REUSING OF PRETREATMENT BATH IN BAHIR DAR TEXTILE SHARE COMPANY

BDU IR Home
→
Ethiopian Institute of Textile and Fashion Technology (EiTEX)
→
Textile Chemistry(MSc)
→
Thesis and Dissertations
→
View Item

dc.date.accessioned	2019-03-28T09:35:37Z
dc.date.available	2019-03-28T09:35:37Z
dc.date.issued	2019-03-28
dc.identifier.uri	http://hdl.handle.net/123456789/9396
dc.description.abstract	Textile industries are doing on to minimize their production costs by using sustainable technologies and by inventing new methods. Pretreatment is the heart of textile production. Bahir Dar Textile Share Company is using combined pretreatment process with exhaust and semi-continuous method. After the treatment is over, the residual chemicals are drained out into effluent treatment plant. The purpose of this project is to reuse the residual chemicals by replenishing the measured amounts of chemicals again for combined pretreatment process. The concentration of main chemicals, after pretreatment, before draining was analyzed. In case of jigger pretreatment process, the liquor is drain out after six ends with chemicals, then the main chemical concentrations (H2O2 and NaOH) was checked at this stage. In case of pad roll bleaching, the fabric rotates in the steaming chamber six up to twelve hours and washed with counter current washing machine. The chemicals are analyzed after washing is over. Based on the chemical analysis results, by replenishing with measured amounts of chemicals, pretreatment is done in both laboratory scales up to four times without changing water and on the bulk production; it has been done by mixing used water and fresh water. The effectiveness of pretreatment was evaluated in terms of absorbency; whiteness and the effect in subsequent dyeing parameters are checked. The dyeing and printing performance is also evaluated by doing dyeing and printing after each pretreatment is over. Acceptable results are found which can fulfill the products of the factory. Finally the amount of cost saved by fabric pretreatment, raw water and waste water treatment chemicals is calculated and also the amount of water which can be saved is shown.	en_US
dc.language.iso	en	en_US
dc.title	REUSING OF PRETREATMENT BATH IN BAHIR DAR TEXTILE SHARE COMPANY	en_US
dc.type	Thesis	en_US