I did attempt to explain exactly why in another thread Z. I have considerable knowledge of the waste industry, and the reason for this is that that the value of the materials is actually tiny, and the cost of sorting fully, huge. I expect you throw away old accessories, MCBs, etc daily. Look at the value, even new ones are pretty cheap. The plastic is thermosetting so is not recyclable (this means that a chemical change takes place during the moulding process which cannot be reversed). The metal parts are mainly plated steel, and if in bulk, sorted and clean worth about £100 per tonne. There are a few grammes of copper, brass etc in the internal conductors, usually firmly riveted to steel or other contaminants, and a tiny amount of contact material that can possibly be recovered electrolytically. This uses a lot of electricity to recover fairly impure metals with a consequent very low value, which is generally not economic and therefore end up in the steelworks slag.


To get better value some items can be dismantled by hand, but the work is hard, needs skill and a lot of tools, and again is usually only marginally worthwhile, if at all. It is a good experience to attempt to dismantle a white good, say a washing machine yourself, and to attempt to sort the materials (not parts) fully. Steel, stainless steel, copper, plastics separated into types, and non-recyclable materials such as sound deadening, lubricants, rubber, and a few other parts which are difficult such as stoved painted items (energy-intensive and a lot of slag and furnace fumes) etc. It will take you your entire tool collection and several hours and the materials will be worth a few quid. Even getting the copper from the motor and solenoid valves is hard and the value of insulated fine wires is very low. The electronic parts are valueless and will end up in landfill.


Very large shredding and sorting plants do exist, but they are very expensive to buy and operate, have huge power consumption and do not sort small stuff very well, but still produce a large quantity of landfill. The steel usually gets sent to China by the shipload, mainly from scrap cars. Typically they have a big hammer mill, with a motor drive of several MW, and the results are scraps of a few inches dimension, which are sorted for material content, so very small content is lost in the steel pile. They are very noisy, dusty and need a lot of maintenance due to hammer wear and similar with cameras and spectrometers and other high tech bits which don't like the environment, which is horrible as you can imagine!


It is easy to say recycle more, but the difficulties in doing so are huge, because products are very complex and the materials are very well mixed. This is not understood by the Greens or Politicians who set targets in terms of percentages, which are largely unachievable. Thermoplastics could be better recycled, although using them as a fuel is much easier because dirty degraded plastic has changed the structure so cannot be reused easily. Take the outside UV damaged PVC. It is no use for anything as the strength and structure cannot be recovered because the long-chain (polymer) molecules are broken into short pieces. The colour is very difficult to change unless a black filler is added, it is useless.


I'm sure that many of you buy black bin bags made from recycled material. You will notice the smell of the bags is unpleasant, this is because it is partially degraded and contains a good percentage of often rather nasty organic dirt. They are not very strong because the polymer chains are too short. They are always black to disguise the coloured content with a carbon black (from oil) filler. Do not use them for anything but landfill, they are likely to be fairly dangerous in contact with food.


Now you know why the waste industry cannot recycle everything and is fairly choosey about what is processed. The value of many items (LCD screen products mentioned in the link for example) have a severely negative value, all you can get is landfill and possibly sand!

I did attempt to explain exactly why in another thread Z. I have considerable knowledge of the waste industry, and the reason for this is that that the value of the materials is actually tiny, and the cost of sorting fully, huge. I expect you throw away old accessories, MCBs, etc daily. Look at the value, even new ones are pretty cheap. The plastic is thermosetting so is not recyclable (this means that a chemical change takes place during the moulding process which cannot be reversed). The metal parts are mainly plated steel, and if in bulk, sorted and clean worth about £100 per tonne. There are a few grammes of copper, brass etc in the internal conductors, usually firmly riveted to steel or other contaminants, and a tiny amount of contact material that can possibly be recovered electrolytically. This uses a lot of electricity to recover fairly impure metals with a consequent very low value, which is generally not economic and therefore end up in the steelworks slag.


To get better value some items can be dismantled by hand, but the work is hard, needs skill and a lot of tools, and again is usually only marginally worthwhile, if at all. It is a good experience to attempt to dismantle a white good, say a washing machine yourself, and to attempt to sort the materials (not parts) fully. Steel, stainless steel, copper, plastics separated into types, and non-recyclable materials such as sound deadening, lubricants, rubber, and a few other parts which are difficult such as stoved painted items (energy-intensive and a lot of slag and furnace fumes) etc. It will take you your entire tool collection and several hours and the materials will be worth a few quid. Even getting the copper from the motor and solenoid valves is hard and the value of insulated fine wires is very low. The electronic parts are valueless and will end up in landfill.


Very large shredding and sorting plants do exist, but they are very expensive to buy and operate, have huge power consumption and do not sort small stuff very well, but still produce a large quantity of landfill. The steel usually gets sent to China by the shipload, mainly from scrap cars. Typically they have a big hammer mill, with a motor drive of several MW, and the results are scraps of a few inches dimension, which are sorted for material content, so very small content is lost in the steel pile. They are very noisy, dusty and need a lot of maintenance due to hammer wear and similar with cameras and spectrometers and other high tech bits which don't like the environment, which is horrible as you can imagine!


It is easy to say recycle more, but the difficulties in doing so are huge, because products are very complex and the materials are very well mixed. This is not understood by the Greens or Politicians who set targets in terms of percentages, which are largely unachievable. Thermoplastics could be better recycled, although using them as a fuel is much easier because dirty degraded plastic has changed the structure so cannot be reused easily. Take the outside UV damaged PVC. It is no use for anything as the strength and structure cannot be recovered because the long-chain (polymer) molecules are broken into short pieces. The colour is very difficult to change unless a black filler is added, it is useless.


I'm sure that many of you buy black bin bags made from recycled material. You will notice the smell of the bags is unpleasant, this is because it is partially degraded and contains a good percentage of often rather nasty organic dirt. They are not very strong because the polymer chains are too short. They are always black to disguise the coloured content with a carbon black (from oil) filler. Do not use them for anything but landfill, they are likely to be fairly dangerous in contact with food.


Now you know why the waste industry cannot recycle everything and is fairly choosey about what is processed. The value of many items (LCD screen products mentioned in the link for example) have a severely negative value, all you can get is landfill and possibly sand!