PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 2, Number 2, 2016
Papermaking wastewater treatment by hydrolytic-aerobic biological contact oxidation process — analysis of an example, Biao HAN, Chun-li JIANG, Wei ZHAO, Wei-wei ZHANG, Jun-he HE, Materials Engineering and Environmental Science : Chapter 7. Technology for Environmental Protection, pp.668-672. Hydrolytic-aerobic biological contact oxidation process was used to treat the wastewater from pulp washing and bleaching section. The method to resolve this problem is to build in some perforation pipes on the basin bed, which can let a little of aerobic sludge reflow back into the hydrolytic-acidification basin in a fixed period. The aerobic sludge can stir anaerobic sludge, so the sludge contacts to the wastewater sufficiently, and the hydrolytic- acidification becomes more effective. The results show that the removal rates of CODCr, BOD5 was 85% or above. WOOD PANEL Effects of the Addition of Citric Acid on Tannin-Sucrose Adhesive and Physical Properties of the Particleboard, Zhongyuan Zhao, Kenji Umemura, Kozo Kanayama, Bioresources , Vol.11, No.1. The effects of citric acid on the curing properties of tannin- sucrose adhesives and on the physical properties of particleboard utilising the adhesives were investigated. The addition of citric acid promoted the reaction between tannin and sucrose at a lower temperature, and the optimal hot pressing temperature decreased from 220 to 200°C. The mechanical properties and water resistance of the particleboards were also enhanced. Bonding Ability of a New Adhesive Composed of Citric Acid-Sucrose for Particleboard, Ragil Widyorini, Pradana Ardhi Nugraha, Muhammad Zakky Arief Rahman, Tibertius Agus Prayitno, Bioresources , Vol.11, No.2. Citric acid is a potential binding agent for composite products that has three carboxyl groups that can be ester linked with the hydroxyl groups found in wood. The addition of sucrose provides hydroxyl groups and increases the amount of ester groups. This research investigated the bonding ability of a new adhesive composed of citric acid-sucrose for teak particleboard. Oriented Strand Board: Opportunities and Potential Products in China, Juwan Jin, Siguo Chen, Robert Wellwood, BioResources , Vol.11, No.4. North America's first oriented strand board (OSB) mill was built in the early 1980s. Twenty years later, the industry was thriving, with over 50 mills producing the product. China's first OSB mill was built in 1990, and 25 years later, there are a few mills with a total capacity less than two large North America mills, most operating below capacity and struggling to identify domestic markets for the growing production. This paper briefly looks at the histories of OSB industries in North America and China, presents the current situation of China’s wood-based panels industry and its downstream industries, and identifies OSB opportunities and potential products in China. Effect of addition of microfibrillated cellulose to urea-formaldehyde on selected adhesive characteristics and distribution in particle board, Eike Mahrdt, Stefan Pinkl, Clemens Schmidberger, Hendrikus W. G. van Herwijnen, Stefan Veigel, Wolfgang Gindl-Altmutter, Eike Mahrdt, Cellulose , Vol.23, No.1. Several studies demonstrate that the addition of microfibrillated cellulose (MFC) to urea-formaldehyde (UF) wood adhesive improves the mechanical bond strength of wood particle board. In order to elucidate potential underlying mechanisms, the distribution of unmodified UF as well as MFC-modified UF (UF-MFC) in particle board was studied by means of light microscopy.
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