Olive Oil Waste Treatment
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Table 5.18 Removal of Wastewater Constituents by Milliscreens and Primary Treatment Percentage removal Milliscreens Constituent
0.5 mm apertures
1.0 mm apertures
Primary treatment
43 15 43 99
23 10 30 96
95 – 100 50 50 – 55 95 – 100
Settleable solids Suspended solids Oil and grease Floatable solids Source: Ref. 82.
between the sewage decolorization and reduction of total organic carbon and phenolic content. It is also advisable to conduct intensive research about sea water’s role in reducing these compounds. In cases where pH is less than or equal to 5, it is necessary to apply neutralization within the pretreatment. The criteria given in Table 5.16 can be referred to for planning and designing the submarine outfalls. Other references provide further details about design criteria and modeling [85]. For economic reasons, it is recommended that several neighboring mills associate in one submarine outfall. The possible impact of effluents on public health and the environment (aesthetic) should be assessed through monitoring stations for effluent discharge and bathing water (Fig. 5.21) to achieve national or international standards (fats, COD, and polyphenols).
Figure 5.21 Monitoring stations location for olive oil mill wastewater discharge through submarine outfalls (from Ref. 48). © 2006 by Taylor & Francis Group, LLC