Performance evaluation and substrate removal kinetics in the semi-continuous anaerobic digestion of thermally pretreated two-phase olive pomace or “Alperujo”

Lama, David de la; Borja, R.; Rincón, B.

doi:10.1016/j.psep.2016.11.014

Cited by 36 publications

(10 citation statements)

References 28 publications

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“…The application of different types of pre-treatment on wet pomace would be another possibility to improve methane production. Thus, methane production was enhanced by subjecting olive pomace to hydrothermal pre-treatment at 180 • C for 3 h [142]. The pre-treatment provoked a partial breakage of the polymers of the material, which improved its biodegradability.…”

Section: Anaerobic Digestionmentioning

confidence: 99%

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

et al. 2020

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Olive oil industry is one of the most important industries in the world. Currently, the land devoted to olive-tree cultivation around the world is ca. 11 × 106 ha, which produces more than 20 × 106 t olives per year. Most of these olives are destined to the production of olive oils. The main by-products of the olive oil industry are olive-pruning debris, olive stones and different pomaces. In cultures with traditional and intensive typologies, one single ha of olive grove annually generates more than 5 t of these by-products. The disposal of these by-products in the field can led to environmental problems. Notwithstanding, these by-products (biomasses) have a huge potential as source of energy. The objective of this paper is to comprehensively review the latest advances focused on energy production from olive-pruning debris, olive stones and pomaces, including processes such as combustion, gasification and pyrolysis, and the production of biofuels such as bioethanol and biodiesel. Future research efforts required for biofuel production are also discussed. The future of the olive oil industry must move towards a greater interrelation between olive oil production, conservation of the environment and energy generation.

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Section: Anaerobic Digestionmentioning

confidence: 99%

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

et al. 2020

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“…AD of organic waste has been applied extensively for decades to produce biogas and several studies of AD on the OMSW have been reported (de la Lama et al 2017;Gunay and Karadag 2015). However, using OMSW as the sole substrate is not recommended due to its nutritional imbalance (Fernández Rodríguez et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Anaerobic co-digestion of olive mill solid waste and microalga Scenedesmus quadricauda: effect of different carbon to nitrogen ratios on process performance and kinetics

et al. 2019

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Anaerobic digestion (AD) is one of the most efficient processes for treating agri-food waste in order to obtain renewable energy. Olive mill solid waste (OMSW) is the main residue from the two-phase olive oil manufacturing process; it has a high organic content and high C/N ratio, which hinders its AD, giving low methane yield. In the present study, a microalga, Scenedesmus quadricauda (S. quadricauda), was used as co-substrate for the AD of OMSW to compensate for its nitrogen deficiency. The robustness and the high growth rate of S. quadricauda make this microalga a potential source of nitrogen to co-digest with carbonrich substrates. Different co-digestion mixtures of OMSW-microalgae and the single substrate were tested. For all co-digestion mixtures, the alkalinity value at the end of the experiment remained below 4889±245 mg CaCO 3 /L and pH in the range of 7.50-7.67 indicating stability and good process performance. The results showed the highest methane yield (461 mL CH 4 2 STP/g VS added) for the co-digestion mixture 75% OMSW-25% S. quadricauda (C/N=25.3), which was 104 and 23% higher than that obtained from the single microalga (C/N=5.6) and OMSW (C/N=31.9), respectively. No ammonia inhibition was detected despite the high protein content of the microalgae. The transference function model allowed for adequately fitting the experimental results of methane production with time in the anaerobic experiments.The highest maximum methane production rate, R m , among the different co-digestion mixtures assayed was obtained for the mixture 75% OMSW-25% S. quadricauda with a value of 89 mL CH 4 /(g VS d).

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“…On these studies, higher OLRs usually implied the inhibition of the process by the accumulation of volatile fatty acids and phenolic compounds. 35,42,44 Other authors reported operations at much higher OLRs than 1 g VS/(L reactor •d) without compromising reactor performance, although in most of the cases the experimentation time was less than 2 hydraulic retention times per condition, [36][37][38]41 which may not be enough for triggering the inhibition of the anaerobic digestion process.…”

Section: Review Of the Anaerobic Digestion Of Omswmentioning

confidence: 99%

“…2 report a positive increment of the methane production, when the pre-treatment is used and due to the high energy demand of the pre-treatment, the net energy produced is diminished (blue color surface) respect single AD. According to the results, low temperature thermal pre-treatments 27,30,41 and alkaline 24,27 pre-treatments resulted in the largest improvements in the net energy production. The effects of low-intensive pre-treatments are related to the deflocculating of macromolecules, rather than the degradation of fibrous structures.…”

Section: Review Of the Anaerobic Digestion Of Omswmentioning

confidence: 99%

Is anaerobic digestion a feasible alternative to the combustion of olive mill solid waste in terms of energy production? A critical review

Serrano

Gómez²,

Fermoso

et al. 2020

Biofuels Bioprod Bioref

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The use of olive mill solid waste (OMSW) for energy production has been promoted mainly through combustion processes. However, the European Union promotes the substitution of combustion in favour of greener alternatives. Several publications have stated that the energy obtained from anaerobic digestion (AD) is a feasible waste-toenergy technology for OMSW. However, the question of which energetic method, AD or combustion, is better for the energetic valorisation of OMSW has lacked of a reliable energy balance that can answer it. The present research work aims to answer this question by evaluating the energetic potential of the biomethanization of OMSW, in comparison with the current combustion technology, based on the review of the available scientific literature. The present analysis demonstrates that AD of OMSW can generate a net energy production in the same range than the obtained by the OMSW combustion, enabling the AD as a greener alternative to combustion but not clearly offering a surplus of energy production.

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Performance evaluation and substrate removal kinetics in the semi-continuous anaerobic digestion of thermally pretreated two-phase olive pomace or “Alperujo”

Cited by 36 publications

References 28 publications

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces

Anaerobic co-digestion of olive mill solid waste and microalga Scenedesmus quadricauda: effect of different carbon to nitrogen ratios on process performance and kinetics

Is anaerobic digestion a feasible alternative to the combustion of olive mill solid waste in terms of energy production? A critical review

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