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

Kang, Donghan; Kim, Keugtae; Heo, Tae‐Young; Kwon, Gyutae; Lim, Chaeseung; Park, Jungsu

doi:10.3390/su11102951

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…YC001 was found to be under 0.05% CO 2 concentration and light intensity of 400 µE/m 2 /s [67]. Additionally, highest photosynthetic activity and maximum oxygen production rate were found to be with green light, at different microalgae loadings [68].…”

Section: Condition Of Growth Of Microalgae In Pomementioning

confidence: 86%

Microalgae Cultivation in Palm Oil Mill Effluent (POME) Treatment and Biofuel Production

et al. 2021

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Palm oil mill effluent (POME) is the wastewater produced during the palm oil sterilization process, which contains substantial amounts of nutrients and phosphorous that are harmful to the environment. High BOD and COD of POME are as high as 100,000 mg/L, which endanger the environment. Effective pre-treatment of POME is required before disposal. As microalgae have the ability of biosorption on nutrients and phosphorous to perform photosynthesis, they can be utilized as a sustainable POME treatment operation, which contributes to effective biofuel production. Microalgae species C. pyrenoidosa has shown to achieve 68% lipid production along with 71% nutrient reduction in POME. In this study, a brief discussion about the impacts of POME that will affect the environment is presented. Additionally, the potential of microalgae in treating POME is evaluated along with its benefits. Furthermore, the condition of microalgae growth in the POME is also assessed to study the suitable condition for microalgae to be cultivated in. Moreover, experimental studies on characteristics and performance of microalgae are being evaluated for their feasibility. One of the profitable applications of POME treatment using microalgae is biofuel production, which will be discussed in this review. However, with the advantages brought from cultivating microalgae in POME, there are also some concerns, as microalgae will cause pollution if they are not handled well, as discussed in the last section of this paper.

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Section: Condition Of Growth Of Microalgae In Pomementioning

confidence: 86%

Microalgae Cultivation in Palm Oil Mill Effluent (POME) Treatment and Biofuel Production

et al. 2021

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“…Hence, the highest chlorophyll-a content in A. falcatus was obtained on day 15 at 702 lux which was the lowest light intensity employed in this study. Although light is important for chlorophyll synthesis, very high light intensities inhibit chloroplast development [43,44]. On the whole, the chlorophyll-a contents of A. falcatus were significantly higher (P < 0.05) than those of C. sorokiniana under all the light intensities investigated.…”

Section: Chlorophyll-a Production In Bbmmentioning

confidence: 92%

Effects of light on cell growth, chlorophyll, and carotenoid contents of Chlorella sorokiniana and Ankistrodesmus falcatus in poultry dropping medium

Chizie¹,

Onyekwere²,

Nwakego³

2021

J App Biol Biotech.

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Microalgae biomass and their products are invaluable bio-resources with numerous applications in food, feed, pharmacy, cosmetics, and environments. The effects of light intensities on biomass, chlorophyll-a, and total carotenoid production by Chlorella sorokiniana and Ankistrodesmus falcatus were studied in Bold's Basal Medium (BBM) and Poultry Medium (PM) as the growth media. The growth of C. sorokiniana and A. falcatus increased with increase in light intensity in PM and was inhibited at 1786 lux in C. sorokiniana in BBM. PM supported higher biomass production by C. sorokiniana than BBM while it was the reverse for A. falcatus. A. falcatus produced higher (P ≤ 0.05) concentrations of chlorophyll-a than C. sorokiniana in both media. The highest carotenoid concentration of 11.84 mg/g-biomass was accumulated by C. sorokiniana in PM as against 7.027 mg/g-biomass obtained in BBM. On the other hand, the highest carotenoid concentration of 7.633 mg/g-biomass was accumulated by A. falcatus in BBM as against 4.299 mg/g-biomass obtained in PM. It is interesting to note in the present study that a cheap medium such as PM supported higher biomass and carotenoid production by C. sorokiniana than BBM.

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“…Light is the most important energy source, as it enables microalgae to carry out photosynthesis (Gon Alves et al, 2016). Moreover, chloroplast growth and the synthesis of chlorophyll in microalgal cells are also dependent on light, so light is very important for photosynthesis (Kang et al, 2019). However, when light moves from the air into the water, the light intensity is gradually reduced, and if the water contains some particles, the light also scatters.…”

Section: Effects Of Ecological Factors On the Algal–bacterial Communitymentioning

confidence: 99%

Advances in the use of microalgal–bacterial consortia for wastewater treatment: Community structures, interactions, economic resource reclamation, and study techniques

Jia

et al. 2021

Water Environment Research

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The rise in living standards has generated a demand for higher aquatic environmental quality. The microalgal community and the surrounding organic molecules, environmental factors, and microorganisms, such as bacteria, are together defined as the phycosphere. The bacteria in the phycosphere can form consortia with microalgae through various forms of interaction. The study of the species in these consortia and their relative proportions is of great significance in determining the species and strains of stable algae that can be used in sewage treatment. This article summarizes the following topics: the interactions between microalgae and bacteria that are required to establish consortia; how symbiosis between algae and bacteria is established; microalgal competition with bacteria through inhibition and anti‐inhibition strategies; the influence of environmental factors on microalgal–bacterial aggregates, such as illumination conditions, pH, dissolved oxygen, temperature, and nutrient levels; the application of algal–bacterial aggregates to enhance biomass production and nutrient reuse; and techniques for studying the community structure and interactions of algal–bacterial consortia, such as microscopy, flow cytometry, and omics. Practitioner points Community structures in microalgal–bacterial consortia in wastewater treatment. Interactions between algae and bacteria in wastewater treatment. Effects of ecological factors on the algal–bacterial community in wastewater treatment. Economically recycling resources from algal–bacterial consortia based on wastewater. Technologies for studying microalgal–bacterial consortia in wastewater treatment.

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

Cited by 11 publications

References 32 publications

Microalgae Cultivation in Palm Oil Mill Effluent (POME) Treatment and Biofuel Production

Microalgae Cultivation in Palm Oil Mill Effluent (POME) Treatment and Biofuel Production

Effects of light on cell growth, chlorophyll, and carotenoid contents of Chlorella sorokiniana and Ankistrodesmus falcatus in poultry dropping medium

Advances in the use of microalgal–bacterial consortia for wastewater treatment: Community structures, interactions, economic resource reclamation, and study techniques

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