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Nazry wants to know Temperature Control for a Photobioereactor 8 months ago
Hi, need some advise on whether direct cooling & heating elements is appropriate to be immersed in a 10L bubble column photobioreactor filled with microalgae? Thanks
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Kyzyl wants to know Carbon capture? 6 months ago
http://web.mit.edu/newsoffice/2011/carbon-dioxide-capture-1206.html
A new MIT study shows that, at least for the foreseeable future, proposals to capture carbon from the air are not realistic. Are you agree with this assertion?- View all 2 answers
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Under an open pounds or a semi continuous culture system, this reality is correct; mainly due to two facts: low CO2(g) diffusion into culture medium and a very high culturing area are required. But with continuous culture systems, required culture area can be reduced at least by 10 times; culture time can be reduced from 3 - 4 weeks to 3 - 4 days and productivity increased 1.5 - 2 times. All these improvements do it viable Carbon Capture.
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Narsi wants to know Flue Gases to Hydrocarbon Fuels - Challenges in Tech and Processes 10 months ago
I read about a company's (LanzaTech) efforts in converting flue gases to ethanol...
http://dev.sandbox.green.autoblog.com/2011/08/27/lanzatech-harsco-team-up-to-convert-steel-mill-flue-gases-to-et/
What are the technical and process challenges in converting flue gases to a range of hydrocarbon fuels?-
Flue gases are a very important source of CO2(g) for microalgae cultures for biofuels production. But, it´s so important verify and controlling SOx and NOx gases concentration into the culture medium. These gases causing serious damage to microalgae cultures.
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Gaya3 wants to know CO2 Sequestrated using Algae 6 months ago
Happened to read this paper "Biotransformations of carbon dioxide in photobioreactors"(http://www.mendeley.com/research/biotransformations-carbon-dioxide-photobioreactors/#), it's abstract says: Despite large amounts of CO2 that were sequestered during the cultivation, it is demonstrated that only a small fraction (about 3%) was effectively fixed as microalgae biomass, indicating the existence of other routes of CO2 conversion in the photobioreactor.
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Effectively, natural diffusion of CO2(g) into water is around of 3% and this is a normal concentration in open pound bioreactors due to they are open systems. But in PBR closed systems you can hiper saturated the liquid culture medium, when microalgae are in exponential grown, so that you can rise disolved CO2(g) concentrations as high as 15%, there is 5 times normal concentration. However you must to be account that these high disolved CO2(g) concentrations only can be supported by continuous culture systems.
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Joshwolf wants to know Residential Algae! 5 months ago
How do you see algae being incorporated into your home?
in CO2 Sequestration Domestic Wastewater Treatment Sustainable Homes and Communities Biotechnology
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It would be cool to have a gas pump that goes form the point of fuel processing to the garage too
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Joshwolf wants to know what you think about a green roof 5 months ago
Would you place plastic tubing on top of your roof(facing south) to produce about a gallon of fuel a day?
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What do you think would happen if you found the gene sequence responsible for the production of photosystems in algae and copied and pasted this protein into the gene sequence? Would there be more photosystem structures, and would that increase the efficiency of light capture?
http://www.facebook.com/AlgaeFuel -
Prachi wants to know How to purify cyanobacterial culture? 7 months ago
actually i wan to purify the cultures in my lab..i used many methods like Uv treatment,antibiotic..but they are not working.my all cultures contaminated with bacteria and fungus..plz can any one suggest me the ways to purify it?
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ok thank you i will do this serial dilution method and i don`t have cell sorter but thanx
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Greennova wants to know Greennova technology overview 9 months ago
GREENNOVA, italian startup company, is active in microalgae technology for biobased chemicals. Technology portfolio includes waste to energy system, waste recovery, waste water treatment, CO2 capture.
Company : GREENNOVA srlin Algae Fuels CO2 Sequestration Industrial Wastewater Treatment
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Hi, can you let me know what is unique about the biochemicals portfolio your company has? Thanks!
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Cll123 posted a blog Photobioreactors as adaptive shading devices 3 months ago
Since 2009 Arup Germany has been leading a research collaboration with COLT International and SSC, a small enterprise specialised in hydrobiological processes. The collaboration is about the integration into buildings of photobioreactors (PBR). The poject is funded by the initiative ZukunftBau of the German Federal Ministry of Transport, Building and Urban Development.
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Joshwolf shared a video POWER PLANT FLUME GAS TO FUEL 5 months ago
A very intriguing video of an algae application aimed at reducing co2 and NOx from power plant exhaust with algae. The algae grows thickly and rapidly producing high oil yields for fuel production
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Joshwolf shared a picture RECYCLED ALGAE DRYING METHOD 5 months ago
This model I made uses old pop cans painted black to dry algae. Filtered algae sludge is fills the pop cans. The pop cans then sit out in the sun for 3 hours, evaporating out the water in the algae to an 8%water content. The dry meal can be used for composters, fertilizer and diesel fuel production. (Every dry kilogram of algae has sequestered 2.2 kilograms of CO2)
in Biodiesel Algae Fuels Biomass to Liquid Solar Water Heating and Drying CO2 Sequestration Biotechnology
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Josh, great job! I'm sure there is a way to make a product with this concept but I'm concerned about the time it takes to fill up the cans. At the very least this is probably the most economical method of drying I've seen done on a small scale for individual use. Do you have plans for scaling up as a waste processor from continuous production? That way you would have a continuous waste of sludge. How long did it take to get all that sludge and what is the ratio of sludge to your primary deisel production in the same amount of time? @Woolncathairs, after the algae is dried, the oil is pressed out with a screw press, and the rest is then heated out. Or... Flash pyrolysis is an energy intensive method that converts algae paste directly into bio crude which then is converted into b100 diesel through transesterfication then is cleaned if needed. Transesterfication is the most used method after pressing as well. However, the best way to get oil out of algae is through live extraction or "milking" which basically sucks the oil out of the algae without harming them. The oil then floats to the top which can then be extracted and processed, and the harvested algae sinks to the bottom where it can be taken back into the bioreactor to regrow more oil. This is way more efficient than batch processing which kills the algae. Batch processing may be good for some applications let's say if you want to extract proteins, carbohydrates and fats for multiple uses; but this is energy intensive because you have to dry the algae to get the products out which also requires various separation methods. To avoid the cost of separation and processing with batch harvesting, it is a good method to produce a high BTU biomass to burn for steam power in a coal plant (the waste heat from the plant can be used to dry the algae) but not for applications that target one needed product like oil. This is also due to the fact that a batch of algae killed requires a batch of algae born, and regrowing new fat cells is way less energy intensive than growing a whole new body. Compare it to telling a fat person to go get fat again after lyposuction; to killing a fat person and telling his friends to have a bunch of kids to grow up and replace him. If you're going to do any research at all it should be on milking oils, carbs, and proteins for specific applications at their point of use to minimize transportation cost. That is one way to undercut fossil fuel prices because fossil fuels cannot be cultivated anywhere and therefore require a large transportation infrastructure. Also, in regards to the drying method. Once you press out the oils the rest is fermented to get alcohol out of the sugars while the protein is used as feedstock and the waste from fermentation is used for fertilizers. There is a wide range of uses for that waste though instead of just fertilzers, like recycling it back into the system as algae fertilizer or used for processing, for better energy conversion.
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Joshwolf shared a picture GREEN ROOF IN ST. PAUL 5 months ago
I'm creating an environmental education program at an intercity school called DIVINE Institute in St Paul, Minnesota to reach at risk students. The program will feature a $12,000 green roof equipped with solar panels, algae photo-bioreactors, and solar heating for the building. So far, I have raised $8,000 in grant funding!
I'm looking for people interested in donating to this non-profit effort or people interested in contributing information you would like included into the curriculum, so I would love to here from you all!in Biodiesel Algae Fuels Green Buildings Biodiversity CO2 Sequestration Public Transportation Cleantech Education in Schools Cleantech Careers and Jobs
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Kyzyl wants to discuss Will carbon emission reductions ever be enforced globally? | SmartPlanet 5 months ago
The Durban climate talks have reached a promise to sign a global treaty by 2015. However, is this an empty promise, or will it help reduce carbon emis - http://www.smartplanet.com/blog/smart-takes/will-carbon-emission-reductions-ever-be-enforced-globally/21156?tag=nl.e660
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¿Will Carbon Emission Reductions Ever Be Enforced Globally?... I think than yes, if carbon capture is based on CO2 forced diffusion trough PBRs, accomplished of absorption by natural difusion on race pounds photobioreactors.
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Joshwolf shared a video Community Scale Algae Production System 5 months ago
Just a look at what algae production systems could look like. It doesn't necessarily need to be big companies who are growing there own fuel, but an effort from smaller scale "community" models. This fuel would also remove more CO2 than it produces, and if it doesn't even have to be shipped, the possibilities for a new, balanced, alternative energy source are endless
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This algae is finally starting to grow and the growth is actually going really fast. This video shows algae grown to double the concentration of this strains normal growth plateau level. The oil percentage has also raised from 50% to 85%!
- 1 person added this post to their reference
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Joshwolf shared a picture Baking Soda in algae 6 months ago
I've been doing a lot of private research for multiple high school science fair projects on algae over the past 2 years and found a couple interesting things about carbon sequestration
Blue and Red Light:
Using blue and red light on algae dramatically increase growth rates but even more so increase the rate of the Calvin cycle. The Calvin cycle in plants is what is responsible for turning CO2 into sugars proteins and fats. When this is speed up CO2 sequestration picks up and CO2 is removed much MUCH quicker.
Sodium Bicarbonate(Baking Soda):
Baking soda is an excellent tool for carbon sequestration. It increases the pH difference between the cell wall and turns on sodium protein pumps which, through a long chain of events, increase the Calvin cycle and golgi apparatus(hydrocarbon production) 10 fold.- 1 person added this post to their reference
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Divyajeychandren wants to discuss Salt-tolerant crops show higher capacity for carbon fixation 6 months ago
Salt-tolerant crops show higher capacity for carbon fixation.
http://www.sciencedaily.com/releases/2011/12/111212124703.htm?utm_source=feedburner- View all 2 comments
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Perhaps I missed it, but can someone tell me what new concept the researchers have discovered? Isn't it obvious that salt tolerant crops will grow well, have better yield in saline conditions and hence fix more carbon (more the yield = more carbon fixed). So, what exactly is new or interesting in what these folks are saying?
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Divyajeychandren wants to discuss 5 Wacky Ways to Fix the Planet 6 months ago
With heat, tornadoes, drought, fires, extreme weather and flooding, the climate has certainly caught the world's attention in 2011. While scientists debate just how much the world is warming and how much of that has to do with human impact, others are taking it upon themselves to reverse the changes through technology. Here are five schemes that may seem pie-in-the-sky at first, but could soon have a big impact on our planet:
1. Make it rain- Seeding the skies to grow more crops.
2. Who let the CO2 out?- Trying to scrub the air is much more expensive than keeping it from getting dirty in the first place.
3. Everything’s better under the sea- The idea of taking trapped carbon and storing it far underneath the ocean floor.
4. Power your house with your car- A Smart Home Charging technology designed to encourage consumers to move away from using electricity provided by the main grid and use their car for more than just motoring.
5. Stink things up- Smelly algae has potential as a power source. It takes what we generally think of as waste — be it sewage, C02 emissions or, fertilizer runoff — and uses it to grow. Oil can then be separated from the algae and used as a biofuel.
http://stateimpact.npr.org/texas/2011/12/15/5-wacky-ways-to-fix-the-planet/in Algae Fuels Global Warming and Climate Change CO2 Sequestration Electric, Hybrid and Plug in Hybrid Electric Cars
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I would not call these wacky, perhaps "very difficult" would be a better adjective
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Kyzyl wants to discuss Industrial “inertia to change” is delaying development of zero carbon homes, report finds 6 months ago
UCL News RSS Feed: The latest news from UCL. - http://www.ucl.ac.uk/news/news-articles/1112/111216
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Salt-tolerant crops show higher capacity for carbon fixation - http://www.sciencedaily.com/releases/2011/12/111212124703.htm?utm_source=feedburner
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Kyzyl wants to discuss Findings on biochar, greenhouse gas emissions and ethylene 6 months ago
Findings on biochar, greenhouse gas emissions and ethylene - http://www.sciencedaily.com/releases/2011/12/111213114711.htm?utm_source=feedburner
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Kyzyl wants to discuss Hot export of 2010: Carbon emissions | SmartPlanet 6 months ago
About 510 million extra tons of emissions were pumped into the atmosphere in 2010, the largest jump since the Industrial Revolution. China might be th - http://www.smartplanet.com/blog/intelligent-energy/hot-export-of-2010-carbon-emissions/10958?tag=nl.e660
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Kyzyl wants to discuss Carbon dioxide emissions rebound quickly after global financial crisis 6 months ago
Carbon dioxide emissions rebound quickly after global financial crisis - http://www.sciencedaily.com/releases/2011/12/111205140613.htm?utm_source=feedburner
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Kyzyl wants to discuss Global carbon emissions reach record 10 billion tons, threatening 2 degree target 6 months ago
Global carbon emissions reach record 10 billion tons, threatening 2 degree target - http://www.sciencedaily.com/releases/2011/12/111204144648.htm?utm_source=feedburner
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Kyzyl wants to discuss China's demand for oil will equal US demand by 2040, study predicts 6 months ago
China's demand for oil will equal US demand by 2040, study predicts - http://www.sciencedaily.com/releases/2011/12/111201132521.htm?utm_source=feedburner
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Kyzyl wants to discuss Green government buildings cost 19 percent less to maintain | SmartPlanet 7 months ago
On average, the 22 GSA buildings studied by the Department of Energy’s research lab used 25 percent less energy than those not managed with sust - http://www.smartplanet.com/blog/business-brains/green-government-buildings-cost-19-percent-less-to-maintain/20132?tag=nl.e660
in Green Buildings Global Warming and Climate Change CO2 Sequestration
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Kyzyl wants to discuss Breakthrough Holds Promise for Hydrogen's Use as Alternative Fuel - UT Dallas News 7 months ago
Breakthrough Holds Promise for Hydrogen's Use as Alternative Fuel - UT Dallas News - http://www.utdallas.edu/news/2011/10/27-13641_Breakthrough-Holds-Promise-for-Hydrogens-Use-as-Fu_article-wide.html
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Ps21 posted a blog Sustainable Future in Development Countries (Latin America, Africa and Asia). 6 months ago
Research and Innovation in Low Cost , Green & Clean Technologies to provide food and feed to our communities and hungry people, upgrade to efficient and integrated production systems, entrepreneuships and community development, environmental protection and conservation, mitigation & adaptation to climate change. Algal Technology as a key-stone for integrated systems (water treatment, food production, CO2 capture and others) in urban and rural environments. Eolian & solar energy (chemical or photosynthetic, thermic and photovoltaic) to move production systems more efficiently.
in Solar PV Solar Thermal Sustainable Agriculture and Forestry Organic Farming Global Warming and Climate Change Biodiversity CO2 Sequestration Agri Waste Management Water Conservation and Reuse Domestic Wastewater Treatment Sustainable Homes and Communities Clean Development Mechanism Biotechnology














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Ibscipio 3
months ago
Answer this question / Share a linkYour volume is tiny so the temperature stability needed to produce a consistent algae harvest from day to day will be difficult. Especially using any kind of direct interface. I recommend buying/building a small fluid-to-fluid heat exchanger out of plastic. FYI Georg Fischer Inc. manufactures a HUGE plastic heat exchanger. The total temperature swing from noon to midnight you seek to maintain is 3 deg. F. That's all you get and still have consistent algae produced from day to day.