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Re: Heavy metals in activated sludge
I have heard that natural Zeoliths - a rather cheap material - could
bind heavy metals in such a way that they are not any more available to
plants and ground water. I don't know who has experience and which types
of zeoliths work.
Does anyone have experience in that fielod?
Joe Pringle wrote:
> Question from Exnora International in India:
> We have taken up composting of vegetable wastes from the Koyambe-
> du market in Madras, Asias's largest vegetable market. The
> Chennai Metro Water Supply and Sewerage Board has agreed to
> compost the waste by using the activated sludge from the sewage
> treatment plant in Koyambedu. But one important issue would be
> `How do you remove heavy metals in the sludge?' We have been
> writing to several people enquiring about this. Any ideas?
> please CC any responses to Exnora International at:
> or firstname.lastname@example.org