A rapid method for fungal assisted algal flocculation: Critical parameters &amp; mechanism insights

Bhattacharya, Arghya; Mathur, Megha; Kumar, Pushpendar; Prajapati, Sanjeev Kumar; Malik, Anushree

doi:10.1016/j.algal.2016.10.022

Cited by 95 publications

(33 citation statements)

References 51 publications

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“…These harvesting methods may account for as much as 20–30% of the total algal biomass production costs and are also very energy-demanding (Uduman et al 2010 ). Recent research has indicated the potential for using filamentous fungi to form pellets with microalgae (biopellets) in order to advance the sustainability and economic feasibility of producing and harvesting microalgal biomass in wastewater (Zhang and Hu 2012 ; Bhattacharya et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…The use of filamentous fungi for harvesting microalgae, through formation of biopellets, is currently being intensely researched (Bhattacharya et al 2017 ) and has high potential for being developed into a sustainable technology. The aim of the present study was to investigate the effect of this harvesting process on pesticide removal from contaminated water.…”

Section: Introductionmentioning

confidence: 99%

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Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Hultberg

Bodin

2018

Biodegradation

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Recent research has demonstrated the potential of using filamentous fungi to form pellets with microalgae (biopellets), in order to facilitate harvesting of microalgae from water following algae-based treatment of wastewater. In parallel, there is a need to develop techniques for removing organic pollutants such as pesticides and pharmaceuticals from wastewater. In experiments using the microalga Chlorella vulgaris, the filamentous fungus Aspergillus niger and biopellets composed of these microorganisms, this study investigated whether fungal-assisted algal harvesting can also remove pesticides from contaminated water. A mixture of 38 pesticides was tested and the concentrations of 17 of these were found to be reduced significantly in the biopellet treatment, compared with the control. After harvesting, the concentration of total pesticides in the algal treatment did not differ significantly from that in the control. However, in the fungal treatment and biopellet treatment, the concentration was significantly lower (59.6 ± 2.0 µg/L and 56.1 ± 2.8 µg/L, respectively) than in the control (66.6 ± 1.0 µg/L). Thus fungal-assisted algal harvesting through biopellet formation can also provide scope for removing organic pollutants from wastewater, with removal mainly being performed by the fungus.Electronic supplementary materialThe online version of this article (10.1007/s10532-018-9852-y) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Hultberg

Bodin

2018

Biodegradation

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“…11 Furthermore, lamentous fungi had a strong occulation effect on microalgae due to their large surface area and easy solid-liquid separation, which was convenient for the recycling of microalgae. 12 Ndikubwimana et al reported a yield of 95% for microalgae with the formation of cell pellets, 13 and Prajapati et al found A. lentulus resulting in 98% harvesting at low glucose level (5.0 g L À1 ) within 52 h. 14 In terms of economic costs, effective wastewater treatment performance and the good sources of biofuels, the co-culture system of fungi and microalgae had great potential in wastewater treatment. Generally both fungi and microalgae could decolorize dyes by the adsorption or degradation.…”

Section: Introductionmentioning

confidence: 99%

Decolorization and degradation analysis of Disperse Red 3B by a consortium of the fungus Aspergillus sp. XJ-2 and the microalgae Chlorella sorokiniana XJK

Tang

et al. 2019

RSC Adv.

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Disperse Red 3B, an anthraquinone dye, was decolorized by a consortium, which was constituted of the fungus (Aspergillus sp. XJ-2) and the microalgae (Chlorella sorokiniana XJK). The consortium performed better than the single system in terms of decolorization and nutrient removal simultaneously in the simulated wastewater of Dispersed Red 3B. The decolorization rate could reach 98.09% by the consortium under the optimized conditions. The removal rate of COD (Chemical Oxygen Demand), TP (Total Phosphorus), and ammonia nitrogen reached 93.9%, 83.9% and 87.6%. Also, the consortium could tolerate higher salt and dye concentration than the single system did. In this co-cultural system, the lignin peroxidase and manganese peroxidase enzyme activities contributed to the degradation of Disperse Red 3B, which reached 86.7 U L À1 and 122.5 U L À1 . The result of fermentation liquid analysis with UV-vis, FTIR and GC-MS showed that the colored functional group of the dye was broken and the Dispersed Red 3B was degraded into small molecular compounds with low toxicity. It was suggested that degradation plays a major role during the color removal process. The consortium exhibited greater potential in terms of color removal and water pollutant removal than the separate system did.

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“…During the pelletisation process, the microalgal cells become entrapped inside the fungal pellets and can then be removed from the wastewater by coarse filtration. Thus, the fungal-assisted algal harvesting technique may lessen the costs associated with production of microalgal biomass in wastewater and associated biofuel production [4] [5].…”

Section: Introductionmentioning

confidence: 99%

“…Use of filamentous fungi for microalgae harvesting, through the formation of biopellets, is now an intensely researched area [5], due to its potential for development into a sustainable wastewater treatment technology. The aim of the present study was to increase knowledge of fungal-assisted algal harvesting from wastewater and to investigate its effect in reducing the concentrations in water of nutrients and the micropollutant diclofenac, which is included in the EU watch-Journal of Water Resource and Protection list of priority substances [13].…”

Section: Introductionmentioning

confidence: 99%

Impact on Wastewater Quality of Biopellets Composed of <i>Chlorella vulgaris</i> and <i>Aspergillus niger</i> and Lipid Content in the Harvested Biomass

Hultberg¹,

Bodin²,

Birgersson³

2019

JWARP

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Filamentous fungi can be used to form easily harvested pellets with microalgae (fungal-assisted algal harvesting) in order to advance the sustainability and economic feasibility of wastewater treatment using microalgae. In experiments employing the microalga Chlorella vulgaris and using the filamentous fungus Aspergillus niger for harvesting, this study investigated the effect on water quality and the quantity and quality of lipids in the biomass produced. Major reductions in the concentrations of total nitrogen, ammonium-nitrogen and total phosphorus were observed after addition of the fungal spores (day 5) and during fungal growth and entrapment of the algal cells. At harvest (day 8), the decrease in total nitrogen was 47.4% ± 18.4% of the initial value, corresponding to a reduction of 41.9 ± 17.1 mg•nitrogen•L −1. For total phosphorus, the decrease was 94.4% ± 3.2%, corresponding to a reduction of 6.4 ± 0.2 mg•phosphorus•L −1. A significant decrease in concentration of the micropollutant diclofenac was observed at harvest, to 5.1 ± 4.0 µg•L −1 compared with an initial concentration of 9.5 ± 0.6 µg•L −1. A significant decrease in total lipids in the biomass was observed after fungal-assisted algal harvesting, from 58.7 ± 2.7 µg•mg −1 at day 5 (algal biomass only) to 34.2 ± 2.7 µg•mg −1 at day 8 (fungal-algal biomass). However, because of high biomass production, the amount of lipids produced per litre of wastewater increased from 5.6 ± 0.9 mg on day 5 to 20.6 ± 4.9 mg on day 8.

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A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights

Cited by 95 publications

References 51 publications

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Decolorization and degradation analysis of Disperse Red 3B by a consortium of the fungus Aspergillus sp. XJ-2 and the microalgae Chlorella sorokiniana XJK

Impact on Wastewater Quality of Biopellets Composed of <i>Chlorella vulgaris</i> and <i>Aspergillus niger</i> and Lipid Content in the Harvested Biomass

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A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights

Cited by 95 publications

References 51 publications

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water

Decolorization and degradation analysis of Disperse Red 3B by a consortium of the fungus Aspergillus sp. XJ-2 and the microalgae Chlorella sorokiniana XJK

Impact on Wastewater Quality of Biopellets Composed of &lt;i&gt;Chlorella vulgaris&lt;/i&gt; and &lt;i&gt;Aspergillus niger&lt;/i&gt; and Lipid Content in the Harvested Biomass

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Impact on Wastewater Quality of Biopellets Composed of <i>Chlorella vulgaris</i> and <i>Aspergillus niger</i> and Lipid Content in the Harvested Biomass