[Digestion] digestate from the AD to the storage tank (lagoon)

[Paul Harris]

G’day Marina,

 

You can use gravity flow if the digester outlet is above the lagoon. One of
the compromises with choice of digester design is that with an above ground
digester you have to pump effluent in but can drain by gravity compared to
an in ground digester where you can load by gravity but usually have to
empty by pump (unless you have a good slope available or are using a shallow
digester design.

 

You are right that the pressure will be close to atmospheric, unless you do
something to trap the gas.

 

Happy digesting,

HOOROO

 

Mr. Paul Harris, Room 202 Charles Hawker Building, Faculty of Sciences, The
University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph    : +61
8 8303 7880      Fax   : +61 8 8303 4386 mailto:paul.harris at adelaide.edu.au
http://www.adelaide.edu.au/directory/paul.harris

 

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From: digestion-bounces at lists.bioenergylists.org
[mailto:digestion-bounces at lists.bioenergylists.org] On Behalf Of Marina
Solanas
Sent: Wednesday, 18 May 2011 9:14 AM
To: digestion at lists.bioenergylists.org
Subject: [Digestion] digestate from the AD to the storage tank (lagoon)

 

Another thing we are studying, are the possibilities of taking out the
digestate from the AD to the lagoon.

We´d prefer not to use pumps to reduce energy consumption and investment
costs. Could we use gravity to take the substrate from the mixing chamber to
the digestor and from the digestor to the storage tank? i´m not sure about
the depth of ground water.

Thanks to all!

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