scholarly journals Increasing the biogas yield of a floating drum anaerobic digester using poultry droppings with banana (Musa Paradisiacal) peels

2020 ◽  
Vol 445 ◽  
pp. 012050
Author(s):  
K A Adeniran ◽  
A O Adeniran ◽  
T J Sanusi ◽  
D A Olasehinde
Keyword(s):  
Anaerobic Digester ◽  
Biogas Yield ◽  
Poultry Droppings

scholarly journals Effect of Hydraulic Retention Time on Biogas Production from Cow Dung in A Semi Continuous Anaerobic Digester

2018 ◽  
Vol 7 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Agus Haryanto ◽  
Sugeng Triyono ◽  
Nugroho Hargo Wicaksono
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Biogas Production ◽  
Stable Condition ◽  
Anaerobic Digester ◽  
Organic Loading Rate ◽  
Cow Dung ◽  
Biogas Yield ◽  
Average Analysis

The efficiency of biogas production in semi-continuous anaerobic digester is influenced by several factors, among other is loading rate. This research aimed at determining the effect of hydraulic retention time (HRT) on the biogas yield. Experiment was conducted using lab scale self-designed anaerobic digester of 36-L capacity with substrate of a mixture of fresh cow dung and water at a ratio of 1:1. Experiment was run with substrate initial amount of 25 L and five treatment variations of HRT, namely 1.31 gVS/L/d (P1), 2.47 gVS/L/d (P2), 3.82 gVS/L/d (P3), 5.35 gVS/L/d (P4) and 6.67 gVS/L/d (P5). Digester performance including pH, temperature, and biogas yield was measured every day. After stable condition was achieved, biogas composition was analyzed using a gas chromatograph. A 10-day moving average analysis of biogas production was performed to compare biogas yield of each treatment. Results showed that digesters run quite well with average pH of 6.8-7.0 and average daily temperature 28.7-29.1. The best biogas productivity (77.32 L/kg VSremoval) was found in P1 treatment (organic loading rate of 1.31 g/L/d) with biogas yield of 7.23 L/d. With methane content of 57.23% treatment P1 also produce the highest methane yield. Biogas production showed a stable rate after the day of 44. Modified Gompertz kinetic equation is suitable to model daily biogas yield as a function of digestion time.Article History: Received March 24th 2018; Received in revised form June 2nd 2018; Accepted June 16th 2018; Available onlineHow to Cite This Article: Haryanto, A., Triyono, S., and Wicaksono, N.H. (2018) Effect of Loading Rate on Biogas Production from Cow Dung in A Semi Continuous Anaerobic Digester. Int. Journal of Renewable Energy Development, 7(2), 93-100.https://doi.org/10.14710/ijred.7.2.93-100

scholarly journals Designing of lab-scale anaerobic digester equipped with maxblend impeller to evaluate effect of mixing on anaerobic digestion

2019 ◽  
Vol 4 (1) ◽  
pp. 404-413
Author(s):  
Singh Buta ◽  
Zoltán Szamosi ◽  
Zoltán Siménfalvi
Keyword(s):  
Anaerobic Digestion ◽  
Anaerobic Digester ◽  
Gas Composition ◽  
Operational Parameters ◽  
Biogas Yield ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Mixing Intensity ◽  
Enhance Efficiency ◽  
Gas Volume

Operational parameters can be easily controlled at lab scale experiments for an anaerobic digestion process. Our aim is to design a lab-scale digester equipped with an impeller to investigate how the geometry of impeller and different mixing modes effect the biogas yield of digester. Further, the methods of measuring the gas volume, gas composition, mixing intensity, torque, temperature are discussed in this article. The assembling of 4 liters digester is described which can be operated at various operating parameters which control the anaerobic digestion process. Mixing is very important to enhance efficiency of an anaerobic digester. To attain mixing Maxblend impeller is used in this lab-scale digester due to its better performance for mixing and power consumption. Various design consideration has been described.

scholarly journals EFFECTS OF CO-DIGESTION OF POULTRY DROPPINGS AND MAIZE COBS ON BIOGAS YIELDS AND SOME PROXIMATE PROPERTIES OF THEIR BY-PRODUCTS

2019 ◽  
Vol 3 (1) ◽  
pp. 1-13
Author(s):  
Chomini Meyiwa Stephen ◽  
Ameh Mariam ◽  
Osaseboh Osaze Florence ◽  
Chomini Akunna Emilia
Keyword(s):  
Alternative Energy ◽  
Progressive Increase ◽  
Metabolizable Energy ◽  
Unique Contribution ◽  
Crude Lipid ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Poultry Droppings ◽  
By Products ◽  
Maize Cobs

Purpose: The study focused on Co-digestion trials of poultry droppings and maize cobs in order to assess its effects on biogas yield and some proximate properties of their by-products.Methodology: Five different treatment ratios A(25:75), B(50:50), C(75:25), D(100:0) and E(0:100) of these wastes in triplicates were made into slurries (1:3w/v ratio) and separately fed to 13.6L locally fabricated digesters for 56 days retention time. There was a progressive increase in biogas yield across the treatments within the first six weeks of digestion, followed by a sharp decline at the 7th and 8th weeks.Findings: All co-substrates treatments had higher gas yields in the order of B(2481.30ml) > D(2197.90ml) > A(2163.00ml) > C(2116.30) > E(1713.20ml). The proximate contents gave E(763.60%), A(153.73%), B132.44%), C(79.37%), D(48.06%) as % increases in ash, while  %decreases in crude lipid and moisture  contents were  E (77.04, 21.02), B(72.70, 56.90), D(65.99, 40.94), A(65.70, 53.21) and C (56.83, 49.89), respectively. All but treatment D(5.74%) had % increases in crude protein. There was a general decrease in total solids(TS), volatile solids (VS), chemical oxygen demands (COD), metabolizable energy(ME). All co-substrates had higher % bioconversion efficiencies(%BE) over the singles with B(24.50%),  C(57.90%) and A(21.39%) highest values for TS, VS and ME  reduction, respectively. The % C/N reduction was in the order of  treatment E(81.80%)> A(68.02%)> B(54.42%),>C(54.23%) >D (12.94%).Unique contribution to theory, practice and policy: The process had revealed the alternative energy potentials and consequential implication on the biochemical composition of the effluents

scholarly journals The Utilization of Water Hyacinth for Biogas Production in a Plug Flow Anaerobic Digester

2020 ◽  
Vol 10 (1) ◽  
pp. 27-35
Author(s):  
Soeprijanto Soeprijanto ◽  
I Dewa Ayu Agung Warmadewanthi ◽  
Melania Suweni Muntini ◽  
Arino Anzip
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Biogas Production ◽  
Plug Flow ◽  
Anaerobic Digester ◽  
Yield Potential ◽  
Lag Phase ◽  
Cow Dung ◽  
Biogas Yield ◽  
Volatile Solids

Water hyacinth (Eichhornia crassipes) causes ecological and economic problems because it grows very fast and quickly consumes nutrients and oxygen in water bodies, affecting both the flora and fauna; besides, it can form blockages in the waterways, hindering fishing and boat use. However, this plant contains bioactive compounds that can be used to produce biofuels. This study investigated the effect of various substrates as feedstock for biogas production. A 125-l plug-flow anaerobic digester was utilized and the hydraulic retention time was 14 days; cow dung was inoculated into water hyacinth at a 2:1 mass ratio over 7 days. The maximum biogas yield, achieved using a mixture of natural water hyacinth and water (NWH-W), was 0.398 l/g volatile solids (VS). The cow dung/water (CD-W), hydrothermally pretreated water hyacinth/digestate, and hydrothermally pretreated water hyacinth/water (TWH-W) mixtures reached biogas yields of 0.239, 0.2198, and 0.115 l/g VS, respectively. The NWH-W composition was 70.57% CH4, 12.26% CO2, 1.32% H2S, and 0.65% NH3. The modified Gompertz kinetic model provided data satisfactorily compatible with the experimental one to determine the biogas production from various substrates. TWH-W and NWH-W achieved, respectively, the shortest and (6.561 days) and the longest (7.281 days) lag phase, the lowest (0.133 (l/g VS)/day) and the highest (0.446 (l/g VS)/day) biogas production rate, and the maximum and (15.719 l/g VS) and minimum (4.454 l/g VS) biogas yield potential.

In-situ microaeration of anaerobic digester treating buffalo manure for enhanced biogas yield

2022 ◽  
Vol 181 ◽  
pp. 843-850
Author(s):  
Iftikhar Zeb ◽  
Sana Yousaf ◽  
Muhammad Ali ◽  
Aqsa Yasmeen ◽  
Anwar Zeb Khan ◽  
...  
Keyword(s):  
Anaerobic Digester ◽  
Biogas Yield

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.

scholarly journals Investigation of the effects of starting pH, mass and retention time on biogas production using poultry droppings as feedstock

2020 ◽  
Vol 39 (1) ◽  
pp. 203-211
Author(s):  
O.A. Adebimpe ◽  
I.E. Edem ◽  
O.L. Ayodele
Keyword(s):  
Linear Regression ◽  
Retention Time ◽  
Biogas Production ◽  
Significance Level ◽  
Full Factorial Experiment ◽  
Biogas Yield ◽  
Specific Retention ◽  
Poultry Droppings ◽  
Log Linear ◽  
Full Factorial

The effect of starting pH, mass and retention time on biogas production was studied using poultry droppings as the feedstock. A full factorial experiment was designed and performed with starting pH set at 5, 6, 7, 8 & 9 for feedstock mass of 100g and 200g at specific retention times. The results presented an optimal biogas yield at pH=7 with a volume of 722 and 1046cm3 while pH=5 had the least with 255 and 481 cm3 at 100g and 200g mass respectively. The starting pH, mass and retention time and the interaction of starting pH and mass had significant effect on biogas yield at 5% significance level. The R-Square value obtained from the analysis was 92.1%. Thereafter, a log-linear regression model for predicting biogas yield was generated and was found to provide adequate prediction given its MAPE value of 19.97. Keywords: Biogas Production, Mass, Poultry Droppings, Retention Time, Starting pH.

Overall estimation of mesophilic high-rate anaerobic sludge digestion in internal circulation anaerobic digester integrated with sewage source heat pump

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Y. Jiang ◽  
J. Wu ◽  
L. Tian ◽  
L. Shi ◽  
Z. P. Cao
Keyword(s):  
Heat Pump ◽  
Low Cost ◽  
Treatment Plant ◽  
Anaerobic Digester ◽  
High Rate ◽  
Anaerobic Sludge ◽  
Internal Circulation ◽  
Biogas Yield ◽  
Coal Boiler ◽  
Sewage Source

Sewage source heat pump was integrated with internal circulation anaerobic digester (ICAD) to decrease the treatment cost of waste activated sludge. In the experiment, mesophilic digestion in ICAD was combined with thermal treatment at 60 °C with hydraulic retention time (HRT) of 1 day as pretreatment. The heat pump supplied heat recovering from the effluent of the wastewater treatment plant. The energy consumed by the heat pump was 39.2 and 48.6% less than the gas boiler and coal boiler respectively at a given amount of supplied heat. When the HRT of digestion was 10 days, the average total VSS removal and biogas yield rates of the system were 58.8% and 1.33 m3 · kgVSS−1 respectively. The integration of ICAD and sewage source heat pump offers a low-cost sludge treatment process with satisfactory organic removal.

scholarly journals Developing A Family-Size Biogas-Fueled Electricity Generating System

2017 ◽  
Vol 6 (2) ◽  
pp. 111 ◽  
Author(s):  
Agus Haryanto ◽  
Fadli Marotin ◽  
Sugeng Triyono ◽  
Udin Hasanudin
Keyword(s):  
Renewable Energy ◽  
Hydrogen Sulfide ◽  
Family Size ◽  
Thermal Efficiency ◽  
Pilot Scale ◽  
Anaerobic Digester ◽  
Methane Content ◽  
Gas Chromatograph ◽  
Biogas Yield ◽  
Generating System

The purpose of this study is to develop a family-size biogas-fueled electricity generating system consisting of anaerobic digester, bio-filter scrubber, and power generating engine. Biogas was produced from a pilot scale wet anaerobic digester (5-m3 capacity). The biogas was filtered using bio-scrubber column filled with locally made compost to reduce hydrogen sulfide (H2S) content. Biogas composition was analysed using a gas chromatograph and its H2S level was measured using a H2S detector. A 750-W four stroke power generating engine was used with 100% biogas. Biogas consumed by the generator engine was measured at different load from 100 to 700 W (13.3 to 93.3% of the rated power). Three replications for each load experiment were taken. Results showed that the total biogas yield was 1.91 m3/day with methane content of 56.48% by volume. Bio-filter successfully reduced H2S content in the biogas by 98% (from 400 ppm to 9 ppm). Generator engine showed good performance during the test with average biogas consumption of 415.3 L/h. Specific biogas consumption decreased from 5.05 L/Wh to 1.15 L/Wh at loads of 100 W to 700 W, respectively. Thermal efficiency increased with loads from 6.4% at 100 W to 28.1 at 700 W. The highest thermal efficiency of 30% was achieved at a load of 600 W (80% of the rated power) with specific biogas consumption of 1.07 L/Wh. Keywords: biogas; family size; generator; electricity; bio-filter. Article History: Received Janury 16th 2017; Received in revised form 2nd June 2017; Accepted 18th June 2017; Available onlineHow to Cite This Article: Haryanto, A., Marotin, F., Triyono, S., Hasanudin, U. (2017), Developing A Family-Size Biogas-Fueled Electricity Generating System. International Journal of Renewable Energy Develeopment, 6(2), 111-118.https://doi.org/10.14710/ijred.6.2.111-118

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