scholarly journals "Enrichment of Biogas Production from Kitchen Waste and Cow Dung"

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Ravi kumar Goud
Keyword(s):  
Biogas Production ◽  
Cow Dung ◽  
Kitchen Waste

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.

Production of Biogas from Kitchen Waste with Inoculum and Study the Effect of Different Parameters

2019 ◽  
Vol 41 (4) ◽  
pp. 563-563
Author(s):  
Muhammad Sohail Bashir Muhammad Sohail Bashir ◽  
Aqsa Safdar Aqsa Safdar ◽  
Shoaib Zaheer Shoaib Zaheer ◽  
Abdul Rehman Farooqi Abdul Rehman Farooqi ◽  
Muhammad Jamil Muhammad Jamil
Keyword(s):  
Ph Value ◽  
Biogas Production ◽  
Weight Ratio ◽  
Cost Effective ◽  
Effect Of Temperature ◽  
Cow Dung ◽  
Kitchen Waste ◽  
Alternative Source ◽  
Agricultural Growth ◽  
Waste Mixture

Household kitchen waste quantity is increasing rapidly because of the population explosion. Agricultural growth and intensive animal farming are generating a large quantity of bio waste. Disposing of this huge amount of waste is a serious environmental issue of the world. This waste can be used as an alternative source for the generation of green fuel by converting it to biogas. Though, a lot of work has been done on biogas production from conventional feedstock. However, it is highly desired to improve and optimize the process with kitchen waste used as feedstock. In this paper, cost-effective, environmentally friendly and high-quality biogas is produced by anaerobic digestion of kitchen waste mixture with inoculum. Inoculum is used as a source of microbial population. It is prepared by mixing of cow dung and water with a weight ratio of 1:5. The effect of temperature, pH, and the weight ratio of inoculum/kitchen waste on the production of biogas has been studied. The results indicated that the optimum pH value is 7.5 and for the maximum production of biogas temperature should be 37 ˚C. The optimum weight ratio of inoculum/kitchen waste is 60/40. The quality of biogas is improved by the absorption of CO2 from it with the aid of absorber contains 2 M solution of NaOH. The gas was burnt smoothly with a blue flame. This indicates the high content of CH4 in biogas. It is a green heating and cooking fuel and can be used for transport and power generation.

Comparative Study of Biogas Production from Five Substrates

2007 ◽  
Vol 18-19 ◽  
pp. 519-525 ◽  
Author(s):  
S.J. Ojolo ◽  
R.R. Dinrifo ◽  
K.B. Adesuyi
Keyword(s):  
Comparative Study ◽  
Biogas Production ◽  
Operating Conditions ◽  
Cattle Dung ◽  
Cow Dung ◽  
Vegetable Waste ◽  
Water Displacement ◽  
Kitchen Waste ◽  
Fruit Waste ◽  
Poultry Droppings

In this work, a comparative study of biogas production from poultry droppings, cattle dung, kitchen waste, fruit waste and vegetable waste was done under the same operating conditions. 3kg of each waste was mixed with 9kg of water and loaded into the 5 constructed digesters. Biogas production was measured using water displacement method for a period of 40 days and at an average temperature of 30.5oC. Results indicated that poultry droppings produced 0.0332dm3/day, cow dung produced 0.0238dm3/day, Kitchen waste produced 0.0080dm3/day, vegetable waste produced 0.0066dm3/day and fruit waste with 0.0022dm3/day. It is concluded that poultry droppings produced more biogas because it contains more nutrients and nitrogen compared with plant and other animal waste

scholarly journals Biogas Production from Anaerobic Digestion of Different Biodegradable Materials

2013 ◽  
Vol 13 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Tika Sapkota ◽  
Jagannath Aryal ◽  
Samir Thapa ◽  
Amrit B Karki
Keyword(s):  
Water Hyacinth ◽  
Biogas Production ◽  
Total Solid ◽  
Gas Production ◽  
Maximum Temperature ◽  
Biodegradable Materials ◽  
Cow Dung ◽  
Kitchen Waste ◽  
Eupatorium Adenophorum ◽  
Household Level

This study presents the feasibility of different biodegradable materials such as kitchen wastes, water hyacinth (Eichhornia sp.), green garden grass, banana (Musa acuminate) bases, Banmara (Eupatorium adenophorum) and cabbage leaves (Brassica oleracea var. capitata) for biogas production. The experiment was conducted using 0.05 m3 anaerobic bioreactor of ARTI model compact biogas technology under ambient temperature condition in Kathmandu. The minimum and maximum temperature recorded during the study period (March 1 to July 1, 2009) was ranged from 10°C to 33°C. Total solid was found maximum (39.72 percent) in kitchen waste and minimum in cabbage leaves (8.36 percent). Volatile solid was more than 75 percent in all substrates. Organic matter ranged from 34.85 to 68.11 %. Similarly, C/N ratio was found maximum (22.57:1) in kitchen waste. Variations were observed in pH values. It was recorded between 5.7 and 6.8 in the first month but above 7 after second month of the plant installation. Burning of gas was detected after 42 days in cow dung, 52 days in water hyacinth, 80 days in kitchen waste and 70 days in banana base, Banmara, garden grass and cabbage leaves. Similarly, methane concentration after 105 days of plant installation was found to be 53 percent in cow dung, 48.8 percent in kitchen waste, 49.4 percent in water hyacinth, 24.5 percent in banana base, 38.5 percent in Banmara and 41.5 percent in garden grass. Total gas production in four months was found maximum in water hyacinth (45 l/kg TS) and minimum in cabbage (25.78 l/kg TS). The gas production in cow dung, Banana base, Banmara, garden grass and kitchen waste was therefore 41.12 l, 31.14 l, 34.02 l, 27.78 l and 32.12 l per kg of TS respectively. The purpose of designing this micro ARTI model plant was to test the feasibility of selected biodegradable materials for biogas production to be relevant in household level. Nepal Journal of Science and Technology Vol. 13, No. 2 (2012) 123-128 DOI: http://dx.doi.org/10.3126/njst.v13i2.7724

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 Suitability of Macrophytes for Wastewater Treatment and Biogas Generation

2019 ◽  
Vol 9 (2S2) ◽  
pp. 16-18
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Cow Dung ◽  
Water Lettuce ◽  
Before And After ◽  
Almost All

In this paper three sustainable approaches are made in waste management option. Firstly primary treated domestic sewage is treated by aquatic macrophytes using duckweed, water hyacinth and water lettuce. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Nitrates are tested before and after. Result indicates in terms of water quality, almost all three plants shows same removal efficiencies. BOD and TSS removal efficiency is attained more than 95%. COD and TDS removal is reached upto 50% for almost all plants. Secondly the used aquatic macrophytes for wastewater treatment is again used for generation of biogas (water lettuce unit, duckweed unit, water lettuce unit). In addition to three aquatic macrophytes, sludge is collected from aquatic macrophyte unit for generation of biogas. Comparison is made with conventional cow dung biogas unit. Result indicates water lettuce and duckweed produce biogas at earlier stage itself and water hyacinth takes some time for starting of biogas production. This may be due to the structure and texture causes some time for decomposition. Sludge gives maximum biogas generation among all experimental setup. Also in this study cow dung did not give biogas more may be due to poor blend ratio of cow dung with water is one of the reason.

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