Sr. Mechanical Design Engineer

Job Title: Mechanical Design Engineer – Sewerage Treatment Plant (STP)

Experience: 8+ years

Location: Chennai

Industry: STP/Water Treatment/RO

Job summary: A Mechanical Design Engineer working in a sewerage treatment plant (STP) is responsible for designing, selecting, and supporting the installation of mechanical equipment used to treat wastewater safely and efficiently

1.Design Responsibilities-

• Design mechanical systems used in wastewater treatment processes.
• Prepare equipment layouts, piping layouts, and mechanical drawings.

Design systems for:

• Pumps
• Blowers
• Mixers
• Screens
• Sludge handling equipment
• Aeration systems

Ensure designs meet project specifications, environmental regulations, and safety standards.

2\. Equipment Selection-

• Select suitable equipment based on plant capacity and process requirements.
• Evaluate vendor technical specifications.
• Prepare technical data sheets for equipment procurement.
• Review supplier drawings and approve them.

3\. Engineering Calculations-

Perform calculations for:

• Pump sizing
• Pipe sizing
• Flow rates
• Pressure losses
• Power requirements
• Ensure equipment efficiency and reliability.

4\. Drawings and Documentation-

Prepare and review:

• Material Submittal preparation
• Mechanical General Arrangement (GA) drawings
• Piping and Instrumentation Diagrams (P&ID)
• Equipment layout drawings
• Fabrication drawings

Use software like:

• AutoCAD
• SolidWorks
• Autodesk Inventor

5\. Coordination-

Coordinate with:

• Civil engineers
• Electrical engineers
• Process engineers
• Contractors

Ensure mechanical systems integrate properly with plant structures and controls.

6\. Site Support-

Provide technical support during:

• Equipment installation
• Commissioning
• Testing

Key Skills Required:

• Mechanical system design
• Knowledge of wastewater treatment processes
• CAD software proficiency
• Equipment sizing and selection
• Understanding of piping systems
• Project coordination skills

Typical Employers:

• Environmental engineering companies
• Water utility companies
• EPC contractors