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 69) Show all publications
Bátori, V., Åkesson, D., Zamani, A., Taherzadeh, M. J. & Sárvári Horváth, I. (2018). Anaerobic degradation of bioplastics: A review. Waste Management, 80, 406-413
Open this publication in new window or tab >>Anaerobic degradation of bioplastics: A review
Show others...
2018 (English)In: Waste Management, Vol. 80, p. 406-413Article in journal (Refereed) Published
Abstract [en]

Anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW), leading to renewableenergy production in the form of methane, is a preferable method for dealing with the increasing amountof waste. Food waste is separated at the source in many countries for anaerobic digestion. However, thepresence of plastic bags is a major challenge for such processes. This study investigated the anaerobicdegradability of different bioplastics, aiming at potential use as collecting bags for the OFMSW. Thechemical composition of the bioplastics and the microbial community structure in the AD processaffected the biodegradation of the bioplastics. Some biopolymers can be degraded at hydraulic retentiontimes usually applied at the biogas plants, such as poly(hydroxyalkanoate)s, starch, cellulose and pectin,so no possible contamination would occur. In the future, updated standardization of collecting bags forthe OFMSW will be required to meet the requirements of effective operation of a biogas plant.

Keywords
Anaerobic digestion, Biodegradation, Bioplastics, Food waste, Methane, Plastic bags
National Category
Environmental Biotechnology
Identifiers
urn:nbn:se:hb:diva-15152 (URN)10.1016/j.wasman.2018.09.040 (DOI)2-s2.0-85054156950 (Scopus ID)
Available from: 2018-10-04 Created: 2018-10-04 Last updated: 2019-01-25Bibliographically approved
Patinvoh, R., Lundin, M., Taherzadeh, M. J. & Sárvári Horváth, I. (2018). Dry Anaerobic Co-Digestion of Citrus Wastes with Keratin and Lignocellulosic Wastes: Batch And Continuous Processes. Waste and Biomass Valorization
Open this publication in new window or tab >>Dry Anaerobic Co-Digestion of Citrus Wastes with Keratin and Lignocellulosic Wastes: Batch And Continuous Processes
2018 (English)In: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265XArticle in journal (Refereed) Published
Abstract [en]

Dry anaerobic co-digestion of citrus wastes (CW) with chicken feather (CF), wheat straw (WS) and manure bedded with straw (MS) was investigated in batch and continuous processes. Experiments were designed with different mixing ratios considering the inhibitory effect of CW, C/N ratio, and total solid content of individual feedstocks. Best mixing ratio (CF:CW:WS:MS) of 1:1:6:0, enhanced methane yield by 14% compared to the expected yield calculated according to the methane yields obtained from the individual fractions. The process performance of this mixture was then investigated in continuous plug flow reactors at different organic loading rates (OLR) with feedstock total solid contents of 21% TS (RTS21) and 32% TS (RTS32). At OLR of 2 gVS/L/d, a methane yield of 362 NmlCH4/gVSadded was obtained from RTS21, which is 13.5% higher than the yield obtained from RTS32 (319 NmlCH4/gVSadded). However, it was not possible to achieve a stable process when the OLR was further increased to 3.8 gVS/L/d; there were increased total VFAs concentrations and a decline in the biogas production.

Place, publisher, year, edition, pages
Springer Netherlands, 2018
Keywords
Solid wastes, Dry co-digestion, Batch process, Continuous process, Process performance
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-15640 (URN)10.1007/s12649-018-0447-y (DOI)2-s2.0-85053541114 (Scopus ID)
Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-07
Wainaina, S., Mohsen, P., Mahboubi, A., Sárvári Horváth, I. & Taherzadeh, M. J. (2018). Food waste-derived volatile fatty acids platform using an immersed membrane bioreactor. Bioresource Technology, Article ID S0960-8524(18)31650-X.
Open this publication in new window or tab >>Food waste-derived volatile fatty acids platform using an immersed membrane bioreactor
Show others...
2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, article id S0960-8524(18)31650-XArticle in journal (Refereed) Published
Abstract [en]

Volatile fatty acids (VFAs) are the key intermediates from anaerobic digestion (AD) process that can be a platform to synthesize products of higher value than biogas. However, some obstacles still exist that prevent large-scale production and application of VFAs, key among them being the difficulty in recovering the acids from the fermentation medium and low product yields. In this study, a novel anaerobic immersed membrane bioreactor (iMBR) with robust cleaning capabilities, which incorporated frequent backwashing to withstand the complex AD medium, was designed and applied for production and in situ recovery of VFAs. The iMBR was fed with food waste and operated without pH control, achieving a high yield of 0.54 g VFA/g VSadded. The continuous VFA recovery process was investigated for 40 days at OLRs of 2 gVS/L/d and 4 gVS/L/d without significant change in the permeate flux at a maximum suspended solids concentration of 31 g/L.

Keywords
Food waste, Fouling control, Immersed membrane bioreactor, In situ recovery, Volatile fatty acids
National Category
Engineering and Technology
Research subject
Resource Recovery; Resource Recovery
Identifiers
urn:nbn:se:hb:diva-15420 (URN)10.1016/j.biortech.2018.11.104 (DOI)2-s2.0-85057618430 (Scopus ID)
Available from: 2018-12-04 Created: 2018-12-04 Last updated: 2018-12-27Bibliographically approved
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)000427593900015 ()2-s2.0-85021321465 (Scopus ID)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2019-11-18Bibliographically 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)000417046100012 ()28651875 (PubMedID)2-s2.0-85021202351 (Scopus ID)
Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2018-11-28Bibliographically 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
Patinvoh, R., Osalie, A., Chandolias, K., Sarvari Horvath, I. & Taherzadeh, M. (2017). Innovative Pretreatment Strategies for Biogas Production. Bioresource Technology, 224, 13
Open this publication in new window or tab >>Innovative Pretreatment Strategies for Biogas Production
Show others...
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 224, p. 13-Article in journal (Refereed) Published
Abstract [en]

Biogas or biomethane is traditionally produced via anaerobic digestion, or recently bythermochemical or a combination of thermochemical and biological processes viasyngas (CO and H2) fermentation. However, many of the substrates feedstocks haverecalcitrant structure and difficult to digest (e.g., lignocelluloses or keratins), or theyhave toxic compounds (such as fruit flavors or high ammonia content), or not digestibleat all (e.g., plastics). To overcome these challenges, innovative strategies for enhancedand economically favorable biogas production were proposed in this review. Thestrategies considered are commonly known physical pretreatment, rapid decompression,autohydrolysis, acid- or alkali pretreatments, solvents (e.g. for lignin or cellulose)pretreatments or leaching, supercritical, oxidative or biological pretreatments, as well ascombined gasification and fermentation, integrated biogas production and

Keywords
Biogas, Pretreatment strategies, Lignocellulosic residue, Syngas, Fruit and Food waste, Keratin waste
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11167 (URN)10.1016/j.biortech.2016.11.083 (DOI)000395691900002 ()2-s2.0-85006507481 (Scopus ID)
Available from: 2016-11-23 Created: 2016-11-23 Last updated: 2019-10-10Bibliographically 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)000419607700005 ()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: 2018-11-30Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1456-1840

Search in DiVA

Show all publications