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Reverse Osmosis: the final purification step in every SBS plant

High-recovery industrial RO systems, built standalone or integrated into every Condensate Polishing Unit, Water Treatment Plant and Effluent Treatment Plant we deliver, so your treated water is truly fit for reuse.

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RO skids under a covered process shed at Ambalika Sugars
  • 85-90%Recovery with high-efficiency RO designs
  • Every plantCPU, WTP & ETP come with RO purification
  • < 100 ppmPermeate TDS in our RO-based CPU
  • 4,400 KLPDLargest RO-based plant (NSL Sugars)
Overview

What is Reverse Osmosis?

Reverse Osmosis (RO) is a membrane process that applies high pressure to push water through a semi-permeable membrane. Water molecules pass through; dissolved salts, organics, colour, bacteria and other impurities are rejected. The result is purified water (permeate) and a small concentrated stream (reject).

Conventional treatment, whether clarification, filtration or biological treatment, removes suspended solids and much of the organic load, but it cannot remove dissolved salts. RO is the step that does. That is why SBS Water & Infra Projects Pvt. Ltd. treats RO as the final purification stage of every plant we build.

  • Removes dissolved salts (TDS) and residual organics
  • Turns treated water into reusable water
  • Built into every CPU, WTP and ETP we deliver
Indoor RO membrane skid with high-pressure pumps
RO in Every SBS Plant

One integrated scheme, from pre-treatment to pure water

Every CPU, WTP and ETP we deliver includes RO purification. The upstream plant acts as RO pre-treatment, and the RO delivers the final water quality.

Rooftop RO and polishing skids of the distillery CPU at Indo Nuclear

CPU + RO

How RO is added
Two-stage RO (RO-I + RO-II on RO-I reject) after cooling, neutralization and dual media filtration.
Result
About 85% condensate recovery; permeate TDS below 100 ppm.
Explore CPU
RO skid with membrane housings next to water treatment filters

WTP + RO

How RO is added
RO after clarification, multigrade and carbon filtration (and softening where needed).
Result
Low-TDS water for process, cooling tower and boiler pre-treatment.
Explore WTP
Ultrafiltration modules feeding the RO stage

ETP + UF + RO

How RO is added
UF after tertiary filtration removes fine solids; RO then removes dissolved salts and residual organics.
Result
Treated effluent recovered for process / cooling reuse; a step to ZLD.
Explore ETP

Why integrate RO from day one?

One design and one supplier, so pre-treatment is matched exactly to membrane needs. That means higher recovery, longer membrane life, fewer cleanings, water fit for process and boiler pre-treatment, and a ready pathway to Zero Liquid Discharge.

Our RO Solutions

RO for every stream

RO-based condensate polishing skid at Shri Pandurang SSK

RO-Based Condensate Polishing

Two-stage RO after cooling, alkali dosing, flocculation and DMF.

  • RO-I ~67%, RO-II 50-55% on reject
  • ~85% total recovery
  • Permeate for cooling tower reuse
RO trains treating distillery condensate at Satish Sugars

RO for Spent Wash Condensate

Dedicated RO plants recovering water from one of the distillery industry's toughest streams.

  • Handles high-COD, acidic feed
  • Robust pre-treatment
  • Water for fermentation & dilution
Ultrafiltration modules with pre-filter vessel for effluent recycling

UF + RO for Effluent Recycling

UF followed by RO recovers treated effluent for process and cooling reuse.

  • Balrampur: 2,400 KLPD ETP + UF + RO
  • Balrampur: 4,200 KLPD UF + RO post-CPU
  • Pathway to ZLD
Pressure vessels and RO skid for raw and process water

RO for Raw & Process Water

RO after WTP pre-treatment for low-TDS water.

  • Process & cooling tower make-up
  • Boiler feed pre-treatment (with DM)
  • Consistent quality year-round
Standalone RO plant installed under a shed

Standalone & Retrofit RO

Standalone RO plants and RO add-ons for existing CPUs, WTPs and ETPs.

  • Capacity enhancement
  • Membrane upgrades
  • Minimal disruption to operations
RO plant by SBS Water with membrane pressure tubes, cartridge filters, dosing pumps and vertical high-pressure pumps

RO Service & Optimization

Keeping membranes performing for the long term.

  • Clean-In-Place (CIP) systems
  • Performance troubleshooting
  • Online pH, TDS, ORP monitoring
Process

How our RO system works

Water from the upstream CPU, WTP or ETP is conditioned, filtered and passed through two RO stages for maximum recovery.

Reverse osmosis system process flowWater from the CPU, WTP or ETP passes pre-filtration or ultrafiltration, the RO feed tank, dosing and cartridge filter, then RO-I. RO-I reject is treated again in RO-II; permeate from both stages goes to the permeate tank (about 85-90% overall recovery) for process and cooling reuse, and RO-II reject goes to the ETP or ZLD.From CPU / WTP / ETPRO-I rejectRO-II permeateRO-I permeatePre-filtration/ UFRO Feed TankDosing +Cartridge FilterRO-IFirst stageRO-IIReject recoveryPermeate Tank~85-90% recoveryRO-II Reject→ ETP / ZLDReuseProcess & cooling
Pre-treatmentMembranesPermeateReuseRejectPermeate lineSwipe to see the full flow
Typical Performance

What RO delivers

From our 4,400 KLPD RO-based CPU for NSL Sugars.

ParameterRaw CondensateRO Permeate
TDS600 ppm< 100 ppm
COD6,000 ppm< 300 ppm
BOD2,500 ppm< 100 ppm
Volatile Acidity2,500 ppm< 250 ppm
Turbidity5 NTU< 2 NTU
pH3.5 - 4.56.5 - 8.0

Actual performance depends on feed water characteristics; each RO is designed after analysing the client's water.

Key Features

Engineered for high recovery and long membrane life

  • High recovery

    High-efficiency designs for 85-90% recovery with minimum reject.

  • Two-stage RO

    RO-II treats RO-I reject to lift overall recovery.

  • Matched pre-treatment

    Cooling, pH correction, DMF, ACF and UF tuned to the feed.

  • Modular trains

    Parallel trains (e.g., 2 × 100 m³/h) for flexibility and maintenance.

  • Proven components

    CNP / Xylem / Grundfos pumps; Hitech / Torrey UF; SBS-made housings.

  • PLC automation

    Delta / Siemens panels with online pH, TDS, conductivity and ORP.

RO membrane housings stacked in a rack
Benefits

What RO adds to your plant

  • Highest water purity - removes dissolved salts and organics conventional treatment cannot.

  • Maximum recovery - 85-90% of feed recovered as reusable water.

  • Lower freshwater use - cuts raw water drawal significantly.

  • Equipment protection - low-TDS water reduces scaling in cooling towers and boilers.

  • Compliance & sustainability - reuse instead of discharge; supports ZLD.

  • Scalable - compact, modular systems that expand with demand.

  • Cooling Tower Make-upLow-TDS water
  • Process & FermentationConsistent quality
  • Boiler Feed Pre-treatmentWith DM
  • Effluent Recycling & ZLDWater recovery
Proven Track Record

RO-based plants for leading sugar & distillery groups

RO skids and pressure vessels inside the condensate polishing hall built by SBS Water at Belgaum Sugars
Featured Project

NSL Sugars Ltd., Beed (Maharashtra)

4,400 KLPD RO-based CPU with two RO-I trains and RO-II reject recovery, producing low-TDS permeate for cooling tower reuse.

  • 4,400 KLPDPlant capacity
  • ~85%Overall recovery
  • 2 × 100 m³/hRO-I trains
  • < 100 ppmPermeate TDS
Degasser tower, pressure filters and RO trains of the 4,200 KLPD sugar CPU at Belgaum Sugars
Belgaum Sugars - 4,200 KLPD Sugar CPU
Multi-stage RO trains under the canopy of the RO-based condensate polishing unit at Shri Pandurang SSK
Shri Pandurang SSK - 1,500 KLPD RO-based CPU
Indoor RO membrane rack
RO membrane rack
Row of high-pressure pumps feeding the RO trains
High-pressure pumps
Motor control and PLC panel with operator display
PLC control panel
ClientPlantCapacity
NSL Sugars Ltd., BeedRO-based CPU & WTP4,400 KLPD
Balrampur Chini Mills, Balrampur UnitUF + RO Post CPU4,200 KLPD
Balrampur Chini Mills, BalrampurETP + UF + RO2,400 KLPD
Belgaum Sugars Ltd., BelgaumSugar CPU4,200 KLPD
Ugar Sugar Works, KarnatakaCPU2,500 KLPD
Kamakhya Biofuels Pvt. Ltd., GuwahatiWTP & CPU3,000 KLPD
Why SBS Water

Why industries choose us

  • 01

    RO in every plant

    Designed into every CPU, WTP and ETP, not added as an afterthought.

  • 02

    Proven high recovery

    85-90% recovery designs, proven at 4,400 KLPD scale.

  • 03

    Single-source supplier

    Pre-treatment, RO, reject management and ZLD from one partner.

  • 04

    In-house manufacturing

    Housings, vessels and panels made at our Talawade facility.

  • 05

    New plants & retrofits

    Standalone RO and add-ons to existing systems.

  • 06

    Regional presence

    Offices in Pune, Talawade and Nipani for faster service.

FAQs

Frequently asked questions

What is Reverse Osmosis?

RO uses high pressure to push water through a semi-permeable membrane. The membrane lets water pass but rejects dissolved salts, organics, colour and microorganisms, producing purified water (permeate) and a small concentrated reject stream.

Why does SBS add RO to every CPU, WTP and ETP?

Conventional treatment removes suspended solids and much of the organic load, but not dissolved salts. RO removes TDS and residual organics, turning treated water into high-quality water fit for reuse. Adding it to every plant maximizes the value of the water you treat.

What recovery can I expect?

Our high-efficiency RO designs are engineered for 85-90% recovery. In our RO-based CPU, two-stage RO (RO-I ~67%, RO-II 50-55% on RO-I reject) achieves about 85% overall recovery.

What happens to the RO reject?

RO reject is a small, concentrated stream. Depending on the plant, it is sent to the ETP, used in suitable applications, or concentrated further in evaporators for Zero Liquid Discharge.

Why is pre-treatment important for RO?

Membranes foul quickly if suspended solids, oil, high temperature or wrong pH reach them. Our CPUs, WTPs and ETPs act as RO pre-treatment, keeping feed water within membrane limits, extending membrane life and reducing cleaning.

Can you add RO to an existing plant?

Yes. We assess your existing CPU, WTP or ETP and add UF / RO stages, upgrade membranes or increase RO capacity, often without replacing the whole plant.

Get more from every drop you treat

Planning a CPU, WTP or ETP, or want to add RO to an existing plant? Share your water analysis and our engineers will design the right RO scheme.

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