Valorization of swine wastewater in a circular economy approach: Effects of hydraulic retention time on microalgae cultivation

Silveira, Carolina Ferrari; Assis, Letícia Rodrigues de; Oliveira, Adriana Paulo de Sousa; Calijuri, Maria Lúcia

doi:10.1016/j.scitotenv.2021.147861

Cited by 32 publications

(7 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the produced biomass, ash content varied between 20.0% (SU24h) and 44.7% (SP12h). Other authors also observed high ashes content in microalgae grown in different effluents like piggery (39.0%, Silveira et al, 2021) and domestic (20.5%, Assis et al, 2020) wastewaters. According to these authors, wastewaters have suspended particles and metals that can contribute to this high ash content.…”

Section: Biomass Chemical Characteristics and Possible Applicationmentioning

confidence: 86%

Tertiary Urban Wastewater Treatment with Microalgae Natural Consortia in Novel Pilot Photobioreactors

Morais¹,

Marques²,

Cerqueira³

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

Section: Biomass Chemical Characteristics and Possible Applicationmentioning

confidence: 86%

Tertiary Urban Wastewater Treatment with Microalgae Natural Consortia in Novel Pilot Photobioreactors

Morais¹,

Marques²,

Cerqueira³

et al. 2022

SSRN Journal

View full text Add to dashboard Cite

“…This flushing effect greatly reduces the possibility of nutrient overload in the water, thereby improving the self-purification capacity of the continuous-flow water system. Additionally, the self-purification ability of the water body is closely linked to the hydraulic retention time [37]. Moreover, the continuous-flow water system prevents the aggregation of microalgae, which could otherwise impact the algaelysing effect of the solar ultrasonic carbon fiber ecological floating-bed system.…”

Section: The Influence Of Hydraulic Retention Time (Hrt) On the Varia...mentioning

confidence: 99%

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

Zeng,

Liang,

Tang

et al. 2023

Water

View full text Add to dashboard Cite

Harmful cyanobacterial blooms pose a major threat. Among them, Microcystis aeruginosa has raised serious concerns for human health due to its frequent occurrence. In this study, an ecological floating-bed system consisting of activated carbon fibers, aquatic plants (Ipomoea aquatica Forsskal), animals (Daphnia), and a solar-powered ultrasonic device was designed. The algae-killing efficiency, removal mechanism, and toxicological effects of the floating-bed system on Microcystis aeruginosa were determined under different conditions. The results showed that the average activity of algal cell dehydrogenase (DHA) was reduced by 64.09%, the average malondialdehyde (MDA) content was reduced to 0.125 μmol/L, and the average removal rate of soluble protein was 57.22% under optimal conditions (pH = 7, temperature = 25 °C, dissolved oxygen concentration = 5 mg/L, and hydraulic retention time = 36 h). Scanning electron microscopy (SEM) analysis showed that the structure within the cells of Microcystis aeruginosa was severely damaged after treatment with the solar-powered ultrasonic carbon fiber eco-floating-bed system. Fourier transform infrared (FTIR) spectroscopy analysis showed that the pyrrole ring of chlorophyll-a was degraded. In addition, a tadpole-based micronucleus test and a comet assay were conducted to assess cell viability and DNA damage in water samples treated with the floating-bed system, and the results confirmed that chromosome damage and genotoxicity were significantly reduced. These findings suggest that the floating-bed system is effective in destroying algal cells, leading to massive algal cell death and reducing the risk of secondary contamination. This study provides a new perspective for further research on ecological floating-bed technology, demonstrating its potential practical application in the prevention and control of cyanobacterial blooms.

show abstract

“…Additionally, the application of rainwater collecting systems would lead to reduced demand for water. Silveira et al [32] applied the CE framework in microalgae cultivation at varying retention times in the treatment of swine wastewater. The outcome demonstrated that the study contributed to the reduction of water footprint and long-term viability in the pig farming production chain.…”

Section: Outcome Of the Reviewmentioning

confidence: 99%

Circular Economy Framework for Energy Recovery in Phytoremediation of Domestic Wastewater

2022

View full text Add to dashboard Cite

Circular economy (CE) strategy is crucial in developing towards sustainable growth. It was created to promote resource utilization and the elimination of waste production. This article aimed to study the possibilities of using the CE framework in wastewater bioremediation and energy recovery using hydroponic tanks. The integration of phytoremediation with bioenergy, construction and lifespan of hydroponic tanks in phytoremediation of wastewater, selection of aquatic plants and the expected challenges in the implementation of CE in phytoremediation of wastewater were discussed. The plant-based biomass harvested and the relative growth rate (RGR) of the selected plants from the phytoremediation process was evaluated. The findings obtained indicated that the selected plants tripled in weight after 14 days cultivation period at different retention times. E. crassipes recorded the highest growth with 2.5 ± 0.03 g g−1 d−1, followed by S. molesta with 1.33 ± 0.05 g g−1 d−1 and then P. stratiotes recorded 0.92 ± 0.27 g g−1 d−1 at the end of the cultivation period. Therefore, the selected plants have been identified as having the potential to be used in phytoremediation as well as a source of energy production. The outcome of our review suggested the adoption of a lifecycle assessment as the CE framework for the phytoremediation of wastewater.

show abstract

Valorization of swine wastewater in a circular economy approach: Effects of hydraulic retention time on microalgae cultivation

Cited by 32 publications

References 77 publications

Tertiary Urban Wastewater Treatment with Microalgae Natural Consortia in Novel Pilot Photobioreactors

Tertiary Urban Wastewater Treatment with Microalgae Natural Consortia in Novel Pilot Photobioreactors

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

Circular Economy Framework for Energy Recovery in Phytoremediation of Domestic Wastewater

Contact Info

Product

Resources

About