{"type": "FeatureCollection", "features": [{"id": "10.1016/j.ijbiomac.2018.12.270", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:36Z", "type": "Journal Article", "created": "2019-01-03", "title": "Improving polyhydroxyalkanoates production in phototrophic mixed cultures by optimizing accumulator reactor operating conditions", "description": "Open AccessPolyhydroxyalkanoates (PHAs) production with phototrophic mixed cultures (PMCs) has been recently proposed. These cultures can be selected under the permanent presence of carbon and the PHA production can be enhanced in subsequent accumulation steps. To optimize the PHA production in accumulator reactors, this work evaluated the impact of 1) initial acetate concentration, 2) light intensity, 3) removal of residual nitrogen on the culture performance. Results indicate that low acetate concentration (&lt;30CmM) and specific light intensities around 20W/gX are optimal operating conditions that lead to high polyhydroxybutyrate (PHB) storage yields (0.83+-0.07 Cmol-PHB/Cmol-Acet) and specific PHB production rates of 2.21+-0.07 Cmol-PHB/Cmol X d. This rate is three times higher than previously registered in non-optimized accumulation tests and enabled a PHA content increase from 15 to 30% in less than 4h. Also, it was shown for the first time, the capability of a PMC to use a real waste, fermented cheese whey, to produce PHA with a hydroxyvalerate (HV) content of 12%. These results confirm that fermented wastes can be used as substrates for PHA production with PMCs and that the energy levels in sunlight that lead to specific light intensities from 10 to 20W/gX are sufficient to drive phototrophic PHA production processes.", "keywords": ["0106 biological sciences", "1303 Biochemistry", "Light", "Nitrogen", "Polyhydroxyalkanoates (PHA)", "Fermented cheese whey (FCW)", "Phototrophic mixed cultures (PMCs)", "Acetates", "7. Clean energy", "01 natural sciences", "1315 Structural Biology", "Bioreactors", "Cheese", "Whey", "1312 Molecular Biology", "0105 earth and related environmental sciences", "Polyhydroxyalkanoates", "Volatile fatty acids (VFAs)", "Other Quantitative Biology (q-bio.OT)", "Quantitative Biology - Other Quantitative Biology", "Purple phototrophic bacteria (PPB)", "Kinetics", "Phototrophic Processes", "13. Climate action", "FOS: Biological sciences", "Fermentation"]}, "links": [{"href": "https://doi.org/10.1016/j.ijbiomac.2018.12.270"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/International%20Journal%20of%20Biological%20Macromolecules", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ijbiomac.2018.12.270", "name": "item", "description": "10.1016/j.ijbiomac.2018.12.270", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ijbiomac.2018.12.270"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-04-01T00:00:00Z"}}, {"id": "10.1021/acs.est.1c03586", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:17:29Z", "type": "Journal Article", "created": "2021-11-02", "title": "Impact of Periodic Polarization on Groundwater Denitrification in Bioelectrochemical Systems.", "description": "Nitrate contamination is a common problem in groundwater around the world. Nitrate can be cathodically reduced in bioelectrochemical systems using autotrophic denitrifiers with low energy investment and without chemical addition. Successful denitrification was demonstrated in previous studies in both microbial fuel cells and microbial electrolysis cells (MECs) with continuous current flow, whereas the impact of intermittent current supply (e.g., in a fluidized-bed system) on denitrification and particularly the electron-storing capacity of the denitrifying electroactive biofilms (EABs) on the cathodes have not been studied in depth. In this study, two continuously fed MECs were operated in parallel under continuous and periodic polarization modes over 280 days, respectively. Under continuous polarization, the maximum denitrification rate reached 233 g NO3--N/m3/d with 98% nitrate removal (0.6 mg NO3--N/L in the effluent) with negligible intermediate production, while under a 30 s open-circuit/30 s polarization mode, 86% of nitrate was removed at a maximum rate of 205 g NO3--N/m3/d (4.5 mg NO3--N/L in the effluent) with higher N2O production (6.6-9.3 mg N/L in the effluent). Conversely, periodic polarization could be an interesting approach in other bioelectrochemical processes if the generation of chemical intermediates (partially reduced or oxidized) should be favored. Similar microbial communities dominated byGallionellaceaewere found in both MECs; however, swapping the polarization modes and the electrochemical analyses suggested that the periodically polarized EABs probably developed a higher ability for electron storage and transfer, which supported the direct electron transfer pathway in discontinuous operation or fluidized biocathodes.", "keywords": ["bioelectrochemical systems (BESs)", "periodic polarization", "Autotrophic Processes", "Technology and Engineering", "denitrification", "Nitrates", "AUTOTROPHIC DENITRIFICATION", "EABs", "Bioelectric Energy Sources", "NITRATE-CONTAMINATED GROUNDWATER", "02 engineering and technology", "6. Clean water", "REDUCTION", "REMOVAL", "13. Climate action", "Earth and Environmental Sciences", "BACTERIA", "ACETATE", "Denitrification", "MICROBIAL FUEL-CELLS", "ELECTRON-TRANSFER", "BIOFILM", "0210 nano-technology", "Groundwater", "STORAGE"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.1c03586"}, {"href": "https://doi.org/10.1021/acs.est.1c03586"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acs.est.1c03586", "name": "item", "description": "10.1021/acs.est.1c03586", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.1c03586"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-11-02T00:00:00Z"}}, {"id": "10.1155/2019/1751783", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:19:18Z", "type": "Journal Article", "created": "2019-05-02", "title": "Acetotrophic Activity Facilitates Methanogenesis from LCFA at Low Temperatures: Screening from Mesophilic Inocula", "description": "<p>The inoculum source plays a crucial role in the anaerobic treatment of wastewaters. Lipids are present in various wastewaters and have a high methanogenic potential, but their hydrolysis results in the production of long chain fatty acids (LCFAs) that are inhibitory to anaerobic microorganisms. Screening of inoculum for the anaerobic treatment of LCFA-containing wastewaters has been performed at mesophilic and thermophilic conditions. However, an evaluation of inocula for producing methane from LCFA-containing wastewater has not yet been conducted at low temperatures and needs to be undertaken. In this study, three inocula (one granular sludge and two municipal digester sludges) were assessed for methane production from LCFA-containing synthetic dairy wastewater (SDW) at low temperatures (10 and 20\uffc2\uffb0C). A methane yield (based on mL-CH4/g-CODadded) of 86-65% with acetate and 45-20% with SDW was achieved within 10 days using unacclimated granular sludge, whereas the municipal digester sludges produced methane only at 20\uffc2\uffb0C but not at 10\uffc2\uffb0C even after 200 days of incubation. The acetotrophic activity in the inoculum was found to be crucial for methane production from LCFA at low temperatures, highlighting the role ofMethanosaeta(acetoclastic archaea) at low temperatures. The presence of bacterial taxa from the familySyntrophaceae(Syntrophusand uncultured taxa) in the inoculum was found to be important for methane production from SDW at 10\uffc2\uffb0C. This study suggests the evaluation of acetotrophic activity and the initial microbial community characteristics by high-throughput amplicon sequencing for selecting the inoculum for producing methane at low temperatures (up to 10\uffc2\uffb0C) from lipid-containing wastewaters.</p>", "keywords": ["Deltaproteobacteria", "0301 basic medicine", "570", "0303 health sciences", "Sewage", "218 Environmental engineering", "Microbiota", "116 Chemical sciences", "Fatty Acids", "Temperature", "116", "Acetates", "Methanosarcinales", "6. Clean water", "03 medical and health sciences", "218", "13. Climate action", "11. Sustainability", "Anaerobiosis", "Methane", "Research Article"]}, "links": [{"href": "https://doi.org/10.1155/2019/1751783"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Archaea", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1155/2019/1751783", "name": "item", "description": "10.1155/2019/1751783", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1155/2019/1751783"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-05-02T00:00:00Z"}}, {"id": "10.3390/ma12020270", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:21:02Z", "type": "Journal Article", "created": "2019-01-16", "title": "Improved Impact Properties in Poly(lactic acid) (PLA) Blends Containing Cellulose Acetate (CA) Prepared by Reactive Extrusion", "description": "<p>Poly(lactic acid)/triacetine plasticized cellulose acetate (PLA/pCA) blends were prepared by extrusion at two different temperatures and tetrabutylammonium tetraphenyl borate (TBATPB) was added as a transesterification catalyst to reactively promote the formation of PLA-CA copolymer during the reactive extrusion. The occurrence of chain scission in the PLA phase and branching/crosslinking in the CA phase in the presence of TBATPB, resulting also in a darkening of the material, were demonstrated by studying torque measurements and by performing proper thermogravimetric tests on CA with the different additives. Tensile and impact tests onto the blends prepared at the lower temperature showed better properties than the ones obtained at a higher temperature. Then, the mechanical properties of PLA/plasticized cellulose acetate (pCA) blends prepared at the lower temperature were investigated as a function of the content of plasticized CA in the blend. A range of compositions was observed where blends exhibited improved impact properties with respect to pure PLA without a significant decrease in their elastic modulus. The study of the phase morphology of the blends revealed that the occurrence of reactive compatibilization did not significantly affect the phase distribution. In general, fibrillar CA particles were formed in the PLA matrix during extrusion, thus allowing the preparation of CA fibre reinforced composites. The trend of morphology as a function of the composition and processing conditions was then discussed by considering the evolution of phase morphology in immiscible polymer blends.</p>", "keywords": ["cellulose acetate", "13. Climate action", "impact properties", "02 engineering and technology", "0210 nano-technology", "Cellulose acetate; Impact properties; Phase morphology; Poly(lactic acid); Reactive extrusion; Materials Science (all)", "7. Clean energy", "poly(lactic acid)", " reactive extrusion", "phase morphology", "Article"]}, "links": [{"href": "http://www.mdpi.com/1996-1944/12/2/270/pdf"}, {"href": "https://arpi.unipi.it/bitstream/11568/960015/1/materials-12-00270-v2.pdf"}, {"href": "https://doi.org/10.3390/ma12020270"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Materials", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/ma12020270", "name": "item", "description": "10.3390/ma12020270", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/ma12020270"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-01-15T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ACETATE&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ACETATE&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ACETATE&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ACETATE&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-07-26T13:55:24.007223Z"}