Sr. STP Mechanical Design Engineer-Sewage Treatment Plant

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: o AutoCAD o SolidWorks o 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