sludge digestion gas
41Biohydrogen — is hydrogen produced via biological processes.FermentationBiohydrogen gas can be extracted from biomass through dark fermentation and/or photofermentation by bacteria.Fermentation plantsFermentative hydrogen production plants are proposed… …
42Agriculture and Food Supplies — ▪ 2007 Introduction Bird flu reached Europe and Africa, and concerns over BSE continued to disrupt trade in beef. An international vault for seeds was under construction on an Arctic island. Stocks of important food fish species were reported… …
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