Technical Development of Waste Sector in Sweden: Survey
Technical Development of Waste Sector in Sweden: Survey
Technical Development of Waste Sector in Sweden: Survey
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
MASTER’S THESIS IN ENVIRONMENTAL STRATEGIES RESEARCH<br />
Hybrid<br />
Techno<br />
logy<br />
Pyrolysis<br />
Thermal<br />
processes<br />
Plasma Arc<br />
Bio-chemical<br />
conversion,<br />
anaerobic<br />
process<br />
Pyrolysis-<br />
Gasification<br />
Water gas shift, CO+H2O=CO2+H2<br />
Pyrolysis is a thermal process <strong>of</strong> MSW treatment<br />
technology.<br />
Unsorted MSW can be treated by pyrolysis process at 600-<br />
650 o C <strong>in</strong> absence <strong>of</strong> oxygen.<br />
<strong>Waste</strong> converted to the syngas and char from the process<br />
and combustion can be done sequentially.<br />
Reaction is taken as, C+H2O=CO+H2<br />
The system basically uses a plasma reactor which houses<br />
one or more.<br />
Plasma Arc Torches which generate, by application <strong>of</strong> high<br />
voltage between two electrodes. a high voltage discharge<br />
and consequently<br />
In an extremely high temperature environment (between<br />
5000-14,000 o C) wastes are oxidized. .<br />
Gas output after scrubb<strong>in</strong>g comprise ma<strong>in</strong>ly <strong>of</strong> CO and<br />
H2.<br />
The liquefied product is ma<strong>in</strong>ly methanol.<br />
High efficiency <strong>in</strong> energy recovery from waste.<br />
In MBT shredd<strong>in</strong>g followed by trammel separation,<br />
material recovery and biological (dry<strong>in</strong>g) treatment, and<br />
subsequent fuel preparation.<br />
Pre-digestion stage <strong>of</strong> heat<strong>in</strong>g to 70°C for one hour<br />
followed by mesophilic digestion at 35°C, or a<br />
thermophilic digestion process, operat<strong>in</strong>g the whole<br />
digester at 57°C.<br />
Pyrolysis-gasification is a hybrid waste treatment<br />
technology.<br />
Pre-dry<strong>in</strong>g <strong>of</strong> the waste and capture <strong>of</strong> the thermal energy<br />
uses a heat recovery steam generator (HRSG).<br />
The process converts MSW to useful energy <strong>in</strong> the form <strong>of</strong><br />
electricity.<br />
P-G has the higher efficiency <strong>in</strong> waste-to-energy<br />
conversion process.<br />
MSW Air Pilot<br />
Scale<br />
MSW Air Lab<br />
Scale<br />
MSW<br />
Multip<br />
le<br />
Pilot<br />
scale<br />
MSW Air Pilot<br />
level<br />
Limited Halton EFW<br />
Bus<strong>in</strong>ess Case<br />
(2007), Khoo<br />
Hsien H.(2009),<br />
Niessen W.R.<br />
(2002)<br />
Very<br />
Limited<br />
Limited<br />
Limited<br />
SWM Manuals<br />
(2000), Circeo,<br />
Circeo, Louis J.<br />
(2009)<br />
Greater London<br />
Authority (2003)<br />
Alternative<br />
Resources, Inc<br />
(2007), Feo et al.,<br />
(2003), Khoo<br />
Hsien H.(2009),<br />
(NSCA, 2002),<br />
(Malkow, 2004),<br />
(DEFRA, 2004)<br />
KUNGLIGA TEKNISKA HÖGSKOLAN 36 | P age