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Sewage treatment plant (STP) designed by BEDC using biological treatment processes

Sewage Treatment Plant (STP) Design

Municipal & Residential Sewage Treatment Engineering

  • ✓ Safe Discharge
  • ✓ Reuse Capable
  • ✓ Low Odour Design
Sep 1, 2023 — Sep 30, 2024

Service Overview

Our STP Design service delivers complete sewage treatment solutions for residential complexes, commercial buildings, municipalities, and industrial campuses. We design biological treatment systems — including activated sludge, SBR, MBR, and constructed wetlands — producing treated effluent suitable for safe discharge or reuse in irrigation and flushing. All designs comply with DoE and national environmental standards.

Key Features & Capabilities

Biological Treatment Expertise

SBR, MBR, and conventional activated sludge for reliable organic and nutrient removal.

Compact & Modular Design

Space-efficient packaged STP solutions ideal for buildings and campuses.

Treated Water Reuse

Tertiary treatment for irrigation reuse, toilet flushing, and landscaping applications.

Odour & Nuisance Control

Enclosed systems with bio-filter or chemical scrubber odour management.

Systems Covered

Bar Screening & Grit Removal
Primary Sedimentation
Activated Sludge Process (ASP)
Sequencing Batch Reactor (SBR)
Membrane Bioreactor (MBR)
Nutrient Removal (N & P)
Tertiary Filtration & Disinfection
Sludge Thickening & Dewatering
Odour Control Systems
Treated Effluent Reuse Systems

Engineering Workflow

1

Sewage Flow & Load Estimation

Population equivalents, flow projections, and influent characterization for design basis.

2

Treatment Process Selection

Select appropriate biological process based on site constraints, reuse requirements, and budget.

3

Process Design & Calculations

Biological sizing, sludge production, aeration calculations, and hydraulic profile.

4

Detailed Engineering

Civil drawings, P&IDs, electrical design, and control system logic for full plant.

5

Construction Support & Commissioning

On-site support through civil, mechanical, and biological startup to performance handover.

Technical Specifications

Plant Capacity

10 - 1,000+ m³/day

Influent

Domestic sewage (residential / commercial)

BOD Effluent

< 20 mg/L (reuse grade)

TSS Effluent

< 30 mg/L

Faecal Coliform

< 200 CFU/100ml (reuse standard)

Discharge Standard

DoE Bangladesh Class A/B

Reuse Suitability

Irrigation, flushing, landscaping

Automation

PLC with alarm and remote monitoring

Project Deliverables

Sewage Flow & Load Report
Treatment Process Selection Report
Design Basis Document
Process Flow Diagrams (PFD)
P&ID Drawings
Civil & Structural Drawings
Mechanical Equipment Specifications
Electrical & Control Design
Sludge Handling & Disposal Plan
Odour Control Design
Bill of Materials (BOM)
Operation & Maintenance Manuals
Performance Test Report
Environmental Compliance Certificate

Industries We Serve

Residential Complexes & Housing

Commercial Office Buildings

Hotels & Hospitality

Hospitals & Healthcare

Educational Institutions

Industrial Campuses

Municipalities

Eco-Resorts & Tourism