En construction
Kestner has always been very active in the treatment of effluents. Our
experience in this domain covers almost all industrial sectors:
-
Alumina Industry: elimination of the sodium carbonate from the Bayer liquor,
salting-out and liquor-burning high concentration evaporators.
Base
chemicals industries: recovery of salts such as NaCl, Na2SO4, etc … from
organic synthesis, recovery and purification of acidic synthesis effluents such
as HCl, H2SO4.
- Energy: zero discharge evaporative crystallisers for
cooling towers blowdowns.
- Nuclear: concentration of radwastes
effluents
- Environment: concentration to dryness of incinerators
liquid purges, recovery of valuable chemicals from reaction effluents.
- Fertilisers’ production: ammonium nitrate residual condensates
treatment, recovery of HNO3 in effluents, recovery of H2SiF6 from phosphoric
acid concentration units.
- Food industries: citric acid effluents
concentration and up-grading, sulphuric acid concentration from ethanol
production plants, elimination of inorganic chemicals from specific wastes,
food grade phosphoric acid.
- Mines and metallurgy: HCl recovery from
various processes, from pickling liquors with or without recovery of valuable
chemicals, and from non ferrous metallurgical units, HCl or H2SO4 recovery from
pickling liquors, concentration of AlCl3 from metallurgical wastes.
-
Pulp & paper: black liquor concentration before burning, bleaching
effluents concentration and up-grading, stripping of process condensates,
recovery of Na2SO4 from incineration residues.
- Textiles: waste H2SO4
concentration, NaSCN concentration, NaCl and Na2SO4 recovery by
crystallisation.