Optimization of biogas yield from anaerobic co-digestion of corn-chaff and cow dung digestate: RSM and python approach

Iweka, Sunday Chukwuka; Owuama, K. C.; Chukwuneke, J. L.; Falowo, Olayomi Abiodun

doi:10.1016/j.heliyon.2021.e08255

Cited by 38 publications

(30 citation statements)

References 28 publications

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“…11 Gaseous fuels such as biogas generate less pollution, which has been lauded by researchers and end users. 12 Biodegradable resources like food waste animal manure, agricultural waste are digested to produce biogas by anaerobic digestion. This gas contains methane (CH 4 ), carbon dioxide (CO 2 ), nitrogen (N 2 ), water (H 2 O), hydrogen (H 2 ; Traces), hydrogen sulfide (H 2 S), oxygen (O 2 ), and ammonia (NH 3 ).…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of biogas yield from dual organic waste using hybrid statistical approach and its effects on ternary fuel blend (biodiesel/n‐butanol/diesel) powered diesel engine

Ahmad

Yadav²,

Singh

et al. 2023

Env Prog and Sustain Energy

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Economic and environmental concerns have driven biofuel research in the last few decades. In order to this, biogas production is being encouraged on a worldwide scale to reduce carbon emissions and increase resource recovery from diversified wastes. The present contribution involves finding the best way to turn food waste and animal manure into biogas and its effective utilization in a dual‐fuel mode diesel engine. For the experimentation, a Taguchi approach was used to develop an L25 orthogonal array with three factors and five levels of parameters: cattle dung and food waste ratios, retention times, and digester temperatures. Using the response surface method (RSM), genetic algorithm (GA), and cuckoo search algorithm (CSA), the biogas yield was optimized and compared to get the best optimization technique. Based on the specific goals of the study, GA is the best combination of parameters for producing biogas. The optimal condition for producing biogas was a cattle dung and food waste ratio of 0:100 (wt/wt %) with a retention time of 15 days and a digester temperature of 40°C, and the corresponding value of the biogas yield was 551.633 mL/day. Experiments were done to confirm this prediction. This study also intends to determine the viability of ternary fuel blends (microalgae biodiesel, n‐butanol additive, and diesel) as a pilot fuel and biogas as a primary fuel by changing their mass flow rates (0.5, 1.0, and 1.5 kg/h) in the CI engine. The D70BD20Bu10 ternary fuel blend with 1.5 kg/h of biogas flow rate was found to be an optimum blend due to its improved performance and emission characteristics compared to other tested fuels. This fuel blending improves brake thermal efficiency (BTE) by 6.25% and reduces brake‐specific fuel consumption (BSFC) by 2.14%. NOx and smoke emissions were both reduced by 58.22% and 54.59%, respectively. However, HC and CO emissions were on the higher side compared to diesel.

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Section: Introductionmentioning

confidence: 99%

“…Gaseous fuels such as biogas generate less pollution, which has been lauded by researchers and end users 12 . Biodegradable resources like food waste animal manure, agricultural waste are digested to produce biogas by anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of biogas yield from dual organic waste using hybrid statistical approach and its effects on ternary fuel blend (biodiesel/n‐butanol/diesel) powered diesel engine

Ahmad

Yadav²,

Singh

et al. 2023

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Biogas can be produced from the fermentation of livestock manure such as cows, chickens, buffalo, pigs and others, the main component is methane gas (van Tran et al, 2022). Cow dung is a substrate that is considered the most suitable source of bio-gas production because the substrate already contains methane-producing bacteria found in the stomachs of ruminant animals (Iweka et al, 2021). The process of making biogas is by mixing dirt with water and then fermenting it (Kunatsa & Xia, 2021;Lahbab et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the difference in biogas volume between continuous and semi-continuous systems

Afisna¹,

Rahadi²

2022

JEREL

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The increasing demand for energy due to population growth and reduced sources of oil reserves puts pressure on every country to immediately produce and use renewable energy as a substitute, one of the alternative energy sources is biogas. The bacteria used in making this biogas is EM4, researchers used these bacteria because they can balance microorganisms. Microorganism inoculants consisting of 90% Lactobacillus produce cow dung are accommodated in a container made of HDPE plastic. The dimensions of the reservoir are 1 m3. Data collection was carried out starting from the first day to the fourteenth day. Retrieval of pressure data using a pressure gauge, temperature data retrieval using a thermometer gun and measuring the volume of biogas using an Arduino-based flow meter. From this study, it was found that biogas storage using HDPE polymer material with a size of 1x1 meters can accommodate a maximum biogas volume of 208.12 litres. In the non-continuous system, the volume of biogas produced is not stable with the total volume of biogas before going through the filter for 14 days is 1075.12 litres with an average volume of 76.79 litres/day while the total volume of biogas that has been through the filter for 14 days is 995.71 litres with an average volume of 71.12 litres/day.

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“…In the study of how variables affect a process, the interacting effect is very important. One of the most effective and robust statistical tools for studying the interactive influence of process variables is the Response Surface Methodology [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Process Optimization for Enhancing Yield and Quality of Bio-Oil from the Pyrolysis of Cow Hooves

Chukwuneke¹,

Sinebe²,

Orugba³

et al. 2022

IJDNE

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To reduce the environmental footprints of fossil fuels, there is a need to source more biomasses to increase the renewable energy supply. However, a critical study of the energy-conversion process of biomass must be carried out to make the process economical. In this research, the optimization of the bio-oil production from the thermal conversion of novel biomass- cow hoof was carried out. Three independent variables- temperature of pyrolysis, heating rate and CaO catalyst mass were studied at 3 levels based on the rotatable central composite design (CCD) of the response surface methodology (RSM) to ascertain their influence on two responses- bio-oil yield and its HHV. The quadratic model was more suitable to fit the experimental data. At optimum values of the process variables, bio-oil yield of 50.64% and HHV of 23.86 MJ/kg were obtained. From the analysis of variance carried out, the model R2 values were 0.9949 and 0.9802 respectively for the bio-oil yield and HHV models which showed the models’ ability to predict the bio-oil yield and its HHV in the pyrolysis process is high. The characterization of the bio-oil revealed it has better fuel properties compared with most bio-oils from some biomasses hence it is a viable renewable energy source.

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Optimization of biogas yield from anaerobic co-digestion of corn-chaff and cow dung digestate: RSM and python approach

Cited by 38 publications

References 28 publications

Enhancement of biogas yield from dual organic waste using hybrid statistical approach and its effects on ternary fuel blend (biodiesel/n‐butanol/diesel) powered diesel engine

Enhancement of biogas yield from dual organic waste using hybrid statistical approach and its effects on ternary fuel blend (biodiesel/n‐butanol/diesel) powered diesel engine

Analysis of the difference in biogas volume between continuous and semi-continuous systems

Process Optimization for Enhancing Yield and Quality of Bio-Oil from the Pyrolysis of Cow Hooves

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