Comparative life cycle assessment of conventional and novel microalgae production systems and environmental impact mitigation in urban-industrial symbiosis

Pechsiri, Joseph Santhi; Thomas, Jean‐Baptiste; Bahraoui, Naoufel El; Fernández, Francisco Gabriel Acién; Chaouki, Jamal; Chidami, Saad; Rivera-Tinoco, Rodrigo; Martin, Jose  Pena; Gómez-Serrano, Cintia; Combe, Michel; Gröndahl, Fredrik

doi:10.1016/j.scitotenv.2022.158445

Cited by 15 publications

(6 citation statements)

References 52 publications

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“…Scheme 1). The biocomposites were characterized by TGA and spectroscopy (FTIR and 13 C solids NMR), which reveal variable cross-linking between glutaraldehyde and the chitosan NH 2 groups, along with Cu(II) ion complex formation within the bead microstructure; this includes spectral shifts for key IR signatures, variation in thermal gravimetry profiles, and broadening of 13 C solids NMR resonance lines. SEM images provide support that the biocomposite has different modes of cross-linking that yield distinct bead morphologies.…”

Section: Discussionmentioning

confidence: 99%

“…The spectra of the chitosan beads in Figure 3 were assigned from a previous report [23]. The NMR spectra display relatively well-resolved 13 , where variable morphology of the biocomposites can be inferred due to variable inter-/intramolecular interactions of the resulting complexes [53]. Previous studies [21,29] for cross-linking of chitosan reveal enhanced pillaring of the biopolymer fibrils upon cross-linking.…”

Section: Solid State 13 C Nmr Spectroscopymentioning

confidence: 94%

“…13 C solids NMR spectra of the samples were collected using a Bruker AVANCE III HD spectrometer (Billerica, MA, USA) equipped with a 4 mm DOTY CP-MAS (cross polarization with magic angle spinning) solid probe operating at 125.77 MHz ( 1 H spectral frequency at 500.23 MHz). A spinning speed of 7.5 kHz, a 1 H 90 • pulse of 3.5 µs, and a contact time of 1 ms with a ramp pulse on the 1 H channel were used for the acquisition of the 13 C solids NMR spectra. A total of 6000-28,000 scans were accumulated with a recycle delay of 2 s, depending on the sample.…”

Section: Solid State 13 C Nmr Spectroscopymentioning

confidence: 99%

“…Various methods have been employed to mitigate eutrophication, such as the use of herbicides and algaecides, physical agitation of the water to homogenize nutrients, temperature and oxygen distribution, and diversion of excess nutrients by physical, chemical or biological methods [ 11 , 12 , 13 ]. Among the various methods available, [ 14 , 15 , 16 ] adsorption has distinct advantages over the other approaches since it is technically feasible, cost-effective, and environmentally friendly [ 9 , 13 , 14 , 17 , 18 ]. A key challenge for emerging adsorption technology relates to the development of effective and sustainable adsorbents [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Chitosan Biocomposites with Variable Cross-Linking and Copper-Doping for Enhanced Phosphate Removal

Udoetok,

Karoyo,

Mohamed

et al. 2024

Molecules

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The fabrication of chitosan (CH) biocomposite beads with variable copper (Cu2+) ion doping was achieved with a glutaraldehyde cross-linker (CL) through three distinct methods: (1) formation of CH beads was followed by imbibition of Cu(II) ions (CH-b-Cu) without CL; (2) cross-linking of the CH beads, followed by imbibition of Cu(II) ions (CH-b-CL-Cu); and (3) cross-linking of pristine CH, followed by bead formation with Cu(II) imbibing onto the beads (CH-CL-b-Cu). The biocomposites (CH-b-Cu, CH-b-CL-Cu, and CH-CL-b-Cu) were characterized via spectroscopy (FTIR, 13C solid NMR, XPS), SEM, TGA, equilibrium solvent swelling methods, and phosphate adsorption isotherms. The results reveal variable cross-linking and Cu(II) doping of the CH beads, in accordance with the step-wise design strategy. CH-CL-b-Cu exhibited the greatest pillaring of chitosan fibrils with greater cross-linking, along with low Cu(II) loading, reduced solvent swelling, and attenuated uptake of phosphate dianions. Equilibrium and kinetic uptake results at pH 8.5 and 295 K reveal that the non-CL Cu-imbibed beads (CH-b-Cu) display the highest affinity for phosphate (Qm = 133 ± 45 mg/g), in agreement with the highest loading of Cu(II) and enhanced water swelling. Regeneration studies demonstrated the sustainability and cost-effectiveness of Cu-imbibed chitosan beads for controlled phosphate removal, whilst maintaining over 80% regenerability across several adsorption–desorption cycles. This study offers a facile synthetic approach for controlled Cu2+ ion doping onto chitosan-based beads, enabling tailored phosphate oxyanion uptake from aqueous media by employing a sustainable polysaccharide biocomposite adsorbent for water remediation by mitigation of eutrophication.

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Section: Discussionmentioning

confidence: 99%

Section: Solid State 13 C Nmr Spectroscopymentioning

confidence: 94%

Section: Solid State 13 C Nmr Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chitosan Biocomposites with Variable Cross-Linking and Copper-Doping for Enhanced Phosphate Removal

Udoetok,

Karoyo,

Mohamed

et al. 2024

Molecules

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“…The main obstacles in scaling up biomass production in the conventional system are high processing costs and low efficiency [22,23]; therefore, the use of digital technology could improve productivity effectively and efficiently manage microalgal biomass production [24]. The monitoring and control of parameters such as pH, T, and nutrient status is crucial in microalgae culture because it not only increases the production and quality of microalgae biomass but also prevents critical conditions for the culture that may jeopardize cultivation [25].…”

Section: Introductionmentioning

confidence: 99%

Microalgae Production on Biogas Digestate in Sub-Alpine Region of Europe—Development of Simple Management Decision Support Tool

Resman,

Berden Zrimec,

Žitko

et al. 2023

Sustainability

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In a one-and-a-half-year study conducted in the ALS6 region in Europe (Ljubljana, Slovenia), the cultivation of microalgae in anaerobic digestate from food waste, mainly Scenedesmus dimorphus and Scenedesmus quadricauda, was investigated in three ponds (1260 L each) under a greenhouse. The effects of changing digestate quality and quantity as well as seasonal fluctuations on the productivity of the microalgae were investigated in three stages: Learning/Design (SI), Testing (SII), and Verification/Calibration (SIII). A decision support tool (DST) was developed using easy-to-measure parameters such as pH, temperature, electrical conductivity, mineral nitrogen forms and physical, biological parameters (OD, delayed fluorescence intensity). To control optimal pond operation, we proposed the photosynthetic culture index (PCI) as an early indicator for necessary interventions. Flocculation and nitrite levels (above 3 mg NO2-N L−1) were signals for the immediate remediation of the algae culture. Under optimal conditions in summer SIII, an average algal biomass production of 11 ± 1.5 g m−2 day−1 and a nitrogen use efficiency of 28 ± 2.6 g biomass/g N-input were achieved with the developed DST. The developed DST tool was, in this study, successfully implemented and used for the cultivation of microalgae consortia predominated by Scenedesmus dimorphus and S. quadricauda with biogas digestate. DST offers the possibility to be modified according to producers’ specific needs, facility, digestate and climate conditions, and as such, could be used for different microalgae cultivation processes with biogas digestate as a food source.

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Sustainability of microalgae-based industrial processes

Pechsiri

2024

Sustainable Industrial Processes Based on Microalgae

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Comparative life cycle assessment of conventional and novel microalgae production systems and environmental impact mitigation in urban-industrial symbiosis

Cited by 15 publications

References 52 publications

Chitosan Biocomposites with Variable Cross-Linking and Copper-Doping for Enhanced Phosphate Removal

Chitosan Biocomposites with Variable Cross-Linking and Copper-Doping for Enhanced Phosphate Removal

Microalgae Production on Biogas Digestate in Sub-Alpine Region of Europe—Development of Simple Management Decision Support Tool

Sustainability of microalgae-based industrial processes

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