Resources The EcoMuse

San Francisco getting a grip on its materials and resource recycling

Written by Sven Eberlein

Last week I went on a tour of Recycle Central, San Francisco’s 200,000-square-foot recycling plant on Pier 96 run by San Francisco’s resource recovery company Recology. Ever since I wrote Where No City Has Gone Before: San Francisco Will Be World’s First Zero-Waste Town by 2020 for Alternet, I’ve had the opportunity to delve more deeply into the composting component of my city’s efforts to make the very idea of garbage obsolete, but up until this year I hadn’t set foot in the place where the contents of our blue bins go to get reborn.


Recology’s Zero Waste Guru Robert Reed had invited me to be among the first to tour and photograph this new system in action. As someone who has been endlessly fascinated with what comes out the other end of our modern industrial habitations, I wasn’t going to let this unique opportunity slip by.

When I got to the tent Recology had set up for the occasion, Robert was already greeting the various media members (SF Examiner, KTVU) and gave us a quick overview of what to expect.


In a nutshell, this $11.6 million system improvement increases the processing capacity of the plant by 170 tons per day, featuring the following components:

  • An advanced metering system for inbound materials.
  • A presort line with 14 sorting stations, the longest in the U.S.
  • Modern equipment that mechanically separates cardboard and glass bottles from other materials.
  • Two new lines of spinning disk screens that separate paper from plastic containers.
  • New high-tech optical sorters that separate different types of plastic.
  • A state-of-the-art glass cleaning system.

By the way, here’s what this new system looked like as it was being assembled outside the plant during my last visit.


As Robert is quick to point out, the purpose of that new capacity is NOT to encourage San Franciscans to consume more stuff but to go deeper and deeper into reclaiming resources that weren’t reclaimable up until now, getting us ever more close to the holy grail of Zero Waste, including the flexibility to recover new materials in the future.

Not so fun fact: those materials will almost certainly never include cassette tapes or wire hangers, as they cause horrible jams in the sorters. So please don’t ever put those in your recycling bins.

Another important purpose of this modernized line is to allow San Francisco to adapt to the rapidly changing recyclable materials landscape. For example, as the amount of newspaper consumed and discarded has declined over the last decade due to our collective shift toward digital media, that same societal paradigm change has brought about an exponential increase in small- and medium-sized cardboard boxes from online shopping and lighter plastic containers for beverages and some foods.

The dominance of cardboard and plastics is palpable when you zoom in on the pile. Thanks Amazon!


Our first stop was the new drum feeder, a large piece of equipment that maintains consistent material flow rates to the presort conveyor and material separation screens to improve overall sorting efficiency. It’s certainly an impressive machinery that you don’t want to get too close to.


We walked up the stairs past the glass cleaning system that removes smaller and finer glass, which is really bad for the downstream sorting process, before arriving at a landing right next to the new extended sort conveyor. This new system allows for 7 classifiers (workers) on each side, which not only allows for improved separation of materials before they are sent through the mechanical sort screens, but also allows Recycle Central to accept a wider variety of commodities in the comingled recycling streams. The chutes on either side of each sorting position indicate the respective materials each classifier is focusing on removing.


The only thing more impressive than the hopping, bopping, skipping and popping of everything from yogurt containers to beer caps across the mechanical and optical sorting belts…


… is the indefatigable poise and grace with which the women and men of the Recology work force makes sure to extract those foreign objects that no machine can disentangle.


The reason Recycle Central workers seem genuinely happy and were making us laugh in the midst of a rather noisy environment is not only due to the fact that as employee owners they earn a living wage with great benefits and upward mobility within the company, but that they believe in the importance of their mission to move San Francisco toward Zero Waste. The fact that the city’s wildly successful composting program has made bad odors a thing of the past at the recycling plant is an added bonus.


The good news is that this new, state-of-the-art recycling system is making their lives even easier, without taking away any jobs.

One thing that figuratively and literally blew me away were the new film plastic vacuums which from now on will allow San Franciscans to put soft plastics in their recycling bins. Now let me point out that our first choice as consumers should still always be to avoid soft plastics altogether (and even the hard plastics don’t make much sense once you’ve discovered mason jars and bulk shopping), but seeing these wrappers sucked up into the overhead pipes to be compacted into plastic casing is pretty neat.


Speaking of plastics, the new state-of-the-art optical sorters that Recology installed to separate all the different kinds of hard plastics and different grades of paper is a sight and soundscape to behold. In total, the system has four optical sorters capable of ejecting seven different commodities. I shot this video to give you a feel for it.

We walked up another flight of stairs past the news and mixed paper lines where similarly weighted foreign plastic materials have to be manually extracted.


To say this tour was an eye-opening experience would be an understatement. Even for someone as deeply attuned to the human excesses of the material world as myself, there is something awesome — in the original sense of that word — about standing right at the foot of that mighty Mount Consumption.


The sheer scale of 600 tons of discarded goods arriving every day…


…evokes Edward Burtynski’s Manufactured Landscapes.


Some of us needed a moment of contemplation. It’s really hard not to at this “Temple of Mitigation” for our consumer society.


At the other end of the process the sorted and compressed bales are waiting to be picked up to continue their life in another form. 20 truck loads of them every day…


…while only two trucks depart with destination landfill. You do the math.


Back outside, we got to chat with the technicians of the system (Van Dyk Recycling Solutions) while Robert shared with the KTVU crew the many ways in which San Franciscans as well as Mother Earth are going to benefit from this, how each of us can do our part to reduce waste by making sure we place all of our recyclables in the blue bin every day while continuing to educate ourselves about our consumption and material flows, and how this could easily be replicated in all cities across the country if we put our hearts and minds to it. Preach!


For Maria and I, this signaled the end of a fun and inspiring outing before getting on our bikes again. For the good folks at Recology, the cycle just keeps on truckin’.


photos by sven eberlein

About the author

Sven Eberlein

Sven Eberlein is a writer, musician and activist living in San Francisco with roots in Germany. In addition to his work with Ecocity Builders, Sven is a contributing writer at Yes! Magazine and Shareable. His focus is on sustainable cities, zero waste, ecological design, clean energy, green and sharing economy, post growth, and conscious evolution.