Bøger af Pratima Bajpai

Recycling and Deinking of Recovered Paper, Second Edition covers recent advances in recycling technologies. This second edition examines this new process, which is more eco-friendly than the virgin-papermaking process, and which uses less energy and natural resources, produces less solid waste and fewer atmospheric emissions, and helps to preserve natural resources and landfill space. In addition, the most recent information about the recycling of fibers into various grades of paper and board, the control of stickies, and the effects of recycled fiber on paper machines are also covered. Recycling technologies have been improved in recent years due to advances in pulping, flotation deinking, and cleaning/screening, resulting in the quality of paper made from secondary fibers remarkably approaching that of virgin paper.

This book provides the most up-to-date and comprehensive information on the state-of-the-art techniques and aspects involved in environment-friendly pulping technologies. Traditional chemical and semi-chemical pulping processes are not environmentally friendly. Therefore, it has become important to look for alternative approaches to mitigate wastewater emissions in the paper industry, by making more stringent regulations to improve environmental conservation. In response to this problem, new raw materials need to be explored to replace traditional choices and also new pulping processes need to be developed based on less polluting, more easily recovered reagents. This book presents new and emerging deep eutectic solvents for lignocellulosic biomass pretreatment, and discusses the effects of deep eutectic solvents on biomass pretreatment and the production of value-added products. It also introduces biotechnological methods of pulping. Biotechnological processes help to make manufacturing processes cleaner and more efficient by reducing toxic chemical pollution and greenhouse gas emissions. Given its scope, this book is of interest to applied chemists, foresters, chemical engineers, wood scientists, along with engineers and researchers involved in the pulp and paper industry as a valuable reference.

This book examines the background of fourth-generation biofuel production, use of genetically modified microalgae for production of fourth-generation biofuels; cultivation and harvesting of genetically modified microalgae; residue from biofuel extraction; health and environmental concerns of fourth-generation biofuels; regulations on cultivation and processing of the genetically modified algae; carbon dioxide sequestration; water footprint and current status and key challenges. The topic caters to academic researchers and industrial experts, who work in the field of biofuels as source of alternative fuel to achieve environmental and economic sustainability.

The book provides the most up-to-date information available on various biotechnological processes useful in the pulp and paper industry.

Growing concerns about the rapid depletion of fossil fuel reserves, rising crude oil prices, energy security and global climate change have led to increased worldwide interest in renewable energy sources such as biofuels.

The information presented will be of interest to all those involved in the investigation of carbon fiber materials, carbon fiber manufacturers and carbon fiber users.

This book presents a state-of-the-art report on the treatment of pulp and paper industry effluents using anaerobic technology. It covers a comprehensive range of topics, including the basic reasons for anaerobic treatment, comparison between anaerobic and aerobic treatment, effluent types suitable for anaerobic treatment, design considerations for anaerobic treatment, anaerobic reactor configurations applied for treatment of pulp and paper industry effluents, present status of anaerobic treatment in pulp and paper industry, economic aspects, examples of full scale installations and future trends.

Green Chemistry and Sustainability in Pulp and Paper Industry

The book describes the pretreatment of lignocellulosic biomassfor biomass-to-biofuel conversion processes, which is an important step inincreasing ethanol production for biofuels.

While conventional air pollution control technologies can treat a wide variety of pollutants at higher concentrations, the chapters cover the more refined biological methods used to deal with odours and volatile organic compounds in low concentrations.

This is the most comprehensive and up-to-date treatment of all aspects of biotechnology in the processing of pulp and paper. Each chapter covers a discrete process or technique, assessing the advantages and limitations of, as well as the prospects for, each.

The book provides an updated and detailed overview on advances in bioethanol. In addition, it presents information about ethanol in different parts of the world and also highlights the challenges and future of ethanol.

This book covers bleach plant effluents, that most polluting effluent from the pulp and paper industry. This book describes environmental impact of bleach plant effluents, environmental regulations, and measures to reduce the pollution load by internal process modification and external treatment of bleach plant effluents.