Diversifying the products from the organic fraction of municipal solid waste (OFMSW) by producing polyhydroxyalkanoates from the liquid fraction and biomethane from the residual solid fraction

Papa, Gabriella; Sciarria, Tommy Pepè; Scaglia, Barbara; Adani, Fabrizio

doi:10.1016/j.biortech.2021.126180

Cited by 7 publications

(2 citation statements)

References 34 publications

(46 reference statements)

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“…The aeration was provided by an air pump connected to a flow meter to adjust the flow rate, which was then spread by an air ring. It was maintained under the same conditions for 60 cycles to reach stability in the feeding regime [27]. Next, different aeration conditions, lasting 14 cycles, were studied to investigate the impact of aeration on the selection step.…”

Section: Selection and Acclimation Stagementioning

confidence: 99%

Influence of Aeration Rate on Uncoupled Fed Mixed Microbial Cultures for Polyhydroxybutyrate Production

Castagnoli,

Falcioni,

Touloupakis

et al. 2024

Sustainability

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The use of residual streams as feedstock for the production of polyhydroxyalkanoates (PHAs) is growing steadily, as it allows the valorization of waste and nutrients otherwise disposed of and the potential production of a biodegradable bioplastic. To date, the environmental and economic costs associated with this process limit its scale-up, which is why it is important to identify possible solutions and optimize the costliest steps. With this in mind, a laboratory-scale sequenced batch reactor (SBR, 5 L) was constructed to allow the selection of a mixed microbial culture able to convert volatile fatty acids (VFAs) into PHA. The reactor is fed with synthetic water containing VFAs, ammonium, phosphate, and micronutrients, typical compounds of fermented streams of certain wastes, such as cheese whey, food waste, or wastewater sludge. The biomass selected and produced by this first reactor is sent to an accumulation reactor, which is fed with a solution rich in VFAs, allowing the accumulation of PHAs. The role of aeration and its impacts on the main process parameters were analyzed. Three scenarios corresponding to different aeration rates were analyzed: 0.08, 0.16, and 0.32 vvm. The SBR was operated at an organic load rate of 600 mgCOD L−1d−1, under a dynamic feeding regime (feast–famine) and a short hydraulic retention time (HRT; 1 day). The results obtained showed that a value of 0.32 enabled better selection and better settling of the sludge. Furthermore, a potential correlation between aeration rate and VFA and NH4+ consumption rates was identified. The resulting biomass was able to accumulate up to 0.15 ± 0.02 g PHAgVSS−1.

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Section: Selection and Acclimation Stagementioning

confidence: 99%

Influence of Aeration Rate on Uncoupled Fed Mixed Microbial Cultures for Polyhydroxybutyrate Production

Castagnoli,

Falcioni,

Touloupakis

et al. 2024

Sustainability

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“…To this end, the biological processing of OFMSW appears as the most suitable solution. Recent research advances are addressing the generation of value added biochemicals [4] and energy carriers such as hydrogen [5] and hythane [6]. However, most of them are still in their infancy in terms of being proposed at industrial scale, where composting and anaerobic digestion remain the prevailing options [7].…”

Section: Introductionmentioning

confidence: 99%

Composting of Organic Solid Waste of Municipal Origin: The Role of Research in Enhancing Its Sustainability

Policastro

Cesaro

2022

IJERPH

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The organic solid waste of municipal origin stands as one of the residual streams of greatest concern: the great amounts continuously produced over time as well as its biochemical and physical characteristics require its proper handling via biological processes, pursuing the recovery of material and/or the generation of energy. At the European level, most of the industrial plants treating the organic fraction of municipal solid waste (OFMSW) rely on composting, which is a well-established and reliable process that is easy to operate in different socio-economic contexts. Nevertheless, when regarded in a life cycle perspective as well as in the view of the principles of circular economy underlying waste management, several issues (e.g., the presence of toxic substances in compost) can be recognized as technical challenges, requiring further studies to identify possible sustainable solutions. This work aims at discussing these challenges and figuring out the state of the art of composting in a circular perspective. Firstly, the main mentioned issues affecting compost quality and process sustainability are briefly reviewed. Next, to promote the effective use of composting in light of the circular economy principles, research experiences are critically presented to highlight the current technical challenges concerning the environmental and health impact reduction and possible scientific perspectives to overcome issues affecting the compost quality. Based on the critical analysis of reviewed studies, it emerged that further research should be aimed at unveiling the hazard potential of emerging contaminants as well as to address the understanding of the mechanisms underlying their potential removal during composting. Moreover, the adoption of a multidisciplinary perspective in the design of research studies may play a key role towards the definition of cost-effective and environmentally friendly strategies to overcome the technical issues affecting the process.

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Techno-economic analysis of food waste valorization for integrated production of polyhydroxyalkanoates and biofuels

Rajendran

Han

2022

Bioresource Technology

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Diversifying the products from the organic fraction of municipal solid waste (OFMSW) by producing polyhydroxyalkanoates from the liquid fraction and biomethane from the residual solid fraction

Cited by 7 publications

References 34 publications

Influence of Aeration Rate on Uncoupled Fed Mixed Microbial Cultures for Polyhydroxybutyrate Production

Influence of Aeration Rate on Uncoupled Fed Mixed Microbial Cultures for Polyhydroxybutyrate Production

Composting of Organic Solid Waste of Municipal Origin: The Role of Research in Enhancing Its Sustainability

Techno-economic analysis of food waste valorization for integrated production of polyhydroxyalkanoates and biofuels

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