scholarly journals Effect of Total Solids on Biogas Production in a Fixed Dome Laboratory Digester under Mesophilic Temperature

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Barasa H. Masinde ◽  
◽  
Daudi M. Nyaanga ◽  
Musa R. Njue ◽  
Joseph W. Matofari ◽  
...  
Keyword(s):  
Biogas Production ◽  
Total Solids ◽  
Mesophilic Temperature

scholarly journals Influence of manure concentration as inoculum in anaerobic digestion of vinasse

2017 ◽  
Vol 39 (2) ◽  
pp. 173 ◽  
Author(s):  
Carlos Eduardo de Farias Silva ◽  
Ana Karla de Souza Abud
Keyword(s):  
Biological Process ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Microbiological Analysis ◽  
Total Solids ◽  
Major Factors ◽  
Nitrogen Contents ◽  
Subsequent Stabilization ◽  
Microbial Action ◽  
Sugarcane Industry

Vinasse, main residue of the sugarcane industry, has high pollutant content, being subjected to the use in biogas production due to the high content of organic matter non-toxic to microbial action. For a consolidated process, it is necessary to study parameters that influence the process, in which the amount of inoculum is one of the major factors in the biological process of biogas production. This study investigated the influence of the amount of manure as inoculum (0.5 to 5.5%) during the biodigestion process, evaluating variables such as chemical oxygen demand (COD), pH, biogas production, methane concentration, total solids and total phosphorus and nitrogen contents, as well as microbiological analysis in the sludge remaining in the digester. Biodigestion occurred normally, with hydraulic retention time (HRT) of 20 days, with an acidogenic phase, subsequent stabilization of pH and biogas production. The vinasse had COD and total solids reduced during biodigestion by around 67 and 40%, respectively. Biogas production was increased after the fifth day. Among the three studied conditions, there was no significant increase in efficiency of inoculum use and it can be used the lowest amount, 0.5 % (m v-1). 

Optimum Mesophilic Temperature of Biogas Production from Blends of Agro-Based Wastes

2007 ◽  
Vol 2 (1) ◽  
pp. 39-44 ◽  
Author(s):  
E.O.U. Uzodinma . ◽  
A.U. Ofoefule . ◽  
J.I. Eze . ◽  
N.D. Onwuka .
Keyword(s):  
Biogas Production ◽  
Mesophilic Temperature

scholarly journals Co-digestion of Pretreated Chicken – Goat and Untreated Cow Manure at Different Substrate to Inoculums Ratios and Total Solids for Biogas Production

2020 ◽  
Vol 3 (3) ◽  
pp. 11-21
Author(s):  
Clinton Waswa ◽  
Peter Kabok ◽  
Daudi Nyaanga
Keyword(s):  
Constant Temperature ◽  
Biogas Production ◽  
Total Solid ◽  
Particle Sizes ◽  
Cow Manure ◽  
Production Rates ◽  
Total Solids ◽  
Free Range ◽  
Effective Particle ◽  
Substrate To Inoculum Ratio

Biogas production can be greatly affected by inoculum addition and total solids. The effect of the substrate to inoculum ratios and total solids of chicken, goat and cow manure on biogas production was studied using a 0.15m3 laboratory-scale batch digester at a constant temperature of 35°C. Feedstocks were mechanically minced to 3 mm effective particle sizes prior to co-digesting with untreated cow manure from a free-range dairy rearing system. Different amounts of cow substrate inoculum were used at ratios of 2:1, 3:1, 4:1, 5:1 and 6:1, while total solid levels between (7.5% and 10.5%) at intervals of 0.5% were used to study their effects on biogas production. Increasing inoculums and total solids resulted in increased biogas production with peaks at a substrate to inoculum ratio of 4:1 (20% inoculum addition) and 9% total solids. Biogas production rates of 0.61 and 0.63m3/m3d were realized respectively. Keywords: Biogas Production, Chicken-Goat-Cow Manure, Substrate to Inoculum Ratios, Total Solids

scholarly journals Effect of feed slurry dilution and total solids on specific biogas production by anaerobic digestion in batch and semi-batch reactors

2021 ◽  
Author(s):  
Gautham P. Jeppu ◽  
Jayalal Janardhan ◽  
Shivakumara Kaup ◽  
Anish Janardhanan ◽  
Shakeib Mohammed ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Substrate Inhibition ◽  
Cattle Dung ◽  
Cow Dung ◽  
Batch Reactors ◽  
Dilution Ratio ◽  
Total Solids ◽  
State Process ◽  
Wide Range

AbstractBiomass from various sources such as cow dung is a significant source of renewable energy (as biogas) in many regions globally, especially in India, Africa, Brazil, and China. However, biogas production from biomass such as cattle dung is a slow, inefficient biochemical process, and the specific biogas produced per kg of biomass is relatively small. The improvement of specific biogas production efficiency using various dilution ratios (and, hence, total solids [TS]) is investigated in this work. A wide range of feed dilution (FD) ratios of cow dung: water (CD: W) was tested in batch biogas digesters with total solids ranging from 1% to 12.5% and FD ratio ranging from 2:1 to 1:20. To further verify the results from the above batch experiments, semi-batch experiments representative of field-scale biodigesters were conducted. Semi-batch reactors have a steady-state process, unlike batch reactors, which have an unsteady state process. Our results suggested that specific biogas production (mL/g VS) increased continuously when the total solids decreased from 12.5% to 1% (or when dilution increased). Our experiments also indicate that the commonly used 1:1 feed dilution ratio (TS ~ 10% for cow dung) does not produce the maximum specific biogas production. The possible reason for this could be that anaerobic digestion at higher total solids is rate limited due to substrate inhibition, mass transfer limitations, and viscous mixing problems that arise at higher total solids concentration. Hence, a higher feed dilution ratio between 1:2 and 1:4 (TS between 4 and 6.7%) is recommended for a more efficient biomass utilization of cowdung. Empirical relationships were also developed for variation of specific biogas yield with the total solids content of the cow dung slurry. Graphic abstract

Biogas Production Potential of Poultry Discharge in a Batch Reactor at Mesophilic Temperature

2019 ◽  
Author(s):  
Ademola Oyejide Adebayo ◽  
Simeon Olatayo Jekayinfa ◽  
Paul Amaechi Ozor ◽  
Charles Mbohwa ◽  
Christiane Herrrmann
Keyword(s):  
Biogas Production ◽  
Batch Reactor ◽  
Production Potential ◽  
Mesophilic Temperature

scholarly journals Anaerobic biodigestion of pigs feces in the initial, growing and finishing stages fed with diets formulated with corn or sorghum

2012 ◽  
Vol 32 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Adélia P. Miranda ◽  
Jorge de Lucas Junior ◽  
Maria C. Thomaz ◽  
Gener T. Pereira ◽  
Ellen H. Fukayama
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Average Content ◽  
Total Solids ◽  
Volatile Solids ◽  
Zn And Cu In ◽  
The Mean

The objective of this study was to evaluate the quality and the production of biogas and biofertilizer obtained from biodigester supplied with pig feces in the initial, growing and finishing stages, fed with diets formulated based on corn or sorghum. Twenty bench biodigesters were used with hydraulic retention time of 30 days and daily loads that contained 4 to 6% of total solids (TS) and 3.6 to 5.2% of volatile solids (VS). In the effluent of the biodigesters, mean levels of TS were observed ranging between 1.6 and 2.0% and of VS between 1.2 and 1.6%. The mean reductions of TS were 57.7 to 64.7% and of VS from 61.7 to 69.0%, and there was only difference in the finishing phase, in which the major averages reductions were produced by the biodigesters supplied with feces from animals fed with diets based on corn. In biodigesters supplied with feces from animals in the initial and growing stages fed with diets based on corn, were observed higher average productions of biogas and the greatest average potentials of biogas production. The average potentials obtained were 0.033; 0.181; 0.685; 0.788 and 1.132 m³ per kg of affluent, manure, TS added, VS added and VS reduced, respectively. No differences were found on the average content of methane in the biogas between diets and stages. The average concentrations of nutrients N, P, K, Ca, Mg, Na, Fe, Mn, Zn and Cu in the biodigester affluent and effluent, ranged between diets and stages.

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