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The Biological Hydrogen Production Potential of Agroindustrial Residues

机译：农用工业废弃物的生物产氢潜力

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摘要

The use of agroindustrial residues for bioe-nergy production can be an attractive alternative from both the environmental and economic perspective. Cassava wastewater (CWW) and cheese whey (CW) are potential substrates for biological hydrogen production (HP) since they are rich in carbohydrates. The biological HP by using a photoheterotrophic bacterial consortium can be advantageous compared to pure culture. In this study, six concentrations of hydrolysed CWW (varying from 5 to 36 g COD L~(-1)) and CW powder (4.7-31.1 g COD L~(-1)) were used for HP by microbial consortium under anaerobic conditions and constant illumination. The experiments were performed in batch reactors under controlled pH (6.5-7.0) in non-sterile conditions. Using CWW, the highest HP was 36.1 mmol H_2 L~(-1) culture in the concentration of 21.3 g COD L~(-1). Using CW, the highest HP was 28.5 mmol H_2 L~(-1) culture in the concentration of 31.1 g COD L~(-1). The hydrogen yields (HY) were higher at lower substrate concentrations: 1.1 mmol H_2 mmol~(-1) glucose for CWW and 2.0 mmol H_2 mmol~(-1) lactose for CW. Carbohydrate removal was high for both substrates (＞90.2 %), but COD removal did not reach such high values (＜42.4 %). Higher CWW concentrations inhibited HP; however, a different trend was observed when increasing the CW concentration. Toxic compounds present in CWW could be responsible for the inhibition of HP.
机译：从环境和经济角度来看，将农用工业残余物用于生物能源生产可能是一种有吸引力的选择。木薯废水（CWW）和干酪乳清（CW）是生物制氢（HP）的潜在基质，因为它们富含碳水化合物。与纯培养相比，使用光异养细菌财团的生物HP可能更有利。在这项研究中，微生物联合体在厌氧条件下使用六种浓度的水解CWW（从5到36 g COD L〜（-1）变化）和CW粉（4.7-31.1 g COD L〜（-1））用于HP。和持续的照明。实验是在非灭菌条件下在受控pH（6.5-7.0）的间歇反应器中进行的。使用CWW，在21.3 g COD L〜（-1）浓度下，最高HP为36.1 mmol H_2 L〜（-1）培养物。使用连续波，在31.1 g COD L〜（-1）浓度下，最高HP为28.5 mmol H_2 L〜（-1）培养物。在较低的底物浓度下，氢气产率（HY）较高：CWW为1.1 mmol H_2 mmol〜（-1）葡萄糖，CW为2.0 mmol H_2 mmol〜（-1）乳糖。两种底物的碳水化合物去除率都很高（＞ 90.2％），但COD去除率却没有达到如此高的值（＜42.4％）。较高的CWW浓度会抑制HP。然而，当增加连续波浓度时观察到不同的趋势。 CWW中存在的有毒化合物可能是抑制HP的原因。

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  • 来源
    《Waste and biomass valorization》 |2015年第3期|273-280|共8页
  • 作者

    Carolina Zampol Lazaro; Morgana Bosio; Janaina dos Santos Ferreira; Maria Bernadete Amancio Varesche; Edson Luiz Silva;

  • 作者单位

    Department of Chemical Engineering, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, SP 13565-905, Brazil;

    Department of Chemical Engineering, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, SP 13565-905, Brazil;

    Department of Chemical Engineering, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, SP 13565-905, Brazil;

    Department of Hydraulics and Sanitation, School of Engineering of Sao Carlos, University of Sao Paulo, Av. Trabalhador Sao-carlense, 400, Sao Carlos, SP 13566-590, Brazil;

    Department of Chemical Engineering, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, SP 13565-905, Brazil;

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  • 正文语种 eng
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  • 关键词

    Bioenergy; Cassava wastewater; Cheese whey; Microbial consortium; COD removal;

    机译：生物能源木薯废水;奶酪乳清;微生物联盟;去除COD;

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