A unique and single step Dispersed & Dissolved Hydrocarbons removal technology
Macro Porous Polymer Extraction (MPPE) is a highly effective technology for removing dissolved and dispersed hydrocarbons from water by means of liquid-liquid extraction.
The extraction liquid is immobilized in MPP particles applied in a packed bed.
The MPPE system is fully automated, requires minimal operator attention, uses no chemicals and produces no sludges or net off-gasses and is supplied with a guaranteed separation performance for the operational life of the unit.
MPPE Process Description
In the MPPE process, water containing hydrocarbons is passed through a column packed with MPPE particles. The Macro Porous Polymer particles contain a specific extraction liquid.
The immobilized extraction liquid removes the hydrocarbons from the water. Only the hydrocarbons, which have an affinity for the extraction liquid, are removed. The purified water can then either be reused or discharged.
Periodical in-situ regeneration of the extraction liquid is accomplished by heating the media with low-pressure steam. The hydrocarbons contained in the extraction liquid are released as vapor and flow with the steam vapor thru a Condenser. The condensed hydrocarbons are separated from the condensed water in the Separator. The water phase of the Separator is returned to the feed of the MPPE unit
The almost 100% pure hydrocarbons phase is recovered, removed from the system and ready for use/reuse. The aqueous phase (condensed steam) is recycled within the system. The application of two columns allow continuous operation with simultaneous extraction and regeneration. A typical cycle is one hour of extraction and one hour of regeneration
The MPPE technology has the following unique features:
- High guaranteed reduction factor customized design from 90% - 99.99%
- Reduction factor independent of inlet concentration. Thus with a 99% design removal a feed of 100 ppm will be reduced to 1 ppm or when 1000 ppm still a reduction to 10 ppm will be achieved. Most technologies will not allow for 10x higher feed concentration and will have drastically reduced performance.
- The design removal rate can still be maintained with Feed higher than the design concentrations by reducing the flow. For instance a 10% lower flow a 50% higher Feed concentration can be accepted.
- Performance is not affected by constituents like surfactants, corrosion inhibitors, salts, pH range 3-9 etc.
- Turn up/down ratio e.g. 10% to 150% of design capacity.
- Batch wise operation; Immediate performance at start up.
- No waste stream (no use of chemicals), no net off-gas, low noise.
- 100% recovery of water and hydrocarbons (~ 100% pure for (re)use).
- Exchange of MPPE every 2-4 years. Spent MPPE material is cleaned off-site and made ready for reuse.
The MPPE technology has been applied in various industries like:
- Offshore & Onshore gas/condensate/(F)LNG Produced Water
- Hydrocarbon Processing Industry
- Chemical/Specialty chemical
- Electronic Industries
Major application has been the treatment of Gas Produced Water for Onshore LNG Plants, Offshore floating facilities and platforms. Due to the generally high BTEX concentrations, the highly dispersed oil in Gas Produced water and strict discharge requirements MPPE has proven to be an excellent solution for major companies like Shell, Total, Equinor, Woodside, Inpex, Vermilion.
Veolia has extensive experience in supplying units according to the high Oil & Gas specifications.
Groundwater remediation has also proven to be an economic and efficient application as MPPE provides a single step removal of hydrocarbons and/or halogenated hydrocarbons without the requirement of dissolved iron removal that is usually present in groundwater. Also in case of remote sites that require remote and unmanned operation MPPE is an excellent option.
Typical compounds that are removed by MPPE in groundwater remediation are: BTEX, PAH’s, Naphthalene, Dichloromethane, Dichloroethane, Vinylchloride, Trichloromethane, Trichloroethylene, MTBE,.
For Midstream and Downstream Oil & Gas wastewaters containing dispersed oils, aromatics or specific compounds that are (partially) dissolved hydrocarbons MPPE can be attractive option.
For instance Benzene, Vinyl and Styrene removal at Olefins or aromatics plants.
Pre-treatment by MPPE of toxic wastewater before feed to a Biotreater is a common application. MPPE removes the toxic content of the Wastewater leaving the biodegradable fraction to the Biotreater.
For instance a Speciality Chemicals plant has a high COD & BOD Wastewater also containing Trichloromethane, Toluene and Dichloromethane that are toxic to the biology. MPPE removes the toxic compounds (and their COD & BOD) protecting the Biotreater to have a stable operation and best achievable effluent.
Exotic compounds like THT (odor additive in natural gas), CS2, Dioxines, MTBE etc. have been removed by MPPE.
Note that MPPE can also be applied for recovery or concentration of compounds of interest like Limonene.
A Macro Porous Polymer Extraction (MPPE) unit consists of two columns, containing a packed bed of MPPE material. One Column is in extraction mode, the other in regeneration (see figure). The MPPE media contain an immobilized extraction fluid that enables the extraction of hydrocarbons from the Feed water
A cartridge filter protects the media from incidental off-spec solids. The MPPE-column C-01 is in operation and fed in up flow direction (blue line) . Column C-02 is in regeneration (yellow) and is heated up with Low-pressure steam. The temperature of around 102 C in the Bed is maintained for approximately 30 minutes. The extracted hydrocarbons contained in the media are forced out into the steam vapor. The vapor condenses in a water cooled condenser in a water and a hydrocarbon phase. Density differences between the condensed phases allow a final separation of hydrocarbons and water in the Separator.
When the regeneration has completed (normally 1 hour) the operation of the Columns is switched. The hot regenerated Column C-02 is fed with Feed Water which is led to the Column C-01 to be regenerated. This so-called Pass-over enables cooling down of the regenerated Column and pre-heating of the Column to be regenerated. As the Pass-over Water coming from the Column is hot and containing elevated levels of hydrocarbons it cannot be discharged. The pass-over Water is led to the Water Return Tank and gradually fed back with the Feed Water over the next operational phase. The switching of Columns does not interrupt the Feed. The discharge of treated water is interrupted for several minutes during the Pass-over step.
The process is fully automated, flow rate adjusted and requires no Operator intervention. The process has a Turn-down ratio up to 10% of the design flow rate. The process operates at very low noise levels.
The diversity in application and markets also comes with a diversity of research requests and new innovative developments. The R&D program of Veolia MPP Systems is focused on supporting Clients and serving the needs in the market.
Recent developments have extended the application of MPPE in multiple ways:
- Application of new types of media has resulted in ability to remove more polar components, like Isopropyl Alcohol (IPA) and Phenol from water.
- Application research has shown that MPPE can be applied in increasing the concentration of organics in diluted solutions for recovery and reuse.
- Investigations to treat troublesome components like PFOS, Pyrazole, intermediates from pharmaceutical industry.
Removed by MPPE
Important physical properties for determining the efficiency of MPPE:
1. Extractable by organic phase i.e. limited solubility in water. Partition coefficient >20; Kow/LogP >1.3
2. Volatile (to enable regeneration by heating the media).
Two physical properties that give an indication of volatility:
a) Boiling point. Generally below 180 C
b) Vapor pressure. Generally >1 mm Hg
Following compounds have been removed by MPPE
- PAHs (EPA 16): Acenaphtene, Acenaphthylene, Anthracene, Benz(a) anthracene, Benzo (b) fluoranthene, Benzo (k) fluoranthene, Benzo (ghi) perylene, Benzo (a) pyrene, Chrysene, Dibenz(a,h) anthracene, Fluoranthene, Fluorene, Ideno (1,2,3-cd) pyrene, Pyrene, Naphtalene Phenanthrene.
Chloroapthalene, Chlorobenzenes, Chlorobutadiene, Chloroethylene, Dichlorobenzene, Dichloro-di-isopropylether, Dichloroethane (1,1&1,2), Dichloroethylene, Dichloromethane, Dichlorophenol, Dioxins,
Hexachlorobutadiene, Hexachlorocyclohexane, Monochlorobenzene, Monochloromethane, Monochlorophenol, Tetrachloroethane, Tetrachloroethylene, Tetrachloromethane, Trichloroethane, Trichloroethylene, Trichloromethane, Trichlorophenol, Trichloropropane.
- BTEX: Benzene, Toluene, Ethyl benzene, Xylene(s)
- Pentane-Decane-Dodecane etc.
- Gasoline Range Organics (GROs, C7- C10)
- Diesel Range Organics (DROs, C11-C27)
CS2, MIBK, MTBE, Decanol, Nonanol, Octanol, Tetrahydrotiophene (gas odour), Tetramethyltetrahydrofuran, Styrene.
Acetone, IPA, MEK, MTBE, THF, Phenol.
For the options of removal of other compounds please contact us
Ongoing performance guarantee for the whole operational lifetime of the MPPE unit
The delivery of the MPPE unit goes with an ongoing Performance Guarantee with related Services (PGS).
This Performance Guarantee & related Service (PGS) package includes the use and periodical exchange of the MPPE material and separation performance guarantee for the operational life of the MPPE unit with supporting services (e.g. 25-50 years).
Information for Quotation
Proceed within one week
Basic information required:
- Based on some basic information we can give you a price indication
- Basic information required:
- Inlet composition
- Outlet composition
- Flow rate
- Non/availability of steam
- If further information is required laboratory and/or field test can be carried out
Laboratory tests can be carried out with samples from water to be treated.
- Target compounds to be removed
Based on laboratory tests the suitability of MPPE can be concluded as well as sizes and cost estimates for given flow rates and separation performances required.
- Possible effects of other constituents (water environment)
Quite often clients have perceived dangers for non performance due to other constituents in the water. Many tests have been carried out for evaluating these possible effects.
Field Test On Site Offshore and Onshore
Full evaluation of the MPPE technology under real-life circumstances is possible with our mobile MPPE units.
- Plug and play (electricity and inlet water)
- Fully automated
- Remote controlled by internet
- Obtained data representative for scale up
- 24/7 operation (one week can be sufficient)
- Various flows, waterstreams, compositions can be tested.
- Including preparation, start up, training and reporting