device for the determination of biochemical oxygen demand and, in particular, the toxicity of effluents.

摘要

The invention relates to an apparatus for determining the biochemical oxygen demand and the toxicity, particularly of waste water, having a reaction container 1 comprising a reaction space 11 for receiving a liquid sample, an electrolyser 2 having electrodes 14, 19, an absorber 6 which can be placed in the reaction container and a control and measured value processing device which can be connected to the electrolyser 2. In order, in particular, to improve such an apparatus in such a way that it is even possible to measure heavily polluted waste water as a routine operation in a constructionally simple manner and with reduced space requirements, the reaction container 1 and the electrolyser 2 form a separable unit. In addition, the electrolyser 2 has a riser tube which opens into the reaction space 1.1 of the reaction container 1. The electrolyser 2 has chambers which are connected in terms of flow and which each have an electrode 14 or 17. The free chamber gas spaces 2.3, 9.1 can be separated from one another by an electrolysis liquid. The electrolyser 2 can be inserted in the reaction container 1 and has a vessel section 2.1 which forms one of the chambers and to which the riser tube 9 which opens into the free reaction space forming the other reaction chamber is connected.