Find out everything there is to know about clean technology. Get your doubts and queries answerd by the global clean technology community - (1126)
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Rizwan posted a question People what do you think about Algae hydrogen fuel? 6 months ago
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Kriben posted a question I am looking to set-up a microalgae biorefinery. I am interested to know based on 1 acre of land: 1) what species are the best for producing valuable byproducts(based on biodiesel, astaxanthin, petrochemicals, bio-oil, biogas electricity etc) 2) Which is the best VPBR, PBR system available at present? I am trying to set up a biorefinery system which is efficient and produces the most valuable byproducts which is also in demand to the market. Any suggestions are appreciated.... Thanks. 5 months ago
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Catentoids, Chitin, Aminegloycol Kerosene(C-12-16) Diatomaeous Earth-Silicon Dioxide 5-50 C Salt or freshwater envrioment want a sample? I feed pure Co2 from a puerasurized tank. Are you going to use a stack, exhaust source or botteled carbon dixoide? Good to hear it. Great Idea! advancedbiofuels@yahoo.com
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Kyzyl wants to know Is Algae Worse than Corn for Biofuels? 4 months ago
Who can comment this? http://www.scientificamerican.com/article.cfm?id=algae-biofuel-growth-environmental-impact
in Algae Fuels
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In response to Kyzyl, in a comment 5 months ago. I do not know this Dr Commoner, but if he believes as you assert, he is incorrect. Pay no attention to him.
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Narsi posted a question How much energy does a centrifuge use? 10 months ago
I read that a centrifuge uses 48.8% of the total energy consumption during algal biofuel production ( http://www.oilgae.com/blog/2011/08/a-centrifuge-uses-48-8-of-the-total-energy-consumption-during-algal-biofuel-production.html)...that sounds an awful lot of energy...is this estimate correct?
in Algae Fuels
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It would take nearly six of the 150 hp centrifuge's at max capacity to do the job.
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Narsi wants to know Why isn't the world becoming fully vegetarian? 8 months ago
All right, you could say I take a high moral ground while asking this question, but there it is.
I am a strict vegetarian by choice, and my preference is guided primarily by ethics ("killing animals when they don't harm us is wrong"). But I am here not to discuss the ethics of vegetarianism (which I will be glad to discuss on My Desk), but the sustainability of being vegetarian.
Apart from the obvious greenhouse gases increase owing to the large number of cattle population because of non-vegetarianism, there could be other aspects that hinder a progress to sustainable world.
So, being vegetarian is not only ethical but also makes the world more sustainable. So, why isn't the world not turning vegetarian? Is it because they cannot control their taste buds? That sounds like such a crime!
What are your thoughts?- View all 22 answers
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In this dispute the serious thing is missed. Not only proteins are necessary. The meat and fish can give to man's organism the largest quantity of irreplaceable amino acids. To receive all complex of amino acids through vegetative food very difficult due to necessary quantity of food and by a necessary variety of vegetative one. As usual, the easiest way was chosen by the nature. The necessity to break customs, traditions, habits also is very difficult even in case of comprehensive food supplying and acceptable price on it.
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Isnt it true that algae also respire during night and release CO2 at that time? Why would we want to tamper with a natural cycle?
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As discussed, on an average 100 watt energy can be generated from a meter square solar panel on a sunny day....
so what is the measurement for those incident solar radiations falling on that solar panel out of which we are able to harvest 100 watt.
so that we can conclude ---- units radiations did fall on the panel today that's why --- watt energy was harvested.
Because radiations/energy in a sunny day in New york will be different than that of in Sahara desert...in Solar PV
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Okay that makes the panels between 22% and 30% efficient, which I really doubt that is going to happen. I am wondering where he came up with these magical solar panels that are supposed to be that efficient? Still no where near 98% efficient as you first article suggested (correction 96% efficient).
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Kkbiodiesel wants to know Do you think the Oil Giants are influencing the government policies to curb the growth of biofuels market? If yes, how can we overcome this problem? 7 months ago
I saw a documentary yesterday named- Gashole. It demonstrated the stronghold of the Oil Companies over the regulation of the federal policies. Can this be the reason that the Biofuels are not readily commercialized?
in Biodiesel
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Well Narsi, I think if the question is which oil companies can co-opt for Bio-fuels, then the short answer could be those oil companies who are both into upstream and downstream, leave alone the companies in OPEC region. Considering the pressure that is happening in oil as a commodity and as a principal agent for economic activities across the global supply chain, they do diversify for evolving alternatives not for mere PF, though they derive some mileage by that means, slowly they may be putting their eggs on this basket of Alternate fuels at least in R & D stage to develop it to a niche product for optimal usage. As of now concentrations in fossil fuels by these people cannot be foregone because of its various underpinnings. Oil because of its hydrocarbons content caters to various downstream industries, say for Eg. Plastics. The question for bio-fuels on its off-takes, also underpins on how this fuel can cater to at least major part of the downstream industries. R & D must be directed towards analyzing this utility side. That is where the constraint is on the larger scheme of things. Unlike Fossil fuels, Bio-fuels are grown on visible surfaces. IF it is mainly for consumption needs of transportation and power generation, as a fuel for irrigation pumping systems, then, its off-takes are already limited, though consume the bulk of oil as a principal raw material. I think Exxon as already directed its investments towards this bio-fuels side. Considering the fact that US imports near 60% of its consumption needs by way of import and given the subsidies and policy support people of US enjoy on agriculture and their land size as compared to developing nations, they can devise their cropping plan for this purpose. In small nation states, I think, they would be again be forced to import, given the vulnerabilities on surface land. Say Philippines or Vietnam, their seismic zones vitiate them from making optimum use of their geography. In order to cater to export market for edible oils, they have destroyed the massive rain forests which acted as a mitigant for climate change in order to plant Palm trees. All these activities pose huge question on land availability. I think African nation states could be the mine field for developing bio-fuels. Probably Companies like Exxon, Total, Shell may put their basket here as need for Bio-fuels increase gradually due to pressure from Environmental managers. Already Europe is contemplating to introduce Emission Trading System on flights that land in their region in order to thrust regulation on all these activities, initially as a compliance and laterally as a participative norm. African countries have huge sahara desert which can be used for putting investments on generating Algae fuels. That way, these countries may also prosper on socio-economic metrics by catering to evolving consumption needs as exporter countries. All these countries can form a consortium on making use of this desert for deriving substantial gains out of this akin to what OPEC countries did/doing in the last 50 years. They may become set of developed nations in a matter of two decades, if this proves to be a viable proposition. For people who are going to Import, including India, they can be the investor of this business invitations, much like what ONGC is doing thru OVL for investing in oil fields across Russian and nigerian countries. That way price barometers can be kept in check during trade-offs across various demand markets. Why should only western Oil companies do that? I think this is a viable business case. We have Thar Desert. Even this can be utilized. Instead of building Nuclear Reactors for enriching Uranium, govt can put its resources through policy level support.
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Thudpucker posted a question Extracting Oil from Lipids at Home. What is the safe method? 10 months ago
My idea is to grow the alga, process and dry it, and extract the oil from lipids, right here on my property.
But safely! Safety is the main concern.
Anybody have a suggestion for me?
Has anybody, you or somebody you know, ever done this?- View all 16 answers
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Let me put it this way. Once you squeeze out the oily soup, and filter it. the transesterification process removes the oils from the "lipids". The "lipids" will settle to the bottom and the oil you want to use for diesel fuel will be on the top.
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Rcollins posted a question I don't understand why most people don't carry on a conversation here? I thought that was the point to this blog. 9 months ago
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Please excuse the spelling and grammar....long day.























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Donmichael 6
months ago
Answer this question / Share a linkI am aware that hydrogen production from algae as a byproduct of oil production is possible, but how much and how to do this is the question. I would like to know if it is possible to harvest enough hydrogen to power enough fuel cells to operate a fully automated end to end algae fuel system of relative size. If I can use the hydrogen to power a small scale system then I think that would adress the issue of storage because the hydrogen would then be used continuously on sight. This would also be a way to make it economic. I am not looking for large scale production of any product from algae. Does anyone know about OriginOil's hydrogen harvesting methods? I am making a self sufficient system that does not require any seperate energy source.