Fillat U.,Polytechnic University of Catalonia |
Roncero M.B.,Polytechnic University of Catalonia |
Bassa A.,CDTC |
Industrial and Engineering Chemistry Research | Year: 2010
To obtain a more realistic appraisal of the potential efficiency of xylanases in the industrial bleaching, the influence of pH and the presence of black liquor (measured as COD) on the bleaching efficiency of two commercial xylanases was studied at high temperature. These pHs, CODs, and temperatures are close to those used in the storage tower of the B fiber line in Jacareí unit of Fibria (Brazil). The pulp samples obtained after each bleaching stage were analyzed for kappa number, brightness, viscosity, and hexenuronic acid content, and so were the effluents for COD, TOC, color, turbidity, and pH after the enzymatic stage. On the basis of the results, the xylanases were found to increase pulp brightness in the treatment involving the most unfavorable conditions (viz. high COD and pH). However, an initial COD above 9 kgO 2 t -1 and/or a pH higher than 9.5 detracted from their bleaching efficiency. The effect on the kappa number and hexenuronic acids content of the pulp was apparent immediately after the enzymatic stage, and the most marked increase in brightness was observed after the chlorine dioxide stage. © 2010 American Chemical Society.
News Article | December 22, 2016
SHANGHAI, Dec. 22, 2016 /PRNewswire/ -- WTiN, in association with UBM China and the TPF 2017 (Shanghai International Digital Printing Industry Fair) – the leading international trade fair for digital textile printing in Shanghai – will organize the WTiN China Digital Textile Conference (CDTC) in Shanghai on April 18, 2017. The conference will focus on latest industry trends, such as the development of Chinese and international print technologies and the development trends of inks and other consumables. It will also provide insights into the new business opportunities provided by digital textile printing technology, and into the advantages the digital printing's supply chain has over traditional analogue methods. The organizer will invite more than 18 experts and leaders from the industry of the textile digital printing as speakers. At that time, 250 elites will gather to witness the development of digital printing industry. China is the world's biggest producer of digitally printed textiles. 2015 saw a strong increase in the installed base of digital printing capacity in China, as well as in the number of domestically manufactured textile machines. By the end of 2015, almost 6,000 dedicated digital textile printers were recorded to be operating in the country, with a capacity to produce over 191 million sqm of digitally printed fabric annually. In addition, there could be as many as 2,000 more adapted roll-to-roll or flatbed machines being used in textile and garment printing applications. All these activities add up to substantial demands for both ink and transfer paper in the Chinese marketplace. According to WTiN, digital textile market is growing at 30 percent in 2016. The conference will attract suppliers of digital printing machineries and ink and leading companies of digital printing consumables and design software. As the most influential conference in digital textile industry, CDTC will be a platform for suppliers and users to discuss the opportunities and challenges of this rapid-growing industry. This is the second time for the cooperation between WTiN and TPF. In 2016, speakers from Reggiani, SPG Print, Kornit, Sensient and Digitex shared their views on the chances and challenges brought by the rapid development of digital printing. Next year, more information and ideas will spread at CTDC 2017. Have your Own Sponsorship Scheme Why you have to sponsor CTDC 2017? Considering the authoritative WTiN digital printing market information, and the international influence of TPF, China Digital Textile Conference will absolutely be an effective platform for exhibitors to increase their brand exposure and develop their brand image, and will provide a better chance for sponsors to acctract target clients and get more trade opportunities. If you would like to learn more information regarding the conference and the program, please click http://2016.cstpf.com/ or contact us: 021-6157 3913, email@example.com.
Fillat U.,University of Barcelona |
Roncero M.B.,University of Barcelona |
Sacon V.M.,CDTC |
Industrial and Engineering Chemistry Research | Year: 2012
The influence of a treatment with two commercial xylanases on pulp and effluents obtained after the bleaching stages in the OXAZDP (O, oxygen stage; X, xylanase treatment; A, acid stage; Z, ozone stage; D, chlorine dioxide stage; P, hydrogen peroxide stage) sequence was studied. Also, the potential saving in chlorine dioxide was assessed. The enzyme treatment was performed on pulp containing some black liquor since the operating conditions were close to the conditions used in the storage tower in Fibria, identified as the most suitable point for application. The greatest differences in kappa number and hexenuronic acid content were observed after the X stage. Whereas, in brightness were observed after the Z stage. The effluent properties from the X stage were higher with the enzyme treatments. Also, the enzymes allowed chlorine dioxide consumption in the bleaching stage to be reduced. The control pulp contained twice as much adsorbable organic halides (AOX) and exhibited twice more brightness reversion than did the enzyme-treated samples. However, the tensile index and drainability at an identical degree of refining were lower in the enzyme-treated samples. © 2012 American Chemical Society.