Three reasons:

  1. a saving on expenditure on waste processing and feed,
  2. an additional source of income through the sale of the frass
  3. an additional educational attraction

How so?

  • Zoos have many residual flows, mainly manure. Processing the manure is a cost item that can possibly be scrapped.
  • Manure is the natural food for the larvae of the Black Soldier Fly.
  • Zoos can collect the manure and organic waste from the restaurants and process it into a nutritious mush.
  • It can be placed on an insect breeding machine and consumed by the larvae of the black soldier fly.
  • The grown-up larvae are then fed alive to reptiles, monkeys and all kinds of birds.
  • This can be seen by the public: a wonderful educational attraction that shows how circularity works in the tropics and that the zoo also practices circularity.
  • Working circularly is a form of Corporate Social Responsibility

Barrier

However, there is a legal bump before the above can be realized. This hurdle goes back to the fact that in the European Union larvae are defined as farm animals. See here for the discussion.

What is needed?

Click for further information: What is needed at the start of automated insect breeding for zoos?

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