Cleansing sewage water

I was looking for something else on the Web when I came across an account of Dean Cameron's invention for cleansing sewage and irrigation water.

It seems that 12 years ago Australian Cameron became interested in how cowpats decomposed, and how small creatures at the edges of streams broke down wastes. He wondered if nature had an answer to the simple cleaning of dirty water.

Three million dollars later, Cameron had devised a method, "Biolytix", of using worms and other organisms to break down the solid materials in waste water. This becomes a humus, which is then used as a filter to clean the water. Hence the problem becomes the solution, as my Infolink source comments.

Here is the main drawing from the Combination membrane/biqlytic filtration patent application, which was published in May 2007. 

  

The invention has won awards, and is considered a promising contribution towards a major problem. However, my source did not quite get it right when it said "It has the worldwide patent" on the technology. That's impossible as there is no such thing. The patent application is a request for a patent in numerous countries through the Patent Cooperation Treaty, but each country or regional patent system decides individually if the application is to be accepted.