Session 32 - Environmental Biotechnology and Bioenergy

[CEST2019_00916] Co-Pyrolysis of Corn Stover Wıth Plastıc: Optımızatıon Based on Synergy
by Salvilla J., De Luna M., Rollon A.

The co-pyrolysis of lignocellulosic wastes such as Corn stover with plastic has been found to improve the both the yield and quality of pyrolysis oil and gas products. In this study, the co-pyrolysis of Corn stover (CS) with plastic (LDPE, and PP) were studied through thermogravimetric analysis. The parameter “change in weight loss rate” denoted by ΔW was used to quantify the synergistic effects on the yield during co-pyrolysis.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:27 to 16:30
Flash presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00920] Hierarchization of pure silica LTA zeolite
by Tarach K. A., Valencia S., Góra-Marek K., Rey F.

The effect of base leaching on pure silica ITQ-29 zeolite being the counterpart of LTA zeolite, was investigated. The extent of the desilication process over pure silica zeolite was controlled by partial detemplation followed by silicon extraction. The potential of hierarchically porous ITQ-29 zeolite in environmentally friendly applications concern selective adsorption of organic molecules in aqueous environments. The introduction of additional porosity by desilication process offers full usage of zeolite grains volume without diffusional limitations during the adsorption process.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:21 to 16:24
Flash presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00935] Bio-scrubber coupled with ozonation for enhanced VOCs abatement
by Senatore V., Oliva G., Zarra T., Belgiorno V., Naddeo V.

Volatile Organic Compounds (VOCs) are toxic for the environment and human health and their tendency to readily volatilize in the atmosphere leads to problems connected to odours annoyance. The conventional treatments for VOCs gaseous emissions conventionally entail the application of chemical-physical processes, only promoting the transfer of the contaminants from gas to liquid and/or solid phases. Advanced Oxidation Process (AOPs) and biological processes, conversely, support the oxidation of the organic pollutants, promoting their conversion into harmless and odourless compounds.

Session: 32, Room: B, at Fri, 09/06/2019 - 15:45 to 16:00
Oral presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00843] Heterotrophic growth of Chlorella vulgaris on crude glycerol
by Gougoulias N., Metsoviti M.N., Grigoriou M., Lamprakopoulos S., Mpesios A. , Papapolymerou G.

The heterotrophic growth of C. vulgaris using crude glycerol as the sole carbon source was studied in five 5L flasks. Air in each flask was provided at a rate of 300 L/hr and the contents were continuously stirred with a magnetic bar. Temperature, pH and initial inorganic nutrients (nitrogen, phosphorus, potassium and micronutrients) were kept the same in all flasks. The C/N ratio varied in each of the five flasks was set at 6, 13, 25.4, 61.5 and 118 respectively while the nitrogen initial concentration was equal to 45.4 mg/L in all flasks.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:15 to 16:18
Flash presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00774] Pyrolysis of Spirulina sp. Microalgae: Effect of Temperature on Chemical Compositions of Bio-Oil and Aqueous Phase
by Özçakir G., Karaduman A.

Pyrolysis of Spirulina sp. Microalgae was carried out in a semi-batch glass reactor system. Effect of temperature on the yields of pyrolytic products (gaseous, liquid and solid residue) and chemical composition of the liquid products were investigated. All experiments were performed in 25 mL/min nitrogen atmosphere with 15 g feedstock which was dry and powder form of Spirulina. Temperature was varied from 470 to 620 °C with 50 °C break by utilizing PID controller which was setted 10 °C/min heating rate.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:00 to 16:15
Oral presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00709] Anaerobic digestion of long-chain fatty acids (oleic, palmitic, stearic) with whey protein as the emulsifier
by Eftaxias A., Michailidis C., Stamatelatou K., Diamantis V., Aivasidis A.

Long chain fatty acids are major lipid constituents. In this study, anaerobic digestion of oleic, palmitic or stearic acid (5 g/L each) emulsified with whey protein (20 g/L) was examined in continuous (batch-fed) stirred tank digesters with 2 L working volume. Anaerobic co-digestion of oleic acid displayed high biogas yield (0.47 L/gCOD), compared to palmitic (0.42 L/gCOD) and stearic acid (0.30 L/gCOD). Oleic acid, despite its high biodegradability resulted in major inhibition of the acetoclastic methanogens, as demonstrated by VFA accumulation and by the methanogenic activity assay.

Session: 32, Room: B, at Fri, 09/06/2019 - 15:15 to 15:30
Oral presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00715] High-rate anaerobic co-digestion of agro-industrial wastes combined with ammonia recovery and biogas purification
by Eftaxias A., Georgiou D., Diamantis V., Koumara A., Koskinari M.D., Aivasidis A.

Screened dairy manure, pressure-sterilized animal by-products, and cheese whey were co-digested in a Plug Flow Reactor (PFR) over a period of 150 days. The PFR process was stable even under a hydraulic retention time of 3 days, corresponding to an organic loading rate (OLR) of 22 g/Ld. Effluent COD remained low (5.6±1.4 g/L) while VFA concentrations were negligible (< 0.5 g/L as COD). The biogas production rate from the PFR ranged from 2.6 up to 7.3 L/Ld.

Session: 32, Room: B, at Fri, 09/06/2019 - 15:30 to 15:45
Oral presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00634] An innovative green iron-fertilizer, produced biotechnologically, for correcting iron chlorosis of soybean plants grown in calcareous soils
by Ferreira C., Lopez-Rayo S., Lucena J., Soares E., Soares H.

Iron deficiency is one of the main causes of chlorosis in plants, which leads to the loss in the field crops quality and yield. Iron-deficiency is a worldwide problem, particularly sever in calcareous soils (about 30% of world´s land surface). The current use of synthetic iron-chelates to prevent or correct iron-deficiency in plants raises environmental concerns due to their poor biodegradability. Thus, new, more environmentally-friendly efficient solutions are needed to solve iron deficiency-induced chlorosis (IDIC) in crops grown in calcareous soils.

Session: 32, Room: B, at Fri, 09/06/2019 - 15:00 to 15:15
Oral presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00541] Screening strains of genus Pleurotus for biomass production in solid state fermentation of agricultural residues
by Diamantopoulou P., Melanouri E.-M., Papanikolaou S.

The ability of several strains belonging to Pleurotus ostreatus and P. eryngii mushroom genera to grow on various agricultural residues was examined and their mycelium growth rates and biomass production (estimated as glucosamine content) were compared. Four P. ostreatus (AMRL 137, 144, 147, 150) and four P. eryngii (AMRL 160, 163, 166, 173-6) strains were cultivated on wheat, barley and oat straw, poplar and beech-wood sawdust, cotton and coffee residues, corn-cobs, rice bark, olive cake supplemented with wheat bran on a final C/N 20-30.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:24 to 16:27
Flash presentation in Environmental Biotechnology and Bioenergy
[CEST2019_00346] Characterization of Xylanase-Treated Karagumoy Fiber Reinforced Composite (KFRC)
by Mina M.T.M., Tumolva T.P.

This work determined the effects of enzyme treatment on the mechanical properties of natural fiber-reinforced composite using Pandanus simplex (karagumoy) fibers. Physical modification using enzyme improved chemical and mechanical properties of fibers and the karagumoy fiber-reinforced composites (KFRCs) produced. Enzyme concentration and soaking time were used as treatment parameters. The treatment scheme improved the mechanical properties of fibers and composites, as well as, the composites’ water absorption property.

Session: 32, Room: B, at Fri, 09/06/2019 - 16:18 to 16:21
Flash presentation in Environmental Biotechnology and Bioenergy