Investigation on Biogas Generation and Waste Minimization from Cow Dung by Anaerobic Digestion (original) (raw)
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Analysis of biogas production through anaerobics digestion using cow dung and various co-substrates
Thermal Science, 2016
Biodegradable waste is a sustainable energy resource. In coming years biogas technology can be very useful worldwide, since biogas can be obtained from biodegradable waste material. This technology is based on waste reduction and also is helpful in the clean-up process of India. In this experiment, we have made single-phase biogas setups by using two-liter bottles. The fermentation time of the anaerobic digestion for the efficient use of gas as a fuel is about sixteen days. In our biogas digester setups for waste decomposion anaerobic co-digestion process is utilized. The primary feed stock is cow dung, whereas the grass, fruit, and vegetable waste are used as co-subtracts. The pH value was maintained at the range level of 6.5 to 6.9. The output biogas yield was 1.59 ml, 1.28 ml, 1.03 ml, and 0.95 ml, within an approximate period of sixteen days. Biogas obtained from cow dung and grass waste is almost identical as biogas obtained from the experimental setup 1 (pure cow dung). Main performance characteristics of biogas formation were presented in this paper. In order to analyze a daily biogas formation, the pH value, temperature, and hydraulic retention time were changed in this experiment.
COMPARATIVE STUDY ON BIOGAS PRODUCTION FROM COW DUNG, FOOD WASTE AND ORGANIC WASTES
Anaerobic digestion is one of the ecofriendly methods to treat and dispose the biodegradable wastes and has more advantages when compared to any other waste treatment methods. Biogas production and composting of slurry from the biogas plant is one of the methods to reduce volume of waste (zero waste discharge) and maximum energy recovery from the organic wastes is possible. In this study the production potential of biogas from bio degradable organic wastes such as food waste, cow dung and fresh organic wastes under the same operating condition of room temperature between 28 º C to 32 º Care compared. A pilot plant of 0.3 cubic meter gas holding capacity is used as digester.
Anaerobic digestion of cow dung for biogas production
The effectiveness of cow dung for biogas production was investigated, using a laboratory scale 10L bioreactor working in batch and semi-continuous mode at 53 o C. Anaerobic digestion seemed feasible with an organic loading of up to 1.7 kg volatile solids (VS)/L d and an HRT of 10 days during the semi-continuous operation. The averaged cumulative biogas yield and methane content observed was 0.15 L/kg VS added and 47%, respectively. The TS, VS and COD removals amounted to 49%, 47% and 48.5%, respectively. The results of the VS/TS ratio showed very small variation, which denote adequate mixing performance. However there was some evidence of ammonia inhibition probably due to the uncontrolled pH employed. The data obtained establish that cow dung is an effective feedstock for biogas production achieving high cumulative biogas yield with stable performance. The future work will be carried out to study the effect of varying organic loading rate on anaerobic digestion of cow dung in a semi-continuous mode.
Experimental Investigation on the Effects of Digester Size on Biogas Production from Cow Dung
This paper presents the experimental investigation on the effect of digester size on biogas production. Experiments were carried out to produce biogas from different sizes of digester. 1.4 kg of cow dung was used to carry out the experiments. The temperature throughout the period of experimentation was within ambient temperature of 25 0 C to 35 0 C. It was observed that the pH values of the Digesters fluctuate between 5.4 and 7.6. This may be due to the activities of acid. Digesters A, B, C, D and E, with volumes of 250 ml, 500ml, 1000ml, 2000ml and 3000ml, produced a total biogas of 625 cm 3 , 715cm 3 , 1635cm 3 , 2082cm 3 and 2154cm 3 respectively. Digester size is an important factor which has a direct effect on the quantity of gas produced. For the total biogas produced per litre of digester size, Digesters A, B, C, D and E, produces 2500 cm 3 l-1 , 1430 cm 3 l-1 , 1635 cm 3 l-1 , 1041 cm 3 l-1 and 718 cm 3 l-1 respectively.
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.
2021
Biogas is a renewable energy resource produced by anaerobic digestion (AD). Biogas production trough anaerobic digestion was found to be unstable when the cattle manure is used as mono substrate due to the low carbon to nitrogen ratio. The aim of this research is to extract biogas by anaerobic-digestion technique using cow dung (CD) and municipal solid waste (MSW) at different proportions. It was carried out by 15, 0.5 L digesters at 38 °C using oven atmesophilic condition. Samples were analysed for its total solids (TS), volatile solids (VS), fixed solids, organic carbon, moisture content, and potential of hydrogen (pH) according to standard method for the examination of water and wastewater. Biogas yield was recorded by using volume displacement method. Maximum cumulative biogas production by the substrate mixes of 0% MSW+100% CD (2818.3 ml) and a maximum daily biogas production for 75% CD+25% MSW (620 ml) with minimum of 0 ml for all substrate mix at end of day 22. Cumulative bio...
Journal of Advances in Biology & Biotechnology
Aims: This study was carried out by analyzing the quantitative and qualitative of the biogas produced from cow dung by degrading mechanism. 32L of bioreactors was used for the study. Methodology: The bioreactors were constructed to imitate the fixed batch prototype. The study lasted for 30 days and it was carried out at the National Centre for Energy Research and Development, University of Nigeria,Nsukka. Slurry was prepared in bioreactors. The substrates in the bioreactors were water and cow dung (intestinal and abdominal waste). The pH, the total solids (TS), volatile solids (VS) and total volatile fatty acid (VFA) characteristics of the substrate before and after digestion were determined using standard method. Quantitative and qualitative analysis of biogas production was by liquid displacement and gas Analyzer methods Results: The results of the TS, VS and VFA were 400 mg/l, 92mg/l and 16.7 mg/l respectively in the predigested samples and 92 mg/l, 17.4mg/l and 28.3mg/l respecti...
The Production of Biogas Using Cow Dung and Food Waste
In Nigeria, the scarcity of petroleum supply particularly kerosene has become a national concern. Biogas technology has gained national interest. This research was to generate biogas using cow dung and food wastes. Food wastes (corn cobs and plantain peels at the ratio of 1;1) were collected from the Abia State Polytechnic canteen and cow dung from Aba North LGA slaughter house as feedstock for the anaerobic digestion system to produce biogas energy. This design was to combined feedstock with high caloric content and anaerobic microbes. The proximate composition revealed that the two feedstock contained energy yielding nutrients but at varying concentrations. The study revealed that the pH decreased possibly as the bacteria produce acids in the digester. The decrease was more observed in the cow slurry experiment as it recorded acidic at the 4 th day than the combined waste slurry which recorded acidic at 12 th days. The data showed the volume of biogas production in respect of number of days under the various slurry. It can be deduced from the data that gas production increased in the earlier days of the experiments and then started decreasing as acid concentration increases as indicated by the decrease in pH. This observation was more pronounced in combined waste slurry than the cow dung slurry. The result supported the observation that acid concentration greatly affects the biogas production. Thus the combined waste slurry produces more gas (30.58ml) than cow dung slurry (19.20ml) as food wastes contain more nutrients than the dung. It has been demonstrated by this study that by using combine feedstock (cow dung and food wastes) the efficiency of biogas generation can be increased.
The Potential of Biogas Production with Co-Digestion between Food Waste and Cow Dung
Trends in Sciences, 2021
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...