Microbial assemblage for solid waste bioremediation and valorization with an essence of bioengineering

Ghosh, Dipankar; Ghorai, Palash; Sarkar, Soumita; Maiti, Kumar Sagar; Hansda, Serma Rimil; Das, Parna

doi:10.1007/s11356-022-24849-x

Cited by 7 publications

(3 citation statements)

References 150 publications

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“…Microbes may also be present in the bags, producing methane gas from contaminants. According to Ghosh et al [23], microorganisms can help break down the used plastic; however, this was not the aim of this project.…”

Section: Discussionmentioning

confidence: 98%

Investigation of Gas Release from Recycled Plastic Shopping Bags during Melting at Low Temperatures

Eberhard,

Bowtell,

Lenske

et al. 2023

Advances in Materials Science and Engineering

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Recycling plastic is an excellent way to reduce the environmental impact of its production and use. In a circular economy, recycling of recycled plastic is necessary. Most plastic bags are made of thermoplastic, like high-density polyethylene (HDPE) with a melting point of 130°C, and low-density polyethylene (LDPE). In contrast, recycled plastic bags are made up of many different unknown substances. In this study, the melting of used plastic bags containing 80% unknown recycled material was investigated. FTIR analysis showed that the bags consisted mainly of HDPE. The bags were melted at 160°C, 200°C, and 250°C for 30 min. GC-FID and HP-SPME GCMS analyses showed that the bags released flammable gases (methane, ethylene, and alkane/alkene hydrocarbons) but little acetylene. Aromatic and aliphatic hydrocarbons eluded from the bags at 10% of the gas volume at 250°C. Long-chain alkanes, mostly hexadecane, were the dominant compound, amounting to 28% at 160°C and increasing to 43% at 250°C. On the other hand, alkenes decreased with a rising temperature (23% at 160°C to 3% at 250°C), as they were transformed into alkanes. Methylated compounds, for example, methylated alkanes at 10%, were present at all temperatures. Methane and methylated compounds are released from plastic and contamination of the bags with organic matter. The bags released small amounts of toxic phthalates. The results show that melting recycled plastic bags for remoulding is promising if safety precautions that ensure sufficient ventilation are utilised.

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Section: Discussionmentioning

confidence: 98%

Investigation of Gas Release from Recycled Plastic Shopping Bags during Melting at Low Temperatures

Eberhard,

Bowtell,

Lenske

et al. 2023

Advances in Materials Science and Engineering

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“…In recent years, bioremediation has become increasingly favoured for cleaning up of Hg polluted environments (Ghosh et al, 2023).…”

Section: Intrinsic and Engineered Microbial Bioremediationmentioning

confidence: 99%

“…In recent years, bioremediation has become increasingly favoured for cleaning up of Hg polluted environments (Ghosh et al, 2023). Mercury‐resistant bacteria harbouring mer genes have been used for the detoxification of mercuric compounds via reduction and adsorption processes (Krout et al, 2022).…”

Section: Microbial Bioremediationmentioning

confidence: 99%

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

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Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

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Valorization of Solid Waste Products from a Variety of Sectors in Wastewater Treatment Processes

El-Emam

2024

Springer Water

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Microbial assemblage for solid waste bioremediation and valorization with an essence of bioengineering

Cited by 7 publications

References 150 publications

Investigation of Gas Release from Recycled Plastic Shopping Bags during Melting at Low Temperatures

Investigation of Gas Release from Recycled Plastic Shopping Bags during Melting at Low Temperatures

Bioremediation of mercury contaminated soil and water: A review

Valorization of Solid Waste Products from a Variety of Sectors in Wastewater Treatment Processes

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