Oilgae Club - an Online Community for Algae Fuel Enthusiasts Worldwide.

Sindhuja's Blog

Originoil's Electro Water Separation

Originoil, has recently claimed that the company has deveoped a breakthrough algae harvesting process - Electro Water Seperation (EXS). This process is said to rapidly and efficiently remove organic material from large quantities of water without the need for chemicals. EWS works in two parts: Electro- Coagulation and Electro -Floatation

Contaminated water enters the first stage, Electro-Coagulation (EC). In this stage, electrical impulses are applied in long tubes, causing the organic contaminants to coagulate, or “clump” together. ( In 2009, OriginOil branded this stage Single-Step Extraction). This process was earlier field tested and proven successful.



Later , the company found that the coagulated material could be floated to the surface by electrically inducing a cloud of small bubbles , which can be then raked off.

Originoil claims that this two-stage process is an energy-efficient, continuous system that advanced testing has shown can achieve up to a 99.9% reduction in free oil and a 99.5% reduction in suspended solids, without requiring large quantities of chemicals.

Inaddition, the process has also showed extraordinary anti-bacterial effectiveness and could increase the shelf life of algae at high temperatures, thus allowing producers more time to process biomass into useful algae products, with increased quality and reduced product loss.
Mon July 22 2013 12:21:58 PM by Sindhuja algae harvesting  |  electro water separation  |  OriginOil

Algae Harvesting using Dissolved Air Floatation

One of the biggest problem in algae biofuels commercialization lies in the process of algae harvesting. This post features a technology which has been used by the University of California. The San Diego Center for Algal Biotechnology (SD-CAB) , of the University of California, has been doing algae biofuel research since 2008, together with the Scripps Institution of Oceanography.

The research colloboration has utilized a harvest system which processes up to 9000 gallons of algae-laden water per minute at a 95% capture rate, yielding up to 20% algae concentrations. The algae harvesting technology is being brought by a company called World Water Works which uses optimized dissolved air flotation system to harvest the algae from water.

How the technology works?

Pond water is pumped into the DAF where suspended solids in the form of algae are separated from the water by a process of dissolving air into the water under pressure, with the addition of a polyacrylamide flocculent. Upon release of that pressure, microbubbles form. These microbubbles interact with the algae particles, attaching to the biomass surface and affecting the particle density, causing them to float to the surface of the DAF. They are then skimmed with a chain and flight mechanism to a sieved Thickening Beach (trademarked). The Thickening Beach allows free water to be drained and thickens the algae particles, achieving an efficient liquids and biomass separation.

Patented Nikuni air dissolving technology is used to create the robust whitewater in the AHTO system, which saturates the effluent pond water entering the DAF with atmospheric air.

Heavy sand and grit particles settle to the bottom, where a timer function controls the removal. The clean water is continuously removed from the DAF and piped back into the ponds, allowing new pond water laden with algae to enter for separation.

Source: http://ese.dgtlpub.com/2013/2013-02-28/pdf/Dissolved_air_flotation_process_harvests_algae_for_biodiesel_research.pdf

Mon July 22 2013 07:00:34 AM by Sindhuja Dissolved Air Floatation  |  DAF  |  algae harvesting

Iowa Researchers Use Ultrasonics for Improved Biofuel Production

David Grewell, associate professor of agricultural and biosystems engineering and Center for Crops Utilization Research (CCUR) and BioCentury Research Farm affiliate, and his research team are using ultrasound to enhance chemical reactions of biomass from a raw feedstock to high-value fuels and chemicals. Grewell evaluated the use of ultrasonics to pretreat corn in preparation for fermentation. In a conventional dry-grind corn ethanol plant, ground corn is steamed in jet cookers, and with the addition of enzymes, the starch is converted to glucose for fermentation. In Grewell’s method, the ultrasonics break down corn into very small particles, giving the enzymes more surface to convert the starch into sugars that serve as food for the yeast. Their experiments have shown that when corn was pretreated with ultrasound waves, fermentation yields were comparable to jet cooking.


Grewell’s latest research is focused on using ultrasonics to process lignocellulosic biomass for ethanol production.


Apart from the above applications, Grewell also investigates the use of  ultrasonic waves  for welding plastics, to improve or create biobased plastics and composites and to enhance the release of oils from these microbes for processing into biodiesel. Source:http://bit.ly/15AZtGl

Thu June 27 2013 12:04:47 PM by Sindhuja Ultrasonics  |  Sound Waves  |  Iowa State University

Bacteria helps Algae, Algae helps bacteria

Aquanos’ technology ,an Israel-based company involved in waste water purification, uses the symbiotic relationship between bacteria and algae  in its treatment process. Bacteria supplies carbon dioxide to the algae, algae provides oxygen to the bacteria, and both remove impurities from wastewater. This natural process is said to reduce a wastewater treatment system’s operational costs by 40-60% and significantly reduces capital expenditures.


Read about the company's recent business deal here -http://bit.ly/1bzoDGQ

Wed June 26 2013 06:32:41 AM by Sindhuja Symbiosis  |  Aquanos  |  Algae waste water treatment

"Marine Phytoplankton Most Important Plant In the World " says NASA

According to NASA and other scientists, marine phytoplankton could be the most important plant in the world as it provides the earth with over 90% of it’s oxygen. Marine phytoplankton  is  a critical food source for ocean life and apparently plays a significant role in human and animal nutrition. Some health practitioners believe that if everyone started taking just one teaspoon of marine phytoplankton per day we would start seeing the elimination of degenerative diseases, healing of cancer and the nourishment of the planet.


Read more about the exciting phytoplankton from here - http://bit.ly/17wuJLz

Tue June 25 2013 11:59:45 AM by Sindhuja Algae Product  |  Algae as feed

Spirulina - Grow It Yourself Kit

Spirulina is an excellent source of protein ,containing every essential amino acid to build healthy muscle and tissue. Spirulina has been used as food for centuries by different populations and only rediscovered in recent years. Some of the companies that cultivate spirulina in a large scale are Parrys Nutraceuticals - India, Cyanotech, Hawaii - USA, Hydrolina Biotech - India, Nutrex Hawaii - USA, Australian Spirulina - Australia.


While most of these companies are cultivating this microalgae in open-channel raceway ponds, Tom Vered, a young Israeli has designed  a grow-it-yourself kit that anyone with a sunny window can use to grow fresh, vibrant spirulina.


Read the below links to check how he does it - 


http://www.grow-spirulina.com/Articles.asp?ID=258


 http://www.greenprophet.com/2013/05/grow-spirulina-superfood-at-home-with-a-diy-kit/

Tue June 25 2013 11:25:45 AM by Sindhuja Spirulina cultivation

Algal Scientific making money from Beta Glucan

Read how Algal Scientific managed to become a profitable company - http://www.annarbor.com/business-review/accidental-discovery-leads-to-revenue-for-algal-scientific/

Wed June 19 2013 05:37:10 AM by Sindhuja 5 Algae Product  |  Algal Scientific  |  Beta Glucan

Algae Genetic Engineering

An useful article which summarizes the various genetic engineering techniques followed in the algae metabolic pathways for enhanced biofuel production - http://ec.asm.org/content/9/4/486.full.pdf

Wed June 12 2013 06:19:57 AM by Sindhuja 1 Lipid Biosynthesis  |  Algae Metabolism  |  genetic engineering