Improvement of methane production at alkaline and neutral pH from anaerobic co-digestion of microalgal biomass and cheese whey

Rincón-Pérez, Jack; Celis, Lourdes B.; Morales, Marcia; Alatriste‐Mondragón, Felipe; Tapia-Rodríguez, Aída; Razo-Flores, Elı́as

doi:10.1016/j.bej.2021.107972

Cited by 26 publications

(10 citation statements)

References 32 publications

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“…Chandra et al [33] reported that if the C/N ratio is very low, nitrogen will be liberated and accumulated in the form of ammonium ion, then the presence of excess NH 4 will increase the pH of the biodigestate in the digester, and thus a pH higher than 8.5 will start showing a toxic effect on methanogens population. However, Rincón-Pérez et al [34] demonstrated that anaerobic digestion at alkaline condition (pH = 9) produced biogas with higher methane content (83%) that at neutral pH (61%).…”

Section: Biogas Production From Anaerobic Digestion Of Raw Microalgae and Microalgae Residues With Sewage Sludgementioning

confidence: 99%

Biogas production from anaerobic digestion of solid microalgae residues generated on different processes of microalgae-to-biofuel production

Torres

Padrino

Brito

et al. 2021

Biomass Conv. Bioref.

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In this work, the anaerobic digestion of three microalgae (Chlorella sp., Nannochloropsis sp., and Scenedesmus sp.) and their residues, resulting from the oil extraction process and the in situ transesterification reaction for biodiesel production, using two inoculums (sewage sludge and poultry manure) for biogas production was investigated. It was found that the biogas production from digestion of oil-extracted microalgae residue with sewage sludge reached values similar to those obtained with raw microalgae (around 500 NL kg−1 VS). Both the volume of biogas generated from the microalgae residue from the extraction process of its oil and the quality of the biogas produced reflect the value of this residue to be valorized by anaerobic digestion. This approach based on a biorefinery concept and focusing on the anaerobic digestion process could be a key technology for energy production from biomass.

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Section: Biogas Production From Anaerobic Digestion Of Raw Microalgae and Microalgae Residues With Sewage Sludgementioning

confidence: 99%

Biogas production from anaerobic digestion of solid microalgae residues generated on different processes of microalgae-to-biofuel production

Torres

Padrino

Brito

et al. 2021

Biomass Conv. Bioref.

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“…The biomass of S. obtusiusculus AT‐UAM can serve as a viable substrate for anaerobic digestion to produce biogas; 51 production of up to 193 mL CH 4 g volatile solids added −1 from thermally hydrolysed microalga biomass was reported. Similarly, the methane content in the biogas was enhanced up to 83% v/v from the mono‐digestion of thermochemical microalgal hydrolysate biomass of S. obtusiusculus AT‐UAM and co‐digestion with cheese whey 52 . Furthermore, the potential to produce biohydrogen by S. obtusiusculus AT‐UAM has been explored through a thermochemical pre‐treatment 53 .…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, the methane content in the biogas was enhanced up to 83% v/v from the monodigestion of thermochemical microalgal hydrolysate biomass of S. obtusiusculus AT-UAM and co-digestion with cheese whey. 52 Furthermore, the potential to produce biohydrogen by S. obtusiusculus AT-UAM has been explored through a thermochemical pre-treatment. 53 Thus, S. obtusiusculus AT-UAM biomass can be used as feedstock to produce biofuels such as biodiesel, bioethanol and methane contained in the biogas or biohydrogen.…”

Section: Biotechnological Application and Techno-economic Feasibilitymentioning

confidence: 99%

Effect of nitrogen feast–famine cycles and semi‐continuous cultivation on the productivity of energy‐rich compounds by Scenedesmus obtusiusculus AT‐UAM

Gorry

Ángeles

Revah³

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Nitrogen (N) limitation is the most common strategy used to accumulate energy‐rich compounds in microalgae. However, this condition reduces the microalga growth rate and biomass, lipid and carbohydrate productivities. In this work, a semi‐continuous operation strategy combined with N feast–famine cycles were investigated in order to increase the lipid, carbohydrate and biomass contents in the microalga Scenedesmus obtusiusculus AT‐UAM. RESULTS Growth and lipid productivity were evaluated in a flat‐panel photobioreactor (FP‐PBR) under controlled conditions, through 72 and 24 h N feast–famine cycles at different N concentrations (6, 12 and 24 mg N L−1). The highest accumulation of microalgal biomass, lipid and carbohydrate (550 ± 28, 139 ± 4 and 198 ± 7 mg L−1 d−1) was obtained for 24 h cycles at 12 mg N L−1 and were up to ~2.4 times compared to that of 72 h N feast–famine cycles. This strategy was also applied in a bubble column photobioreactor (BC‐PBR) located in a greenhouse. Here, biomass productivities obtained under a semi‐continuous operation for 24 h N feast–famine cycles with 6 and 12 mg N L−1 were 536 ± 27 and 667 ± 33 mg L−1 d−1, respectively. The maximum productivity of lipid and carbohydrate reached 142 ± 10 and 169 ± 14 mg L−1 d−1 with 12 mg N L−1, respectively. CONCLUSION The studied N feast–famine cycles and semi‐continuous operations increased the productivity of biomass and lipids in S. obtusiusculus AT‐UAM. © 2021 Society of Chemical Industry (SCI).

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“…Usually, to enhancing the efficiency of the pretreatment, combined processes are used. In the case of thermochemical pretreatment, adding diluted HCl at temperatures over 80°C intensifies the solubilization of polymers of macro and microalgae [82,83]. For instance, hydrothermal heating with 4% H2SO4 of the algae blooms from Dianchi Lake resulted in a BMP of 261.93 mL CH4/g-VS.…”

Section: Sargassum Pretreatment For Biodegradation Improvementmentioning

confidence: 99%

Sargassum in Mexico: from environmental problem to valuable resource

López-Contreras

Valenzuela²,

García³

et al. 2022

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In recent years, large amounts of floating species of Sargassum seaweeds have arrived on the coasts and beaches of some Caribbean islands, the Gulf of Mexico, Northern Brazil, and West Africa. These beaching events appear to be recurring almost every year and cause major environmental, health, and economic problems in the affected areas. These Sargassum influxes threaten the already fragile coastal ecosystems, such as coral reefs, mangroves, and seagrass beds; they also disrupt the livelihoods of communities, especially those associated with the tourism and fishing sectors. This study aimed to develop strategies for valorization of the sargassum biomass that arrives to the coasts of the Gulf of Mexico. The present study is the result of the project "ValoSarg", financed by the Dutch program Kansen voor Morgen in 2021. This project was carried out as a collaboration between Mexican researchers at IPICYT, Wageningen University and Research and the company AllOptimal b.v. The project was coordinated by Wageningen University and Research under the supervision of the Agriculture advisor of the Dutch Embassy in Mexico.This report includes a compilation of data on sargassum origin, composition, policies, management, and uses from a variety of resources, with a focus on the Mexican situation. We have consulted scientific literature, (governmental) public reports, internet resources; and discussed with parties involved in sargassum research or use, in order to formulate strategies for building new value chains for valorization of sargassum biomass.Besides the fundamental research by Universities or Research Centers on many sargassum-related topics, such as biology, biorefinery or applications, in Mexico, several commercial activities relate to sargassum harvesting, valorization and innovations. Most of these activities are being developed by small companies Sargassum as feedstock for biogas production 3.1

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Improvement of methane production at alkaline and neutral pH from anaerobic co-digestion of microalgal biomass and cheese whey

Cited by 26 publications

References 32 publications

Biogas production from anaerobic digestion of solid microalgae residues generated on different processes of microalgae-to-biofuel production

Biogas production from anaerobic digestion of solid microalgae residues generated on different processes of microalgae-to-biofuel production

Effect of nitrogen feast–famine cycles and semi‐continuous cultivation on the productivity of energy‐rich compounds by Scenedesmus obtusiusculus AT‐UAM

Sargassum in Mexico: from environmental problem to valuable resource

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