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首页> 外文期刊>Process Biochemistry >Inhibition kinetics of overall substrate and phenolics removals during the anaerobic digestion of two-phase olive mill effluents (TPOME) in suspended and immobilized cell reactors
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Inhibition kinetics of overall substrate and phenolics removals during the anaerobic digestion of two-phase olive mill effluents (TPOME) in suspended and immobilized cell reactors

机译：在悬浮式和固定式细胞反应器中两相橄榄磨废水（TPOME）的厌氧消化过程中，总底物和酚类物质去除的抑制动力学

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A study of the mesophilic anaerobic digestion of two-phase olive mill effluents (TPOME) was carried out at laboratory scale. The digestion was conducted in two continuously stirred tank reactors, one with biomass immobilized on bentonite (reactor B) and the other with suspended biomass used as control (reactor C). The reactors operated satisfactorily between hydraulic retention times (HRT) of 25 and 5 days, respectively. Soluble chemical oxygen demand (SCOD) efficiencies in the ranges of 96-80 and 93-82% were achieved in the reactors with immobilized and suspended biomass, respectively, at organic loading rates of between 0.9-4.8 and 0.9-3.8 g COD/l day, respectively. Anaerobic degradation occurred under inhibitory conditions. The overall substrate removal rate (g SCOD/l day) correlated with the biodegradable substrate concentration through the Andrews kinetic model, from which the maximum substrate removal rate (k), saturation constant (K_s) and constant of inhibition (K_i) were calculated. Although no significant differences between the k and K_s values of the reactors with immobilized and suspended biomass were observed, the K_i value was 2.5-times higher in the first case, indicating that the reactor with immobilized biomass had a better response to inhibitory conditions, probably due to the increase of the sludge age. This proposed model predicted the behavior of both reactors very accurately showing deviations lower than 5% between the experimental and theoretical values of substrate removal rates. The same kinetic model allowed the anaerobic degradation of phenolic compounds to be studied, obtaining the corresponding kinetic constants.
机译：在实验室规模下，对两相橄榄磨废水（TPOME）进行了中温厌氧消化的研究。消化是在两个连续搅拌的釜式反应器中进行的，一个反应器固定有膨润土的生物量（反应器B），另一个是将悬浮的生物量用作对照物（反应器C）。这些反应器分别在25天和5天的水力停留时间（HRT）之间令人满意地运行。在固定化和悬浮生物量的反应器中，有机负载量分别为0.9-4.8和0.9-3.8 g COD / l时，可溶化学需氧量（SCOD）效率分别达到96-80和93-82％分别。在抑制条件下发生厌氧降解。通过Andrews动力学模型，总的底物去除速率（g SCOD / l天）与可生物降解的底物浓度相关，由此计算出最大的底物去除速率（k），饱和常数（K_s）和抑制常数（K_i）。尽管没有观察到固定化和悬浮生物量反应器的k和K_s值之间有显着差异，但在第一种情况下，K_i值高2.5倍，表明固定化生物质的反应器对抑制条件有更好的响应，可能由于污泥年龄的增加。该提出的模型非常精确地预测了两个反应器的行为，显示出基板去除率的实验值与理论值之间的偏差小于5％。相同的动力学模型可以研究酚类化合物的厌氧降解，获得相应的动力学常数。

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