Unit 3.4: High Rate Systems

Background and Guiding Questions

A high rate system is defined as a system where liquids stay in the digester for a short period of time; whereas, solids are held longer.  This allows for a smaller reactor size, while maintaining high gas production.

Guiding Questions

  • What are examples of high rate digesters?
  • What are the advantages and disadvantages of a high rate digester?

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