Baihuipu Delivers Brackish Water RO System to Industrial Park

Baihuipu has delivered a brackish water RO system to an industrial park in inland China where the local borehole supply runs between 4,500 and 7,000 mg/L TDS and had been supplemented by trucked water for years. Commissioning finished last week, and the plant now supplies 1,200 m3 per day of low-salinity water for boiler make-up, cooling towers and general washing. The line uses a two-pass RO arrangement with degassing between stages, because the feed carries elevated silica and bicarbonate that a single pass would leave close to the site limits.

Key Features and Benefits

Two Passes for a Difficult Feed

The first pass removes the bulk of the salt; a degasser drops carbon dioxide; the second pass polishes permeate down to the conductivity the boiler water treatment station expects. Running the second pass only on first-pass permeate keeps its membrane area small and its cleaning frequency low. For the reuse angle specifically, Baihuipu Upgrades RO Brine Concentration Membrane System goes further than we can here.

We set out the wider process route in energy recovery device.

Silica was the reason for the extra stage rather than simply more membrane area. At the measured feed concentration and the recovery the park wanted, a single pass would put silica close to saturation in the concentrate, so the design raises recovery in stages instead. The process logic sits close to what is described in Baihuipu Showcases Water Treatment Systems at Industry Expo, particularly on the pretreatment side.

Recovery Set by the Concentrate, Not the Headline

Design recovery is 72 percent on the first pass, with the concentrate routed to the park evaporation pond. We checked the scaling tendency against the actual seasonal borehole analysis, including the wet-season spike in calcium and sulphate, rather than the single sample that came with the enquiry. We have written about the downstream implications separately in Building a Reuse System the Fab Will Trust.

Antiscalant dosing, an ORP monitor ahead of the membranes and a flush sequence on every stop are part of the standard package. They are unglamorous, but they are what keeps a brackish plant running between service visits.

A Handover the Site Team Can Operate

The control panel logs feed conductivity, differential pressure, normalised permeate flow and recovery every shift, so a drop in performance shows up as a trend rather than as a surprise. Operators were trained on normalisation, because raw flow readings move with feed temperature and mislead people into unnecessary cleaning.

As-built drawings, membrane loading lists, the dosing calculation sheet and a cleaning procedure were handed over at commissioning. Spares for the dosing pumps, cartridge housings and instruments are held at the park.

Technical Specifications

Design basis and delivered figures for the park installation:

Why Choose Baihuipu as Your Manufacturer

Picking a supplier for this kind of plant is mostly about who carries the risk when something goes wrong. We have built this equipment for more than twenty years, and we are the ones who fabricated it, programmed the controls and will still answer the phone three years from now.

Own Factory, Real Capacity

Tanks, skids, control panels and membrane housings are built in our own Guangdong facility. Nothing critical is subcontracted, which is why we can commit to delivery dates and hold quality across a batch instead of hoping the shop floor gets it right.

Two Decades of Field Data

Food and beverage, chemicals, electroplating, textile dyeing, mining, municipal work — we have commissioned across all of them. The useful part is not the project count, it is having seen how plants fail in year seven and designing those failures out.

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.

Spares, Service and Commissioning

Membranes, dosing pumps, diffusers, instrumentation and blowers are stocked for the systems we sell. Our control systems support remote diagnostics, and we can put an engineer on site for commissioning, training or an unplanned shutdown.

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

When is a two-pass brackish water RO system worth the extra cost?

When the downstream user needs low conductivity, or when silica, boron or bicarbonate sit close to saturation at the recovery you want. A single pass with more area does not solve a scaling limit.

How is the recovery figure chosen?

From a full feed analysis and a scaling calculation across the seasonal range, not just the average. Where feed quality swings, we design to the worst month and allow the control system to back off recovery.

Can the plant use an existing borehole and storage tank?

Usually yes. We check the pump curve, the intake screen and the tank turnover, then add only the pretreatment and membrane line. Most park projects keep the existing civil assets.

What routine work does the operator have?

Cartridge filter changes, dosing tank top-up, a weekly normalised performance review and CIP when differential pressure or salt passage crosses the set point. Expect one to two hours per shift. The operating detail behind this sits in brine minimization.

For adjacent technical angles, Baihuipu Expands Evaporation Crystallization Production and Baihuipu Updates Certification and Quality Management covers the same equipment from a different duty.