Introduction to Urban Sustainability

Posted by admin on December 25, 2008
Introductory Posts

This is the first blog post in what we hope will be a long-running and regularly updated blog about Urban Sustainability. So, for starters:

What is Urban Sustainability?

“This image was taken in downtown Portland to portray the mixing of mother nature and man made elements.”

Urban Sustainability is living within your means and capabilities inside the often densely crowded urban environment that most humans now inhabit. It means not depending on one source for all of your very critical needs on a day to day or month to month basis. It’s a diversification of your asset streams where the assets in this case are food, water, tools, and other daily/weekly/monthly necessities. It’s a different way of looking at your interaction with the world. It’s a hardening and bolstering up of your lifestyle so that your existence can be called robust and stable in this often chaotic and turbulent financially driven world.

Those are all fine and ideal phrases, but the practical meaning of Urban Sustainability is being able “to do for yourself and your loved ones.” That’s it. That simple. That pure. If you loose your job tomorrow, can you still bring food to the table? If after loosing your job, the lawn-mower breaks, will you be able to fix it or improvise a solution? Can you provide pure water for your family if a municipal line breaks or if the whole plant goes down? What about if your country spirals into a massive depression that lasts for a decade and you can’t find solid work for 5 years?

“Image gathered from public domain. Photo of the earth from space”

Sure, these are worst case scenarios, but lets bring it a little closer to home. How much of your monthly income goes to buying those things you need to survive on a day to day basis? We are talking food and water. How much? If you are like us, then it isn’t as much as your shelter but it is the next biggest thing. It eats into your income and saps your buying power. You spend maybe a third of your work life making sure you have food and water. Unfortunately, that’s money that is gone…you eat it up and…well, you get the picture. Not only is it dangerous to be reliant on one source for these basic and vital needs, it just doesn’t make economic sense. If you could provide a substantial portion of your own food and water for yourself and not have to pay anything but an initial investment for it, then why wouldn’t you? It just makes good sense.

So that’s what Urban Sustainability is about. It’s being able to support yourself within the constraints of your environment on a continuing basis. We don’t live in the woods and neither do most people we know. We aren’t hippies but we like to make things that are useful, fun, and educational. We think the environment is important for a very selfish and egotistical reason…we live here and we would like to continue! Further towards the point, it is not feasible in this day and age for all of us to live like hunter-gatherers. There just isn’t enough room, much less enough people who actually want to live that way. We want to live in our urban settings, next to our conveniences and amenities but not rely on them. We want to have our cake and eat it too!

“Yours truly, the creators of this blog…. P&S  or S&P.”

Now, who are we? “No one really special” is the short answer. Our names are Pam and Stan. We live in Portland, Oregon. Pam is a Structural Engineering Assistant at a small company. She just graduated from college with her B.S. in Civil Engineering. Stan is a Mechanical Engineering student at Portland State University. We are younger, both in our twenties, and are full of enthusiasm for this sort of project. We think we bring a unique skill set to the table and we will attempt to leverage those skills in order to show you how to live sustainably in an urban environment.

So, what will this blog consist of?

Each week–or maybe several times a week–we will post an article detailing a topic of interest or a portion of a build. We want to go through both theory and practice in developing this concept of individual Urban Sustainability. We will give both high level discussions of ideals and technology as well as low level detail about acquiring, building and installing systems to insure your existence. Included will be detailed plans and drawings as well as many pictures of how things are done.

During this process we would like your feedback on how we are doing, how we can make things better, and ideas for other things we can do. We want to be very involved with the wider community because these kinds of ideas in isolation don’t mean anything. We want to get out into the word and and see what others are thinking and doing. This means active community involvement. We intend to take user suggestions and implement them in a real and immediate way in all our projects. We know that many people out there have specialized knowledge in fields we know nothing about and we want to take full advantage of that.

Our project ideas:

  • Waste water treatment
  • Rainwater collection (currently under construction)
  • Aeroponic growing
  • VAWT (  Vertical Axis Wind Turbine)
  • Bidet
  • Gray water toilet
  • Heat reclamation for the shower, sink, dishwasher, and washer
  • Grocery bag (cloth) design
  • Homemade soap
  • Making lye from scratch
  • On-demand hot water heater

So stay tuned (if you can tune the internet lol)….we have lots more to come!

P&S

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6 Comments to Introduction to Urban Sustainability

larry Pfeffer
January 6, 2009

Hello,

First off, I found my way to your blog via Demented Chihuahua’s signature in a message on the reprap forums (fora?), so I will presume that one of you is “Demented.”

I think you’re onto an interesting notion, and I’m heartened so see that (from reading your post), suburban survivalism is part of the mix. I live in suburban Boston (or, as my wife puts it, greater Cambridge.)

A couple comments on some of your proposed projects:

# Bidet
# Gray water toilet

I saw something related in the home of a friend of a friend. Instead of a flat cover on a toilet, there was a small, cold water sink “embedded” in the lid, and the water running through the little sink’s spout was the diverted refill water for the tank. Since this water had not yet entered the tank, is was just as clean as any other water from the cold-water supply. Whether one washed with it or not, the toilet tank still refilled, either with virgin or hand-washed water. This seemed charmingly simple, yet effective in reusing water.

Regarding:
Heat reclamation for the shower, sink, dishwasher, and washer

I thought about this when I was an undergrad (M.E. at UCSD, long ago); I think it’d work best for the shower, since the hot water demand is prolonged and fairly slow. My thought was to make a (regenerative) heat exchange from the water heading down the drain, to preheat the cold water coming in. The trick here is that one wants to get significant heat xfer, but you have only a tiny bit of hydraulic head, so you can’t easily have many tiny channels (to say nothing about how they’d tend to crud up, which would also hurt the heat xfer. Still, it might be made to work.

Best regards,

Larry Pfeffer
Lexington, MA, USA

larry Pfeffer’s last blog post..Hot Stuff! First Extrusion with New Extruder Design.

admin
January 7, 2009

Larry, you are absolutely correct, Stan is Demented Chihuahua…shhh, don’t tell anyone!

We really liked the toilet idea of yours…That’s a fantastic little addition. We’ll definitely put that into the mix when we get there. The toilet wastes a lot of water in all stages so any optimization would be killer.

The heat reclamation idea is also one of our favorites. We were thinking some sort of coiled copper tubing for the cold water into to the water heater could be put into an oversized section of PVC which would the be placed in the drain line to the shower. This would allow “ok” heat transfer–not great but we are just looking for improvement, not perfection–and minimize the clogging hazard.

While the shower is prime territory for this we also think the dishwasher is a good candidate as it takes the hottest water in the house to run. Typically the dishwasher determines what your max temp for hot water needs to be and thus what your hot water heater needs to be set at. Reclaiming this hot water–in the same way described above for the tub–would give substantial benefit.

A related project kicking around in our heads is to make our own on-demand hot water heater–commercial units are stupid expensive–and set it so that it feeds different temperature water for different applications. If you are in the shower, you don’t need 160 F water coming to you. You would simply add cold water to cool it down anyway, thus wasting energy. Better if you had a switch to turn on that told the heater to feed you water at the exact temp you desired–say 110 F–so that you only have to turn on the hot water with no cold. Same with the Dishwasher. Flip a switch and it delivers 160 F water.

Thanks for all your comments.

P&S

larry Pfeffer
January 7, 2009

S&P

Since my written description (of the sink in the toilet-tank lid) might not have been clear enough, I queried the guy who had it in his bathroom. He was kind enough to reply with a URL for the product. The photo on the realgoods website is clearer than my verbiage:

http://www.realgoods.com/product/home-outdoor/bathroom-bedroom/towels-accessories/toilet+lid+sink.do

HTH,

Larry

larry Pfeffer’s last blog post..Hot Stuff! First Extrusion with New Extruder Design.

admin
January 8, 2009

Thanks for the link to the product. After looking at it though, we can’t really see that it would make much of a difference to use one. The clean water is pumped from the toilet, next it’s used for hand washing, and then pumped back into the tank of the toilet. While this contributes a small amount of gray water to the toilet volume, it doesn’t seem like a significant amount. We are trying to create a toilet that runs on 100% gray water, not a fraction of that amount. This means that we are considering routing water from the shower, kitchen sink, and dishwasher etc. into a tank that would hold water specifically for flushing the toilet.

Although, the convenience of having a sink right on top of the toilet saves a lot of space in the bathroom. But the price is also cheap enough to consider if money is tight. Thanks again for your comments, and the link!

Well put job will definitely visit soon

Engaging job, will come back again-

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