PROCESS RECOVERY AND RECLAIM

There are many treatment alternatives available for the recycle and reclaim of processes solutions. Filtration can be used to recovery process solution and concentrate up others. Electrowinning can be implanted to plate out metals from ion exchange regeneration or plating baths. Selective ion exchange is a process where weekly ionized cations (heavy metals) are exchanged and assist in meeting discharge compliance. Furthermore LT Technologies offer points of use treatment systems for the recycle of rinse water and reclaim of containments from process applications such as cleaning and plating applications.

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RECLAIMING ACIDS, METALS AND WATER

Even with the wide array of treatment options, it is difficult to balance treatment efficiency with resource recovery and regulatory compliance. One proven technology achieves that balance – nanofiltration treatment using spiral wound membranes.

Low pH wastewater: Nanofiltration technology will permeate acids, and bases while retaining metals and returning up to 90% of the process water free of multi-divalent metals. Due to reduced stream volume, caustic and coagulant usage is reduced treating the concentrate.

Metal finishing: Nanofiltration can help close the loop in metal finishing operations by separating soluble metals from acid. Treated acid and process water may be returned to rinse or plating baths while heavy metals are recovered.

Acid recovery and reuse: Nanofiltration and reverse osmosis membranes may be used in tandem to treat metal-contaminated acid streams. Nanofiltration clarifies the acid while concentrating the heavy metal stream for efficient recovery. Reverse Osmosis concentrates dilute acid streams and returns clean water for reuse.

Large volume waste streams: Nanofiltration improves evaporative processes by concentrating feed streams and vastly improving evaporator efficiency. Similarly, nanofiltration improves crystallizer efficiency by increasing solids concentration. In both cases, the permeate may be discharged, reused in the process or polished with reverse osmosis for water recycling capabilities.

LT Technologies has case studies to illustrate how nanofiltration, alone or in combination with other technologies, achieves the goals for improving treatment efficiency, regulatory compliance and recovery of valuable resources. For help resolving your facility’s process or waste treatment issues, contact L & T Technologies. Pilot plant studies are also available.

Through LT Technologies’ 3-tier of success (consultation, capital equipment manufacturing and high-end services) we can develop a treatment strategy to meet the upcoming need for more stringent effluent discharge limits.

CASE HISTORIES

 Process Solution and Rinse Recovery Systems