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首页> 外文期刊>Environmental engineering and management journal >INFLUENCE OF VARIOUS COMBINATIONS OF HEAT PRETREATMENT ON HYDROGEN FERMENTATION FROM DEOILED JATROPHA WASTE USING MIXED MICROFLORA
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INFLUENCE OF VARIOUS COMBINATIONS OF HEAT PRETREATMENT ON HYDROGEN FERMENTATION FROM DEOILED JATROPHA WASTE USING MIXED MICROFLORA

机译：混合预处理对不同热处理方式联合处理对麻疯树脱水后氢发酵的影响

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摘要

This study emphasis the hydrogen fermentation from de-oiled Jatrophia waste (DJW), a secondary and promising waste from biodiesel industry via influence of various combination of heat pretreatment using sewage sludge as inoculum. Batch experiments were carried out at a DJW concentration of 50 g/L, temperature of 55℃ and an initial cultivation pH of 7. The peak hydrogen production rate and hydrogen yield of 16.3 mmol H_2/L-d and 1.10 mmol H_2/g volatile solids (VS), respectively, were obtained when untreated DJW was fermented with heat-treated seed sludge. The peak methane production rate and methane yield of 6.10 mmol CH_4/L-d and 1.80 mmol CH_4/g VS were observed from the control experiment. In addition, the untreated sludge with heat-treated substrate produced methane revealed that heat-treatment is necessary to inhibit methane producers. Mixed acid type metabolic pathway was observed in all the pretreatment conditions and the soluble metabolic products mainly composed of butyrate and acetate with smaller quantities of other acids and alcohols. The peak energy generation rate and energy yield were calculated as 94 kJ/L-d and 1.8 kJ/g VS added, respectively.
机译：这项研究强调了脱油的麻风树废物（DJW）的氢发酵，这是生物柴油行业的次要和有前途的废物，受污水污泥作为接种物的多种热处理组合的影响。在DJW浓度为50 g / L，温度为55℃，初始培养pH为7的条件下进行分批实验。峰值产氢速率和产氢量分别为16.3 mmol H_2 / Ld和1.10 mmol H_2 / g挥发性固体（当未处理的DJW用热处理的种子污泥发酵时，分别获得VS.从对照实验中观察到最高的甲烷产生速率和甲烷产率为6.10mmol CH_4 / L-d和1.80mmol CH_4 / gVS。另外，未经热处理的污泥与经热处理的底物产生的甲烷表明，必须进行热处理才能抑制甲烷的产生。在所有预处理条件下均观察到混合酸型代谢途径，可溶性代谢产物主要由丁酸酯和乙酸酯以及少量其他酸和醇组成。计算出的峰值能量产生速率和能量产率分别为94 kJ / L-d和1.8 kJ / gVS。

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