Mining Waste and the Circular Economy
Over the last century, we have mined more and more raw materials and made products from them. Rising prices for mined raw materials and improvements in recycling technology have made some industries more dependent on recycled materials than ever before. Bob Tita in Wall Street Journal This trend in the aluminum industry was detailed last week. According to Tita:
“U.S. aluminum consumption rose 11 percent last year, rebounding from a pandemic-impacted decline in 2020, according to the Aluminum Association trade group… To meet growing demand, aluminum companies are doubling down on recycling, melting more More scrap to increase aluminum production… More than 40% of the country’s aluminum supply is already produced in this way, making the United States one of the world’s largest consumers of aluminum scrap. One of the largest exporters in the world According to government figures, 2 million tonnes of aluminium scrap was shipped overseas last year… Analysts say that about 90% less electricity is required to smelt aluminium scrap compared to producing it in a smelter that refines bauxite.”
One problem with recycling is that our current system requires humans to sort waste and relies on volatile raw material markets. One element of the solution to this problem is more automated waste sorting and waste extraction systems. The early stages of development of this technology are underway.According to Lori Ioannou and Magdelena Petrova NBC Finance Channel:
“American companies and researchers are developing AI-assisted robotics technology that can work with humans in processing plants and improve quality control. The goal is to make robots better at sorting waste and reduce the pollution that human workers face every day at recycling plants and health hazards. Sorting waste is a dirty and dangerous job. Recycling workers are more than twice as likely to be injured on the job as other workers… The industry also has a high mortality rate. robot The job is simple. Guided by a camera and computer system trained to recognize specific objects, the robot’s arms glide on a moving conveyor belt until they reach their target. Oversized pliers or fingers with sensors remove cans, glass, plastic containers and other recyclables from the trash and place them in a nearby bin. ”
A recent academic study by Henning Wilts et al.published in magazines resource Efforts to leverage artificial intelligence in waste sorting are analyzed and titled:
“Artificial intelligence in municipal waste sorting as a circular economy enabler. These analysts found that AI-enabled robots could improve working conditions for human waste managers and increase the purity of waste streams.
The technology is relatively new, but has enormous potential. There are many economic factors that lead to waste management that may ultimately be dominated by waste extraction and resource recovery. First, the cost of managing solid waste is increasing. Land for landfills is becoming more expensive and simply unavailable in many areas. More and more waste is being processed through some form of technology. If the cost of this technology and waste management process can be offset by selling the resource, that would obviously be desirable. Second, the cost of extracting raw materials is growing, as these materials must be extracted from inaccessible locations, and due to the expense of complying with regulations that protect the environment near the mines, these regulations are eventually (if slowly) implemented.All of these provide a Potential Economic basis for recycling.
The environmental case for a circular economy is clear. We need to end the linear model of mining, using and discarding resources. This model damages the environment and leads to ever-increasing costs. Raw material prices will rise, and the cost of repairing toxic substances in the biosphere will continue to grow. A linear model might work for a planet of 1 billion people who don’t consume much, but it won’t work for a planet like ours that consumes 8 to 10 billion people. We are slowly starting to develop a circular economy that redefines “waste” as a resource. We still have a long way to go before we end the linear economy. Where possible, we need to design consumer products for remanufacturing. Computers and other electronic equipment should be designed to be removable for raw materials, or should be built as the basis for next-generation devices. Food and sewage waste are used to make fertilizers. Some of these resource reuses require new product designs; some require more advanced waste sorting and waste extraction facilities.
The environmentally friendly extraction of waste streams for resources requires the use of renewable energy. These waste reuse processes are energy-intensive, and both the financial and environmental costs of using these processes need to be minimized. This means they need to be powered by renewable energy. While waste sorting and mining facilities will be capital-intensive, the revenue stream to support these capital expenditures can be generated through the sale of raw materials and reallocation of current funds allocated to landfill waste transportation and dumping fees.
Locating a waste mining facility would be a political nightmare. No one wants to live near these facilities. One possible solution is to build these facilities on or near existing landfills, waste transfer stations, or other waste management facilities. The garbage truck has come in. Better-designed facilities may include tunnels and garage structures to reduce the visibility and environmental impact of truck traffic. They should of course include advanced emissions and effluent controls. In the case of landfills, there may be a time when they will also be mined for resources. It might be a good idea to find waste management and mining operations nearby.
I’ve been writing about trash for over two decades. I know this topic is as tedious as possible. Political leaders are reluctant to publicly acknowledge waste problems or waste solutions. No one seems to want to cut the ribbon on a new waste management facility. However, it is impossible to achieve an environmentally sustainable city without a system for handling waste and the desire to benefit from waste reprocessing. Aluminium is a metal for which cost-effective recycling systems have been developed. Recycling rare earth minerals used in electric vehicle batteries has also proven highly profitable. In fact, as electric vehicles become more common, we can expect to see them mined for raw materials at the end of their useful lives.
It’s important to understand how aluminum is integrating reuse into its business model and how it is leading other industries.As Bob Tita Wall Street Journal:
“Aluminum beverage cans have the best recovery and reuse rates of any recycled household consumer product. According to the Can Manufacturers Association, approximately 70% of new cans are made from used cans… Scrap aluminum is a huge contributor to the aluminum industry becomes increasingly important as the number of smelters producing virgin aluminum increases, keep shrinking for many years.Six smelters continue to operate in the U.S., down from about two dozen 20 years ago, as executives say aging equipment and power growth Costs make them more and more expensive to operate… Rising scrap prices provide more incentive to collect scrap and invest in equipment to process it. Used beverage cans are trading at $1.38 a pound, up 78% over the past year, according to S&P Global Commodity Insights. The price of used aluminium scrap is 38% higher than a year ago. ”
Reuse of aluminum is not typical for most metals today, but we can expect the same economic logic that applies to aluminum to become common to other materials in the coming years. New technologies and enlightened leadership are needed before we see widespread construction of municipal waste management and material extraction facilities. However, the construction of such facilities is crucial to the development of a circular economy, which is a prerequisite for sustainable cities. Artificial intelligence and automation, along with revenue from the sale of recycled materials, should make these facilities financially viable in the near future.
