Industrial Water Treatment
Design and delivery of process and potable water systems.
Water · Wastewater · Process Engineering
Engineering Water.
Engineering Process.
Engineering the Future.
Design, procurement, construction and commissioning of industrial water treatment, wastewater and process systems for the oil, gas and petrochemical industries.
The Challenge
Water is industry's scarcest resource.
Industrial operations face tightening water availability, stricter environmental limits and rising operating costs. Every cubic metre not recovered is a cost paid twice.
210,000 m³/day
RO water production capacity
40,000 m³/day
Wastewater treatment capacity
20+
Projects delivered
5
Founding engineers
The Engineering
From study to commissioning.
We cover the full engineering cycle — feasibility studies and process design through procurement, construction, installation, commissioning and support.
Water Treatment Engineering
- Studies & conceptual design
- Basic & detailed design
- Equipment selection and sizing
- Process calculations
Wastewater Engineering
- Biological & chemical processes
- Recovery and reuse
- ZLD design
- Environmental studies
Electrical & Instrumentation
- Power and control panels
- Instrumentation & metering
- Automation and SCADA
- Protection & safety systems
Construction & Operation
- Civil and mechanical works
- Installation & commissioning
- Operation and maintenance
- Operator training
Project Control
- Planning and scheduling
- Cost and budget control
- Progress reporting
- Risk management
Our Expertise
Our Expertise
Six disciplines our engineering is built on.
Our Engineering Approach
Our Engineering Approach
Five steps from understanding the problem to optimising operation.
- 01
Understand
Analyse feed quality, discharge requirements and site constraints.
- 02
Engineer
Select technology from real data and operating economics.
- 03
Design
Basic and detailed design, equipment sizing and fabrication documents.
- 04
Execute
Procurement, construction, installation and commissioning to stable handover.
- 05
Optimise
Performance monitoring, energy reduction and improved water recovery.
The Technology
The technologies we deploy.
Technology selection follows feed water quality, discharge requirements and project economics — not a predetermined solution.
Reverse Osmosis
Reverse Osmosis (RO)
Design and delivery of reverse osmosis units for industrial process water, boiler feed water and high-purity applications.
- Reverse Osmosis (RO)
- Ultrafiltration (UF)
- Nanofiltration (NF)
- Demineralization
- Softener & multimedia filters
- Activated carbon filtration
Air Separation Unit
Air Separation Unit (ASU)
Engineering and design of cryogenic air separation units for industrial gas production.
- Oxygen production
- Nitrogen production
- Argon production
- Storage & distribution systems
Wastewater Treatment
Industrial Wastewater Treatment
Treatment of industrial, petrochemical and refinery effluent for water recovery and environmental compliance.
- Industrial effluent
- Petrochemical effluent
- Refinery effluent
- Recovery & reuse
- Zero Liquid Discharge (ZLD)
Technology & Engineering
We don't sell equipment. We engineer the process.
From membrane selection and high-pressure pump sizing to control philosophy and instrumentation — every element follows the project's real data.
The Solution
Single-point project responsibility.
Project delivery under EPC, EPCM, Turn-Key and Design & Build models, with one accountable party from design to handover.
Wastewater Treatment
Treatment and recovery of industrial and petrochemical effluent.
RO Systems
Design, fabrication and commissioning of reverse osmosis units.
Air Separation (ASU)
Engineering of air separation and industrial gas units.
Engineering & Design
Feasibility, conceptual, basic and detailed design.
Procurement
Sourcing from qualified domestic and international manufacturers.
Construction
Mechanical, piping, electrical and instrumentation execution.
EPC
Integrated responsibility for design, procurement and construction.
Project Delivery Models
EPCEPCMTurn-KeyDesign & Build
Industries Served
Oil
Gas
Petrochemical
Steel
Power
Food
Pharmaceutical
Mining
Water & Wastewater
Chemical
Industries We Serve
Industries We Serve
From refineries and petrochemicals to water infrastructure.
Oil & Gas
Process, cooling and produced water across upstream and downstream facilities.
Petrochemical
Demineralised water, effluent recovery and industrial gas supply.
Process Industries
Steel, mining, food and pharmaceutical plants requiring controlled water quality.
Water Infrastructure
Water and wastewater treatment plants and reuse schemes.
The Projects
What we have built.
Execution record across oil, gas, petrochemical, steel and process industries.
Industrial Wastewater Treatment Plant
- Client
- Industrial client
- Capacity
- 8,000 m³/day
- Location
- Special Economic Zone
- Year
- 2023
Air Separation Unit (ASU)
- Client
- Petrochemical complexes
- Capacity
- High-purity nitrogen
- Location
- Assaluyeh Region
- Year
- 2024
Water Treatment (RO & DM Water Production)
- Client
- Zinc & acid production plants
- Capacity
- Process and demineralised water supply
- Location
- Zanjan Province
- Year
- 2023
Technical Notes
Engineering Gallery
Cards and diagrams from the Sepehr engineering team — a visual look at the concepts we work with every day.
Explainer card: COD, BOD and TSS in industrial wastewater treatment
Articles & Media
Articles & Media
Technical articles from the Sepehr engineering team — free to read and download.
ArticleInvestigation of Pre-Purification Unit in Cryogenic Air Separation
Conference paper on the role of activated alumina and molecular sieve adsorbents in removing moisture and CO₂ before the cold box, and the factors that deactivate them.
View →
ArticleSeparating the Inseparable
Technical note on what reverse osmosis and cryogenic distillation teach each other: the thermodynamic minimum work of separation, and three constraints the two technologies share.
View →Message from the CEO
At Sepehr Process Development Engineering, we do not regard engineering as merely the execution of a project — we regard it as the process of creating durable, precise and dependable solutions.
Our focus is on delivering engineering solutions in water and wastewater treatment, Reverse Osmosis (RO), Air Separation Units (ASU) and process engineering — fields in which design quality, technology selection and correct execution bear directly on the productivity and sustainability of industry.
Drawing on technical knowledge, engineering judgement and a real understanding of industrial requirements, we aim to deliver solutions that answer today's needs while remaining dependable against the challenges industry will face tomorrow.
For us a project is never simply a contract; it is a client's trust, and an opportunity to create an engineering solution that lasts.
We believe the path of industrial development runs through precise engineering, appropriate technology and a commitment to quality — and along that path we hold ourselves accountable to stand beside our clients and industrial partners in building better and more sustainable solutions.
Dr. Peyman Mahmoudi
Chief Executive Officer, Sepehr Process Development Engineering
The Company
Who we are.
Who We Are
Sepehr Process Development Engineering Company was founded to deliver engineering solutions across the water, energy and process industries.
What We Do
Design and execution of industrial projects focused on productivity, energy efficiency and resource recovery.
Our Expertise
Water treatment, wastewater treatment, reverse osmosis, air separation and process equipment for oil, gas and petrochemical plants.
Our Approach
Technology selection driven by real project data, operating economics and environmental requirements.
Mission
To turn industrial water and wastewater challenges into sustainable, reliable engineering solutions. Through technical knowledge and engineering capability, we deliver water, wastewater and process systems that increase productivity, reduce costs, protect water resources and support sustainable industrial development.
Vision
To become one of the most credible and capable engineering companies in the region across water, wastewater and industrial process sectors, and a trusted partner to the oil, gas, petrochemical and heavy industries. We focus on innovation, technical development, execution quality and sustainable, economical solutions.
Values
Execution qualityInnovationClient commitmentSafetyEnvironmental protectionSustainabilityAccountability
Contact
Have a project in mind?
Send us your project parameters. Our engineering team will review and return a technical proposal.
Address
No. 18, Golagin Alley, Shadman St., Tehran, Iran
Working Hours
Saturday–Wednesday, 8:00–17:00