UR Etude et Gestion des Environnements Urbains et Côtiers, Ecole Nationale d'Ingénieurs de Sfax, B.P. 1173 - 3038 Sfax, Tunisia.
Bioresour Technol. 2010 Aug;101(15):5749-58. doi: 10.1016/j.biortech.2010.02.069. Epub 2010 Mar 15.
The physico-chemical and microbiological characterizations of olive mill wastewater sludge (OMWS) were investigated in five OMW evaporation ponds of the open-pond system in Sfax (Tunisia), during the olive oil production period in 2004. Time-dependent changes in both physico-chemical parameters and the microbiota were investigated. Mathematical models and principal component analysis (PCA) were used to establish the correlations between the studied parameters. During the effluent time-dependent changes in the ponds, the result of OMWS analysis showed an increase of sludge index (SI), ash content, total solids (TS), volatile solids (VS), ethyl acetate extractive (EAE) and total phosphorus (Total P), as well as microbial flora especially the yeasts and moulds. The SI, TS, VS and Total P changes with time fit a simple linear equation, while EAE, phenols and NH(4)(+) fit a second-degree polynomial model. The PCA analysis exhibited three correlated groups. The first group included temperature, ash content, evaporation, SI, TS, VS, Total P, EAE, yeasts and moulds. The second group was made by bacteria and moisture; and the third group by NH(4)(+), oil and phenol. Such modelling might be of help in the prediction of OMW changes in natural evaporation ponds.
本研究调查了突尼斯斯法克斯（Sfax）地区敞口式橄榄油工厂五个废水蒸发池内橄榄果渣废水污泥（OMWS）的理化特性和微生物特性。研究了在橄榄油生产季节（2004 年）期间 OMWS 的理化参数和微生物群随时间的变化。采用数学模型和主成分分析（PCA）来建立所研究参数之间的相关性。结果表明，在废水蒸发池的排流时间内，OMWS 的分析结果显示污泥指数（SI）、灰分、总固体（TS）、挥发性固体（VS）、乙酸乙酯提取物（EAE）和总磷（Total P）的增加，以及微生物区系（尤其是酵母和霉菌）的增加。SI、TS、VS 和 Total P 的时间变化符合简单线性方程，而 EAE、酚类和 NH(4)(+)则符合二次多项式模型。PCA 分析显示出三个相关的组。第一组包括温度、灰分、蒸发、SI、TS、VS、Total P、EAE、酵母和霉菌。第二组由细菌和水分组成；第三组由 NH(4)(+)、油和酚类组成。这种建模可能有助于预测自然蒸发池内 OMWS 的变化。
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