Good stuff.

It's probably worth mentioning - Gav would know, but it's not clear from the text - that what is commonly meant by the word "recycling" or "recyclable" and what most of us have in mind by those words are different things.

More formally, we speak of "recycling", where the thing is turned into the same kind of product again, and "downcycling", where it's turned into a different kind of product, one which is neither recyclable nor downcyclable.

So for example glass is entirely recyclable. You can take a bunch of glass bottles, melt them down and make new glass bottles out of them - and do it endlessly.

Where the various plastics, most are not recyclable - or when they are, they're usually not actually recycled, but downcycled. Plastic bottles are not turned into more plastic bottles, but into rubbish bins and park benches and so on - and those rubbish bins and park benches when they break can't be recycled or downcycled, but go to landfill.

This difference in the way the things are processed is not always clear to us as we chuck our stuff into the "recycling" bins. Basically, paper & cardboard, glass, tins and aluminium are recycled, plastics are downcycled.

So when you say that we could zero out the oil input to plastics by recycling, that's true - but it'd have to be different kinds of plastics to those commonly used today. Otherwise we just end up with a heap of plastics in landfill, and still need more oil going in.

But even with it all being trashed, I don't see peak oil as a real threat to plastics the way it is to transport or energy. That's because so much of our plastics use is completely unnecessary (40% to packaging, for example, and much of that multiple layers on one product), and the small amount which is necessary can be done with a relatively small amount of oil - compared to how much is used for transport and energy.

I mean, changing packaging on products is a lot easier than (say) building enough windmills to replace all the fossil fuel-fired power stations or building railways everywhere.

Good point - I should have mentioned that in the article.

Some months ago I found that my plastic recycling tub had been smashed due to UV exposure and rough handling by the boyos on the local Council's collection truck. So I rang the Council to get a new one. In passing I asked, "What should I do with the old one, is it recyclable?"

To which the answer was, "Well theoretically yes," (it's stamped *Recycle 5*). "But we won't collect the old ones because they're too big."

The advice was to cut it up and send it to landfill...
;-)

Groan.

I hope you found a way of getting it to a recycling centre...

I always wondered why one would recycle bottles (such as the ubiquitious standard beer bottle) when one wash them and refill them. Does anyone understand the economicS?

I always wondered why one would recycle bottles (such as the ubiquitious standard beer bottle) when one wash them and refill them. Does anyone understand the economicS?

It is difficult to ensure that all foreign objects (cigarette ends, nails, insect bodies, mould, chemical residues etc) are removed on the wash line well enough to give you a food grade container, for this reason glass is often downcycled into things like road paving aggregate, or fiberglass insulation.

It's somewhat as John Milton said.

If you wash them, it uses a lot of water and energy, and you need some good quality control to make sure nothing's left.

If you smash them up and melt them, it uses no water but a lot of energy, and you can then safely reuse them, any crap left in them will just burn up at glass-melting temperatures.

Also, each company produces or orders its own kind of bottles or jars. For example the Monbulk jam jar is a different shape to the Homebrand jam jar. That means if they wanted to reuse rather than recycle, they'd have to sort out all the different jars and bottles. Easier just to smash them up, melt them down and reshape them.

Of course if we had just a dozen different standard sizes and shapes then it'd be easier to sort and thus reuse them, but there you go. All along the chain of production-use-disposal there are opportunities to step in to make reduce, reuse or recycle easier; at the moment we choose to only step in at the end. That's why we have recycling instead of reusing, and downcycling instead of recycling.

If we stepped in at the beginning of the production-use-disposal chain it'd be easier overall, but then you have to argue with and regulate a zillion different companies who will argue a moral right to have a slightly different-shaped bottle, and so on.

It seems like you're saying that, because fossil energy is cheap, water is kinda expensive, and human attention is very expensive, it's cheaper to use lots of energy to mash glass up and melt it on a large scale.

In the near future we expect fossil energy to be very expensive, water to be kinda expensive, and human attention to be cheap. So, it should become cheaper to use lots of human attention to wash glass and reuse it without mashing and melting.

You are 100% correct.

The excuses always go: We have different shaped bottles, different types of plastic etc.......

Why?? There is no reason retail products need anything except standardised containers, plastic formulations etc [anyone guess why homebrew beer barrels have wide diameter screw tops..?]

Ban Marketing, and everything will go back to brown paper and cardboard packaging.

So, it should become cheaper to use lots of human attention to wash glass and reuse it without mashing and melting.

Along with the human attention to wash out the glasses, will come the human attention to grow, proces and cook the stuff that goes in them at the household level.

I have been home brewing beer now for about 8 years. I have used the same set of glass beer bottles throughout this time and have only broken one or two. I guess that this is an advantage of localised/small scale systems, where items can be reused without any significant processing, energy or water requirements.

It wasn't that long ago when homemade jams, chutneys etc were commonly produced at home (and it probably won't be that far off that this will be commonplace again) using whatever glassware that was available. I guess it comes back to our current economic model. Simply reusing an item, or producing goods at home does not add any value to the formal economy, where as recycling 'adds' to the economy at several points.

I remember the days when old vegemite jars (glass, not plastic) were frequently used as glasses for drinks in a lot of Australian houses.

I suspect in some country towns that is still true today.

Yes, I remember this too. I also remember cake stalls etc as a kid where trifle and other goodies were sold in washed out yoghurt containers or anything else was that available. Probably can't do that any more due to health regulations.

I have thought about this previously but haven't put any effort into calculating it but I wonder what the energy consumption difference is between a packet of store bought biscuits versus biscuits baked at home. We try to cook a batch of biscuits or a cake every week or so. Obviously this saves on plastic wrapping, transportation etc, but most if not all of the ingredients come from the supermarket and I would imagine a home electric oven is less efficient than a factory one.

Any thoughts?

I've got no idea which is more energy efficient.

I bake bread at home every now and then but I'd be surprised if it was any more efficient than buying mass produced bread.

I have thought about this previously but haven't put any effort into calculating it but I wonder what the energy consumption difference is between a packet of store bought biscuits versus biscuits baked at home.

Just the production, the bakery will be more efficient than you can be. It's just that they have bigger ovens and so on.

But most supermarkets don't produce their own biscuits, they're made in a factory somewhere, often overseas. Factoring in the transport and the packaging turns the balance in favour of the home-baked stuff.

Back in the early 70’s one of the topics in my studies was Life Cycle Energy Analysis (LCEA). One case study was on Milk Bottles which at the time in the UK were all made of glass and doorstep delivered early each morning with the Milkman taking away the empties.

At that time it was estimated that each bottle had a life of 12-14 deliveries before it had to be sent for recycling. Repeated mechanised handling and washing took the shine of the bottle making people think it was dirty, so time to melt it down.

Hard to remember when the majority of milk bottles being glass and delivered daily ended but something to do with the rise of cheap fridges, the supermarket and imports of EU milk in cartons.

I was in London (50 / 60’s) so our Milk Floats were all electric driven, big batteries recharged at the distribution depot. As the deliveries were made very early in the morning that was a great benefit due to their being relatively silent, although the bottles bashing about still woke people up. An added benefit of the early mornings for those of us who needed the pocket money was that we could help the Milky and still get to school on time.

In norway all beer and most soda bottles are washed and refilled that way, both glass and plastic. All beer bottles are the exact same shape no matter what brewery it is from, but for soda there are a couple of varieties, one for Coca Cola and one for everyone else I think. The last 5-10 years more and more thin-walled single use bottles have appeared, but most is still for reuse. I don't know how many times a typical bottle gets reused, but occasionally you get one that has deep scourmarks in the glass all around it, presumably from interaction with other bottles and metal parts at the fillingstation.

Regarding economics, it is my understanding that this scheme would not be economical without the tax placed on single use bottles. There was talk about removing said tax a few years ago, but it didn't happen. Lately it has become common to buy beer and soda in cans aswell, something you hardly ever saw just a few years ago. That's because the tax on single use bottles depends on the degree of recycling. The higher the ratio between bottles sold and bottles returned, the lower the tax.

So by not 'closing the loop' downcycled plastics have no long term future since unless the input feedstock comes from a renewable resource...

...and in the very long term we just end up using landfill as an expensive carbon sink...

Nick.

Well, in principle all plastics are recyclable, whatever they are. It's just that some take a lot of energy, water, labour and time to recycle, and others not so much.

It's just that some processes aren't carried out because we don't think it's worth the trouble.

In the Third World, already people are mining landfills for their materials.

And in some countries, the stuff doesn't even make it to landfills. When labour is expensive and resources are cheap, we have landfills; when labour is cheap and resources are expensive, we have this guy:

There is perhaps a happy middle ground between New York's Fresh Kills landfill, and this poor bloke dragging those bottles along. We can seek that - maybe something to write to your MP about.