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The Influence of Visible Light on the Consumption Rate of Expanded Polystyrene by Zophobas morio Larvae
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Experiments testing whether light color affects Zophobas morio larvae's consumption of expanded polystyrene (EPS) found that visible light wavelength influences consumption rates, with findings relevant to understanding how light conditions in waste disposal environments affect biological degradation of polystyrene foam.
The process of disposing of expanded polystyrene (EPS) is by burning it in municipal incinerators. This process gives off EPS microplastics, which can find their way into water, food, blood, and major organ systems. Zophobas morio larvae are capable of consuming and breaking down EPS within their digestive tracts by minimizing the spread of microplastics. Studies of the consumption of EPS by Z. morio larvae are typically conducted under white or no visible light treatments. This study tested whether the color of visible light influenced the consumption rate of EPS by Z. morio larvae. If Z. morio larvae consume EPS under visible light, then visible light will influence the amount of EPS consumed. If results suggest that the consumption rate is influenced by visible light colors, then Z. morio larvae could be a solution for recycling EPS. This study’s procedure placed Z. morio larvae into 25 jars under one of six visible light treatments of red, yellow, green, blue, white, and no visible light. Each jar contained a pre-weighed block of EPS and six Z. morio larvae. After two weeks, the Z. morio larvae were removed from the jars, and the difference between each pre-weighed EPS block and the weight of the same partially consumed block was recorded in three trials. The data indicates that green and blue visible light treatments resulted in the greatest amount of EPS consumed by Z. morio larvae while the red and yellow had the least amount of EPS consumed by the Z. morio larvae. In conclusion, results indicate that green and blue visible light, compared to the no visible light treatment, could be used to influence the Z. morio larvae to consume more EPS. Green and blue visible light and Z. morio larvae could make the recycling process of EPS more environmentally friendly when used in households or by local environmental organizations.
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This study evaluated the ability of Zophobas morio larvae (king worms) to consume expanded polystyrene (EPS) and low-density polyethylene (LDPE), finding that larvae fed oats combined with EPS showed the highest consumption efficiency, averaging 534 mg over the experimental period. Results suggest these larvae are more effective at degrading EPS than LDPE.
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Zophobas atratus larvae (superworms) biodegraded both expanded and extruded polystyrene, with supplement diets of oatmeal, wheat bran, and cornmeal significantly enhancing consumption and degradation rates, and gel permeation chromatography confirming significant molecular weight reduction of the polystyrene.
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Researchers tested the ability of mealworm (Tenebrio molitor) and superworm (Zophobas morio) larvae to biodegrade polystyrene foam through feeding experiments with different dietary conditions. They found that both species could consume and break down polystyrene, with gut microorganisms playing a key role in the degradation process. The study suggests that insect-based biodegradation could offer a biological approach to addressing polystyrene waste in the environment.
Biodegradation of Pristine and Post-Consumer Extruded Expanded Polystyrene Packaging by Zophobas atratus Larvae: Influence of the Larval Stage and Physiological Response
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Researchers evaluated Zophobas atratus larvae (superworm beetles) as biodegraders of expanded polystyrene packaging, finding that larger larvae consumed more material while smaller larvae showed greater enzymatic activity, with both life stages reducing molecular weight and causing oxidative chemical changes. The study demonstrates that Z. atratus can biodegrade both pristine and post-consumer polystyrene, with degradation efficiency depending on larval developmental stage and substrate type.
The interplay of larval age and particle size regulates micro-polystyrene biodegradation and development of Tenebrio molitor L.
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Researchers found that three-month-old mealworm larvae are optimal for polystyrene microplastic biodegradation, showing the highest consumption rates and confirmed depolymerization in their frass, with comparable survival to control groups when co-fed with wheat bran.
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