Environmental Engineering Reference
In-Depth Information
2.7 Lemvig Biogas plant (source: Lemvig Biogas, Denmark).
permitting procedure therefore have to be considered. This depends on local
legislation and regulations.
Dedicated characteristics of the site include the suitability of the soil for
construction as well as the topography of the site. In general, construction
(e.g. digesters, generator house) requires level surfaces but in some cases
sloped properties can be beneficial for insulation purposes of the biogas
digesters or for pumping the substrate. Sites exposed to risks of earth or
snow slips must be avoided. Sites with a high groundwater table and/or the
potential for flooding must be evaluated. Leakage from feedstock storage
facilities to natural water bodies or groundwater should always be avoided,
especially in protected groundwater areas or drinking water catchment
areas. The main wind directions should be considered if neighbors are close
to the facility due to odor nuisances. Figure 2.7 shows a panorama image of
the location of Lemvig Biogas Plant, Denmark.
Access to infrastructure has been mentioned already in relation to road
access. Other infrastructural requirements concern access to the electricity
grid and/or to the natural gas grid in order to reduce high connection costs.
This applies to both biogas plants selling electricity or injecting methane
into the natural gas grid. Access to drinking water supply and to sewerage
systems may be needed, in case wastewaters (e.g. from cleaning tanks and
trucks) cannot be treated in the biogas plant. For biogas plants using the gas
for electricity production, it is important to locate the plant close to
potential heat users (local industries, greenhouses, households, etc.).
Utilization of excess heat from the production of electricity has an
important contribution to the economic sustainability of a biogas plant.
Finally, a biogas plant requires public acceptance, especially if it is located
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