Biogas Production from Vegetable and Fruit Markets Waste—Compositional and Batch Characterizations

Polo, Carlos Morales; Castro, María del Mar Cledera; Soria, Beatriz Yolanda Moratilla

doi:10.3390/su11236790

Cited by 35 publications

(20 citation statements)

References 43 publications

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“…Food waste generation continues even at the final stage (bad storage or preservation). These substrates are highly suitable to be treated by anaerobic digestion because of high moisture content and solid and simple carbohydrates [8]. Numerous organic waste recycling methods have been reported, however, none of these methods can eliminate the whole food waste problem in modern cities.…”

Section: Introductionmentioning

confidence: 99%

Co-Fermentation of Food Waste and Municipal Sludge from the Saudi Arabian Environment to Improve Lactic Acid Production by Lactobacillus rhamnosus AW3 Isolated from Date Processing Waste

2020

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Food waste and municipal sludge were used as the substrates for the biosynthesis of lactic acid in a batch fermentor. The probiotic bacterial strain Lactobacillus rhamnosus AW3 isolated from date processing waste was used to produce lactic acid in a batch fermentor. Co-fermentation enhanced the biosynthesis of lactic acid and decreased substrate inhibition more than mono-substrate fermentation. A maximum yield of 28.4 ± 0.87 g/L of lactic acid was obtained through co-fermentation of food waste and municipal sludge at an optimized ratio of 2:0.5. Lactic acid production was improved by the supplementation of fructose, peptone, and sodium dihydrogen phosphate at pH 5.5 after 48 h fermentation. This production was approximately three-fold higher than that during mono-fermentation of food waste. The tested bacterial strains were obtained from the Microbial Type Culture Collection (MTCC). Lactic acid showed potent antimicrobial activity against pathogenic organisms, such as Bacillus subtilis MTCC 5981 (14 mm), Staphylococcus aureus MTCC 737 (20 mm), Pseudomonas aeruginosa MTCC 424 (24 mm), Enterobacter aerogenes MTCC111 (19 mm), Escherichia coli MTCC 443 (18 mm), Penicillium chrysogenum MTCC 5108 (19 mm), and Aspergillus niger MTCC 282 (19 mm). The antimicrobial properties of lactic acid have significant potential to inhibit the growth of pathogenic bacteria and fungi and improve probiotic properties. The lactic acid extracted from L. rhamnosus AW3 decreased the pH value of soil (p < 0.01) and increased the availability of soil phosphorus (p < 0.01). These findings demonstrate the bioconversion of food waste and municipal sludge into lactic acid, and the recycling of food wastes in urban areas to enhance soil nutrients.

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Section: Introductionmentioning

confidence: 99%

Co-Fermentation of Food Waste and Municipal Sludge from the Saudi Arabian Environment to Improve Lactic Acid Production by Lactobacillus rhamnosus AW3 Isolated from Date Processing Waste

2020

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“…Later, for the 15 th to 30 th day of digestion, the gas production rate was mostly consistent at 50 -100 ml/day for each mode of inoculum. This consistent gas production rate resulted from a stable digestion process when the process was not inhibited at all from 15 th to 30 th day [16].…”

Section: Biogas Yield At Single and Mixed Inoculummentioning

confidence: 62%

Effect of Single and Mixed Inoculum on Biogas Yield During Dry Anaerobic Digestion of Organic Municipal Solid Waste

Hossain

Rahman

Karim

et al. 2021

Chem. Eng. Res. Bull.

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Organic municipal solid waste (OMSW) - a potential energy source - is creating serious environmental hazards across Bangladesh, but it can be digested for biogas production to meet the ever-increasing energy demand of the country. The present study applied the dry anaerobic digestion (DAD) process for biogas production from OMSW with inoculum cow manure (CM) and anaerobic sludge (AS) in single and mixed modes. The performance of the DAD process was evaluated in batch digesters with a multilayer inoculum flow pattern maintained at the constant mesophilic condition of 37 °C. Firstly, CM and AS were studied individually, and later on, both of them were used together in different ratios (AS:CM = 1:1, 1:2, 1:3, and 2:1) to maximize the biogas yield from the DAD process. CM alone produced a total of 2.91 ml biogas/ g of biomass over 35 days of DAD while this yield was increased to 3.19 ml/g for mixed inoculum at the ratio of 1:3. These results imply that mixed-mode inoculums would be a promising option in the DAD process for biogas production which will reduce both the energy scarcity and the burden of municipal solid waste (MSW) management. Chemical Engineering Research Bulletin 21(2020) 77-81

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“…Anaerobic Digestion (AD) is a biological process in which, by the action of specific microorganisms, and under anaerobic conditions (in absence of air and oxygen), the organic matter of a substrate is transformed into biogas, a mixture, predominantly methane (CH 4 ). The residue and by-products of fruit and vegetable markets are an ideal substrate due to their moisture and high organic content, as has been shown in previous research [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Energy Recovery in Form of Biogas, from Vegetable and Fruit Wholesale Markets By-Products and Wastes, with Pretreatments

Polo

Castro

Aramburu

et al. 2021

Plants

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Residues and by-products from vegetables and fruit wholesale markets are suitable for recovery in the form of energy through anaerobic digestion, allowing waste recovery and introducing them into the circular economy. This suitability is due to their composition, structural characteristics, and to the biogas generation process, which is stable and without inhibition. However, it has been observed that the proportion of methane and the level of degradation of the substrate is low. It is decided to study whether the effect of pretreatments on the substrate is beneficial. Freezing, ultrafreezing and lyophilization pretreatments are studied. A characterization of the substrates has been performed, the route of action of pretreatment determined, and the digestion process studied to calculate the generation of biogas, methane, hydrogen and the proportions among these. Also, a complete analysis of the process has been performed by processing the data with mathematical and statistical methods to obtain disintegration constants and levels of degradation. It has been observed that the three pretreatments have positive effects, when increasing the solubility of the substrate, increasing porosity, and improving the accessibility of microorganisms to the substrate. Generation of gases are greatly increased, reaching a methane enrichment of 59.751%. Freezing seems to be the best pretreatment, as it increases the biodegradation level, the speed of the process and the disintegration constant by 306%.

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Biogas Production from Vegetable and Fruit Markets Waste—Compositional and Batch Characterizations

Cited by 35 publications

References 43 publications

Co-Fermentation of Food Waste and Municipal Sludge from the Saudi Arabian Environment to Improve Lactic Acid Production by Lactobacillus rhamnosus AW3 Isolated from Date Processing Waste

Co-Fermentation of Food Waste and Municipal Sludge from the Saudi Arabian Environment to Improve Lactic Acid Production by Lactobacillus rhamnosus AW3 Isolated from Date Processing Waste

Effect of Single and Mixed Inoculum on Biogas Yield During Dry Anaerobic Digestion of Organic Municipal Solid Waste

Enhancing Energy Recovery in Form of Biogas, from Vegetable and Fruit Wholesale Markets By-Products and Wastes, with Pretreatments

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