A. Sotiropoulos

National Technical University of Athens

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Dimitris Malamis

Brunel University of London

ΚΜ

Κωνσταντίνος Μουστάκας

National Technical University of Athens

Stergios Vakalis

University of the Aegean

V. Panaretou

National Technical University of Athens

Maria Loizidou

National Technical University of Athens

Marco Baratieri

Free University of Bozen-Bolzano

A.G. Thanos

National Technical University of Athens

Jelica Novaković

University of Belgrade

Simos Malamis

National Technical University of Athens

K.J. Haralambous

National Technical University of Athens

Cooperative Institutions

National Technical University of Athens

Free University of Bozen-Bolzano

Foundation for Research and Technology Hellas

University of Patras

University of Ioannina

FORTH Institute of Chemical Engineering Sciences

Gheorghe Asachi Technical University of Iași

Brunel University of London

University of Verona

Consorzio Interuniversitario Nazionale La Chimica Per L'Ambiente

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Combination of decentralized waste drying and SSF techniques for household biowaste minimization and ethanol production

Waste Management (2016)

A. Sotiropoulos I. Vourka A. Erotokritou Jelica Novaković V. Panaretou

10.1016/j.wasman.2016.03.047

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Citations (24)

Assessing the removal of heavy metals in industrial wastewater by means of chemical exergy

Desalination and Water Treatment (2017)

Stergios Vakalis Κωνσταντίνος Μουστάκας Dimitios Malamis A. Sotiropoulos Simos Malamis

Industrial wastewater treatment

10.5004/dwt.2017.20588

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Citations (6)

Utilisation of biomass gasification by-products for onsite energy production

Waste Management & Research The Journal for a Sustainable Circular Economy (2016)

Stergios Vakalis A. Sotiropoulos Κωνσταντίνος Μουστάκας Dimitris Malamis Marco Baratieri

Small scale biomass gasification is a sector with growth and increasing applications owing to the environmental goals of the European Union and the incentivised policies of most European countries. This study addresses two aspects, which are at the centre of attention concerning the operation and development of small scale gasifiers; reuse of waste and increase of energy efficiency. Several authors have denoted that the low electrical efficiency of these systems is the main barrier for further commercial development. In addition, gasification has several by-products that have no further use and are discarded as waste. In the framework of this manuscript, a secondary reactor is introduced and modelled. The main operating principle is the utilisation of char and flue gases for further energy production. These by-products are reformed into secondary producer gas by means of a secondary reactor. In addition, a set of heat exchangers capture the waste heat and optimise the process. This case study is modelled in a MATLAB-Cantera environment. The model is non-stoichiometric and applies the Gibbs minimisation principle. The simulations show that some of the thermal energy is depleted during the process owing to the preheating of flue gases. Nonetheless, the addition of a secondary reactor results in an increase of the electrical power production efficiency and the combined heat and power (CHP) efficiency.

Pinch analysis

10.1177/0734242x16643178

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Citations (21)

Assessing the alteration of physicochemical characteristics in composted organic waste in a prototype decentralized composting facility

Environmental Science and Pollution Research (2019)

V. Panaretou Stergios Vakalis Aggeliki Ntolka A. Sotiropoulos Κωνσταντίνος Μουστάκας

Green waste

Biodegradable waste

Mechanical biological treatment

10.1007/s11356-019-05307-7

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Citations (18)

Thermochemical valorization and characterization of household biowaste

Journal of Environmental Management (2016)

Stergios Vakalis A. Sotiropoulos Κωνσταντίνος Μουστάκας Dimitris Malamis K. Vekkos

Torrefaction

Food Waste

Energy Recovery

Biodegradable waste

tar (computing)

Refuse-derived fuel

Resource Recovery

10.1016/j.jenvman.2016.04.017

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Citations (55)

Environmental profile of an innovative household biowaste dryer system based on Life Cycle Assessment

Waste Management & Research The Journal for a Sustainable Circular Economy (2018)

Giorgos E. Konstantzos Dimitris Malamis A. Sotiropoulos Maria Loizidou

An alternative approach to biowaste management involves the application of an innovative household dryer for the dehydration of biowaste at source, in order to significantly reduce its mass and volume, and subsequently the collection frequency. The main objective of this work is to assess the potential impacts of the system under examination, which involves the household dryer use and kerbside collection of the dehydrated residues (biomass), by conducting a Life Cycle Assessment study. The stages considered in the present study include the following: (a) the construction of the household biowaste dryer; (b) the use of the dryer and the collection of dehydrated residues; (c) the end-of-life treatment of the dryer. The results revealed that emissions coming from kerbside collection account for the vast majority of the total emissions from each category examined, apart from Terrestrial Ecotoxicity, where lignite, heavy fuel oil and diesel combustion during electricity production affect mainly this category. The potential impact in Global Warming over 100 years was estimated to be 8.87 kg CO2 eq / t biowaste. The Human Toxicity Potential was 1.86 kg 1,4-DB eq / t biowaste, Terrestrial Ecotoxicity Potential was 0.027 kg 1,4-DB eq / t biowaste, Freshwater Aquatic Ecotoxicity Potential was 0.0126 kg 1,4-DB eq / t biowaste and Marine Aquatic Ecotoxicity Potential was 521.85 kg 1,4-DB eq / t biowaste. Acidification Potential was estimated at 0.035 kg SO2 eq / t biowaste, while Eutrophication Potential was 0.0065 kg PO4- eq / t biowaste. Finally, Photochemical Oxidation Potential was 0.0014 kg C2H4 eq / t biowaste.

Ecotoxicity

10.1177/0734242x18792604

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Citations (10)

Adaptation measures for the food and beverage industry to the impact of climate change on water availability

Desalination and Water Treatment (2015)

Katerina Valta Κωνσταντίνος Μουστάκας A. Sotiropoulos Dimitris Malamis K.J. Haralambous

Water is used as an ingredient, as an essential processing element, as a cooling agent and for the cleaning of equipment and installations in many food and beverage industries. Consequently, the sector is affected by the impact of climate change of reduced water availability. This paper presents current issues related to water demand in the food and beverage industry and addresses adaptation measures in response to reduced water availability. The food and drink industry is a large drinking quality water consumer. Owing to that, the sector has to adopt reduction and minimisation measures in line with the Best Available Techniques. In particular, some general measures can be adopted by all industries of the sector, while other measures are sector-specific measures including the meat and poultry processing sector, the fish processing sector, the fruit and vegetables division, dairies and the drink manufacturing industry. Through widespread adoption of water reducing and minimisation measures, the sector will move towards sustainable development achieving decoupling of economic growth from resource use as response to reduced water availability.

Beverage industry

Water use

10.1080/19443994.2015.1049407

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Citations (17)

Analysis of tar compounds and quantification of naphthalene from thermal treatment of household biowaste

Journal of Environmental Management (2017)

Stergios Vakalis Francesco Patuzzi Κωνσταντίνος Μουστάκας A. Sotiropoulos Dimitris Malamis

tar (computing)

Torrefaction

10.1016/j.jenvman.2017.04.063

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Citations (11)

Comparative life cycle assessment of a waste to ethanol biorefinery system versus conventional waste management methods

Resources Conservation and Recycling (2019)

Christina Papadaskalopoulou A. Sotiropoulos Jelica Novacovic Elli Barabouti Sofia Mai

10.1016/j.resconrec.2019.05.006

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Citations (55)

Assessment of the effect of drying temperature and composition on the biochemical methane potential of in-house dried household food waste

Waste Management & Research The Journal for a Sustainable Circular Economy (2019)

Katerina Valta A. Sotiropoulos Dimitris Malamis T. Kosanovic Γεωργία Αντωνοπούλου

Household food waste management and treatment has been recognised as a significant issue worldwide and at a European Union level. Source-separation of household food waste following drying at source presents a viable solution to this problem. The present research aims at investigating the effect of drying of model household food waste at different temperatures (i.e. 63 ±3 °C and 83 ±3 °C) on its biochemical methane potential. The drying process was carried out using a prototype household waste dryer. The model sample consisted of 77%w/w vegetables and fruits (48%w/w and 29%w/w, respectively), 12%w/w pasta/rice, 6%w/w meat and fish, 3%w/w bread and bakery and 2%w/w dairy. Moreover, drying at the same temperatures was applied for two household food wastes samples with different composition, in order to assess the influence of the samples' composition on both the drying process and the methane generation. For all temperatures used, the higher %w/w mass reduction was observed for model waste (MD) (67.39%w/w and 75.79%w/w for 63 °C and 83 °C, respectively), then for rich-in-protein content (PRO) (66.18%w/w and 69.73%w/w for 63 °C and 83 °C, respectively) and finally for rich-in-fat content (FAT) samples (54.35%w/w and 66.31%w/w for 63 °C and 83 °C, respectively), which confirmed the effectiveness of the drying process. The biochemical methane potential experiments have confirmed that the substrate produced the highest methane yields was the FAT, producing 524.25 ±2.86 L CH4 kg-1 volatile solids.

Food Waste

Green waste

10.1177/0734242x18823943

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Citations (14)