Abstract: A bidet for a toilet for enabling a toilet to be also used as a bidet. The bidet includes a mounting member securable to a base of a standard toilet through existing apertures used for securement of a toilet seat. A mixing valve is secured to an underside of the mounting member. The mixing valve having a pair of supply lines extending outwardly therefrom for coupling with existing hot and cold water lines. The mixing valve has a water outlet line extending outwardly thereof. The water outlet line extends along the mounting member and having a free end secured to a topside of the mounting member. A control handle is secured to the topside of the mounting member and extending into communication with the mixing valve to control the dispensing of water outwardly of the water outlet line. A spray head is positionable interiorly of the standard toilet. The spray head has a supply line extending outwardly therefrom. The supply line couples with the free end of the water outlet line of the mixing valve.

Abstract: The invention relates to a new method of reducing the organic substance content of alum earth production cycle performed according to the Bayer technology. By the method of the invention the majority of the organic substances present in the circulating lye can be removed easily and with only slight losses in sodium content.According to the invention one proceeds so that soda present in the hydrate wash and/or in the soda salt solution is caustified with lime, the solution is evaporated to reach a total sodium oxide concentration of 200 to 400 g/l, the precipitated solid is separated and removed from the system, and the liquid is recycled.