Click here for more information about Algenuity
Click here for more information about Liqofluxphenometrics515R1
Visit cricatalyst.com!Evodos Separation Technology

Innovations

Lake restoration using microalgal technology

February 19, 2017
AlgaeIndustryMagazine.com

(L) Lake near Aligarh, India, heavily polluted before start of restoration work. (R) Same lake two weeks after starting restoration work. The boy is spraying Phycoplus.

Ponds, lakes and other waster bodies are getting polluted through discharges from agricultural run-off, sewage discharge, industrial effluents etc. Due to excessive loading of chemicals and nutrients (eutrophication) sudden blooming of hazardous algae – mostly blue green algae – occurs, eliminating other species of algae which usually form a part of the natural food chain.

Duckweeds or other floating vegetation are also common, cutting off light which results in anaerobic conditions developing in the lower layers, leading to destruction of ecosystems. Water becomes turbid and foul smelling and very high Biochemical oxygen demand (BOD) and chemical oxygen demand (COD) associated with huge populations of coliform bacteria. Restoring these wasted water bodies is a major challenge, and our company, PERC, has recently taken up this challenge and developed a microalgae-based product.

Phycospectrum Environmental Research Centre (PERC), Chennai, has been involved in developing and implementation of microalgae-based treatment technologies for handling industrial effluents in India and abroad. pH correction, color removal, odor removal, COD and BOD reduction, and sludge reduction have been successfully implemented by PERC algal technology.

Recently microalgae technology has been found to be suitable for handling reverse osmosis (R/O) rejects from desalination plants, leather industries, textile industries, etc. replacing the more expensive and energy intensive multiple effect evaporators (MEEs). Integration of pulsed magnetic field (PMF) technology, jointly developed by PERC in collaboration with Madras Institute of Magnetobiology, Chennai, has been very effective in enhancing the efficiency of algae-based remediation systems.

PERC has selected a few robust and natural microalgae and customized micronutrients to support them and converted them into a product, Phycoplus. If administered, the treatment results in breaking of the dominance of the polluting algae and stripping off essential nutrients for the duckweeds to make them disappear.

Phycoplus microalgae colonizing results in significant reduction in coliform bacteria, BOD and COD. Water becomes transparent and foul odor is gone.

Parameters of lake water before and after restoration. (Tests done after four weeks show further reduction in these parameters).

This technology has been recently demonstrated by PERC in a village lake near Aligarh, Northern India. This lake received discharge from households of the village and agricultural run-off which contain huge amounts of nutrients and organic loads polluting the lake completely. The lake was covered with floating cyanobacterial mats and duck weeds which prevented light penetration. Water had a foul odor and color was blackish – and the village people almost abandoned this lake.

After PERC’s restoration work the lake water became transparent, COD and BOD reduced to a minimum and there was a significant reduction of coliform bacteria. Floating cyanobacterial mats and duckweeds vanished. Periodic addition of Phycoplus helped maintain the lake from further eutrophication and fouling.

PERC is researching in more ponds, lakes and small drains to test this algal technology further before taking up larger projects in India and elsewhere.

Dr. V Sivasubramanian is the Director of Phycospectrum Environmental Research Centre (PERC), Chennai 600040, India. Email: vsivasubramanian@gmail.com

More Like This…

HOME A.I.M. Archives

Copyright ©2010-2018 AlgaeIndustryMagazine.com. All rights reserved. Permission required to reprint this article in its entirety. Must include copyright statement and live hyperlinks. Contact editorial@algaeindustrymagazine.com. A.I.M. accepts unsolicited manuscripts for consideration, and takes no responsibility for the validity of claims made in submitted editorial.

twittertopbarlinks_eventstopbarlinks_requesttopbarlinks_archives

From The A.I.M. Archives

— Refresh Page for More Choices
Carl Zimmer writes in The New York Times about a team of Australian scientists studying how climate change will alter ecosystems – by using miniature ecosystems, called m...
David Erickson writes in the (Montana) Missoulian that Clearas Water Recovery, a Missoula tech company formed eight years ago, has developed a patented process to use alg...
The U.S. Department of Energy (DOE) has announced the selection of three projects to receive up to $8 million, aimed at reducing the costs of producing algal biofuels and...
Carlsbad-based Surftech, a stand-up paddle (SUP) and Surfboard manufacturing company has announced its collaboration with BLOOM, a materials development company, to devel...
A Bay Area company has patented a group of three single-celled, algae-like organisms that, when grown together, can produce high quantities of sugar just right for making...
Portuguese microalgae producer, Allmicroalgae Natural Products S.A., has recently begun production of Chlorella vulgaris and other microalgae species via fermentation, wh...
Jeff Gelsky writes in Meat+Poultry that Corbion executives have given insights on how its September 29 acquisition of TerraVia Holdings Inc., an algae-based ingredients c...
Ali Morris writes in dezeen.com that Dutch designers Eric Klarenbeek and Maartje Dros have developed a bioplastic made from algae, which they believe could completely rep...
Watertechonline.com reports that the All-Gas project in the El Torno treatment plant in Chiclana, in southwestern Spain, in the province of Cádiz, has started its demonst...
The Utah Science Technology and Research (USTAR) initiative, a technology-based economic development program funded by the state of Utah, has awarded a $175,320 grant for...
The recently signed US two-year budget deal – featuring bipartisan support for a $35 per ton tax incentive for carbon captured and recycled from power plants or industria...
42 Technology has been appointed by LabXero, acoustic particle filtration technology company, to help develop pilot-scale biomanufacturing equipment that could significan...