[Terrapreta] sewage sludge charcoal

[Gerald Van Koeverden]

and tiny concentrations of progesterone (similar to that left over in  
treated sewage) makes minnows infertile by changing all the maies  
into females...now that's birth control!

http://www.cbc.ca/technology/story/2007/05/22/science-minnow-cp.html

Gerrit

On 9-Apr-08, at 8:49 PM, Jim Joyner wrote:

> MFH wrote:
>>
>> So the reality seems to be that human waste normally has low  
>> levels of heavy metals and other nasties, and the sewage toxicity  
>> problem is caused by irresponsible householders and factories  
>> dumping anything and everything down the spout.
>>
> Max,
>
> There may be more than just this. For example in San Jose, one  
> year, a whole heard of cows seemingly went sterile at Stanford.  
> Turns out, since there were lots of women on the pill in the  
> college down, there was enough progesterone in the waste water  
> supply, that was being used for irrigation on grazing fields. The  
> cows were effectively on the pill (the example is not perfect since  
> this is the waste water). All manner of pharmaceuticals end up in  
> human waste. Some comes out in the processing, some doesn't. One  
> would think pyrolysis would take care of much of it, though.
>
> There is a growing concern that pharmaceuticals are showing up more  
> and more in the water systems. Some of this could be due to run off  
> from sludge.
>
> Jim
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