Project Results

News about the OilEClear project's results will continuously be published on this site.

The OilEClear Pilot Plant

A new Renaren unit has been manufactured by Westmatic tailored to the OilEClear technology.

pilot plant

Parallel with this, manufacturing of the developed and designed components of the pilot plant to be tested on board the Stena Saga vessel has been progressing. These include the process control unit based on the Schneider PLS and HMI system for control of key process parameters, the enclosure system for eliminating potentially explosive and/or toxic gases, and the separation unit for removing generated floc beds. All components are now integrated with the new Renaren at Westmatic in Sweden where the functionality test is being run.


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OilEClear presented at Offshore Technology Days (OTD) 2014

OTD is Norway’s largest annual oil and gas exhibition visited by more than 30000 persons from 30-40 nations.


The 2014 exhibition arranged at Straume near Bergen on Octber 15-16  has attracted an audience of engineers, technical specialists, industry leaders and experts.

OilEClear was presented jointly by Westmatic, Nacom and TI during the event at own stand with life demonstration of the technology. The stand did draw the attention of many visitors including major actors in the offshore industry such as Statoil and Kværner. During the demonstration, continuous information was provided about the cleanliness of the treated water with the help of an online ppm measuring device with own monitor.


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Brochure about OilEClear project

The OilEClear brochure you can find here.


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Progress and results

To establish the final design requirements,  further investigations have been performed on floc characterization under different scenarios to understand , assess and minimize generation of potentially harmful or explosive gases. These are to be used as a basis for design of the protective measure as a form of gas enclosure as well as sensor guards. There has been full focus on the safety aspects of the cleaning system and the design of the gas enclosure is finalized after evaluating 4 alternative concepts. The prototype of the enclosure is being manufactured for integration with the Renaren before installation on board the Stena Line vessel.

The objective of an efficient OileClear system is to separate and remove emulsions swiftly from the waste water. In this regard both  accumulation and breakage of floc and further reagglomeration has been assessed. Based on this assessment different supplementary processes that will enhance the performance of the system  in order to meet requirements of existing and upcoming regulations  have been considered.

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After evaluating different scenarios using electrocoagulation to remove oil droplets from the contaminated water, the next phase of investigation has been focusing on  loaded floc separation. Loaded flocs contain not only oil but also solids in suspension, electrolysis gases and metal ions. Since the concentration of all these components in flocs is difficult to determine,  the behaviour of single flocs alone is no longer of interest. Therefore further investigation has focused on  the behaviour of the floc bed.  For separation of the floc bed different methods have been evaluated in relation to efficiency and cost effectiveness, including foot print. The design derived from the experiments has been simulated using different boundary conditions. The most promising designs  have  been integrated with the electrocoagulation unit and subjected to extensive trial. During the tests valuable inputs that were  received from the SMEs have been applied.  The latest test results have shown consistent  oil content  of 1 – 5 ppm in the cleaned water down from concentration of  several hundred ppm in the feed wastewater.  This is a significant breakthrough in the OileClear technology.

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Preliminary project progress- March 2014

With close cooperation with the SMEs, the RTDs in the project have accomplished in depth literature study and preliminary laboratory investigations that provides  enhanced understanding on the characteristics of bilge and slope water and SOA treatment methods, especially  application of electrolysis for separation of oil from bilge and/or slope water as a basis for the technical work in the development of the OileClear technology. Further to this, the scientific basis that has been established includes new knowledge on relevant parameters that impact on the electrochemical process, global design criteria and analytical methods for estimation of hydrocarbon index in the water to be treated by OileClear as well as potential generation of explosive and toxic gases under electrolysis of bilge water.

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Technical progress and achievements

The research work on electrocoagulation at Fraunhofer and experience obtained from the Renaren unit being tested on board one of the Stena Line vessels has given valuable knowledge on the performance of the core OileClear process. The investigations undertaken have shown that oil droplets floating in a water matrix can be destabilised using an electrical field, but primarily due to hydroxide flocs from an electrocoagulation process. 

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Description of work performed and main results - October 2013

The project has now completed the first nine months out of a total of 24 months. The focus has been on completing WP1 on establishing scientific knowledge of EC processes and its affect on removal of THC as well as establishing the design criteria for the system. Fraunhofer has run tests with Renaren, upon which the OilEClear technology will be based on, to establish the effect on removal of THC. The results were promising and will be used as a benchmark for the development of the floatation and separation chamber in WP3. Fraunhofer has also run tests to establish the level of hydrogen gas released from the process, which was well below LELs. TI has investigated relevant regulations, standards, type approvals as well as end user requirements and requirements in form of environmental factors relevant for the design, needed handling of sludge collected from the process, control system requirements, flow requirements and material requirement for ships, which will be a foundation for the work in WP2-4. In addition, TI has investigated the ATEX directive and NORSOK standards for rigs and platforms which are important input as requirements for the design and development for these markets. Based on these findings, TI has made for design options for rigs and platforms, taking into consideration the various EX zones.  Further work will include selection of best design of enclosure for the two markets, rigs and platforms.

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Technical Meeting at Westmatic – January 2013

The RTDs and Stena met at Westmatic in Arvika, Sweden for a demonstration of the existing Renaren which will lay the foundation for the work in the project. Benchmarking tests of Renaren are planned for March


2013 at IGB and work on defining product specifications is now on-going.

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Project Kick Off – November 27th -28th 2012

OilEClear has an official start date of November 15th, 2012. The Kick-off meeting for the project was held at TI in Oslo, Norway on November 27th and 28th. Both industrial partners and RTD partners took part of the meeting.


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