This article has been cited by other articles in PMC. Abstract Currently, biological method has been utilized in the treatment of wastewater -containing synthetic dyes used by textile industries in Iraq. The present work was devoted to study the operating feasibility using reverse osmosis RO and nanofiltration NF membrane systems as an alternative treatment method of wastewater discharged from Iraqi textile mills.
Tasks of the Rotor Spinning Machine: Homogenizing through back doubling. Ordering the fibers in the strand must have an orientation as far as possible in the longitudinal direction.
Improving evenness through back-doubling. Principle of Rotor Spinning: The general principle of rotor spinning is shown in Figure. The input fiber strand is a drawn sliver.
A sliver may have more than 20, fibers in its cross-section. This means that a yarn of fibers per cross-section will require a total draft of This amount of draft is substantially higher than that of ring spinning.
Drafting in Thesis dye removal spinning is accomplished using a comber roll mechanical draft which opens the input sliver followed by an air stream air draft. These two operations produce an amount of draft that is high enough to reduce the 20, fibers entering the comber roll down to few fibers fibers.
In order to produce a yarn of about fibers per cross-section, the groups of few fibers emerging from the air duct are deposited on the internal wall of the rotor and a fiber ring is formed inside the rotor.
The total draft in rotor spinning is, therefore a combination of true draft from the feed roll to the rotor in the order of thousands and a condensation to accumulate the fiber groups into a fiber ring inside the rotor. The total draft ratio is the ratio between the delivery or the take-up speed and the feed roll speed.
This should approximately amount to the ratio between the number of fibers in the sliver cross-section and the number of fibers in the yarn cross-section. Rotor Spinning process Consolidation in rotor spinning is achieved by mechanical twisting.
The torque generating the twist in the yarn is applied by the rotation of the rotor with respect to the point of the yarn contacting the rotor navel. The winding operation in rotor spinning is completely separate from the drafting and the twisting operations.
The only condition here is that the yarn is taken up at a constant rate. This separation between winding and twisting allows the formation of larger yarn packages than those in ring spinning.
The feed stock in form of either card sliver or draw frame sliver from first or second passage drawing. The sliver runs from a can beneath the spinning unit into the feed trumpet. A spring ensures firm clamping of the sliver by urging the trough towards feed roller. In the event of an end-break, the feed unit is stopped either by stopping the feed roller rotation or by pivoting the in feed trumpet, in each case sliver feed stops automatically.
The signal pulse causing this effect is generated by a yarn-sensing arm. In rotor spinning, the fiber strand is opened to individual fibers. This task is performed mainly by the opening roller. An air flow is needed for further transport of the fibers to the rotor.
This is generated by central fan that draws air by suction through leads from each rotor box.Engineering And Analytical Science. Thesis of Ph. D. Azlinda Abdul Ghani, Ragunathan Santiagoo, Anbu Clemensis Johnson, Naimah Ibrahim and Salsuwanda Selamat ().
Dye Removal from Aqueous Solution using Egg Shell Powder. School of Environmental Engineering, Universiti Malaysia Perlis. One of the most effective methods for removal of organic dye pollutant is by adsorption [5; 6].
The capacity depends on the physical nature of adsorbent, the nature of . Description. Sumacs are shrubs and small trees that can reach a height of 1–10 m (– ft).
The leaves are spirally arranged; they are usually pinnately compound, though some species have trifoliate or simple timberdesignmag.com flowers are in dense panicles or spikes 5–30 cm (– in) long, each flower very small, greenish, creamy white or red, with five petals.
The objective of this work is the study of adsorption of dye solution which is a mixture of three dyes (methylene blue, congo red & malachite green) using commercial activated carbon.
Removal of these dyes from aqueous solution using commercial activated carbon has been. SYNTHESIS AND CHARACTERIZATION OF CdSe-ZnS CORE-SHELL QUANTUM DOTS FOR INCREASED QUANTUM YIELD A Thesis Presented to The Faculty of .
1 REMOVAL OF BLUE DYE FROM WASTEWATER BY ADSORPTION ONTO ACTIVATED CARBON Prof.
Dr. Abass H. Sulaymon Asst. Prof. Dr. Mohammad A. Moslem Al-Tufaily.