Drving by a landfill - I notice all these spout like things. Tons of them. They look like water spouts with the pipe coming out of the ground, but where the water should come out, there is a hose-like thing going back in the ground.
Doesn't seem to make sense to me - you have a pipe coming out of the ground and then a hose going back in the ground. Anyone have a clue or knowledge what the h*ll these are for?
All modern design landfills have gas collection and venting systems. The "spouts" are all connected to a permeable layer underneath into which the landfill gases seep. The vents then collect the cages and deliver it to the vertical pipes where technicians can see (by pressure gages) that that specific area of the gas vents are actually working, and further, to be able to sample the gas using what are called "Tedlar Bags" which fluff up when they fill with gas. These are taken to a lab to see the gas makeup. The hoses going back into the ground are hooked up to a collection pipe system which goes to a treatment gas cleanup system then to a lfare pipe or a "gas to electricity" plant. Its all pretty nifty but they still have problems from douche bags driving over the pipes and cruching them, or bad designs or even burrowing animals digging up the vent layers.