[Terrapreta] sewage sludge charcoal

[lou gold]

Gerritt,

Seems like you are mixing 2 sewage streams that are in fact separate. Toilet
waste is separate from sewer waste.



On Wed, Apr 9, 2008 at 10:00 AM, Gerald Van Koeverden <vnkvrdn at yahoo.ca>
wrote:

> What's the problem with sewage sludge?  Folke has a very good point!
>
> "Problems associated with the agricultural use of sewage sludge include
> groundwater, soil, and crop contamination with pathogens, heavy metals,
> nitrate, and toxic and carcinogenic organic compounds.*34*<http://weblife.org/humanure/references.html#5_34>Sewage sludge is a lot more than organic human refuse. It can contain DDT,
> PCBs, mercury, and other heavy metals.*35*<http://weblife.org/humanure/references.html#5_35>One scientist alleges that more than 20 million gallons of used motor oil
> are dumped into sewers every year in the United States.*36*<http://weblife.org/humanure/references.html#5_36>
>
> America's largest industrial facilities released over 550 million pounds
> of toxic pollutants into US sewers in 1989 alone, according to the US Public
> Interest Research Group. Between 1990 and 1994, an additional 450 million
> pounds of toxic chemicals were dumped into sewage treatment systems,
> although the actual levels of toxic discharges are said to be much higher
> than these.*37* <http://weblife.org/humanure/references.html#5_37>
>
> Of the top ten states responsible for toxic discharges to public sewers in
> 1991, Michigan took first prize with nearly 80 million pounds, followed in
> order by New Jersey, Illinois, California, Texas, Virginia, Ohio, Tennessee,
> Wisconsin and Pennsylvania (around 20 million pounds from PA).*38"<http://weblife.org/humanure/references.html#5_38>
> *
>
> For the complerte chapter, go to:
>
> http://weblife.org/humanure/chapter5_10.html
>
> Gerrit
>
>
> On 9-Apr-08, at 5:11 AM, MFH wrote:
>
> Folke
>
>
>
> Hang on. The Chinese in particular have been using human waste in
> agriculture for thousands of years. What's different to their poo?
>
>
>
> M
>
>
>
>
>  ------------------------------
>
> *From:* terrapreta-bounces at bioenergylists.org [
> mailto:terrapreta-bounces at bioenergylists.org<terrapreta-bounces at bioenergylists.org>]
> *On Behalf Of *Folke Günther
> *Sent:* Wednesday, 9 April 2008 6:45 PM
> *To:* 'Michael Antal'; 'Terra Preta'
> *Subject:* Re: [Terrapreta] sewage sludge charcoal
>
>
>
> Raw sewage sludge should *never*, under any circumstances, be used in a
> process involving soil that will be used for food production, because of the
> high content of heavy metals.
>
> I agree that the charring might destroy (or spread out?) some of the
> otherwise organic noxious stuff, as medicals and the like.
>
> Thus, if you make char of it, you have to put it in abandoned mines or the
> like, which implicates a loss of phosphorus.
>
>
>
> Much better is to use source-separating toilets, add the urine to char,
> possibly char the faeces, and then put it in the soil.
>
> It is the "purification" process that destroys this otherwise excellent
> nutrient stuff.
>
>
>
> -------------------------------------------------------------------------------
>
>
> Folke Günther
>
> Kollegievägen 19
>
> 224 73 Lund, Sweden
>
> home/office: +46 46 14 14 29
>
> cell:               0709 710306  skype:  folkegun
>
> Homepage:     http://www.holon.se/folke
> blog: http://folkegunther.blogspot.com/
>
>
>   ------------------------------
>
> *Från:* terrapreta-bounces at bioenergylists.org [
> mailto:terrapreta-bounces at bioenergylists.org<terrapreta-bounces at bioenergylists.org>]
> *För *Michael Antal
> *Skickat:* den 9 april 2008 00:45
> *Till:* 'Terra Preta'
> *Ämne:* [Terrapreta] sewage sludge charcoal
>
>
>
> I am pleased and somewhat surprised to report that raw sewage sludge is a
> good feedstock for charcoal production.  Details are available on the HNEI
> website below.  Regards, Michael.
>
>
>
> Michael J. Antal, Jr.
>
> Coral Industries Distinguished Professor of Renewable Energy Resources
>
> Hawaii Natural Energy Institute
>
> POST 109, 1680 East-West Rd.
>
> Honolulu, HI 96822
>
>
>
> phone: 808/956-7267
>
> fax: 808/956-2336
>
> *www.hnei.hawaii.edu*
>
>
>
>
>  ------------------------------
>
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