Isolation and Identification of Polystyrene Degrading Bacteria from Zophobas morio’s Gut

Tan, Kian Meng; Fauzi, Noor Akhmazillah Mohd; Kassim, Amir Hashim Mohd; Razak, Aliff Hisyam A; Kamarudin, Kamarul Rahim

doi:10.48048/wjst.2021.9118

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…Regular aggregate can be partially or wholly replaced with lightweight aggregate in lightweight concrete, depending on the desired density and strength requirements [8]. The current study uses expanded polystyrene (EPS) beads as lightweight aggregates in mortars and concrete that incorporate silica fume as an additional cementitious material [9].…”

Section: Introductionmentioning

confidence: 99%

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Development of lightweight building blocks using expanded polystyrene

Moudud Ahmmed,

Zainul Abedin,

Subrata Paul

et al. 2023

GSC Adv. Res. Rev.

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This study aimed to develop lightweight building blocks using Expanded Polystyrene (EPS) with varying percentages, assess their properties, including density, water absorption, porosity, and compressive strength, and evaluate the unit cost of the blocks. The heat-passing rate of the blocks was also investigated. EPS blocks were produced at the Concrete and Materials Testing Laboratory in the Farm Structure and Environmental Engineering Department, Bangladesh Agricultural University, Mymensingh. Local sand and ordinary Portland cement were utilized, with the EPS bead sizes ranging from 2.36mm to 6.35mm. Five different percentages of EPS beads (0%, 5%, 10%, 15%, and 20%) were selected for each block, and the cement-to-sand ratio was 1:4. A total of 75 EPS blocks were fabricated and cured in water for 28 days. The results showed that the density was highest for 0% EPS blocks (2139.75 kg/m3) and lowest for 20% EPS blocks (1699.08 kg/m3). Water absorption was most insufficient for 0% EPS blocks (4.39%) and highest for 20% EPS blocks (9.07%). The porosity was highest for 20% EPS blocks (14.37%) and lowest for 0% EPS blocks (6.74%). The heat passing rate was minimal for 0% EPS blocks and highest for 20% EPS blocks. Compressive strength was highest for 0% EPS blocks (13.37 MPa), moderate for 10% EPS blocks (10.87 MPa), and lowest for 20% EPS blocks (8.94 MPa). The unit cost of 100 blocks was highest for 0% EPS blocks (15.18 USD) and lowest for 20% EPS blocks (13.28 USD). Overall, the EPS blocks are recommended for construction due to their durability and compressive strength.

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Section: Introductionmentioning

confidence: 99%

“…The recycled polystyrene is processed back into EPS beads or regrind material and mixed with additives and cement to form lightweight concrete blocks. Typically, the composition of polystyrene concrete includes recovered polystyrene granules, cement silica aggregate, and modifying agents such as setting accelerators [8] .…”

Section: Introductionmentioning

confidence: 99%

Development of lightweight building blocks using expanded polystyrene

Moudud Ahmmed,

Zainul Abedin,

Subrata Paul

et al. 2023

GSC Adv. Res. Rev.

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“…Desde hace algunos años se planteó el uso de metodologías biotecnológicas para buscar soluciones sostenibles y efectivas para el tratamiento de desechos plásticos. Entre estas herramientas está el manejo de microbiota intestinal de invertebrados como los insectos (An et al, 2023;Tan et al, 2021;Yang et al, 2015).…”

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Entomoremediación: Influencia de una Dieta Plástica en el Desarrollo de Tenebrio Molitor para Generar Biofertilizante

Bastidas-Proaño

2024

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El plástico es ampliamente utilizado y responsable de impactos ambientales negativos. Tal es el caso del poliestireno expandido (EPS), que presenta desafíos de revalorización por su baja densidad. Aunque ciertas larvas de insecto, como tenebrio molitor, han demostrado la capacidad de mineralizar plásticos, la insecticultura de estos aún se enfoca en obtener proteína sostenible y biofertilizante. En este estudio, se investiga la influencia de una dieta de EPS en el desarrollo larval de T. molitor durante 6 meses, y se examina cómo la dieta afecta el volumen de biofertilizante recolectado en este lapso. Se desarrollaron ensayos con tres dietas, realizando mediciones y recolección de material de manera periódica. Los resultados indican que las larvas alimentadas con un sustrato combinado, así como aquellas con una dieta orgánica, demuestran tasas de supervivencia de hasta 66%. La longitud final es inferior en la dieta inorgánica (112mm), y en las otras dietas superan los 162 mm. Las larvas de una dieta inorgánica no progresaron a pupa, demostraron un Factor de Conversión de Alimento desalentador (3,87) y produjeron menor cantidad de frass/biofertilizante (1,28g), en comparación con la dieta combinada que registró 5,11g. Los datos sugieren que la entomoremediación plástica funciona óptimamente si se cría larvas en un sustrato combinado de EPS y elementos orgánicos. Dicha condición no solo produce resultados positivos, sino que se alinea con los principios de economía circular. En consecuencia, se demuestra que una dieta combinada es ideal para abordarla como opción en el tratamiento de residuos de EPS.

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Radical innovation breakthroughs of biodegradation of plastics by insects: history, present and future perspectives

Yang,

Wu,

Bertocchini

et al. 2024

Front. Environ. Sci. Eng.

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Insects damaging and penetrating plastic packaged materials has been reported since the 1950s. Radical innovation breakthroughs of plastic biodegradation have been initiated since the discovery of biodegradation of plastics by Tenebrio molitor larvae in 2015 followed by Galleria mellonella in 2017. Here we review updated studies on the insect-mediated biodegradation of plastics. Plastic biodegradation by insect larvae, mainly by some species of darkling beetles (Tenebrionidae) and pyralid moths (Pyralidae) is currently a highly active and potentially transformative area of research. Over the past eight years, publications have increased explosively, including discoveries of the ability of different insect species to biodegrade plastics, biodegradation performance, and the contribution of host and microbiomes, impacts of polymer types and their physic-chemical properties, and responsible enzymes secreted by the host and gut microbes. To date, almost all major plastics including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyurethane (PUR), and polystyrene (PS) can be biodegraded by T. molitor and ten other insect species representing the Tenebrionidae and Pyralidae families. The biodegradation processes are symbiotic reactions or performed by synergistic efforts of both host and gut-microbes to rapidly depolymerize and biodegrade plastics with hourly half-lives. The digestive ezymens and bioreagents screted by the insects play an essential role in plasatic biodegradation in certain species of Tenebrionidae and Pyralidae families. New research on the insect itself, gut microbiomes, transcriptomes, proteomes and metabolomes has evaluated the mechanisms of plastic biodegradation in insects. We conclude this review by discussing future research perspectives on insect-mediated biodegradation of plastics.

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Isolation and Identification of Polystyrene Degrading Bacteria from Zophobas morio’s Gut

Cited by 6 publications

References 26 publications

Development of lightweight building blocks using expanded polystyrene

Development of lightweight building blocks using expanded polystyrene

Entomoremediación: Influencia de una Dieta Plástica en el Desarrollo de Tenebrio Molitor para Generar Biofertilizante

Radical innovation breakthroughs of biodegradation of plastics by insects: history, present and future perspectives

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