Practical and Theoretical Modeling
of Anaerobic Digestion of &lt;i&gt;Sargassum&lt;/i&gt; spp.
in the Mexican Caribbean

López-Aguilar, Héctor Alfredo; Kennedy-Puentes, Guadalupe; Gómez, Jorge; Huerta-Reynoso, Enrique Alberto; Peralta-Pérez, María del Rosario; Serna, Francisco Javier Zavala-Díaz de la; Pérez-Hernández, Antonino

doi:10.15244/pjoes/128735

Cited by 9 publications

(6 citation statements)

References 27 publications

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“…The samples of Sargassum spp. collected in the Mexican Caribbean during the summer of 2019 determined that the theoretical potential of Sargassum resulted in 839.65 L CH 4 /kg VS [ 51 ]; this value above the present study may be due to the time and area in which it was collected [ 50 ]. Finally, when compared with the ligno-cellulosic biomass, it was observed that the Sargassum yield was above that obtained from wheat straw (232 L CH 4 /kg VS), corn stalk (206 L CH 4 /kg VS), sorghum (242 L CH 4 /kg VS), and barley straw (229 L CH 4 /kg SV) and are among the yields obtained from organic waste such as feed residues, sewage sludge, and animal waste (200 to 500 L CH 4 /kg VS) [ 45 , 52 , 53 ].…”

Section: Discussionmentioning

confidence: 51%

Improvement in Methane Production from Pelagic Sargassum Using Combined Pretreatments

Chikani-Cabrera¹,

Fernandes

Tapia-Tussell³

et al. 2022

Life

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The constant golden tides of Sargassum spp., identified to be a mixture of Sargassum natans and Sargassum fluitans, observed recently in the Mexican Caribbean have affected the marine ecosystem and the local economy and have created the need for solutions for their management and use. The Sargassum arrivals have thus been considered as third-generation feedstock for biofuel. Their potential for energetic conversion to biomethane was investigated, with hydrolysis as the limiting step due to its complex composition; therefore, in the present study, different physical, chemical, and enzymatic pretreatments and a combination of them have been evaluated, with the additional use of granular activated carbon, to determine the best yield and methane quality. The combined pretreatments of 2.5% hydrogen peroxide, followed by an enzymatic pretreatment (enzymatic extract from Trametes hirsuta isolated from decomposing wood in the Yucatán Peninsula-Mexico), was the best option, reaching a biodegradability of 95% and maximum methane yield of 387 ± 3.09 L CH4/kg volatile solid. The use of a conductive material, such as granular activated carbon, did not generate significant changes in performance and methane concentration.

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Section: Discussionmentioning

confidence: 51%

Improvement in Methane Production from Pelagic Sargassum Using Combined Pretreatments

Chikani-Cabrera¹,

Fernandes

Tapia-Tussell³

et al. 2022

Life

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“…If this ratio is high the nitrogen is rapidly consumed and biogas production decreases and if low, inhibitors such as ammonia and volatile fatty acids can accumulate [32]. The C/N ratio for Sargassum was determined to be within this range for biogas production (Table 1) and this was shown in previous studies [33]. For their part, the endemic macroalgae and the microalgae of the photobioreactor show less potential for biogas production.…”

Section: Ultimate Analysismentioning

confidence: 59%

Volatile Compounds of Algal Biomass Pyrolysis

López-Aguilar

Quiroz-Cardoza

Pérez-Hernández

2022

JMSE

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The use and transformation of biomass into highly valuable products is a key element in circular economy models. The purpose of this research was to characterise the volatile compounds and the temperature at which they are emitted during the thermal decomposition by pyrolysis of algal biomass while looking at three different types: (A1) endemic microalgae consortium, (A2) photobioreactor microalgae consortium and (A3) Caribbean macroalgae consortium. Furthermore, the ultimate (CHON) and proximate (humidity, volatile solids and ashes) compositions of the algal biomass were determined. Some volatile species were identified as having potential industrial interest for use as precursors and intermediaries, such as commercially used aromatic compounds which if not suitably managed can be harmful to our health and the environment. It is concluded that the pyrolysis of algal biomass shows potential for the generation of valuable products. The information generated is useful, especially the temperature at which volatility occurs, in order to access the valuable compounds offered by the algal biomasses, and under the concept of biorefinery convert the issue of biomass disposal into a sustainable source of raw materials.

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“…It does not require fresh biomass like other processes (e.g., biofertilizers production) [71]. Limitations for this use are the high concentrations of recalcitrant components in Sargassum, such as sulfates, sodium chloride and heavy metals, which can act as inhibitors of anaerobic digestion, a process necessary for bioenergy production [81]; additionally, the amount of lignin found in Sargassum cell walls acts as a barrier to the microorganisms needed in the biofuel conversion process [82]. Other isolated efforts to produce bioenergy from Sargassum used direct pyrolysis of waste biomass.…”

Section: Bioenergeticsmentioning

confidence: 99%

A Review of a Decade of Local Projects, Studies and Initiatives of Atypical Influxes of Pelagic Sargassum on Mexican Caribbean Coasts

et al. 2022

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This study collates and reviews the state of the art in the phenomenon of atypical pelagic Sargassum influxes in the coastline of the Mexican Caribbean, focusing on projects, studies and initiatives that have been conducted in the country for a decade. We integrated multisectoral and multidisciplinary knowledge and identified gaps and strengths in current knowledge. Initiatives and projects conducted in Mexico are numerous, diverse and valuable. However, interdisciplinary and transdisciplinary research and interinstitutional coordinated actions in the medium- and long-term are still lacking. Because of this, there is an imbalance of actions in different knowledge areas that prevents this phenomenon from being addressed in a comprehensive way. Furthermore, the funding opportunities for Sargassum research projects and other initiatives seem to respond to the events of massive influxes, without continuity or long-term planning. Attention is mainly focused on urban and touristic areas, so impacts to rural or uninhabited zones are unknown. This review represents a stepping-stone towards an integrated multisectoral effort to shift the perspective from Sargassum being a “national problem” to a “national resource,” considering and fully understanding the ecological importance of this macroalgae as a floating ecosystem and its potential as an economic resource once it massively arrives in Mexican coastal areas.

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Practical and Theoretical Modeling of Anaerobic Digestion of <i>Sargassum</i> spp. in the Mexican Caribbean

Cited by 9 publications

References 27 publications

Improvement in Methane Production from Pelagic Sargassum Using Combined Pretreatments

Improvement in Methane Production from Pelagic Sargassum Using Combined Pretreatments

Volatile Compounds of Algal Biomass Pyrolysis

A Review of a Decade of Local Projects, Studies and Initiatives of Atypical Influxes of Pelagic Sargassum on Mexican Caribbean Coasts

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