scholarly journals Isolation of hydrogen generating microflora from cow dung for seeding anaerobic digester

2006 ◽  
Vol 31 (6) ◽  
pp. 708-720 ◽  
Author(s):  
K VIJAYARAGHAVAN ◽  
D AHMAD ◽  
M KHAIRILBINIBRAHIM ◽  
H NAEMMAHBINTIHERMAN
Keyword(s):  
Anaerobic Digester ◽  
Cow Dung

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 PENGARUH WAKTU FERMENTASI DAN KOMPOSISI LIMBAH KULIT BUAH AREN (Arenga pinnata) DENGAN STARTER KOTORAN SAPI TERHADAP BIOGAS YANG DIHASILKAN

2015 ◽  
Vol 4 (3) ◽  
pp. 47-51
Author(s):  
Deril Clinton ◽  
Netti Herlina
Keyword(s):  
Biogas Production ◽  
Liquid Waste ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Anaerobic Digester ◽  
Cow Dung ◽  
Economic Potential ◽  
Standard Quality ◽  
Leather Waste

Sugar palm or commonly called as Aren (Arenga pinnata) is a multipurpose crop. The widely use of sugar palm for  food industries, generates sugar palm leather waste which can be used as a biomass for biogas production. This study aims to determine the quality and the quantity of biogas made from a mixed of sugar palm leather waste and water using batch anaerobic digester system and to evaluate the economic potential of biogas production from the mixture. Research carried out by mixing sugar palm leather with water in a ratio of 1:13; 1:11,5; 1:10; 1:9; and 1:8 (w/w) with cow dung as a starter mixed with water in an anaerobic digester batch system. Observed variables are biogas, biogas composition, Total Suspended Solid (TSS) and Chemical Oxygen Demand (COD) and analyzed fermentation slurry for every 3 days. pH for this study is set in the range of 6,4-8. The largest volume of biogas production is found at a ratio 1:11,5 (w/w)  mixture of sugar palm leather and water that is 637 mL for total waste 1,5 L with 60,983 % methane contain. TSS removal percentage obtained was 88,10 %and percentage of COD removal by 82,43%. Slurry produces unqualified TSS and COD with the standard  quality of liquid waste. The economic potential of sugar palm leather waste and water for producing biogas is beneficial.

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.

scholarly journals The effect of loading rate to biogas production rate of the 500 liter anaerobic digester operated with continuous system

2019 ◽  
Vol 120 ◽  
pp. 02004 ◽  
Author(s):  
I Ketut Adi Atmika ◽  
I Ketut Adi Atmika ◽  
Kadek Sebayuana ◽  
Tjokorda Gde Tirta Nindhia ◽  
I Wayan Surata ◽  
...  
Keyword(s):  
Production Rate ◽  
Waste Treatment ◽  
Loading Rate ◽  
Biogas Production ◽  
Continuous System ◽  
Anaerobic Digester ◽  
304 Stainless Steel ◽  
Cow Dung ◽  
The One ◽  
Biogas Production Rate

Conventional anaerobic digester such as fixed dome and floating drum are found having drawback in application in developing country. It was difficult in maintenance and operation. It was also difficult to relocate to the new site of waste processing. The portable anaerobic digester is prepared in this work as a solution. The capacity is about 500 liter so that suitable for home scale organic waste treatment. The material that is used for the digester was 304 stainless steel. The digester is completed wit agitator to optimize the biogas production. A slurry of cow dung (50% cow dung+ 50% water) is use to feed the digester. There are 2 variations of slurry loading rate that were investigated in this work, namely 5 liter slurry/day and 10 liter slurry/day. The biogas production rate is found about 51.7 liter biogas/day if loading with 5 liter slurry/ day. The biogas production rate is found increase significantly to become 82 liter biogas/day if loading with 10 liter slurry/day. The quality of biogas is found better with loading rate 5 liter slurry/day which has average CH4 content about 58.75% vol. comparing the one with loading rate 10liter slurry/day that have average CH4 content about 56.40% vol.

scholarly journals Analysis of the effect of internal gas pressure of an anaerobic digester on biogas productivity of a mixture of cow dung and tofu liquid waste

2021 ◽  
Author(s):  
Amaliyah Rohsari Indah Utami ◽  
Ravanska Alfaresa Ryantara ◽  
Erni Dwi Sumaryatie ◽  
Indra Chandra
Keyword(s):  
Liquid Waste ◽  
Anaerobic Digester ◽  
Gas Pressure ◽  
Cow Dung ◽  
Biogas Productivity

scholarly journals STUDY ON CO-FERMENTATION OF COW DUNG AND GIANT DIRT IN SEMI-CONTINUOUS ANAEROBIC DIGESTER

2018 ◽  
Vol 54 (2A) ◽  
pp. 287
Author(s):  
Nguyen Le Phuong
Keyword(s):  
Anaerobic Digester ◽  
Pistia Stratiotes ◽  
Cow Dung ◽  
Two Stage ◽  
One Stage ◽  
Input Material ◽  
Mixing Rates ◽  
Set Up ◽  
The One ◽  
Two Stages

Study on co-fermentation of cow dung (CD) and giant dirt (GD - Pistia stratiotes L.) in semi-continuous anaerobic digester aims to test biogas quantity and quality by time. Three mixing rates counted based on ODM of each material were chosen: 100 %CD, 50 %CD + 50 %GD, and 100 %GD. The experiments were set up in laboratory conditions with two types of digesters: one-stage digesters and two-stage digesters (triplicate for each treatment). After 80 days, the biogas produced from the one-stage digesters was not significantly different to the two-stage digesters with similar input material. The highest production of biogas came from digesters of 100 %GD - 235.8 L for the one-stage and 240.3 L for the two-stages. The medium production came from digesters of 50 %CD + 50 %GD - 127.8 L for the one-stage and 118.4 L for the two-stages. After one month, the percentage of CH4 was high enough for burning and almost giant dirt was digested that limited of a blockage inside the digesters. The results showed that co-fermentation of GD and CD is an alternative for livestock raising households to produce biogas for energy purpose.

scholarly journals PENGARUH WAKTU FERMENTASI TERHADAP VOLUME GAS BIO DAN PENYISIHAN COD DENGAN METODE PERLAKUANAWAL MENGGUNAKAN KALIUMHIDROKSIDA(KOH) PADA ECENG GONDOK (Eichhornia crassipes)

2016 ◽  
Vol 5 (2) ◽  
pp. 49-54
Author(s):  
Setiaty Pandia ◽  
Amin Trisnawati
Keyword(s):  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Fermentation Process ◽  
Biogas Production ◽  
Anaerobic Digester ◽  
Cod Removal ◽  
Cow Dung ◽  
Treatment Methods ◽  
Batch System ◽  
Pre Treatment

The purpose of this study was to determine the effect of alkali pre-treatment methods on the quality and quantity of biogas. The study was doneby fermentation process the water hyacinth with KOH in a concentration of 6,7 M; 4 M;3 M; and 2,95 (M) with water in ratio hyacinth: water 70:30; 50:50; 30:70 and 100:0 (v/v) mixed with cow dung starter in an anaerobic digester batch system of 2,5 L capacity.  In this study the highest biogas production at KOH concentration  4 M was in ratio of 50:50 (v/v)with yield biogas volume  449 mL and 86,52% of COD revomal, 92,42% of TSS removal. The lowest biogas production at KOH concentration 6,7 M was in ratio of 70:30 (v/v) with yield biogas volume 132 mL and 86,55% of COD removal and 88,65%of TSS removal.

scholarly journals Design of a Community-Based Anaerobic Digester for Sustainable Solid Waste Management in Ile-Oluji Ondo State Nigeria

2021 ◽  
pp. 80-91
Author(s):  
R. I. Areola ◽  
O. O. Ipindola
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Solid Waste Management ◽  
Climatic Conditions ◽  
Anaerobic Digester ◽  
Design Parameters ◽  
Cow Dung ◽  
Community Based ◽  
Physico Chemical ◽  
Ondo State

Aim: A Community-Based Anaerobic Digester was designed in this study for sustainable solid waste management in Ile-Oluji, Ondo state Nigeria. Methodology: Waste samples were collected from selected households for a period of one month and the components and percentage composition were determined. Afterwards, the physico-chemical characteristics of the substrate was investigated and the result used to design a community-based anaerobic digester. Results: The quantity, components and characteristics of waste generated was determined. The rate of waste generation was found to be 0.2kg/capita/day while the organic fraction of the total waste generated was found to be 55.7%. Physico-chemical characterization of the substrate was also investigated.  The pH was found to be 6.36 ± 0.18, while the alkalinity 692.81 ± 78.62.  The moisture content was found to be in the range of 71.20 ± 4.63%. Total solid was in the range 38.91 ± 5.25 while volatile solid was found to be 26.44 ± 2.83. carbon oxygen demand was found to be 834.33 ± 12.61, total phosphorus was in the range 4.20 ± 0.33. The Carbon on a dry weight basis was found to be in the range 60.41 ± 2.38, while nitrogen was found to be 4.79 ± 1.03. The C/N ration was found to be 21.61. The biogas yield ranged from 0 – 320 cm3 and 0 – 380cm3 per litre of substrate for biodegradable-only samples and biodegradable-cow dung samples respectively, for a forty days period of retention. The cylindrical dome type biogas digester was chosen for this study because of its simplicity in design and maintenance coupled with lower set up cost. The optimum volume of hydraulic chamber and gas storage chamber were designed to be the same as 850m3. Volume of fermentation chamber and sludge layer were calculated to be 2014m3 and 246m3 respectively, while the height and diameter of the fermentation chamber were 7m and 17m respectively. Conclusion: Anaerobic digestion of the biodegradable fraction of solid waste is a viable alternative that government and non-government organizations can key into for the improvement of public health especially in developing countries. The standardization of digester design parameters may pose challenges because of varying climatic conditions and complex socio-economic factors across different geographical contexts. Solutions may have to be adapted and localized to achieve a sustainable world.

Generation and analysis of biogas from kitchen waste at a small scale

2020 ◽  
pp. 140-148
Author(s):  
Md. Kumail Naqvi ◽  
Mrinal Anthwal ◽  
Ravindra Kumar
Keyword(s):  
Food Waste ◽  
Total Solid ◽  
Small Scale ◽  
Cow Dung ◽  
Retention Period ◽  
Household Level ◽  
Replacement Model ◽  
The Everyday ◽  
Scale Experiment ◽  
Small Period

Biogas is the product of anaerobic vitiation of biodegradable matter. This paper focuses on the need of alternative and green sources of energy at a household level and how biogas produced from the everyday organic waste has the potential and possibility to replace LPG cylinders at houses, shops etc. and empower us to step towards an eco-friendly future. The purpose this small-scale experiment has been to find the perfect input matter that is easy to acquire and which produces the maximum amount of gas from minimum input and within small period of waste retention. Four different types of input waste material containing different quantities of cow dung and kitchen food waste were studied through individual experimental setups. Waste was mixed and kept at room temperature and the pH and total solid concentration of the samples were recorded on regular intervals. From the experiment it was found that the optimum yield of biogas at a small scale, based on the parameters such as retention period, pH and total solid con-centration can be obtained by the use of food waste form households and kitchens. The exact composition has been discussed in this paper. The energy generated by the small-scale generator has also been compared to that of an LPG cylinder and an LPG replacement model has also been presented.

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