[Digestion] Digestate comparison to liquid worm castings

Anand Karve adkarve at gmail.com
Sun Feb 26 00:25:31 CST 2012


Dear wayne,
while going through old unread E-mails I discovered yours. In the case of
both the types of manures (vermicompost and biogas effluent), the minerals
come from the biomass itself. The organisms involved in the process
primarily remove the carbon from the biomass, leaving the minerals
behind. There is another process, which actually adds water soluble
minerals to the compost. In this process, biomass is composted by layering
it alternately with soil. In this process, the biomass serves as the carbon
source for the micro-organisms in the soil. With such an abundant supply of
organic carbon as food, the microbes absorb minerals directly from the soil
and multiply their numbers. The resultant microbial biomass has more
minerals in it than the minerals in the original biomass, and because the
minerals form a part of the microbial cytoplasm, they are easily dissolved
in water and therefore become easily available to plants growing in the
field.
Yours
A.D.Karve
On Sat, Dec 3, 2011 at 3:46 AM, Wayne Zschech <
waynezschech at calvarychapel.com> wrote:

> G'day All!
>
> I know that the quality of the liquid digestate as a fertiliser depends on
> the type of feedstock ingredients. However, as a generalisation (or with
> specifics) how does our liquid digestate compare to liquid worm castings?
> Is the digestate even close to the 'potency' of the worm castings?  Also
> when comparing the standard NPK values of inorganic fertiliser is there a
> rule of thumb that allows digestate to 'compete' with them even though the
> NPK values are much higher in the inorganic fertiliser?  This will help me
> in talking to farmers when talk about the benefits of our product as
> instead of fresh manure or chemicals.
>
> Blessings,
> Wayne
>
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>


-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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