Ventilair Engineers Pvt. Ltd.

Ventilair Engineers Pvt. Ltd.

+91-7678697164

ventilairengineerspvtltd@gmail.com

Underground Sewage Treatment Plant (UG-STP)

Space-Saving | Odor-Free | Aesthetic Wastewater Management

VEPL’s Underground Sewage Treatment Plant is a fully concealed, silent, and efficient wastewater treatment solution designed for urban, commercial, and residential projects where space is limited or aesthetics are a priority. Built below ground level with access hatches, our UG-STPs ensure seamless integration into landscapes, basements, parking areas, or open spaces — without disrupting site utility or visual appeal.

Product Overview

Using advanced biological processes like MBBRSBR, or ASP, VEPL UG-STPs provide robust performance with minimal footprint and zero surface-level structures. Designed for zero noise, no odor, and user-friendly operation, these STPs are ideal for housing societies, hotels, institutions, malls, and commercial buildings.

 

 Technical Specifications

Parameter

Specification

Capacity
Range

5 KLD to 1
MLD

Technology

MBBR / SBR
/ ASP (customized per site)

Installation

Completely
below ground with surface access

Material
of Construction

RCC / MSEP
with anti-corrosive epoxy

Aeration
System

Fine
bubble diffused system

Automation

Manual /
Semi-auto / Fully automatic (PLC-based)

Odor
Control

Biofilter
/ Activated Carbon

Sludge
Handling

Sludge
Drying Beds / Dewatering System

Tertiary
Treatment

PSF + ACF
+ UV/Chlorination

Optional
Add-on

Ultrafiltration
(UF), SCADA remote monitoring

Compliance

Meets CPCB
/ SPCB norms

 

 

 Inlet & Outlet Water Quality Parameters

 Primary Treatment (Screening, Equalization,
Oil & Grease Trap)

Parameter

Inlet
Range

Outlet
Range

pH

6.5 – 8.5

6.5 – 8.5

BOD

250 – 400
mg/L

150 – 200
mg/L

COD

500 – 700
mg/L

300 – 450
mg/L

TSS

200 – 350
mg/L

100 – 150
mg/L

Oil &
Grease

20 – 50
mg/L

< 20
mg/L

 Secondary Treatment (Biological Reactor +
Clarifier)

Parameter

Inlet

Outlet

BOD

150 – 200
mg/L

< 30
mg/L

COD

300 – 450
mg/L

< 100
mg/L

TSS

100 – 150
mg/L

< 30
mg/L

Ammonia
(NH4)

20 – 40
mg/L

< 10
mg/L

 Tertiary Treatment (Sand Filter + Carbon
Filter + UV/Chlorine)

Parameter

Inlet

Outlet

BOD

< 30
mg/L

< 10
mg/L

COD

< 100
mg/L

< 30
mg/L

TSS

< 30
mg/L

< 5
mg/L

Pathogens

Present

99%
Removed

Odor &
Color

Mild

Removed

 Ultrafiltration (UF – Optional Final Polishing
Unit)

Parameter

Inlet

Outlet

BOD

< 10
mg/L

< 5
mg/L

TSS

< 5
mg/L

< 1
mg/L

Turbidity

< 5 NTU

< 1 NTU

Pathogen
Removal

90–95%

99.99%

Water
Quality

Suitable
for reuse

Gardening,
flushing, cooling towers

 

 Ideal Applications

  • Residential Apartments &
    Societies
  • Hotels, Resorts, & Villas
  • Commercial Complexes &
    Shopping Malls
  • Corporate Campuses & IT
    Parks
  • Educational Institutions &
    Hostels
  • Smart Cities & Urban
    Projects

 

Key
Features

  •  Completely Underground – Saves
    valuable surface space
  •  Odor-Free & Noise-Free
    Perfect for urban areas
  •  Modular & Expandable
    Future-ready design
  •  Low Maintenance – Minimal
    operational cost
  •  Water Reuse-Ready – Reduces water
    consumption
  •   Fully
    Automated Option
    – PLC / SCADA for remote monitoring
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