Session 23 - Energy technologies and sustainability

[CEST2019_00857] Mass and energy balances of sewage sludge pyrolysis in a lab rotary kiln
by Mendoza L., Gómez A., Rincón S.

The aim of this work is to study the influence of the main parameters of sewage pyrolysis in a rotary kiln on the product distriburion and energy balances. An indirectly heated rotary kiln at a laboratory scale was used (4 kg/h). An increase in the final temperature causes the reduction of the total condensable products and the non-condensable gas fraction increases. The residence time of the volatile phase has an important influence on the secondary reactions to increase the non-condensable gas with low tars content. These results contribute also a valuable input to perform LCA.

Session: 23, Room: E, at Fri, 09/06/2019 - 10:00 to 10:15
Oral presentation in Energy technologies and sustainability
[CEST2019_00353] Improving aquaculture environmental footprint utilizing offshore renewable energy
by Lilas T., Antoniou E., Kotrikla A., Vatistas A., Dagkinis I.

The main environmental impacts of aquaculture include eutrophication, chemical pollution and harm to sensitive marine ecosystems. At the same time, the required energy leads to high emissions of greenhouse gases. Offshore wind turbines are a sector of renewable energy that grows rapidly. Offshore wind turbines can be combined with aquaculture units to meet their energy needs, saving fuel and reducing their carbon footprint. However, there are many difficulties in installing aquaculture units in existing offshore wind parks (e.g. small water depth).

Session: 23, Room: E, at Fri, 09/06/2019 - 10:15 to 10:30
Oral presentation in Energy technologies and sustainability
[CEST2019_00224] Production of activated carbon from oil palm shells via physical activation with H2O and its characterization for use in aqueous phase
by Alvarez-Villanueva D.M., Rincon Prat S.L.

Oil palm shells (OPS) are a solid residue of the extraction of palm oil having excellent characteristics for production of activated carbon. OPS worldwide production amounts to 17.214 ton (2018) from which Colombia participates with 364 ton. Oil palm shells were first carbonized in a horizontal oven under N2 atmosphere until 850 °C for 30 min. Carbonized samples were than submitted to physical activation with steam in the same horizontal oven. A variation of process parameters was performed. Activation temperatures of 750, 800, 850 and 900 °C were studied.

Session: 23, Room: E, at Fri, 09/06/2019 - 09:45 to 10:00
Oral presentation in Energy technologies and sustainability
[CEST2019_00200] Life Cycle Assessment of Electricity production in the Czech Republic – case-study of lignite combustion and hydropower
by Štefanica J., Zakuciová K., Kočí V., Šerešová M., Vlček Z., Vitvarová M., Opatřil J.

Environmental impacts of various types of energy production are compared in the scope of an ongoing national research project “Life Cycle Assessment of Energy Production”. The project is using the LCA method to compare the potential environmental impacts of selected energy sources throughout their whole life cycle. The energy sources are representative for the energy grid of the Czech Republic. The inventory data used for the LCA are based on case studies of selected Czech power plants.

Session: 23, Room: E, at Fri, 09/06/2019 - 09:30 to 09:45
Oral presentation in Energy technologies and sustainability
[CEST2019_00034] Long Term Solids Handling Alternatives for New York City Water Resource Recovery Facilities (WRRFs)
by Halim D., Ramalingam K., Fillos J., Katehis D., Orpianesi M.

New York City Department of Environmental Protection, (DEP), owns and operates 14 water resource recovery facilities (WRRFs) which treat a combined average dry weather flow of 57 m3/sec. DEP in association with the City College of New York, (CCNY), has embarked on a long term project to assess thermal hydrolysis pretreatment of the combined sludge to enhance production of anaerobic digester gas, (ADG), and take advantages of improve reduction of volatile solids and sludge dewatering. This paper will focus on the initial phases of thermal hydrolysis.

Session: 23, Room: E, at Fri, 09/06/2019 - 09:15 to 09:30
Oral presentation in Energy technologies and sustainability
[CEST2019_00022] Hydrogen production from cotton wastes by mean of dark fermentation
by Sołowski G., Konkol I., Shalaby M., Cenian A.

Dark fermentation of textile wastes is discussed in the paper. In the experiment were used cotton wastes. Before fermentation the cotton was hydrolyzed using 0.1 M of HCl. The inoculum was pretreated using heat shocked for 0.5 h at temperature of 105°C. The fermentation was carried out under conditions: load 5 g/l, pH in the range 5 by 0.1 M of HCl, and oxygen in small quantities was added. The oxygen flow rates (OFR) was 0.008 ml/h. The fermentation was carried out at temperature of 40 °C for one day.

Session: 23, Room: E, at Fri, 09/06/2019 - 09:00 to 09:15
Oral presentation in Energy technologies and sustainability