| 11. | There are three companies operating four biogas digesters with a fifth under construction.
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| 12. | Other treatment methods include heat, alkaline digesters and the use of microwaves.
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| 13. | Over the years, there have been a number of people promoting methane digesters.
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| 14. | The digester is an airtight circular pit made of concrete with a pipe connection.
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| 15. | Therefore, many digesters operate with codigestion of two or more types of feedstock.
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| 16. | Digesters processing dedicated energy crops can achieve high levels of degradation and biogas production.
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| 17. | In 1859 a leper colony in Bombay in India built the first anaerobic digester.
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| 18. | One use of vinasse is in thermophilic digesters.
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| 19. | These Aerobic Digesters are supplied with air from 3 blowers in a Blower House.
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| 20. | The digester typically produces biogas with a high concentration methane ( c80 % ).
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