tailieunhanh - Environmental aspects of textile dyeing - Chapter 6

"Save the Earth để tiết kiệm tương lai". Ngay từ khởi đầu của quá trình đô thị hóa và công nghiệp với những tiến bộ trong khoa học công nghệ, nó đã dần dần nhận ra rằng sự tăng trưởng không thể được coi là một điều tốt nếu chúng ta bỏ qua các môi trường mà chúng ta đang sống. Các hóa chất công nghiệp dệt may gia công có tầm quan trọng của riêng của nó, là một trong những nhu cầu cơ bản của xã hội và hiện nay nó là ở giữa của một chuyển dịch. | 6 Pollution abatement and waste minimisation in textile dyeing S. R. S H U K L A Mumbai University Institute of Chemical Technology India Introduction Save the Earth to save the future . Right from the inception of urbanisation and industrialisation with advancement in science of technology it was gradually realised that growth cannot be considered to be a good thing if we ignore the environment in which we live. The textile chemical processing industry has importance of its own being one of the basic needs of society and currently it is in the midst of a major restructuring and consolidation phase with the emphasis on product innovation rebuilding and environmental friendliness. Given the dynamic nature of the textile wet processing industry in India as well as in other countries and its tremendous potential this chapter aims to focus on the sources of water pollution as well as pollution minimisation and prevention strategies followed by some suggestions and possible future trends in dyeing operations to protect the environment. The terms pollution and contamination are sometimes used interchangeably in environmental matters to describe the introduction of a substance at a concentration sufficient to be offensive or harmful to human animal or plant life. The word pollution is more strictly used to describe contamination caused or induced by human activities and is typically measured by reference to predetermined permissible or recommended tolerance limits. The textile industry has a major impact not only on the nation s economy but also on the economic and environmental quality of life in many communities. Textile processing generates various types of waste streams including water-based effluent as well as air emissions solid wastes and hazardous wastes. The nature of the waste generated depends on the types of fibres and the chemicals used the type of textile facility and the processes and technologies being operated. In quantity wastewater generation is a .