6 Biodeinking: an eco-friendly alternative for chemicals based recycled fiber processing

2021 ◽  
pp. 129-154
Author(s):  
Varun Kumar ◽  
Puneet Pathak ◽  
Nirmal Sudhir Kumar Harsh ◽  
Nishi Kant Bhardwaj
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Varun Kumar ◽  
Puneet Pathak ◽  
Nirmal Sudhir Kumar Harsh ◽  
Nishi Kant Bhardwaj

Abstract Recycling of recovered paper is an inevitable process for saving resources and the environment. Due to strict forest conservation regulations and limitations of the agro-forestry sector, the paper industry is facing the woody fiber crisis for decades. The recycling of waste paper for its utilization as a source of cellulosic fibers for papermaking is a resource-saving and eco-friendly approach and is a need of time. Deinking is an important stage in the recycling of recovered paper. In the conventional deinking process, chemicals have been used for removal of inks and other impurities from waste paper pulp slurry with some certain drawbacks like deinking inefficiency, fiber damage and generation of chemicals and fiber-rich effluent. The application of enzymes for deinking purposes is known as biodeinking and is considered as the potent and environmentally friendly deinking approach. The present write-up provides comprehensive information on various aspects of biodeinking.


2018 ◽  
Vol 1 (3) ◽  
pp. 233-244 ◽  
Author(s):  
Shiv Shankar ◽  
Shikha ◽  
Chandra Bhan ◽  
Rajesh Chandra ◽  
Sanjay Tyagi

2020 ◽  
Vol 35 (8) ◽  
pp. 787-807
Author(s):  
Helen X Trejo ◽  
Tasha L Lewis

Inspired by the slow fashion movement, this is an exploratory case study focused on New York’s raw fiber-to-retail value chain for local clothing and textiles. New York has over 470 diverse sheep, alpaca, goat farms, fiber processing mills for product development, and fiber festivals for retail. A survey with farmers presents their motives for establishing a fiber farm business, diverse fibers available, fiber products, income, and their multiple retail venues. Interviews were conducted with farmers, fiber mill owners, and artisan designers. Primary research objectives included: (1) determining how fiber farms, mills, artisans, fiber festivals, and fiber agro-tourism intersect to sustain the current fiber community; (2) evaluating the major challenges the fiber community faces; (3) determining if stakeholders of the fiber community have benefited from any policies; and (4) understanding future goals New York raw fiber-to-fashion stakeholders have to sustain the local fiber community. Interviews reveal several leadership initiatives developed by fiber farmers to address challenges of finding a market, limited income, and fiber mill closures. This study uses the five key dimensions of slow fashion as a framework to evaluate New York raw fiber-to-retail.


2009 ◽  
Vol 517 (15) ◽  
pp. 4348-4354 ◽  
Author(s):  
Junlong Song ◽  
Jing Liang ◽  
Xiaomeng Liu ◽  
Wendy E. Krause ◽  
Juan P. Hinestroza ◽  
...  

TAPPI Journal ◽  
2020 ◽  
Vol 19 (5) ◽  
pp. 239-246
Author(s):  
XIAONING SHEN ◽  
BO LI ◽  
WENXUAN MO ◽  
XIN-SHENG CHAI

This paper presents data on the effects of operational parameters (number of revolutions, linear pressure, and gap) of the PFI refiner on the swellability of recycled fiber, which was characterized by water retention value (WRV). The results showed that the increase of recycled fiber’s WRV was proportional to the number of revolutions and the linear pressure, but inversely proportional to the gap. The mathematical relation between these parameters and the fiber WRV could be described by an empirical model for gaps greater than 0.1 mm. Scanning electron microscopic images of fiber morphology showed that the basic framework of fibers could be maintained with the gap greater than 0.1 mm, but was destroyed with smaller gaps. This model provides a technical reference for quantitative control of refining treatment and an effective method for improving recycled fiber quality.


Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2774 ◽  
Author(s):  
Yan Zhao ◽  
Ye Yuan ◽  
Xinyu Zhang ◽  
Yumei Li ◽  
Qiang Li ◽  
...  

Pectate lyase (EC 4.2.2.2) catalyzes the cleavage of α-1,4-glycosidic bonds of pectin polymers, and it has potential uses in the textile industry. In this study, a novel pectate lyase belonging to polysaccharide lyase family 10 was screened from the secreted enzyme extract of Paenibacillus polymyxa KF-1 and identified by liquid chromatography-MS/MS. The gene was cloned from P. polymyxa KF-1 genomic DNA and expressed in Escherichia coli. The recombinant enzyme PpPel10a had a predicted Mr of 45.2 kDa and pI of 9.41. Using polygalacturonic acid (PGA) as substrate, the optimal conditions for PpPel10a reaction were determined to be 50 °C and pH 9.0, respectively. The Km, vmax and kcat values of PpPel10a with PGA as substrate were 0.12 g/L, 289 μmol/min/mg, and 202.3 s−1, respectively. Recombinant PpPel10a degraded citrus pectin, producing unsaturated mono- and oligogalacturonic acids. PpPel10a reduced the viscosity of PGA, and weight loss of ramie (Boehmeria nivea) fibers was observed after treatment with the enzyme alone (22.5%) or the enzyme in combination with alkali (26.3%). This enzyme has potential for use in plant fiber processing.


Polymer ◽  
2001 ◽  
Vol 42 (21) ◽  
pp. 8529-8540 ◽  
Author(s):  
Werner Grasser ◽  
Hans-Werner Schmidt ◽  
Reiner Giesa

Sign in / Sign up

Export Citation Format

Share Document