Utilization of fruits and vegetable wastes are one of the important and challengeable works around the world. Orange peels are one of fruit waste generated mainly by the juicing industries that cause environmental problems due to its large volume of generation and physicochemical characteristics, such as soil and water pollution. Meanwhile, textile industry has been growing interest on utilization of bioresource waste derived from fruits as an important step toward sustainable development. Recently, researchers have developed various luxury materials using fruit waste from pineapple, apple, grape, and banana etc. Similarly, orange peel wastes are used as a source of natural dye, green absorber, mosquito repellent, perfume retention agent, and antimicrobial agent, and produced a luxury fiber in textile industry. This review describes the various application of orange peel waste as sustainable material in textile industry.

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The present work involves the optimization of extraction and dyeing recipes to standardize the procedure for natural dye obtained from the roots of Ratanjot (Onosma echiodes) using ultrasonic waves. The resultant dye obtained at optimized extraction conditions was applied on wool fabric to study the effect of temperature, dye concentration, time and dyeing pH. Optical density and colour strength (K/S value) were studied for evaluation of optimum extraction and dyeing conditions. It was observed that extraction and dyeing parameters have significant effect on colour characteristics of dyed wool fabric. The optimized extraction conditions were; dye extraction pH 7, extraction time 60 min and temperature 60ºC while optimized dyeing parameters were; dyeing temperature 60°C,  dye concentration 2 g/g, dyeing time 75 min and dyeing pH 5. It was also observed that the optimum dye extraction time and pH is same with the conventional heating method but there is reduction in the temperature (60°C), dyeing time and dye concentration consumption in ultrasonic extraction and dyeing method, thus saves the energy, time and amount of dye requirement. Therefore, ultrasound wave represents a promising method for increasing diffusion of dye by the effect of cavitation, as well as for improving the effectiveness of processes as compare to conventional heating method.

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Presently, sustainability became a key mantra in all the industries across the world, especially the textile sector as it is one of the largest industries in the world. In textile science, natural fibres have a big role in a sustainable environment-friendly future and became a significant topic to exploit a new natural resource which is green and environment-friendly. Considering this, fibres from various sources were explored by many researchers for its potentialities in improving the quality of life around the world. Aloe vera, banana, sisal, hemp, jute, bamboo, milk fibre, corn, soya, groundnut shell, arecanut, coffee bean waste, lyocell and eucalyptus were few among them. Each year, more synthetic fibres and high energy-consuming products are being replaced by natural-fiber-based products. Additionally, natural fibres have been used not only for clothing but also for technical applications such as composite materials, building materials, filtration and insulation materials. The reason for this trend is not only due to increase environmental awareness but also because of its excellent properties, such as lightweight, strength, low costs and simple sourcing. Meanwhile,waste utilization became one of the important and challengeable jobs around the world. The Textile industry has obtained many fibres from bioresource waste as an important step toward sustainable development. As for example, Pinafibre is a minor fibre obtained from waste pineapple leaves. The study attempted to review some of the selected new sustainable fibres from waste materials and their application in textiles.