NDLI: A comparative study of the coagulation behaviour of marine microalgae

Content Provider	Springer Nature Link
Author	Eldridge, R. J. Hill, D. R. A. Gladman, B. R.
Copyright Year	2012
Abstract	Coagulation is an important step in the harvesting of algal biomass. This paper presents experimental results for a variety of prospective marine microalgal species using several inorganic and organic coagulants. Tetraselmis suecica and Chlorococcum sp. are readily coagulated using alum or iron(III) sulphate without any pH adjustment; doses of 3–5 mg L$^{−1}$ or 0.2 mmol m$^{−2}$ of Al$^{3+}$ or Fe$^{3+}$ yielding cell recoveries above 90 % after only 5-min settling. Nannochloropsis salina, Dunaliella tertiolecta and Isochrysis galbana are harder to coagulate and require at least two times more coagulant to achieve similar recoveries. Several cationic polyacrylamides were investigated but were less effective than Al$^{3+}$ or Fe$^{3+}$. Addition of NaOH to control pH improved the coagulation efficiency of N. salina but not of D. tertiolecta. The high coagulant demand of N. salina is due in part to its small size and large surface area, while that of D. tertiolecta may be attributable to its high production of extracellular polymer. The implications of cell surface properties for coagulation efficiency are discussed. At the coagulant doses used herein, settled cells remain viable. Resuspension is a potential problem with some species, arising either from cell motility or from flotation of flocs by oxygen bubbles generated by photosynthesis. These effects can be eliminated by small additions of chlorine or by settling the algae in the dark.
Starting Page	1667
Ending Page	1679
Page Count	13
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	24
Issue Number	6
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-04-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microalgae Dewatering Harvesting Coagulation Flocculation Biofuels Ecology Plant Sciences Plant Physiology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Harvesting of microalgae by bio-flocculation

Harvesting of freshwater and marine microalgae by common flocculants and magnetic microparticles

Comparative evaluation of inorganic and organic amendments for their flocculation efficiency of selected microalgae

Harvesting the microalgae Phaeodactylum tricornutum with polyaluminum chloride, aluminium sulphate, chitosan and alkalinity-induced flocculation

Flocculation of microalgae using cationic starch

Harvesting Chlorella minutissima using cell coagulants

Oil production by six microalgae: impact of flocculants and drying on oil recovery from the biomass

Selection of optimal flocculant for effective harvesting of the fucoxanthin-rich marine microalga Isochrysis galbana

Microalgae autoflocculation: an alternative to high-energy consuming harvesting methods

A comparative study of the coagulation behaviour of marine microalgae

Similar Documents

Harvesting of microalgae by bio-flocculation

Harvesting of freshwater and marine microalgae by common flocculants and magnetic microparticles

Comparative evaluation of inorganic and organic amendments for their flocculation efficiency of selected microalgae

Harvesting the microalgae Phaeodactylum tricornutum with polyaluminum chloride, aluminium sulphate, chitosan and alkalinity-induced flocculation

Flocculation of microalgae using cationic starch

Harvesting Chlorella minutissima using cell coagulants

Oil production by six microalgae: impact of flocculants and drying on oil recovery from the biomass

Selection of optimal flocculant for effective harvesting of the fucoxanthin-rich marine microalga Isochrysis galbana

Microalgae autoflocculation: an alternative to high-energy consuming harvesting methods

A comparative study of the coagulation behaviour of marine microalgae