For incinerating small ...

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For incinerating small amounts (~1.5 tonnes daily), consider a scaled up rocket stove. These have one advantage that they'll burn bio-mass, without giving smoke. Further, such incinerators could be built locally, using available clay materials. Examples can be seen at:  http://tzenvirohealth.wixsite.com/ceramics

Consider additionally, searching for answers among those concerned about disposal of medical waste. They have a particular problem with that portion of their waste that's hazardous, but I'm supposing that for the applications of which you speak, this is not the situation.