Drain or sink shaft houses a filter consisting of a textile or fleece material containing one or more different reduction agents with specified normal potentials

摘要

The drain or sink shaft (1) houses a filter (6) consisting of a textile or fleece material containing in and/or on it one or more different reduction agents (11, 12), with the normal potential of at least one reduction agent being less than the normal potential of the metals or metal compounds present in the waste liquid.