Research to Deal with the Pulping Black Liquor by Using Aspergillus niger

Lei Yang; Rui Feng Yang; Jie Lu; Yan Jun Liu

doi:10.4028/www.scientific.net/AMR.610-613.2192

Paper Titles

Study on the Performance of Modified UASB Process Treating Sewage
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Theoretical Calculation and Analysis on the Gasification and Melting Process of MSW with Oxygen-Enriched Air
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Effects of Sewage Sludge Compost Application on Abandoned Mine
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Development Countermeasures of the Reverse Logistics Service Chain of Electronic Waste
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Research to Deal with the Pulping Black Liquor by Using Aspergillus niger
p.2192

Experimental Study of Coagulation Treatment of the Arsenic-Containing Rural Drinking Groundwater
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Supercritical Water Oxidation of Lurgi Coal Gasification Wastewater and Evaluation of the Combined Process with Gasification
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Effects of Air Remnant on Temperature and Pressure in Medical Waste Sterilizer
p.2211

Study on the Classification and Recycling Mode of Retired or Scrapped Equipment
p.2216

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Research to Deal with the Pulping Black Liquor by Using Aspergillus niger

Abstract:

We treat black liquor using Aspergillus niger to extract lignin and to improve the utilization value of pulping black liquor. Results show that: The original black liquor directly to the biological treatment by Aspergillus niger, biological bacteria cannot grow, when reaction liquid pH ≤ 9; Inorganic salt concentration ≤7% (mass ratio); The black liquor load ratio is 20% (mass ratio), the condition of Aspergillus niger growth is good, the ability to produce acid is strong. After treatment of Aspergillus niger, liquid pH decreased to 3, Aspergillus niger changes settling performance of lignin, and it’s good for extraction and purification of lignin. Lignin methoxyl content reduced 2.81%, alcoholic hydroxyl content reduced 0.31%, and carboxyl content increased 0.15%.