; charset=UTF-8" /> Advantages of Heterotropic Algae for Biofuels | Oilgae Blog

Comprehensive Algae Fuels Report

A detailed report on all aspects of the algae fuel value chain, the Comprehensive Oilgae Report will be of immense help to those who are on the threshold of investing in algae biofuels. More »

Algae-based Wastewater Treatment

Compiled by a diverse team of experts, with experience in scientific and industrial fields, the Comprehensive Report for Wastewater Treatment Using Algae is the first report that provides in-depth analysis and insights on this important field. It uses innumerable data and information from a wide variety of expert sources and market studies, and distills these inputs and data into intelligence and a roadmap that you can use. More »

Comprehensive Guide for Algae-based Carbon Capture

A Comprehensive Guide for Entrepreneurs and Businesses Who Wish to get a Basic Understanding of the Business Opportunities and Industry Dynamics of the Algae-based CO2. More ››

Comprehensive Report on Attractive Algae Product Opportunities

The report provides an overview of the wide range of non-fuel applications of algae – both current and future prospects. It will provide entrepreneurs with an idea of how to derive more benefits from their algal energy ventures. The report provides detailed case studies, success stories and factoids of companies that have been involved in the algae products venture More »

Comprehensive Castor Oil Report

There is no other comprehensive report available for castor oil anywhere in the world. This is the first of its kind, and currently, the only one. More ››

Bioplastics Market & Strategy Advisor

Bioplastics Market & Strategy Advisor, published by the Bioplastics Guide, is a unique guiding framework for businesses and entrepreneurs to chart a way forward provides a critical analysis of the status, opportunities & trends of the global bioplastics sector. More ››

Algae-Useful Substances





Other Novel Applications

Talk to us

Email: consult@eai.in


Call Narsi 7358263274

займ на карту ночью

Advantages of Heterotropic Algae for Biofuels

March 1st, 2009 | 3 Comments | Posted in Algae-Cultivation, Algae-Ethanol

You are at: Oilgae Blog.

The following was a comment provided at one of the blog posts on ethanol I read recently. While I’m no expert on the heterotrophic processes, the arguments here really sound interesting;

The Advantages of Heterotrophic Algae Grown at Corn Ethanol Refineries

Solazyme and Solix use two distinctly different methods to produce algae. Solix grows photo-autotrophic algae in the light. Solazyme grows heterotrophic algae in the dark.

Heterotrophic algae does not require sunlight, but the tradeoff is you have to feed it some kind of sugar. Initially, that sounds inefficient. Why expend the cost of sugar, when you can grow algae in sunlight for free. Look a little deeper, and here are the advantages of growing heterotrophic algae in the dark: (1) By growing algae in the dark, the process is simplified. Otherwise, you have to get the algae exposed to the light, or get the light to the algae. That takes up solar surface area, which translates into large land masses. (2) Because the algae can be grown in the dark in tanks, it can be grown anywhere, with a minimum footprint. (3) Heterotrophic algae, grown in nutrient rich water, becomes many times more concentrated, at a hyper fast growth rate.

HETEROTROPHIC algae grows in the dark, and multiplies rapidly when fed sugars or local biomass cellulose converted to sugars. Beside Solazyme, this technology is also being developed by East Kentucky University and General Atomics, working together. They are leveraging local biomass sugars by feeding it to heterotrophic algae grown in vats. Researchers claim that heterotrophic algae can reach densities in the dark that are 1,000 times higher than strains of photo-autotrophic algae that must be grown in the light.

Heterotrophic algae can be grown in the dark in tanks, using very little land. Tanks can be stacked a hundred feet underground, or stack them a hundred feet high above ground. Stack them in a high rise. Grow it in gray water in your basement, on your roof, under your backyard, or under a parking lot, using no additional land. Grow it on a barge.

Take local sugars derived from biomass, corn or sweet sorghum, or food and paper waste, or sewage, or what have you. And leverage the sugars to multiply the algae many times. That is going to be your massive source of feedstock for ethanol, biodiesel, feed, fertilizer, or for whatever you want to make.

Corn ethanol refineries have readily available waste heat, CO2 waste, nutrient rich waste water effluent, and corn sugars. This is a perfect match for growing heterotrophic algae. Why take corn sugar and feed it to algae? Because you multiply the feedstock many times in a short period of time, onsite. It’s conceivable that you could combine a tablespoon full of live algae with a pound of corn sugar, and bubble CO2 waste through a medium of nutrient rich waste water effluent, keep it warm with waste heat, and get a return of 20 pounds of algae or more within 48 hours.

Take all the corn sugar that is now going straight to 10 billion gallons ethanol, and instead, feed it to heterotrophic algae in tanks. At only 20X, that would yield upwards of 200 billion gallons of ethanol per year in the U. S. alone.

Out of tens of thousands of strains of algae, thirty two types of heterotrophic algae have been identified thus far. Some are high in starch. Some are high in oil. Some are high in proteins. Depending on what you want to produce, you would select your strain accordingly. And after your primary product has been taken from the feedstock, you would also make value added products from the remaining materials. Grow a high starch variety of algae ideal for ethanol production. Grow a variety of algae ideal for oil production, or high protein feed production, or fertilizer production. Since corn ethanol plants already produce distillers grains and supply the livestock industry, they would now have a second high protein feed product to market alongside.

We now have 172 corn ethanol refineries, which form a viable framework for a much bigger biofuel and feed industry yet to come.

Well, I guess I have one big question for those who think heterotrophic growth method is great. Whatever be the X (10X, 20X) whatever, if the algae are growing to derive most of their energy from sugar (non-photosynthetic sources), you will need almost as much sugar or more as the energy generated ultimately from ethanol (if the only energy sources are sugar, nutrients, CO2 and some warmth). The following sentence sounds too good to be true: “It’s conceivable that you could combine a tablespoon full of live algae with a pound of corn sugar, and bubble CO2 waste through a medium of nutrient rich waste water effluent, keep it warm with waste heat, and get a return of 20 pounds of algae or more within 48 hours.” How does it produce 20X mass from just less than 2X of sugar + initial amount algae? Are the rest 18+ pounds derived from CO2 and nutrients? In that case, we are going to need a lot of nutrients and CO2, and both have costs attached.

I need to dig deeper into the economics of heterotrophic growth, but the comment has surely tickled my interest. I doubt the numbers are as good as those presented at the comments, but let me first do more research on this.

By the way, have you subscribed to the Oilgae Blog?; How about joining the Oilgae mailing list? – RLS; and our forum to discuss on with others?

Leave a Reply 9104 views, 1 so far today | | posted by
Follow Discussion

3 Responses to “Advantages of Heterotropic Algae for Biofuels”

  1. Anonymous Says:

    This all seems too good to be true. How does heterotrophic algae consume CO2, surely if there is no photosynthesis then the chemistry of the system becomes an overall CO2 producer, not consumer. This method would therefore add to greenhouse gasses, not reduce them.

  2. Photovoltaic Cells Says:

    Thanks for this good post..

  3. sam Says:

    CXL-フランスのトップブランド ルイヴィトン バッグ 革は、革新的でエレガントなトラベルハードケースを設計し、製造を開始して1は、開始 ルイヴィトン コピー ハンドバッグや世界のために連動アクセサリー製品。ルイヴィトン 新作 2013休日シリーズのハンドバッグは、古典的なスタイルに導入 人気 ルイヴィトン 財布 もう一度古典を再現するスタイリッシュな新しい要素と組み合わせる。
    If not so anxious that most people would choose foreign purchasing Louis Vuitton Bags.Put aside the different countries and regions of different shopping preferences,Louis Vuitton UK buy Cheap Louis Vuitton hand-selected to not much difference,coupled with the big emphasis on the Chinese market,a lot of style is already the world simultaneous release,so the price is only one factor argumentative.Yes ah,regardless of money or not,who would not want to save money too?Especially the hundreds of thousands,to the less louis vuitton outlet there are thousands of big luxury.
    louis vuitton outlet 2013 spring quarter Men bags series,fluorescent colors,traditional innovation,louis vuitton sale bags for men inject new vitality.Since the designer Kim Jones added to the luxury brand cheap louis vuitton later,such as louis vuitton outlet online the French veteran hit booster as being a brand new look,young fashion taste can be described as more and more intense.
    Cheap Louis Vuitton luggage advanced customization services,Louis Vuitton Handbags section where a custom color Haute,is a senior in Louis Vuitton UK means,and the most common in the fashion circle is Haute couture-haute couture.By the designer and fashion boutiques in Paris,louis vuitton outlet must be members of the Association accreditation,an association recognized by the designers just enjoy “haute couture designer” of the title,its haute couture fashion works in order to use the title,and is protected by law.
    louis vuitton sale 2013 summer series handbags extraordinarily colorful and romantic extraordinary in louis vuitton outlet store,sweet peach pink,temperament dark blue as the main colors,combined with artistic temperament canvas texture printing,filling the art.In addition to flowers outside printing,more classic louis vuitton outlet Logo embossed Logo embossed or similar color as a decoration,cheap louis vuitton filling the big luxury noble gas.
    ルイヴィトン激安 2013年の春、さわやかなシンプルさの夏シリーズは、さらにいくつかの驚くほど簡単ですが、近い精査時にそれらを実現 ルイヴィトンのバッグ 美術品や工芸品の誇り:金属表面のストリーマあふれ感覚にマージ小さなスパンコール、少し大きめのビーズ縫い付けの場所微妙な三次元、フルを作成するには、グリッド上の4つの同等な方法の数千人 ルイヴィトンアウトレット 職人の技。 ルイヴィトン直営店 あなたの訪問を楽しみにしています。


Leave a Reply

You must be logged in to post a comment.

Hot Algae Products (Click to know more)
Omega 3 Spirulina Astaxanthin Chlorella

Get in Touch

Send us a message to know more on how oilgae.com can help your organization.