Effects of Different Materials on Biogas Production during Anaerobic Digestion of Food Waste

Iliana Dompara, Angeliki Maragkaki (), Nikolaos Papastefanakis, Christina Floraki, Dimitra Vernardou and Thrassyvoulos Manios
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Iliana Dompara: Department of Agriculture, School of Agricultural Science, Hellenic Mediterranean University, 71401 Crete, Greece
Angeliki Maragkaki: Department of Agriculture, School of Agricultural Science, Hellenic Mediterranean University, 71401 Crete, Greece
Nikolaos Papastefanakis: Department of Agriculture, School of Agricultural Science, Hellenic Mediterranean University, 71401 Crete, Greece
Christina Floraki: Department of Electrical and Computer Engineering, School of Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece
Dimitra Vernardou: Department of Electrical and Computer Engineering, School of Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece
Thrassyvoulos Manios: Department of Agriculture, School of Agricultural Science, Hellenic Mediterranean University, 71401 Crete, Greece

Sustainability, 2023, vol. 15, issue 7, 1-13

Abstract: One of the best methods for turning different types of biomass into clean energy is anaerobic digestion (AD). Organic and inorganic additives may be employed in the AD process to increase biogas output. It has been demonstrated that inorganic additives, such as micronutrients, can improve the efficiency of biogas producing reactors. These trace items can be introduced to the AD process as powders. The use of metal oxides in engineering and environmental research has become more popular. This study focuses on the role of TiO 2 and ZnO/Ag powders on anaerobic digestion. Food waste studies on biochemical methane potential were performed with and without TiO 2 and ZnO/Ag powders to examine their impact on AD. All powders are grown through the hydrothermal procedure, which has proved to be environmentally friendly and low in cost, presenting the capability to simply control the materials’ characteristics at mild temperatures. The addition of ZnO/Ag and TiO 2 improved the biogas cumulative yield by 12 and 44%, respectively, compared to the control reactor. In addition, volatile solids (VS) removal efficiency increased by 5.7% in the food wastes (FW) and TiO 2 reactor, while total chemical oxygen demand (TCOD) removal efficiency increased by 22% after the addition of ZnO/Ag.

Keywords: anaerobic digestion; metal oxide; biogas production; powders; hydrothermal procedure; food waste treatment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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