Session 52 - Biowaste

[CEST2019_00966] Expansion of the 3T method for the assessment of various Energy-from-Waste technologies
by Vakalis S., Moustakas K., Malamis D., Loizidou M.

The term “energy from waste” refers to technologies that utilize waste streams for energy production. However, for the energy production by means of thermal treatment of non-hazardous waste it is usually the term “waste-to-energy” that is commonly used. The Waste Framework Directive 2008/98/EU separates the waste management strategies into Recovery Operations and Disposal Operations (ANNEXES I and II respectively). Waste-to-energy technologies that use waste as fuel for energy generation are considered Recovery Operations, i.e. R 1.

Session: 52, Room: D, at Sat, 09/07/2019 - 16:45 to 17:00
Oral presentation in Biowaste
[CEST2019_00913] Sewage sludge agricultural use
by Mosquera-Losada M.R., Ferreiro-Dominquez N., Arias-Martinez D., Rodriguez-Rigueiro F.J., Santiago-Freijanes J.J. ,Rigueiro-Rodriguez A.

Sewage Sludge Use In Agriculture Is Promoted By The European Union Since The Normative Of Cleaning Waters Related To The Compulsory Use Of Depuration Plants In All Cities Over 2000 Inhabitants Was Finally Implemented In 2005. The University Of Santiago De Compostela (Usc) Has Been Conducted Long-Term Experiment Research About The Application Of Different Sewage Sludge Doses In Silvopastoral Systems.

Session: 52, Room: D, at Sat, 09/07/2019 - 16:30 to 16:45
Oral presentation in Biowaste
[CEST2019_00714] Valorisation of ovine cheese whey through PHA production
by Asunis F., Brundu A.P., Carucci A., Cocco F.G., De Gioannis G., Isipato M., Muntoni A., Spiga D.

In the present study, PHA production from ovine cheese whey (oCW) through a 3-step process (dark fermentation, biomass selection and PHA accumulation process) was investigated. Different operating pHs were adopted during the fermentation step and no external nutrients were supplied at any step of the process. Results showed that the production of PHA from oCW is a promising valorisation approach.

Session: 52, Room: D, at Sat, 09/07/2019 - 16:15 to 16:30
Oral presentation in Biowaste
[CEST2019_00493] Biosolids as soil-amendment: evaluation of nutrient leaching in loamy-silty soil.
by Venegas M., Fernández G., Vidal G.

Sewage sludge (SS) is a by-product of wastewater treatment. Anaerobic digestion is a worldwide technology used in SS stabilization and pre-treatment step is used to improve its biodegradability. Once SS is stabilized they are named biosolids (BS). Biosolids composition makes them attractive as a soil amendment. But also, BS could be a source of contamination. Therefore, the objective of this study was to evaluate the nutrient leaching in loamy-silty soil of BS stabilized with conventional and advanced anaerobic digestion.

Session: 52, Room: D, at Sat, 09/07/2019 - 17:00 to 17:03
Flash presentation in Biowaste
[CEST2019_00470] Hydrothermal pretreatment optimization for enhanced anaerobic digestion of willow sawdust
by Alexandropoulou M., Papadopoulou K., Antonopoulou G., Lyberatos G.

In this study, hydrothermal pretreatment in combination with HCl, at a chemical loading of 2 g /100 g TS was carried out as a pretreatment method to enhance anaerobic digestion of willow sawdust. Regarding hydrothermal pretreatment, various temperatures (130.5-230oC) and process times (15.5 -60 min) were studied, using a Central Composite Design so as to optimize pretreatment conditions and the methane potential.

Session: 52, Room: D, at Sat, 09/07/2019 - 15:30 to 15:45
Oral presentation in Biowaste
[CEST2019_00145] Biogas production from sunflower residues: effect of pretreatment
by Spyridonidis A., Zhurka M., Vasiliadou I.A, Lytra V., Stamatelatou Κ.

Sunflower residues are a prominent substrate of renewable source for biogas production during anaerobic digestion (AD). However, due to its recalcitrant structure, pretreatment is necessary to increase its biodegradability. The objective of the present work was to evaluate the effect of the NaOH pretreatment on the methane production from sunflower residues. The residues were separated into stalks and heads after seed removal.

Session: 52, Room: D, at Sat, 09/07/2019 - 16:00 to 16:15
Oral presentation in Biowaste
[CEST2019_00129] Organic solid waste mechanical pretreatment for the optimization of anaerobic digestion processes
by Cesaro A., Cieri V., Belgiorno V.

Anaerobic digestion has been recognized as the most demanding process for the valorization of organic solid waste towards the generation of valuable intermediates, that can be converted into a methane rich-gas to meet the current needs for renewable energy. In this regard, press-extrusion has raised as a promising mechanical pretreatment to enhance methane production by increasing the organic loading rate to the digester as well as by adequately mixing the liquid and the solid fractions from this pretreatment.

Session: 52, Room: D, at Sat, 09/07/2019 - 15:45 to 16:00
Oral presentation in Biowaste