华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (10): 126-131.doi: 10.3969/j.issn.1000-565X.2018.10.017

• 环境科学与技术 • 上一篇    下一篇

黑液提取率对纸浆残留污染负荷的影响

李友明 韦之敏 陈田田 孙起慧 侯轶   

  1. 华南理工大学 制浆造纸工程国家重点实验室
  • 收稿日期:2017-06-29 修回日期:2017-11-07 出版日期:2018-10-25 发布日期:2018-09-01
  • 通信作者: 侯轶( 1973-) ,女,博士,教授级高级工程师,主要从事工业废水处理和烟草薄片生产过程控制研究 E-mail:ceyhou@scut.edu.cn
  • 作者简介:李友明(1957-), 男,教授,博士生导师,主要从事制浆造纸清洁生产技术、造纸化学品等研究.
  • 基金资助:
    国家重点研发计划项目;
    国家自然科学基金项目;
    广东省科技计划项目;
    佛山市科技计划项目

Effects of Extraction Ratio of Black Liquor on Residual Pollution Load of Pulp

 LI Youming WEI Zhimin CHEN Tiantian SUN Qihui HOU Yi    

  1. State Key Labortory of Pulp and Paper Engineering,South China University of Technology
  • Received:2017-06-29 Revised:2017-11-07 Online:2018-10-25 Published:2018-09-01
  • Contact: 侯轶( 1973-) ,女,博士,教授级高级工程师,主要从事工业废水处理和烟草薄片生产过程控制研究 E-mail:ceyhou@scut.edu.cn
  • About author:李友明(1957-), 男,教授,博士生导师,主要从事制浆造纸清洁生产技术、造纸化学品等研究.
  • Supported by:
      National Key R&D Program China( 2017YFB0307901) , the National Natural Science Foundation of China( 21476091) and the Science and Technology Planning Project of Guangdong Province

摘要: 为定量表征黑液提取率对纸浆中残留污染负荷的影响,以红松传统碱法蒸煮得到的浆料和黑液为研究对象,采用逆流提取工艺,对不同浆料浓度的黑液提取率与浆中残余木质素量,化学需氧量(CODCr)和生化需氧量(BOD5)的关系进行研究。结果表明,木质素降解物是黒液有机物的主要污染来源,高浓高黒液提取率可有效降低污染负荷,浆料浓度从15%提高到35%时,黑液提取率显著增高,从71.34%提高到98.47%,并且浆中残余木质素,CODCr和BOD5的含量都大幅度降低。黑液提取率与浆中残余木质素呈线性关系,与浆中残留CODCr和BOD5分别呈一元三次函数和一元二次函数关系。高浓高黑液提取率是减少制浆和漂白过程中污染负荷的有效方法。

关键词: 纸浆, 黑液提取率, 污染负荷, 逆流提取

Abstract: In order to quantitatively characterize the effects of extraction ratio of black liquor on residual pollution load of pulp, Traditional alkaline cooking was used to cook the pinus koraiensis , and the countercurrent extraction process was used to extract the black liquor.The relationship between the extraction rate of black liquor and the residual lignin content, chemical oxygen demand (CODCr) and biochemical oxygen demand (BOD5) in different pulp concentrations were studied.The results showed that lignin degradation products are the main source of pollution of black liquor organic matter, and high concentration of high black liquor extraction rate can effectively reduce the pollution load.When the extraction rate of high black liquor increased from 71.34% to 98.47%, the content of residual lignin, CODCr and BOD5 in the pulp were significantly reduced.The extraction ratio of black liquor has a linear relationship with remained lignin in pulps, and the remained CODCr and BOD5 in pulps has cubic function of one variable and a uni-variable and hyperbolic relationship respectively.The results showed that high concentration of high extraction was an effective method to reduce the pollution load during pulping and bleaching in papermaking process.

Key words: pulp, extraction ratio of black liquor, pollution load, countercurrent extraction

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