scholarly journals Cobalt nanoparticles to enhance anaerobic digestion of cow dung: focusing on kinetic models for biogas yield and effluent utilization

2021 ◽  
Author(s):  
Taha Abdelfattah Mohammed Abdelwahab ◽  
Mahendra Kumar Mohanty ◽  
Pradeepta Kumar Sahoo ◽  
Debaraj Behera ◽  
Ahmed Elsayed Mahmoud Fodah
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Models ◽  
Cobalt Nanoparticles ◽  
Cow Dung ◽  
Biogas Yield

scholarly journals Cobalt Nanoparticles To Enhance Anaerobic Digestion of Cow Dung: Focusing On Kinetic Models For Biogas Yield And Effluent Utilization

2021 ◽  
Author(s):  
Taha Abdelfattah Mohammed Abdelwahab ◽  
Mahendra Kumar Mohanty ◽  
Pradeepta Kumar Sahoo ◽  
Debaraj Behera
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Models ◽  
Logistic Models ◽  
Informed Choice ◽  
Hydrolysis Rate ◽  
Cow Dung ◽  
Experimental Measurements ◽  
Biogas Yield ◽  
Co Nanoparticles ◽  
The Impact

Abstract The impacts of Co nanoparticles (NPs) on the anaerobic digestion (AD) of cow dung were investigated using kinetic models (modified Gompertze, logistic, and first-order) and experimental measurements. The deviation between the predicted and measured data for biogas yield with modified Gompertze and logistic models were (0.66%-2.26%) and (1.43%-4.19%), respectively. The addition of Co NPs (1-3 mg/L) improved the hydrolysis rate (K) value by (66.66%-144%) compared with the control. Furthermore, effluent with Co NPs showed remarkable fertility (4.63%-5.32%). The combination of kinetic models and experimental measurements can effectively quantify the impact of Co NPs on AD performance and provide an informed choice for industrial production.

Solid-State Anaerobic Digestion for Methane Production from Corn Stalks with Stack-Pretreated

2011 ◽  
Vol 697-698 ◽  
pp. 326-330 ◽  
Author(s):  
S.X. Zhou ◽  
Y.P. Dong ◽  
Y.L. Zhang
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Methane Production ◽  
Biogas Production ◽  
Cow Dung ◽  
Cow Manure ◽  
Pretreatment Method ◽  
Biogas Yield ◽  
Microbial Pretreatment ◽  
Microbial Strains

Microbial pretreatment was applied to enhance biogas production from corn stover through solid-state anaerobic digestion, but the price of microbial strains is high. The objective of this study was to find the effects on biogas production by the naturally microbial pretreatment method. The highest cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained in B group (the pretreated corn straws with cow dung), which was 19.6% higher than that of the untreated samples. The D group（the pretreated corn straws with the sludge）cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained, which was 18.87% higher than that of the untreted samples. The biogas of D group increased to the range of 55%～60% methane content, while B group with the range of 75%～80%.The results indicated that the pretreated corn straws mixing cow manure can improve both the biogas production yield and the content of methane in CH4。

scholarly journals Anaerobic digestion of mixed dried fallen leaves by mixing with cow dung

2015 ◽  
Vol 50 (3) ◽  
pp. 163-168 ◽  
Author(s):  
MA Rouf ◽  
MS Islam ◽  
T Rabeya ◽  
Ak Mondal
Keyword(s):  
Anaerobic Digestion ◽  
Raw Materials ◽  
Maximum Yield ◽  
Total Solid ◽  
Cow Dung ◽  
Glass Bottle ◽  
Biogas Yield ◽  
Biogas Reactors ◽  
Biogas Reactor ◽  
Fallen Leaves

An investigation was carried out for the production of biogas from dry fallen leaves. The sample was collected from BCSIR campus of Dhaka in winter. The substrate was mixed leaves mainly mahogany (75%), eucalyptus (10 %) and rain tree (15 %) leaves. The study was carried out by whole leaves and crushed leaves directly followed by aerobic pretreatment at 8% total solid (TS) concentration. The raw materials were fed into two liter capacity glass bottle bio digester on batch basis for 60 days at ambient temperature. Different proportion of substrate and cow dung were mixed to get the optimum mix for maximum yield of biogas. The biogas reactor containing 6% crushed and pretreated leaves mixed with 2% cow dung (on 8% TS basis) gave maximum (0.199 l/g) biogas yield. The biogas yield from leaves without pretreatment was found to be too low (0.0106 l/g) for 8%. The COD reduction, VS reduction and methane composition of two biogas reactors have been determined where biogas yield were relatively higher. The maximum methane content of the biogas was found to be about 69.3%.Bangladesh J. Sci. Ind. Res. 50(3), 163-168, 2015

scholarly journals Kinetic Study on Biogas Production from Cabbage (Brassica oleracea) Waste and Its Blend with Animal Manure Using Logistic Function Model

2021 ◽  
pp. 34-43
Author(s):  
Christian C. Opurum
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Parameters ◽  
Goodness Of Fit ◽  
Biogas Production ◽  
Logistic Function ◽  
Gas Production ◽  
Cow Dung ◽  
Function Model ◽  
Biogas Yield ◽  
Significant Difference

This research paper aimed to evaluate the kinetics of anaerobic digestion (AD) of mixtures of cabbage waste (CW) with (Poultry dropping (PD) and Cow dung (CD). The study was conducted in 10L bio-digesters for 35 days under mesophilic conditions (25 - 35OC). Logistic function equation was used to simulate the experimental data to test for its goodness of fit and kinetic parameters namely: maximum biogas potential (Pb), the maximum biogas production rate (Rm), and the lag phase duration (λ) were estimated in each treatment. Chemical analysis showed that individual substrates possess characteristics that could support microbial activities in biogas production. The biogas yield in terms of added  volatile solids (VS) in decreasing order was as follows: 0.022, 0.018, 0.017, 0.014, 0.014 and 0.013 dm3/g VS for CW/CD 2:1, CW/PD3:1, CW/CD 1:1, CW alone, CW/PD1:1 and  CW/PD 2:1, respectively. A significant difference (P ≤ 0.05) in biogas yield was recorded in CW/CD 2:1 with 7.19 dm3 (53.29% increase). The kinetic parameters (Pb, Rm, and λ) for CW/CD 2:1 was 7.01 dm3, 1.58 dm3.d, and 2.29 days, respectively. This was followed by CW/PD 3:1 (5.84 dm3); with 24.92% increase in gas production and CW/CD 1:1 (5.42 dm3) with 15.53% increase relative to CW alone, 4.69 dm3. The digesters fed with CW/PD 1:1 and CW/PD 2:1 exhibited inhibitory effects on biogas production, with 7.51 and 2.05% decrease in gas yield, respectively. The logistic function model demonstrated a strong relationship between the experimental and model-predicted data. The high correlation coefficient (R2) ranging between 0.978 - 0.993 is evident. The model proved to be a useful tool in predicting anaerobic digestion and biogas production process.

scholarly journals Investigation on mesophilic anaerobic co-digestion of community waste and cow dung: effect of operating parameters

2019 ◽  
Vol 4 (6) ◽  
Author(s):  
KO Ansah Amano ◽  
E Appiah-Danquah ◽  
E Adom ◽  
AG Ntiri-Asiedu ◽  
ES Amoamah ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Ph Value ◽  
Cow Dung ◽  
Waste Generation ◽  
Batch Mode ◽  
Biogas Yield ◽  
Digestion Process ◽  
Ph Range

Management of waste is a key concern in several communities in Ghana. The exponential growth in waste generation imposes serious threats such as environmental pollution, health risk and scarcity of dumping site to our society. A large variety of organic rich materials inherent in this waste have high potential to be treated by the use of anaerobic digestion. In this study, eight (8) Laboratory scale biodigesters were used for the anaerobic co-digestion of household and market waste with cow dung as inoculum, controlled at a pH range of 6.53-7.04 and at a mesophilic temperature of 35±2˚C. The study was also conducted in batch mode at a hydraulic retention time of 21 days. The anaerobic co-digestion process was developed and optimized at varying feedstock to inoculum ratio to determine the potential biogas yield from each proportion. The results obtained indicate sample S8, containing market waste and inoculum in the ratio of 6:1 produced the optimum concentration of methane (51% v/v biogas) while the least was recorded by sample S2 primarily made up of market waste. ANOVA results show that the concentration of methane produced from the substrate is significantly affected by the hydraulic retention time and pH value of the anaerobic digestion process.

Evaluation of Biogas Production from Bio-Digestion of Organic Wastes

2020 ◽  
Vol 51 ◽  
pp. 217-227
Author(s):  
Oludare Johnson Odejobi ◽  
Oluwagbenga Abiola Olawuni ◽  
Samuel Olatunde Dahunsi ◽  
Akinbiyi Ayomikusibe John
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Organic Wastes ◽  
Methane Content ◽  
Composition Analysis ◽  
Cow Dung ◽  
Biogas Yield ◽  
Animal Manures ◽  
Ph Range ◽  
Poultry Droppings

The present study evaluates the influence of kitchen wastes on animal manures via anaerobic digestion for biogas production. The digestion was done using a digester with a capacity of 5L. The digester was loaded with the slurry of wastes prepared by mixing the wastes with water in ratio 1:1, and operated at mesophilic temperature of 37 ± 2°C for 30 days. The co-digestion of kitchen wastes with poultry droppings produced highest biogas yield (814.0 ml/kg VS fed) and the least (365.84 ml/kg VS fed) was from the co-digestion of kitchen wastes with the mixture of poultry droppings and cow dung. Composition analysis of the biogas showed the highest methane content (63.1%) from kitchen wastes and the lowest (56.2%) from co-digestion of kitchen wastes with poultry droppings. The pH range for optimum biogas production varied between 5.25 and 7.5. The study concluded that biogas yield from co-digestion of substrates, among other factors depends on the composition of participating substrates.

Investigation of Biogas Production Using Organic Kitchen Wastes through Anaerobic Digestion

2015 ◽  
Vol 787 ◽  
pp. 97-101
Author(s):  
D. Thamilselvan ◽  
K. Arulkumar ◽  
M. Kannan
Keyword(s):  
Anaerobic Digestion ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Renewable Resource ◽  
Biogas Plant ◽  
Cow Dung ◽  
Fermentation Time ◽  
Ph Variation ◽  
Biogas Yield ◽  
Oil Crisis

The present day’sresearch interests on bioenergy have been expanded rapidly due to oil crisis of 1980s. This bio energy should be available in locally and it’spurer than the fossil fuels. The field of bio energyis important for governments, scientists and business people in worldwide because of its available in nature and renewable resource. Todays the most important renewable energy is Biomass. The biological conversion of biomass to methane has become rapidly increasing in present days. All types of organic wastes can be converted to methane. In this study the installed plant is a sintex floating type biogas plant. The cubic capacity of plant is about 1000 liter. The pH range is maintained in the level of 6.8 to 7.5. The fermentation time of the anaerobic digestion for the efficient usage of gas as a fuel is about 30 days. Our biogas plant is used for all types of anaerobic respirating wastes such as cow dung manure, kitchen wastes etc.The input feed of kitchen waste is about 10 kg per day. The output of the biogas yield is about 0.714 m3/kg. The composition of biogas is 50% to 60% of methane and rather than remaining 30% to 40% CO2and small amount of water about 2% to 5%. The performance characteristics of biogas plant are studied in this paper. To evaluate the performance of biogas production and pH variation throughout this study.

scholarly journals Biogas production from cow dungs using a modified fixed-dome digester

2021 ◽  
Vol 7 (3) ◽  
pp. 224-230
Author(s):  
Mtamabari Simeon Torbira ◽  
Ebigenibo Genuine Saturday
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Total Solid ◽  
Cow Dung ◽  
Biogas Yield ◽  
Carbon To Nitrogen Ratio ◽  
Temperature Range ◽  
Nitrogen Ratio ◽  
Design And Construction

A modified fixed dome digester with stirring mechanism has been designed and constructed and used for the anaerobic digestion of cow dung slurry at 5%-7% Total solid (TS) concentration within the mesophylic temperature range. The quality of biogas gas produced was between 54%-69% methane (CH4) content. The Carbon to Nitrogen ratio (C: N) varied between 35:1 - 45:1. Total biogas yield obtained over the detention period was about 261 L. The maximum and minimum temperatures recorded over the 95 days period was 32oC and 25 oC respectively. The volume of biogas yield, Vb (m3) was observed to increase with the percentage total solid, PTS (%). The details of the design and construction of the biogas digester plant and its cost are reported. The performance of the plant was very satisfactory. Investigation into the anaerobic digestion revealed that cow dung has great potentials for generation of biogas.

scholarly journals Evaluation of Biogas through Chemically Treated Cottonseed Hull in Anaerobic Digestion with/without Cow Dung: An Experimental Study

2021 ◽  
Author(s):  
Venkateshkumar R ◽  
Shanmugam S ◽  
Veerappan AR
Keyword(s):  
Anaerobic Digestion ◽  
Sodium Hydroxide ◽  
Calcium Hydroxide ◽  
Biogas Production ◽  
Cow Dung ◽  
Batch Reactors ◽  
Biogas Yield ◽  
Cottonseed Hull ◽  
Pre Treatment ◽  
Feedstock Material

Abstract Cow dung is generally used as the feedstock material for the anaerobic digestion to produce biogas. A selection of alternate biomass material is needed to reduce the consumption or to eliminate the use of cow dung. Recently, cottonseed hull has been considered as the primary substrate to produce biogas. In this paper, the effect of biogas production on anaerobic co-digestion of cow dung with pre-treated cottonseed hull using different concentrations of sulfuric acid, hydrochloric acid, hydrogen peroxide, and acetic acid is investigated. Sodium hydroxide and calcium hydroxide are used at different concentrations for pre-treatment of cottonseed hull. The enhancement of biogas production from the batch reactors at mesophilic temperature (35 ± 2 ℃) is observed for mono- and co-digestion of cow dung with treated cottonseed hull. Maximum biogas yield is achieved for the treated cottonseed hull at 6% sodium hydroxide during mono digestion and at 6% calcium hydroxide during co-digestion.

scholarly journals Optimization of Biogas Generation from Press Mud in Batch Reactor

1970 ◽  
Vol 45 (4) ◽  
pp. 371-376 ◽  
Author(s):  
MA Rouf ◽  
PK Bajpai ◽  
CK Jotshi
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Key Words ◽  
Batch Reactor ◽  
Maximum Yield ◽  
Cow Dung ◽  
Press Mud ◽  
Biogas Yield ◽  
The Press ◽  
Sugar Mills

Press mud collected from sugar mills in Punjab, India were characterized and found to contain 75-80% organic matter, which mainly consists of cellulose, hemicellulose, lignin, protein, sugar, wax, etc. Biogas generation from press mud in a 2-litre batch reactor was studied at solid concentrations of 4 to 12%. Maximum yield of biogas was 0.24 L/g with 6% solids. Effect of Co++ and Ni++ concentrations on biogas yield was also studied. It was maximum at 5 μ moles/L of Co++ and 6 μ moles/L of Ni++. The optimum C/N ratio for biogas generation was 18, which was higher than the normal C/N ratio of 14 in the press mud. Other substrates such as cow dung, bagasse and cane pith when mixed with press mud in different proportions have influenced biogas generation. Press mud when mixed with cow dung, biomethanation process became more stable. Particularly, cane pith when mixed with press mud in 1:1 ratio, the generation of biogas increased significantly. The methane content of the biogas was about 65%. Key words: Anaerobic digestion; Press mud; Biogas DOI: 10.3329/bjsir.v45i4.7383 Bangladesh J. Sci. Ind. Res. 45(4), 371-376, 2010

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