Global sensitivity and uncertainty analysis of a microalgae model for wastewater treatment

Aparicio, S.; Serna-García, R.; Seco, A.; Ferrer, J.; Borrás-Falomir, Luis; Robles, Ángel

doi:10.1016/j.scitotenv.2021.150504

Cited by 11 publications

(2 citation statements)

References 55 publications

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“…The next most sensitive parameters were maximum algae growth rate (PMc), basal metabolic rate (BMRc), and chlorophyll extinction coefficient (KeChl). The parameters related to biomass were crucial in the simulation, which was also reflected in the previous work (Aparicio et al., 2022; Jiang et al., 2018b). During the simulation, the temperature was more suitable, so light became an important factor limiting the Microcystis biomass.…”

Section: Resultssupporting

confidence: 71%

Modeling Physical and Physiological Processes Reveals the Role of Turbulence in the Prerequisites for Microcystis Blooms

Li,

Gao,

Sun

2024

Water Resources Research

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Harmful algal blooms of Microcystis have become a global problem. Turbulence, a determining factor affecting blooms, not only disperses surface scum but also controls the growth of Microcystis. Numerous studies have analyzed the effects of turbulence on the growth and colony size of Microcystis in laboratories, but the turbulence thresholds for Microcystis growth and colony disaggregation in the field are difficult to determine due to the complex environment. In addition, the quantitative contribution of turbulence‐driven blooms and the intrinsic mechanisms of the spatial distribution responding to turbulence are unclear. In this study, a fully integrated filed scale computational model focusing on turbulence‐driven blooms was developed, which incorporates physical processes (turbulence‐induced vertical mixing, VMT) and physiological processes such as buoyancy‐controlling transport (BCT), turbulence‐induced colony size variation (CSV), and growth rate variation (GRV). We performed model sensitivity analysis and evaluated the effects of turbulence intensity and duration on the biomass and vertical distribution of Microcystis. The results show that the optimal turbulence dissipation rate for Microcystis growth in the field is 1.0 × 10−5 m2/s3 and the critical turbulence dissipation rate for aggregation distribution is 3.81 × 10−6 m2/s3 in shallow lakes. A quantitative comparison of the effects of physical/physiological processes on blooms shows that physiological processes (CSV, GRV, and BCT) are critical for biomass enrichment, and the accumulation of Microcystis at the water surface is dominated by physical processes (VMT). This study reveals the mechanisms of turbulence‐driven Microcystis blooms and provides new insights for algal bloom prediction and control.

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Section: Resultssupporting

confidence: 71%

Modeling Physical and Physiological Processes Reveals the Role of Turbulence in the Prerequisites for Microcystis Blooms

Li,

Gao,

Sun

2024

Water Resources Research

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“…Therefore, the discussion focused on the variations in qN. As a regulatory function, non-photochemical quenching was found to either increase (Nama et al, 2019;Rocha et al, 2021) or decrease (Almeida et al, 2021;Aparicio et al, 2022) with increased concentration of toxic substances. This divergence may be due to the fact that most previous studies have only focused on a single time point without temporal trends.…”

Section: Npq Parametersmentioning

confidence: 99%

Photosynthetic response of Chlamydomonas reinhardtii and Chlamydomonas sp. 1710 to zinc toxicity

Zhan,

Liu,

et al. 2024

Front. Microbiol.

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Zinc (Zn) is an essential trace element but can lead to water contamination and ecological deterioration when present in excessive amounts. Therefore, investigating the photosynthetic response of microalgae to Zn stress is of great significance. In this study, we assessed the photosynthetic responses of neutrophilic Chlamydomonas reinhardtii and acidophilic Chlamydomonas sp. 1710 to Zn exposure for 96 h. The specific growth rate (μ), chlorophyll-a (Chl-a) content, and chlorophyll fluorescence parameters were determined. The results demonstrated that Chlamydomonas sp. 1710 was much more tolerant to Zn than C. reinhardtii, with the half-maximal inhibitory concentration (IC50) values of 225.4 mg/L and 23.4 mg/L, respectively. The μ and Chl-a content of C. reinhardtii decreased in the presence of 15 mg/L Zn, whereas those of Chlamydomonas sp. 1710 were unaffected by as high as 100 mg/L Zn. Chlorophyll fluorescence parameters indicated that the regulation of energy dissipation, including non-photochemical quenching, played a crucial role in Zn stress resistance for both Chlamydomonas strains. However, in the case of C. reinhardtii, non-photochemical quenching was inhibited by 5 mg/L Zn in the first 48 h, whereas for Chlamydomonas sp. 1710, it remained unaffected under 100 mg/L Zn. Chlamydomonas sp. 1710 also exhibited a 20 times stronger capacity for regulating the electron transfer rate than C. reinhardtii under Zn stress. The light energy utilization efficiency (α) of Chlamydomonas sp. 1710 had the most highly non-linear correlation with μ, indicating the energy utilization and regulation process of Chlamydomonas sp. 1710 was well protected under Zn stress. Collectively, our findings demonstrate that the photosystem of Chlamydomonas sp. 1710 is much more resilient and tolerant than that of C. reinhardtii under Zn stress.

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Increasing the cell productivity of mixotrophic growth of Spirulina sp. LEB 18 with crude glycerol

Morais

Nunes

Druzian

et al. 2022

Biomass Conv. Bioref.

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Global sensitivity and uncertainty analysis of a microalgae model for wastewater treatment

Cited by 11 publications

References 55 publications

Modeling Physical and Physiological Processes Reveals the Role of Turbulence in the Prerequisites for Microcystis Blooms

Modeling Physical and Physiological Processes Reveals the Role of Turbulence in the Prerequisites for Microcystis Blooms

Photosynthetic response of Chlamydomonas reinhardtii and Chlamydomonas sp. 1710 to zinc toxicity

Increasing the cell productivity of mixotrophic growth of Spirulina sp. LEB 18 with crude glycerol

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