Duckweed systems for eutrophic water purification through converting wastewater nutrients to high-starch biomass: comparative evaluation of three different genera (Spirodela polyrhiza, Lemna minor and Landoltia punctata) in monoculture or polyculture

Chen, Guoke; Fang, Yang; Huang, Jun; Zhao, Yuxiao; Li, Qi; Lai, Fan; Xu, Yaliang; Tian, Xueping; He, Kai; Jin, Yanling; Li, Tan; Zhao, Hai

doi:10.1039/c8ra01856a

Cited by 31 publications

(11 citation statements)

References 53 publications

(90 reference statements)

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“…Lemnaceae (commonly known as water lens or duckweed) is a family of monocotyledonous water plants (Landolt, 1986;Landolt and Kandeler, 1987;Sree et al, 2016) characterized by the fastest growth rates among flowering plants (Sree et al, 2015b;Ziegler et al, 2015). As a consequence, the rate of biomass production is high, which provides the basis for different practical applications of duckweeds in the areas of food and feed sustainability (Landolt and Kandeler, 1987;Appenroth et al, 2017Appenroth et al, , 2018Sonta et al, 2019) and biotechnology (Zhao et al, 2015;Chen et al, 2018;Kaur et al, 2018;Ren et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Duckweed (Lemnaceae): Its Molecular Taxonomy

Bog

Appenroth

Sree

2019

Front. Sustain. Food Syst.

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Section: Introductionmentioning

confidence: 99%

Duckweed (Lemnaceae): Its Molecular Taxonomy

Bog

Appenroth

Sree

2019

Front. Sustain. Food Syst.

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“…TN and TP removal efficiencies were calculated using the following equation

R e m o v a l e f f i c i e n c y true(% true) = \frac{C_{0} - C_{normalt}}{C_{0}} \times 100 %

where C 0 is the initial TN or TP concentration (mg L −1 ); C t is the TN or TP concentration (mg L −1 ) at time t .…”

Section: Methodsmentioning

confidence: 99%

Regulating Nutrients and Phytoplankton by Extending the Habitats of Periphyton in a Deep River‐Type Reservoir

Peng

Qin

et al. 2018

CLEAN Soil Air Water

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Eutrophication and phytoplankton blooms threaten the water quality of many, reservoirs especially deep ones. Periphyton is an important component of aquatic ecosystems that can compete with phytoplankton for light and nutrients. However, studies on the dynamics of periphyton development in deep reservoirs are rare. Here, the growth characteristics of periphyton on the artificial substrate (AS) in both open water and enclosures of the Three Gorges Reservoir (TGR) are investigated. The development and relative importance of periphyton are analyzed. The results indicate that mass growth of periphyton is observed on the AS platforms after several weeks. A potential phosphorus limitation for periphyton development in the TGR is evidenced by the relatively high TN/TP ratio in the water column. The differences of phytoplankton biomass in two enclosures suggest the existence of interactions between phytoplankton and periphyton. The results indicate that the artificially loaded AS on the water surface of the deep reservoir leads to the redistribution of nutrients and light between phytoplankton and periphyton. The results are very encouraging because the use of AS for periphyton incubation is an economical and practical way to reduce the probability of phytoplankton blooms in deep reservoirs, especially when the nutrient loads cannot be reduced effectively in a short period.

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“…Although Chen et al [19] found that L. punctata has a good repair effect on eutrophic water, little is known about the changes in the physiological and biochemical indexes of L. punctata during the repair process. In this study, we found that after 15 days of co-cultivation of L. punctata and the gradient density M. aeruginosa was higher than the "water bloom" burst level, the biomass of L. punctata showed a trend of increasing first and then decreasing.…”

Section: Effects Of M Aeruginosa On the Growth Of L Punctatamentioning

confidence: 99%

Bioremediation of Landoltia punctata to Microcystis aeruginosa Contaminated Waters

et al. 2020

Water

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Microcystis aeruginosa is one of the dominant algae in the “phytoplankton bloom” phenomenon. A high density of microcystins (MCs) are produced when algae have explosive growth, which can damage the water environment and pose a great threat to aquatic animals, plants, and human health. Duckweed (Landoltia punctata) is a morphologically highly degraded flowering plant with a short growth cycle and wide environmental adaptability. Importantly, duckweed can grow in eutrophic water and has great potential in water remediation. The present study aims to analyze the physiological and biochemical changes of L. punctata when co-culturing with M. aeruginosa in the laboratory. Our results showed that all the biomass, chlorophyll content, antioxidant enzyme activities, and amylase activity of L. punctata increased in 2 × 108 cells/L and 4 × 108 cells/L for M. aeruginosa, and also significantly reduced in 1.6 × 109 cells/L for M. aeruginosa, while cytotoxic substance (malondialdehyde (MDA)) content showed a completely opposite trend. After co-culturing, it was found that the MC content in L. punctata reduced to 138.87 g/g, and the MC removal rate was 29.48%. These results indicate that L. punctata can grow normally in high-density M. aeruginosa, which paves the way for L. punctata’s bioremediation of water polluted by M. aeruginosa.

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Duckweed systems for eutrophic water purification through converting wastewater nutrients to high-starch biomass: comparative evaluation of three different genera (Spirodela polyrhiza, Lemna minor and Landoltia punctata) in monoculture or polyculture

Abstract: This study provides a new insight into the application of duckweed in eutrophic water advanced treatment and starch production.

Cited by 31 publications

References 53 publications

Duckweed (Lemnaceae): Its Molecular Taxonomy

Duckweed (Lemnaceae): Its Molecular Taxonomy

Regulating Nutrients and Phytoplankton by Extending the Habitats of Periphyton in a Deep River‐Type Reservoir

Bioremediation of Landoltia punctata to Microcystis aeruginosa Contaminated Waters

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