scholarly journals Feasibility Study of Integrated Desizing, Scouring and Bleaching of Cotton Woven Fabric with H2O2 and Investigation of Various Physical Properties with Traditionally Treated Fabric

2016 ◽  
Vol 12 (33) ◽  
pp. 26
Author(s):  
Md. Golam Nur ◽  
M. Forhad Hossain ◽  
Mustafijur Rahman
Keyword(s):  
Physical Properties ◽  
Research Work ◽  
Woven Fabric ◽  
Time Saving ◽  
Treatment Processes ◽  
Traditional Preparation ◽  
Energy Conserving ◽  
Pre Treatment ◽  
Fabric Weight ◽  
Preparation Techniques

Pre-treatment plays a significant role for the successful coloration of any kind of natural textile fiber like cotton, wool, flax, silk etc. This research work overview the influence of various types of traditional preparation techniques applied on cotton fiber before coloration such as desizing, scouring and bleaching. The traditional pre-treatment processes consume plenty of environmentally unfriendly chemicals those generate pollution in the effluents. In this research work an endeavour has been made to desize, scour and bleach grey cotton woven fabric simultaneously using caustic soda and hydrogen peroxide. The physical properties like whiteness, percent loss in fabric weight, tensile strength of the treated fabric have been compared with those of the fabric treated to conventional desizing, scouring and bleaching process. It is observed that the whiteness (ready for colouration) obtained by this process is quite satisfactory. Moreover, this process has some other merits such as ecological, economical, energy conserving and time saving aspect.

Prospects and problems of sludge pre-treatment processes

2001 ◽  
Vol 44 (10) ◽  
pp. 121-128 ◽  
Author(s):  
J.A. Müller
Keyword(s):  
Wastewater Treatment ◽  
Phase Changes ◽  
Ozone Treatment ◽  
Thermal Methods ◽  
Sludge Treatment ◽  
Freeze Thaw ◽  
Positive Effects ◽  
Treatment Processes ◽  
Stage Of Development ◽  
Pre Treatment

Pre-treatment processes have been developed in order to improve subsequent sludge treatment and disposal. Disintegration of sludge solids in the aqueous phase changes the sludge structure and solubilizes organic matter. This paper provides an overview of the applications of wet disintegration in wastewater and sludge treatment. Applied disintegration techniques such as mechanical, thermal, chemical and biological methods are briefly described. The methods are compared regarding energy consumption, operational reliability and stage of development for application on wastewater treatment plants. Mechanical and thermal methods appear to be most suitable at this stage. The effects of pre-treatment on subsequent sludge treatment processes and the wastewater treatment are described. The performance of various methods is assessed. For the improvement of stabilization, mechanical and ozone treatment as well as thermal treatment perform best. Dewatering can be enhanced by thermal and freeze/thaw treatment. All methods show positive effects in the reduction of the number of pathogens. Pre-treatment leads to secondary effects like the generation of recalcitrant compounds and odor, which is mainly a problem of thermal and ozone treatment. The evaluation of capital and operational costs is difficult, because of the lack of full-scale experience. Especially thermal, freeze/thaw and biological treatments can be realized at low costs if the conditions are appropriate. Nevertheless, the economic efficiency has to be investigated critically for each individual application.

scholarly journals Preparation and application of different size materials on the cotton yarn and investigating the effect of sizing on the tensile properties of cotton yarn

2014 ◽  
Vol 49 (1) ◽  
pp. 25-30
Author(s):  
S Sultana ◽  
MZ Haque ◽  
HP Nur
Keyword(s):  
Tensile Properties ◽  
Water Soluble ◽  
Woven Fabric ◽  
Seed Kernel ◽  
Cotton Yarn ◽  
Textile Production ◽  
Tamarind Seed ◽  
Different Types ◽  
Cotton Yarns ◽  
Pre Treatment

Sizing of the cotton yarn is essential to reduce breakage of the yarn due to abrasion during weaving process. The sizing agent on the woven fabric after weaving needs to remove completely before the next textile production process of dyeing and finishing. So, water soluble sizing agent is easy to handle and easy to desizing for pre-treatment of woven fabric. In this work, different types of water soluble tamarind seed kernel based sizing formulations (assigned by A, B and C) were made and applied on cotton yarn to investigate the effect on the tensile properties of sized and unsized cotton yarns. Cotton yarn treated with size B formulation shows the better tensile properties than the application of size A and size C formulation. The effect of lubricant has also been investigated and shows that the addition of lubricant decreases the tensile properties of the cotton yarn. DOI: http://dx.doi.org/10.3329/bjsir.v49i1.18850 Bangladesh J. Sci. Ind. Res. 49(1), 25-30, 2014

Investigation and assessment of sludge pre-treatment processes

2004 ◽  
Vol 49 (10) ◽  
pp. 97-104 ◽  
Author(s):  
J.A. Müller ◽  
A. Winter ◽  
G. Strünkmann
Keyword(s):  
Fine Particles ◽  
Degradation Process ◽  
Solid Content ◽  
Ozone Treatment ◽  
Treatment Processes ◽  
Sludge Properties ◽  
Pre Treatment ◽  
The Cost ◽  
Degree Of Degradation ◽  
Cell Disintegration

The pre-treatment of sludges by disintegration will result in a number of changes in sludge properties. Floc destruction as well as cell disintegration will occur. This leads to an increase of soluble substances and fine particles. Furthermore, biochemical reactions may appear during or immediately after disintegration. The influence of disintegration of excess sludge on anaerobic digestion was studied in full scale. A stirred ball mill, an ultrasound disintegrator, a lysate centrifuge and ozone treatment were used. The results of the degradation process were compared to a reference system without pre-treatment. An enhancement of the degree of degradation of 7.4% to 20% was observed. The pollution of sludge water as well as the dewatering properties of the digested sludge were investigated. COD and ammonia in the sludge water were increased and a higher polymer demand was observed while the solid content after dewatering stayed almost unchanged. Based on these results the cost effectiveness has been assessed taking into account different conditions (size of WWTP, cost for disposal, etc.). Capital and energy costs are the main factors while the decrease in disposal costs due to the reduced amount of sludge is the main profit factor.

scholarly journals EFFECT OF SPANDEX DENIER OF WEFT CORE SPUN YARN ON PROPERTIES OF FINISHED STRETCH WOVEN FABRIC

2020 ◽  
Vol 7 (7) ◽  
pp. 21-32
Author(s):  
Sunny Pannu ◽  
Meenakshi Ahirwar ◽  
Rishi Jamdigni ◽  
B. K. Behera
Keyword(s):  
Research Work ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
The Core ◽  
Spun Yarn ◽  
Spun Yarns ◽  
Recovery Percentage ◽  
Shape Retention ◽  
Dual Core ◽  
Made In

The woven fabrics containing cotton/spandex core spun yarns possesses very vital properties of stretch, recovery and thus shape retention from the view point of wearing comfort and garment appearance. Spandex present in the core of core spun yarn is the most essential performer behind these properties. An attempt is made in this research work to study the influence of changing spandex denier in core spun yarn on the stretch and functional properties of stretch woven fabrics. The sole objective of this study is to find out whether different stretch, shrinkage and physical properties of stretch woven fabrics depend upon changing spandex percentage achieved by means of change in spandex filament denier. It was observed that by increasing denier of spandex in core spun weft yarns the increase in weft shrinkage diminishes. Dual core weft with spandex provides good elongation percentage and recovery percentage. The fabric with higher denier spandex in yarn shows a decreasing total hand values trend for summer and winter. The results depicts that the fabrics have higher THV for winter suiting fabrics as compared to summer suiting thus are more suitable for the winter wear.

scholarly journals Changes in physical properties of sweet potato due to effects of thermal pre-treatments for puree production

DYNA ◽  
2018 ◽  
Vol 85 (207) ◽  
pp. 135-142
Author(s):  
Sonia Gallego-Castillo ◽  
Alfredo Adolfo Ayala-Aponte
Keyword(s):  
Physical Properties ◽  
Sweet Potato ◽  
Sweet Potatoes ◽  
Pre Treatment ◽  
Physical Changes ◽  
Orange Fleshed Sweet Potato ◽  
Lower Loss ◽  
Cylindrical Samples ◽  
Intense Color ◽  
Β Carotene

In response to increasing consumer demand for high-quality, easy-to-prepare foods, it is necessary to develop innovative ways to use roots and tubers, such as sweet potatoes, in processed foods. Thus, two thermal processes were evaluated, freezing-cooking (F+C) and blanching-freezing-cooking (B+F+C) on the physical properties of the orange-fleshed sweet potato (OFSP) cultivar, which has a high content of β-carotene, in terms of drip loss (Δm), volume variation (ΔV), color, and texture. Cylindrical samples of OFSP were used. Blanched and unblanched samples were stored by freezing, at -18 °C for 2 months, and subsequently cooked at 95 °C. The blanching process was carried out at 95 °C for 2 min. The results showed that, when blanching was used as a pre-treatment for freezing-cooking, a product with fewer physical changes, with a lighter and more intense color (chroma), and with a lower loss of elasticity (Ed) and firmness (F) was obtained.

Interplay of fabric structure and shear thickening fluid impregnation in moderating the impact response of high-performance woven fabrics

2020 ◽  
Vol 54 (28) ◽  
pp. 4387-4395
Author(s):  
Sanchi Arora ◽  
Abhijit Majumdar ◽  
Bhupendra Singh Butola
Keyword(s):  
Beneficial Effect ◽  
Energy Absorption ◽  
Impact Energy ◽  
High Performance ◽  
Research Work ◽  
Impact Resistance ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Fabric Structure ◽  
The Impact

The beneficial effect of STF impregnation in enhancing the impact resistance of high-performance fabrics has been extensively reported in the literature. However, this research work reports that fabric structure has a decisive role in moderating the effectiveness of STF impregnation in terms of impact energy absorption. Plain woven fabrics having sett varying from 25 × 25 inch−1 to 55 × 55 inch−1 were impregnated with STF at two different padding pressures to obtain different add-ons. The impact energy absorption by STF impregnated loosely woven fabrics was found to be higher than that of their neat counterparts for both levels of add-on, while opposite trend was observed in case of tightly woven fabrics. Further, comparison of tightly woven plain, 2/2 twill, 3/1 twill and 2 × 2 matt fabrics revealed beneficial effect of STF impregnation, except for the plain woven fabric, establishing that there exists a fabric structure-STF impregnation interplay that tunes the impact resistance of woven fabrics.

scholarly journals New indicators on fabric drape evaluation based on three-dimensional model

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1291-1300
Author(s):  
Zhicai Yu ◽  
Yueqi Zhong ◽  
R. Hugh Gong ◽  
Haoyang Xie
Keyword(s):  
Point Cloud ◽  
Three Dimensional ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Angle Distribution ◽  
Bending Rigidity ◽  
Three Dimensional Model ◽  
Fabric Drape ◽  
Fabric Weight ◽  
The Relationship

To evaluate the ability of woven fabrics to drape in a more accurate way, a three-dimensional point cloud of a draped woven fabric was captured via an in-house drape-scanner. A new indicator, total drape angle (TDA), was proposed based on the three-dimensional fabric drape to characterize the ability of a woven fabric to drape. The relationship between TDA and the drape coefficient (DC) was analyzed to validate the performance of TDA. The result indicated that TDA is more stable and representative than the traditional DC in characterizing the ability of a woven fabric to drape. In addition, the drape angle distribution function (DADF) of the triangular mesh was employed to describe fabric drape, as well as to bridge the gap between drape configuration and the warp bending rigidity of woven fabric. The results showed that the correlation coefficient between the real warp bending rigidity value and what was predicted warp based on DADF and fabric weight was 0.952.

scholarly journals Feasibility study of coconut coir dust briquette

2016 ◽  
Vol 12 (2) ◽  
pp. 369-376
Author(s):  
KK Saha ◽  
MM Hossain ◽  
MR Ali ◽  
MM Alam
Keyword(s):  
Physical Properties ◽  
Rice Husk ◽  
Research Work ◽  
Calorific Value ◽  
Economic Feasibility ◽  
Production Costs ◽  
Mixing Ratio ◽  
Water Penetration ◽  
Coir Dust ◽  
Coconut Coir

This research work was conducted on economic feasibility of briquette made of coconut coir dust mixed with rice husk at different ratio. This study sought to assess the physical properties and calorific value of briquette and to establish the demand and willingness of potential users to substitute rice husk briquette and firewood. It was observed that briquette made from mixed coconut coir dust and rice husk at the ratio of 1:2 and 1:1 had desirable properties as compared to rice husk briquette. The percent of shatter indices, density, percent of resistance to water penetration, degree of densification and calorific value of briquette of mixing ratio 1:2 were found 99.75, 1.52gm/cc, 87.5, 11.35 and 4043 kcal/kg and of mixing ratio 1:1 were found 99.82, 1.48gm/cc, 87.5, 10.84 and 3657 kcal/kg, respectively. In case of rice husk briquette, the above values were 99.21, 1.40gm/cc, 75, 10.66 and 3537 kcal/kg, respectively. The production costs of mixing ratio 1:2 and 1: 1 were 3.27 Tk/kg and 3.10 Tk/kg, respectively which were lower than that of rice husk briquette. In partial budget, the substitution propositions among the selected briquettes indicated that coconut coir dust briquette of mixing ratio 1:1 appeared as the most impressive one.J. Bangladesh Agril. Univ. 12(2): 369-376, December 2014

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