mrsbrown: (Default)
 I need to write up the talk I gave, and I'd really like to set up a Human Sanitation specific blog.  but it's feeling like a big task so I'm just going to tell you about the first part of my talk and tomorrow I'll tell you about the second part and maybe by next weekend I'll have enough content that a blog won't look too silly.

Pre-History
When I started this research I thought that prehistoric people didn't shit in their own caves.  I was wrong.

I think someone linked me to an article about  Hind's Cave.  It's a cave used by a family grouping in Mexico as one of their regular stops on their hunter-gatherer lifestyle.  The cave was in continuous occupation for about 8000 years.

This picture shows a drawing of how they lived and where they went to the toilet.
Hinds Cave layout


See?  The latrine is right next to the sleeping area.  I guess at night no-one wants to go far for a wee - the first ensuite bathroom?  It makes sense -  when I'm camping it's a miracle if I make it more than 10m from my tent (unless there are lots of people around and I use my chamber pot).
mrsbrown: (Default)
 Tasks for this weekend;

finish the script for my toilet talk (to be presented on Monday arvo)
agonise about what to wear for the talk, the galah dinner and the recovery Tuesday
pack before Bash so I can catch a plane on Sunday evening
work out the best way to get to my hotel at 10pm sunday night (Haymarket for the hinters amongst you) I give up, taxi it is.  900m in the dark when I'm tired is too far.  Note for next time: insist on an hotel nearer public transport.
MAYBE set up that wordpress site with toilet info and links to go with my talk

make more buttons
sew buttons on the new gambeson
set up the points on the new gambeson
pad my elbow cops
shorten the hose to suit my pourpoint

It's a good thing the weather is so good for sitting on the couch sewing and watching telly.
mrsbrown: (Default)
In March I get to stand up in front of 300 or so of my professional peers and talk about shit. The brief is to make people think. They're after"a sincere but engaging delivery – minimal text, mostly images, humour encouraged. "

And what can be funnier than taking 15 minutes to talk about poo?

Here's the abstract I submitted:

 

Composting of both food and human waste. As an ESD consultant it seems to be the final frontier. We have lots of conversations about energy, water and indoor environments, but not much about minimising or dealing with our waste outputs. It’s often seen as too yucky, or something that polite people don’t talk about but it’s a fundamental of civilised life. Great civilisations in history didn’t get great until they had dealt with large scale sanitation issues.

The topic would be introduced by a review of city wide sanitation through history: Romans, Medieval, Tudors, Victorians, Edwardians and developing countries today. Then, using these examples from the past, combined with the technology of the present, I would review the opportunities and alternative design solutions to examine how we could realistically transport and process human waste within the constraints of the modern apartment or office building

Brain dump of stuff I want to talk about/check the facts on/find pictures to illustrate:

History: prehistoric people don't shit in their own cave, romans used water to transport poo, people in castles poo'd out the window and got other people to clean up their mess, uses for poo and wee, Lonsdale St and other cesspits, how it worked when I was a kid - the dunnyman, the impact of sewage systems on city design, 3 hole privies,  fertilising fields with poo,

Health: how people dealt with poo and then got sick, miasma, cholera, worms,

Modern:
1930's instructions on how to use a flush toilet, african country that's buying urine off people to encourage them to use state built composting toilets, Chrischurch and disasters in modern countries that are worse than they need to be because we rely on electricity to pump our poo, Indian women who have to walk for 10min to find somewhere safe to poo, Natural Event and their work at festivals and Haiti, My composting toilet setup, pics of poo compost after 12 months,

Biological process stuff: wee is almost always hygienic, poo doesn't smell bad if it's dry, Leave poo on its own/with a carbon source for 12 months and its pathogens are gone. How much poo does a human make in a year? Can you mix poo and vegetable composting? Don't mix wee and water.

Imagining buildings and cities without a water based sewage system
; How much poo storage do you need for an apartment building to process its own waste? What about an office building? What can you do with the urine? What about collection systems - bring back the dunnyman? What does a modern bathroom with composting/collection look like? Do you need a service corridor like the laneways of old? What about cleaning? urine separating toilet pedestals. Can you use a compost tumbler in the basement to reduce the volume for transport - how big does it need to be? what to do about urine salts.  Using historical methods in a modern city. Resilience.

Whew!  I'll probably think of more.  I'll add that later.  For now I can console myself that I've started.


mrsbrown: (tent)
When using the closed bucket method they fill up faster.  It might be worth setting up a nearby trench with screenings and AG pipe so they can drain continuously, or else drain them off during the event so I don't have to make more buckets.

110 people filled about 4 buckets as planned, except some were more popular, so we had to change two of the buckets.  There are now two half buckets which will be used during the year and 3 buckets to leave until next year.

To increase the oxygen available to the standing buckets I've unscrewed the lids.   Anyone in that shed should be a bit careful.

When I opened the taps the liquid gushed out at higher pressure than I expected.  Except for one of them.  The tap is probably blocked.  I guess we'll find out what happens when you leave the liquid in.  It's the one with a lump of wood on the lid.  I put extra sawdust in it.

Pissoires for all are fabulous.  Next year we'll install more and put them in every paddock.  They're easy and minimally disgusting.  Need to find more commode chairs.

It would be good to have stickers on the barrels so I can write notes, or even numbers so I can tell them apart.

Edit: 

The women's pissoir needs work.  I think a panel of some sort on the commode chair would be good.  When we added a platform to the front of the commode my knees went higher than my pelvis and I pissed on the platform.  The tilt was better when my legs dangled.    Maybe we should have just lowered the chair and reduced the distance between the seat and the bale?

mrsbrown: (Default)
We didn't buy ceiling fans :(  I miss them already.

We didn't rearrange the TV corner, or buy a TV.

Ms NotaGoth got her licence

Ms NotaGoth announced her return to school - probably.

Rose's room is still too hard to play in - except if you're a small girl who wants to try on every dress in the bag of clothes we were given by my cousin.  3 so far tonight and counting, I think  I've seen about 10 on the floor - how many does she need?

We've failed in expanding Rose's gender stereotyping.  When Sneetch wore one of Rose's butterfly hair clips her major objection was that boys aren't allowed to wear pink!

The kitchen building has started!  We have wood and most of a wall.

The composting toilets are most of the way to completion.  The boxes are made, the containers obtained.  Now I just need to install taps and some aggie pipe for oxygenation and drainage.  Also, obtain large quantities of sawdust and sort out placement and privacy screens.

aaargh!  hot!  and work tomorrow!  aaargh!

Progress!

Dec. 29th, 2009 06:17 pm
mrsbrown: (Default)
Despite having to cancel building today due to a lack of wood, we have made progress.

We have 8 containers to make composting toilets from.

Also a box of mango and a box of strawberries - ice cream or drying?

Now to catch up on my lying on the couch.

mrsbrown: (Default)

Yesterday, while doing some more research on composting toilets, I came across the EPA approval for the toilets used at Rowany Festival.

Handy!!  It includes a description of how they arrange their bins and also how they deal with leachate.

Based on that, I'll put taps on the bases of the containers, but keep them closed until after the event.  Then we'll work out the right place to store them, dig a leachate trench in accordance with the Australian Standard for composting toilets, and drain them later.

btw current plan is a toilet in each of the dormitory paddocks and a male and female urine only service in the kitchen paddock. 

I need to provide storage for about 210 litres of waste - I could do this with 2no 120Litre bins, which are 980mm high to the top of the handle.  This will mean that the seat will be about 1m above ground level and we will need 2 steps to get up to them.



mrsbrown: (Default)

According to the BCA, we probably need about 1 toilet per 20 people, so 5 toilets for 100 people.

According to this site, people produce about 520ml per person per day, including the "dry matter" (sawdust) required.

I like this bucket technique - the buckets have good firm lids (they make great nappy buckets), they are light enough to carry when full, and the resulting toilet is a standard sitting height.  OTOH, I can only find white buckets in Australia, so it's really obvious what's inside.  A dark internal colour is recommended.  There's another good description of this method here.

Those buckets are advertised on ebay and are 20litres each.  You don't want to fill them more than 3/4 full, so each bucket will be enough for 30 people each day.  For 100 people, for 5 days (being generous), I would need to collect 17 buckets.  Need some extra buckets for sawdust, so 30.  This will also provide buckets to be demolished to fit toilet seats.

Alternatively, there are a number of people selling larger plastic barrels with lids.

Ceres sell worm bins.  When I looked at them, they had aeration holes on the side, and a tap at the bottom.  That could be useful for the "store for 12 months option".  Because I think we need to drain the leachate into a trench.  The bucket method above relies on an open compost system to provide sufficient oxygen.

Ideally, we would use a container with a piece of mesh steel in the bottom and a tap to drain leachate.  Over the mesh we would put several layers of newspaper and some sawdust.  The container would be large enough that it doesn't need emptying or moving for 5 days. The seat  would sit on top of the container and would be at using height without needing steps.  Everybody using it would be amazed that it doesn't smell and remember to both cover their deposit and close the lid. The container would have a pipe with holes in it that won't clog but will allow for oxygen to get into the pile. When full, the container would have a tightly fitting lid with a few more, insect proof, holes.  It will be small enough that it's easy to move. In a years time we would open the lid and empty the pathogen free [1], non smelly humus into a trench which we would cover with 100mm of dirt for further aging and/or use as fertiliser.  And the process would start again.

[1] Actually, according to my reading, you don't need perfect composting conditions to achieve pathogen free in 1 year.  That just happens with time.




mrsbrown: (Default)
Firstly, HAPPY BIRTHDAY [livejournal.com profile] astemudfoot!!!

Secondly, I've spent some time researching toilets and I'll try to put it behind a cut but I'm at work and don't have a client.

more about composting toilets than you want to know, but not me )
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