Assessment of the performance of an anoxic-aerobic microalgal-bacterial system treating digestate

Torres-Franco, Andrés F.; Zuluaga, Maribel; Hernández-Roldán, Diana; Freitas, Deborah Leroy; Sepúlveda-Muñoz, Cristian A.; Blanco, Saúl; Mota, César R.; Muñoz, Raúl

doi:10.1016/j.chemosphere.2020.129437

Cited by 14 publications

(6 citation statements)

References 50 publications

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“…0.224 g K2HPO4, 0.0175 g NaCl, 0.01 Ca2Cl and 0.005 g MgSO4 (per litre of distilled water) [34]. All reagents were purchased from PANREAC (Panreac, Química SAU, Barcelona, Spain).…”

Section: Methodsmentioning

confidence: 99%

“…The synthetic digestate (SD) composition mimicked a real digestate and consisted of 5.0 g NaHCO 3 , 0.85 g C 8 H 5 KO 4 , 0.73 g peptone from casein, 1.70 g NH 4 Cl, 0.90 g CO(NH 2 ) 2 , 0.224 g K 2 HPO 4 , 0.0175 g NaCl, 0.01 Ca 2 Cl and 0.005 g MgSO 4 (per litre of distilled water) [34]. All reagents were purchased from PANREAC (Panreac, Química SAU, Barcelona, Spain).…”

Section: Real and Synthetic Digestate Characterizationmentioning

confidence: 99%

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A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

et al. 2021

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Ammonia recovery from synthetic and real anaerobic digestates was accomplished using hydrophobic flat sheet membranes operated with H2SO4 solutions to convert ammonia into ammonium sulphate. The influence of the membrane material, flow rate (0.007, 0.015, 0.030 and 0.045 m3 h−1) and pH (7.6, 8.9, 10 and 11) of the digestate on ammonia recovery was investigated. The process was carried out with a flat sheet configuration at a temperature of 35 °C and with a 1 M, or 0.005 M, H2SO4 solution on the other side of the membrane. Polytetrafluoroethylene membranes with a nominal pore radius of 0.22 µm provided ammonia recoveries from synthetic and real digestates of 84.6% ± 1.0% and 71.6% ± 0.3%, respectively, for a membrane area of 8.6 × 10−4 m2 and a reservoir volume of 0.5 L, in 3.5 h with a 1 M H2SO4 solution and a recirculation flow on the feed side of the membrane of 0.030 m3 h−1. NH3 recovery followed first order kinetics and was faster at higher pHs of the H2SO4 solution and recirculation flow rate on the membrane feed side. Fouling resulted in changes in membrane surface morphology and pore size, which were confirmed by Atomic Force Microscopy and Air Displacement Porometry.

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“…0.224 g K2HPO4, 0.0175 g NaCl, 0.01 Ca2Cl and 0.005 g MgSO4 (per litre of distilled water) [34]. All reagents were purchased from PANREAC (Panreac, Química SAU, Barcelona, Spain).…”

Section: Methodsmentioning

confidence: 99%

Section: Real and Synthetic Digestate Characterizationmentioning

confidence: 99%

A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

et al. 2021

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“…In a certain range, the longer the illumination time, the better the growth of microalgae. The stronger photosynthesis, the consumption of a large amount of CO 2 destroys the circulation of inorganic carbon in water environment and increases the pH value [13]. In the later stage of the experiment, due to the limited photosynthesis of microalgae, the pH growth rate decreased and gradually stabilized [14].…”

Section: Resultsmentioning

confidence: 99%

Effects of Different Conditions on the Growth of <i>Microcystis aeruginosa</i>

Wang¹,

Peng²,

Gui³

et al. 2022

Pol. J. Environ. Stud.

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Microcystis aeruginosa is a common microalgae in nature. It is also the dominant algae species to form freshwater blooms. Water bloom will do harm to water environment, so this paper studies the growth law of Microcystis aeruginosa. Single factor experiment and orthogonal experiment were carried out by changing the influencing factors such as photoperiod, initial dosage and initial pH. The results showed that within a certain range, the larger the photoperiod, the larger the initial dosage, the higher the initial pH, the better the growth of Microcystis aeruginosa and the greater the increase of pH value. This study is to deepen the understanding of the growth law of Microcystis aeruginosa. It provides a scientific basis for controlling the growth of Microcystis aeruginosa.

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“…In this context, an efficient treatment of domestic wastewater with TOC removals of 88% and TN of 82% was recorded in anoxic-aerobic photobioreactors [74], while the treatment of textile wastewater using this innovative configuration achieved TOC removals of 48%, TN removals of 87% and TP removals 57%, along with an efficient decolourization of this wastewater [75]. An efficient treatment of synthetic food waste digestate, with removal efficiencies up to 96% and 84% for TOC and TN, respectively, was recently reported [76]. In addition, multiple studies of agro-industrial wastewater treatment reporting an efficient carbon and nitrogen removal have been reported for PWW [15,19,34,35,37].…”

Section: Microalgae-based Treatmentmentioning

confidence: 87%

“…In addition, the biomass of photosynthetic microorganisms can be used as a feedstock for the production of biofuels like biodiesel and bioethanol [90], while some species of PPB and cyanobacteria are capable of producing biohydrogen. PPB and microalgae biomass can be also used as a biofertilizer for plants as an N2-fixing rhizosphere and are known to accumulate compounds that are beneficial for plant growth [76,86] (Figure 8). Pigments: Photosynthetic microorganisms inherently present high concentrations and a broad portfolio of natural pigments since they are essential molecules for obtaining energy from solar radiation [68].…”

Section: Biomass Valorizationmentioning

confidence: 99%

Piggery Wastewater Treatment Using Photosynthetic Microorganisms

Sepúlveda-Muñoz¹,

Godos²,

Muñoz³

2023

Preprint

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Piggery wastewater (PWW) is characterized by its high concentrations of organic matter and ammonium, and by their odour nuisance. Traditionally, PWW has been treated in open anaerobic lagoons, anaerobic digesters and activated sludge systems, which exhibit high greenhouse gas emissions, a limited nutrients removal and a high energy consumption, respectively. Photosyn-thetic microorganisms can support a sustainable PWW treatment in engineered photobioreactors at low operating costs and with an efficient recovery of carbon, nitrogen and phosphorous. These microorganisms are capable of absorbing solar irradiation through the photosynthesis process to obtain energy, which is used for their growth and associated carbon and nutrients assimilation. Purple phototrophic bacteria (PPB) represent the photosynthetic microorganisms with the most versatile metabolism in nature, while microalgae are the most studied photosynthetic microor-ganisms in recent years. This review describes the fundamentals, symmetry and asymmetry of PWW treatment using photosynthetic microorganisms such as PPB and microalgae. The main photobioreactor configurations along with the potential of PPB and microalgae biomass valori-zation strategies are also discussed.

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Assessment of the performance of an anoxic-aerobic microalgal-bacterial system treating digestate

Cited by 14 publications

References 50 publications

A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

A Systematic Study of Ammonia Recovery from Anaerobic Digestate Using Membrane-Based Separation

Effects of Different Conditions on the Growth of <i>Microcystis aeruginosa</i>

Piggery Wastewater Treatment Using Photosynthetic Microorganisms

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