| 摘要 |
Toxic wastes and other contaminants are removed from soil in a stationary retort (10, 110) where the soil is agitated and brought into contact with the retort walls (11, 111, 111A) (at a temperature preferably above 500 .degree.C) to cause the wastes or contaminates to be desorbed. The "off-gases" may be mixed with air/fuel in a combustion chamber (31, 131), to heat the retort; may be burnt in a secondary burner (40) to preheat and/or dry the soil feed; or be condensed in a condenser (41) and stored.
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