THERMAL EFFICIENCY OF SMALL SCALE BIOGAS PLANT FOR BIO-METHANE PRODUCTION

2015 ◽  
Vol 14 (4) ◽  
pp. 745-749
Author(s):  
Daisuke Tashima ◽  
Yoki Asano ◽  
Shigeki Tomomatsu ◽  
Yasuhiro Sugimoto
Keyword(s):  
Thermal Efficiency ◽  
Methane Production ◽  
Biogas Plant ◽  
Small Scale

scholarly journals Evaluation of poultry manure and goat cheese whey anaerobic co-digestion

2019 ◽  
Vol 17 (2) ◽  
pp. e0302 ◽  
Author(s):  
Juan L. Ramos-Suárez ◽  
Claudia L. Vargas-Avendaño ◽  
Javier Mata-González ◽  
Ángeles Camacho-Pérez
Keyword(s):  
Methane Production ◽  
Cheese Whey ◽  
Poultry Manure ◽  
Biogas Plant ◽  
Small Scale ◽  
Energy Yield ◽  
Continuous Mode ◽  
Batch Mode ◽  
Goat Cheese ◽  
Continuously Stirred Tank Reactor

Hen droppings (HD) and Goat Cheese Whey (GCW) are two difficult substrates to be treated by anaerobic digestion due to their characteristics; however, their co-digestion offers the possibility of successfully treating these substrates together. The goal of this study was to evaluate the anaerobic co-digestion of HD and GCW at laboratory scale in order to determine biogas potential and possible operational problems before extrapolating results to a full-scale biogas plant. The potential methane production of HD, GCW and a mixture of both substrates was studied in batch mode, whereas the co-digestion of the mixture of HD and GCW was also studied in semi-continuous mode in a continuously stirred tank reactor. Results showed that the addition of GCW to HD increased methane production compared to HD alone; however, GCW alone showed the highest methane potential. In semi-continuous mode, the mixture of GCW and HD showed high biogas and methane yields (582.0±29.5 Lbiogas kg VS-1 and 381.2±19.0 LCH4 kg VS-1, respectively), although intense foaming incidents occurred. The composition of both substrates is complementary for their co-digestion and it improved the energy yield of the process. However, the economic viability of a biogas plant of 30 kWe, designed for treating HD and GCW, would be economically feasible only with subsidies for the investment and in the low range of investment costs for small scale biogas plants.

Synergy between feedstock gate fee and power-to-gas: An energy and economic analysis of renewable methane production in a biogas plant

2021 ◽  
Vol 173 ◽  
pp. 12-23
Author(s):  
Robert Bedoić ◽  
Hrvoje Dorotić ◽  
Daniel Rolph Schneider ◽  
Lidija Čuček ◽  
Boris Ćosić ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Methane Production ◽  
Biogas Plant ◽  
Power To Gas

scholarly journals Diploptene <i>δ</i><sup>13</sup>C values from contemporary thermokarst lake sediments show complex spatial variation

2016 ◽  
Vol 13 (8) ◽  
pp. 2611-2621 ◽  
Author(s):  
Kimberley L. Davies ◽  
Richard D. Pancost ◽  
Mary E. Edwards ◽  
Katey M. Walter Anthony ◽  
Peter G. Langdon ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Lake Sediments ◽  
Methane Oxidation ◽  
Methane Production ◽  
Small Scale ◽  
Δ13c Values ◽  
Thermokarst Lakes ◽  
Methane Ebullition ◽  
Methane Efflux ◽  
Isotopic Signal

Abstract. Cryospheric changes in northern high latitudes are linked to significant greenhouse gas flux to the atmosphere, for example, methane that originates from organic matter decomposition in thermokarst lakes. The set of pathways that link methane production in sediments, via oxidation in the lake system, to the flux of residual methane to the atmosphere is complex and exhibits temporal and spatial variation. The isotopic signal of bacterial biomarkers (hopanoids, e.g. diploptene) in sediments has been used to identify contemporary ocean-floor methane seeps and, in the geological record, periods of enhanced methane production (e.g. the PETM). The biomarker approach could potentially be used to assess temporal changes in lake emissions through the Holocene via the sedimentary biomarker record. However, there are no data on the consistency of the signal of isotopic depletion in relation to source or on the amount of noise (unexplained variation) in biomarker values from modern lake sediments. We assessed methane oxidation as represented by the isotopic signal of biomarkers from methane oxidising bacteria (MOB) in multiple surface sediment samples in three distinct areas known to emit varying levels of methane in two shallow Alaskan thermokarst lakes. Diploptene was present and had δ13C values lower than −38 ‰ in all sediments analysed, suggesting methane oxidation was widespread. However, there was considerable variation in δ13C values within each area. The most 13C-depleted diploptene was found in an area of high methane ebullition in Ace Lake (diploptene δ13C values between −68.2 and −50.1 ‰). In contrast, significantly higher diploptene δ13C values (between −42.9 and −38.8 ‰) were found in an area of methane ebullition in Smith Lake. δ13C values of diploptene between −56.8 and −46.9 ‰ were found in the centre of Smith Lake, where ebullition rates are low but diffusive methane efflux occurs. The small-scale heterogeneity of the samples may reflect patchy distribution of substrate and/or MOB within the sediments. The two ebullition areas differ in age and type of organic carbon substrate, which may affect methane production, transport, and subsequent oxidation. Given the high amount of variation in surface samples, a more extensive calibration of modern sediment properties, within and among lakes, is required before down-core records of hopanoid isotopic signatures are developed.

Small-scale heterogeneity in carbon dioxide, nitrous oxide and methane production from aggregates of a cultivated sandy-loam soil

2008 ◽  
Vol 40 (9) ◽  
pp. 2468-2473 ◽  
Author(s):  
Benjamin K. Sey ◽  
Ameur M. Manceur ◽  
Joann K. Whalen ◽  
Edward G. Gregorich ◽  
Philippe Rochette
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Methane Production ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Small Scale ◽  
Scale Heterogeneity ◽  
Loam Soil

Enhancing ethanol and methane production from rice straw by pretreatment with liquid waste from biogas plant

2018 ◽  
Vol 178 ◽  
pp. 290-298 ◽  
Author(s):  
Forough Momayez ◽  
Keikhosro Karimi ◽  
Ilona Sárvári Horváth
Keyword(s):  
Rice Straw ◽  
Methane Production ◽  
Liquid Waste ◽  
Biogas Plant

scholarly journals Use of biogas biscuit meal EKPO-EB for agricultural biogas plant for substitution of energy crops utilization with organic waste

2015 ◽  
Vol 17 (3) ◽  
pp. 40-46
Author(s):  
Kateřina Chamrádová ◽  
Jiří Rusín
Keyword(s):  
Anaerobic Digestion ◽  
Laboratory Experiment ◽  
Methane Production ◽  
Organic Waste ◽  
Dry Mass ◽  
Corn Silage ◽  
Biogas Plant ◽  
High Yield ◽  
Two Stage ◽  
Second Stage

Abstract A laboratory experiment of two-stage mesophilic, low-dry mass, anaerobic digestion was carried out, focused on verifying the benefit of processing the biscuit meal EKPO-EB instead of triticale silage Agostino (GPS) and corn silage LG3266 in a regular batch for the agricultural biogas station in Pustějov. While anaerobic digestion of ensilages is largely difficult due to the content of lignocellulose, biscuit meal provides a high yield of biogas or methane, respectively, thanks to its high content of simple saccharides and lipids. When the original GPS (or the replacement EKPO-EB, respectively) represented 0.81% of weight of the daily input mixture dose for the first stage, the rise in volumetric methane production was 20% which is significant. The biscuit meal EKPO-EB decomposes almost completely in the first stage. Later, when the EKPO-EB represented 1.63% of weight of the daily input mixture dose for the first stage, the rise in volumetric methane production was 54% in the first stage and 16% in the second stage.

Development of a Ceramic Pressurized Volumetric Solar Receiver for Supercritical CO2 Brayton Cycle

2014 ◽  
Author(s):  
S. D. Khivsara ◽  
Rathindra Nath Das ◽  
T. L. Thyagaraj ◽  
Shriya Dhar ◽  
V. Srinivasan ◽  
...  
Keyword(s):  
Thermal Efficiency ◽  
Supercritical Co2 ◽  
Material Selection ◽  
Radiation Heat Transfer ◽  
Small Scale ◽  
Attractive Alternative ◽  
Transfer Model ◽  
Outlet Temperature ◽  
Brayton Cycle ◽  
Solar Thermal Energy

Recently, the supercritical CO2 (s-CO2) Brayton cycle has been identified as a promising candidate for solar-thermal energy conversion due to its potentially high thermal efficiency (50%, for turbine inlet temperatures of ∼ 1000K). Realization of such a system requires development of solar receivers which can raise the temperature of s-CO2 by over 200K, to a receiver outlet temperature of 1000K. Volumetric receivers are an attractive alternative to tubular receivers due to their geometry, functionality and reduced thermal losses. A concept of a ceramic pressurized volumetric receiver for s-CO2 has been developed in this work. Computational Fluid Dynamics (CFD) analysis along with a Discrete Ordinate Method (DOM) radiation heat transfer model has been carried out, and the results for temperature distribution in the receiver and the resulting thermal efficiency are presented. We address issues regarding material selection for the absorber structure, window, coating, receiver body and insulation. A modular small scale prototype with 0.5 kWth solar heat input has been designed. The design of a s-CO2 loop for testing this receiver module is also presented in this work.

scholarly journals Small-Scale Biogas Plant from Swine Farm in Northern Thailand

2017 ◽  
Vol 141 ◽  
pp. 165-169 ◽  
Author(s):  
Det Damrongsak ◽  
Chatchawan Chaichana ◽  
Wongkot Wongsapai
Keyword(s):  
Biogas Plant ◽  
Small Scale ◽  
Swine Farm ◽  
Northern Thailand
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