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<DIV><FONT face=Arial size=2>Hi All,</FONT></DIV>
<DIV><FONT face=Arial size=2>With regard to utilizing digestate as a crop
fertilizer, it is often stated the slurry is spread on fields with the inherent
problem of biological toxicity and crusting of surface
applications.</FONT></DIV>
<DIV><FONT face=Arial size=2>I believe this process is an incomplete and
basically a cheap and nasty means of disposing a potentially valuable
resource.</FONT></DIV>
<DIV><FONT face=Arial size=2>The addition of a 1.5% potassium hydroxide solution
of to the spent digestate enables a disassociation of the solid fraction
from the colloidal material. When the un-reacted and fibrous remains are
filtered from the treated mix and the resultant fluid is allowed to settle,
colloidal concentrate or fulvic acid will be found in the top fraction,
humic acid in the lower portion and carbon rich nutrient at the bottom.
</FONT></DIV>
<DIV><FONT face=Arial size=2>The increased pH also enables a stabilization of
biological activity within the fluids until dilution with
water.</FONT></DIV>
<DIV><FONT face=Arial size=2>These fractions are the most valuable components of
the AD process. The bio-gas is a bonus.</FONT></DIV>
<DIV><FONT face=Arial size=2>The fulvic acid is a supreme foliar fertilizer, the
humic acid is best suited to soil applications and the carbon mud is an
excellent binder for a wide range of solid crop fertilizer inclusions such as
rock-dust, blood and bone, etc, before pelletizing for broadcast
operations.</FONT></DIV>
<DIV><FONT face=Arial size=2>We are desperately looking for sustainable
solutions to chemical based crop fertilizers. Most agriculturalists are aware of
the folly of NPK reliance. </FONT></DIV>
<DIV><FONT face=Arial size=2>AD, like the composting of organic waste
materials provides all of the nutritional requirements for every form
of plant-life.</FONT></DIV>
<DIV><FONT face=Arial size=2>Recycling of crop nutrients via AD has the ability
to negate the detrimental effects of chemical agriculture, repair degraded
soils, help resolve salinity problems, increase nutritional food values of
crops, increase soil moisture holding capacity and put an end to the
contamination of precious waterways. </FONT></DIV>
<DIV><FONT face=Arial size=2>Simply dumping spent digestate on fields is a lazy
and mindless means for disposal.</FONT></DIV>
<DIV><FONT face=Arial size=2>Don't waste waste.</FONT></DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Peter. </FONT></DIV></BODY></HTML>