Treatment of wastewater in sewer by <i>Spirogyra sp.</i> green algae: effects of light and carbon sources

Amiri, Roonak; Ahmadi, Mehdi

doi:10.1111/wej.12463

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…Illumination is one of the most common environmental indicators affecting algal growth [31]. Studies have shown that light sources have a very important effect on changes in spirulina growth and nitrite removal, and it was found that the growth of algae and the removal rate of nitrite level are improved under the condition of continuous illumination within a suitable range [32], which is basically consistent with the results of the algaebacteria consortia in this study. In this study, the nitrite absorption rate of the algae-bacteria consortia increased first and then decreased with the increase in illumination, even in the absence of light, the uptake rate of the algae-bacteria consortia was still high, maintaining above 0.815 µg•g −1 •h −1 .…”

Section: Illumination On Nitrite Nitrogen Uptake By the Microalgae-ba...supporting

confidence: 90%

Effect of Environmental Factors on Nitrite Nitrogen Absorption in Microalgae–Bacteria Consortia of Oocystis borgei and Rhodopseudomonas palustris

Luo

Zhong

et al. 2023

Water

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The effects of temperature, salinity, and illumination on the nitrite uptake rate of the microalgae–bacteria consortia of Oocystis borgei and Rhodopseudomonas palustris were investigated. The absorption rates of nitrite and the contribution rate of each component in the consortia under different temperatures (15, 20, 25, 30, 35 °C), illuminations (0, 15, 25, 35, 45 μmol·m−2·s−1), and salinities (0, 5, 15, 25, 35‰) were determined by stable isotope labeling technique. The single and combined effects of three environmental factors on nitrite uptake by the microalgae–bacteria consortia were analyzed using single-factor and orthogonal experiments. The single-factor experiment showed that the microalgae–bacteria consortia could absorb nitrite efficiently when the temperature, salinity, and illumination were 20~30 °C, 0~15‰, and 25~45 μmol·m−2·s−1, respectively, with the highest absorption rates were 2.086, 3.058, and 2.319 μg∙g−1∙h−1, respectively. The orthogonal experiment showed that the most efficient environmental conditions for nitrite uptake were 30 °C, 5‰ salinity, 35 μmol·m−2·s−1 illumination, and the rate of nitrite uptake by the microalgae–bacteria consortia was 3.204 μg∙g−1∙h−1. The results showed that the nitrite uptake rate of the O. borgei–R. palustris consortia was most affected by temperature, followed by salinity, and least by illumination. Under the same conditions, the nitrite absorption capacity of the microalgae–bacteria consortia was greater than that of single bacteria or algae, and R. palustris played a major role in the nitrite absorption of the consortia. The O. borgei and R. palustris consortia still maintain high nitrite absorption efficiency when the environment changes greatly, which has broad application prospects in the regulation and improvement of water quality in shrimp culture.

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Section: Illumination On Nitrite Nitrogen Uptake By the Microalgae-ba...supporting

confidence: 90%

Effect of Environmental Factors on Nitrite Nitrogen Absorption in Microalgae–Bacteria Consortia of Oocystis borgei and Rhodopseudomonas palustris

Luo

Zhong

et al. 2023

Water

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“…Nevertheless, macroalgae has been proved to remove organic chemicals by degradation and not just by bioadsorption (Khataee et al 2013). Amiri and Ahmadi (2020) showed that addition of glucose facilitated in higher COD removal from wastewater using macroalgae Spirogyra sp. than without the glucose supplement.…”

Section: Resultsmentioning

confidence: 99%

“…used for wastewater treatment are Ulva sp., Chaetomorpha sp., Oedogonium sp., Chlorophyta sp., Spirogyra sp., and Kelp sp. Macroalgae have also been shown to remove COD and BOD from several wastewaters such as municipal (Amiri and Ahmadi 2020), textile (Yaseen and Scholz 2019), piggery effluent (Nwoba et al 2017), shrimp farm waste (Santhi and Deivasigamani 2017), palm mill oil effluent (Kamyab et al 2015), and sewage (Ashokkumar et al 2019). Macroalgae have been reported to remove heavy metals due to their higher biosorption capacities; metals such as nickel, cadmium, copper, and zinc were removed by significantly synergistic action of macro-and microalgae consortium (Piccinni et al 2019).…”

Section: Emergingmentioning

confidence: 99%

Carbon dissipation from surgical cotton production wastewater using macroalgae, microalgae, and activated sludge microbes

Babu

Sharma

Matheswaran

2021

Environ Sci Pollut Res

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Surgical cotton production has drastically been increased in the past few years due to excessive use by medical health professionals especially in countries like India, which is among the top three exporters of cotton worldwide. The effluent generated from surgical cotton industries differ from textile effluents by the conspicuous absence of dyeing chemicals. This wastewater has a high concentration of suspended particles, COD, dissolved ions, organic carbon, and alkaline pH. Several studies have been published on the treatment of textile effluents and the degradation of dyeing chemicals, while the treatment studies on surgical cotton wastewater have been rarely reported in spite of their potential to cause pollution in receiving land/water bodies. Activated sludge microbes have been extensively studied and well documented in the treatment of several industrial effluent but does not match to the production of valuable biomass from algae. The global energy demand has prompted the scientific community to investigate and explore the possibility of using algae for energy production with simultaneous wastewater treatment. To the best of the authors' knowledge, no research articles have been published which compare the effectiveness of activated sludge microorganisms, microalgae, and macroalgae in removing contaminants from real wastewater. To date, there is a knowledge gap in understanding and selecting the right choice of biological system for effective and economical effluent treatment. In an attempt to minimize this gap, carbon removal by microalgae, macroalgae, and activated sludge microbes were investigated on real effluent from surgical cotton industries. It was observed that the strain of Chlorella vulgaris could dissipate 83% of COD from real wastewater, while consortia of macroalgae (consisting predominantly of Ulvaceae and Chaetomorpha) and activated sludge microbes could remove 81% and 69% of the carbon, respectively. The microalgal growth (in terms of wet weight) increased from 0.15 to 0.3 g, whereas the macroalgal wet weight increased from 1.5 to 3 g in over 7 days of batch experiments conducted in triplicates. This indicated the superlative performance of microalgae over activated sludge microbes in carbon dissipation. KeywordsSurgical cotton wastewater • Chlorella vulgaris • Ulva lactuca and Chaetomorpha • Activated sludge microbes • Microalgae and macroalgae

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“…While using this technology, the production cost can be effectively reduced to €0.70 or €0.68 per kilogramme (Negi et al 2020, Oostlander et al 2020. Arable land and high-quality irrigation are not recommended, the utilization of saltaffected or marginal land, including desert regions, along with saline or wastewater, remains a viable option and it could be used if suitable strains of algae are available (Amiri and Ahmadi 2020).…”

Section: Resultsmentioning

confidence: 99%

Evaluating optimal cultivation sites for microalgae as a sustainable biofuel energy resource

Arsalan,

Iqbal

2023

Environ. Res. Commun.

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Microalgae are promising candidates for the production of sustainable biofuels due to their high productivity, ability to grow in diverse environments, and carbon capture potential. However, the selection of suitable cultivation sites is crucial to achieve efficient and sustainable microalgae cultivation for biofuel production. This study discusses the evaluation of optimal cultivation sites for microalgae as a sustainable biofuel energy resource, with a focus on the naturally favorable conditions for microalgae cultivation in Gwadar, Pakistan. The global demand for renewable energy sources has increased due to the rising energy crisis, and microalgae has emerged as an efficient source of biofuel on a large scale. The study utilizes geographic information systems to highlight suitable microalgae cultivation areas in Gwadar. The results indicate that Gwadar has the potential to overcome the energy crisis by cultivating microalgae as a biofuel energy source. The research provides a promising idea for designing a master plan to install a microalgae cultivation system in the highlighted sites for the concerned authorities.

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Treatment of wastewater in sewer by Spirogyra sp. green algae: effects of light and carbon sources

Cited by 15 publications

References 22 publications

Effect of Environmental Factors on Nitrite Nitrogen Absorption in Microalgae–Bacteria Consortia of Oocystis borgei and Rhodopseudomonas palustris

Effect of Environmental Factors on Nitrite Nitrogen Absorption in Microalgae–Bacteria Consortia of Oocystis borgei and Rhodopseudomonas palustris

Carbon dissipation from surgical cotton production wastewater using macroalgae, microalgae, and activated sludge microbes

Evaluating optimal cultivation sites for microalgae as a sustainable biofuel energy resource

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