Can Mycelium Fungus replace Concrete & Plastic?
The Rise of Mycelium Packaging
Introduction to Plastics and Their Impact
- Bakelite, invented in 1907, marked the beginning of modern plastics, leading to synthetic polymers that revolutionized daily life.
- The production of plastics has surged past 300 million tonnes annually, with less than 10% being recycled, contributing to a crisis of single-use plastics.
Mycelium as a Sustainable Alternative
- Mycelium packaging is made from mushrooms and hemp, utilizing the root structure (hyphae) as a biological binder mixed with agricultural waste.
- Ecovative Design, founded in 2006, is a leading manufacturer of mycelium packaging; their process involves creating custom molds and using recyclable plastic trays for production.
Manufacturing Process Overview
- The manufacturing includes routing designs into MDF and thermoforming plastic trays around them before filling with hemp hurd and mycelium blend.
- After growing for seven days in controlled conditions, the product is heat-treated to stop growth and ensure safety.
Environmental Benefits
- Mycelium packaging is biodegradable within 45 days in composting conditions and can last up to 30 years indoors without degrading.
- It serves as a nutrient for soil when decomposed; architects are exploring its use in construction through mushroom bricks.
Innovative Applications
- Notable projects include a temporary tower built in New York using mycelium bricks that could withstand high winds but was composted after three months.
- Other applications include pavilions designed for World Expos that utilize biodegradable materials to reduce waste from large events.
Advancements Beyond Packaging
- Biohm's mycelium insulation panels outperform traditional materials like rockwool regarding thermal capacity and fire resistance.
- Ecovative also explores various products including mycelium leather and plant-based meat alternatives.
Advantages of Mycelium Products
- These products are non-toxic, energy-efficient during production, Cradle to Cradle Gold certified, and provide effective protection similar to petroleum-based foams.
Challenges Facing Adoption
- Despite advantages like water resistance and low greenhouse gas emissions during production, challenges include limited strength (18 psi compressive strength).
- The short lifespan (20–30 years), patent barriers by producers, and the low cost of conventional plastic hinder widespread adoption.
Mycelium Packaging and Its Challenges
The Potential of Mycelium in Construction
- Mycelium packaging is being explored as a competitor to traditional materials, but its heavier weight may increase shipping costs.
- There are bold claims surrounding mycelium's potential, such as "Your next house could be made of mushrooms" and "Mushrooms can save the world," highlighting the optimism in using fungi for construction.
- Building with living mycelium presents significant challenges; substrates like straw or hemp stalks decompose over time, compromising structural integrity.
Innovative Approaches to Housing
- Redhouse Architecture, a Cleveland firm, is developing a biocycling process that involves demolishing derelict homes and combining waste with mycelium to create new building materials.
- This innovative approach aims to address disaster relief housing needs and contribute solutions to the ongoing housing shortage.
Realistic Challenges in Recycling
- The process of separating components of a house (drywall, insulation, wood studs, etc.) is labor-intensive and energy-consuming; simply pulverizing old homes isn't feasible.
- The plastic industry has been criticized for its complacency regarding recycling efforts; there is hope that increased competition will drive more responsible practices.