Hi marc,
Thursday, May 11, 2000, 10:05:45 PM, you wrote:
man> One of the most common ways to process waste is to use a
man> process called activated sludge. It is primarily an aerobic
man> process.
Sludge consists primarily of the dead bodies of aerobic bacteria.
man> Another process commonly that has been in use for a long
man> time is the "digester" and is a anaerobic process.
For that reason (aerobic bacteria reproduce 9 times more), much less
sludge is produced. Gas is produced.
<snip>
man> Lagoon systems are a mixed mode aerobic/anaerobic system
man> that uses various micro and macro organisms in a quiescent
man> environment to handle the sewage (whatever it may consist
man> of). It is energy cheap but requires huge areas as it has no
man> man made energy input so relies on passive nature processes
man> to get the job done. These are common in small communities
man> and farms.
Newer systems are available that are not space intensive use a
fluidized-bed, upward flow reactor and combine anaerobic, anoxic and
aerobic processes. As mentioned earlier, these are patented
processes that while not cheap to install, have low operating costs,
do not require aerators, generate energy and do not release noxious
gases.
Older Imhoff type tanks can be adapted w/ a 20% on installations
costs.
DH
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