DIG-L: Anaerobic granulation

["PRITCHARD, Sean" <PRITCHARDS@amylum.com>]

Dear all,

As an operator of a mesophilic industrial hybrid USAB reactor, on
carbohydrate waste, I was wondering if anyone has any up to date info /
references on ideal start up and operation conditions, with respect to
individual VFA's, to enable ideal promotion of granulation.  The theories I
know of talk of :
 a. high acetic, then low acetic conditions (de Zeeuw)
 b. acetic never greater than 200 mg/l (Wiegant)
to achieve the most stable granules.
Are these still acceptable and is there any more recent theories that add to
these or confirms these?

Regards

Sean Pritchard
Water Treatment Co-ordinator
AMYLUM UK LTD
Greenwich
LONDON
SE10 0PA

Tel. 0181 853 7200
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