Experimental studies on zeta potential of flocculants for harvesting of algae

Arya Pandey; Vinayak V. Pathak; Richa Kothari; Paul N. Black; V. V. Tyagi

doi:10.1016/j.jenvman.2018.09.096

Experimental studies on zeta potential of flocculants for harvesting of algae

Arya Pandey, Vinayak V. Pathak, Richa Kothari, Paul N. Black, V. V. Tyagi

Biochemistry

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65 Scopus citations

Abstract

An experimental study was performed to evaluate the comparative efficiency of bio-flocculant (waste egg shell), laboratory available calcium carbonate (LACC) and alum (Al₂ (SO₄)₃) for harvesting of unicellular microalga, Chlorella pyrenoidosa. The influence of pH on zeta potential (ζ) was also studied to explain the chemistry of flocculation process. The maximum harvesting efficiency (99%) was obtained with alum with deformities in algal cell surfaces. Waste egg-shell material is developed as a low-cost bio-flocculant for harvesting of Chlorella pyrenoidosa using 100 mg egg-shell bio-flocculant/L and 100 mg LACC/L, zeta potential analysis was completed to further understand the chemistry of harvesting efficiency over the different ranges of pH (2.0, 4.0, 6.0, 8.0, and 10.0). The optimized range for harvesting efficiency (HE) of pH is 4.0–8.0 for both flocculants. Maximal harvesting efficiency was achieved at pH 4.0 (99%) and pH 8.0 (95%) with bio-flocculant and LACC respectively. Hence, bio-flocculant based harvesting method is found as the best way to dewatering the algal biomass from aqueous medium with entire and intact algal cell surface with environment friendly and cost-effective approach.

Original language	English (US)
Pages (from-to)	562-569
Number of pages	8
Journal	Journal of Environmental Management
Volume	231
DOIs	https://doi.org/10.1016/j.jenvman.2018.09.096
State	Published - Feb 1 2019

Keywords

Algal biomass
Bio-flocculant
Harvesting efficiency
Health risks
Zeta potential

ASJC Scopus subject areas

Environmental Engineering
Waste Management and Disposal
Management, Monitoring, Policy and Law

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10.1016/j.jenvman.2018.09.096

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@article{da3023d04e1f441d87dcaeea6dd765af,

title = "Experimental studies on zeta potential of flocculants for harvesting of algae",

abstract = "An experimental study was performed to evaluate the comparative efficiency of bio-flocculant (waste egg shell), laboratory available calcium carbonate (LACC) and alum (Al2 (SO4)3) for harvesting of unicellular microalga, Chlorella pyrenoidosa. The influence of pH on zeta potential (ζ) was also studied to explain the chemistry of flocculation process. The maximum harvesting efficiency (99%) was obtained with alum with deformities in algal cell surfaces. Waste egg-shell material is developed as a low-cost bio-flocculant for harvesting of Chlorella pyrenoidosa using 100 mg egg-shell bio-flocculant/L and 100 mg LACC/L, zeta potential analysis was completed to further understand the chemistry of harvesting efficiency over the different ranges of pH (2.0, 4.0, 6.0, 8.0, and 10.0). The optimized range for harvesting efficiency (HE) of pH is 4.0–8.0 for both flocculants. Maximal harvesting efficiency was achieved at pH 4.0 (99%) and pH 8.0 (95%) with bio-flocculant and LACC respectively. Hence, bio-flocculant based harvesting method is found as the best way to dewatering the algal biomass from aqueous medium with entire and intact algal cell surface with environment friendly and cost-effective approach.",

keywords = "Algal biomass, Bio-flocculant, Harvesting efficiency, Health risks, Zeta potential",

author = "Arya Pandey and Pathak, {Vinayak V.} and Richa Kothari and Black, {Paul N.} and Tyagi, {V. V.}",

note = "Funding Information: This work was done in co-ordination with Department of Environmental Science, Department of Environmental Microbiology, University Science Instrumentation Centre (USIC) at Babasaheb Bhimrao Ambedkar University, Lucknow, U.P., India. We are thankful to Water Advanced Research and Innovation Fellowship (WARI) program of Indo-US Science and Technology Forum, India and Department of Biochemistry, Beadle Centre, University of Nebraska-Lincoln, Nebraska, USA for necessary facilities. Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

month = feb,

day = "1",

doi = "10.1016/j.jenvman.2018.09.096",

language = "English (US)",

volume = "231",

pages = "562--569",

journal = "Journal of Environmental Management",

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AU - Pandey, Arya

AU - Pathak, Vinayak V.

AU - Kothari, Richa

AU - Black, Paul N.

AU - Tyagi, V. V.

N1 - Funding Information: This work was done in co-ordination with Department of Environmental Science, Department of Environmental Microbiology, University Science Instrumentation Centre (USIC) at Babasaheb Bhimrao Ambedkar University, Lucknow, U.P., India. We are thankful to Water Advanced Research and Innovation Fellowship (WARI) program of Indo-US Science and Technology Forum, India and Department of Biochemistry, Beadle Centre, University of Nebraska-Lincoln, Nebraska, USA for necessary facilities. Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/2/1

Y1 - 2019/2/1

N2 - An experimental study was performed to evaluate the comparative efficiency of bio-flocculant (waste egg shell), laboratory available calcium carbonate (LACC) and alum (Al2 (SO4)3) for harvesting of unicellular microalga, Chlorella pyrenoidosa. The influence of pH on zeta potential (ζ) was also studied to explain the chemistry of flocculation process. The maximum harvesting efficiency (99%) was obtained with alum with deformities in algal cell surfaces. Waste egg-shell material is developed as a low-cost bio-flocculant for harvesting of Chlorella pyrenoidosa using 100 mg egg-shell bio-flocculant/L and 100 mg LACC/L, zeta potential analysis was completed to further understand the chemistry of harvesting efficiency over the different ranges of pH (2.0, 4.0, 6.0, 8.0, and 10.0). The optimized range for harvesting efficiency (HE) of pH is 4.0–8.0 for both flocculants. Maximal harvesting efficiency was achieved at pH 4.0 (99%) and pH 8.0 (95%) with bio-flocculant and LACC respectively. Hence, bio-flocculant based harvesting method is found as the best way to dewatering the algal biomass from aqueous medium with entire and intact algal cell surface with environment friendly and cost-effective approach.

AB - An experimental study was performed to evaluate the comparative efficiency of bio-flocculant (waste egg shell), laboratory available calcium carbonate (LACC) and alum (Al2 (SO4)3) for harvesting of unicellular microalga, Chlorella pyrenoidosa. The influence of pH on zeta potential (ζ) was also studied to explain the chemistry of flocculation process. The maximum harvesting efficiency (99%) was obtained with alum with deformities in algal cell surfaces. Waste egg-shell material is developed as a low-cost bio-flocculant for harvesting of Chlorella pyrenoidosa using 100 mg egg-shell bio-flocculant/L and 100 mg LACC/L, zeta potential analysis was completed to further understand the chemistry of harvesting efficiency over the different ranges of pH (2.0, 4.0, 6.0, 8.0, and 10.0). The optimized range for harvesting efficiency (HE) of pH is 4.0–8.0 for both flocculants. Maximal harvesting efficiency was achieved at pH 4.0 (99%) and pH 8.0 (95%) with bio-flocculant and LACC respectively. Hence, bio-flocculant based harvesting method is found as the best way to dewatering the algal biomass from aqueous medium with entire and intact algal cell surface with environment friendly and cost-effective approach.

KW - Algal biomass

KW - Bio-flocculant

KW - Harvesting efficiency

KW - Health risks

KW - Zeta potential

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DO - 10.1016/j.jenvman.2018.09.096

M3 - Article

C2 - 30388653

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SN - 0301-4797

VL - 231

SP - 562

EP - 569

JO - Journal of Environmental Management

JF - Journal of Environmental Management

ER -

Experimental studies on zeta potential of flocculants for harvesting of algae

Abstract

Keywords

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