Industrial wastewater treatment is a process route, not a single machine purchase. Membranes, evaporation, crystallisation, biological treatment, electrochemical processes and sludge reduction may all be relevant, but their position depends on the feed, the reuse target and what must leave the system at the end.
Begin with a representative water profile
Provide flow by hour and day, temperature, pH, conductivity or total dissolved solids, COD, hardness, silica, metals, oil, suspended solids and the compounds most likely to foul, scale, corrode or inhibit treatment. A single laboratory sample is useful, but variable production requires a range and a description of how the wastewater is generated.
Define the destination of every stream
State the required quality for reuse or discharge, the target recovery rate and the permitted concentrate, sludge or salt disposal route. “Zero liquid discharge” should be translated into a mass balance: what water returns to production, what solids remain, what can be recovered and what still requires disposal.
Where membranes may fit
Ultrafiltration, reverse osmosis, nanofiltration, EDI and high-pressure membrane routes can support separation, polishing and water reuse. Their feasibility depends on pretreatment, osmotic pressure, fouling potential, cleaning strategy and the value of the recovered water. Membrane selection without a pretreatment and concentrate plan leaves the hardest part unanswered.
Where MVR and evaporation may fit
Mechanical vapour recompression and multi-effect evaporation become relevant when concentration, solvent or salt separation, difficult high-COD streams or further volume reduction is required. The comparison should include boiling-point elevation, heat-sensitive materials, scaling, corrosion, foaming, cleaning, turndown and available electrical or steam conditions.
Ask for the operating model
Capital cost is only one part of the decision. Request expected energy and chemical consumption, membrane or consumable life assumptions, cleaning frequency, operator attention, planned downtime, remote monitoring, spare parts and the procedure when feed quality moves outside the design envelope.
Plan around the existing site
Brownfield projects need a shutdown window, temporary treatment plan, tie-in points, access route, lifting plan, electrical load, drainage, hazardous-area assessment and a clear division between local civil work and equipment-supplier responsibility. Skid-mounted systems can reduce site work, but they do not remove interface engineering.
What to send for an initial route
A recent water analysis, average and peak flow, process origin, target discharge or reuse quality, current treatment steps, available energy and a site layout are enough to begin. SINOVALINK can organise relevant water, membrane, evaporation and delivery capability around that boundary before a detailed proposal is requested.