Environmental biotechnology and bioenergy-POSTER SESSION

[CEST2019_00959] Anaerobic co-digestion of poultry manure and used cooking oil for enhanced biogas production
by Eftaxias A., Gkalimanis P., Koskinari M.D., Koumara A., Diamantis V., Aivasidis A.

Aim of this study was to evaluate the anaerobic co-digestion of diluted poultry manure (DPM) and used cooking oil (UCO). Mixtures of DPM with different UCO dosages (1 to 6% v/v) were prepared using a high-shear emulsifier and digested in batch anaerobic reactors. Increasing the UCO dosage resulted in a respective increase of the emulsion COD (from initially 64 to 182 g/L) however the stability of the emulsion was adversely affected. The optimum UCO dosage (1.5-2.0% v/v) was further digested in a semi-continuous mesophilic anaerobic reactor, to assess the feasibility of the process at OLR up to 8 g/Ld. The anaerobic reactor was stable, giving a biogas yield of 0.45 L/gCOD, with low supernatant COD (6 g/L), negligible VFA accumulation and without foaming.

Friday
Poster presentation in Environmental biotechnology and bioenergy-POSTER SESSION
[CEST2019_00202] Characterizing activated carbon synthesized from corn straw aiming water treatment
by Silva T.P.B., Souza I.A.V.B., Abud A.K.S., Silva C.E.F.

The emerging agenda for sustainable development and global warming control searches urgent researches to reduce environmental impacts. In this sense, activated carbons from agroindustrial wastes are widely used as adsorbents in food and pharmaceuticals industries, mainly for the separation and purification of biomolecules, due to their complex pore structure and high surface area. This research evaluates the corn straw activated carbon obtained from the chemical impregnating with phosphoric acid under stirring for 30 min, being sequentially drying at 50 °C and characterized looking for water treatment application. The adsorption of methylene blue from aqueous solutions was investigated by batch experiments carried out at 30 °C and 100 rpm, obtaining 99 mg g-1 as the maximum adsorption capacity. The activated carbon had different functional groups when compared to its precursor material, an iodine value of 405.83 mg I2 g-1 and pHPZC of 5.75, characterizing it as slightly acidic, with a surface area of 409.314 m2 g-1, presenting potential as a biosorbent for technological application.

Friday
Poster presentation in Environmental biotechnology and bioenergy-POSTER SESSION
[CEST2019_00281] Production of PHAs with enhanced properties from sugar-based wastewater in a two stage process
by Fouskakis G., Stergiopoulou E., Alexandropoulou M., Antonopoulou G., Ntaikou I., Lyberatos G.

The experimental design of the study was based on two different microbial processes, i.e. anaerobic fermentation of a sugar-based wastewater via mixed acidogenic cultures and aerobic polymerization of the produced acids and alcohols for poly-hydroxy-alkanoates (PHAs) production, via enriched cultures. For the first stage of the combined process, a continuous up-flow column reactor (UFCR) and a continuous stirred tank reactor (CSTR) were developed. For the optimization of the performance of both reactors, the effect of main parameters influencing the distribution of the produced acids was investigated. The liquid effluents of the reactors, containing fatty acids and ethanol were forwarded to the second stage of the combined process. A sequential batch reactor (SBR) was used for the second, aerobic stage of PHAs production

Friday
Poster presentation in Environmental biotechnology and bioenergy-POSTER SESSION