Water conservation approaches in printing and dyeing production processes based on wastewater treatment and graded reuse

ZHOU Lu; XU Kun; QIU Zhaojing

doi:10.16511/j.cnki.qhdxxb.2017.26.018

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (3) : 331-336. DOI: 10.16511/j.cnki.qhdxxb.2017.26.018

ENVIRONMENTAL SCIENCE AND ENGINEERING

Water conservation approaches in printing and dyeing production processes based on wastewater treatment and graded reuse

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Abstract

A water conservation database was developed to improve the wastewater reuse rate in printing and dyeing production for batch production processes having drastic fluctuations in wastewater flowrate and pollutant concentrations. The water conservation data was analyzed using a real-time parallel computations based on the textile company's information collection system. The wastewater quality parameters such as the chemical oxygen demand (COD) and conductivity were monitored during wastewater treatment to evaluate the reuse potential for water resource management. A scheduling and reuse system using the production processes as the analysis object was developed to improve the total wastewater discharge and reuse rates. A typical knit cotton dyeing enterprise was used for a case analysis. The results show that the system reduces water consumption by 38.72% and also reduces the quality fluctuations and wastewater flowrate. This has a positive effect on the operating stability of the water treatment processes.

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textile wastewater / batch production / graded reuse / database / water conservation

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ZHOU Lu, XU Kun, QIU Zhaojing. Water conservation approaches in printing and dyeing production processes based on wastewater treatment and graded reuse[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(3): 331-336 https://doi.org/10.16511/j.cnki.qhdxxb.2017.26.018

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