Biogas Production: Evaluation and Possible Applications

Abstract

Biogas is an excellent example of renewable feedstock for energy production enabling closure of the carbon cycle by photosynthesis of the existing vegetation, without charging the atmosphere with excessive carbon dioxide. The present review contains traditional as well as new methods for the preparation of raw materials for biogas production. These methods are compared by the biogas yield and biogas content with the possible applications. Various fields of biogas utilization are discussed. They are listed from simple heating, electricity production by co-generation, fuel cell applications to catalytic conversions for light fuel production by the Fischer-Tropsch process. The aspects of carbon dioxide recycling reaching methane production are considered too.

Biogas Production in AnMBRs via Treatment of Municipal and Domestic Wastewater: Opportunities and Fouling Mitigation Strategies

“…Biogas primarily consists of methane (CH 4 , 50-75% by volume), carbon dioxide (CO 2 , 25-50% by volume), and minor amounts of other gases, such as nitrogen (N 2 ), oxygen (O 2 ), hydrogen (H 2 ), hydrogen sulfide (H 2 S) as well as water vapor (H 2 O) (g) [2][3][4]. It is a green energy carrier characterized by a calorific value between 20 and 32 MJ/m 3 [5] depending on the CH 4 content. However, it is important to note that to find various applications, the methane concentration in biogas should exceed 90% [4].…”