Production of Biogas from Fruit and Vegetable Wastes Mixed with Different Wastes

Deressa, Leta; Libsu, Solomon; Chavan, R B; Manaye, Daniel; Dabassa, Anbessa

doi:10.13189/eer.2015.030303

Cited by 81 publications

(32 citation statements)

References 3 publications

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“…Similarly, the fruit and vegetable sample showed a sharp increase in the first 3 h up to 89 mL of gas per 1 g of dry matter of the sample. Then, from 3 to 24 h, the gas production rate slightly increased at a stable rate with maximum gas production of 166 mL of gas per 1 g of dry matter of the sample, similar to the conclusion obtained from Deressa et al 38 . Regarding bread waste samples, as discussed earlier, a high dry matter content was noted and hence a high organic matter content.…”

Section: Resultssupporting

confidence: 89%

Techno-economic evaluation of biogas production from food waste via anaerobic digestion

Al-Wahaibi

Osman

Al-Muhtaseb

et al. 2020

Sci Rep

114

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Food waste is a major constituent in municipal solid wastes and its accumulation or disposal of in landfills is problematic, causing environmental issues. Herein, a techno-economic study is carried out on the potential of biogas production from different types of food waste generated locally. The biogas production tests were at two-time sets; 24-h and 21-day intervals and results showed a good correlation between those two-time sets. Thus, we propose to use the 24-h time set to evaluate feedstock fermentation capacity that is intended for longer periods. Our approach could potentially be applied within industry as the 24-h test can give a good indication of the potential substrate gas production as a quick test that saves time, with minimal effort required. Furthermore, polynomial models were used to predict the production of total gas and methane during the fermentation periods, which showed good matching between the theoretical and practical values with a coefficient of determination R2 = 0.99. At day 21, the accumulative gas production value from mixed food waste samples was 1550 mL per 1 g of dry matter. An economic evaluation was conducted and showed that the case study breaks-even at $0.2944 per cubic metre. Any prices above this rate yield a positive net present value (NPV); at $0.39/m3 a discounted payback period of six years and a positive NPV of $3108 were calculated. If waste management fee savings are to be incorporated, the total savings would be higher, increasing annual cash flows and enhancing financial results. This economic evaluation serves as a preliminary guide to assess the economic feasibility based on the fluctuating value of methane when producing biogas from food waste via anaerobic digestion, thus could help biogas project developers investigate similar scale scenarios .

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Section: Resultssupporting

confidence: 89%

Techno-economic evaluation of biogas production from food waste via anaerobic digestion

Al-Wahaibi

Osman

Al-Muhtaseb

et al. 2020

Sci Rep

114

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“…Other studies investigated the production of biogas from mixtures of organic matter of animal and vegetable origin, incorporating avocado residues. For example, Deressa and colleagues studied the efficiency in the production of biogas from a mixture of vegetable waste, including avocado residual peels, which were mixed with cow manure; this resulted in 37 mL/g, without the need of nutrients or chemical addition to the system [53]. In a similar study, Kenasa and coworkers investigated the ideal conditions for the generation of biogas from the avocado peel.…”

Section: Biogas Through Biochemical Conversionmentioning

confidence: 99%

Avocado-Derived Biomass as a Source of Bioenergy and Bioproducts

2020

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The avocado (Persea americana Mill.) is a tree native to Mexico and Guatemala. Avocado consumption, fresh or in the form of processed products, is growing everywhere and it has caused a large number of countries to invest heavily in avocado production. The industrialization of avocado gives as a result a huge amount of waste, not only the peel and stone but also that waste generated by the pruning practices and oil extraction. These biomasses could be converted into raw materials to obtain different types of co-products, but this implies changes in the use of these resources, the design of efficient production systems, and integration to take full advantage of them, e.g., by developing biorefinery models. Therefore, this review firstly gives a snapshot of those residues generated in the avocado industry and provides their chemical composition. Secondly, this review presents updated information about the valorization ways of avocado-derived biomass to obtain bioenergy, biofuels, and other marketable products (starch, protein, phenolic compounds, and biosorbents, among others) using a single process or integrated processes within a biorefinery context. Green technologies to obtain these products are also covered, e.g., based on the application of microwaves, ultrasound, supercritical fluids, etc. As a conclusion, there is a variety of ways to valorize avocado waste in single processes, but it would be promising to develop biorefinery schemes. This would enable the avocado sector to move towards the zero-waste principle.

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“…During anaerobic digestion, through the metabolic action of methanogenic bacteria, wastes are converted biochemically into methane. The reactions are carried out by various groups of microbes at four different stages named hydrolysis, acidogenesis, acetogenesis and methanogenesis (Deressa et al, 2015;Mata-Alvarez et al, 2000;Ogunleye et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, there are few methods that are subjected to anaerobic digestion: singlephase digestion, two-phase digestion, dry fermentation and co-digestion (Deressa et al, 2015). Three major issues or difficulties have been reported, namely; the effect operational factors, the nutritional imbalance and lack of diversified microorganisms via direct utilisation of substrates or mono-substrates in anaerobic digestion (Hagos et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Livestock manure is the main organic waste that contains a high quantity of nitrogen (N) and phosphorus (P), a high percentage of these substances causes nutrient imbalance and failure to properly manage these wastes leads to environmental pollution (Chakravarty, 2016;Deressa et al, 2015). Bacteria found in cow dung are known to produce a high yield of methane gas (Gupta et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Anaerobic Co-digestion of Pineapple Wastes with Cow Dung: Effect of Different Total Solid Content on Bio-methane Yield

Hamzah

Mazlan

et al. 2020

Adv Agric Food Res J

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The abundance of agricultural wastes produced from pineapple processing and livestock industries has resulted in the difficulties of disposing of a large amount of waste. Anaerobic digestion is a way to reduce waste and generate renewable energy sources including biogas. In this study, pineapple waste is co-digested with cow dung in batch experiments under mesophilic temperature at 38±1°C at a working volume of 100 ml in 125 ml serum bottle. The effects of the total solid on methane yields are investigated at a different substrate ratio. The batch study is conducted at 3 different total solid which are 12%, 20% and 28% and at three different substrate ratio cow dung to pineapple waste (CD: PW) (1:1, 1:2 and 1:3). Daily biogas collection for 28% total solid at 1:1 ratio results in the highest cumulative biogas production of 313 ml, followed by 28% total solid at 1:3 ratio with 246 ml biogas yield. The highest methane yield is achieved at 12% total solid with a 1:2 ratio (17.19 CH4/g VS). Results show that at 12% total solid produces the highest methane yield at all ratios compared to other total solid percentages. Moreover, methane yield decreases as the total solid percentage increases from 12% to 28%. Overall, the production of methane from pineapple wastes co-digested with cow dung is proven to be a good strategy to minimise solid wastes.

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Production of Biogas from Fruit and Vegetable Wastes Mixed with Different Wastes

Cited by 81 publications

References 3 publications

Techno-economic evaluation of biogas production from food waste via anaerobic digestion

Techno-economic evaluation of biogas production from food waste via anaerobic digestion

Avocado-Derived Biomass as a Source of Bioenergy and Bioproducts

Anaerobic Co-digestion of Pineapple Wastes with Cow Dung: Effect of Different Total Solid Content on Bio-methane Yield

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