Effect of Alkali-NaOH Pretreatment on Methane Production from Anaerobic Digestion of Date Palm Waste

Lahboubi, Nabila; Karouach, Fadoua; Bakraoui, Mohammed; Gnaoui, Yasser El; Essamri, Azzouz; Bari, Hassan El

doi:10.12912/27197050/144846

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…It strongly influences the anaerobic digestion process. The process is optimal near neutral pH = 7 (Chen et al, 1978) with an optimal value between 6.5 and 8.5 (Lahboubi et al, 2022) The pH values of the substrate at the beginning and at the end of the process are presented in Table 3. They vary between 8.95 and 8.16 which tells us that the experiment was performed under optimal pH conditions for mesophilic anaerobic digestion.…”

Section: Parameters Influencing the Stability Of Anaerobic Digestionmentioning

confidence: 99%

Methane Production from Farmed Rainbow Trout Byproducts by Anaerobic Digestion in Morocco

Essalhi¹,

Bengueddour²

2023

Ecol. Eng. Environ. Technol.

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Fish are a staple in human nutrition because of their great nutritional and dietetic value. The processing stages of these fish before being sold generates an important quantity of byproducts (head, viscera, skeleton, fins, scales, tail, and skin). This study aims to determine the methane production, methanogenic potential and the percentage of volatile solids removed by the anaerobic digestion process. The experiment was carried out at mesophilic conditions in a Continuous Stirred-Tank Reactor (CSTR) with a discontinuous feeding mode (batch). The results obtained showed that the byproducts of farmed rainbow trout have a maximum methane production 1176 Nml whose methanogenic potential is 206.68 Nml/gVS with a biodegradability equal to 57.95%. For the kinetic modeling, four models were applied for an adequate fit of the experimental results (first order, MGompertz, transfererence function, and logistic function). The production of methane closest to the experimental results is that estimated by the logistic function with a methanogenic potential of 212.21 Nml/gVS whose correlation coefficient R 2 = 0.9870 and a very low percentage of error (1.18%), also the MGompertz model presented results adapted to those of the experiment with a methanogenic potential equal to 223.61 Nml/gVS (R 2 = 0.9889 and %error = 2.95); This confirms that these two kinetic models are the most suitable for this type of substrate.

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Section: Parameters Influencing the Stability Of Anaerobic Digestionmentioning

confidence: 99%

Methane Production from Farmed Rainbow Trout Byproducts by Anaerobic Digestion in Morocco

Essalhi¹,

Bengueddour²

2023

Ecol. Eng. Environ. Technol.

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“…The theoretical value was calculated using Buswell Equation. The equation to calculate biodegradability is written below (Lahboubi et al, 2022).…”

Section: Biodegradabilitymentioning

confidence: 99%

The Impact of Alkali Pretreatment and Organic Solvent Pretreatment on Biogas Production from Anaerobic Digestion of Food Waste

Shitophyta¹,

Padya²,

Zufar³

et al. 2022

J. Ecol. Eng.

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Anaerobic digestion of food waste is an encouraging technology for biogas production. Pretreatment of the substrate is needed to increase biodegradation. This study aimed to investigate the effect of alkali pretreatment and organic solvent pretreatment on biogas production. Physical pretreatment was also applied in this study. NaOH (0%, 2%, 4% and 6%) was used as alkali pretreatment. Ethanol (0, 2, 4 and 6%) was used as organic solvent pretreatment. The experiment was conducted in a 1 L batch digester under room temperature. Results showed that 0% NaOH generated the highest cumulative biogas yield of 46.1 mL/gVS. The best biodegradability of 37.5% was achieved in NaOH of 0%. The lower concentration of ethanol generated a higher biogas yield. The greatest cumulative yield of 41.5 mL/gVS was obtained at an ethanol concentration of 0% with a biodegradability of 33.84%. Statistical analysis proved that alkali pretreatment and organic solvent pretreatment had no significant effect on biogas production (p>0.05). Physical pretreatment had a significant effect (p<0.05) with the highest cumulative yield of 58.2 mL/gVS. The kinetic model proved that the modified Gompertz was a suitable model for predicting and simulating the kinetics of anaerobic digestion from food waste (R 2 > 0.9).

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“…), which cannot lead to benefits. Date palm is regarded as a renewable natural resource due to the fact that it could be substituted in a comparatively short time period. − After planting, it takes 4 to 8 years for date palm trees to bear fruit and 7 to 10 years to generate sustainable yields for commercial harvest. , Typically, date palm wastes can be burned in farms or can be disposed of in landfills, which results in environmental contamination in date-producing nations. ,, The main constituents of date palm biomass include lignin, hemicelluloses, and cellulose. , Furthermore, date palm has low moisture content and high volatile solids content. , These factors make date biomass an excellent waste-to-energy resource in the MENA region. Increasing customer needs, environmental deterioration, and energy crisis have forced researchers to search for green, inexpensive, and facile routes to produce innovative and advanced materials using renewable resources.…”

Section: Introductionmentioning

confidence: 99%

“… 12 , 13 Typically, date palm wastes can be burned in farms or can be disposed of in landfills, which results in environmental contamination in date-producing nations. 11 , 14 , 15 The main constituents of date palm biomass include lignin, hemicelluloses, and cellulose. 16 , 17 Furthermore, date palm has low moisture content and high volatile solids content.…”

Section: Introductionmentioning

confidence: 99%

“… 16 , 17 Furthermore, date palm has low moisture content and high volatile solids content. 15 , 18 These factors make date biomass an excellent waste-to-energy resource in the MENA region. Increasing customer needs, environmental deterioration, and energy crisis have forced researchers to search for green, inexpensive, and facile routes to produce innovative and advanced materials using renewable resources.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Preparation of Graphene Quantum Dots from Leaves of Date Palm Tree

2023

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The date palm (Phoenix dactylifera), a subtropical and tropical tree, included in the family Palmae (Arecaceae) is one of the oldest cultivated plants of mankind. Date palm is a major agricultural product in the semi-arid and arid areas of the world, particularly in Arab countries. These trees generate high quantities of agricultural waste in the form of dry leaves, seeds, etc. In this study, dried date palm leaves were used as green precursors for synthesizing graphene quantum dots (GQDs). This work reported the preparation of GQDs using two different sustainable methods. GQD-1 was developed using a simple, hydrothermal technique at 200 °C for 12 h in water, with no requirement of reducing or passivizing agents or organic solvents. GQD-2 was prepared using a hydrothermal technique at 200 °C for 12 h in water, with the usage of just distilled water and absolute ethanol. The compositional analysis of the leaf extract was performed, along with the morphological, compositional, and optical examination of the sustainably developed GQDs. The characterization results confirmed the successful formation of GQDs, with average sizes ranging from 3.5 to 8 nm. This study helps to obtain GQDs in an economical, eco-friendly, and biocompatible manner and can assist in large-scale production and in recycling date palm tree waste products from Middle East countries into value-added products.

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Effect of Alkali-NaOH Pretreatment on Methane Production from Anaerobic Digestion of Date Palm Waste

Cited by 16 publications

References 32 publications

Methane Production from Farmed Rainbow Trout Byproducts by Anaerobic Digestion in Morocco

Methane Production from Farmed Rainbow Trout Byproducts by Anaerobic Digestion in Morocco

The Impact of Alkali Pretreatment and Organic Solvent Pretreatment on Biogas Production from Anaerobic Digestion of Food Waste

Sustainable Preparation of Graphene Quantum Dots from Leaves of Date Palm Tree

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