Design of Low-Cost Ethanol Production Medium From Syngas: An Optimization of Trace Metals for Clostridium Ljungdahlii

[Abstract] Syngas fermentation via the Wood-Ljungdahl (WL) pathway is a promising approach for converting gaseous pollutants (CO and CO2) into high-value commodities. Because the WL involves several enzymes with trace metal components, it requires an adequate supply of micronutrients in the fermentation medium for targeted bioprocessing such as bioethanol production. Plackett-Burman statistical analysis was performed to examine the most efficient trace elements (Ni, Mg, Ca, Mn, Co, Cu, B, W, Zn, Fe, and Mo) and their concentrations for Clostridium ljungdahlii on ethanol production. Overall, 1.5 to 2.5 fold improvement in ethanol production could be achieved with designed trace element concentrations. The effects of tungsten and copper on ethanol and biomass production were determined to be the most significant, respectively. The model developed was statistically significant and has the potential to significantly decrease the cost of trace element solutions by 18–22%. This research demonstrates the critical importance of optimizing the medium for syngas fermentation in terms of product distribution and economic feasibility.Turquía. Scientific and Technological Research Council of Turkey; 118Y305Turquía. Ege University; FDK-2020-22039Xunta de Galicia; ED481D 2019/03

Waste Management of Ege University during the COVID-19 period

Ege University manages packaging wastes, hazardous wastes, electronic wastes and organic wastes within the scope of integrated waste management and has been awarded the Ministry of Environment and Urbanization Zero Waste Certificate. For packaging waste, recycled and non-recyclable wastes are collected separately. Recycled wastes are collected in blue boxes and gray boxes are used for non-recyclable wastes. Along with the pandemic period, with the directive of the Ministry of Environment and Urbanization, extra gray boxes were added and used to collect waste materials such as masks, gloves, etc. The first COVID case in Turkey started in March 2020 and these studies came into effect in April. In this context, all staff and students are informed and the health of the community and the environment is protected.Keyword: waste management, mask and glove waste management, COVID-1