Analysis of biogas production through anaerobics digestion using cow dung and various co-substrates (original) (raw)
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The objective of this research was to analyze the potential of biogas production with co-digestion between food waste and cow dung. The experiment research was batched with small scale and scale up with semi-continuous, temperature was operated within 35 - 37 °C. The suitable condition for biogas production between food waste and cow dung was presented with 75:25 (T1). 55 mL of the biogas potential was obtained which is considered as small scale. Thus, the scale up was presented in 75:25 (T1) ratio. In term of scale up the biogas obtained from the production is 650 ml which is higher than small scale. The scale up reactor of biogas production was 100 liters. Chemical oxygen demand (COD) was reduced from 30,000 to 5,000 - 7,000 mL L-1. The efficiency of COD was obtained 76.67 - 83.3 %, respectively. In term of total solid, it was decreased from 19,000 to 16,500 mL L-1. Initial VFA was presented 4,000 mL L-1, and final was presented 3,800 mL L-1, respectively. However, the biogas prod...
African Journal of Environmental Science and Technology, 2018
Anaerobic co-digestion is one of the most promising auxiliaries for treating waste because of the high energy redemption. Bio-digester is designed and apparatus installed for anaerobic co-digestion of cow waste with crop residue in order to manufacture biogas. Gas production is measured by using water displacement method. The experimental results show that 1 kg of cow dung can produce about 15 to 30 L of biogas per day. By the addition of wheat straw, it yielded 20 to 60 L per day of gas. Bio-digester slurry consists of a blend of cow dung, crop residue, and inoculum in the ratio of 50:30:20 (50 kg cow dung: 30 kg wheat straw: 20 kg inoculums) by weight. Experimental analysis for measuring the different parameters affecting the processes like chemical oxygen demand, temperature and pH levels was carried out. Semi-flow through process was applied throughout the process of production in order to manage feedstock and effluent. The University of the Punjab annually produces 1670 kg/acre of crop residue and 1946 kg/day of cow dung, whereas, the total crop produce is 4130 kg/acre/annum. The result shows that by effectively utilizing the crop residue which is available seasonally as 20 to 60 L of bio gas yield per day, this can provide methane gas to laboratories of Punjab University.
Experimental Study of Biogas Production from Cow Dung as an Alternative for Fossil Fuels
Journal of Sustainable Bioenergy Systems, 2019
To treat the problem of fossil fuel usage and greenhouse gas emissions, biogas is considered a potential source of clean renewable energy. The aim of the work is to analyze the amount of biogas and ph from cow dung when an anaerobic digester operates in the mesophilic mode. In this study is presented the experimental investigation of biogas production from cow dung as an alternative energy resource. This is work using an 18 Liters capacity plastic as prototype biogas plant, plant to inspect the anaerobic digestion in producing biogas. The digester was batch operated and daily gas produced from the plant was observed for 30 days. The digester was fed within the ratio of 1:1 of dung to water respectively. The operating temperatures of the digester were maintained within mesophilic conditions. The Biogas production from cow dung fluctuates from the first day to the thirtieth day between 0 and 340 ml. The pH of cow dung is gradual reduction within the retention period.
American Journal of Environmental Sciences, 2013
Global warming caused by energy generation from fossil fuel has accelerated the deployment of renewable fuels such as biogas. In this study, batch fermentation (5L) was studied to observe the effect of natural water, cow dung, rice straw and water hyacinth ratio on the biogas and methane production at ambient temperature (31°C), 7.1-7.4 of pH for 52 days. The five types of co-digestion were 2:1:1:1 (digester A), 1:1:1:1 (digester B), 0.5:1:1:1 (digester C), 1:1:1:0 (digester D) and 1:1:0:1 (digester E), respectively. The result showed that the biogas production increased progressively with amount of natural water to raw material. The maximum biogas production and methane concentration was 1650 mL/days and 61.47% was obtained at substrate mixture 2:1:1:1 (digester A), which there are suitable of C:N ratio at 31.1:1. Natural water, cow dung, rice straw and water hyacinth was mixed for biogas production, have been found to improve highest biogas production compared to those of without rice straw and water hyacinth. Therefore, the mixing natural water, cow dung, rice straw and water hyacinth can improve both biogas production and content of methane in biogas.
Effect of co-digestion of food waste and cow dung on biogas yield
E3S Web of Conferences, 2020
This paper aims at finding the effect of co-digestion of cow dung and food waste on total biogas yield. Biogas production was improved through co-digestion of cow dung and food waste (FW) containing a small fraction of inoculum under mesophilic temperature (37ºC) over a retention time of 24 days. Co-digestion ratios of 1:1, 2:1 and 3:1 for cowdung/foodwaste were used for the study on anaerobic digestion on the co digested matter. Tests were carried out starting with the preparation of substrates, substrate characterization to determine the moisture content (MC), total solids (TS), volatile solids (VS) and ultimately batch anaerobic digestion experiments under thermophilic conditions (370C). The moisture content, volatile solids and total solids for food waste were 78, 22 and 90.7% respectively while the characteristics for cow dung were 67.2, 32.8 and 96.0 % respectively. From the study, a mixing ratio of cow dung: food waste of 1:2 was found to be the optimum substrate mixture for biogas production at 25595.7 Nml. The accumulated gas volumes of 18756.6, 14042.5, 13940.8 and 13839.1 Nml were recorded for cow dung: food waste ratios of 2:1, 1:1, 1:3 and 3:1 respectively. For a co-digestion containing more of the food waste than cow dung, a higher volume of biogas is produce.