The Innards of Waste Dumps
Ever wondered where your aluminum Pepsi can goes after you throw it out? Or your blue pen and old notebooks? Yesterday I visited the PSSI (the Peninsula Sanitary Service, Inc.), which handles Stanford’s recycling and waste management, to get a better idea of where our waste goes. Sure, it smelled like rotting spaghetti sauce at some points, but I found glimpses of beauty there too. (Side note: this is probably not representative of all sanitation/collection facilities; I think the images would vary hugely if I were to be in another country, and even a different part of the U.S.).
The current “divergence” rate, or amount of waste that isn’t going straight into the landfill, is currently 65% or so at PSSI–pretty decent, especially when compared to Houston, Texas (3% !!! = actively opposed to recycling anything). Nonetheless, there is still progress to be made.
One promising corner of the industry is the increasing use of biogas from landfills being used to generate electricity (where it is naturally emitted from the decomposition of our apple cores, banana peels, and cotton gym socks). Half of Sweden’s natural gas vehicles are now fueled by biogas, but the U.S. lags worse than a snail in taking advantage of this resource. Capturing biogas from landfills seems especially promising for inland states, like Colorado, Idaho, Kansas, and Nebraska, who cannot simply ship their waste to China or to Eastern Europe the way that coastal cities do.
Other interesting tidbits: the funding for California’s waste management agency comes from taxes for filling landfills. But as waste management facilities like PSSI become more efficient, less money goes to the agency, and there is less funding for investing in projects to further improve the waste stream. It seems like it ought to be an important consideration when designing policy that you shouldn’t create perverse incentives. Hopefully this would be taken into consideration for biogas projects (which also presumable depend on the filling of landfills to be functioning and profitable.)