Environmental Engineering Reference
In-Depth Information
Table 1 MSW composition in different level of country
'
s incomes
Physical composition
(wt%)
Country
'
s income levels
Low
income
Lower middle
income
Upper middle
income
High
income
Organic waste
64
59
54
28
Paper
5
9
14
31
Plastic
8
12
11
11
Glass
3
3
5
7
Metal
3
2
3
6
Others
17
15
13
17
Table 2 Physical
composition of mined MSW
for different size distribution
Physical composition (wt%)
Size distribution
25
-
50 mm
>50 mm
Soil-like material
47.3
14.0
Plastic
14.5
34.3
Textile
3
10.5
Wood
4.5
10.7
Paper
2.8
4.3
Rubber
0.8
5.8
Foam
0.8
1.2
Ceramic
9.2
3.0
Glass
10.3
7.5
Metal
5.3
8.3
Battery
1.4
0.4
than the acceptable heating value of MSW for thermal treatment technology (at
least 7 MJ/kg) (World Bank
1999
). Gasi
cation technology coupled with gas
engine is one of the solutions to recover mined MSW to green and clean energy
compared to conventional direct combustion integrated with steam turbine because
it has high electricity production ef
ciency (30
40 % for gasi
cation compared to
-
15
25 % for direct combustion (BioenergyNet
2014
). Since the mined MSW is
non-homogeneous with high size and composition variation, it is not suitable to be
directly used as feedstock for gasi
-
cation technology, the mined MSW has to be
prepared into the homogenous form. This study aims to conduct the feasibility
study of using reclaimed waste from land
ll for power generation in a 50 kW
downdraft gasi
cation system and to optimize the operating condition for power
generation in continuous mode. The downdraft gasi
cation technology is selected
in this study because it has the following advantages (Obernberger and Thek
2008
;
Belgiorno
2003
; Knoef
2005
; WIRC
2006
):
Search WWH ::
Custom Search