Feasibility of Recycling the Filtrate from Acidified Black Liquor for Alkaline Pulping of Golden Bamboo Grass

Authors

  • Jin-hui Wang College of Resources, Environment and Materials, Guangxi University, Nanning Guangxi 530004, PR China
  • Tian Zhu College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, PR China; Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, PR China
  • Yi-jing Li College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, PR China; Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, PR China
  • Qian Wang College of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, PR China
  • Yi-kai Ling College of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, PR China
  • Meng-meng Chen College of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, PR China
  • Guang-zai Nong College of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, PR China; College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi 530004, PR China; Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, PR China

Keywords:

Black liquor, Fiber materials, Filtrate, Pulp, Recirculation

Abstract

To reduce energy consumption, a new pulping process called A-D-E-RC (acidification/desalination/electrolysis/recycle-cooking) was developed by a research group in Guangxi University of China. The present work focuses on the step of recycle cooking (RC) to further investigate the technical feasibility of A-D-E-RC methods. Golden bamboo grass was considered as fiber source material for pulp, and it was cooked with the acidic treating of wastewater from black liquor. Then, the pulp obtained from each cooking was made into paper to test the changes in its physical properties.  As a result, the pulp yield increased from 43.9% to 50.2%, after re-using acidified black liquor, and the paper's tear index and tensile index were improved. Therefore, this study demonstrated the feasibility of recycle cooking (RC) fiber materials for pulp applied the acidic treating wastewater from black liquor, and thereby, it further identifies the technical feasibility of A-D-E-RC pulping methods.

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Published

2024-07-19

Issue

Vol. 19 No. 3 (2024)

Section

Research Article or Brief Communication