Click here for more information about Algenuity
Click here for more information about LiqofluxPhenometrics Buy 3 Get 1 Free
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…

Copyright ©2010-2020 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
Tavelmout Biofarm (TVMB), a Bruneian subsidiary of Tabérumo Corporation — a pioneer in the large-scale cultivation of spirulina using photobioreactors — has launched thei...
Milenio.com reports that BiomiTech, a Mexican company, won a prestigious innovation award for its air purification system at the Contamination Expo Series 2018 held in Bi...
When there is a combination of population increase, wastewater discharge, agricultural fertilization, and climate change, the cocktail is detrimental to humans and animal...
New Food Magazine reports that a new Danish project called “Microalgae for Food” has received DKK 750,000 (approximately $110,000US) in co-financing from the Ministry of ...
Algae and corals have been leaning on each other since dinosaurs roamed the earth, much longer than had been previously thought, according to new research led by scientis...
Reebok has introduced a plant-based shoe that is in class with the best performance running sneakers on the market. The Forever Floatride GROW is the latest example of Re...
Gerard de Souza reports for the Hindustan Times that researchers at the CSIR-National Institute of Oceanography Goa (India) have found a cleaner, cheaper method to grow b...
Cyanotech Corporation, a Kailua Kona, Hawaii-based leader in high-value nutrition and health products made from algae, has announced financial results for the first quart...
How did plants make the evolutionary jump from water to land? Scientists think that green algae are their water-living ancestors, but we are not sure how the transition t...
Trade Arabia reports that the Oman Centre for Marine Biotechnology (OCMB) recently signed a memorandum of understanding with Swedish Algae Factory to support the domestic...
Jason Huffman writes in UndercurrentNews.com that the Kampachi Company, a mariculture business focused on expanding the environmentally sound production of sashimi-grade ...
Kim Kaplan reports for the U.S. Department of Agriculture’s Agricultural Research Service, in Baton Rouge, Louisiana, that a microscopic algae could provide a complete an...