Silvia Greses, Julie Jimenez, Cristina González-Fernández and Jean-Philippe Steyer
Publication Repository: Bioresource Technology (Science Direct)
Publication year: 2024
Anaerobic digestion (AD) of microalgae is an intriguing approach for bioenergy production. The scaling-up of AD presents a significant challenge due to the systematic efficiency losses related to process instabilities. To gain a comprehensive understanding of AD behavior, this study assessed a modified version of the anaerobic digestion model No1 (ADM1) +Contois kinetics to represent microalgae AD impacted by overloading. […]
Cristian Inostroza, Javier Dávila, Sergio Román, José M. Fernández‑Sevilla and F. Gabriel Acién.
Publication Repository: Journal of Applied Phycology
Publication year: 2023
The lack of adequate vertical mixing is one of the factors limiting the productivity of open raceway microalgae reactors. The existence of large gradients of light involves the cells being mainly adapted to local irradiance instead of average irradiance, which would allow for maximizing the light utilization efficiency, thus maximizing the biomass productivity of microalgae cultures. […]
Greses, S., Walter, JM., Pope, PB., Hagen, LH., Arntzen, MØ. and González-Fernández, C.
Conference Paper: 15th Mediterranean Congress of Chemical Engineering
Publication year: 2023
AThe increasing energy demand is drawing attention to the development of renewable sources. In this context of technologies devoted to energy production, anaerobic digestion (AD) is one of the most studied technologies for organic waste valorization into biogas (CH4 + CO2). Currently, microalgae represent a promising feedstock to produce energy. Microalgae are able to recover the nutrients present in wastewater while producing biomass that can be used as feedstock for AD. […]
CF. G. Acien, C. Gómez, A. Morillas, A. Zouhayr, A. Sanchez, R. Nordio, E. Rodriguez, J. L. Guzman and J. M. Fernández-Sevilla.
Publication Repository: IWA Publishing
Publication year: 2023
This chapter summarizes the status, major challenges and potential contribution of microalgae-related wastewater treatment processes. Although the use of microalgae for wastewater treatment was proposed in the last century, technology was not sufficiently efficient and robust to be applied at a commercial scale. Only recent advances in the knowledge of biological systems, the engineering of reactors and the harvesting and processing of the produced biomass allow the development of the first industrial demonstrations. […]
Rebecca Nordio, Enrique Rodríguez-Miranda, Francesca Casagli, Ana Sánchez-Zurano, José Luis Guzmán and Gabriel Acién.
Publication Repository: ELSEVIER
Publication year: 2023
Modelling microalgae-bacteria in wastewater treatment systems has gained significant attention in the last few years. In this study, we present an enhanced version of the ABACO model, named ABACO-2, which demonstrates improved accuracy through validation in outdoor pilot-scale systems. ABACO-2 enables the comprehensive characterization of microalgae-bacteria consortia dynamics, allowing to predict the biomass concentration (microalgae, heterotrophic bacteria, and nitrifying bacteria) and nutrient evolution. […]
Rebecca Nordio, Emanuele Viviano, Ana Sánchez-Zurano, José González Hernández, Enrique Rodríguez-Miranda, José Luis Guzmán and Gabriel Acién.
Publication Repository: Journal of Environmental Management
Publication year: 2023
Dissolved oxygen concentration and pH are controllable and cost-effective variables that determine the success of microalgae-related processes. The present study compares different control strategies for pH and dissolved oxygen in pilot-scale microalgae production systems. Two 80 m2 raceway reactors were used, one operated with freshwater plus fertilizer and the other with wastewater as the nutrient source. […]
Cermeño, Pedro; García-Comas, Carmen; Giner, Caterina R.; Logares, Ramiro; Marrasé, Cèlia; Massana, Ramon; Pedrós-Alió, Carlos; Sala, M. Montserrat; Simó, Rafel; Tamames, Javier and Vallina, Sergio M..
Publication Repository: Digital CSIC
Publication year: 2022
Marine phytoplankton, including cyanobacteria and microalgae, dominates primary production across two thirds of the earth’s surface, sustaining virtually all marine life and exerting a fundamental control over global climate through carbon sequestration into the deep ocean. These unicellular photoautotrophs are responsible for roughly 50% of global net primary production, which is equivalent to producing 50 gigatons of organic carbon (C) per year (about 140 million t per day). […]
Solaima Belachqer-El Attar, Ainoa Morillas-España, José Luis Casas López, María Guadalupe Pinna-Hernández and Gabriel Acién.
Publication Repository: Science Direct
Publication year: 2022
The optimization of downstream processing is a critical step in any microalgae-related process. The microalgal biomass is separated from the initial diluted cultures to form a concentrated slurry, the properties of which greatly influence the design and performance of further processing steps, such as enzymatic hydrolysis. In this work, the rheological behaviour of two microalgal concentrates produced both in freshwater (Scenedesmus almeriensis) and seawater (Nannochloropsis gaditana) were studied. […]
Elisa Clagnan, Giuliana D’Imporzano, Marta Dell’Orto, Ana Sanchez-Zurano, Francisco Gabriel Acién-Fernandez, Biancamaria Pietrangeli and Fabrizio Adani.
Publication Repository: Science Direct
Publication year: 2022
Microalgae cultivation is proposed as an effective system for pathogens reduction and wastewater depuration, however, a full characterisation of the risks is still needed. Two raceways were inoculated with Scenedesmus, one using wastewater and the other using a fertilizer medium. Microbial community and pathogen presence were explored by next generation sequencing (NGS), commercial qPCR array and plate counts. These methods proved to be complementary for a full characterization of community structure and potential risks. […]
A. Sánchez-Zurano, S. Rossi, J.M. Fernández-Sevilla, G. Acién-Fernández, E. Molina-Grima and E. Ficara.
Publication Repository: Science Direct
Publication year: 2022
Algae-bacteria (AB) consortia can be exploited for effective wastewater treatment, based on photosynthetic oxygenation to reduce energy requirements for aeration. While algal kinetics have been extensively evaluated, bacterial kinetics in AB systems are still based on parameters taken from the activated sludge models, lacking an experimental validation for AB consortia. A respirometric procedure was therefore proposed, to estimate bacterial kinetics in both activated sludge and AB, under different conditions of temperature, pH, dissolved oxygen, and substrate availability. […]
Rebecca Nordio, Francisco Javier Delgado, Ana Sánchez-Zurano, Jose Gonzalez Hernandez, Enrique Rodríguez-Miranda, José Luis Guzmán, Tomás Lafarga and Gabriel Acién.
Publication Repository: Science Direct
Publication year: 2022
The present work aims to assess the treatment of unprocessed urban wastewater using the microalga Scenedesmus almeriensis. Two 12 m3 raceway reactors, one supplemented by wastewater and the second by chemical fertilizer, operating outdoors in a semi-continuous mode, were used for eight months. Results suggested that S. almeriensis can be produced in wastewater without affecting the photosynthetic apparatus reaching a productivity of 13 g·m−2·day−1 on average in both the systems. […]
Kira Schipper, Hareb Mohammed S.J.Al Jabri, René H. Wijffels and Maria J. Barbosa.
Publication Repository: Science Direct
Publication year: 2022
Algae are a promising feedstock for the sustainable production of feed, fuels, and chemicals. Especially in arid regions such as the Arabian Peninsula, algae could play a significant role in enhancing food security, economic diversification, and decarbonization. Within this context, the regional potential of algae commercialization is discussed, exploring opportunities and challenges across technical, societal, and political aspects. […]
Pedro Cermeño, Carmen García-Comas, Alexandre Pohl, Simon Williams, Michael J. Benton, Chhaya Chaudhary, Guillaume Le Gland, R. Dietmar Müller, Andy Ridgwell and Sergio M. Vallina.
Publication Repository: Nature
Publication year: 2022
The fossil record of marine invertebrates has long fuelled the debate as to whether or not there are limits to global diversity in the sea. Ecological theory states that, as diversity grows and ecological niches are filled, the strengthening of biological interactions imposes limits on diversity. However, the extent to which biological interactions have constrained the growth of diversity over evolutionary time remains an open question. […]
Masayuki Ushio, Chih-hao Hsieh, Reiji Masuda, Ethan R Deyle, Hao Ye, Chun-Wei Chang, George Sugihara and Michio Kondoh.
Publication Repository: Nature
Publication year: 2018 (Correction 2022)
Ecological theory suggests that large-scale patterns such as community stability can be influenced by changes in interspecific interactions that arise from the behavioural and/or physiological responses of individual species varying over time. Although this theory has experimental support, evidence from natural ecosystems is lacking owing to the challenges of tracking rapid changes in interspecific interactions (known to occur on timescales much shorter than a generation time) and then identifying the effect of such changes on large-scale community dynamics. […]
Kathleen D’Hondt, Tanja Kostic, Richard McDowell, Francois Eudes, Brajesh K. Singh, Sara Sarkar, Marios Markakis, Bettina Schelkle, Emmanuelle Maguin and Angela Sessitsch.
Publication Repository: Nature
Publication year: 2021
The United Nations Sustainable Development Goals (SDGs) are being integrated into bioeconomy strategies around the world, including the European Green Deal. We highlight how microbiome-based innovations can contribute to policies that interface with the SDGs and argue that international cooperation in microbiome science is crucial for success. In 2015, the United Nations General Assembly adopted 17 Sustainable Development Goals (SDGs) that aim to improve the lives of people around the world. […]
Chun-Wei Chang, Takeshi Miki, Masayuki Ushio, Po-Ju Ke, Hsiao-Pei Lu, Fuh-Kwo Shiah and Chih-hao Hsiehi.
Publication Repository: Wiley
Publication year: 2021
Reconstructing interactions from observational data is a critical need for investigating natural biological networks, wherein network dimensionality is usually high. However, these pose a challenge to existing methods that can quantify only small interaction networks. Here, we proposed a novel approach to reconstruct high-dimensional interaction Jacobian networks using empirical time series without specific model assumptions. […]
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