Nutrient removal and community structure of wastewater-borne algal-bacterial consortia grown in raw wastewater with various wavelengths of light

Kang, Donghan; Kim, Keugtae; Jang, Youngho; Moon, Heechun; Ju, Dongjin; Jahng, Deokjin

doi:10.1016/j.ibiod.2017.09.022

Cited by 51 publications

(14 citation statements)

References 46 publications

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“…Firstly, higher transmittance rate was observed in green light when increasing the concentration of microalgal-bacterial consortia. Previous studies suggested that green light tends to penetrate deeper, and thus shows a stronger resistance to photoinhibition in microalgal-bacterial consortia [29,32]; a conclusion that is also supported by the results of this study. Besides, microalgal-bacterial consortia are less sensitive to an increase of light intensity in green light conditions.…”

Section: Discussionsupporting

confidence: 91%

“…The oxygen production rate of microalgae is affected by the color and intensity of light and the microalgae biomass, where the oxygen production tends to increase at higher light intensities and higher microalgae biomasses [28,29]. Although several studies have tested the effect of different light colors on the oxygen production rate of microalgae, no clear mechanism or conclusive result was suggested yet [23,28,29,31] and interaction of these factors makes it more complicated to understand the oxygen production process in microalgae. For example, an increase in light intensity increases the oxygen production rate, but also causes inhibition of the photosynthetic activities of microalgae for oxygen production over time.…”

Section: Discussionmentioning

confidence: 99%

“…For example, an increase in light intensity increases the oxygen production rate, but also causes inhibition of the photosynthetic activities of microalgae for oxygen production over time. Besides, although more oxygen is expected to be produced at higher microalgae biomass, this is not always true as an increase in biomass also reduces the light transmittance by the shading effect, and thus causes inhibition of the oxygen production [28][29][30].…”

Section: Discussionmentioning

confidence: 99%

“…Although the optimal wavelengths of LEDs considering both algal cultivation and operation cost are still unclear, several studies have verified the effect and characteristics of different wavelengths of light (e.g., blue, green, red, and white) on algal cultivation [24][25][26][27][28]. Kang et al (2018) [29] tested the effect of different wavelengths (light colors) on the oxygen production and nutrient removal rate of microalgal-bacterial consortia in a closed system. Four different wavelengths were applied to two microalgal-bacterial consortia with concentrations of 100 mg L −1 and 500 mg L −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The four different wavelengths (colors of light) used for the test were blue, green, red, and white. They reported that white and red light was most effective for nutrient (i.e., total nitrogen and total phosphorus) removal [29]. However the optimal wavelength can be varied considering the photoinhibition effect, the variation of algal photosynthetic activities at different light intensities, which is also affected by the concentration of microalgae-bacteria.…”

Section: Introductionmentioning

confidence: 99%

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Inhibition of Photosynthetic Activity in Wastewater-Borne Microalgal–Bacterial Consortia under Various Light Conditions

Kang¹,

Kim

Heo

et al. 2019

Sustainability

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Microalgal–bacterial consortia are considered an alternative method to conventional wastewater treatment processes with several benefits, such as low oxygen production cost and reduced emission of carbon dioxide resulting from photosynthetic activity. Besides, microalgae effectively remove various emerging contaminants and heavy metals that are hardly removed by conventional wastewater treatment processes. The purpose of this study is finding optimal operation conditions (e.g., light wavelengths, light intensity, microalgal–bacterial consortia biomass) when applying microalgae in wastewater treatment system. Firstly, reduced transmittance was monitored at four different wavelengths (i.e., blue, green, red, and white light) and at various concentrations of microalgal–bacterial consortia. Light transmittance rates were rapidly reduced as the biomass increased, where the highest transmittance was observed in green light. Secondly, the reduction of oxygen production over time, by the inhibition of the photosynthetic activity, was tested as the light intensity increased at four different wavelengths and at low (100 mg L−1) and high (500 mg L−1) concentrations of microalgal–bacterial consortia. The observations and subsequent statistical analyses verify that microalgal–bacterial consortia show the strongest resistance to the inhibition of the photosynthetic activity in green light, with white coming next, when the intensity of light is increased.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Inhibition of Photosynthetic Activity in Wastewater-Borne Microalgal–Bacterial Consortia under Various Light Conditions

Kang¹,

Kim

Heo

et al. 2019

Sustainability

Self Cite

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Towards Commercialization of Third‐Generation Biofuel Industry for Sustainable Energy Production in Nigeria

Shiru

2021

ChemBioEng Reviews

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Due to the potential depletion of fossil fuels and the need for the shift from its use to combat the aggravated impacts of climate change, the unsustainable use of these conventional fuels has been widely recognized. This has prompted commercialization of biofuels as an alternative sustainable fuel. This study summarizes the potential of third-generation biomass feedstocks, algae, for biofuel production on the example of Nigeria, where most biofuel plants still use first-and second-generation feedstocks, which have led to food and land mass competition. It is shown that the production and consumption of third-generation biofuel is at its infancy in the coun-try. It was also found that the climatic conditions in Nigeria are conducive for the cultivation of microalgae, which are the primary sources of the third-generation biofuel, even though there are barriers such as inadequate reliable resource database for investment decisions and technical expertise to develop and deploy biofuels in commercial form. The large population of Nigeria is a potential market for biofuel, therefore, commercialization of the third-generation biofuel can be a viable alternative energy source to conventional fossil fuels and it can generate employment for many in the country.

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Valorization of Wastewater via Nutrient Recovery Using Algae-Based Processes

Musetsho

Renuka

Ratha

et al. 2020

Algae

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Nutrient removal and community structure of wastewater-borne algal-bacterial consortia grown in raw wastewater with various wavelengths of light

Cited by 51 publications

References 46 publications

Inhibition of Photosynthetic Activity in Wastewater-Borne Microalgal–Bacterial Consortia under Various Light Conditions

Inhibition of Photosynthetic Activity in Wastewater-Borne Microalgal–Bacterial Consortia under Various Light Conditions

Towards Commercialization of Third‐Generation Biofuel Industry for Sustainable Energy Production in Nigeria

Valorization of Wastewater via Nutrient Recovery Using Algae-Based Processes

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