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.

- 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.
- 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.
- Engineering Calculations

Perform calculations for: • Pump sizing • Pipe sizing • Flow rates • Pressure losses • Power requirements
- Ensure equipment efficiency and reliability.




- 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: o AutoCAD o SolidWorks o Autodesk Inventor
- Coordination

Coordinate with: • Civil engineers • Electrical engineers • Process engineers • Contractors Ensure mechanical systems integrate properly with plant structures and controls.
- 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

📌 Sr. STP Mechanical Design Engineer-Sewage Treatment Plant (Chennai)
🏢 Sage Metrics Services
📍 Chennai