Thanks for your kind words Asifo.

I had a few email exchanges with Uwe and here are some excerpts on
technical  matters. Comments and suggestions are welcomed.
regards
Jacky
_____

Uwe:
..our pastor is already pretty close to building his own house, and just
yesterday he mentioned the possibility of receiving some children in this
house, as soon as it's ready.That would also be a beginning, but shouldn't
be a reason to loose track of the big picture, which is developing a
sustainable form a permanent help and development of these children.

Jacky:
could you give me an estimate of how much wastewater would this house
generate per day from the kitchen and bathroom ? What are the plans to
treat sewage ?

Uwe:
...the pastor's family is 4 people; he, his wife and two little children
(1 and 2 years), though I have no idea how much an average person produces
in wastewater. But remember that in the future there will be the children
of the orphanage in the same piece of land, plus there are two neighbour
families (which donated the land), which I also would like to connect to
the digestor. They are another ten to twelve people with relatively
grown-up childen. And of course we also have to take into account the
future church with up to 100 people on sundays (maybe more in the future),
and about 20 on wednesday evenings. That's more or less the situation. Now,
how many liters of wastewater
produces an average person per day? 100 liters; 150? Unfortunately, I don't
know.
...(cut)......my plan is to biodigest the wastewaters, though I would like
to know if we could treat the greywaters apart, to recover them for
household uses (perhaps shower; I don't know if it's possible). As the idea
is to establish an IBS, my feeling is that biodigestion is obvious, so to
recover nutrients

Jacky:
>I have no idea how much an average person produces in wastewater
>check the water bill of some of your friends with
>children.....(cut)....Greywater is not rich enough to generate biogas.
>There is very little nutrients in it.

Uwe:
...total water consumption per person and day is about 400-500 liters
(which sounds high to me), and I don't know how many percent are discipated
as vapor. But these are the official numbers of our local water and sewer
administration. - The idea of treating greywaters apart was not so much to
take advantage of nutrients, but to hopefully clean the water enough to be
reused, perhaps in the shower and toilets. Water is delivered by truck to
the outskirts of our city, so it would be good to find ways to reduce the
consumption of "original water". That includes the possibility of a well,
water collection from the roof, and recycling, as far as reasonably
possible. Do you think that the last option is viable?