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A kinetic study on carboxylic acids production using bovine slaughterhouse wastewater: a promising substrate for resource recovery in biotechnological processes.
Bioprocess and Biosystems Engineering ( IF 3.8 ) Pub Date : 2020-09-11 , DOI: 10.1007/s00449-020-02440-3
Naassom Wagner Sales Morais 1 , Milena Maciel Holanda Coelho 2 , Tasso Jorge Tavares Ferreira 1 , Erlon Lopes Pereira 1 , Renato Carrhá Leitão 3 , André Bezerra Dos Santos 1
Affiliation  

Carboxylic acids (CA) are considered high added-value compounds, and their production from wastes has gained economic and environmental notoriety. However, the CA production and kinetic modeling using some agro-industrial wastewaters, such as bovine slaughterhouse wastewater (SHW), are not well reported in the literature. Therefore, the objective of this work was to evaluate the CA production potential using SHW as a substrate under acidogenic conditions and to apply mathematical models to estimate the kinetic parameters of particulate organic matter hydrolysis, soluble organic matter consumption, and CA production. Tests were carried out in quadruplicate batch reactors with a 250-mL reaction volume, with brewery sludge as inoculum and using chloroform (0.05%, v/v) for methanogenesis inhibition. The obtained yield was 0.55 g acids gCODA−1, corresponding to 0.76 gCOD gCODA−1. The production of caproic acid without the addition of electron donors was achieved. Mathematical models that describe exponential growth, such as the first-order exponential model, cone model, and Fitzhugh model, were the most suitable to describe the production kinetics of CA. Finally, SHW seems to be a promising substrate to be investigated in the carboxylic platform.



中文翻译:

使用牛屠宰场废水生产羧酸的动力学研究:生物技术过程中资源回收的有前途的基质。

羧酸 (CA) 被认为是高附加值化合物,它们从废物中生产已经在经济和环境方面臭名昭著。然而,使用一些农业工业废水(如牛屠宰场废水 (SHW))的 CA 生产和动力学模型在文献中没有得到很好的报道。因此,这项工作的目的是评估在产酸条件下使用 SHW 作为底物的 CA 生产潜力,并应用数学模型来估计颗粒有机物水解、可溶性有机物消耗和 CA 生产的动力学参数。测试在具有 250 mL 反应体积的四份间歇式反应器中进行,以啤酒厂污泥作为接种物,并使用氯仿 (0.05%, v/v) 抑制产甲烷。获得的产量为 0.55 g 酸 gCODA -1,对应于0.76 gCOD gCOD A -1。实现了在不添加电子给体的情况下生产己酸。描述指数增长的数学模型,如一阶指数模型、锥模型和Fitzhugh模型,最适合描述CA的生产动力学。最后,SHW 似乎是在羧基平台中研究的有前途的底物。

更新日期:2020-09-12
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