Enhancement of anaerobic digestion by co-digesting food waste and water hyacinth in improving treatment of organic waste and bio-methane recovery

Oduor, William  Wasonga; Wandera, Simon M.; Murunga, Sylvia I.; Raude, James M.

doi:10.1016/j.heliyon.2022.e10580

Cited by 20 publications

(5 citation statements)

References 47 publications

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“…The high VS/TS of 0.89-0.95 indicates that all the tested cultivars were rich in organic matter and are considered as ideal substrates for biogas production. This result agrees with previous studies in which substrates with high VS/TS were rich in organic matter [42]. The carbon content in sweet sorghum cultivars was more or less similar (Table 1).…”

Section: Chemical Composition Of Sweet Sorghum Cultivarssupporting

confidence: 92%

Sweet Sorghum as a Potential Fallow Crop in Sugarcane Farming for Biomethane Production in Queensland, Australia

Mathias,

Edwiges,

Ketsub

et al. 2023

Energies

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Biogas from lignocellulosic feedstock is a promising energy source for decentralized renewable electricity, heat, and/or vehicle fuel generation. However, the selection of a suitable energy crop should be based on several factors such as biomass yields and characteristics or biogas yields and economic returns if used in biorefineries. Furthermore, the food-to-fuel conflict for the use of a specific energy crop must be mitigated through smart cropping techniques. In this study, the potential use of sweet sorghum as an energy crop grown during the fallow periods of sugarcane cultivation was evaluated. Nine sweet sorghum cultivars were grown on sandy loam soil during September 2020 in North Queensland, Australia. The overall results showed that the crop maturity had a profound influence on chemical composition and biomass yields. Further, the total insoluble and soluble sugar yields varied among the tested cultivars and were dependent on plant height and chemical composition. The biomass yields ranged from 46.9 to 82.3 tonnes/hectare (t/ha) in terms of the wet weight (w/w) of the tested cultivars, with the SE-81 cultivar registering the highest biomass yield per hectare. The gross energy production was determined based on the chemical composition and methane yields. Biochemical methane potential (BMP) studies in batch experiments at 37 °C showed that methane yields of 175 to 227.91 NmL CH4/gVSadded were obtained from the tested cultivars. The maximum methane yield of 227.91 NmL CH4/gVSadded was obtained for cultivar SE-35. However, SE-81 produced the highest methane yields on a per hectare basis (3059.18 Nm3 CH4/ha). This is equivalent to a gross energy value of 761.74 MWh/year or compressed biomethane (BioCNG) as a vehicle fuel sufficient for 95 passenger cars travelling at 10,000 km per annum. Overall, this study demonstrated that sweet sorghum is a potential energy crop for biogas production that could be cultivated during the fallow period of sugarcane cultivation in Queensland.

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Section: Chemical Composition Of Sweet Sorghum Cultivarssupporting

confidence: 92%

Sweet Sorghum as a Potential Fallow Crop in Sugarcane Farming for Biomethane Production in Queensland, Australia

Mathias,

Edwiges,

Ketsub

et al. 2023

Energies

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“…In addition, it was pointed out that the use of acids for the decomposition of plants reduced the accumulation of these compounds in the bioreactor and minimised the occurrence of the problem of over-acidification of the ferment, which in many cases ends up inhibiting the process. Similarly, Oduor et al ( 2022) proved that co-digestion of food waste and water hyacinth (WH) increased the C/N ratio of the feedstock and the buffer capacity of the digester [102]. These changes led to a decrease in the acidity of the environment, leading to an increase in the activity of methanogenic bacteria, which in turn allowed biogas production to be higher by 258.16 mL•g −1 VS and by 359.74 mL•g −1 VS, compared to the mono-digestion of FW and WH.…”

Section: Co-digestion Of Food Waste With Plants Plant Residues and Algaementioning

confidence: 99%

Anaerobic Digestion of Food Waste—A Short Review

Pilarska,

Kulupa,

Kubiak

et al. 2023

Energies

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In recent years, growing environmental awareness, the need to reduce greenhouse gas emissions, and the energy crisis have led many countries to seek alternative energy sources. One of the most promising solutions is biogas production via anaerobic digestion (AD), whose substrate can be organic-rich and easily biodegradable food waste (FW). This waste is a significant part of the global waste problem, and its use for energy production is beneficial to both the environment and the economy. This paper presents important issues concerning the monitoring of the AD process, as well as standard and innovative, for the implementation of this process, technological solutions. The aim of the measures taken to optimise the process is to increase AD efficiency and obtain the highest possible methane content in biogas. Two approaches—pretreatment and anaerobic co-digestion (AcoD)—have been integral to the implementation of AD of food waste for years. They are presented in this paper based on a review of recent research developments. Pretreatment methods are discussed with particular emphasis on mechanical, chemical and biological methods. The AcoD of FW with different organic substrates has been extensively reviewed, as confirmed by numerous studies, where higher buffer capacity and optimum nutrient balance enhance the biogas/methane yields. Attention was also paid to the parameters, operating mode and configurations of anaerobic digesters, with a thorough analysis of the advantages and disadvantages of each solution. The article concludes with a brief presentation of the development perspectives for the discussed FW management method and recommendations.

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“…This provides a high enough calori c value to nd use in several energy technology applications since the CH 4 content is signi cantly high at 60% for energy utilizations. In this study, it was noted that supplementation of FW improved the percentage of CH 4 content in biogas compositions, which contributed to robust methanogen activity and growth [54].…”

Section: Biogas Compositionsmentioning

confidence: 73%

Enhancing Biodegradability of Coffee Husk and Water Hyacinth using Food Waste: Synergistic and Kinetic Evaluation under Co-digestion

Ibro,

Ancha,

Lemma

et al. 2024

Preprint

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Coffee husk (CH) and water hyacinth (WH) are seen as environmental challenges causing eutrophication of water streams and infestation of water bodies. These biomass resources, available in plenty with high organic content can be considered for anaerobic digestion. However, their high lignin content poses a challenge to their biodegradability in which case co-digestion with easily degradable food waste (FW) could alleviate this problem. Thus, the synergistic effect with co-digestion of CH and WH employing increasing FW levels on biogas yield, biodegradability (BDfpc), and biodegradation rate (ηBD) were investigated in this work. Experimental studies were conducted with a varied mixtures of CH/WH/FW (100:0:0, 0:100:0, 35:35:30, 30:30:40, 25:25:50, 20:20:60 and 0:0:100) at constant temperature (38 ± 1°C). The results indicated that addition of FW significantly enhanced WH and CH digestion performance, with the maximum biogas yield of 572.60 ml/gVS, highest BDfpc of 89.22% and ηBD of 57.82% obtained at a mix ratio of 25:25:50, which was improved by 194.98% compared to CH mono-digestion. The co-digestion tests exhibited strong synergy due to their nutritional balance and other interactive effects promoting stability. Maximum synergy was 1.72 for a mix of 20:20:60. The modified Gompertz, logistic, and first-order kinetic models were used to simulate the experimental data to portray the biodegradation and kinetics involved. The modified logistic equation was seen to be the best fit to elucidate biogas production. The current findings highlighted the importance of increasing the easily biodegradable waste fractions in the co-digestion of lignocellulosic biomass for enhanced biodegradability.

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Enhancement of anaerobic digestion by co-digesting food waste and water hyacinth in improving treatment of organic waste and bio-methane recovery

Cited by 20 publications

References 47 publications

Sweet Sorghum as a Potential Fallow Crop in Sugarcane Farming for Biomethane Production in Queensland, Australia

Sweet Sorghum as a Potential Fallow Crop in Sugarcane Farming for Biomethane Production in Queensland, Australia

Anaerobic Digestion of Food Waste—A Short Review

Enhancing Biodegradability of Coffee Husk and Water Hyacinth using Food Waste: Synergistic and Kinetic Evaluation under Co-digestion

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