Olive mill wastewater evaporation management using PCA method Case study of natural degradation in stabilization ponds (Sfax, Tunisia)

被引:45
作者
Jarboui, Raja [1 ]
Sellami, Fatma [1 ]
Azri, Chafai [1 ]
Gharsallah, Neji [2 ]
Ammar, Emna [1 ]
机构
[1] Ecole Natl Ingenieurs Sfax, UR Etude & Gest Environm Urbains & Cotiers, Sfax, Tunisia
[2] Fac Sci Sfax, Lab Biotechnol Microbienne, Sfax, Tunisia
关键词
Biological activity; Open-air ponds; Natural evaporation; Principal component analysis; Olive mill wastewater; POULTRY MANURE; OIL; WASTEWATERS; SLUDGE; SOIL; BIODEGRADATION; PERFORMANCE; RESIDUES; COMPOST; OXYGEN;
D O I
10.1016/j.jhazmat.2009.11.140
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Olive mill wastewater (OMW) evaporation ponds management was investigated in five serial evaporation open-air multiponds of 50ha located in Sfax (Tunisia). Physico-chemical parameters and microbial flora evolution were considered. Empirical models describing the OMW characteristic changes with the operation time were established and Principal Component Analysis (PCA) described the correlation between physico-chemical and biological parameters. COD, BOD, total solids, polyphenols and electrical conductivity exhibited first-order models. Four groups exhibited high correlations. The first included temperature, density, COD, TSS, TS, BOD, VS, TOC, TKN, polyphenols and minerals. The second group was made up of yeasts and moulds. The third group was established with phenolic compounds, total sugars, fats, total phosphorous, NH4+ and pH. The fourth group was constituted by exclusively aerobic bacteria. Bacterial-growth toxic effect was exhibited by high organic load, ash content and polyphenols, whereas moulds and yeasts were more adapted to OMW. During the storage, all the third group parameter values decreased and were inversely related to the others. In the last pond, COD, BOD, TS and TSS rates were reduced by 40%, 50%, 50% and 75% respectively. The evaporation and the biological activity were the main processes acting, predicting the OMW behavior during evaporation in air-open ponds. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:992 / 1005
页数:14
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