Production of Biogas from Mono- and Co-Digestion of Agricultural Waste (Cow Dung, Chicken Dropping, and Rice Husk)

2021 ◽  
pp. 45-60
Author(s):  
Musa Olusegun Arekemase ◽  
Isaac Aweda
Keyword(s):  
Rice Husk ◽  
Biogas Production ◽  
Agricultural Waste ◽  
Effective Means ◽  
Methanogenic Bacteria ◽  
Gas Production ◽  
Waste To Energy ◽  
Cow Dung ◽  
Materials Used ◽  
Bacteria And Fungi

This study focused on waste to energy technology that utilized mono- and co-digestion of cow dung (CD), chicken dropping (ChD), and rice husk (RH). The fabricated digesters were assessed for the influence of temperature and pH on biogas production from the materials used. The total aerobic bacteria and fungi counts for the mono- and co-digestion of cow dung with chicken droppings had highest number on day zero (1.5x107cfu/ml, 1.6x105cfu/ml and 1.4x108cfu/ml, 1.2x105, respectively), while the lowest counts were recorded on the 35th day (1.3x101cfu/ml, 1.0x101cfu/ml and 1.1x101cfu/ml, 1.0x101cfu/ml, respectively). The highest count of the acetogenic organisms was 1.8x105cfu/ml on the 18th day whereas no count was observed on the 35th day. Methanogenic bacteria had a count ranging from 1.0x 101 cfu/ml to 3.4x104cfu/ml on the 18th day. pH was within the range of 5.3 – 8.5 in the digesters. Cow dung  (100% CD) showed the highest cumulative gas production of 41.65m3 compared with chicken droppings (100% ChD) and rice husk (100% RH) which showed values of 8.91 m3 and 0 m3, respectively, within temperature. Furthermore, the co-digestion of 75% CD + 25% ChD, 50% CD + 50% ChD, 25% CD + 75% ChD, 50% CD + 50% RH, and 50% ChD + 50% RH produced biogas values of 20.1m3, 15.13m3, 7.51m3, 5.1m3, and 2.09m3, respectively, at the same temperature range of 36.2OC - 41.7OC. The assay for nitrogen (N), phosphate (P), potassium (K) and sulphate (S) to find the major plant nutrient from the digestate showed that 100% CD was richer in N (1.8mg/l), P (0.5mg/l), and S (0.5mg/l) than the other biomass types, whereas 50% CD 50% ChD had the highest content of P. The present study suggests that the digestion of cow dung, chicken droppings, and rice husk can be an effective means of waste management, pollution control, and generation of renewable energy (biogas) and fertilizers, thereby further strengthening the role of agriculture in the area of food security.

scholarly journals Microbial Dynamics and Biogas Production during Single and Co-digestion of Cow Dung and Rice Husk

2017 ◽  
pp. 67-76 ◽  
Author(s):  
Aderonke K. Akintokun ◽  
Wasiu A. Abibu ◽  
Moses O. Oyatogun
Keyword(s):  
Anaerobic Digestion ◽  
Rice Husk ◽  
Biogas Production ◽  
Methanogenic Bacteria ◽  
Cow Dung ◽  
Microbial Dynamics ◽  
Crude Fibre ◽  
Pseudomonas Spp ◽  
Bacillus Spp ◽  
Bacteria And Fungi

Anaerobic digestion is achieved by the combined effort of hydrolytic, acetogenic and methanogenic bacteria. Microbial dynamics and biogas production during anaerobic digestion of cow dung and rice husk were studied in this research. The experiment lasted for 30 days using a 10 L scale bio-digester. All proximate parameters reduced significantly after digestion for CD (cow dung), RH (rice husk), and CD:RH (cow dung and rice husk) except moisture content, which increased for all substrates. Ash content (1.08-1.67 mg) and crude fibre (1.27-1.96 mg) increased in CD only. The pH ranges for the substrates were CD (7.0-7.5), RH (6.1-7.6), and CD:RH (6.1-7.8). Temperature ranges were CD (27.4oC-33.5 oC), RH (27.2 oC-33.3 oC) and CD:RH (27.3 oC-33.4 oC). The total biogas production of the substrates and components of each gas produced were, CD (4327.65 cm3 : 62.4 % CH4, 37.4 % CO2, 0.2 % H2S), RH (150 cm3 : 100 % CO2), and CD:RH (4730.55 cm3 : 73.8 % CH4, 25.8 % CO2, 0.4 % H2S). Percentage distribution of the digester’s microflora include aerobes (40.75 %), anaerobes (31.25 %), fungi (25 %) and methanogenic bacteria (3 %). Hydrolytic bacteria and fungi isolated were Bacillus spp, Enterobacter spp, Pseudomonas spp, Proteus spp, Micrococcus spp, Aspergillus spp, Penicillium spp and Streptococcus spp. Acetogens isolated were Clostridium spp, Streptococcus sppand Pseudomonas spp. Methanococcus sppand Methanobacterium sppwere the only isolated methanogens. Rice husk produced the least amount of biogas.

scholarly journals The Study of Rice Husk as Co-Digestion Together with Cow Dung is Biogas Production of Anaerobic Digester

2018 ◽  
Vol 73 ◽  
pp. 01013 ◽  
Author(s):  
Sania Septiani Mulyawan ◽  
Dini Widyani Aghnia ◽  
Elisabeth Rianawati ◽  
Enri Damanhuri ◽  
Marisa Handjani ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Rice Husk ◽  
Positive Impact ◽  
Biogas Production ◽  
Waste To Energy ◽  
Cow Dung ◽  
Second Stage ◽  
Energy Technologies ◽  
Last Stage ◽  
Cellulose Concentration

One of alternative waste-to-energy technologies to treat organic waste is anaerobic digestion. This study conducted by three stage of experiments using the laboratory scale biogas production from cow dung and rice husk as co-digestion. Based on the first stage experiments, TS 10% gave the highest accumulation of biogas 458 ml and 506,95 ml. In the second stage of the experiments, 10 ml media in TS 20% gave the highest accumulation of biogas production (743.1 ml). The last stage of experiments showe d that Blank TS 30% with 5 ml media gave the highest accumulation of biogas production (922.2 ml). From the last stage we can conclude that the presented of rice husk as a co-digestion didn’t give the significant effect to increase biogas production in anaerobic digestion, at least at room temperature. This caused by the high lignin and cellulose concentration in the rice husk that might resist or inhibit the production of biogas production. This is contrast situation when TS 40% occured, the existing of rice husk in AD will give positive impact to biogas produce.

scholarly journals Design and Fabrication of a Modified Portable Biogas Digester for Renewable Cooking-Gas Production

2018 ◽  
Vol 3 (3) ◽  
pp. 21
Author(s):  
Barinyima Nkoi ◽  
Barinadaa Thaddeus Lebele-Alawa ◽  
Benedict Odobeatu
Keyword(s):  
Pressure Vessel ◽  
Storage Tank ◽  
Raw Materials ◽  
Gas Production ◽  
Smoke Detector ◽  
Cow Dung ◽  
Nickel Steel ◽  
Cylindrical Pressure Vessel ◽  
Test Pressure ◽  
Materials Used

This research paper focuses on re-engineering design and fabrication of a modified potable biogas digester for the production of biogas as a renewable energy source for domestic use. Digesters used around the world are commonly big in size. There is need to modify and re-engineer an existing biogas digester to fit in to modern day design for better efficiency, portability and safety. Floating drum and Flexible balloon are digesters to be modified as a thin walled pressure vessel with radius-thickness ratio  greater than 10. ASME codes and standards were used to carry out the sizing calculations, thickness and pressure calculations for the cylindrical pressure vessel shells and also calculations for the storage tank hemisphere shell. AISI 304 (Chromium-Nickel steel) is used for the vessel shell and the maximum allowable stress is 137 MPa. Weld efficiency (85%), corrosion allowance (0.02mm),  of 24 (for digester),  of 18 (for collector) and  of 20 (storage tank). 17 kg of cow dung and 34 kg of water with temperature of 32oC were the raw materials used for this research to produce a cumulative gas volume of 0.1243 m3 for 30 days. Furthermore, a bike pump is modified and used to increase methane gas pressure from 4.903 kPa to 345 kPa to suit the modern day gas cookers design and storage tank. Unlike other biogas plant, an electronic smoke alarm detector (model: Ei100) is placed 300 mm below the digester top for effective fire protection. Series of tests were performed to ensure that the constructed prototype met the specifications/standards. Such test include, smoke detector test, pressure testing, gas leak test, and a unit test run also confirmed that the aim of research was achieved.

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.

Biogas, its Use in North East India

2012 ◽  
Vol 622-623 ◽  
pp. 1213-1216
Author(s):  
R. Jahan
Keyword(s):  
Economic Analysis ◽  
Rural Economy ◽  
Crop Residues ◽  
Biogas Production ◽  
Gas Production ◽  
Cow Dung ◽  
North East India ◽  
North East ◽  
The North ◽  
Biogas Plants

The non conventional energy has derived mainly from the biomass which is utilized towards the sector of rural economy. The North-East India has consumed in from firewood cow dung and crop residues are used for gas production and it can replace much other energy oil from biogas production. The economic analysis of biogas plants has showed that the installation of biogas is economically very important. This paper throws light on the techniques of biogas production and its use in North-East India.

Potential of Biogas Production from Floating Aquatic Weeds

2013 ◽  
Vol 824 ◽  
pp. 467-472 ◽  
Author(s):  
M.A. Enaboifo ◽  
O.C. Izinyon
Keyword(s):  
Water Hyacinth ◽  
Laboratory Experiments ◽  
Biogas Production ◽  
Early Stage ◽  
Gas Production ◽  
Cow Dung ◽  
Aquatic Weed ◽  
Aquatic Weeds ◽  
Water Lettuce ◽  
Retention Period

This study investigates the potential of biogas production from water hyacinth, water lettuce and water fern. Laboratory experiments were carried out at the Faculty of Agriculture laboratory, University of Benin, Nigeria. The aquatic weeds which are major constituents of the substrate were contained in the conical flasks used as digester. The cow dung and aquatic weeds were mixed in the ratio of 1:1; 1:2; 1:3; 1:4; and 1:5 in the different samples used for each of the three aquatic weeds and gas produced measured.The results obtained showed that no gas was produced in any of the flasks containing the aquatic weed within 21days. Gas production was however recorded in those with cow dung alone which gave 302ml of biogas within the 21 days retention period with an average of 21ml of gas produced within the active 14 days of production. The results also showed variations in gas production between daytime and night hours with minimal gas production recorded at night hours and peak production during the daytime. It was concluded that cow dung requires shorter retention time to initiate production of biogas when compared with that of the aquatic weeds and therefore can be used to sustained biogas production in aquatic weed at the early stage.

scholarly journals Biogas production from renewable lignocellulosic biomass

2015 ◽  
Vol 4 (2) ◽  
pp. 341-347 ◽  
Author(s):  
Venkatachalam Sundaresan Gnanambal ◽  
Krishnaswamy Swaminathan
Keyword(s):  
Lignocellulosic Biomass ◽  
Biogas Production ◽  
Lignin Content ◽  
Methanogenic Bacteria ◽  
Cow Dung ◽  
Source Water ◽  
Lignocellulosic Waste ◽  
Displacement Method ◽  
Water Displacement ◽  
Different Characteristics

Effect of raw and biologically treated lignocellulosic biomass using cow dung slurry for biogas production is reported. Biomass is an energy source. Water containing biomass such as sewage sludge, cow dung slurry and lignocellulosic waste, has several important advantages and one of the key feature is renewability. Cow dung slurry has the potential to produce large amounts of biogas. Four categories of bacteria viz., hydrolytic, fermentative, fermentative acidogenic and acidogenic-methanogenic bacteria are involved in the production of biogas. The different characteristics of the cow dung slurry were determined according to standard methods. Hemicellulose, cellulose and lignin content of the lignocellulosic waste were also determined in our earlier studies. The substrates were digested under anaerobic condition for 5 days. The total biogas and methane produced during anaerobic digestion were estimated on 5th day. The total biogas produced during digestion was estimated by water displacement method. Biological methane production was estimated by using Saccharometer. DOI: http://dx.doi.org/10.3126/ije.v4i2.12662 International Journal of Environment Vol.4(2) 2015: 341-347

Producing Biogas with Two-Stage Fermentation Process of High Total Solids Content Kitchen Wastes

2012 ◽  
Vol 608-609 ◽  
pp. 344-349
Author(s):  
Xiao Ju Zhang ◽  
Shi Jie Li
Keyword(s):  
Fermentation Process ◽  
Biogas Production ◽  
Methanogenic Bacteria ◽  
Cow Dung ◽  
Kitchen Waste ◽  
Two Stage ◽  
Total Solids ◽  
Fermentation Tank ◽  
Solids Content ◽  
Biogas Process

This paper inoculated kitchen waste with activated sludge and fresh cow dung to explore the acidification and fermentation separated two-stage fermentation biogas process, in order to get acclimation acidification bacteria and methanogenic bacteria, high total solids content (TS) fermentation process, reduce the hydraulic load and shorten the fermentation cycle. The physiochemical characteristics of kitchen waste were that TS is 22.9%,the volatile solids (VS) is 11.7%, initial pH value is 6. The biogas producing process was as follow: Adjusting the TS of kitchen waste to 11.5% ,with 10% inoculum quantity, fermented at 37 °C , monitoring and adjusting pH. There were two biogas producing peak , and biogas production cycle was 15 days. The two-stage fermentation biogas process was as follow: Acidized the material of 22.9%TS for 5 days, Feeding the acidized material at the ratio of 1/4 to the vigorous biogas reaction system, then pH reduced but the biogas production was normal. After 5 days, pH raised and the second batch of material could be added. Feeding materials to the acidification tank and fermentation tank continuously, which can gradually get good acclimation acidification bacteria and methanogenic bacteria. Refluxing the biogas to acidification tank and methane fermentation tank, which can mix the materials evenly, shorten the fermentation cycle, improve the efficiency of the acidification and biogas production.

scholarly journals BIOGAS PRODUCTION FROM CO-DIGESTION OF SELECTED AGRICULTURAL WASTES IN NIGERIA

2015 ◽  
Vol 3 (11) ◽  
pp. 7-16
Author(s):  
Sambo ◽  
Etonihu ◽  
A. M. Mohammed
Keyword(s):  
Rice Husk ◽  
Crude Protein ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Mineral Elements ◽  
Gas Production ◽  
Agricultural Wastes ◽  
Banana Peel ◽  
Volatile Solids ◽  
Alternative Sources

The fear of depletion of fossil fuels and their attendant ecological effects and the high cost of renewable energy technology in Nigeria has triggered a need to develop alternative sources of energy, among which is biogas production. A slurry of 1 kg mixture of agro-waste feed stocks (plantain peel/rice husk, PP/RH; banana peel/plantain peel, BP/PP; and banana peel/rice husk, BP/RH) in 1:1 ratio was co-digested in locally fabricated digesters (10 L capacity). The experiment was run for 50 days and assessed for proximate content, biogas generation, organic matter, and mineral content in the digested and undi-gested agro-waste materials. The proximate composition showed that while banana peel had the highest moisture (56%), rice husk was highest in the content of ash (64%), crude protein (6.94%), and volatile solids (20%). The weekly cumulative biogas generation increased from 852.6 cm3 for BP/PP sample to 1049.7 cm3 for PP/RH sample for the 7 weeks at the experimental room temperature range of 29 oC to 35 oC. Sample PP/RH generated the highest volume of gas (biogas, methane, and others) compared to BP/RH and BP/PP samples.  In each case the volume of gas production decreased in week 7 from 271.4 cm3 to 152.0 cm3 (for biogas), 161.4 cm3 to 97.1 cm3 (for methane), and 110.0 cm3 to 54.9 cm3 (for other gases). The nutritional concentrations of the digested and undigested mixture of the waste samples after Atomic Absorption Spectrophotometer (AAS) and Flame Photometry showed that the digested samples had higher contents of the nutritional elements than the undigested samples. The mineral elements ranged from 0.554 mg/g in the undigested rice husk to 18.155 mg/g in the digested banana peel samples. Fermentation of agricultural wastes to generate biogas and sludge with agricultural value offers an al-ternative and efficient method of agricultural wastes and energy management in Nigeria.

scholarly journals The Effect of Solid-State Anaerobic Disgestion (Ss-Ad) and Liquid Anaerobic Disgestion (L-Ad) Method in Biogas Production of Rice Husk

2019 ◽  
Vol 1 (1) ◽  
pp. 5-17
Author(s):  
Budiyono Budiyono ◽  
Siswo Sumardiono ◽  
Fadillah Fathir Mahmud Fofana ◽  
Ihwan Fauzi ◽  
Agus Hadiyarto
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Rice Husk ◽  
Biogas Production ◽  
Agricultural Waste ◽  
Total Solid ◽  
Biological Pretreatment ◽  
Water Displacement ◽  
Daily Production ◽  
Volume Unit

Rice husk is one of the agricultural waste from rice crop residue which has high potential to be processed into biogas. The purpose of this research is to study the effect of solid state anaerobic digestion and liquid anaerobic digestion on biogas production from rice husk waste. The anaerobic digestion laboratory scale used in this experiment is operated in a batch system and at room temperature. This method is added with chemical and biological pretreatment that was NaOH and microbial consortium. Total solid (TS) was varied from 5%, 7%, 9%, 11% which is L-AD and 17%, 19%, 21%, 23% are SS-AD. Biogas results were measured using the water displacement method every two days to determine daily production. The results showed that with the addition of NaOH the total volume of biogas obtained by L-AD method (TS 9%) and SS-AD (TS 23%) were 1254 ml and 1397 ml. Production of biogas per unit of TS for L-AD method is 46,44 ml / grTS and for SS-AD is 20,246 ml / grts, while biogas production per reactor volume unit for L-AD method is 6,26 ml / ml reactor and for SS-AD method is 4.64 ml / ml reactor. The kinetics constant of biogas production with L-AD method obtained A, U, and λ respectively were 50,53 ml / grTS, 1.23ml / grTS.day, 11,71 day, while for SS-AD method obtained A, U , and λ respectively 21.07 ml / grTS, 0.6 ml / grTS.day, 6.2 days.

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