Water & Wastewater — Core Service

Treatment Plants

Designing water, sewage, and effluent treatment plants that meet regulatory standards and deliver long-term operational reliability.

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30+
Treatment Plants Designed
500+
MLD Total Capacity
WTP, STP, ETP
Plant Types Covered
100%
CPCB / SPCBs Compliance

OVERVIEW

Process Engineering for Clean & Safe Water

HRP Infra delivers comprehensive design and engineering services for water treatment plants (WTPs), sewage treatment plants (STPs), and effluent treatment plants (ETPs). Our process engineers work from first principles — selecting the most appropriate treatment technology based on raw water quality, effluent standards, site conditions, and lifecycle costs.

We provide complete services from process design and layout planning through to structural drawings, electro-mechanical specifications, and construction supervision — ensuring every plant is commissioned to its full design capacity.

  • Water Treatment Plant (WTP) Design
  • Sewage Treatment Plant (STP) Design
  • Effluent Treatment Plant (ETP) Design
  • SCADA & Automation Specifications
  • Environmental Impact Assessment Support
  • Operation & Maintenance Manuals
Our Services Request a Consultation
Treatment plant designed by HRP Infra
Compliant Design

PLANT TYPES

Treatment Technologies We Design

Water Treatment Plant

Water Treatment Plant (WTP)

We design conventional and advanced WTPs using processes calibrated to source water quality — producing potable water compliant with IS:10500 and WHO guidelines.

  • 1
    Intake & Raw Water Pumping

    Design of river/reservoir intakes, approach channels, and raw water pump stations with appropriate sump and screen configurations.

  • 2
    Coagulation & Flocculation

    Flash mixers, clari-flocculators, and tube settlers designed for optimal coagulant dosing and floc formation.

  • 3
    Sedimentation & Filtration

    Horizontal/vertical flow clarifiers and rapid sand filters with backwash systems for particle removal and turbidity reduction.

  • 4
    Disinfection & Clear Water Storage

    Chlorination systems (gas, liquid, UV) sized for CT value compliance, followed by clear water reservoirs for treated water storage.

Sewage Treatment Plant

Sewage Treatment Plant (STP)

Our STP designs employ ASP, SBR, MBR, MBBR, and UASB technologies selected on the basis of inlet sewage characteristics, land availability, and treated effluent reuse requirements.

  • 1
    Preliminary Treatment

    Screens, grit chambers, and flow equalization tanks to remove coarse solids and dampen hydraulic load variations.

  • 2
    Primary Treatment

    Primary settling tanks for removal of settleable organics and suspended solids, with sludge collection and transfer systems.

  • 3
    Secondary (Biological) Treatment

    Aerobic and/or anaerobic biological processes including aeration tanks, secondary clarifiers, and sludge return systems.

  • 4
    Tertiary Treatment & Reuse

    Tertiary filtration, nutrient removal, and UV/chlorination disinfection for effluent meeting CPCB norms or reuse criteria.

Effluent Treatment Plant

Effluent Treatment Plant (ETP)

We design industrial ETPs tailored to specific effluent streams — food processing, textiles, pharmaceuticals, and petrochemicals — ensuring compliance with CPCB / SPCB discharge norms.

  • 1
    Effluent Characterisation

    Detailed laboratory analysis and treatability studies to define design influent parameters and process selection criteria.

  • 2
    Physico-Chemical Treatment

    pH correction, coagulation, flocculation, and chemical precipitation for heavy metals and suspended solids removal.

  • 3
    Biological Treatment

    Aerobic / anaerobic biological stages for BOD and COD reduction to meet consent order limits.

  • 4
    Sludge Management & Disposal

    Sludge thickening, dewatering (filter press / centrifuge), and disposal strategy in accordance with Hazardous Waste Rules.

WHAT WE OFFER

Full-Scope Engineering Services

Process Design

Selection of unit operations, process flow diagrams (PFDs), mass balances, and sizing calculations for all treatment units based on influent quality and discharge standards.

Structural & Civil Design

Structural design of tanks, chambers, and buildings including M&E integration, foundations, and waterproofing in compliance with IS codes.

Electro-Mechanical Specifications

Equipment specifications for pumps, blowers, mixers, dosing systems, and panels including technical bid evaluation support during procurement.

SCADA & Automation

Control philosophy development, SCADA architecture design, and instrumentation specifications to enable remote monitoring and automated process control.

Environmental Clearance Support

Preparation of EIA reports, environmental management plans, and NOC applications to support regulatory approvals for new and upgraded plants.

Commissioning & O&M Manuals

On-site commissioning supervision, performance testing, and preparation of comprehensive O&M documentation to transfer knowledge to plant operators.

STANDARDS & COMPLIANCE

Designed to Regulatory Standards

CPHEEO Manual

Water supply and treatment design per Central Public Health & Environmental Engineering Organisation guidelines.

CPCB / SPCB Norms

Effluent discharge standards defined by the Central and State Pollution Control Boards for all plant types.

BIS / IS Codes

Structural, civil, and mechanical design as per applicable Bureau of Indian Standards specifications.

WHO / IS:10500

Treated water quality benchmarked against WHO drinking water guidelines and Indian potable water standards.

CODES & STANDARDS

Designed to CPHEEO, BIS & Pollution Norms

Our WTP, STP, and ETP designs are governed by national public-health manuals, BIS standards, and statutory effluent and emission norms.

Process & Treatment Manuals
  • CPHEEO Manual — Water supply & treatment
  • CPHEEO Manual — Sewerage & sewage treatment
  • IS 10500 — Drinking water specification
  • WHO Guidelines — Drinking-water quality
  • IS 3025 — Water/wastewater test methods
  • USEPA Norms — Reference treatment criteria
Pollution & Discharge Norms
  • CPCB / GPCB — Effluent discharge standards
  • EP Act 1986 — General discharge standards
  • IS 2490 — Limits for industrial effluents
  • IS 3306 — Effluents for irrigation reuse
  • ZLD Norms — Zero liquid discharge criteria
  • NGT Directions — STP reuse compliance
Structural & Mechanical Codes
  • IS 3370 — Liquid-retaining concrete
  • IS 456 — Plain & reinforced concrete
  • IS 1893 — Earthquake-resistant design
  • IS 875 — Design loads
  • IS 5600 — Sewage & drainage pumping
  • IS 2911 — Pile foundations
Treatment process design, structural detailing, and effluent compliance follow the latest CPHEEO manuals, BIS codes, and the prevailing CPCB / GPCB discharge norms applicable to the project location and category.

Planning a Treatment Plant?

Our process engineers are ready to assess your requirements and propose the most appropriate and cost-effective treatment solution.

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