Environmental Engineering Reference
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Figure 6.11. Visual comparison of substrate with two HTC products (Krüger, 2011).
Figure 6.12. Carbonization diagram of substrate and products (Belusa et al. , 2009, modified).
The presented results clearly show that organic waste fractions are suitable substrates for the
HTC production, mainly in terms of producing an energy carrier. Other effects like soil improve-
ment due to the forming of Terra Preta have not been taken into consideration yet; nevertheless
all imaginable strategies should be taken into account and the best option, even besides to energy
utilization strategies, should be chosen for full-scale implementations. Aspects of the future
work on the matter of HTC from organic waste fractions include the identification of applicable
technologies for either pilot or full scale applications under consideration of life cycle analysis
and economic feasibility.
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