In Himalayan communities it is expensive to transport LPG gas and there is a decrease in the amount of firewood that can be harvested from the mountain. An alternative and renewable source of energy is to use methane which is produces from manure
Methane is produced through an anaerobic bioreactor which uses cow manure and waste from the communities as a fuel source. Methane is used as a energy source to power stoves and pump water. It is a renuable source of energy. Methane is a more effective green house gas than carbon dioxide therefore burning it and produces carbon dioxide is better for the environment than just releasing methane.
Less need to harvest firewood therefore reducing labour and deforestation
Can be used as energy source to pump water therefore reduces labour
The slurry which is the waste product can be used as a compost which contains ammonium rather than just nitrates therefore it is more benefical to plants and prevents acidification of soil.
The bioreactor is underground therefore using less land.
Provides fuel for cooking and heating water.
30% reduction of gas in winter
Requires capital cost
The plants have to be maintained by skilled workers therefore training needs to be provided and a understanding of microbiology is needed
Financing solution and application in Columbia
Applying this technology to Caldas would be benificial as it would provide a renewable source of energy to the people produced from manure. The capital investment can be paid for with a slight charge to individual homes for the services which goes back to financing the loan and maintaining the costs of running the plant. Coffee husks can be turned into activated carbon honey comb monoliths which is used to absorb and capture methane in this process. Due to the large coffee industry there should be plenty of waste to process. The slurry produced can be used for composting for agriculture or to increase soil structure by adding organic matter into the soil to improve structure. The slurry can be sold as a source of income for the people to maintain the costs of the methane.