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Sun Jun 25, 2017, 02:26 PM

Sweden's carbon capture method for cement is rather unique...

Cement production, it turns out, is a major source of carbon dioxide. It also happens to be a top industry in Sweden.

So the country is at a crossroads—how does it keep creating one of the most widely used materials in the world, while also bringing emissions to zero?

The answer: algae.

Nestled in the quaint village of Degerhamn, Sweden, a cement factory called Cementa (owned by the international conglomerate HeidelbergCement) is implementing a new initiative that uses algae from the nearby Baltic Sea to capture the factory's carbon dioxide emissions before the gas enters the atmosphere.

Cement is composed largely of limestone, a substance that, when heated, releases carbon dioxide into the atmosphere. In addition, fossil fuels are burned in the process of heating the limestone, emitting even more carbon dioxide.

The process that Cementa uses is simple. First, water from the Baltic is pumped into large bags that can hold about 800 gallons of liquid. Then, nutrients are added to multiply the algae. Finally, the liquid is mixed with the factory's waste and left to sit in the sunlight, which gradually absorbs all the carbon.

This system was created...


Not mentioned in the article is the various uses for algae - biodiesel being one I have a lot of hope for as a major future player in the heavy lift transportation sector.

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Reply Sweden's carbon capture method for cement is rather unique... (Original post)
kristopher Jun 2017 OP
pansypoo53219 Jun 2017 #1

Response to kristopher (Original post)

Sun Jun 25, 2017, 03:49 PM

1. because they believe.

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