Recycling businesses

Recycling is most certainly a noble way to make money. It's input is usually something that might otherwise be thrown away, and its output is something that is again useful to society. The challenges to recycling are how to make the trash-to-treasure cycle worth taking on. The answer is simple - make the process make money - but it's easier said than done. Here is a list of things that consumers could recycle, and my next step in this exploration would be to learn more about how/if businesses are making money recycling any of these things:

• Construction waste
  
• The Re-Store here in Seattle takes construction materials it thinks it can sell again (used windows in good shape, doors, flooring, etc.). There's alot of trash in the trash-to-treasure cycle here, so owners have to be pretty discerning about what they take in.
  
• There are other businesses that can actually take construction debris, like wood, and grind it up into pulp or particles to be used somewhere else. [Need some examples here]
  
• Yard waste:
• How often have you done yardwork and ended up with a huge pile of weeds and sod, a big ole pile of dirt, or chunks of concrete? Don't you hate the prospect of having to pay someone to haul this away, or even worse, load it up in a truck yourself and take it to the dump? It would be cool to find a way to make hauling this stuff away worth someone's time and effort...
  
• Computer parts:
• Places like Re-PC in Seattle will take your old used computers and computer components and sell them to other end consumers. They also serve as recycling centers for things like CRT monitors that nobody seems to be able to get rid of these days. They usually charge a fee for recycling monitors.
  
• Extracting metals and other materials from computer waste - this happens alot in places like China and India where the labor to separate valuable parts is cheap, and the oversight into working with hazardous materials is lax, to say the least.
• Household garbage
• In Seattle, we can recycle glass, cans, paper and food waste by just putting these items out for pickup by the city's waste management services. But there's still alot of crap that gets thrown out that just ends up sitting in landfills. I wonder what this is, and if there's a way to turn it into something useful. [Note: Pyrolisis machines like the one from Clean Solutions Company can dispose of some of this waste]
• Wastewater:
• In cities, most of our wastewater goes to treatment plants. This is how we want it for really nasty stuff, like human waste, but the reality is that we also send alot of "just barely unclean" water to treatment plants, and this water could be used on our own properties. Systems that recycle water within a household are typically called greywater systems, and can take waste water from your shower and use it to flush the toilet, or water the lawn. The use of greywater systems would reduce the energy needed to process wastewater and in the case of using greywater to water your lawn, it would allow the earth to percolate and purify water. This transfers some of the water treatment burden from wastewater systems to the earth (which does it for free. Note that a homeowner would need to be careful about what soaps/chemicals/etc. are put into the greywater systems since whatever goes into the greywater system could end up in the groundwater, so it does require some changes in habits. I wonder if someone has found a simple greywater system that can be installed in new houses? That might be an opportunity for someone interested...