STENAU, GERMANY

The Stenau process is based on the work carried out at the University of Tubingen. There is little information about technical aspects of the process other than a rotary kiln is used to slow pyrolyse refuse/MSW at fairly low temperatures to effect partial liquefaction at a capacity of 1 t/day refuse (66, 67). The performance is summarised in Table 5.13. A flowsheet is given in Figure 5.12 (68). The liquid

yield is about 31% weight on dry MSW feed with 71 m3 off gas per tonne feed, some of which is used for process heat, and a solid residue of 56% wt on feed.

Table 5.13 Summary of the Stenau Process.

Feedstock throughput (d. a.f.) 1 tonne/day

Liquid product yield 0.309 tonne bio-oil/tonne feed

Gas product yield 71 m3/tonne feed

Solid residue yield 0.56 tonne/tonne feed

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