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
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📍 Chennai