Method for Zero-Waste Circular Economy Using Worms for Plastic Agriculture: Augmenting Polystyrene Consumption and...

Area of Science:

• Environmental Science
• Entomology
• Bioremediation

Background:

• Polystyrene (PS) is a persistent environmental pollutant due to its resistance to biodegradation.
• Mealworms (Tenebrio molitor) and superworms (Zophobas morio) have demonstrated the ability to consume and degrade PS.
• Worm frass is a potential byproduct for use as a plant fertilizer.

Purpose of the Study:

• To investigate the impact of food additives on PS consumption by mealworms and superworms.
• To evaluate the efficacy of worm frass as a plant fertilizer for dragon fruit cacti (Hylocereus undatus).
• To explore a zero-waste bioremediation cycle for plastic waste and urban farming.

Main Methods:

• Mealworms and superworms were fed polystyrene with varying food additives (sucrose, bran).
• The resulting worm frass was used as a growth medium for dragon fruit cacti.
• Plant growth and root development were monitored over a two-week period.

Main Results:

• Small amounts of sucrose and bran enhanced PS consumption by the worms.
• Worm frass, particularly from superworms, effectively supported dragon fruit cactus growth and rooting.
• Superworm frass outperformed mealworm frass and control media in promoting plant development.

Conclusions:

• Mealworms and superworms offer a natural, non-toxic method for polystyrene degradation.
• Worm frass is a viable and effective organic fertilizer, with superworm frass showing superior results.
• This research presents a sustainable, zero-waste approach to simultaneously address plastic pollution and urban agriculture challenges.