ANAEROBIC-DIGESTION OF OLIVE MILL WASTE-WATER PRETREATED WITH AZOTOBACTER-CHROOCOCCUM

被引：17

作者：

BORJA, R

MARTIN, A

GOMEZ, LF

RAMOSCORMENZANA, A

机构：

[1] Instituto de la Grasa y sus Derivados, Seville

[2] Departimento de Ingenieria Química, Facultad de Ciencias, Universidad de Córdoba

[3] Departamento de Microbiologia, Facultad de Farmacia, Universidad de Granada

来源：

RESOURCES CONSERVATION AND RECYCLING | 1993年 / 9卷 / 03期

关键词：

D O I：

10.1016/0921-3449(93)90004-Y

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We carried out a kinetic study of the anaerobic digestion of olive mill wastewater that was previously fermented with Azotobacter chroococcum. The process was carried out batchwise in a bioreactor containing sepiolite as support for the mediating bacteria. The anaerobic digestion process was found to follow first-order kinetics and the experimental methane volume (G)-time (t) data to conform to an equation of the form G = G(m)[1 - exp (- K0t) ], from which the apparent rate constant, K0, was calculated. This kinetic constant (average value 1.21 day-1) was found to be scarcely influenced by the substrate concentration over the studied COD range (viz. 4.2 - 8.5 g/1). The specific rate of methane production was substantially higher than that obtained in the anaerobic digestion of untreated olive mill wastewater, and the process seemingly involved no inhibition phenomena as the biotoxicity of the waste was reduced by 30% as a result of the pretreatment. Finally, the average COD fraction removal was 73% and the yield coefficient was 313 ml CH4 STP/g COD.

引用

页码：201 / 211

页数：11

共 23 条

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