Abstract: In a regenerating ion exchanger installation with a resin container, the water, acid and/or alkaline solution pipe conduits inlets lead into a common pump inlet conduit, whereby each inlet can be individually decoupled from the inlet conduit of the pump by means of a specially controllable cut-off valve. The pump is a compressed air-diaphragm pump and feeds directly into a fluid conduit ending at either the upper or the lower side of the resin container and exhibits a counting device for stroke counting, whereby a control device is provided connected to the counting device for the control of the volume flow of water out of the water inlet and acid or alkaline solution out of the acid or alkaline solution inlet via the controllable cut-off valves based on the corresponding stroke count of the compressed air-diaphragm pump.

Abstract: In a retardation installation having a container holding the adsorber material capable of accepting acid, in particular adsorber resin, and a feed for a watery acid-salt-solution, for example from an anodizing bath, a further feed for a regenerating solution to regenerate the adsorber material, in particular demineralized Water in opposite flow to the acid-salt-solution, as well as a drain for the treated acid-salt-solution which has passed the adsorber material and with at least one pump for the transport of the acid salt solution and/or the regenerating solution, precisely one pump is provided for which is configured as a compressed air-diaphragm pump and which exhibits a device for stroke counting as well as a device for the control of the volume flow of acid-salt-solution or regenerating solution on the a basis of the stroke count of the compressed air-diaphragm pump.

Abstract: A device is provided for separating oil and fat from a liquid mixture. The device includes a tank divided by a baffle plate into two separate compartments which leaves an opening between the compartments, a baffle disposed at the bottom of the tank for preventing migration of settled solids between compartments and an immersion type recirculation pump that sucks liquid out of one compartment and forces through a filtration device projecting into the tank that contains tubular ceramic membranes.

Abstract: A process and apparatus for the purification of industrial waste water containing solid particles. The apparatus contains at least two treatment sections. The first treatment section is a settling tank containing an agitation means, preferably an inclined deflector plate against which the waste water is directed to form a rolling wave and causing solid particles to coagulate and settle. The partially cleaned waste water overflow from the first stage is conveyed to the lower portions of the second stage into spaces between inclined plates which form an inclined plate pack clarifier. The solid particles are taken off from the bottom of the second treatment section, and clarified water is taken off from the top.