Purification of waste water from glues, soaps and detergents

Russia: ERG - Henkel ERA

ERG organises a service-oriented supply of a modernised process for the purification of wastewater from glue, soaps and detergents production at Henkel-ERA facilities. By this, a significant reduction of the consumption of reactants required for efficient water purification (iron chloride - by about 50%, sodium hydroxide and standard filter packs - by 10-15%) is obtained relating to the earlier applied technology with the whole services (process transfer and modernization, equipment and chemicals supply) according to the final outcome (purified water amount) instead of selling reactants. In addition to economic advantages, the approach also provides a significant ecological benefit since in addition to wastewater purification to the level appropriate for discharge into the environment, the services supplied by ERG include safe transportation and disposal of the residual solid wastes yielded at the purification process thus completely protecting the environment from pollution relating to this process. Presently ERG and Henkel-ERA have completed the equipment modernisation and the process up-scaling/testing activities and confirmed both the process efficiency and applicability of ChL based business relations.

Purification of wastewaters containing galvanic and organic contaminants

Russia: ERG - Krasny Bor

The project relates to the purification of wastewaters containing galvanic and organic contaminants from various industrial enterprises in St. Petersburg collected at Krasny Bor for disposal. Presently these wastewaters are permanently stored in natural landfill reservoirs causing a danger for the environment in view of the possible overfilling with rainwater or penetration into the groundwater. The process developed by ERG involves the following steps: (1) biological treatment with active sludge for the elimination of a significant part of organic contaminants, (2) precipitation with CaCl₂, FeCl₃, Al₂(SO₄)3 for the removal of organic anions, (3) Fenton process based on oxidation with Fe(II) ions catalyzed by hydrogen peroxide, (4) sorption on active carbon and (5) selective ion exchange. This approach affords an efficient purification of wastewater to the level appropriate for discharge into the environment according to the ecological legislation and sanitary standards. Furthermore, ERG suggests to Krasny Bor a package of services including the supply of chemicals and equipment required for wastewater purification, know how providing the optimisation of the chemicals consumption, training of Krasny Bor personnel to performing the relating operations and services on the residual solid wastes transportation and disposal.

Current Status (July 2006)

An agreement has been signed to implement Chemical Leasing for a pilot plant (treatment of highly contaminated waste water). This project is supported by local authorities with a total of US$ 38.000.- and very promising in several aspects.