scholarly journals Maximum production point tracking method for a solar-boosted biogas energy generation system

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Jialin Chen ◽  
Ruijiang Yang ◽  
Da Xu ◽  
Bin Zhou ◽  
Yifang Jin
Keyword(s):  
Solar Energy ◽  
Production Rate ◽  
Biogas Production ◽  
Generation System ◽  
Tracking Method ◽  
Biogas Yield ◽  
Maximum Production ◽  
Point Tracking ◽  
Biogas Energy ◽  
Biogas Production Rate

AbstractLow biogas yield in cold climates has brought great challenges in terms of the flexibility and resilience of biogas energy systems. This paper proposes a maximum production point tracking method for a solar-boosted biogas generation system to enhance the biogas production rate in extreme climates. In the proposed method, a multi-dimensional R–C thermal circuit model is formulated to analyze the digesting thermodynamic effect of the anaerobic digester with solar energy injection, while a hydrodynamic model is formulated to express the fluid dynamic interaction between the hot-water circulation flow and solar energy injection. This comprehensive dynamic model can provide an essential basis for controlling the solar energy for digester heating to optimize anaerobic fermentation and biogas production efficiency in extreme climates. A model predictive control method is developed to accurately track the maximum biogas production rate in varying ambient climate conditions. Comparative results demonstrate that the proposed methodology can effectively control the fermentation temperature and biogas yield in extreme climates, and confirm its capability to enhance the flexibility and resilience of the solar-boosted biogas generation system.

scholarly journals Production of Biogas Using Maize Silage Supplemented with Residual Glycerine from Biodiesel Manufacturing

2014 ◽  
Vol 40 (4) ◽  
pp. 17-29 ◽  
Author(s):  
Tomasz Pokój ◽  
Zygmunt M. Gusiatin ◽  
Katarzyna Bułkowska ◽  
Bogdan Dubis
Keyword(s):  
Production Rate ◽  
Dry Matter ◽  
Biogas Production ◽  
Methanogenic Bacteria ◽  
Organic Load ◽  
Maize Silage ◽  
Biogas Yield ◽  
Load Rate ◽  
Glycerine Content ◽  
Biogas Production Rate

Abstract The aim of this study was to investigate the influence of residual glycerine (5 and 10% w/w) from the biodiesel industry, used as a co-substrate, on biogas production from maize silage. The experiments were conducted in a laboratory-scale, single-stage anaerobic digester at 39ºC and hydraulic retention time (HRT) of 60 d. Addition of 5% residual glycerine caused organic load rate (OLR) to increase to 1.82 compared with 1.31 g organic dry matter (ODM) L-1d-1 for maize silage alone. The specific biogas production rate and biogas yield were 1.34 L L-1d-1 and 0.71 L g ODM-1 respectively, i.e. 86% and 30% higher than for maize alone. Increasing the residual glycerine content to 10% increased OLR (2.01 g ODM L-1d-1), but clearly decreased the specific biogas production rate and biogas yield to 0.50 L L-1d-1 and 0.13 L g ODM-1 respectively. This suggested that 10% glycerine content inhibited methanogenic bacteria and organics conversion into biogas. As a result, there was accumulation of propionic and valeric acids throughout the experiment.

scholarly journals Potential Test on Utilization of Cow’s Rumen Fluid to Increase Biogas Production Rate and Methane Concentration in Biogas

2017 ◽  
Vol 11 (2) ◽  
pp. 82-87 ◽  
Author(s):  
Ambar Pertiwinin ◽  
Endang Susilowati ◽  
Rochijan . ◽  
Nanung Agus Fitri ◽  
Yudistira Soeherman ◽  
...  
Keyword(s):  
Production Rate ◽  
Methane Concentration ◽  
Biogas Production ◽  
Rumen Fluid ◽  
Potential Test ◽  
Biogas Production Rate

scholarly journals Anaerobic Digestion of Cassava (Manihot Esculenta) Waste: Effects of Inoculum on Biogas Production Rate

2020 ◽  
Vol 4 (2) ◽  
pp. 411-420
Author(s):  
B.E. Eboibi ◽  
K.O. Adiotomre ◽  
F. Onobrudu ◽  
E. Osioh
Keyword(s):  
Anaerobic Digestion ◽  
Production Rate ◽  
Manihot Esculenta ◽  
Decay Constant ◽  
Biogas Production ◽  
Cow Manure ◽  
Anaerobic Digesters ◽  
First Order ◽  
Cassava Peel ◽  
Biogas Production Rate

In this paper, cow manure fluid was used as inoculums to investigate biogas production rate from anaerobic digestion of cassava peel at mesophilic temperature (280C). The anaerobic experiment was conducted using six batch digesters (D1, D2, D3, D4, D5 and D6) each of 20L capacity for 40-day hydraulic retention. Each digester, was loaded with 5kg of cassava peel (CP) and 0%, 10%, 20%, 30%, 40% and 50% of inoculum to CP. Hashimoto model was used to obtain the digestion kinetic parameters. The results of the study showed that inoculums influenced the rate of biogas production, showing variations in biogas production, correlation coefficient (R2) and in first-order decay constant (k). The average cumulative biogas production was in the range of ~2358 to 4010ml/kgVS for 10% to 50% inoculum. The R2 and k for D1 was 0.959 and 0.359 D1 (without inoculum), 0.990 and 0.371 for D2 (10% inoculum) and 0.991 and 0.371 for D3 (20% inoculum), 0.951 and 0.356 for D4 (30% inoculum), 0.992 and 0.372 for D5 (40% inoculum), and 0.990 and 0.371 was obtained for D6 loaded with 50% inoculum. Despite variation in biogas yields from different inoculums, biogas production obtained from anaerobic digesters loaded with inoculums were still lower compared with that without inoculum.

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