Manufacturing processes in the electroplating industry employ hazardous chemicals and generate hazardous waste, including hexavalent chromium compounds and heavy metal cyanides. We designed a reagent-based treatment technology that can remove these contaminants and is relatively simple to implement and maintain. The technology features low reagent consumption but high treatment efficiency and simplifies separating precipitates from the treated effluent. The paper presents a detailed description of how to neutralise electroplating shop wastewater. We propose a system of organizational and technological measures to improve chemical safety.
Metal structures, equipment, ships, port and hydraulic structures, other objects operating in river or sea water, after some time are exposed to the inhabitants of the aquatic environment. The surface is overgrown with algae; various small marine organisms attach to it. Fouling with algae and microorganisms becomes the reason for the intensification of metal corrosion processes in an aggressive aqueous medium, which leads to premature destruction of objects.Bio-fouling creates a number of problems for operation -from reducing the fuel efficiency to losing the design. Only recorded losses from biodeterioration account for 5-7% of the value of world industrial products, and they are gradually growing.
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