The particles stick to the surface of. As with a home worm system the worms eat their way to the surface. All worms typically used for worm farming are suitable for the treatment of sewerage Reds, Blues and Tigers. Considering this is a large scale set up the process is relatively simple and straight forward. The treatment of raw sewerage using worm farming is in use in many parts of the world. It has been said that treating sewerage using worms is so good it can actually produce drinking quality water through the treatment process.

More slurry as added and the process repeats. The worm castings become the filter medium for the slurry as it builds up. I have seen some commercial worm farms that have several windrows each being hundreds of metres in length and 3 to 4 metres wide. The standard operation uses a boom to trickle raw sewerage over large worm beds. As more and more local governing bodies become more realistic about respecting the environment, alternative treatment options are being sought worm farming is an obvious winner in this alternative approach.

Worm farming has been used to reduce waste in many commercial applications in addition to the increasing popularity of home worm farming.

Commercial use of worms for waste reduction requires a huge quantity of worms.