The Biodigester and its Benefits – TransformAsia

The Biodigester and its Benefits

09 Jan

The Biodigester and its Benefits

Consider showing the love of Christ by providing a sustainable source of energy and high quality fertilizer to TransformAsia projects by funding a biodigester. In addition, biodigesters reduce the amount of deforestation by decreasing the need of charcoal. Wood accounts for more than 80% of the total national energy consumption in Cambodia. The natural forest, the main source of fuel wood, has been severely degraded due to widespread logging and forestland conversion.  Biodigester Benefits Economic Benefits: -Saves expenditures on fuel sources such a fuel-wood and charging of batteries (payback period for biodigester is less than two years in energy savings alone); -Enhance soil productivity because of the use of bio-slurry (refer to benefits of bio-slurry); -Reduces the quantity of chemical fertilizer; -Save health care expenditures due to decrease in smoke-borne diseases; -Provides employment to local people. Health Benefits: -Contains animal waste into one central location, which improves sanitation; -Attaching latrines into bio-digesters improves water quality; -Reduces smoke borne disease (respiratory infection, dizziness, etc.). Environmental Benefits: -Preserve/conserve forest; -Reduce green-house gases (primarBiodigester systemy methane); -Prevent land-fertility degradation due to excessive use of chemical fertilizers; -Protects rivers, ponds, etc. Social Benefits: -Reduces workload especially for women and young girls since gas is instantly available; -Less time in collecting biomass so that children can go to school; -Provides a bright light to help in education and household works; -Reduces smells associate to human and animal waste, bio-slurry from the plant is odorless; -For projects that have electricity, gas offers a backup source of energy. Bio-Slurry Benefits: -Is pathogen free; -Bio-slurry from the biodigester is odorless and does not attract insects or flies in the open; -Unlike raw dung, bio-slurry does not attract termites, which harm plants; -Studies show weed growth is reduced to approximately
50% by using bio-slurry; -Has greater fertilizer value than compost manure or fresh dung; -Is an excellent soil conditioner and increases the soil porosity and water holding capacity; -Bio-slurry can be mixed with food or crop waste to increase nutrient value; -Accelerates the rate of composting; -Compost increases crop production by 10-30%; -Is effective over a period of three years. The cost for each biodigester ranges between $500 and $1,000 depending on the size and the location of biodigester. Installation of a Biodigester includes one lamp and one gas cooking set up (burner and rice cooker). Experienced contractors will install the bio-digester, which has a 2-year warrantee. The expected life of a biodigester is over 20 years. Questions: Please contact Jeffrey J Wing, PE LEED AP at jeffwing@me.com Notes: 1. Cost includes a $150 subsidy from the NBP. 2. Data provided by the National Biodigester Programme (NBP) Cambodia. ———



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