JF Mezei wrote:

On 2016-11-27 18:14, William Mook wrote:

Since the anaerobic digester is likely to weigh more than 2.03 kg its inclusion in the process is a net negative.


Fair enough. But since there will have to be some sort of sceptic tank
somewhere, the weight of that digester is mostly already there on the
ship. Unless the toilets vent to space.


You don't need a 'sceptic tank', or even a septic tank. You need
sanitary holding tanks, which are much smaller. You need a
desiccators to recover the water, which is much smaller. And you need
a closet to store the waste in. The 'digester' is additional
equipment.


And if you wish to extract the water from the waste, then you also need
some sort of a tank and whatever hardware to extract the water from it.

So what if the same hardware gets water and methane from waste?


So what if there's magic pixie dust?


also you mentioned anaerobic digester. Aren't aerobic ones far more
efficient ?


Do you really want the entire ship to smell like ****e?


As a side question: of the ECLSS systems tested on the station, are all
of them scaleable to support 100 pax? Would this be done by growing
them or just installing many system of current sise ?


I'd expect a different system.


(pax is standard abbrev for "passenger" for those who don't know).


Standard for whom? It can mean lots of different things. Just type
'passengers' and stop trying to sound smarter than you are.

PAX could mean Passengers, Personnel, Paired Box Gene, Paxon
(Network), Patuxent River Naval Air Station (Maryland), Private
Automatic Exchange, Penny-Arcade Exposition (video game convention),
Portable Archive Exchange, Per Annum Exclusive, Potassium Amyl
Xanthate, Programming, Administration and Execution System (US Army),
Poly Aluminium Chloride, Picatinny Arsenal Explosive, Profiling Agent
for Exchange, Passenger Assistance Required (VRE), Per Annum Exchange,
or Professional Autocrossers. There are probably others.

Like I said, if you mean 'passengers', just type 'passengers'.


--
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn