downstream, spent caustic and wastewater treatment · © siemens ag 20xx all rights reserved....

© Siemens AG 20XX All rights reserved.

Downstream, Spent Causticand Wastewater Treatment


• Wet Air Oxidation

Siemens Water Solutions for the DownstreamIndustry

• API separators – primary oil/solids removal• DAF/DNF – secondary oil water separator• Walnut shell filters for tertiary oil/water separation• Biological treatment – low COD or reuse• CPI separators - stormwater

Unit Processes

Integrated Solutions – Guaranteed System Designs

Treatment of Spent Caustic

• Raw water• Boiler feedwater• Wastewater for stingent discharge or reuse


Refinery Water and Wastewater: Integrated SolutionUnnamed Client, Cartagena, Colombia

Customer

Challenge

Objectives

• Reliable water treatment.• Double size of wastewater treatment system

using as much of existing assets as possible

• Doubling plant capacity required new watertreatment system.

• Wastewater treatment system on existing site.

• Largest oil company in Colombia

Wastewater treatment plant before expansion


Cartagena, Colombia


• New 2,000 gpm water treatment system.All new equipment on greenfield site.

• New 3,000 gpm wastewater treatmentsystem built among existing equipment.

Project description

Facts and figures• $15 million water treatment, $20 million

wastewater treatment• Sequencing Batch Reactor used in wastewater

treatment to ensure versatility.• Designed to incorporate powdered activated

carbon to meet tight phenol requirement.



• Basic engineering for water and wastewater treatmentsystems.

• Water treatment equipment: Clarifier, filters, ion exchange• Wastewater treatment equipment: API separators,

Dissolved Nitrogen Flotation, Sequencing Batch Reactors(SBR’s) for biological treatment, gravity sand filter,biological sludge dewatering.

Implemented products and services

Reason for choosing Siemens

• Siemens provided an integrated solution, which included:basic engineering and process equipment thatincorporated a process guarantee.

• Integrated solution approach ensures that the systemcomponents work together. Minimizes interface points.Siemens is responsible for a working system.

Biological Treatment

Above-ground API separators


Refinery Spent Caustic Treatment, Lima, PeruRepsol

Repsol

Challenge

Objectives

• Oxidize spent caustic so that it could be safelyneutralized and discharged.

• Refinery is near Lima, so Repsol wanted tominimize odor issues.

• Repsol owns the biggest refinery in Peru


Lima, Peru


Unit designed to treat 3 gpm of mixed spentcaustic

Project description

Facts and figures• Unit started up in 2005• >70% COD destruction• Sulfides to <1 mg/L (non-detect)• Effluent can be neutralized and sent to wastewater



• Modularized spent caustic treatment system including:• High pressure feed pumps• Heat exchangers• Reactor• Separator



• Siemens is the market leader in wet air oxidationtreatment of spent caustic

Spent caustic storage tanks

Spent caustics from left to right:Sulfidic, mixed, treated


Integrated Solution for Major Oil CompanyEthylene Plant, Singapore

Client

Challenge

Objectives

• Customer wanted an integrated solution afterexperience with the first train.

• Adding a second train in their ethylene unit• Wastewater treatment for the first train did not

work well as a system.

• Major oil company


Singapore


• 700 m3/hour wastewater treatment for anethylene production facility

• Reuse was required• Membrane bioreactor (MBR) was selected

as the treatment technology.

Project description

Facts and figures• 70% of wastewater reused



• CPI separator• Dissolved Nitrogen Flotation• Membrane bioreactor system (MBR)• High efficiency blowers• Belt press for biological sludge• Engineering to integrate the unit processes



• Siemens expertise with MBR• Proven capability as system integrator• Reliable supplier to the ethylene industry


Ethylene Spent Caustic TreatmentOver 45 installations

Various

Challenge

Objectives

• Sulfides to < 1 mg/L• Thiosulfates to < 100 mg/L

• Oxidize dangerous and odorous sulfides andmercaptans to enable neutralization andbiological treatment.

• Ethylene producers rely on Siemens mediumtemperature (200 C) wet air oxidation system topretreat their spent caustic.


Global installations


Modularized systems to minimize siteconstruction.

Projects installed in:• North America• South America• Europe• Asia

Project description

Facts and figures• Flow rates from 4 m3/hr to 20 m3/hr



• High pressure feed pumps• Compressor packages – skid mounted• Pipe-in-pipe heat exchangers• Reactor• Air/caustic separation units• Neutralization skids


Reason for choosing Siemens• Leader in ethylene spent caustic treatment• Over 80 years of experience• High alloy welding in-house• Guaranteed treatment

downstream, spent caustic and wastewater treatment · © siemens ag 20xx all rights reserved....

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