Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis
Abstract BackgroundItaly can augment its profit from biorefinery products by altering the operation of digesters or different designs to obtain more precious bioproducts like volatile fatty acids (VFAs) than biogas from organic municipal solid waste. In this context, recognizi...
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JMIR Publications
2025-02-01
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| Online Access: | https://xmed.jmir.org/2025/1/e50458 |
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| author | Hojjat Borhany |
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| author_sort | Hojjat Borhany |
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Abstract
BackgroundItaly can augment its profit from biorefinery products by altering the operation of digesters or different designs to obtain more precious bioproducts like volatile fatty acids (VFAs) than biogas from organic municipal solid waste. In this context, recognizing the process stability and outputs through operational interventions and its technical and economic feasibility is a critical issue. Hence, this study involves an anaerobic digester in Treviso in northern Italy.
ObjectiveThis research compares a novel line, consisting of pretreatment, acidogenic fermentation, and anaerobic digestion, with single-step anaerobic digestion regarding financial profit and surplus energy. Therefore, a mass flow model was created and refined based on the outputs from the experimental and numerical studies. These studies examine the influence of hydraulic retention time (HRT), pretreatment, biochar addition, and fine-tuned feedstock/inoculum (FS/IN) ratio on bioproducts and operational parameters.
MethodsVFA concentration, VFA weight ratio distribution, and biogas yield were quantified by gas chromatography. A t
ResultsBoth HRTs were identical concerning the ratio of VFA/soluble chemical oxygen demand (0.88 kg/kg) and VFA weight ratio distribution: mainly, acetic acid (40%), butyric acid (24%), and caproic acid (17%). However, a significantly higher mean VFA content was confirmed for an HRT of 4.5 days than the quantity for an HRT of 3 days (30.77, SD 2.82 vs 27.66, SD 2.45 g–soluble chemical oxygen demand/L), using a tt8P443
ConclusionsThis research elaborates on the advantage of the refined novel line over the single-step anaerobic digestion and confirms its financial and technical feasibility. Further, changing the HRT and other amendments significantly raised the VFA concentration and the process kinetics and stability. |
| format | Article |
| id | doaj-art-df0254b9f9e94e69b5a0049c7bb2334b |
| institution | Kabale University |
| issn | 2563-6316 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | JMIR Publications |
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| series | JMIRx Med |
| spelling | doaj-art-df0254b9f9e94e69b5a0049c7bb2334b2025-02-11T17:16:33ZengJMIR PublicationsJMIRx Med2563-63162025-02-016e50458e5045810.2196/50458Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical AnalysisHojjat Borhanyhttp://orcid.org/0000-0001-5253-8767 Abstract BackgroundItaly can augment its profit from biorefinery products by altering the operation of digesters or different designs to obtain more precious bioproducts like volatile fatty acids (VFAs) than biogas from organic municipal solid waste. In this context, recognizing the process stability and outputs through operational interventions and its technical and economic feasibility is a critical issue. Hence, this study involves an anaerobic digester in Treviso in northern Italy. ObjectiveThis research compares a novel line, consisting of pretreatment, acidogenic fermentation, and anaerobic digestion, with single-step anaerobic digestion regarding financial profit and surplus energy. Therefore, a mass flow model was created and refined based on the outputs from the experimental and numerical studies. These studies examine the influence of hydraulic retention time (HRT), pretreatment, biochar addition, and fine-tuned feedstock/inoculum (FS/IN) ratio on bioproducts and operational parameters. MethodsVFA concentration, VFA weight ratio distribution, and biogas yield were quantified by gas chromatography. A t ResultsBoth HRTs were identical concerning the ratio of VFA/soluble chemical oxygen demand (0.88 kg/kg) and VFA weight ratio distribution: mainly, acetic acid (40%), butyric acid (24%), and caproic acid (17%). However, a significantly higher mean VFA content was confirmed for an HRT of 4.5 days than the quantity for an HRT of 3 days (30.77, SD 2.82 vs 27.66, SD 2.45 g–soluble chemical oxygen demand/L), using a tt8P443 ConclusionsThis research elaborates on the advantage of the refined novel line over the single-step anaerobic digestion and confirms its financial and technical feasibility. Further, changing the HRT and other amendments significantly raised the VFA concentration and the process kinetics and stability.https://xmed.jmir.org/2025/1/e50458 |
| spellingShingle | Hojjat Borhany Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis JMIRx Med |
| title | Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis |
| title_full | Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis |
| title_fullStr | Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis |
| title_full_unstemmed | Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis |
| title_short | Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis |
| title_sort | converting organic municipal solid waste into volatile fatty acids and biogas experimental pilot and batch studies with statistical analysis |
| url | https://xmed.jmir.org/2025/1/e50458 |
| work_keys_str_mv | AT hojjatborhany convertingorganicmunicipalsolidwasteintovolatilefattyacidsandbiogasexperimentalpilotandbatchstudieswithstatisticalanalysis |