Yong Zhang; Chun-Yu Cao; Qing-Xi Hou; Wen-Ying Feng; Ming Xu; Zhen-Hua Su; Qiao-Yuan Lin; Jin-Feng Zhuang; Wei-Jun Lva
March 2010
BioResources;2010, p780
Academic Journal
Using a multi-effect evaporation system to concentrate the effluent from alkaline peroxide mechanical pulping (APMP) plants is known to require a high energy consumption. In order to improve the situation, a polyethersulfone membrane was used to concentrate the effluent of APMP plants beforehand. An orthogonal experimental design was applied and a mathematical model was established to optimize the filtration parameters. An estimation of potential energy and water savings from this new concentration process was developed. The optimal filtration conditions obtained were: molecular weight cut-off at 10,000 Dalton, trans-membrane pressure at 3 bar, feed temperature at 50°C, cross-flow velocity at 420 rpm, and volume reduction fa1ctor at 0.93. The average permeate flux under these conditions was 45.31 l/m2.h. The total solids content was increased from 14.74 g/l in the feed to 95.04 g/l in the concentrate. The permeate had low total solid contents of 8.75 g/l, Chemical Oxygen Demand of 6696 mg/l, and Biochemical Oxygen Demand of 4383 mg/l. Such qualities would allow the permeate to be reused in the alkaline peroxide mechanical pulping process. With this new concentration process, about 4840.6 kwh energy can be saved and 23.3 m3 effluent discharge can be reduced for each ton of pulp produced.


Related Articles

  • Technology and startup.  // PPI: Pulp & Paper International;Oct2011, Vol. 53 Issue 10, p19 

    The article offers information on the tailor-made Andritz Pre-conditioning Refiner Chemical Alkaline Peroxide Mechanical Pulp (P-RC APMP) process for the production of paper, integrated by Guangxi Jingui Pulp and Paper mill of Asia Pulp and Paper Co. Ltd. (APP).

  • USING A MEMBRANE FILTRATION PROCESS TO CONCENTRATE THE EFFLUENT FROM ALKALINE PEROXIDE MECHANICAL PULPING PLANTS. Yong Zhang; Chun-Yu Cao; Qing-Xi Hou; Wen-Ying Feng; Ming Xu; Zhen-Hua Su; Qiao-Yuan Lin; Jin-Feng Zhuang; Wei-Jun Lv // BioResources;May2010, Vol. 5 Issue 2, p780 

    No abstract available.

  • Pulp Screening Advancements Reduce Shives, Boost Quality. Cannell, Eric // Pulp & Paper;Jul99, Vol. 73 Issue 7, p76 

    Presents an overview of some technologies in the field of mechanical pulping and how they are being applied at mills around the world. Benefits of using wedge wire basket in mechanical pulp millers; Objectives of pulp screening; Details on the changes in pulp quality and energy consumption;...

  • Modeling performance of commercial membranes in the low-pressure filtration coking wastewater treatment based on mathematical filtration models. Mielczarek, Karolina; Bohdziewicz, Jolanta; Włodarczyk-Makuła, Maria; Smol, Marzena // Desalination & Water Treatment;May2014, Vol. 52 Issue 19-21, p3743 

    Based on the results achieved in the coking industry wastewater ultrafiltration treatment and the presumptions of relaxation mathematical model carried out in non-stationary system, and based on the assumptions of the model of hydraulic resistance to filtration, the changes in the volumetric...

  • Processes for the removal of substance from water--an overview based on Norwegian experiences. Odegaard, Hallvard; Eikebrokk, Bjornar; Storhaug, Ragnar // Water Science & Technology;1999, Vol. 40 Issue 9, p37 

    Presents an overview of processes for the removal of humic substances from water based on the experiences gathered in Norway over a period of 25 years. Coagulation/direct filtration; Membrane filtration; Ion exchange; Ozonation/biofiltration.

  • Effects of different potential functions on modeling of RO membrane performance by use of an advanced model. Golnari, A.; Moradi, A.; Soltani, A. // Research on Chemical Intermediates;Jul2013, Vol. 39 Issue 6, p2603 

    Modeling of reverse osmosis membranes is essential for progress in membrane separation technology. Effects of a new potential function on the modified surface force pore flow (MD-SF-PF) model were investigated by Moradi et al. in 2012. The main purpose of this research was to study the effects...

  • Clarifying IMP White Water. GRACE, BOB; REED, BRIAN // Paper 360;Mar/Apr2014, Vol. 9 Issue 2, p41 

    The article focuses on a strategy used by Ponderay Newsprint Co. to treat and remove thermo mechanical pulping (TMP) white water extractives present in the pulp mill. Topics discussed include use of chemical and mechanical methods for water treatment of Krofta's dissolved air floatation...

  • GHARB PAPER HITS SNAG WITH PULP LINE STARTUP.  // PPI: Pulp & Paper International;Apr2004, Vol. 46 Issue 4, p13 

    Reports that Gharb Paper Industries has completed construction of an alkaline peroxide mechanical pulp line at its greenfield mill in Kermanshah, western Iran. Delay with the delivery and installation of electrical cables for the line; Total production a year of woodfree paper.

  • Advances in the use of low-pressure, hollow fiber membranes for the disinfection of water. J.G. Jacangelo; A. Madec; K.J. Schwab; D.E. Huffman; C.S. Mysore // Water Science & Technology: Water Supply;2005, Vol. 5 Issue 5, p109 

    Low-pressure membranes are often used for disinfection purposes. Using a simple bench-scale testing unit, several membranes were evaluated for their capability to remove microorganisms under specific conditions. Five hollow fiber modified polysulfone membranes ranging in molecular weight cutoff...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics