DOI: https://doi.org/10.32347/2524-0021.2019.32.15-23

Cleaning of waste water from chrome compounds with organization of reverse water supply of enterprises

Dmitrо Pakhomov, Gennady Kochetov, Bogdan Yemchura

Анотація


Wastewater from galvanic industries is a dangerous man-made pollutant in the environment. Therefore, the development of modern society requires the use of effective resource-saving technologies for their cleaning in order to preserve the environment. Particular attention is currently being paid to the integrated treatment of industrial wastewater from highly toxic chromium compounds in modern industrial plants. Wastewater treatment of the chromium plating line was investigated by ferritization method, which provides both the proper degree of their purification and the subsequent utilization of the water purification waste. An experimental ferrite reactor has been developed. The influence on the process of complex wastewater treatment by the method of ferritization of one of the main factors that determines the course of the process - the ratio of the initial concentrations of chromium and ferric ions. It was shown that the ferrite purified water containing 50 mg/l of chromium compounds has a high degree of purification of water from heavy metal compounds (> 99.5%) and meets the requirements of reuse in production. Investigation of the phase composition of sediments of water purification by radiographic method. It is shown that practically insoluble and chemically stable sediment has a crystalline structure and ferromagnetic properties at the Fe/Cr ratio in the range 8:1 – 15:1. Such waste water treatment is acceptable for disposal, which avoids the loss of valuable and at the same time toxic metal – chromium. The development of sewage treatment prevents pollution of the environment, ensures efficient and rational use of raw materials in the galvanic production system.

Ключові слова


ferritization; circulating water supply; chromium compounds; sediment

Повний текст:

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Посилання


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