Journal: Volume 21, No. 4, 2016
Pages: 114 – 121
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Recuperation of bound nitrogen by processing into hydrazine sulfate in industrial wastewater

Ivanna Demchuk, Hennadiy Stolyarenko, Natalia Tupytska

Abstract

The work is aimed to reduce nitrogen-containing wastewaters of chemical plants by their utilization as secondary raw material. The possibility to utilize contaminated water as secondary raw material not only reduces the value of production, but also saves water resources. The objective of this project is to develop the method of recuperation of ammonia and urea as the main constituents of nitrogen-containing wastewater in mineral fertilizers manufacturing. In general, nitrogen-containing wastewater with ammonia concentration of 3–10 % and urea concentration of 1–5 % is desorbed and hydrolyzed. Desorption and hydrolysis are energy-intensive processes, as they are carried out at high temperatures and excessive pressure. The majority of wastewater after desorption and hydrolysis with urea mass concentration of max.300 mg/dm3 and ammonia mass concentration of max.100 mg/dm3 goes to advanced treatment at nitri-denitrification installations. Nitridenitrification installations also require significant investments. Therefore the recuperation of wastewater is still important and the possibility of recuperation and reutilization of nitrogen-containing compounds might become a new phase of recovery technologies. The synthesis of hydrazine as intermediate material in the production of hydrazine sulfate out a mixture of ammonia and urea has not been considered until now

Keywords

азотовмісні стічні води, аміак, карбамід, гідразин, гідразин сульфат, утилізація, синтез, дослідження

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Suggested citation

Demchuk, I., Stolyarenko, H., & Tupytska, N. (2016). Recuperation of bound nitrogen by processing into hydrazine sulfate in industrial wastewater. Bulletin of Cherkasy State Technological University, 21(4), 114-121.