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Unlike more traditional
processes for manure biogas which normally takes a two-stage acid and other
methanogens, which are rather more acid pH, the nopal is processed only
slightly acid pH 6.5-6.8 and in one step since the time the material is
inside the reactor is very short, it makes inappropriate an expensive
stainless steel reactor, since it is only necessary to coat the inside with
epoxy or other plastic type every two years for good maintenance.
On the other hand, the design lines are implemented with equipment purchased
in the local industrial market and in common use.
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