Design Engineer

Key Responsibilities

1. Process Design & System Engineering

• Design complete sewage treatment systems based on:
  • Sewage flow rate (KLD / MLD)
  • Inlet water characteristics
  • Required outlet quality
  • Site conditions
  • Client specifications
• Select suitable treatment technologies such as:
  • Moving Bed Biofilm Reactor (MBBR)
  • Sequential Batch Reactor (SBR)
  • Membrane Bioreactor (MBR)
  • Activated Sludge Process
• Develop treatment flow schemes based on project requirements.
• Optimize process efficiency while reducing operational costs.

2. Engineering Calculations

Perform design calculations for:

• Tank sizing
• Hydraulic retention time (HRT)
• Organic loading calculations
• Air requirement calculations
• Pump head calculations
• Blower sizing
• Pipe sizing
• Sludge generation calculations
• Chemical dosing calculations

When working on hydraulic design, common calculations include:

$Q = A \times V$Q=A×V

Where:

• Q = Flow rate
• A = Cross-sectional area
• V = Velocity

And for pump power:

$P = \rho g Q H$P=ρgQH

3. Equipment Selection

Select and specify:

• Pumps
• Blowers
• Diffusers
• Agitators
• Clarifiers
• Screens
• Filters
• Dosing systems
• Control panels
• Instrumentation

Prepare technical specifications for procurement and manufacturing.

4. Engineering Drawings & Layouts

Prepare and review:

• General arrangement drawings
• Process flow diagrams (PFD)
• Piping & instrumentation diagrams (P&ID)
• Equipment layout drawings
• Tank layouts
• Foundation drawings
• Pipeline routing drawings

Using engineering software such as:

• AutoCAD
• SolidWorks
• Autodesk Revit (if required)

5. Documentation & Technical Reports

Prepare:

• Design basis reports
• Calculation sheets
• Bill of materials (BOM)
• Technical datasheets
• Operation philosophy documents
• Equipment specifications
• Compliance documentation

Ensure all documentation follows project standards.

6. Cross-Functional Coordination

Coordinate with:

• Proposal team
• Procurement team
• Production team
• Site execution team
• Commissioning engineers
• Clients and consultants

Provide technical clarifications during project execution.

7. Compliance & Standards

Ensure designs comply with:

• Central Pollution Control Board guidelines
• Telangana State Pollution Control Board norms
• Municipal discharge standards
• Safety and engineering standards

Required Qualifications

• B.E / B.Tech in:
  • Civil Engineering
  • Mechanical Engineering
  • Environmental Engineering
  • Chemical Engineering

Required Skills

• Process engineering
• Hydraulic calculations
• Equipment sizing
• CAD drafting
• Technical documentation
• Problem-solving
• Project coordination
• Analytical thinking

Preferred Experience

• Freshers with strong engineering fundamentals OR
• 1–5 years in:
  • STP
  • ETP
  • WTP
  • Industrial utility systems

Key Performance Indicators (KPIs)

• Accuracy of designs
• Optimization of project cost
• Zero design errors during execution
• On-time design submission
• Compliance approval success rate

Career Growth Path

Design Engineer → Senior Design Engineer → Lead Design Engineer → Engineering Manager → Technical Director

This role is ideal for engineers who enjoy combining calculations, creativity, and practical engineering to build real wastewater infrastructure.