I have recently been skimming over and gradually deepening my understanding of the eco-industry’s opportunities in he field of P-retrieval from wastes.

As far as I can see, there is no problem on the whole with livestock, especially in organic husbanding, however, human wastes suffer from high levels of contamination, especially in ‘developed’ Nations, where our intake of pharmaceuticals – I am specifically referring to oestrogens and progesterone, in contraceptives, but a bewildering range of man-made ‘biopharmas’may be included – some heavy metals and, almost universally, sodium chloride (salt).

Naturally, in a self-sufficient setting, where a single family may be involved, this isn’t going to be a huge problem, but where we begin to consider mass processing of sewage sludge, it could be. Sodium chloride is a particularly intractable problem, as far as I can see, as methods involving reverse osmosis, charcoal filtration, solar distillation etc., will also result in filtering out the precious NPK (Nitrogen, Phosphorus and Potassium).

I wondered whether Dr Todd & Son have come up with cost-effective methods to separate out the chloride and other undesirables?

Best regards to all.

We were recently invited to write the chapter on remineralization for a book on DVD called the Green Disc that was given to all delegations at the UN Climate Summit In Copenhagen and was sponsored by a committee at the UN.

Please consider becoming a member, making a contribution and in various ways joining forces with us and our mission. Please feel welcome to contact me at Jcampe@remineralize.org to see how you can make a difference! Thank you for your support.

Joanna Campe
Executive Director, Remineralize the the Earth

We do – it’s called changed grazing management and soil carbon.

Please take a look at the presentations on http://www.soilcarbon.com.au to learn more.