Jarboui Raja, Sellami Fatma, Kharroubi Adel, Gharsallah Néji, Ammar Emna
UR Etude et Gestion des Environnement Urbains et Côtiers, Ecole Nationale d'Ingénieurs de Sfax, B.P. W-3038 Sfax, Tunisia.
Bioresour Technol. 2008 Nov;99(16):7699-708. doi: 10.1016/j.biortech.2008.01.074. Epub 2008 Mar 11.
The aim of this work was to study the natural biodegradation of the stored olive mill wastewater (OMW) in ponds and the infiltration as well as the impact on soil of the effluent in the evaporation pond used for the storage over the past eight years. For this, two approaches were considered. First, a laboratory-scale column was used for the infiltration of OMW through soil (clay and sand) to predict the effect of the clayey soil in reducing OMW pollution. Second, the ponds including the effluent annually stored and having this clayey structure were investigated. At the laboratory-scale, a modification of OMW contents was noticed, with the elimination of 95% of total suspended solids (TSS), 60% of chemical oxygen demand (COD), 40% of total organic carbon (TOC), 50% of total P, 50% of phenols and 40% of minerals (K+, Mg++ and Na+). The experimented soil was able to restrain the considerable effects of OMW pollution. In the ponds, the granulometric characteristics, the physico-chemical and the biological parameters of the soil profile from the contaminated pond were compared to those of a control soil, located near the contaminated pond. Property modifications of the contaminated soil were noted, especially pH, electrical conductivity, COD and microflora. These changes can be explained by the infiltration of OMW constituents, which were noticed in the soil layers, especially phenolic compounds that have a negative effect on the ground water.
这项工作的目的是研究储存于池塘中的橄榄榨油废水（OMW）的自然生物降解情况、其渗滤情况以及过去八年来用于储存的蒸发池中废水对土壤的影响。为此，考虑了两种方法。首先，使用实验室规模的柱体来模拟OMW通过土壤（黏土和沙子）的渗滤过程，以预测黏性土壤在减少OMW污染方面的作用。其次，对那些每年储存有废水且具有这种黏性结构的池塘进行了研究。在实验室规模下，发现OMW的成分发生了变化，其中95%的总悬浮固体（TSS）、60%的化学需氧量（COD）、40%的总有机碳（TOC）、50%的总磷、50%的酚类以及40%的矿物质（K+、Mg++和Na+）被去除。实验所用土壤能够抑制OMW污染的显著影响。在池塘中，将受污染池塘土壤剖面的粒度特征、理化参数和生物学参数与位于受污染池塘附近的对照土壤的相应参数进行了比较。发现受污染土壤的性质发生了改变，尤其是pH值、电导率、COD和微生物群落。这些变化可以通过OMW成分的渗滤来解释，在土壤层中可以观察到这些成分的渗滤，特别是对地下水有负面影响的酚类化合物。
