Environmental Friendly Produced Water Treatment technology

Oil / TSS （TSS : Total suspended solid）

Heavy metals / NORM

TDS (Total Dissolved Solids)

Water Soluble organic matter

・Magnetite ・Coagulant A Coagulant B Magnetic Drum

Magnetite

Oil & SS Flocculation Magnetic-Separation

Produced water

FMS+MRU produced water treatment system JOGMEC – Hitachi, Ltd., Infrastructure Systems Company

FMS (Flocculation and Magnetic-Separation)

Magnet ① Floc

Magnet

② Water

Magnet Free ③ Water

Magnetite Recovery > 70%

Fｌoc Magnetite Recycle

JOGMEC – AIST ( Advanced Industrial Science and Technology ) Self-Assembled Organic Nanotubes（ONTs）

Peptide Lipid

Diameter 10 ~ 300 nm

ONTs adsorb almost chemical components like oil, heavy metals and water soluble organic compounds.

(ppm) Lipid Na+ Cd2+ Pb2+

Produced water 0 7,400 0.6 0.6

After treatment 3,400 7,400 0.02 0.03

Water Circulation

and Re-Use

Ceramic Membrane- based produced water treatment technology

JOGMEC – INPEX Corporation / Chiyoda Corporation / METAWATER Co., Ltd.

Removal of suspended solids and oil from produced water using ceramic membrane

Oil to market

Production well

Production fluid

Oil water separator

Ceramic membrane

filtration unit

Desalination unit (Reverse osmosis

membrane)

River

Gas to market

Water

Oil

Natural gas

Discharge

Oil field Desalination, etc. Oil particle &

SS removal

Pilot-scale demonstration facility

SS: Suspended Solids

Ceramic Membrane (Source: Courtesy of METAWATER)

Diameter 180 mm

Length 1,500 mm

Pilot-scale demonstration flow chart (source : Courtesy of INPEX)

JOGMEC – Water Reuse Promotion Center – KUMAMOTO UNIVERSITY

TOKYO INSTITUTE of TECHNOLOGY

Produced water

Showering

Nano-seconds Pulsed discharge

plasma

Diaphragm reactor

H2O2 Aqua O2

Ozonizer

21 parallel plasma

Test Results TOC Reduction

484 mg/L to 34.4 mg/L (Reaction time 6hrs)

Decomposition rate 92.9%

Decomposition efficiency 0.135 gTOC/kwh

2. The Plasma in babble (Ozone/Hydrogen Peroxide Process)

Tokyo Institute of Technology

1. Nano-seconds Pulsed discharge plasma Kumamoto University

Test Results TOC Reduction

424 mg/L to 31.8 mg/L (Reaction time 5.5hrs)

Decomposition rate 92.5%

Decomposition efficiency 0.21 gTOC/kwh

MRU (Magnetite Recycle Unit)

Oil < 1,000 mg/L

Retention time 5minutes

Oil < 5 mg/L Treated water

Preliminary Test Results

Oil and associated gas

Associated water

Reactor

Reactor

Japan Oil, Gas and Metals National Corporation Technical Solutions Project Group