Client: Single Buoy Moorings Inc.
Process: Sulphate Removal
Country: Monaco, Switzerland, Brazil
Contract Description: Supply of membrane plant for sulphate removal
Contract Date: April 2007
Contract Completion Date: April 2008
Capacity: 75,000 BPD (11,925m3/day)
Sea Water Conversion: 75%
Sea Water Feed Quality: 36,000 mg/l (tds)
Fresh Water Output Quality: 40 mg/l sulphate
The Project is for the design and supply of a seawater treatment plant sized for 75,000 BPD (11,925 m3/day) of low sulphate water for FPSO Espirito Santo, that will operate in the BC-10 Field, offshore Brasil.
The Project scope consists of a multi-skid arrangement comprising: Guard Cartridge Filtration, HP Feed Pumps, Sulphate Removal Membrane System, Chemical Cleaning System, Chemical Dosing Systems, Control Valves and Instrumentation.A Service Water System is also provided, sized for 5,000 BPD.
Fine filtration is achieved by a set of cartridge filters to provide fine filtration down to 5µm prior to membrane trains. The set of cartridge filters supplies feed water for two (2) trains.
The conditioned water, boosted to the required feed pressure, enters the Sulphate removal trains. Each membrane train is fitted with pressure vessels containing SR90-440i nanofiltration elements.A recovery of 75% is achieved by a 2:1 brine staged configuration. Brine reject from the process is discharged overboard, while the low Sulphate permeate is routed to a vacuum deaerator (provided by others). A dedicated clean in place (CIP) package, consisting of cleaning tank, pump, heater and cartridge filter vessel is provided for membrane cleaning purposes. An SWRO package plant is provided to supply wash water for the main process plant. Chemical Dosing systems for the SRP system and the client supplied deaerator equipment are also provided.