Biodegradation of beet molasses vinasse by a mixed culture of micro organisms: E

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O#O sL-g"` P+l0Biodegradation of beet molasses vinasse by a mixed culture of micro organisms: Effect of aeration conditions and pH control

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The effect of aeration conditions and pH control on the progress and efficiency of beet molasses vinasse biodegradation was investigated during four batch processes at 38℃ with the mixed microbial culture composed of Bifidobacterium,Lactobacillus,Lactococcus,Streptococcus,Bacillus,Rhodopseudomonas,and Saccharomyces.The four processes were carried out in a shake flask with no pH control,an aerobic bioreactor without mixing with no pH control,and a stirred-tank reactor (STR) with aeration with and without pH control,respectively.All experiments were started with an initial pH 8.0.The highest efficiency of biodegradation was achieved through the processes conducted in the STR,where betaine (an organic pollutant occurring in beet molasses in very large quantities) was completely degraded by the microorganisms.The process with no pH control carried out in the STR produced the highest reduction in the following pollution measures:organic matter expressed as chemical oxygen demand determined by the dichromatic method + theoretical COD of betaine (CODsum,85.5%),total organic carbon (TOC,78.8%) and five-day biological oxygen demand (BOD5,98.6%).The process conditions applied in the shake flask experiments,as well as those used in the aerobic bioreactor without mixing,failed to provide complete betaine assimilation.As a consequence,reduction in CODwum,TOC and BOD5 was approximately half that obtained with STR.

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作者:

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Author:

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*R8@6dOZ Z fK0Krzysztof Lutoslawski

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Edmund Cibis水利论文1d/M2NX#o

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Malgorzata Krzywonos

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Tadeusz Mi(s)kiewicz

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Department of Bioprocess Engineering, Wroclaw University of Economics, Komandorska 118/120, 53-345 Wroclaw, Poland.水利论文] eq(c,}[f"n

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期 刊:水利论文;e$V-m_`JUj'o%c

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Journal:

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Journal of Environmental Sciences

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年,卷(期):水利论文x6frNC

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2011, 23(11)水利论文)B n:`/G!l!YJ

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分类号:

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&Szrv zsFPnj0Keywords:

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#O5V uf:V@:t Ry+j u0aerobic biodegradation

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batch process水利论文4N#~,f$\9Z [

ON YR!h!Wk0beet molasses vinasse水利论文!Y`#B9` R[ma

&a'd/s1p5u/yg[0mesophilic conditions水利论文#R9U O kW

"bG ]+`NtCs(Gr0mixed culture of microorganisms

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水利论文2``:q6r:vKS*Eh a

2012年3月19日

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基金项目:

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Thanks are due to ProBiotics PolskaTM (Poland) for the supply of the SCD ProBio OriginalTM culture free of charge

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[期刊论文] 环境科学学报(英文版)

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v*k%P|aa F G6p^0The effect of aeration conditions and pH control on the progress and efficiency of beet molasses vinasse biodegradation was investigated during four batch processes at 38℃ with the mixed microbial cult...

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