D01 Properties of digestates from anaerobic digestion: Nutrient and chemical characteristics

[@oluwasegunaina3092]

Thank you for presenting.

[@sustainablefoodproduction3213]

Thanks!

[@pje8244]

Very helpful and easy to understand for someone without a background in biology and science.

[@sustainablefoodproduction3213]

Many thanks for your feedback!

[@kyle-cv1qo]

Hi I’m looking at a biogas plant in Australia. I’m wondering if I can use whole crop wheat barley and ryegrass silage or hay to run a plant. Also if the digestate is applied with the seeding of the next crop to aid in germination will the nitrogen losses be to great?

[@alejandromoureabelenda]

As always, very informative video! How can we find you in other social media platform? (e.g. linkedin)

[@aussiefarmlife3366]

Really informative video Thank u I’m currently setting up an anaerobic digester on farm to treat and utilise the bi product of piggery waste My video series is very poor”only new on KZbin and just a farmer” But my question is.. if I am going to heat the digestate to boiling point (in order to remove pathogens) prior to anaerobic conditions will this affect the bacteria needed for methane production?

[@sustainablefoodproduction3213]

Hi. In the UK there are specific pasteurisation rules (time/temperature/particle size etc) for animal by-products. Some UK AD sites pasteurise in a separate unit before the AD and some after. Worth checking the rules in your country to see what is required. The main AD vessel will have the bacteria in, so adding a small amount of new feedstock which has been pasteurised and cooled should not influence the digester bugs too much. (of course provided that the feedstock type is the same as what is already in the digester, and it sounds like pig slurry is your thing, so more of the same). AD sites often inoculate the digester to start up the bacteria. Good luck with your project!

[@thangammanikandan7025]

Hi mam.. Very informative... Which is best practice for agricultre, using the digested slurry as whole or seprated liquer and fibre.... Could you please explain?

[@sustainablefoodproduction3213]

Hi. Thanks for your question. In the UK some AD sites separate the digestate into solid and liquid fractions and others use it whole. Farmers can apply the liquid digestate using one of the low emission spreading options I mention in my other video: kzbin.info/www/bejne/fZCkf3hmnbWXj7M Generally the solid digestate is applied to land using the same equipment as for manure.

[@oluwasegunaina3092]

Thank you very much. I would like to know how to calculate the fertiliser replacement value please.

[@sustainablefoodproduction3213]

Hi. In the UK we use RB209. Here's the link: ahdb.org.uk/knowledge-library/rb209-section-2-organic-materials

[@sanjaynsaigal]

Weather making of vermicompost from digestate better way to use it or using it directly?

[@sustainablefoodproduction3213]

Hi Sanjay. Interesting question. In the UK most of the digestate is applied to agricultural land. Some crop-based digestates are starting to be used in horticulture, including home gardening - check out my video on this for more details: kzbin.info/www/bejne/p2aQgaCVZrdnjcU

[@mosesmatte6899]

Hello Mary, This is very helpful, thank you. I am looking to blend manure, biochar and microorganisms in a fermentation machine to produce organic fertiliser. I am looking for guidance, mentorship, tutoring in this area, can you please point me in the right direction?

[@sustainablefoodproduction3213]

Hi. Thanks for your message. This sounds really interesting. Where are you based?

[@mosesmatte6899]

@@sustainablefoodproduction3213 Hello Mary, good to hear back from you. I am based in Kasese District, Uganda, East Africa. I work with a group of farmers and we are looking to overcome the vicious cycle of inorganic fertilizer usage by switching to organic fertilizers

[@evaandfriendsroblox2067]

What is the real solid fraction from a digestate I can get after liquid solid separation?

[@sustainablefoodproduction3213]

Hi, thanks for your comment. The photo you see in this video at 3 minutes, 20 seconds is the separated solid digestate fibre. I have more photos of the solid in my DH01 video - link here: kzbin.info/www/bejne/p2aQgaCVZrdnjcU at 6 minutes 30 secs and also at 11 minutes 30 secs. The appearance and colour of the separated solid fibre do vary depending on the feedstock and the separation system. More photos here: www.fullcirclegrowing.co.uk/bio-mulch