Biodegradable Bottle Cap Using Fungal Enzymes to Consume Plastic Waste

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Solution Overview

Problem

Millions of plastic water bottles end up in waste due to low recycling rates, and existing alternatives like the Ooho drinking capsule are too fragile and unsuccessful in replacing plastic bottles.

Innovation Solution

A biodegradable plastic bottle cap containing the plastic-eating fungus 'Pestalotiopsis microsporia' that breaks down the bottle and cap within weeks, housed in an aluminum casing to prevent premature degradation, with a tab mechanism for controlled release and safe food dye for accidental leakage detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If plastic bottles are used for packaging drinking water, then durability and protection are improved, but waste accumulation and environmental harm worsen

Engineering Contradiction:

Improvebottle durabilityVSAvoidplastic waste

Core Design Contradiction:

StrengthVSLoss of substance

Solution Approach 1:

The fungus is pre-loaded in the cap before the bottle is used. When the tab is pulled after consumption, the fungus is released into the bottle to begin biodegradation immediately, eliminating the need for separate disposal processes and ensuring the plastic breaks down naturally without persisting in the environment

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The fungus Pestalotiopsis microsporia acts as a biological intermediary that mediates between the plastic bottle and the environment. It consumes the plastic polymer as its food source, converting persistent plastic waste into biological mass that can be naturally decomposed, thus bridging the gap between durable plastic and environmental safety

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of substance

If algae-based capsules like Ooho are used to replace plastic, then environmental biodegradability is improved, but structural strength and reliability worsen

Engineering Contradiction:

ImprovebiodegradabilityVSAvoidcapsule strength

Core Design Contradiction:

Loss of substanceVSReliability

Solution Approach 1:

Different parts of the packaging system have different material properties optimized for their specific functions: the bottle body remains plastic for durability and protection, while the cap contains the biodegradable fungus component for environmental breakdown, creating a hybrid system that achieves both strength and biodegradability in appropriate locations

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention creates a composite packaging system combining plastic (for structural integrity) with biological fungus material (for biodegradation). This composite approach allows the system to exhibit both the strength of plastic and the environmental benefits of biodegradable materials, resolving the contradiction between durability and eco-friendliness

Inventive Principle:

Principle #40Composite materials

3Productivity

If the fungus is released immediately into the bottle, then biodegradation speed is improved, but premature consumption of the cap and accidental activation worsen

Engineering Contradiction:

Improvebiodegradation speedVSAvoidcontrolled release

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The cap is segmented into functional zones: an aluminum casing that protects the fungus, a plastic body that the fungus cannot consume, and a tab mechanism that controls release. This segmentation allows the fungus to be contained safely until needed, then released rapidly for efficient biodegradation without premature activation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fungus is extracted from the cap body and housed separately in an aluminum casing within the cap structure. This extraction protects the fungus from accidentally consuming the cap while allowing controlled release into the bottle when the tab is pulled, ensuring both safety and effectiveness

Inventive Principle:

Principle #2Taking out (Extraction)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Effectively reduces plastic bottle waste by biodegrading the bottle and cap within weeks, while maintaining the use of plastic and ensuring environmental safety through controlled fungus release and non-toxic dye indication.

Implementation Method 1

The bottle is expected to be biodegraded by plastic-eating fungus 'pestalotiopsis microsporia' in few weeks' time instead of hundreds of years

Methodology Applied

Scientific EffectBiodegradation: Decomposition (biological)

Implementation Method 2

the fungus consumes the plastic bottle and the cap so no trace is left behind

Methodology Applied

Scientific EffectFungal decomposition: Decomposition (biological)

Implementation Method 3

Also contain in the casing is the safe food dye which will be colouring the water in case of accidental release or opening of the casing before the use of the drinking water

Methodology Applied

Scientific EffectColor indication:

Data Source

PatentUS11472617B2Biodegradable bottle cap using <i>Pestalotiopsis microsporia </i>to biodegrade waste plastic bottle

Publication Date: 2022.10.18 INNOWAYTORS LLC

AI summary

Millions of plastic water bottles going to waste and harming the environment. Recycling is an option, but hardly becoming a practice. Biodegradable bottle cap consisting of the plastic-eating fungus ‘pestalotiopsis microsporia’, will consumes the plastic bottle and the cap so no trace is left behind. The cap is made of plastic and the fungus is contained in an aluminium casing.