From the 50-day storage of biogas is the number of cubic meters, or 6.07 a fraction equal to 2.76 kg cooking gas at a cost per kilogram are at 26.48 Thai baht if purchased grass, fermented, and if planted 19.96 kg baht, compared to fermented grass in both cases to buy cooking gas in the present. The price is 15 kg size tank 400-410 baht nett 26.70 kg and found that biogas fermentation from grass, nepia is worthwhile at a cost lower than approx. kg. 0.22-6.74 baht, depending on the value of materials and equipment in the production of biogas fermentation system from grass, nepia.
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