Contribution of Extractives to Methanogenic Toxicity of Hemp Black Liquor

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概要

• 論文の詳細を見る

• The objective of this research was to identify the major sources of methanogenic toxycity in hemp black liquors. Hemp extractives were shown to be highly toxic. The stem wood extractives, which had a 50% inhibitory concentration (IC) corresponding to 0.25 g COD/l, were somewhat more toxic than bark extractives with a 50% IC crresponding to 0.65 g COD/l. The methanogenic toxicity of black liquors from hemp was comparable with the toxicity of black liquors from woody feedstocks and ranged between 2.8 and 4.8 g COD/l.Removal of extractives from the hemp fiber prior to pulping only partly reduced methanogenic toxicity, in spite of high extractive removal efficiencies. The residual extractives remaining in the feedstocks after firger extracton (10 to 30% of the extractives according Soxhlet determinaton) were apparently released into the black liquor during pulping. To improve removal of the extractives, hemp black liquor was subjected to several detoxification treatments. Ethyl ether extraction and Amberlite XAD-2 treatment achieved complete wastewater detoxification. These results indicate that the apolar extractive fraction is the major source of methanogenic toxicity in hemp black liquors.

• 公益社団法人日本生物工学会の論文
• 1995-10-25

著者

• FIELD JIM

  Department of Environmental Technology, Wageningen Agricultural University

• Field Jim

  Department Of Environmental Technology Wageningen Agricultural University

• KOETEKAAS SJON

  Department of Environmental Technology, Wageningen Agricultural University

• SOTO MANUEL

  Department of Industrial and fundamental Chemistry, Univeristy of A Coruna

• VICENT TERESA

  Department of Chemical Engineering, Autonomous University of Barcelona

• LETTINGA GATZE

  Deaprtment of Environmental Technology, Wageningen Agricultural Univeristy

• Soto Manuel

  Department Of Industrial And Fundamental Chemistry Univeristy Of A Coruna

• Vicent Teresa

  Department Of Chemical Engineering Autonomous University Of Barcelona

• Koetekaas Sjon

  Department Of Environmental Technology Wageningen Agricultural University

• Lettinga Gatze

  Deaprtment Of Environmental Technology Wageningen Agricultural Univeristy

関連論文

• Anaerobic-Aerobic Treatment of Toxic Pulping Black Liquor with Upfront Effluent Recirculation
• Effect of Cobalt on the Anaerobic Degradation of Methanol
• Treatment of Low Strength Soluble Wastewaters in UASB Reactors
• Contribution of Extractives to Methanogenic Toxicity of Hemp Black Liquor

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