output as compared to using only wheat straw-based substrates. .[on SciFinder (R)]

Keywords
bioethanol, biogas, dilute acid pretreatment, filamentous fungi, integration, n. intermedia, wheat straw
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12539 (URN)10.1007/s12010-017-2525-1 (DOI)2-s2.0-85020404803 (Scopus ID)
Note

Copyright (C) 2017 U.S. National Library of Medicine.; MEDLINE AN 2018665916(Journal; Article; (JOURNAL ARTICLE))

Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-09-22Bibliographically approved
Sárvári Horváth, I., del Pilar Castillo, M., Schnürer, A., Agnihotri, S., Ylitervo, P. & Edström, M. (2017). Utilization of Straw Pellets and Briquettes as Co-Substrates at Biogas Plants.
Open this publication in new window or tab >>Utilization of Straw Pellets and Briquettes as Co-Substrates at Biogas Plants
Show others...
2017 (English)Report (Other academic)
Abstract [en]

Biogas reactors can be utilized more efficiently when straw and food waste are digested together instead of separately. In the present study, straw in the form of pellets and briquettes has been used in experiments and calculations. Co-digestion of different substrates can give a more optimal substrate composition and a more efficient utilization of available digester volume. The pelleting and briquetting process has been shown to be an adequate pretreatment method of the straw. Digesting food waste and straw together showed synergistic effects with improved degradation of the food waste as well as a higher total volumetric methane production as compared to when food waste was used as the sole substrate. Energy produced through increased biogas production was higher than the energy needed for the pelleting and briquetting process. The positive effect in regard to gas production was mainly seen for the straw pellets, results supported by both chemical and microbiological analysis. These effects were observed in both mesophilic and thermophilic conditions. In conclusion, this study illustrates that straw is a suitable co-digestion substrate to food waste and can be used to improve gas yields as well as for more efficient utilization of the digester volume. These results show the biogas potential of straw, today not yet used as a substrate to a large extent.

Publisher
p. 58
Series
EnergiForsk REPORT 2017:438
National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13564 (URN)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-18Bibliographically approved
Patinvoh, R., Feuk-Lagerstedt, E., Lundin, M., Sárvári Horváth, I. & Taherzadeh, M. J. (2016). Biological pretreatment of chicken feather and biogas production from total broth. Applied Biochemistry and Biotechnology, 180(7), 1401-1415
Open this publication in new window or tab >>Biological pretreatment of chicken feather and biogas production from total broth
Show others...
2016 (English)In: Applied Biochemistry and Biotechnology, ISSN 0273-2289, E-ISSN 1559-0291, Vol. 180, no 7, p. 1401-1415Article in journal (Refereed) Published
Keywords
Chicken feather; Pretreatment; Bacillus substilis strain; Keratinase; Biogas production; Mesophilic; Hydrolysate; Total broth; Bacteria granules
National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13563 (URN)10.1007/s12010-016-2175-8 (DOI)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-06-14Bibliographically approved
Hashemi, S. S., Karimi, K., Nosratpour, M. J. & Sárvári Horváth, I. (2016). Efficient Biogas and Ethanol Production from Safflower Straw Using Sodium Carbonate Pretreatment. Energy & Fuels, 30(12), 10592-10601
Open this publication in new window or tab >>Efficient Biogas and Ethanol Production from Safflower Straw Using Sodium Carbonate Pretreatment
2016 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 30, no 12, p. 10592-10601Article in journal (Refereed) Published
National Category
Environmental Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11800 (URN)
Available from: 2017-01-13 Created: 2017-01-12 Last updated: 2017-05-02Bibliographically approved
Mirmohamadsadeghi, S., Karimi, K. & Sárvári Horváth, I. (2016). Improvement of Solid-State Biogas Production from Wood by Concentrated Phosphoric Acid Pretreatment. BioResources, 11(2), 3230-3243
Open this publication in new window or tab >>Improvement of Solid-State Biogas Production from Wood by Concentrated Phosphoric Acid Pretreatment
2016 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 11, no 2, p. 3230-3243Article in journal (Refereed) Published
Abstract [en]

Cellulose Solvent-And organic Solvent-Based lignocellulose fractionation (COSLIF) has been repeatedly shown to be a Cost-Effective and promising process to modify the structure of different lignocelluloses. It has been repeatedly reported to improve enzymatic hydrolysis and ethanol production from different lignocelluloses. In this study, COSLIF was used to improve biomethane production from pine (softwood), poplar (soft hardwood), and berry (hard hardwood) via solid state anaerobic digestion (SSAD). Feed to inoculum (F/I) ratio, which plays a major role in SSAD, was set to 3, 4, and 5. After the pretreatment, 39, 33, and 24% higher methane yield from pine was achieved for F/I ratios of 3, 4, and 5, respectively. However, the methane yield from the hardwoods was not improved by the pretreatment, which was related to overloading of the digester. Compositional analysis showed considerable reduction in hemicellulose and lignin content by the pretreatment. Structural changes in the woods, before and after the pretreatment, were examined by X-Ray diffractometer and scanning electron microscopy. The results showed that the crystallinity of cellulose was decreased and accessible surface area was drastically increased by the pretreatment.

Keywords
Biogas, Concentrated phosphoric acid pretreatment, Hardwood, Softwood, Solid-State anaerobic digestion
National Category
Environmental Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11796 (URN)10.15376/biores.11.2.3230-3243 (DOI)000375786700022 ()2-s2.0-84965125869 (Scopus ID)
Available from: 2017-01-13 Created: 2017-01-12 Last updated: 2017-05-02Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1456-1840

Search in DiVA

Show all publications