Neutralisation Process Design for Electroplating Industry Wastewater Containing Chromium and Cyanides

Abstract

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.

Energy-Saving Paints and Varnishes and Coatings for Agricultural Machinery

“…The use of powder technology for painting agricultural machinery meets the requirements of environmental safety of production, can significantly reduce production areas for painting due to a single-layer application, provides a high-quality durable paintwork with high wear resistance and resistance to aggressive environments [7][8][9][10]. This technology is especially suitable for the coloring of tillage and livestock equipment, as well as equipment for the production of feed.…”

Design Algorithm for the Development of a Technological System Applying Paint and Varnish Coatings for Low-Tonnage Chemicals

“…Energy resources and environmental requirements, as external resources in the organization of the process, are used as constraints, but they are necessarily included in this system. As restrictions are used such factors as: the location of production, cleaning or processing of raw materials, as well as available to the enterprise energy capacity [9].…”

Logical-Information Subsystem of the Expert System for the Design of Multi-Assortment Low-Tonnage Paint and Varnish Industries

“…The search for the optimal route for solving the problem of optimizing the chemical-technological system for the production of paints and varnishes is carried out in the form of a multipurpose procedure. First, the optimal types of technological equipment are selected for each stage of the technological process for obtaining target or intermediate products [4][5][6][7]. Structural and functional elements act as information signs of standard technological equipment.…”