Project Acronym: TOMWPA 

Project Summary


The manufacturing process of olive oil yields a black liquid waste called ‘olive mill wastewater’ (OMWW) causing a major environmental problem in Palestine. While OMWW contains plant nutrients such as organic matters and micronutrients including N, P, K, Ca, Mg, and Fe, it can also result in the accumulation of salts and phytotoxic compounds in soil and can potentially contaminate surface and groundwater resources. Once it is properly treated, the OMWW can be a valuable source for irrigation. In the initial phase of the research, proper chemical and biological analyses were carried out. Besides, model calculations were made regarding the dynamic water balance, and scenario calculations were made on the use of treated wastewater in greenhouse horticulture. In a second phase, the treated water was used at pilot plant scale (10-20 Liters) as well as small-scale field experiments.

Research Objectives


Several methods were investigated for OMWW treatment such as wet flocculation/coagulation, centrifugation, and separation of liquid/solid phase but most of the published research dealt with anaerobic treatment. The major aim of this work was to find feasible methods for the safe management of OMWW at a pilot plant scale. The specific objectives were: 

- Removing toxic compounds in OMWW using an integrated system by applying physical, chemical, and biological methods

- Providing suitable future handling procedures for olive mill owners 

- Recovering waters from OMWW in greenhouse agriculture 

- Recovering useful fertilizers (fertigation water) from OMWW 

- Feasibility study of the proposed process

Project Team


Name                                        : Mazen Salman  

University                                 : Palestine Technical University- Kadoorie 

Email                                        : salman_mazen@daad-alumni.de 

      Name                                       : Mahmoud Rahil 

Organization                             : Palestine Technical University- Kadoorie 

Email                                        : mrahail@yahoo.com 

Name                                       : Nabil Shahin 

Organization                            : Palestine Technical University- Kadoorie 

Email                                       : nabilshahin@hotmail.de 

Name                                      : Hikmat Hilal 

Organization                           : An Najah National University 

Email                                      : hshilal@najah.edu 

Name                                     : Ahed Zyoud 

Organization                          : An Najah National University 

Email                                     : ahedzyoud@najah.edu 

Name                                     : Wim Voogt 

Organization                          : Wageningen University (WU) 

Email                                      : wim.voogt@wur.nl

Name                                    : Ruba Abuamsha 

Organization                         : National Agriculture Research Center (NARC) 

Email                                    : ruba_salman@yahoo.com 

Research Deliverables and Outcomes: 

Tags: 

Research Category: 

Small Research Project (SRP)

Research Summary : 

The manufacturing process of olive oil yields a black liquid waste called ‘olive mill wastewater’ (OMWW) causing a major environmental problem in Palestine. While OMWW contains plant nutrients such as organic matters and micronutrients, it can also lead to/result in the accumulation of salts and phytotoxic compounds in soil and can potentially contaminate surface and groundwater resources. Once it is properly treated, the water will be a valuable source for irrigation. In the initial phase of the research, proper chemical and biological analyses were carried out.