Sofia Martinez
Oahu, Hawaii, is known for its pristine beaches and extraordinary biodiversity. However, the island struggles with plastic pollution, with vast amounts of plastic debris washing up on its shores and threatening its marine life. While Oahu does offer recycling services for its residents, the options for plastic recycling are limited. The island does not have any facilities to process recyclables, and most of the waste is either incinerated at H-POWER, which generates electricity for the island, or sent to landfills.
| Characteristics | Values |
|---|---|
| Plastic recyclability in Oahu | Only a few kinds of plastic are recyclable on Oahu |
| Plastic waste in Oahu | Oahu generates more than 2.1 million tons of waste annually, with plastic debris washing up on beaches in vast quantities |
| Plastic recycling process | Recyclable plastics are placed in blue bins and sent to RRR Recycling Services Hawaii |
| Non-recyclable plastics | Plastic bags, food tubs, hard plastic, styrofoam, shrink wrap, foam rubber, light bulbs, window glass, steel/tin cans, lawn furniture, building materials, milk/juice cartons, wax-coated cardboard, plastic bags, rubber bands, string |
| Recyclable plastics | Plastic beverage bottles, plastic with codes 1 and 2 |
| Plastic recycling challenges | Lack of local processing facilities, economic viability, shipping costs, contamination, low recycling rates |
| Alternatives to plastic recycling | Burning plastic waste to generate electricity through the Honolulu Program of Waste Energy Recovery (H-POWER) |
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What You'll Learn
Oahu's plastic waste
Oahu, Hawaii, generates over 2 million tons of waste per year from residential, commercial, and industrial sources. With a population of less than 100,000 people, this is a significant amount of waste. The island's unique location means that it is particularly susceptible to plastic pollution, with plastic debris washing up on its shores and threatening its marine life.
The recycling system on Oahu has been criticised as being ineffective. The island does not have any facilities to process recyclables, and most of the waste is incinerated at the H-POWER plant, which generates 8-10% of the island's electricity. While this method diverts combustible materials from landfills, it is not without its drawbacks. Some have suggested that the focus should be more on reducing consumption and waste, rather than relying solely on recycling.
The types of plastic that can be recycled on Oahu are limited to plastic bottles with codes 1 and 2, which should be placed in the blue bin. Other types of plastic, such as plastic bags, food tubs, hard plastic, styrofoam, and shrink wrap, are not recyclable on the island and should be avoided or disposed of properly.
To address the issue of plastic waste, Oahu has banned plastic bags and disposable foodware. Additionally, there are non-profit organisations that promote zero-waste, raise awareness about plastic pollution, and encourage recycling. However, the unique challenges of the island's location and the lack of infrastructure for processing recyclables pose significant obstacles to managing plastic waste effectively.
While recycling is an important part of waste management, it is not a solution for all types of waste. The process of collecting, sorting, and shipping recyclables can emit CO2 and other pollutants, contributing to greenhouse gas emissions. Therefore, it is crucial to prioritise pollution prevention and focus on reducing the consumption of single-use plastics and other non-recyclable materials.
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Plastic recycling facilities
Oahu residents and businesses generated 2.1 million tons of waste in 2020, with about 249,317 tons of that trash being recyclable. The island has banned plastic bags and disposable foodware, and there are several recycling facilities and programs in place to help reduce waste.
The HI-5 program, for example, offers a 5-cent deposit redemption for beverage containers, keeping plastic, aluminium, and glass out of landfills. HI-5 beverage containers can be recycled at the RRR Recycling Services mobile "reverse vending machine" trucks and at the Reynolds Recycling redemption centres. Recyclables can also be dropped off at bins located at 76 schools and shopping centres around the island.
The Department of Environmental Services manages Oahu's recycling and waste, providing information on solid waste recycling facilities and business resources. The department also offers programs like free mulch pickup and curbside recycling.
Oahu's recycling guidelines specify that plastic beverage bottles can be recycled, but plastic bags, food tubs, hard plastic, styrofoam, and other materials cannot. Only plastic with codes 1 and 2 can be placed in the blue bin for recycling.
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Plastic recycling challenges
Oahu, like many other places, faces several challenges when it comes to plastic recycling. One of the main issues is the variety of plastics, with thousands of different types, each with unique properties that affect their colour, shape, structure, and melting point. This complexity makes it crucial to sort plastics into distinct categories to maintain their purity. However, different types of plastic are often combined in manufacturing processes, making recycling them much more difficult and costly. This lack of compatibility between plastic types due to inherent immiscibility and varying processing requirements poses a significant challenge to effective recycling.
Another challenge is presented by the design of products containing plastic. Many items are manufactured in ways that make it difficult to separate and recycle the plastic content. For instance, a plastic bottle typically consists of the bottle, cap, and label, each made from different types of plastic. Additionally, plastic products may be bonded with other materials, such as glue or metal screws, further complicating the recycling process. Addressing this issue requires specific expertise in materials and collaboration between manufacturers, suppliers, and recycling experts to design products with recycling in mind.
The recycling of certain types of plastic, such as thermosetting polymers, poses additional challenges. These materials, once permanently cross-linked in manufacture, cannot be mechanically recycled like other plastics. While they can be reused as filler materials after being size-reduced to fine particles, it is not the same as true recycling. This limitation underscores the importance of product design and the need for a circular economy where plastics are kept in circulation and reused.
Furthermore, the economic factors surrounding plastic recycling present a challenge. Virgin raw materials, or newly produced materials, are sometimes cheaper than recycled plastic, creating a cost barrier for recycled plastic use. To overcome this, it is essential to demonstrate the added value that plastic recycling brings to the table, such as sustainability improvements and potential sales increases. Additionally, the cost of collecting and sorting plastic waste can be high, especially when considering the need for specialised containers and the potential for hold-ups in the process.
Lastly, the sheer volume of plastic waste generated annually, much of which is used for disposable packaging or short-lived products, underscores the urgency of improving plastic recycling rates. While recycling is a crucial strategy for end-of-life waste management, the current recycling rates for plastic are low, with most plastic ending up in landfills or being incinerated. This situation is further exacerbated by the increasing production of plastic, highlighting the need for drastic changes and collaborative efforts to address the plastic recycling crisis.
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Plastic pollution in Oahu
Plastic pollution is a significant issue in Oahu, Hawaii, threatening the island's natural ecosystem and wildlife. The island's proximity to the Great Pacific Garbage Patch, a vast collection of marine plastic debris in the North Pacific Ocean, has led to a surge in plastic waste washing ashore. The tourism industry and the presence of the Great Garbage Patch have contributed to the worsening plastic pollution in Hawaii, covering its once-pristine beaches.
Oahu, one of the most visited Hawaiian islands, with approximately 6 million tourists annually, faces a growing plastic pollution problem. A survey conducted by the Oceanography Research Seminar at Hawaii Pacific University found high microplastic densities on six Oahu beaches, particularly those with coarser sands and high wave energy. The study highlighted that microplastic pollution on Oahu's beaches can reach up to 1700 particles per square meter, posing a severe environmental threat.
The plastic pollution in Oahu is attributed to a combination of local and global factors. The island's proximity to the Great Pacific Garbage Patch, formed by rotating ocean currents, brings plastic waste from around the world to its shores. Additionally, local land-based sources, including waste from residents and businesses, contribute to the plastic debris found on Oahu's beaches.
To address the plastic pollution crisis, Oahu has implemented several measures. The island has banned plastic bags and disposable foodware, encouraging the use of reusable and recyclable alternatives. Oahu also practices waste incineration, with the Honolulu Program of Waste Energy Recovery (H-POWER) burning waste to generate electricity. However, incineration has raised concerns due to its environmental and health impacts, including increased risk of heart and respiratory diseases, and its contribution to climate change and air pollution.
While recycling is an important part of waste management, it is not a panacea for the recycling crisis. Many products, such as plastic bottles, are made of different types of plastic, caps, and labels, which complicates the recycling process. Oahu faces challenges in recycling certain materials, such as low-grade plastics, as they would need to be shipped to distant markets for recycling, incurring high costs and environmental impacts. Therefore, reducing consumption and promoting sustainable practices are crucial to tackling the plastic pollution problem in Oahu.
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Plastic recycling alternatives
Plastic is useful but it has a serious downside. The world has produced about 9.1 billion tons of plastic since 1950, and 6.9 billion tons of it has become waste. Only 9% of that has been recycled. The rest ends up in landfills and in the world's oceans, causing plastic pollution that is harmful to wildlife, humans, and the environment. While Oahu does recycle some types of plastic, it does not recycle low-grade plastics (numbers 3-7) and other items such as plastic bags, food tubs, hard plastic, styrofoam, and shrink wrap. Here are some plastic recycling alternatives to consider:
- Biodegradable plastics: Bioplastics are biodegradable or compostable plastics made from natural substances instead of petroleum. While most bioplastics do not break down in home composts, landfills, or loose in the environment, they can be a good alternative to harmful plastics in our food and homes. However, it is important to note that bioplastics can contaminate municipal recycling programs when added to regular recycling.
- Aliphatic polyesters: These are biodegradable plastics that are not as versatile as aromatic polyesters (such as PET used in water bottles) but are being actively researched as a viable alternative. For example, polycaprolactone (PCL) degrades completely after six weeks of composting but is rarely used due to manufacturing costs.
- Reusable bags: Bring your own reusable bags made from natural cloth or 100% cotton mesh biodegradable material when shopping to reduce the use of plastic bags.
- Silicone lids: Silicone stretch lids are an alternative to plastic wrap and aluminum foil. They are reusable, durable, and safe for the microwave, freezer, and oven.
- Bar soap and shampoo: Liquid soaps and shampoos contribute significantly to plastic waste. Switching to bar soaps, shampoo bars, and powder detergents packaged in recyclable containers can reduce plastic waste.
- Alternative materials: Choose products made from alternative materials such as glass, metal, or paper packaging instead of plastic whenever possible. For example, opt for glass bottles over plastic water bottles, soda bottles, or food storage containers.
- Wood: Wood from sustainably managed forests can be used as a renewable resource to replace plastic in household items like cleaning brushes, kitchen utensils, and cutting boards.
- Compostable materials: Some companies offer compostable alternatives, such as EnviGreen, which makes bags that can become food for animals. Oahu also composts green waste to create soil products like Menehune Magic, which is sold in garden shops across the island.
- Biodegradable cutlery: Bakeys offers spoons, forks, and chopsticks made from sorghum, rice, and wheat flour, providing an edible alternative to plastic cutlery.
- Plant-based toothbrushes: Toothbrushes made from bamboo or compostable castor bean nylon provide a more sustainable alternative to plastic toothbrushes, which contribute significantly to landfill waste.
These alternatives to plastic can help reduce our dependence on single-use plastics and mitigate the environmental impact of plastic waste.
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Frequently asked questions
Only plastics #1 and #2 are accepted for recycling in Oahu. These include plastic beverage bottles, which should be rinsed and have their lids removed.
All of Oahu's trash goes to H-POWER, where it is burned to create electricity. However, Oahu does not have any facilities to process recyclables, so they are shipped off the island to another processing facility.
Other materials that can be recycled in Oahu include cardboard, aluminum cans, glass, office paper, newspapers, and brown paper bags.
