Baihuipu Releases UF Pretreatment Package for SWRO

Baihuipu has released a standalone ultrafiltration pretreatment package for seawater RO trains, aimed at plants whose conventional media filters struggle during algal blooms and storm-driven turbidity spikes. The first package was assembled last week for a coastal power station that currently sees SDI above the SWRO membrane limit several times a year. The skid uses pressurised hollow fibre modules with air scour and an automated pressure-decay integrity test, and it can be installed ahead of an existing RO line without replacing the downstream equipment.

Key Features and Benefits

Stable SDI When the Sea Changes

Media filters pass fine particles when the feed changes faster than the backwash cycle. Hollow fibre ultrafiltration puts a physical barrier in front of the RO membranes, so permeate SDI stays low even when raw turbidity climbs after a storm. That is the main reason a plant with seasonal blooms moves to UF. A related discussion worth reading here is SiC Wafer Fab Wastewater system. We set out the wider process route in membrane CIP service.

The skid is sized on peak turbidity rather than annual average. Coagulant dosing is available upstream for the bloom period, with the dose set from jar tests on the actual seawater rather than a default number. Plants dealing with comparable loads face many of the same trade-offs covered in Baihuipu Signs Overseas EPC Wastewater Plant Contract system.

Air Scour and an Integrity Test That Runs Itself

Backwash combines a water reverse flush with an air scour across the fibre bundle, which lifts the cake layer more effectively than water alone on organic-rich feed. The sequence is triggered by transmembrane pressure as well as a timer, so a sudden load does not wait for the next scheduled wash. The same selection criteria reappear in Biological Treatment of Agrochemical Wastewater, which is worth opening alongside this one.

A pressure-decay test runs automatically each shift. A broken fibre shows up as a failed decay test within hours instead of as a slow rise in RO fouling weeks later, which is how most fibre failures are actually discovered.

A Retrofit-Friendly Footprint

The package ships on one skid with its own feed pump, backwash pump, blower, dosing set, valves and control panel. It connects to the existing filtered water tank and the RO feed header through two flanged lines, so the plant keeps its current media filters as a roughing stage.

We check the available head, the existing tank turnover and the RO feed pump curve before fixing the layout. Most retrofit problems come from hydraulic interfaces, not from the membrane modules.

Technical Specifications

Package configuration compared with a conventional media filter ahead of SWRO:

Why Choose Baihuipu as Your Manufacturer

Two decades in this industry teaches you that most treatment problems are procurement problems in disguise. Someone bought the cheapest skid, nobody checked the equalisation volume, and eighteen months on the plant cannot hold its consent limit. We build differently.

Manufacturing Base in Guangdong

Owned production lines mean we control tolerances, materials and delivery. Standard modular units and bespoke skids are both built by our own people, so schedule commitments are ours to keep.

Documentation You Can Actually Audit

Each system ships with as-built drawings, material certificates, welding records and a functional specification. If a client's own consultant wants to review the process calculation basis, we hand it over rather than treating it as proprietary.

Experience Built the Hard Way

Since the early 2000s we have commissioned plants for food and beverage processors, chemical works, electroplaters, textile mills, mines and municipalities. The lessons that stick are scaling, fouling and sludge handling — those inform every design we issue.

Certification and Export Practice

CE marking is standard and we work to ISO 9001 procedures. Where a project calls for specific material grades, pressure vessel certification or ATEX-rated equipment, we build to that standard and ship the full documentation pack.

Complete Units and Turnkey Plants

Whether you need a single package unit or a turnkey installation with civil works, we deliver the entire treatment scheme. Our engineering team covers process, mechanical, electrical and automation so one party owns the outcome.

Spare Parts and After-Sales Support

We carry membranes, pumps, blowers, diffusers and instruments for every system we supply. Remote support through the PLC is standard on most builds, and on-site service covers commissioning, training and urgent callouts.

Let's Look at Your Numbers

Share your water analysis and site constraints and we will give you a straight assessment of the process route and the realistic operating cost before you commit to anything. Contact our engineers at WhatsApp: +86 13631765076, or find us at hkbhp.com.

WhatsApp: +86 13631765076

Customer FAQs

Is ultrafiltration pretreatment always needed before SWRO?

No. A well-run beach well intake with stable low turbidity can feed media filters directly. UF earns its place on open intakes with algal blooms, storm turbidity or tight SDI guarantees.

Can the package be added to an existing RO plant?

Yes, provided there is space and head for the skid and the existing feed pump can handle the added pressure loss. We survey those interfaces before quoting.

How often are the fibres replaced?

Typically several years on a well-operated plant, but it depends on oxidant exposure and cleaning chemistry. The integrity test tells you when a module needs attention instead of relying on a calendar.

Does UF remove dissolved salt?

No. It removes suspended solids, colloids and most microorganisms. Salt rejection remains the job of the RO membranes downstream. The operating detail behind this sits in desalination energy cost.

For adjacent technical angles, sic and gan wafer fabrication wastewater and SWRO Pretreatment with Ultrafiltration covers the same equipment from a different duty.