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Recycling commercial glass

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Recycling commercial glass

Recycling commercial glass

Glass is easily one of the most recyclable of building materials, but commercial glass doesn’t often get recycled. Instead, most commercial glass ends up in the landfill. Why is that the case, and does it really have to be this way?

Even though glass is a very popular construction material, most commercial glass is already installed in existing structures. Because buildings are intended to last for a long time, the original glass often stays in place until someone undertakes the cost of remodeling or rehabilitation, or the building gets demolished.

Renovations, remodeling and rehabilitation all present an excellent opportunity to update commercial glass. The primary motivator for such an update is usually energy efficiency. In rehab situations, it may be necessary to replace windows that have been broken, especially if a building has been empty for quite some time.

Aside from these special situations, updating the windows in a building usually isn’t a high priority, largely because of the expense involved. When windows are removed or replaced, they’re usually carted off to the landfill, as part of the larger collection of construction debris.

When buildings are demolished, there is little incentive to remove the windows prior to demolition. There’s also very little financial incentive to do so. The market for recyclable glass is very small, so it costs less and takes less effort to ship old glass to the landfill.

Modern commercial windows rarely contain ordinary glass. Laminated glass, tinted glass and safety glass dominate the commercial construction landscape. Other specialized glasses – such as low-e glass – also have coatings and other additives that make recycling difficult, if not impossible.

While these types of glasses can’t be recycled, they may find additional use in fiberglass products or as components of concrete, asphalt or as landfill cover.

Glassprimer™ glass paint is a specialized glass coating that bonds permanently to glass surfaces. GlassPrimer also makes a glass surface molecular activator that is designed to work with UV-inkjet glass printing processes. For more information about Glassprimer™ glass paint, please visit the rest of our site. If you’d like to purchase Glassprimer™ glass paint, please visit our online store .

Photo Credit: Meriwether Lewis Elementary, via Flickr.com

Recycling glass is good for the environment

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Recycling glass is good for the environment

Recycling glass is good for the environment

Recently, we discussed the trend in some major cities to eliminate glass from their curbside recycling programs. The rationale for eliminating glass was primarily economic: glass takes up a lot of space in recycling storage facilities that could be used to house other materials. Glass is heavy, and difficult to transport. Glass is dangerous, because workers can get cut on broken glass. In addition, container glass needs to be sorted by color prior to recycling. Finally, when it comes down to it, glass is inert, and can sit in a landfill indefinitely without harming the environment. It’s a higher priority to keep other, more dangerous items out of the landfill, and if the warehouse space can be used for these other, more dangerous materials, then it’s a fair tradeoff.

Recycling glass takes less energy

You can probably come up with even more reasons NOT to recycle glass, but nothing changes the fact that glass is perfectly recyclable. A finite amount of glass could be produced, melted down and reproduced in a continuous cycle, with no loss in the quality of the end product. Recycled glass takes less energy to melt down and recreate than it takes to produce virgin glass entering the product stream from raw materials.

Glass is superior to plastic or other disposable packaging materials (or building materials, for that matter) because it bears the designation “generally recognized as safe” (GRAS). What you put into a glass container will not change the container, and the container will not change the substance inside of it. The same can’t be said for plastic packaging, which has been demonstrated as a source of contamination. This is especially important for food packaging, and products that are meant to come into contact with food, like cups, plates and utensils.

It takes a lot of energy to create glass from scratch. Furnaces, which run on gas or electricity, need to consume a lot of energy to create the temperatures needed to turn raw materials into their molten state. It takes about one-third less energy to recycle one ton of glass than it does to convert raw materials into one ton of virgin glass.

In glass recycling, it’s typical to mix used glass with new glass to create a hybrid product. From a product quality perspective, there’s no reason “old” glass couldn’t be used entirely to make new containers, and the Glass Packaging Institute (GPI) set a goal for its members to use at least 50% recycled glass in their production processes by 2013. Practically, it’s possible to make new glass using 95% reclaimed glass and 5% new raw materials. The 5% drop is accounted for by contamination and other factors. Scrap glass, called cullet, is typically broken into pieces, but some pieces end up being too small (even dust-like) to be recycled.

A city’s decision to collect or not collect container glass is based on the economics of transporting, sorting and storing glass. Taken over the lifecycle of the glass, even with increased storage, sorting and transportation costs, recycled glass still makes both economic and environmental sense.

If you’d like more information about decorating with environmentally friendly glass, please check out the rest of our site. If you’d like to purchase Glassprimer™ glass paint, please visit our online store .

Photo Credit: Eric Bartholomew, via Flickr.com

Recycling glass? Not so much in cities

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Recycling glass? Not so much in cities

Recycling glass? Not so much in cities

Earlier this year, Houston joined the growing list of cities that no longer offers curbside recycling for container glass. It seems shocking because we’ve always been told that recycling glass is easy and environmentally conscious. It is, but why are cities like Houston, Marietta GA, Harrisburg, PA, Santa Fe, NM, Baton Rouge, LA and Charleston, SC turning away from collecting glass for recycling?

Recycling glass is problematic, costly

The reasons vary, but it all comes down to money. According to Pratt Industries, the recycler for Spartanburg and Greenville counties in South Carolina, glass is the most costly item to recycle and excluding glass from the recycling stream frees up space in the company’s storage and processing facilities for other recyclable materials.

The National Waste and Recycling Association says that the sorting requirements of glass, combined with its weight and other factors make glass the most likely candidate for elimination from recycling programs. Since glass does not break down or create any toxic byproducts, it can sit safely in a landfill in favor of other less environmentally friendly materials.

Complicating the matter further is the issue of labels. Container glass is frequently labeled with paper-and-glue labels, which tends to foul the recycling stream and requires additional handling. In addition, glass breaks, making it dangerous to handle and sort.

Houston, which recently signed a two-year recycling disposal contract with Waste Management, almost abandoned recycling altogether, after difficult contract negotiations. The city was pressured by a significant budget shortfall, and the city administration was not initially able to come to terms it felt the city could afford. By streamlining the curbside recycling program – including the omission of glass – the city was able to find an arrangement that works.

Despite changes to the curbside recycling program, Houston is still in the glass recycling game. The city maintains collection points where residents who are interested in recycling glass can bring their containers. As the fourth largest city in the US, however, the loss of an easy curbside recycling program for glass means that as many as 25 tons of glass will now end up in Houston’s landfills instead of in a recycling program.

Further complicating the glass recycling picture is the fact that the bottom is dropping out of the market for many recycled materials, including glass. Not being able to find buyers means that slim profit margins on glass are in danger of turning into losses for recyclers, and no one is willing to take on a losing proposition.

In the mean time, gaps in municipal glass recycling programs are being filled by third-parties, although environmentalists and glass manufacturers alike worry that the stream of recyclable glass will diminish – pushing the cost of virgin glass higher and redirecting a material that is infinitely recyclable into the waste stream instead.

Glass is truly infinitely recyclable and reusable. If you’d like ideas for decorating with glass, please check out the rest of our site. If you’d like to purchase Glassprimer™ glass paint, please visit our online store .

Photo Credit: Steven Goodwin, via FreeImages.com