Biogas

by hina on November 9, 2017 - 2:59pm

Biogas

By : Marine Gauthier, Audrey Rose Lucier, Catherine Martin, and Hina Idris. 

During the next century, the transition to renewable energies will be crucial to decrease the importance of human impacts on nature and the amount of greenhouse gases released in the atmosphere. Biogas is one of the many solutions that can be used to achieve the previous goals. It consists of “a type of biofuel that is naturally produced from the decomposition of organic waste.” Thus, biogas can come from various sources; the decomposition of plants, food scraps, animal manure, wastewater, sewage, and so forth. Mainly, it is ecologically friendly as it reduces the amount of methane released in the atmosphere from the waste we produce… Instead of being harmful for the environment, this gas can become an effective energy source with the use of the appropriate biogas digesters. Furthermore, it should be taken in interest especially by farmers around the world, as agriculture is “the primary source of methane emissions.”

 

Production

Biogas is produced with the breakdown of organic matter in the absence of oxygen. It is made in a biogas digester which is a large tank filled with bacteria. It can also be produces in some landfills. The biogas digester eats or digest the organic matter and then gives a flammable gas which is biogas. The whole process recreates what would normally happened in a stomach. This process is called anaerobic digestion. Waste that has been fully digested exits the biogas system in the form of organic fertiliser. Biogas microbes consist of a large group of complex and differently acting microbe species. At this time, there are four farms in Québec that produce biogas by doing the anaerobic process, while four others are planning to do so in the coming years.

 

Danger of Biogas

Biogas is essentially made of 60% of methane and 40% of carbon dioxide that can create health and safety issue. Due to large amount of methane present in the biogas, explosion hazard or fire are likely to happen. The equipment should be explosion-proof and sure to not ignite gas, so no flames or smoke should be near the equipments. Then, asphyxiation might happen if the biogas is situate in an enclosed space. One case of three people who died from asphyxiation was created in an enclosure space. This could be cause most of the time by a gas leak and can create an explosion hazard afterward. Finally, diseases could occur due to the presence of bacteria, parasites, and viruses in the animal wastes. When generating biogas or handling animal waste, not using good precautions could cause infections or spread bad odors.

Advantage of Biogas

Biogas that come from plants and cattles are eco-friendly, that means they are renewable and that they reduce greenhouse gas emissions effect. They also, reduce soil and water pollution as well as they improve the water quality. Furthermore, they create organic fertilizers for the soil, which can substitute chemical fertilizers. Other good reasons of why we should use biogas energy is that it reduces the amount of waste that go in the landfill, it creates green job and it minimizes the over reliance of fossil fuel. Moreover, we should use biogas because they have benefits for our health. In addition, it’s a simple energy, who doesn’t cost a lot of money and it helps our circular economy.  

 

Sources:

http://articles.extension.org/pages/30311/anaerobic-digesters-and-biogas-safety

https://homebiogas.com/blog/advantages-and-disadvantages-of-biogas/

http://www.simgas.com/advantages-of-biogas/how-does-biogas-work/item46

http://www.regeneratebiogas.com/what-is-biogas/

 

Comments

This is very good, the fact that you chose this topic is very intersting as not a lot of people know about this method. I like the fact that you described the positive and negative impacts of the technique as it gives it a realistic approach. The biogas method can have many safety impacts if the necessary precautions are not taken. It would not be worth it to use this methods but have many serious health impacts on the workers. If possible, it would be interesting to find ways to participate in using this method personally (excluding farmers and such), for instance to be able to contribute from home. Overall it is very good and I agree with it.

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