Glass Recycling Process Link
Of all the materials that we are continually reminded of as consumers to recycle, glass has to be within the top three on that list; the other being paper and aluminum. I have to admit that I prefer glass and aluminum over paper though. Paper cannot be washed clean of oils and for paper that has oil soaked into it, it can’t be recycled along with clean paper. The simple reason for that is because paper is usually heated and washed which will release the oils into the batch of paper being recycled and therefore contaminate the other clean paper. It will however, compost nicely.
But I digress. If I absolutely must buy a product, I will search for it first in a non-packaged form, then I will look for the product packaged in glass or aluminum. If I look for paper packaged products, it has to be paper packaging that is clean of food oils. I tend to buy very few products that have packaging in the first place, but this is my criteria.
So I thought I would run through a simple and basic run down of the life cycle of a glass container, so here it goes:
- The consumer throws glass into a recycle bin.
- Glass is taken from the bin and taken to a glass treatment plant.
- The glass is sorted by colour and washed to remove any impurities.
- The glass is then crushed and melted, then moulded into new products such as bottles and jars. Or it may be used for alternative purposes such as brick manufacture or decorative uses.
- The glass is then sent back to the shops ready to be used again.
- Glass does not degrade through the recycling process, so it can be recycled again and again.
Some Fact About Recycling Glass:
- Glass is 100% recyclable and can be recycled endlessly without loss in quality or purity.
- Glass is made from readily-available domestic materials, such as sand, soda ash, limestone and “cullet,” the industry term for furnace-ready recycled glass.
- The only material used in greater volumes than cullet is sand. These materials are mixed, or “batched,” heated to a temperature of 2600 to 2800 degrees Fahrenheit and molded into the desired shape.
- Recycled glass can be substituted for up to 95% of raw materials.
- Manufacturers benefit from recycling in several ways: Recycled glass reduces emissions and consumption of raw materials, extends the life of plant equipment, such as furnaces, and saves energy.
- Recycled glass containers are always needed because glass manufacturers require high-quality recycled container glass to meet market demands for new glass containers.
- Recycled glass is always part of the recipe for glass, and the more that is used, the greater the decrease in energy used in the furnace. This makes using recycled glass profitable in the long run, lowering costs for glass container manufacturers—and benefiting the environment.
- Glass containers for food and beverages are 100% recyclable, but not with other types of glass. Other kinds of glass, like windows, ovenware, Pyrex, crystal, etc. are manufactured through a different process. If these materials are introduced into the glass container manufacturing process, they can cause production problems and defective containers.
- Color sorting makes a difference, too. Glass manufacturers are limited in the amount of mixed color-cullet (called “3 mix”) they can use to manufacture new containers. Separating recycled container glass by color allows the industry to ensure that new bottles match the color standards required by glass container customers.
- Some recycled glass containers are not able to be used in the manufacture of new glass bottles and jars or to make fiberglass. This may be because there is too much contamination or the recycled glass pieces are too small to meet manufacturing specifications. Or, it may be that there is not a nearby market for bottle-to-bottle recycling. This recovered glass is then used for non-container glass products. These “secondary” uses for recycled container glass can include tile, filtration, sand blasting, concrete pavements and parking lots.
- The recycling approach that the industry favors is any recycling program that results in contaminant-free recycled glass. This helps ensure that these materials are recycled into new glass containers. While curbside collection of glass recyclables can generate high participation and large amounts of recyclables, drop-off and commercial collection programs tend to yield higher quality recovered container glass.
I do think that if you need to consume products that are packed, please consider the type of packaging that it comes in. It may cost a little more to buy the glass jar of mustard instead of the plastic bottle, but our oceans are riddled with plastic trash that gets lost through the transportation process or even dumped carelessly. Eventually, it will get back to us and then there will have to be a whole new strategy for us to figure out how to not consume plastic from the animals that accidentally consume it first. It is a nightmare loop, but we can either take preventative measures or create ways to try to exit it.
Recycling Car Batteries Link
Processing Alkaline Batteries Link
Recycling Lithium Batteries Link
I question the honesty of how items are recycled (especially electronics) and to be more informed is always better. The next series of posts I’m going to post up with cover a small section of the majority of materials that are deemed recyclable. Although the concept of recycling seems like a savior process for all items- it really isn’t. There are uncomfortable truths that the public is not informed about. I hope these next posts will be helpful for those who are seeking more information.
In a nutshell, batteries vary in how they are recycled. Batteries range from lead acid based to alkaline, lithium ion, nickel, zinc and even mercury batteries. Here is an overall information haul about the variety of them but I also included links to some recycling processes under the infographics above. I always hear mixed reviews as to what actually happens to batteries when we recycle them and this is why I thought I should post some information. I tend to use more alkaline and lithium batteries in my day to day life, so those infographics apply more to me. Hopefully this will bring some more information to you as you come into contact with your day to day electronics that use batteries.
- Lead Acid– The battery is broken apart in a hammer mill, a machine that hammers the battery into pieces. The broken battery pieces are then placed into a vat, where the lead and heavy materials fall to the bottom and the plastic floats. At this point, the polypropylene pieces are scooped away and the liquids are drawn off, leaving the lead and heavy metals. Each of the materials goes into a different recycling “stream”.
- Plastic- Polypropylene pieces are washed, blown dry and sent to a plastic recycler where the pieces are melted together into an almost liquid state. The molten plastic is put through an extruder that produces small plastic pellets of a uniform size. The pellets are put back into manufacturing battery cases and the process begins again.
- Lead- Lead grids, lead oxide and other lead parts are cleaned and heated within smelting furnaces. The molten melted lead is then poured into ingot molds. After a few minutes, the impurities float to the top of the still molten lead in the ingot molds. These impurities are scraped away and the ingots are left to cool. When the ingots are cool, they’re removed from the molds and sent to battery manufacturers, where they’re re-melted and used in the production of new batteries.
- Sulfuric Acid- Old battery acid can be handled in two ways:
- The acid is neutralized with an industrial compound similar to household baking soda. Neutralization turns the acid into water. The water is then treated, cleaned, tested in a wastewater treatment plant to be sure it meets clean water standards.
- The acid is processed and converted to sodium sulfate, an odorless white powder that’s used in laundry detergent, glass and textile manufacturing.Lead acid batteries are closed-loop recycled, meaning each part the the old batteries is recycled into a new battery. It is estimated that 98% of all lead acid batteries are recycled.
Alkaline batteries– Alkaline batteries such as (AAA, AA, C, D, 9V, etc.) are recycled in a specialized “room temperature,” mechanical separation process where the battery components are separated into three end products. These items are a zinc and manganese concentrate, steel, and paper, plastic and brass fractions. All of these products are put back into the market place for reuse in new products to offset the cost of the recycling process. These batteries are 100% recycled.
Lithium Ion– Prior to the recycling process, plastics are separated from the metal components. The metals are then recycled via a high temperature metal reclamation (HTMR) process during which all of the high temperature metals contained within the battery feedstock (i.e. nickel, iron, manganese and chromium) report to the molten-metal bath within the furnace, amalgamate, then solidify during the casting operation. The low-melt metals (i.e. zinc) separate during the melting. The metals and plastic are then returned to be reused in new products. These batteries are 100% recycled.
Nickel-Cadmium- Prior to the recycling process, plastics are separated from the metal components. The metals are then recycled via a high temperature metal reclamation (HTMR) process during which all of the high temperature metals contained within the battery feedstock (i.e. nickel, iron, manganese, and chromium) report to the molten-metal bath within the furnace, amalgamate, then solidify during the casting operation. The low-melt metals (i.e. zinc and cadmium) separate during the melting. The metals and plastic are then returned to be reused in new products. These batteries are 100% recycled.
Nickel Metal Hydride– Prior to the recycling process, the plastics are removed from the cell portion. The cells go through a drying process to remove moisture (potassium hydroxide (KOH) electrolyte and H2O) from the cells. The drying process heats the cells in a time and temperature controlled manner via a proprietary and proven formula. Once these cells are dried they become a valuable feedstock for the stainless steel and or alloy manufacturing industries. The metals and plastic are then returned to be reused in new products. These batteries are 100% recycled.
Lithium Batteries– The contents of the batteries are exposed using a shredder or a high-speed hammer depending on battery size. The contents are then submerged in caustic (basic not acidic) water. This caustic solution neutralizes the electrolytes, and ferrous and non-ferrous metals are recovered. The clean scrap metal is then sold to metal recyclers to offset the cost of recycling these batteries. The solution is then filtered. The carbon is recovered and pressed into moist sheets of carbon cake. Some of the carbon is recycled with cobalt. The lithium in the solution (lithium hydroxide) is converted to lithium carbonate, a fine white powder. What results is technical grade lithium carbonate, which is used to make lithium ingot metal and foil for batteries. It also provides lithium metal for resale and for the manufacture of sulfur dioxide batteries.
Mercury Batteries– The batteries and heavy metals are recovered through a controlled-temperature process. It’s important to note: the percentage of mercuric oxide batteries is decreasing since the passage of the Mercury-Containing Rechargeable Battery Management Act (The Battery Act) of 1996. This act prohibits, or otherwise conditions, the sale of certain types of mercury-containing batteries (i.e., alkaline manganese, zinc carbon, button cell mercuric-oxide and other mercuric-oxide batteries) in the United States.
Zinc-Carbon– Zinc-carbon (AAA, AA, C, D, 9V, etc.) and zinc-air batteries are recycled in the same way as alkaline batteries or by using high temperature metal reclamation (HTMR) method to melt the metals. These metals are then reused in new products. These batteries are 100% recycled.
Zinc-Air– Zinc-carbon (AAA, AA, C, D, 9V, etc.) and zinc-air batteries are recycled in the same way as alkaline batteries or by using high temperature metal reclamation (HTMR) method to melt the metals. These metals are then reused in new products. These batteries are 100% recycled.