These plants neutralize effluents by means of hydrochloric acid and caustic soda to achieve the required discharge pH (usually between 6.5 and 9.0). Process control is automatic and the resulte is monitored at the discharge point.

• University of Hamburg, D
• Univeristy of Tübingen, D
• University of Munich, D
• University of Bonn, D
• Max-Planck-Institut, Jena, D
• Schering AG, Weimar, D
• Bundeswehr, Munster, D