[Digestion] enzymes or bacterial feedstocks

[Michael Smith]

  I see that some companies are selling compounds that rapidly break down wastes without the general temperature ranges that have been suggested in typical systems around the world. Are there any that can be used as starters and will continue if fresh organics are periodically added? 
 My interest is to use the solids in gardens without the fear of soil contamination from the chemicals used as the starter. 
 Do the septic enzymes work in an anaerobic environment? 
 Am I chasing the wrong system mechanics?
I am not planning on any municipal waste.