Thanks David, <br><br>Based on this information, it seems likely that the positive results we have been having with "direct" application of low-dose digestate has really has an intermediary absorption y evaporation stage as the digestate is applied to the soil or to the compost int he worm bed. Our results do not seem to show the following "collapse" of plants, but we have seen some impressive growth, particularly in forage plants. <br>
<br>Our current work is trying to establish application rates of digestate on different crops, with different timing etc. to formalize the use of the digestate as fertilizer to help promote the technology. We have been basing current application rates on macro-nutrient content (as compared to standard chemical fertilizer application rates), but we have seen that our results are far better than just macro-nutrient application would imply. We are digging deeper into micro-nutrients and biological factors to better understand these results. Next steps would be guides for adding minerals or other additives to the digestate to optimize it for different types of crops at different times in the crop cycle. We have a good base, but there are a lot of factors, so any existing work in this field would be really useful. <br>
<br>Saludos, <br><br>A<br><br><div class="gmail_quote">On Mon, Dec 5, 2011 at 9:23 AM, <a href="mailto:davidf@kingdombio.co.uk">davidf@kingdombio.co.uk</a> Fulford <span dir="ltr"><<a href="mailto:davidf@kingdombio.co.uk">davidf@kingdombio.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><font style="font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">Jim, Alexander and listers,
Biogas effluent straight from the digester is likely to contain hydrogen sulphiode, which is very poisonous and is likely to kill worms. It is always recommended that fertilizer be "matured" to allow such nasties to evaporate.
Absorbing the slurry in solid material for further composting allows such maturation. Some of the microbes in the slurry convert the hydrogen suplphide into sulphur in the presence of air. Leaving the slurry to mature gives them time to do this. Natural sulphur acts as a fungicide and also helps the soil.
Using effluent direct from the plant also allows ammonia to reach the growing plants quickly. They tend to grow fast and then collapse. Raw ammonia probably also has a bad effect on worms. Maturation without absorbtion allows the ammonia to evaporate. Absorbtion allows the ammonia to react with sodium or potassium in the dry material to form salts which are absorbed less quickly by plants and are less likely to affect worms.
Best wishes,
David F.
<br><br><font face="Tahoma, Arial, Sans-Serif" size="2"><hr align="center" size="2" width="100%"><b>From</b>: "Alexander Eaton" <<a href="mailto:alex@sistemabiobolsa.com" target="_blank">alex@sistemabiobolsa.com</a>><br>
<b>Sent</b>: 05 December 2011 14:53<br><b>To</b>: "For Discussion of Anaerobic Digestion" <<a href="mailto:digestion@lists.bioenergylists.org" target="_blank">digestion@lists.bioenergylists.org</a>><br><b>Subject</b>: Re: [Digestion] Digestate comparison to liquid worm castings</font><div class="im">
<br><br>Jim, <div><br></div><div>We have applied digestate from cows to the leading edge of the worm worm bin (where fresh waste goes) and we have not seen worms die or a reduction in their consumption. This was with low doses. We have never applied it directly onto worms, but it does not surprise me that it would kill them or have a negative effect. We are trying to determine whether or not worms will then destroy any pathogens or if the biol has a positive effect on the quality of the worm castings. We are two months in, with preliminary results suggesting a reduction in pathogens, and nothing definitive regarding quality based on high levels of fluctuation. </div>
<div><br></div><div>Best, </div><div><br></div><div>A </div><div><br></div></div><div><div><div></div><div class="h5"> <br><br><div class="gmail_quote">On Sun, Dec 4, 2011 at 10:58 PM, Jim McNelly <span dir="ltr"><<a href="mailto:jim@composter.com" target="_blank">jim@composter.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><br><br><div class="gmail_quote"><div><div></div><div>On Fri, Dec 2, 2011 at 1:46 PM, Wayne Zschech <span dir="ltr"><<a href="mailto:waynezschech@calvarychapel.com" target="_blank">waynezschech@calvarychapel.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div></div><div>
G'day All!<br><br>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.<br>
<br>Blessings,<br>Wayne<br>
<br></div></div>___</blockquote><div> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Have you actually tried to take the filtrate or digestate and feed it directly to earthworms? I have. It kills them within hours. You can analyze it all you want, but just do this one thing. Actually feed it to earthworms and see for yourself what happens.</blockquote>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br></div></div><div class="im">Alexander Eaton<br>Sistema Biobolsa<br>IRRI-Mexico<br>RedBioLAC<br><br>Mex cel: (55) 11522786<br>US cel: <a href="tel:970%20275%204505" value="+19702754505" target="_blank">970 275 4505</a><br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Alexander Eaton<br>Sistema Biobolsa<br>IRRI-Mexico<br>RedBioLAC<br><br>Mex cel: (55) 11522786<br>US cel: 970 275 4505<br><br><a href="mailto:alex@irrimexico.org" target="_blank">alex@irrimexico.org</a><br>
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