Biorefineries using waste – production of energy and chemicals from biomasses by micro-organisms - Biomass as Energy Source: Resources, Systems and Applications - page 237

Figure 13.1. Biorefinery process.
13.4.2 Air and water pollution diminished by natural processes
Biorefinery industries need to be established in the proximity of biomass sources. These often
are various waste sentiments, sludge, surplus disposals or the overflow or outcome of different
treating plants. By handling the organicmaterials, biorefineries improve the environmental quality
as the waste fraction is dealt with according to the schematic flow presented in Figure 13.1.
13.5 TRANSPORT OF FUELS AND CHEMICALS LESS ABUNDANT AND RISKY
WHEN LOCAL SOURCES ARE EXPLOITED
Oil is one of the greatest harms from the environment's point of view: it is a non-renewable
natural resource (Välimäki, 2005). Oil drilling spoils environment in ecologically sensitive areas.