Removing chemical and biological pollutants from swine wastewater through constructed wetlands aiming reclaimed water reuse

Bôto, Maria Luis de Vilar Correia Brito; Dias, Sofia; Crespo, Rute Duarte; Mucha, Ana P.; Almeida, C. Marisa R.

doi:10.1016/j.jenvman.2022.116642

Cited by 14 publications

(4 citation statements)

References 55 publications

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“…These bacteria exhibit synergistic interactions with genera associated to nitrification and denitrification ( Wang G. et al, 2022 ). Hence, the effluent microbiome showed higher abundance of genera than the influent, resulting in a bacterial diversification that potentially contributed to higher pollutant removal, enhanced different metabolic pathways, and increased stability in the ecosystem, as previously observed ( Choi et al, 2022 ; Bôto et al, 2023 ).…”

Section: Resultssupporting

confidence: 69%

“…Before CWs treatment, the LFDs population was dominated by Firmicutes, accounting for 53–66% of the community. This phylum is frequently detected in digestate and other livestock effluents ( Koniuszewska et al, 2021 ; Bôto et al, 2023 ; Pan et al, 2023 ). Cloacimonadota and Bacteroidota, with relative abundances of 9 and 8% on average, respectively, were the following phyla more abundant, also reported previously in digestates ( Koniuszewska et al, 2021 ; Blasco et al, 2022 ; Pan et al, 2023 ).…”

Section: Resultsmentioning

confidence: 99%

“…In this study, this abundant phylum was followed by Firmicutes, Proteobacteria, Bacteroidota, and Verrucomicrobiota. Proteobacteria, widely detected in CWs substrates and effluents, comprises the main functional microorganisms involved in the removal of organic matter, nitrogen, and antibiotics from various types of wastewaters ( Wang J. et al, 2022 ; Bôto et al, 2023 ).…”

Section: Resultsmentioning

confidence: 99%

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Removal of metals and emergent contaminants from liquid digestates in constructed wetlands for agricultural reuse

Porras-Socias,

Tomasino,

Fernandes

et al. 2024

Front. Microbiol.

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Given the increasing pressure on water bodies, it is imperative to explore sustainable methodologies for wastewater treatment and reuse. The simultaneous presence of multiples contaminants in complex wastewater, such as the liquid effluents from biogas plants, can compromise biological treatment effectiveness for reclaiming water. Vertical subsurface flow constructed wetlands were established as low-cost decentralized wastewater treatment technologies to treat the liquid fraction of digestate from municipal organic waste with metals, antibiotics, and antibiotic resistance genes, to allow its reuse in irrigation. Twelve lab-scale planted constructed wetlands were assembled with gravel, light expanded clay aggregate and sand, testing four different treating conditions (liquid digestate spiked with oxytetracycline, sulfadiazine, or ofloxacin, at 100 μg/ L, or without dosing) during 3 months. Physicochemical parameters (pH, chemical oxygen demand (COD), nutrients, metals, and antibiotics), the microbial communities dynamics (through 16S high-throughput sequencing) and antibiotic resistance genes removal (qPCR) were monitored in influents and effluents. Systems removed 85.8%–96.9% of organic matter (as COD), over 98.1% of ammonium and phosphate ions, and 69.3%–99.4% of nitrate and nitrite ions, with no significant differences between the presence or absence of antibiotics. Removal of Fe, Mn, Zn, Cu, Pb and Cr exceeded 82% in all treatment cycles. The treatment also removed oxytetracycline, sulfadiazine and ofloxacin over 99%, and decreased intl1, tetA, tetW, sul1 and qnrS gene copies. Nonetheless, after 3 months of ofloxacin dosing, qnrS gene started being detected. Removal processes relied on high HRT (14 days) and various mechanisms including sorption, biodegradation, and precipitation. Microbial community diversity in liquid digestate changed significantly after treatment in constructed wetlands with a decrease in the initial Firmicutes dominance, but with no clear effect of antibiotics on the microbial community structure. Removals above 85% and 94% were observed for Streptococcus and Clostridium, respectively. Results suggest that vertical subsurface flow constructed wetlands were a suitable technology for treating the liquid digestate to reuse it in irrigation agricultural systems, contributing to the circular bioeconomy concept. However, a more profound understanding of effective wastewater treatment strategies is needed to avoid antibiotic resistance genes dissemination.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Removal of metals and emergent contaminants from liquid digestates in constructed wetlands for agricultural reuse

Porras-Socias,

Tomasino,

Fernandes

et al. 2024

Front. Microbiol.

Self Cite

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“…However, regardless of the kind of constructed wetland process, further research is needed. At present, there is still a lack of comprehensive lifecycle assessment analysis for constructed wetlands [53]. The most critical thing is solving the problem of intensive land use and optimizing process parameter settings to improve the economic feasibility and environmental sustainability of these technology combinations.…”

Section: Constructed Wetlandsmentioning

confidence: 99%

Research Advancements in Swine Wastewater Treatment and Resource-Based Safe Utilization Management Technology Model Construction

Chen,

Zhu,

et al. 2024

Water

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Swine wastewater contains large amounts of organic matter, nutrients, toxic metal elements, and antibiotics. If it is directly discharged or not properly treated, it poses a significant threat to the environment and human health. Currently, the management of swine wastewater has become a focus of social attention, and it adopts a dual-track parallel model of standard discharge supplemented by resource utilization. If treated properly, it can achieve the recycling of water resources and promote the effective recovery of resources. Based on the pollution characteristics of swine wastewater, this paper analyzes its impact on the environment, society, and the economy in detail and expounds on the research progress of swine wastewater treatment technology. From the perspective of resource utilization and recycling of anaerobic digestion liquid (biogas slurry) from swine wastewater and the carrying capacity of the soil environment and cumulative ecological environmental risks, this study explores new development trends and application prospects for swine wastewater treatment technology.

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Effect of substituting water source on the methane production from lignocellulosic biowaste during anaerobic digestion

Chen,

Song,

Jin

et al. 2024

Env Prog and Sustain Energy

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The escalating global volume of sewage discharge presents a formidable challenge for sewage treatment facilities, necessitating the efficient utilization of sewage. Given the substantial demand on water resource during anaerobic digestion (AD), this study investigated the feasibility of substituting pure water with sewage as the main water source for AD using six diverse lignocellulosic wastes (rice straw, vinegar residue, cattle manure, sheep manure, napkin, and office wastepaper) as feedstocks. The results showed that the methane production of lignocellulosic waste + raw wastewater (WW) during AD increased by at least 5% compared with the control groups. Specially, the cumulative methane yield of napkin mixed with the WW reached to 218.3 mL/gVS with the increase of 47.8% compared with the control group (147.7 mL/gVS). The results indicated that the relative abundance of characteristic bacteria and methanogenic archaea during AD was closely related to the kinds of feedstocks and water source. The addition of WW increased the relative abundance of bacteria and archaea in the digester, which might be the main reason for the higher methane production with the addition of WW. Treated wastewater and reclaimed water had a relatively neglectable impact on the microbial community structure in AD. This study not only saved water resources in AD but also provided a strong reference for resource utilization of sewage and organic solid waste.

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Removing chemical and biological pollutants from swine wastewater through constructed wetlands aiming reclaimed water reuse

Cited by 14 publications

References 55 publications

Removal of metals and emergent contaminants from liquid digestates in constructed wetlands for agricultural reuse

Removal of metals and emergent contaminants from liquid digestates in constructed wetlands for agricultural reuse

Research Advancements in Swine Wastewater Treatment and Resource-Based Safe Utilization Management Technology Model Construction

Effect of substituting water source on the methane production from lignocellulosic biowaste during anaerobic digestion

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