Experimental study on filtering papermaking black liquor by dynamic blade crossflow membrane
-
Wenjie Zhao
and
Fushan Chen
Abstract
The fundamental reason for the environmental pollution caused by the papermaking industry is the inadequate treatment of the black liquor. How to dispose of the lignin macromolecules, which is the main pollutants in the black liquor, is the key to addressing the environmental pollution. At present, cross-flow membrane filtration is one of the effective ways to retain and recycle lignin macromolecules in black liquor. The paper proposes the adoption of a dynamic blade cross-flow membrane filtration equipment provided by German BOKELA company to treat papermaking black liquor. The experiment shows that when the black liquor is treated with dynamic blade rotation cross-flow, the membrane with a molecular weight cut-off of nanofiltration (NP010) delivers the best retaining effect, with 28 % more lignin in black liquor than that in untreated black liquor. Meanwhile, when the blade rotational speed reaches 300 rpm and the transmembrane pressure is 0.5 or 2 bar, the flux of black liquor through nanofiltration NP010 is relatively desirable.
Funding statement: Also extend thanks to the Fund Project (2019GHY112040) for their support on finance.
Acknowledgments
The authors give sincere gratitude to Professor Wu Junfei and Professor Chen Fushan from Qingdao University of Science and Technology, Professor Hermann Nirschl and a fellow colleague Zihim Lam from the Karlsruhe Institute of Technology (KIT) for their academic assistance and help.
Conflict of interest: The authors declare no conflicts of interest.
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- Elastic-plastic model for the mechanical properties of paperboard as a function of moisture
- Evaluating the use of a tactile sensor for measuring carton compliance
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- Determination of hydrophobic degree of paper packaging materials by a tracer-assisted headspace gas chromatography
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- Coating factors influencing the fold cracking of coated papers
- The effect of zeolite on inkjet coated paper surface properties and deinking
- Printing
- Exploitation influence on compressible polyurethane flexographic sleeve properties
- Environmental impact
- Effects of pH shock on microaerobic activated sludge system with a graphene oxide/nano-magnetic powder composite
- Experimental study on filtering papermaking black liquor by dynamic blade crossflow membrane
- Partial circuit closure of filtrate in an ECF bleaching plant
- Nanotechnology
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Articles in the same Issue
- Frontmatter
- Chemical pulping
- Feasibility of removal S−2 from Kraft black liquor recovery cycle with synthetic adsorbents (Cu-PAC and Cu-GAC)
- Effect of bark content in mixed hardwood chips on pulp and papermaking properties
- Process modifications to obtain a prehydrolysis kraft dissolving pulp with low limiting pulp viscosity
- Bleaching
- Synthesis of chlorine dioxide stable solution by combined reduction and its decomposition kinetics
- Paper physics
- Elastic-plastic model for the mechanical properties of paperboard as a function of moisture
- Evaluating the use of a tactile sensor for measuring carton compliance
- Paper chemistry
- Determination of hydrophobic degree of paper packaging materials by a tracer-assisted headspace gas chromatography
- Jet-cooked papermaking starches studied using 1H NMR-relaxometry and viscometry
- Enhanced separation of cellulose from bamboo with a combined process of steam explosion pretreatment and alkaline-oxidative cooking
- Improving mechanical properties of recycled paper via surface spraying carboxymethyl starch-grafted-polyacrylamide
- Coating
- The influence of coating composition on the structural and functional properties of coated paper for packaging applications
- Coating factors influencing the fold cracking of coated papers
- The effect of zeolite on inkjet coated paper surface properties and deinking
- Printing
- Exploitation influence on compressible polyurethane flexographic sleeve properties
- Environmental impact
- Effects of pH shock on microaerobic activated sludge system with a graphene oxide/nano-magnetic powder composite
- Experimental study on filtering papermaking black liquor by dynamic blade crossflow membrane
- Partial circuit closure of filtrate in an ECF bleaching plant
- Nanotechnology
- Paperboard as a substrate for biocompatible slippery liquid-infused porous surfaces
