Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry
Abstract Duckweed is an important plant for wastewater remediation and a promising alternative protein source for animal feed. This study aims to evaluate the biomass, protein accumulation, and wastewater purification capacity of duckweed under controlled cultivation conditions. Using pig farm bioga...
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Nature Portfolio
2025-02-01
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| Online Access: | https://doi.org/10.1038/s41598-025-89524-w |
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| author | Jiaquan Li Ya Gao Yaoru Xie Junyi Li Jiazhou Li Cheng Ran |
| author_facet | Jiaquan Li Ya Gao Yaoru Xie Junyi Li Jiazhou Li Cheng Ran |
| author_sort | Jiaquan Li |
| collection | DOAJ |
| description | Abstract Duckweed is an important plant for wastewater remediation and a promising alternative protein source for animal feed. This study aims to evaluate the biomass, protein accumulation, and wastewater purification capacity of duckweed under controlled cultivation conditions. Using pig farm biogas slurry as a nutrient source, this study analyzes the purification ability of duckweed at different slurry concentrations (2%, 4%, 6%, 8%, 10%) on chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and ammonia nitrogen (NH3-N) in biogas slurry. The study also describes changes in duckweed weight, chlorophyll content, and protein accumulation. Our results showed that a 4% biogas slurry concentration was the optimum condition for the cultivation of duckweed, which corresponded to an NH3-N concentration of 29.56 mg/L. The dry matter production capacity of duckweed under these conditions was 1.78 g/(d·m2), the relative growth rate (RGR) was 0.29 g/(g·d), the doubling time was 2.42 days, and the protein content was 36.25% by dry weight. In terms of pollutant removal, duckweed efficiently removed 54.69% of COD, 86.89% of TN, 97.25% of NH3-N, and 85.22% of TP. The results of this study provide an important reference for the operation of the duckweed production system, which is crucial for the design and operation of pilot-scale and large-scale duckweed production systems moving forward. |
| format | Article |
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| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-2ee4b8afbb3246a8930258d61fc2c4a62025-08-20T02:48:12ZengNature PortfolioScientific Reports2045-23222025-02-0115111810.1038/s41598-025-89524-wOptimal cultivation concentration of duckweed for pollutant removal from biogas slurryJiaquan Li0Ya Gao1Yaoru Xie2Junyi Li3Jiazhou Li4Cheng Ran5Heyuan Branch, Guangdong Laboratory for Lingnan Modern AgricultureHeyuan Branch, Guangdong Laboratory for Lingnan Modern AgricultureHeyuan Branch, Guangdong Laboratory for Lingnan Modern AgricultureHeyuan Branch, Guangdong Laboratory for Lingnan Modern AgricultureInstitute of Animal Science Guangdong Academy of Agricultural Sciences, State key aboratory of Livestock and Poultry BreedingHeyuan Branch, Guangdong Laboratory for Lingnan Modern AgricultureAbstract Duckweed is an important plant for wastewater remediation and a promising alternative protein source for animal feed. This study aims to evaluate the biomass, protein accumulation, and wastewater purification capacity of duckweed under controlled cultivation conditions. Using pig farm biogas slurry as a nutrient source, this study analyzes the purification ability of duckweed at different slurry concentrations (2%, 4%, 6%, 8%, 10%) on chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and ammonia nitrogen (NH3-N) in biogas slurry. The study also describes changes in duckweed weight, chlorophyll content, and protein accumulation. Our results showed that a 4% biogas slurry concentration was the optimum condition for the cultivation of duckweed, which corresponded to an NH3-N concentration of 29.56 mg/L. The dry matter production capacity of duckweed under these conditions was 1.78 g/(d·m2), the relative growth rate (RGR) was 0.29 g/(g·d), the doubling time was 2.42 days, and the protein content was 36.25% by dry weight. In terms of pollutant removal, duckweed efficiently removed 54.69% of COD, 86.89% of TN, 97.25% of NH3-N, and 85.22% of TP. The results of this study provide an important reference for the operation of the duckweed production system, which is crucial for the design and operation of pilot-scale and large-scale duckweed production systems moving forward.https://doi.org/10.1038/s41598-025-89524-wLemna aequinoctialisNutrient recoveryWastewater remediationBiomass and protein productionSwine wastewater |
| spellingShingle | Jiaquan Li Ya Gao Yaoru Xie Junyi Li Jiazhou Li Cheng Ran Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry Scientific Reports Lemna aequinoctialis Nutrient recovery Wastewater remediation Biomass and protein production Swine wastewater |
| title | Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| title_full | Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| title_fullStr | Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| title_full_unstemmed | Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| title_short | Optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| title_sort | optimal cultivation concentration of duckweed for pollutant removal from biogas slurry |
| topic | Lemna aequinoctialis Nutrient recovery Wastewater remediation Biomass and protein production Swine wastewater |
| url | https://doi.org/10.1038/s41598-025-89524-w |
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