Treatment of Olive Mill Wastewater (OMWW) Using Variable Coagulants with super Flocculants
Jamila Zhran Ibrahim Zhran
جميلة زهران إبراهيم زهران
Olive mill wastewater (OMWW) management has been a major issue of environmental concern for olive oil producing countries. In Palestine, the problem of untreated OMWW discharge is urgent. Several hundred thousand cubic meters of untreated WW is discharged into open areas (wadies) and cesspools whereas the solid waste (olive husk) is dumped into lands nearby the olive mills without treatment. This increases the risk of contaminating soil, surface water resources, and groundwater aquifers. The negative environmental impact of OMWW is attributed to poor biodegradation and toxicity of polyphenols present in OMWW. In this study, sample of OMWW were collected in October 2016 from Al-Qubayba village in the middle part of west bank (north western of Jerusalem), the level of pollution and their impact on the environment has been determined by measuring physical and chemical properties of OMWW such as: COD, pH, EC, TDS, TSS, TPs. The results revealed that the OMWW have a high risk on environment due to the high phenols concentration that exceeds the maximum allowable limits for discharge to environment or to the sanitary sewer system according to Palestinian standards. The treatment of olive mill wastewater (OMWW) by means of coagulation–flocculation coupling various inorganic materials in different dose and organic polyacrylamide (PAM) was investigated. With respect to their efficiency in terms of total phenols removal and the effect of OMWW application on soil water drop penetration time test (WDPT).