Bøger af Alok Prasad Das

The majority of clothes we use regularly are made up of plastic-based materials like polyester, rayon, nylon, and acrylic. When these garments are washed in laundries, they give out tiny plastic fragments termed microfibers which end up in the environment and more precisely in the oceans. Plastic and synthetic polymer wastes which are often irresponsibly discarded into natural habitats undergo bio-fragmentation to give out huge amounts of microplastics and microfibers. Synthetic microfiber pollution has been reported in diverse ecosystems ranging from land and aquatic ecosystem to shorelines and seafloors. Due to the miniature size of the microfibers, it is difficult to detect, investigate, and prevent this type of pollution that is occurring on a larger scale. It is estimated that millions of tons of microfibers are released into the ocean from various sources. They are more toxic because they are more persistent and take a long time to degrade, and it gets accumulated in the environment along with other pollutants. This increases the chances of living organisms in the biosphere ingesting the synthetic microfibers causing harm to the ecosystem and entering into the food chain adversely affecting human beings. It had become a great field of research because of its abundance and the challenges in the identification of synthetic and semisynthetic microfibers from the environmental samples and the time it takes to be degraded. This book focuses on renewable energy generation and value addition from environmental microfiber pollution through advanced greener solution, thus building an economic supportable society as an elementary need of developing countries.

This book focuses on challenges that have arisen because of trash discharges and their potential causes and provides long-term sustainable solutions. Globally, the COVID-19 pandemic has caused immense devastation, leading to numerous fatalities as well as substantial economic losses and health issues. With the rise in COVID-19 cases, the amount of biomedical waste has multiplied, exposing more people to the epidemic. For developing countries, waste management is already a problem, and the waste generated during this pandemic situation has made things worse. If improper waste management techniques are not changed, the world will face a new crisis that could be referred to as a "garbage crisis." The increased quantity of COVID-19-associated waste (CAW) and their presence in the environment make them more vulnerable, potentially increasing the danger of food chain contamination. A few countries have already started putting emergency plans in place to address the "waste crisis." Given the paucity of information on the mutational features and potential hosts of this newly discovered COVID-19, there is a pressing need for an effective plan to protect India's ecosystem against further contamination. To handle the current crisis and prevent the anticipated waste disaster, it is imperative to construct a more effective, automated, computerized, and well-modified waste management system during the COVID-19 period.

The purpose of this book is to discuss the challenges that have arisen due to petroleum hydrocarbon wastes, their harmful effects to the ecosystem, and limitations as well as improvement of current biological techniques¿ use for management of petroleum hydrocarbon wastes. This book focuses on the role of advanced green engineering technologies for sustainable petroleum waste management in building an economic supportable society as a basic need of developing countries. The rapid economic growth achieved in last decade has been paralleled by an increase in global energy consumption resulting generation of massive amount of industrial wastes. Petroleum wastes release through spillages and leakage from underground tanks, steamers, unplugging of oil wells, and abandoned oil refinery sites that cause extensive contamination of surface soils, groundwater, seas, and ocean resulting in ecosystem damage. Apart from these, petroleum industries release a significant amount of hydrocarbonwastes during processing of crude oil. Improper waste management technique of these petroleum wastes may cause a serious effect toward the living beings. The presence of these hazardous wastes in the environment will make vulnerable conditions to the aquatic as well as terrestrial life. Till date, a number of conventional techniques have been implemented to treat these petroleum hazardous wastes, but biological treatment is more efficient among all on basics of economic and environmental point of view. Bioaugmentation, biostimulation, and combinatorial bioaugmentation and biostimulation waste management strategies are implemented to treat these wastes. In addition to these techniques, biocomposting/biopile, land treatment, and bio-slurry methods have also been employed to reduce the endanger effects of petroleum wastes. Integrating waste management through environmental sustainability and economic development is one of the prime milestones in the circular economy. There is anexigent necessity for developing countries to go ahead toward a circular economy for achieving its Sustainable Development Goals.