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