The EPSE™ Method provides a unique and patented solution for the treatment of materials containing soluble metals. The method produces a metal-free overflow and an insoluble multi-metal precipitate. The EPSE™ Method suits particularly well acidic wastewater containing soluble heavy metals such as copper, chromium and arsenic*.

Introduction to EPSE Lab 

Key Advantages

  • Simple, fast, cost-effective
  • The multimetal precipitate created as an end result is insoluble and exploitable
  • Works on all metals* with a single round of treatment
  • The effectiveness is not dependent on metal concentrations
  • Functions in low temperatures and is not dependent on temperatures
  • Does not require large-scale investments in equipment and can often be directly integrated into existing equipment

*All metals treatable with the EPSE Method marked red in the table at the bottom of the page.

From an environmental point of view, the EPSE™ Method is revolutionary, as it creates a metal-free overflow and an insoluble multi-metal precipitate, often unlike previous treatment methods. EPSE offers its customer a comprehensive technical solution with excellent results, with a one-step cleaning process. The EPSE™ Method can be applied to continuous run or to a batch process.


The EPSE precipitation technique is simple, fast and cost-effective. The process is based on the dosing of the EPSE chemical and the adjustment of the pH level. Its operating costs are low and its implementation does not typically require big investments.

The precipitate generated in the EPSE™ Method is insoluble, whereas, in the most traditional methods, the precipitate remains soluble. In the EPSE™ Method, the water purified of metals and the resulting insoluble precipitate can be classified as inert waste, which does not require special storage or special permits like hazardous waste does.

The EPSE technology works on all metals with a single round of treatment. Many of the methods which have been used so far are selective, which is also why they require several rounds of treatment in a multimetal environment. While alkali metals and, partially, alkaline earth metals are not directly precipitated with the EPSE™ Method, their concentrations can be lowered (as chemical complexes) in the same treatment, if necessary.


The EPSE™ Method is effective despite metal concentrations. Current methods make the removal of especially those concentrations which are already small very difficult. The EPSE™ Method has been confirmed to work in both industrial wastewater and mining wastewater, with both high and very low metal concentrations.

The EPSE™ Method is effective starting from low temperatures. This might result in a cost advantage compared to methods previously used, because treatment doesn’t require extra heating.

The precipitate formed in the process settles rapidly. The insoluble precipitate formed in the EPSE™ Method can be used as a raw material in a number of ways. The most profitable way to use it is to recover critical metals, and some research concerning the metal extracting has already been conducted with promising results.

See our Mobile EPSE™ unit which can be used for proof of concept demonstrations. With the Mobile EPSE™ a tailor made solution for each customer can be showcased.


Metals that can successfully be treated with the EPSE™ Method


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