Enhanced Methane Production from Dry Leaflets of Algerian Date Palm (Phoenix dactylifera L.) Hmira Cultivar, by Alkaline Pretreatment

Djaafri, Mohammed; Kalloum, Slimane; Kaidi, Kamel; Salem, Fethya; Balla, Soumia; Meslem, Djelloul; Iddou, Abdelkader

doi:10.1007/s12649-018-00574-w

Cited by 15 publications

(7 citation statements)

References 42 publications

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“…To examine the stability of AD process, VFA/TA ratio is also an important factor and it should be less than 0.5. But if the ratio exceeds the limit of 0.5, it is considered the indication of instability of the digester [51,52]. The results of pH, TA, total VFAs, NH 3 -N, and VFA/TA ratio caused by various pretreatments of co-digestion during BMP test are indicated in Table 4.…”

Section: Process Stabilitymentioning

confidence: 99%

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Noonari

Shah

Mirjat

et al. 2022

Biomass Conv. Bioref.

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Canola straw (CS) is the lignocellulosic biomass and is often managed by burning in Pakistan. Pretreatment is a well-established technique for partially disintegrating the crop residue to use in anaerobic digestion. The present study efforts were made to evaluate the effect of optimal pretreatment through comparison. CS was subjected to various pretreatments using H 2 O 2 , Ca(OH) 2 (concentrations), SiO 2 (nanoparticles), and P. ostreatus (incubation times) that were used as acidic, alkaline, catalyst, and biological pretreatments to enhance methane yield by anaerobic co-digestion. On the basis of 5 g volatile solids (VS), CS was mixed with buffalo dung (BD) at a ratio of 40:60. The batch was carried out in Semi-Automatic Methane Potential Test System (SAMPTS) under mesophilic conditions. Experimental findings observed that all pretreatments effectively improve methane production. Maximum methane yields of 417.3, 386.1, 381.0, and 238.6 mlCH 4 /gVS were obtained at 0.4% Ca(OH) 2 , 0.2% H 2 O 2 , 0.5 mg SiO 2 , and 30th day P. ostreatus respectively. However, the highest biodegradability (about 27.1%) was observed in the pretreatment of H 2 O 2 . In addition, optimal results were statistically analyzed (P < 0.05) and S-Gompertz model (SGM) was applied to the highest methane yields. Kinetics parameters indicated that the applied model was best fitted. Based on economic valuation and favorable for methanogens, Ca(OH) 2 pretreatment is recommended.

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Section: Process Stabilitymentioning

confidence: 99%

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Noonari

Shah

Mirjat

et al. 2022

Biomass Conv. Bioref.

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“…Figure 7 shows the evolution of pH in the digestion media. We noticed the increase of acidity of the medium in the three digesters during the first ten days, which is explained by the degradation by the degradation of substrate and the formation and accumulations of fatty acids (Djaafri et al, 2020).…”

Section: Anaerobic Digestion Of Date Pastementioning

confidence: 78%

“…The degradability of the substrate was deduced from measuring and comparing the pH and chemical oxygen demand (COD) analysis results at the start and the end of each experiment. (Djaafri et al, 2020).…”

Section: Pretreatmentmentioning

confidence: 99%

Valorization of Date Waste (Hmira Cultivar) for the Production of Bioalcohol and Biogas

Arroussi,

Tahri,

Nehar

et al. 2023

CTNS

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During the past years, bioethanol and biogas have a significantly development, they are fuels obtained from the fermentation of sugar plants and anaerobic digestion of organic compounds respectively, The major advantage of these biofuels is the reduction of gases Global Warming effect. In this work, two steps were performed: the first was the production of bioethanol from date waste by the fermentation. In the second stage, anaerobic digestion experiments are contucted in four digesters, each with a one litre capacity and a working volume of 600 mL. The digstion pricess takes place at 37°C for a duration of 45 days. To prepare the digesters, 10 g of volatile solids (VS) from the substrate are used. Alkaline pretreatment is employed with NaOH concentrations of 6%, 12%, and 18% (weight/weight, w/w) based on the substrate’s volatile solids (VS). We obtained a yield of 360 mL of bioethanol of 93 ° per 1 kg of date waste. For the anaerobic digestion, the obtained results show that a 12% NaOH is the best concentration with a 1178 mL CH4/gVS.

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“…But these are found to be a good source of bioactive compounds like anthocyanins, phenolics, alkaloids, glycosides, and volatile oils [23,24]. These can be even used for the production of volatile fatty acids [25,26], biogas [27][28][29], and bioenergy (bioethanol, butanol & electricity) [30][31][32][33][34].…”

Section: Fruit and Food Waste As Feedmentioning

confidence: 99%

Bioconversion of Agricultural and Food Wastes to Vinegar

Saha¹,

Das²

2023

Updates on Fermentation [Working Title]

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Agricultural residues and fruit/food wastes are a curse to the environment but this can also play an important role in meeting the growing needs for energy, value-added chemicals, and food security problems. Vinegar is an acidic liquid whose major component is acetic acid and consists of different organic acids and bioactive compounds. Vinegar is a substance produced by the acetic acid bacteria Acetobacter and Gluconobacter that has a 4% acetic acid content. For the efficient biological production of acetic acid, a variety of renewable substrates are used, including agro and food, dairy, and kitchen wastes. This reduces waste and lowers environmental pollution. There are different types of traditional vinegar available all over the world and have many applications. Vinegar can be made either naturally, through alcoholic and then acetic fermentation, or artificially, in laboratories. This chapter emphasizes the production and biotransformation of agricultural and fruit wastes into vinegar and the genetic manipulations done on microorganisms to utilize a wide range of substrates and achieve maximum product titer.

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Enhanced Methane Production from Dry Leaflets of Algerian Date Palm (Phoenix dactylifera L.) Hmira Cultivar, by Alkaline Pretreatment

Cited by 15 publications

References 42 publications

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Valorization of Date Waste (Hmira Cultivar) for the Production of Bioalcohol and Biogas

Bioconversion of Agricultural and Food Wastes to Vinegar

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