The characteristics of the hydrothermally treated products are
shown in Table 4. Since the results were prepared based on the
measurements conducted by an external company, the data range
is not presented. Samples A11–B21 originated from MSW-1,
whereas samples B22–C11 originated from MSW-2. B31 and C11
were centrifugally dewatered (labeled with an additional ‘‘d’’ character)
before being analyzed. It can be seen that the densities of
these products were higher, approximately 4–5 times than that
of the raw MSW in dry form. It was observed that higher reaction
temperature and longer holding period would produce denser
products. Owing to these results, it is predicted that 7580% waste
volume reduction by hydrothermal treatment can be achieved All product samples exhibited higher moisture content, but
almost equal heating values in the dry form than those of the
raw MSW (18 MJ/kg for cases A11B21 and 22 MJ/kg for cases B22C11), irrespective of the hydrothermal treatment conditions.
The heating values of the raw MSW and the hydrothermally treated
products were almost equal to that of low-grade sub-bituminous
coal (approximately 20 MJ/kg [18]). Thus, it may be possible
to use the hydrothermally treated products as solid co-firing fuel
with coal.
The characteristics of the hydrothermally treated products are
shown in Table 4. Since the results were prepared based on the
measurements conducted by an external company, the data range
is not presented. Samples A11–B21 originated from MSW-1,
whereas samples B22–C11 originated from MSW-2. B31 and C11
were centrifugally dewatered (labeled with an additional ‘‘d’’ character)
before being analyzed. It can be seen that the densities of
these products were higher, approximately 4–5 times than that
of the raw MSW in dry form. It was observed that higher reaction
temperature and longer holding period would produce denser
products. Owing to these results, it is predicted that 7580% waste
volume reduction by hydrothermal treatment can be achieved All product samples exhibited higher moisture content, but
almost equal heating values in the dry form than those of the
raw MSW (18 MJ/kg for cases A11B21 and 22 MJ/kg for cases B22C11), irrespective of the hydrothermal treatment conditions.
The heating values of the raw MSW and the hydrothermally treated
products were almost equal to that of low-grade sub-bituminous
coal (approximately 20 MJ/kg [18]). Thus, it may be possible
to use the hydrothermally treated products as solid co-firing fuel
with coal.
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