Biohydrogen production by co-digestion of fruits and vegetable waste and coffee mucilage

Q3 Agricultural and Biological Sciences

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2019-09-01 DOI:10.15446/rfnam.v72n3.73140

Edilson León Moreno Cárdenas, A. D. Zapata Zapata

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引用次数: 7

Abstract

In the present investigation, the effects of the substrate composition, organic load, medium acidification time, operation pH, and temperature on the production of hydrogen by anaerobic fermentation with fruits and vegetable waste, and fresh mucilage of coffee was evaluated. For this purpose, tests were carried out in a 20-liter bioreactor operated in batch mode, under a central composite experimental design (CCD). The fermentations were conducted under mesophilic conditions, without adding inoculum, and without sterilizing the substrate. The results for maximum daily hydrogen production (MDP), the maximum hydrogen content in the gas (MHC) and cumulative production (CHP) showed an acceptable fit to second-order polynomial models. All the independent variables were significant, especially the operation pH and the acidification time. Also, the premises for a model obtained by regression, according to error analysis, were fulfilled. In the same way, it was possible to optimize the response variables. The maximum specific production concerning the organic load was 5511 mL H2 gCODremoved-1, and regarding the volatile solids was of 670 mL H2 gVSadded-1. These values are higher than those reported with similar substrates in continuous fermentation, with cell retention, use of inoculum, and substrate pretreatment.

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通过共同消化水果和蔬菜废物和咖啡粘液生产生物氢

本研究考察了底物组成、有机负荷、培养基酸化时间、操作pH和温度对果蔬废弃物厌氧发酵产氢和咖啡新鲜粘液的影响。为此目的，在中央复合实验设计(CCD)下，在一个20升生物反应器中以批处理模式进行了测试。发酵在中温条件下进行，没有添加接种物，也没有对底物进行灭菌。最大日产氢量(MDP)、气体中最大氢含量(MHC)和累积产氢量(CHP)的拟合结果符合二阶多项式模型。各自变量均显著，尤其是操作pH和酸化时间。通过误差分析，得到了回归模型成立的前提条件。同样，优化响应变量也是可能的。有机负载的最大比产率为5511 mL H2 gcodeleted -1，挥发性固体的最大比产率为670 mL H2 gv萨德-1。这些数值高于类似底物连续发酵、细胞保留、使用接种物和底物预处理的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Facultad Nacional de Agronomia Medellin Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： La Revista Facultad Nacional de Agronomía Medellín (RFNA), de la Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias Agrarias, es una publicación científica editada desde el año 1939, en formato impreso y digital y de acceso abierto desde la web —sin costo para autores y lectores—. Está orientada a investigadores que crean conocimiento disciplinar y multidisciplinar que articula la ciencia y la tecnología para hacer más productivo el campo a nivel empresarial y de economía campesina. La Revista tiene como objetivo divulgar resultados de investigación mediante artículos originales, inéditos y arbitrados (peer review) de carácter científico que respondan a preguntas específicas y que proporcionen sustento y pruebas a una hipótesis, en aspectos relacionados con las Ciencias Agronómicas, Producción animal, Ciencias Forestales, Ingeniería Agrícola, de Alimentos y otras afines que contribuyan a la solución de los limitantes del agro a nivel nacional, regional e internacional. La Revista recibe y publica, sin ningún costo, artículos en idioma inglés de investigación, revisión, reseñas y cartas al editor. Desde el 2017 la periodicidad de publicación es cuatrimestral, se publican tres números al año con circulación nacional e internacional, en los siguientes períodos: Enero - Abril Mayo - Agosto Septiembre - Diciembre This journal does not charge APCs or submission charges.