Search Results - "Kougias, P.G."

Process performance and comparative metagenomic analysis during co-digestion of manure and lignocellulosic biomass for biogas production by Tsapekos, P., Kougias, P.G., Treu, L., Campanaro, S., Angelidaki, I.

“…[Display omitted] •Pig manure and ensiled meadow grass were examined in co-digestion process.•Mechanical pretreatment increased the methane yield by…”
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Two-year microbial adaptation during hydrogen-mediated biogas upgrading process in a serial reactor configuration by Treu, L., Kougias, P.G., de Diego-Díaz, B., Campanaro, S., Bassani, I., Fernández-Rodríguez, J., Angelidaki, I.

“…[Display omitted] •Long term biological biogas upgrading reactor system was monitored.•Biogas upgrading performance reached 99% methane content after two-year…”
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Environmental impacts of biogas production from grass: Role of co-digestion and pretreatment at harvesting time by Tsapekos, P., Khoshnevisan, B., Alvarado-Morales, M., Symeonidis, A., Kougias, P.G., Angelidaki, Irini

“…•LCA of biogas production from pretreated grass at harvesting time was evaluated.•Downstream strategies were combined heat and power and biogas…”
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Bioaugmentation with hydrolytic microbes to improve the anaerobic biodegradability of lignocellulosic agricultural residues by Tsapekos, P., Kougias, P.G., Vasileiou, S.A., Treu, L., Campanaro, S., Lyberatos, G., Angelidaki, I.

“…•Bioaugmentation with Clostridium thermocellum and Melioribacter roseus was examined.•C. thermocellum enhanced the anaerobic biodegradability of wheat straw up…”
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Biogas production from ensiled meadow grass; effect of mechanical pretreatments and rapid determination of substrate biodegradability via physicochemical methods by Tsapekos, P., Kougias, P.G., Angelidaki, I.

“…•Methane production from untreated and pretreated ensiled meadow grass was examined.•Mechanical pretreatments improved the ensiled meadow grass…”
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Effect of micro-aeration and inoculum type on the biodegradation of lignocellulosic substrate by Tsapekos, P., Kougias, P.G., Vasileiou, S.A., Lyberatos, G., Angelidaki, I.

“…•Micro-aerobic conditions were applied to enhance the methane yield of wheat straw.•Oxygen load, pulse frequency and micro-aeration period were the examined…”
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Mechanical pretreatment at harvesting increases the bioenergy output from marginal land grasses by Tsapekos, P., Kougias, P.G., Egelund, H., Larsen, U., Pedersen, J., Trénel, P., Angelidaki, I.

“…Meadow grass has recently gained increased attention as a substrate for full-scale biogas reactors. However, to increase its biodegradability, pretreatment is…”
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Energy recovery from wastewater microalgae through anaerobic digestion process: Methane potential, continuous reactor operation and modelling aspects by Tsapekos, P., Kougias, P.G., Alvarado-Morales, M., Kovalovszki, A., Corbière, M., Angelidaki, I.

“…[Display omitted] •The mono-digestion of wastewater microalgae led to the highest methane yield.•High biogas yield was produced when the share of wastewater…”
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Effect of feedstock composition and organic loading rate during the mesophilic co-digestion of olive mill wastewater and swine manure by Kougias, P.G., Kotsopoulos, T.A., Martzopoulos, G.G.

“…In the present study, the optimisation of the mesophilic anaerobic co-digestion process of olive mill wastewaters (OMW) together with swine manure (SM) was…”
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Antifoaming effect of chemical compounds in manure biogas reactors by Kougias, P.G., Tsapekos, P., Boe, K., Angelidaki, I.

“…A precise and efficient antifoaming control strategy in bioprocesses is a challenging task as foaming is a very complex phenomenon. Nevertheless, foam control…”
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Effect of organic loading rate and feedstock composition on foaming in manure-based biogas reactors by Kougias, P.G., Boe, K., Angelidaki, I.

“…•Organic loading rate was the main factor affecting foaming.•An organic loading rate of 3.5gVS/(L-reactor·day) was safe to avoid foaming.•Proteins initiated…”
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Counteracting foaming caused by lipids or proteins in biogas reactors using rapeseed oil or oleic acid as antifoaming agents by Kougias, P.G., Boe, K., Einarsdottir, E.S., Angelidaki, I.

“…Foaming is one of the major operational problems in biogas plants, and dealing with foaming incidents is still based on empirical practices. Various types of…”
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Biological CO2 fixation in up-flow reactors via exogenous H2 addition by Kougias, P.G., Tsapekos, P., Treu, L., Kostoula, M., Campanaro, S., Lyberatos, G., Angelidaki, I.

“…•Biological coupling of CO2 and H2 was evaluated in up-flow reactors.•Biomethanation efficiency was increased using Raschig rings as packing…”
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Foam suppression in overloaded manure-based biogas reactors using antifoaming agents by Kougias, P.G., Boe, K., Tsapekos, P., Angelidaki, I.

“…•Rapeseed oil, oleic and octanoic efficiently suppressed foaming in biogas reactors.•Rapeseed oil was the most suitable antifoam for overloaded…”
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Improving the energy balance of grass-based anaerobic digestion through combined harvesting and pretreatment by Tsapekos, P., Kougias, P.G., Egelund, H., Larsen, U., Pedersen, J., Trénel, P., Angelidaki, I.

“…An important challenge that has to be addressed to achieve sustainable anaerobic digestion of lignocellulosic substrates is the development of energy and cost…”
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Performance of a covered closed loop shallow geothermal greenhouse heating system by Firfiris, V, Kougias, P.G, Nikita-Martzopoulou, Ch, Martzopoulos, G.G

“…A great variety of heating applications are being used nowadays in order to cover the greenhouse thermal needs. During the last decade a significant increase…”
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PERFORMANCE OF A COVERED CLOSED LOOP SHALLOW GEOTHERMAL GREENHOUSE HEATING SYSTEM by Firfiris, V., Kougias, P.G., Nikita-Martzopoulou, CH, Martzopoulos, G.G.

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IMPROVEMENT OF A HEAT PUMP COEFFICIENT OF PERFORMANCE USED IN GREENHOUSES by Kougias, P.G., Firfiris, V., Martzopoulos, G.G.

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Zeolite and swine inoculum effect on poultry manure biomethanation by Kougias, P.G., Fotidis, I.A., Zaganas, I.D., Kotsopoulos, T.A., Martzopoulos, G.G.

“…Poultry manure is an ammonia-rich substrate that inhibits methanogenesis, causing severe problems to the anaerobic digestion process. In this study, the effect…”
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