Flocculation Process of PEO for Lignin Removal from Pre-Hydrolysis Liquor of Mixed Hardwood

Abstract:

To isolate lignin of PHL, PEO with various molecular weights (MW) s were added to PHL under different process conditions, and the turbidity and size of complexes formed in the PHL, as well as the lignin, hemicelluloses (sugar) and chemical oxygen demand (COD) of PHL were assessed after PEO treatments. Alternatively, poly aluminum chloride (PAC) (200 mg/l) and PEO (8 MDa MW) (200 mg/l) were employed in a dual polymer system to extract the lignin of PHL. In this work, the maximum removals of 46% lignin, 18.8% sugars, and 32% COD were obtained under the conditions of 400 mg/g PEO (with a MW of 8 MDa) at pH 2 and room temperature in a singular PEO polymer system.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1859-1862
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1859
• Online since: August 2013
• Authors: Gang Liu, Hai Qiang Shi*, Qing Wei Ping, Jian Zhang, Na Li, Mei Hong Niu
• Keywords: COD, Flocculation, Hemicelluloses, Lignin, Poly Ethylene Oxide, Pre-Hydrolysis Liquor

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