Recycling Rethink: What to Do with Trash Now China Won’t Take It
wsj.com
wsj.com
The main vision systems are now fast enough that sorters work by moving objects on a wide, fast belt where they go flying off the end. While in flight, multispectral cameras look at the objects, using both reflected and transmitted light, and within milliseconds trigger air jets to blow items in the desired direction. Most robotics videos from startups are sped up because the thing is so slow. The ones from commercially successful sorting companies are slowed down so you can see what's happening.
The problem is what to do with the sorted stuff. It's just not very valuable. It's possible to recycle plastic bottles all the way back to more plastic bottles. A huge plant near LA does this for most of southern California. States that charge a recycling fee for containers can handle it, but those that don't...
[1] https://www.ubqmaterials.com/
[2] https://www.washingtonpost.com/graphics/2019/climate-solutio...
So they can sort things well. It means they can put them in a dump neatly. Most things that get put into recycling don’t make economic sense to recycle -except aluminum and some other metals.
Most plastics under cheap (but still uneconomic) recycling suffer from heat history and becomes less useful.
As recycling has grown, reuse has almost completely died out, and one time plastic has replaced most of those former deposit-return items.
I'm wondering what happens when people put random junk in the recycling bin because it's allegedly recyclable.
There are some VC-funded companies in this area, but the vision/AI part is pretty much solved. It's getting the mechanical systems to be robust enough in a very dirty environment that's hard.
The big insight is that most of the separation has to be done by cheaper processes operating on the bulk material stream. The robotic system is just to pull out stuff that didn't get sorted correctly by screens, drums, shakers, magnets, blowers, and vision-based air jet sorters. An all-robot system is too slow and too expensive, but quality control robots for getting from 5% contamination to 0.5% contamination are cost-effective. Here's a good video of the whole process.[2] 70 tons an hour.
That makes it possible to get contamination levels down to China's new standards and the ones of US plants which can use the stuff. "Because of China's voracious appetite for all types of U.S. scrap exports over the past 20 years, MRFs "had the luxury of being able to sell the mixed rigid plastics [and] mixed paper without a lot of sorting and quality control." ... "Some materials are up in price … PET is actually increasing. It's a supply and demand thing," Butler said. "For the most part, if you can separate that material, there are domestic markets for that right now."[3]
So, in the recycling industry, some are whining about China's policies and others are fixing the problem, shipping products, and making money. It's small and medium sized cities that can't keep up. The big cities have big plants with multiple 70 ton per hour processing lines with the machinery running 2 shifts a day, and direct deals with companies that can use the plastics, metals, etc. A small town doesn't generate enough recycling to do that, and trucking unsorted material long distances is too expensive.
[1] https://resource-recycling.com/recycling/2019/05/07/how-recy...
[2] https://youtu.be/4FpsH_ETT7c
[3] https://www.wastedive.com/news/china-contamination-standard-...
It was marketed in the 80s-00s as more of a panacea than it is, and specifically seems to have inculcated a dangerously willful ignorance of further action. I.e. "I already do the recycling thing, so I do my part."
From why I can tell, the toxicity, micro-plastic, and energy concerns are the primary mass-scale benefits? In that order?
The majority of which could be reaped at scale by funding toxic material collection programs, mandating less toxic material choices, and re-instituting a bottle tax+.
In return, we've let major, industrial-scale environmental catastrophes go unmitigated, because out of sight, out of mind.
From my reading, the 1970s push for recycling was always predicated as a vanguard movement, intended to educate the populace at large about environmental issues.
The expectation was that we would then pivot to tackle more difficult problems.
Instead, we have 50 years of patting ourselves on the back for hauling cardboard out to our suburban recycling containers.
+ Looking at you, Coke and Pepsi, for fighting bottle taxes around the world.
Recycling is the worst good thing we should be doing.
Reduce, Reuse, Recycle. In that order.
I've been to many, many developing countries around the world that have extremely good reuse programs for their bottles, and it works extremely well.
In fairness, Germany is a developed country with extremely good reuse programs. Glass beer bottles are often totally reused. You can, if you want, avoid plastics entirely and just buy drinks glass containers. The local supermarkets all have return bins; all restaurants will take them, although they won't give you your deposit - which seems like a very fair deal to me.
The one odd exception is milk. A classic example of American container reuse, but I don't see any milk sold in glass in Germany.
https://contentpool.wirtschaftsverlag.at/files/uploads/image...
From the look it is a half-liter bottle (we usually buy cream like this), there are 1 liter bottles for milk that look almost the same.
What is a scuff ring by the way? Is it this ring that tears off from plastic caps at e.g. Coca Cola bottles when opening them?
It looks like the bottles rub against each other at that point, and it indicates the bottle is old/has been used a bunch of times. Is there a German word for it?
I will look out for them.
Which leads to sort of funny situations: locally it's been about 20 years since the milkman made his last round. Now there's again a company starting to do a similar thing (bring bottled milk/juice, local farmer's products to your door weekly) and some people who don't know better consider it revolutionary, and the poor company can't keep up with demand :)
That movie was the first time I learned about "milkman" being a job. We had glass bottles that we filled ourselves at a self-service station that a farm just outside the city set up.
However they don't have Pfand and are not reused at the moment [1]. At least not comercially. They make great containers for sugar or flour. According to the source they will start the reusing "beginning 2020".
1. https://www.spar.at/nachhaltigkeit/produkte/verpackungen/meh...
In East Germany we only had very few bottle designs that were used throughout the entire country and all firms filling something in bottles used those designs. You could return a bottle filled with beer in the north of the country by one company and return it in the south and refill it with lemonade.
When I worked in the brewery we had trucks carrying returned glass bottles coming in, several per day. The labels on those bottles did not matter at all, only the form of the bottle did. They were sent through the washing machine, followed by a visual inspection station (today that would be automated, back then somebody had to sit there and watch endless streams of bottles pass in front of a bright white light source).
New bottles were fed into this system maybe 5% of the total nr. of bottles, maximum. The bulk of the bottles we filled had just been collected from all other the "Kreis" (county) that or the previous day.
There was slightly more variety for bottles with spirits, but non-alcoholic beverages and beer all had a handful of generic designs only:
- https://i.pinimg.com/originals/8a/2a/16/8a2a16b9573f33af14e1...
- https://www.picclickimg.com/d/l400/pict/283478094305_/DDR-Fl...
- https://i.ebayimg.com/images/g/TdAAAOSwy6hc0vzC/s-l400.jpg
- https://i.ebayimg.com/00/s/MTYwMFgxNjAw/z/01kAAOSwoptdW8pU/$...
The current German system has all kinds of bottles and LOTS of restrictions. The labels have to match, I cannot return bottles unless the shop sells these exact bottles (including the brand). There were no restrictions in the GDR and only very few designs to deal with. There also were no plastic bottles and cans, or if we had any they were too few for me to even remember. Sure, that last one is confounded by time, there were not that many in the West in the 1980s either.
In East Germany it worked for all bottles too, not just for beer bottles. The brewery where I worked also bottled various non-alcoholic drinks, suing the exact same bottles for all. The switch from one liquid to another didn't take long and was quickly performed, just restack different labels, flush the previous liquid, then restart the bottling with little overall delay. The bottles already in the queue remained the same.
German: https://www.n-tv.de/ratgeber/Wo-kann-man-welche-Flasche-zuru... ("Inside the German bottle jungle: Where can you return which bottles?")
edit: same for the Rewe's i know. edit: err, and Kaufland.
Edit: And not just fleece. Also cloth, and yarn for knitted stuff.
One solution is to use a special bag to capture and filter them out. [1]
But that's an issue with all synthetic clothing, right?
I guess that making bottles and sheeting would be best.
Patagonia has some information about it on their site somewhere, they also stock the guppy friend bags.
And I'm reminded of a frightening experience. So I'm home after a night of dancing with friends. And I notice a burn hole in the back of my wool sweater. Some jerk with a lighter, I'm sure. But it could have been very bad, if I had been wearing PET fleece.
The world has a lot of important environmental problems, like climate change. Landfill space is not an important environmental problem. You should spend your worrying energy on something else.
Is it the correct solution, if we have already shifted our economies to carbon-neutral or -negative modes?
These are very different situations, and we only have time and money to focus on so many things at once.
Perhaps it just needs rebranded as pre-emptive landfill mining?
http://waste-technology.co.uk/what-is-a-dirty-mrf-and-why-th...
A substantial portion of the waste stream is just organic material (which is worth very little).
But, in a thousand or even a million years the atoms will still be around. Basically we may find this stuff useless, but that does not mean it’s permanently devoid of value. If nothing else archeology often involves going through trash heaps from ages past.
Not unlike how people recycle ships and electronics right now
Most of the popular fear about running out of landfill space can be traced back to a misused statistic about small rural landfills being decommissioned. RCRA Subtitle D regs basically have driven the shutdown of old town dumps. Modern landfills are much more efficient, with better safety controls for leaching and gas capture, better compression and sorting, and even processes that speed decomposition. The headlines will scream that the number of available landfills are dropping rapidly and neglect to mention that total capacity is actually up and total disposed volume has been trending down since 2000, even despite population increases.
Highly recommend touring a landfill and learning about waste management at scale.
There are really interesting engineering dilemmas that are always a step more nuanced than "we must use x solution or fill the world with trash."
Current facilities are way better equipped than the old solution of uncontrolled municipal dumps.
A lot of these fixes are more expensive to fake to code than to just implement, and isolating sources of groundwater pollution can take a few years, but not decades. Also a lot of these people live there and know the risks to their kids' safety.
The environmental engineers who consult on these projects didn't generally go into the field to poison people.
Look at nuclear power. Might be the greatest and cleanest solution in theory. In practice, look at the revelations after Fukushima. Mismanagement, dramatically negligent maintenance, corruption. Would proper management have prevented the incident? Probably not, but it wouldn't have been nearly as bad. Without the tsunami, this might have continued for years to come and who knows how and when shit would've hit the fan in this alternate reality. Then the shitshow that is storing nuclear waste here in Germany. Again instead of listening to scientists and engineers in the end they dumped the metal containers inside an old salt mine. Big surprise, salt water lead to rapid corrosion and now they have to get that shit out again, but thankfully the tax payer cover that bullshit. Another example? 737 MAX. Yet again a story of a company that kept cutting costs over years and years until it blew up in their faces. It ticked pretty much all the boxes over the year. Cutting corners, saving costs, budget restrictions, ignoring concerns by engineers in charge, you name it.
It's always the same pattern. If Apple doesn't innovate, cheaps out on components, scraps QA, their products might eventually suck so much that nobody will buy them anymore and they'll just disappear, but who cares. Nuclear isn't bad. Aviation isn't bad. Landfills aren't. But these are these kinds of industries where negligence can have catastrophic results. And especially something that is as long term as a landfill is predestined for this kind of failure.
This is partly due to the energy cost of new vs recycled so somewhat ironically landfill becomes a slightly better option as the grid becomes more renewable, though unlikely to pull ahead of recycling, since it also takes energy that would be getting cleaner.
i very, very much doubt that said study existed at the time these decisions were made.
also the energy cost is a wash (or loss) for almost all but aluminum. glass would be fine but we are awash in glass, so AIUI cardboard and aluminum are the only consumer items worth recycling when consider energy and other input costs. i’ve no idea on total climate impact (eg greenhouse gas production) though and i don’t doubt you. i only doubt your assertion that governments made these decisions with that in mind.
and
https://www.wrap.org.uk/content/environmental-benefits-recyc...
A summary from the latter talking specifically about plastic (though the document covers other materials):
The results confirm that mechanical recycling is the best waste management option in respect of the climate change potential, depletion of natural resources and energy demand impacts. The analysis highlights again that these benefits of recycling are mainly achieved by avoiding production of virgin plastics.
The environmental benefits are maximised by collection of good quality material (to limit the rejected fraction) and by replacement of virgin plastics on a high ratio (1 to 1).
Incineration with energy recovery performs poorly with respect to climate change impact
Landfill is confirmed as having the worst environmental impacts in the majority of cases.
As the UK moves to a lower-carbon energy mix, recycling will become increasingly favoured.
One of the studies said the costs of sorting made the benefits of plastic recycling negligible to iffy, confirming parent's claim that aluminum drives recycling value and plastics are a wash.
They shouldn't be allowed to call it a meta-analysis if they just read three studies and picked the conclusions they liked best.
They also found 20 papers that dealt with the climate change emissions and total energy use and ranked them on those factors as well.
The comment I replied to specifically said that we shouldn't worry about landfill space as we have more important issues like climate change, so that's 95% of studies found suggesting that opinion isn't based on facts and that landfill would be a worse option than recycling plastic for greenhouse gas emissions, which we've agreed is a serious problem. (And landfill broadly tied with burning it for energy on greenhouse gas emissions with different assumptions giving different answers).
To your point about total energy use, landfill comes out worst consistently and recycling best.
You could make the leap and assume the process that uses the least energy and releases the least greenhouse gases is also the least expensive economically (if you account for externalities) but that's a bonus on top of providing useful information that could change opinions related to greenhouse gas emissions.
You seem to doubt that governments made decisions based on facts, yet the facts now support their decision, while your stated beliefs about energy usage are contradicted by the science.
Is it not possible that the environmental benefits of recycling plastics had actually been considered by governments that brought in legislation? Where does your belief that it was ever considered likely to be a counterproductive activity come from? Did they convince you of anything else, like solar panels not making sense or EVs being worse for the environment, or wind turbines boondoggles? All those were similarly supported by effective government support programs and repaid the investment greatly.
It is not. the paper you cited (thank you) was written in 2017. But more to the point, governments don’t work that way.
If in fact the reason for recycling is environmental benefit, we (USA anyway) would not be in the situation where we are putting plastics back in landfills, and we would not have been in the prior situation where we dump plastic and ewaste to other countries with no oversight whatsoever on what happens to it once it leaves our shores. the environmental impact is the same, here or there.
> You seem to doubt that governments made decisions based on facts,
It's actually the reverse, I've become more skeptical because so many recycling programs are now just landfilling plastic because the costs no longer justify recycling it.
The price of oil should tell us something about the relative efficiency of recycling plastic. It would be weird if there was zero relation.
Oil prices being consistently low for a decade probably contribute to shifting efficiencies here.
I worry more generally about reuse and recycle heuristics since early environmental impact studies showed they frequently produce bad results. But that doesn't mean they always do.
Maybe you're right and those input factors haven't changed enough to affect the total cost math.
If landfills are not such a problem, why "developed" countries (I won't name them but we know who they are) are exporting junk to China, India and Africa? Why simply not set landfills near popular cities so we can all enjoy the beauty of "low environmental issue" problems ;)
These days there is more trust in corrupted media than plain logic.
Here the landfill has recycling sorting on site and puts glass in the landfill because no one will pay what it costs to ship it.
And those developed countries were willing to sell it.
And yes those developed countries do in fact have landfills and they use them. there are no countries that export pure trash to be landfilled in a third world country.
Of course they do.
Even Toronto was exporting 100 truckloads of trash to Michigan for years until recently.
https://www.freep.com/story/news/local/michigan/2018/02/19/c...
Michigan, perhaps you might have noticed, borders Canada. No one is shipping trash long distance.
The cost isn’t just disposal, it’s also production. Plastic production (‘ethylene cracking’ specifically) is really environmentally gnarly. Communities across the US and internationally will be way better off once we move away from disposable consumer plastics.
If we made less plastic, would the decrease in gas/oil consumption just be increased in other processes?
[1] https://www.nytimes.com/2019/08/12/business/energy-environme...
Let me guess you're American, where free space is plenty? In most of Europe, space is constrained and about half the EU has banned ordinary landfills for that reason.
Also, landfills are an inherent danger to their surroundings in case the bottom barrier breaks and fluids seep into groundwater or that more-or-less uncontrollable fires break out.
https://www.nytimes.com/2018/09/21/climate/sweden-garbage-us...
That said, I keep hoping thermal depolymerization takes off.
In the 80s from what I understand, in response to the Mobro 4000 incident: https://slatestarcodex.com/2019/01/01/what-happened-to-90s-e...
That's not to say it's better than many alternatives (the article claims it's better than most landfills), but let's call it what it is.
Not quite. It turns out that even the ashes have their uses [1].
Of course oil-fired power plants aren't really used anymore (at grid scale), so it's more like recycling trash into coal or natural gas.
The article doesn't clearly explain why the shift has happened. It does point out:
> ... China ... wants to stimulate domestic garbage collection and end the flow of foreign trash it sees as an environmental and health hazard.
And later:
> China accepted dirty and mixed recyclables because it had low-wage workers to sort out unwanted material, often by hand. That gave American contractors little incentive to weed out food scraps, plastic bags and nonrecyclable junk stateside.
Have wages in China really risen so quickly that human garbage sorters are now too expensive? That seems unlikely, and the article gives no evidence for it.
An alternative explanation might be that the plastic was never recycled in the first place. It's more than just sorting. Each container has a residue of liquid/solid stuff that can't possibly be compatible with low-cost material recycling.
What if the material received by China was actually burned instead to generate energy rather than new containers? That might explain the newfound reluctance of China to take the stuff.
If China were to burn all recyclables in a manner consistent with the rest of their industrialization, the process probably wasn’t very clean.
China could invest in cleaner recycling processes, but a quick way to reduce a problem is to reduce its scope, and banning imports of recyclable material is certainly a quick way to do that, everyone else be damned.
(I don’t really think China burnt all of it, but if they did and stopped this would be why.)
Can’t cite at the moment...
Probably. Some Chinese companies are now outsourcing labour to cheaper countries like Vietnam.
Not sure if it's related.
This is similar to making a bad long-term bet and having to pay up. There are a lot of other attractive choices to plastic, but the window to transition seemlessly appears to be closing more and more each week.
Seeing the death of coal should give them a map to follow. They made a bad bet on the future too.
this needs to be solved with regulation.
Imho it didn't help all that much. I did not find numbers for the reduction in packaging, but my impresssion is "none". As for recycling the waste they collect, there are numbers between "half is just icinerated" and "only 5% is recycled": https://de.m.wikipedia.org/wiki/Duales_System_(Abfallwirtsch...
You are are responsible for having near-zero footprint in your life, where this number should be universal for rich and poor alike. You must bear whatever effort or cost to live within this footprint. You must make choices to not acquire things that will become trash and you must take steps to ensure what you need to dispose of goes into proper channels. You will probably want collective solutions to minimize cost and maximize efficiency. You also need regulations to handle compliance and governments to ensure the fair application thereof. Yes, this is an expensive ideal, yet the opposite seems hard to justify morally.
Current modern life is using fossil energy, natural resources, and land area on Earth to live a life of ease and deferred responsibility. Just because there is still space to make landfills and air/soil not yet saturated with pollutants, what right do we have to take it?
The way this might be similar to CO2 "waste" is an exercise left to the reader.
Edit: This is all that Firefox Reader View shows. No explanation. Just this:
> Recycling Rethink: What to Do With Trash Now That China Won’t Take It
> Saabira Chaudhuri
> 1 minute
> For decades, America and much of the developed world threw their used plastic bottles, soda cans and junk mail in one bin. The trash industry then shipped much of that thousands of miles to China, the world’s biggest consumer of scrap material, to be sorted and turned into new products.
> That changed last year when China banned imports of mixed paper and plastic and heavily restricted other scrap. Beijing said it wants to stimulate domestic garbage collection and end the flow of foreign trash it sees as an environmental and...
Another edit: I would subscribe, if I could. I mean, just 1 EUR per quarter. But they want a credit card, and Mirimir has no credit cards. And expecting me to trust their discretion, if I shared my meatspace identity, would be foolish. But even trying for anonymous credit cards violates KYC law, and isn't worth the risk just to read WSJ.
If consumers had to pay a significant amount for each load of trash removed from their home, you’d see the market for ultra low waste products skyrocket.
And then the economic value of recycling—from careful sorting by homeowners to the processing of material by recyclers—would immediately make sense.
The same is true for the huge numbers of empty Walmarts throughout the US. We should have made them escrow demolition costs at the time the building was made.
If you put the costs at the very end then all of the trash will still be produced, but nobody could throw it away. Our entire society saves production and reduces waste if you punish the producers of that waste instead.
Also, this doesn't even take into account apartment buildings where individuals dump their trash into trash cutes / shared bins / etc. You would essentially need to retrofit every apartment building with a collection system capable of calculating individual output, or charge all residents of each building equally.
In my view, we should be building more effective landfilling infrastructure and stop telling people that putting their garbage in the yellow bin is somehow better or more moral or environmentally friendly. We have plenty of land that can be used to sequester waste, the issue here is people have been tricked for years into thinking that recycling is better or somehow good for the environment while ignoring the effects of energy intensive recycling plants and waste incineration because it's a feel good talking point.
Plastic you throw in the recycling either gets burned or sent somewhere it might be processed and apparently end up free in the environment. We should just be sticking it in the ground until we can enact policies to limit waste.
The simplest workable system would be to burn everything (producing electricity) and filter the metals from the ashes.