Technology development and testing for sustainable water management and additive raw material extraction at the pilot location Zinnerzgrube Ehrenfriedersdorf

The objective of the TERZINN joint research project consists in the further development and on-site testing of processes for cleaning the water emerging from the Ehrenfriedersdorf tin ore mine, in particular with regard to arsenic. The aim is to ensure that there will be hardly any negative environmental impact in future, in order to make a contribution to the economic and social development of the region. In particular, it should also be demonstrated that the effects of mining on water quality can be avoided at reasonable costs by means of the most modern water treatment methods and an intelligent water management system, even for critical pollutants such as arsenic.

The main goals of the joint research project are the further development of efficient active and passive process approaches for the separation/fixation of pollutants as well as for the extraction of raw materials, the testing of a chemical in-situ immobilization of arsenic as well as further evaluation of the chemical stability of the immobilized material. Furthermore, extensive hydro-chemical monitoring is planned, on the basis of which systems for automated in-situ monitoring of the arsenic concentration in mine water and an AI-based control of the water treatment modules are to be developed. The technical objective is to adapt the procedures at the demonstrator level to the local conditions in such a way that a depletion of arsenic and other water pollutants can be achieved by up to 90%.

Project Overview

  • Time span
    est. from 01.04.2021
  • Pseudonym
  • Project type
    Sustainable water management

R & D Locations

Reusable Materials
Residual Materials


Fraunhofer Institute for Ceramic Technologies and Systems (IKTS)

Hans – Jürgen Friedrich

Phone: +49 351 88815-720

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Helmholtz Institute Freiberg for Resource Technology (HIF) will celebrate its birthday together with Saxonian Minister President Michael Kretschmer and interested guests on September 9, 2021. The number 10 plays an important role for both the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the Helmholtz Institute Freiberg for Resource Technology (HIF). In addition to the 10-year affiliation of the HZDR with the Helmholtz Association, the HIF looks back on 10 very successful years at the research location of Freiberg. Furthermore, the HIF inaugurates its new metallurgy pilot plant on September 9, 2021. The inauguration marks another milestone in the development of a unique campus for resource technology and progresses sustainability steadily at HIF. The HIF will celebrate this progress and cordially invites you!

The new metallurgy pilot plant at HIF. ©HZDR/599Media

Can the recycling of mining waste become a new business? That was the main question addressed in the Lunch Event & Debate organised by the Horizon2020 NEMO project on April 27, 2021.

Video link: https://www.youtube.com/watch?v=5gKXbOik3dc

You can find more information on the website of the project Nemo (https://h2020-nemo.eu/2021/03/11/recycling-mining-waste-a-new-business-april-27-2021/).

Eight partner from science and industry participate in the research project “TerZinn – Technologieentwicklung und Erprobung für nachhaltiges Wassermanagement und additive Rohstoffgewinnung am Modellstandort Zinnerzgrube Ehrenfrieders-dorf“: Zinnerz Ehrenfriedersdorf GmbH, G.E.O.S. Ingenieurgesellschaft mbH, Wis-mut GmbH, BIT Tiefbauplanung GmbH, ibes AG, Kurt-Schwabe-Institut für Mess- und Sensortechnik Meinsberg e.V., TU Bergakademie Freiberg and the Fraunhofer Institute for Ceramic Technologies and Systems IKTS. The Federal Ministry of Edu-cation and Research (BMBF) funds the project with around one million euros. TER-ZINN belongs to the alliance “recomine – rethinking resources”, which works on the subject of mining waste at the intersection of environmental technology, resource technology and digitalization.

Complete press release:

On 18th of February 2021 the recomine-project TERZinn starts as the first of currently eight selected projects of the first recomine-call. Over the next three years, a digital underground measurement system will be developed and tested in the historic Ehrenfriedersdorf mine site. Newly developed sensors will record current information from the incoming mine water and pass it on to a modular water treatment system, which will then decide how heavily the water needs to be treated depending on the water contamination (e.g. with Arsenic). The system will then be further developed for use in the Ore Mountains and around the world, and will sustainably improve water quality in many mining regions.