The influence of light intensity and photoperiod on duckweed biomass and starch accumulation for bioethanol production

Yin, Yehu; Yu, Changjiang; Yu, Lihua; Zhao, Jinshan; Sun, Changjiang; Ma, Yutao; Zhou, Gongke

doi:10.1016/j.biortech.2015.03.097

Cited by 108 publications

(72 citation statements)

References 34 publications

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“…The biomass production revealed a lag phase of two days followed by an exponential growth until tenth day, beyond which no growth was observed (Figure 2). Similar results were found by Yin et al [19], obtaining the maximum biomass production at day 12, with a photoperiod of 12:12. Also, they reported a 7,500 lux as the optimum light intensity for duckweed growth.…”

Section: Duckweed Growth and Nutrient Removalsupporting

confidence: 90%

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Pena¹,

Oliveira²,

Fragoso³

et al. 2017

J. sustain. dev. energy water environ. syst.

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Over the last decades, phytodepuration has been considered an efficient technology to treat wastewaters. The present study reports a bench scale depuration assay of swine wastewater using Lemna minor. The highest observed growth rate obtained in swine wastewater was 3.1 ± 0.3 gDW m , respectively. The chemical oxygen demand removal efficiency in the swine wastewater assay was 58.9 ± 2.0%. Furthermore, the biomass valorisation by anaerobic co-digestion with swine wastewater was assessed. Results showed a clear improvement in specific methane production rate (around 40%) when compared to mono-substrate anaerobic digestion. The highest methane specific production, 131.0 ± 0.8 mL CH4 g −1 chemical oxygen demand, was obtained with a mixture containing 100 g of duckweed per liter of pre-treated swine wastewater. The water-nutrients-energy nexus approach showed to be promising for swine waste management.

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Section: Duckweed Growth and Nutrient Removalsupporting

confidence: 90%

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Pena¹,

Oliveira²,

Fragoso³

et al. 2017

J. sustain. dev. energy water environ. syst.

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“…The effects of bacterial communities on the 7-day growth of L. minor ranged from −24 to +14%, which indicates that a 1.5-fold difference in duckweed yield can be controlled by selecting a bacterial community. Approximately, the same change in relative growth rate of L. minor was observed with light intensities of 400 and 110 µmol/m 2 /s [20], and ammonium (as a sole nitrogen source) concentrations of 28 and 2 mg/L [33]. Considering these facts, environmental bacterial communities were shown to be a critical factor that affects duckweed growth, with effects that are comparable with other important environmental factors such as light and nutrients.…”

Section: Discussionmentioning

confidence: 79%

“…The effects of nutrient strength [18, 19], light intensity, photoperiod [20], and temperature [19] on duckweed growth and starch accumulation have also been examined to improve the production.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of environmental bacterial communities as a factor affecting the growth of duckweed Lemna minor

Ishizawa

Kuroda

Morikawa

et al. 2017

Biotechnol Biofuels

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BackgroundDuckweed (family Lemnaceae) has recently been recognized as an ideal biomass feedstock for biofuel production due to its rapid growth and high starch content, which inspired interest in improving their productivity. Since microbes that co-exist with plants are known to have significant effects on their growth according to the previous studies for terrestrial plants, this study has attempted to understand the plant–microbial interactions of a duckweed, Lemna minor, focusing on the growth promotion/inhibition effects so as to assess the possibility of accelerated duckweed production by modifying co-existing bacterial community.ResultsCo-cultivation of aseptic L. minor and bacterial communities collected from various aquatic environments resulted in changes in duckweed growth ranging from −24 to +14% compared to aseptic control. A number of bacterial strains were isolated from both growth-promoting and growth-inhibitory communities, and examined for their co-existing effects on duckweed growth. Irrespective of the source, each strain showed promotive, inhibitory, or neutral effects when individually co-cultured with L. minor. To further analyze the interactions among these bacterial strains in a community, binary combinations of promotive and inhibitory strains were co-cultured with aseptic L. minor, resulting in that combinations of promotive–promotive or inhibitory–inhibitory strains generally showed effects similar to those of individual strains. However, combinations of promotive–inhibitory strains tended to show inhibitory effects while only Aquitalea magnusonii H3 exerted its plant growth-promoting effect in all combinations tested.ConclusionSignificant change in biomass production was observed when duckweed was co-cultivated with environmental bacterial communities. Promotive, neutral, and inhibitory bacteria in the community would synergistically determine the effects. The results indicate the possibility of improving duckweed biomass production via regulation of co-existing bacterial communities.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0746-8) contains supplementary material, which is available to authorized users.

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“…Besides nutrient concentrations, temperature, and photoperiod and light intensity (Yin et al 2015), there are other factors that can modify the macrophyte biomass production, such as the frequency of harvest and the presence of other macrophytes species. Throughout the test, water average temperature was high (24°C) because the trial was carried out in late spring, which is an important factor in biomass production and nutrient removal from wastewater since with a temperature of 27°C the area colonized by duckweed can be doubled every 4 days (Curt Fernández de la Mora 2005).…”

Section: Biomass Of S Intermediamentioning

confidence: 99%

Poultry Effluent Bio-treatment with Spirodela intermedia and Periphyton in Mesocosms with Water Recirculation

Basílico

Cabo

Magdaleno

et al. 2016

Water Air Soil Pollut

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Industrial production of poultry meat is associated with indirect environmental impacts such as contributing to climate change and deforestation and other direct impacts such as the deterioration of the quality of surface waters. Poultry industry effluents are rich in organic matter, nitrogen, and phosphorus; nutrients can be removed from wastewater through the use of macrophytes and periphyton. An essay in mesocosms with poultry industry wastewater recirculation was developed in the presence and absence of a native macrophyte Spirodela intermedia and periphyton from a lowland stream (La Choza stream, Buenos Aires) where the effluent is poured. The diffusion of O 2 , increased by water recirculation, had the effect of increasing the concentration of dissolved oxygen in wastewater. The presence of S. intermedia and algae periphyton significantly contributed to the removal rates (%) of solids (69.7 ± 3.9), ammonium nitrogen (84.0 ± 3.4), and total phosphorus (38.1 ± 1.8) from residual water and favored nitrification. The dominance of Bacillariophyceae on other groups of algae of periphyton and the low representation of Euglenophyceae indicated an advanced stage of the effluent treatment process at the end of the assay.

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The influence of light intensity and photoperiod on duckweed biomass and starch accumulation for bioethanol production

Cited by 108 publications

References 34 publications

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Evaluation of environmental bacterial communities as a factor affecting the growth of duckweed Lemna minor

Poultry Effluent Bio-treatment with Spirodela intermedia and Periphyton in Mesocosms with Water Recirculation

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