Digastate, does it contain poisonous gas like slurry does?

[multi power]

Is it dangerous?

 

[The Son]

Yes H2S levels are dangerous when slurry is mixed, take all the precautions you would do with normal slurry.

 

[sjt01]

If it is properly digested, with almost all the gas potential exhausted, there will be no problem. Unless you know that, then treat it as undigested slurry. If properly digested, with digester oxygen levels at around 0.5%, then the H2S will have been turned into elemental sulphur by bugs.

 

[Brisel]

Is it dangerous?

Very. http://www.bbc.co.uk/news/uk-england-31599509

 

[Bob lincs]

I have a question relating to digestate if anyone can help , If being spread as liquid on bare land does it have to be incorporated and if so how quickly. Sorry to hyjack this thread .

 

[Brisel]

I have a question relating to digestate if anyone can help , If being spread as liquid on bare land does it have to be incorporated and if so how quickly. Sorry to hyjack this thread .

All I can find is this

There may be something in the new RB209 guide.

 

[Bob lincs]

Thanks , that's interesting .

 

[sjt01]

Very. http://www.bbc.co.uk/news/uk-england-31599509

That was not digestate, that was the biogas itself. We had to do a similar operation a couple of weeks ago, had a team with breathing apparatus (fully trained) and full working at height precautions. The digestate is very safe unless you drown in it.

 

[Brisel]

That was not digestate, that was the biogas itself. We had to do a similar operation a couple of weeks ago, had a team with breathing apparatus (fully trained) and full working at height precautions. The digestate is very safe unless you drown in it.

The biogas comes from the digestate. If you alter the conditions i.e. allow it to become aerobic again, will the H2S production cease?

 

[sjt01]

I have a question relating to digestate if anyone can help , If being spread as liquid on bare land does it have to be incorporated and if so how quickly. Sorry to hyjack this thread .

Apply with trailing shoe or better still injection. After dribble bar or trailing shoe then a light cultivation helps avoid losses. Splash plate just throws the nitrogen away as ammonia, losing you valuable nutrients and causing air pollution. Also much more chance of runoff

 

[sjt01]

The biogas comes from the digestate. If you alter the conditions i.e. allow it to become aerobic again, will the H2S production cease?

Digestate is digester contents from which almost all the gas has been evolved. Unless the digester has been overloaded (fed and discharged too rapidly), there is nothing left to produce gas from in digestate.

That is why I said above to make sure the digester is operated properly, then there will be no risk

 

[Jb4220]

I have a question relating to digestate if anyone can help , If being spread as liquid on bare land does it have to be incorporated and if so how quickly. Sorry to hyjack this thread .

How is the Digestate being applied? We spread with a dribble bar applying between 30/50m3 ha. Then followed by a sub disc with 12/24 hour period to try and make the most of goodies available in the Digestate

 

[Cowabunga]

Digestate is digester contents from which almost all the gas has been evolved. Unless the digester has been overloaded (fed and discharged too rapidly), there is nothing left to produce gas from in digestate.

That is why I said above to make sure the digester is operated properly, then there will be no risk

The risk is that it hasn't been operated properly, therefore unless tested and proven otherwise, the risk should be considered high at all times.