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Types of Biogas

Additional Equipment
Additional Equipment

High levels of sulfide in biogas may require removal to protect equipment if the gas is to be used in internal combustion engines, turbines, or fuel cells. The concentration of hydrogen sulfide in the gas is a function of the digester feed substrate and inorganic sulfate content.

Biogas Collection Methods
Biogas Collection Methods

Page 2 Materials and Methods for Biogas Production • Background Biogas Process • Applicable Substrates • Substrate Pre-treatment • Monitoring devices

source: peebpe.eu
Figure 11 Canal Biogas Plant
Figure 11 Canal Biogas Plant

A biogas plant consists of the following components; mixing tank and inlet pipe, the digester, gas piping system, expansion chamber and components for the regulation and utilization of biogas products (gas and bio-slurry).

source: snv.org
Figure 12 Fixed-Dome Plant
Figure 12 Fixed-Dome Plant

Fixed Dome Biogas. The fixed dome biogas system is also known as Chinese model biogas plant which was developed and built in China the 1930s. The unit consists of an underground brick masonry compartment (fermentation chamber) with a dome on the top for gas storage. Fig 1. Fixed dome biogas plant. Numbers in thefigure correspond to: 1.

Figure 13
Figure 13

Figure 13 shows the LCOE from large biogas power plants 500kW el for differing from SMG 480 at BU

Steel, Concrete and Masonry Digesters [8,19]
Steel, Concrete and Masonry Digesters [8,19]

Cement-plastered/rendered masonry is a suitable - and inexpensive - approach for building an underground biogas digester, whereby a dome-like shape is recommended. For domes larger than 20 m digester volume, steel reinforcement is advisable.

Substrate Feed Methods
Substrate Feed Methods

Pretreatment of feedstock Methods used to assess pretreatment 6 The most informative test is full-scale anaerobic digestion, but even at full scale it is difficult to assess whether or not a pretreatment method increases biogas yield as there can be significant variation between dif-ferent biogas plants.

image: bine.info