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This study concerns the production of hydrogen and methane from a Food Residue Biomass (FORBI) product (Papanikola et al. in 5th international conference on sustainable waste management systems, Athens, 2017), generated from pre-sorted HFW in a CSTR and in a PABR respectively. FORBI is generated by drying and shredding the fermentable fraction of household food waste collected door-to-door in the Municipality of Halandri, Greece. Hydrogen production from FORBI through anaerobic fermentation under acidogenic mesophilic conditions was carried out using a 4 L CSTR, operated at 12 h HRT under an organic loading of 15 g TS L−1. The H2-CSTR was operated for 40 days. During the operation of H2-CSTR the production of biogas reached up to 0.1026 Lbiogas gFORBI−1 and the percentage of hydrogen in the gas up to 48.2%. The conversion of FORBI into methane was carried out through the operation of a 77 L PABR operated under mesophilic methanogenic conditions at various operating parameters (OLR, HRT, T). Two different approaches were adopted for the pre-treatment of the feedstock. For the two first phases of the experimental procedure, a liquid extraction step was carried out before feeding the bioreactor with the separated liquid fraction, while in the subsequent three phases, a whole suspension of FORBI was used as feed. The mean biogas production rate was 0.158 ± 0.02 Lbiogas gFORBI−1 and the mean methane percentage in the biogas was 67.5 ± 2.1%, in the first two phases. The mean biogas production rate was 0.519 ± 0.03 Lbiogas gFORBI−1 and the mean methane percentage in the biogas was 66 ± 2.8%, when a whole suspension of FORBI was fed to the PABR.

The challenge for facing highly increasing environmental and health problems of modern society, caused by an ever increasing industrial development and economic growth worldwide, calls for a restructuring of waste management systems , using renewable resources and low-carbon solutions in agreement with the concept of circular economy. The main point of circular economy is the use of natural resource materials in a closed-loop, leading to zero-waste generation and sustainability (Ghisellini et al., 2016; Lieder and Rashid; 2016, Sauvé et al., 2016). The main concept of the HORIZON 2020 Waste4Think project is to introduce and promote 20 eco-innovative solutions that cover the whole waste value chain. These solutions will be applied and assessed in 4 European cities: Zamudio (Basque Country, Spain); Halandri (Greece); Seveso (Italy); and Cascais (Portugal) (Waste4Think, 2015). The eco-innovative solutions will provide: IT tools, apps for citizens, educational materials and serious games, tools for citizen, changes based on economic instruments and social actions, and finally implementation, valorization and reuse of alternatives for the recovery of high-grade materials (Figure 1). &nbsp

This research work concerns the production of Hydrogen and Methane from a Food Residue Biomass (FORBI) product, generated from pre-sorted Fermentable Household Food Waste in a Continuous Stirred Tank Reactor (CSTR). FORBI is generated by drying and shredding the fermentable fraction of household food waste, collected door-to-door in the Municipality of Halandri, Greece. Hydrogen production from FORBI through anaerobic fermentation under acidogenic mesophilic conditions was carried out using a 4L CSTR (H2-CSTR), operated at 4 hr and 3 hr Hydraulic Retention Times (HRT), with a feed concentration of 15 g TS/L. Volatile fatty acids (VFAs), Total and Volatile Suspended Solids (TSS and VSS), Total and Soluble Chemical Oxygen Demand (tCOD and sCOD), Total and Dissolved Carbohydrates, pH and hydrogen content in the biogas were monitored. The H2-CSTR operated for 32 days. During its operation, the biogas productivity reached 7.78 L/d, out of which 4.13 L/d was hydrogen (60%). This corresponds to a yield of 22Lbiogas/kgFORBI. The conversion of FORBI into methane was carried out through the operation of a CSTR (CH4-CSTR) with working volume 4L (CH4-CSTR). the reactor operated under mesophilic methanogenic conditions at 20,15 and 10 days HRT and an organic loading of 15 g TS/L. TSS, VSS, tCOD, sCOD, pH, alkalinity, VFAs and methane content in the biogas were monitored. The mean methane percentage in the biogas was up to 65%, with an average biogas productivity of 0.5Lbiogas/Lreactor/day, during the optimum operational conditions. The biogas productivity corresponds to a productivity of 477 Lbiogas/kgFORBI. The experimental results obtained were used as a basis for the development of a model by using AQUASIM [1] software, which was able to adequately simulate the operation of the bioreactors. Conclusively, FORBI was proved as a suitable feedstock material both for hydrogen and methane production, resulting in high biogas yields in both cases., The data set of the publication can be accessed at: http://doi.org/10.5281/zenodo.3906241

This study concerns the production of hydrogen and methane from a Food Residue Biomass (FORBI) product [1], 11 generated from pre-sorted HFW in a CSTR and in a PABR respectively. FORBI is generated by drying and shredding 12 the fermentable fraction of household food waste collected door-to-door in the Municipality of Halandri, Greece. 13 Hydrogen production from FORBI through anaerobic fermentation under acidogenic mesophilic conditions was 14 carried out using a 4L CSTR, operated at 12 h HRT under an organic loading of 15 g TS·L-1. The H2-CSTR was 15 operated for 40 days. During the operation of H2-CSTR the production of biogas reached up to 0,1026 L biogas·g FORBI-1 16 and the percentage of hydrogen in the gas up to 48,2 %. 17 The conversion of FORBI into methane was carried out through the operation of a 77L PABR operated under 18 mesophilic methanogenic conditions at various operating parameters (OLR, HRT, T). Two different approaches were 19 adopted for the pre-treatment of the feedstock. For the two first phases of the experimental procedure, a liquid 20 extraction step was carried out before feeding the bioreactor with the separated liquid fraction, while in the subsequent 21 three phases, a whole suspension of FORBI was used as feed. The mean biogas production rate was 0,158±0,02 22 Lbiogas·gFORBI-1 and the mean methane percentage in the biogas was 67,5±2,1%, in the first two phases. The mean biogas 23 production rate was 0,519±0,03 Lbiogas·gFORBI-1 and the mean methane percentage in the biogas was 66±2,8%, when a 24 whole suspension of FORBI was fed to the PABR.

The main concept of the HORIZON 2020 Waste4Think project is to introduce and promote 20 eco-innovative solutions that cover the whole waste value chain. These solutions will be applied and assessed in 4 European cities: a) Zamudio (Basque Country, Spain); b) Halandri (Greece); c) Seveso (Italy); and d) Cascais (Portugal) (Waste4Think, 2015). The eco-innovative solutions will provide: IT tools, apps for citizens, educational materials and serious games, tools for citizen, changes based on economic instruments and social actions, and finally implementation, valorization and reuse of alternatives for the recovery of high-grade materials., The data set of the publication can be accessed at: http://doi.org/10.5281/zenodo.3906241

The challenge for facing highly increasing environmental and health problems of modern society, caused by an ever increasing industrial development and economic growth worldwide, calls for a restructuring of waste management systems , using renewable resources and low-carbon solutions in agreement with the concept of circular economy. The main point of circular economy is the use of natural resource materials in a closed-loop, leading to zero-waste generation and sustainability (Ghisellini et al., 2016; Lieder and Rashid; 2016, Sauvé et al., 2016). The main concept of the HORIZON 2020 Waste4Think project is to introduce and promote 20 eco-innovative solutions that cover the whole waste value chain. These solutions will be applied and assessed in 4 European cities: Zamudio (Basque Country, Spain); Halandri (Greece); Seveso (Italy); and Cascais (Portugal) (Waste4Think, 2015). The eco-innovative solutions will provide: IT tools, apps for citizens, educational materials and serious games, tools for citizen, changes based on economic instruments and social actions, and finally implementation, valorization and reuse of alternatives for the recovery of high-grade materials (Figure 1)., {"references":["http://uest.ntua.gr/athens2017/proceedings/pdfs/Athens2017_Papadopoulou_Lyberatos_Lizarraga_Torre_etal.pdf"]}

This research work concerns the production of Hydrogen and Methane from a Food Residue Biomass (FORBI) product, generated from pre-sorted Fermentable Household Food Waste in a Continuous Stirred Tank Reactor (CSTR). FORBI is generated by drying and shredding the fermentable fraction of household food waste, collected door-to-door in the Municipality of Halandri, Greece. Hydrogen production from FORBI through anaerobic fermentation under acidogenic mesophilic conditions was carried out using a 4L CSTR (H2-CSTR), operated at 4 hr and 3 hr Hydraulic Retention Times (HRT), with a feed concentration of 15 g TS/L. Volatile fatty acids (VFAs), Total and Volatile Suspended Solids (TSS and VSS), Total and Soluble Chemical Oxygen Demand (tCOD and sCOD), Total and Dissolved Carbohydrates, pH and hydrogen content in the biogas were monitored. The H2-CSTR operated for 32 days. During its operation, the biogas productivity reached 7.78 L/d, out of which 4.13 L/d was hydrogen (60%). This corresponds to a yield of 22Lbiogas/kgFORBI. The conversion of FORBI into methane was carried out through the operation of a CSTR (CH4-CSTR) with working volume 4L (CH4-CSTR). the reactor operated under mesophilic methanogenic conditions at 20,15 and 10 days HRT and an organic loading of 15 g TS/L. TSS, VSS, tCOD, sCOD, pH, alkalinity, VFAs and methane content in the biogas were monitored. The mean methane percentage in the biogas was up to 65%, with an average biogas productivity of 0.5Lbiogas/Lreactor/day, during the optimum operational conditions. The biogas productivity corresponds to a productivity of 477 Lbiogas/kgFORBI. The experimental results obtained were used as a basis for the development of a model by using AQUASIM [1] software, which was able to adequately simulate the operation of the bioreactors. Conclusively, FORBI was proved as a suitable feedstock material both for hydrogen and methane production, resulting in high biogas yields in both cases.

This study concerns the production of hydrogen and methane from a Food Residue Biomass (FORBI) product [1], 11 generated from pre-sorted HFW in a CSTR and in a PABR respectively. FORBI is generated by drying and shredding 12 the fermentable fraction of household food waste collected door-to-door in the Municipality of Halandri, Greece. 13 Hydrogen production from FORBI through anaerobic fermentation under acidogenic mesophilic conditions was 14 carried out using a 4L CSTR, operated at 12 h HRT under an organic loading of 15 g TS·L-1. The H2-CSTR was 15 operated for 40 days. During the operation of H2-CSTR the production of biogas reached up to 0,1026 L biogas·g FORBI-1 16 and the percentage of hydrogen in the gas up to 48,2 %. 17 The conversion of FORBI into methane was carried out through the operation of a 77L PABR operated under 18 mesophilic methanogenic conditions at various operating parameters (OLR, HRT, T). Two different approaches were 19 adopted for the pre-treatment of the feedstock. For the two first phases of the experimental procedure, a liquid 20 extraction step was carried out before feeding the bioreactor with the separated liquid fraction, while in the subsequent 21 three phases, a whole suspension of FORBI was used as feed. The mean biogas production rate was 0,158±0,02 22 Lbiogas·gFORBI-1 and the mean methane percentage in the biogas was 67,5±2,1%, in the first two phases. The mean biogas 23 production rate was 0,519±0,03 Lbiogas·gFORBI-1 and the mean methane percentage in the biogas was 66±2,8%, when a 24 whole suspension of FORBI was fed to the PABR., The data set of the publication can be accessed at: http://doi.org/10.5281/zenodo.3906241

The scope of the present research work was to evaluate the potential of valorizing a biomass product (FORBI, Food Residue Biomass) through thermal and mechanical treatment for the production of a solid fuel (pellets). FORBI is generated through a drying/shredding process of door-to-door source-separated Household Food Waste (HFW). The quality of pellets depends on two general factors: 1.the characteristics of the raw material (FORBI) itself, directly related to its chemical composition 2.the operative variables of the pelletization process, which influence the physical and mechanical properties of the pellets produced. A suitable combination of these two factors is necessary to obtain a qualified energy product. The European Union has established standards, guidelines and thresholds for solid biofuels in order that they can be properly used and marketed as renewable fuels.

Valorization of a Food Residue Biomass product in a two-stage anaerobic digestion system for the production of hythane, The data set of the publication can be accessed at: http://doi.org/10.5281/zenodo.3906241

Valorization of a Food Residue Biomass product in a two-stage anaerobic digestion system for the production of hythane

The scope of the present research work was to evaluate the potential of valorizing a biomass product (FORBI, Food Residue Biomass) through thermal and mechanical treatment for the production of a solid fuel (pellets). FORBI is generated through a drying/shredding process of door-to-door source-separated Household Food Waste (HFW). The quality of pellets depends on two general factors: 1.the characteristics of the raw material (FORBI) itself, directly related to its chemical composition 2.the operative variables of the pelletization process, which influence the physical and mechanical properties of the pellets produced. A suitable combination of these two factors is necessary to obtain a qualified energy product. The European Union has established standards, guidelines and thresholds for solid biofuels in order that they can be properly used and marketed as renewable fuels., The data set of the publication can be accessed at: http://doi.org/10.5281/zenodo.3906241