The scale of printing and dyeing wastewater treatment plant of Shihezi Development Zone constructed by Xinjiang Rand Co., Ltd. is 20,000m3 / day. Through physical and chemical treatment, biochemical treatment, flocculation sedimentation softening, ozone catalytic oxidation, desalination by double membrane method, multistage concentration and mechanical compression evaporation Crystallization (MVR) and other advanced technologies to achieve zero emissions, is the first zero-emission printing and dyeing wastewater treatment plant.
Printing and dyeing wastewater has a large amount of water, biodegradability is poor, high salt content, high chroma, water quality fluctuations and so on. The Shihezi area in Xinjiang is one of the earliest cotton textile industries. There is no natural sewage in the area and severe water shortages. Therefore, the textile printing and dyeing industry in Shihezi chose the way of zero discharge of sewage and full water reuse.
In this project, Rand uses a number of independently designed process technologies, including ozone-based catalytic oxidation process technology for highly-salty wastewater, softening desalination technology for highly salty wastewater, and high-power electroforming Package technology, malodorous pollutants biological treatment technology package technology. The resulting water back to the upstream printing and dyeing enterprise process water, the salt generated through the membrane filtration and evaporation crystallization of salt and salt separation, salt as an industrial salt reuse, the resulting sodium sulfate back to the upstream printing and dyeing enterprises.
It is understood that the company now has 51 patents, including petrochemical wastewater treatment and reuse of zero-emission integrated technology, coal chemical wastewater treatment and zero-emission integrated technology, printing and dyeing wastewater reuse and zero-emission integrated technology, high-concentration brine zero discharge Invention patents such as integration technology are patents that have an important influence on the industry. There are 3 state-level key new products and 4 new products in the autonomous region. It undertakes more than 50 national, autonomous region-level and municipal-level science and technology projects. Among them, there are industrialization of integrated technology of petroleum and petrochemical water supply and waste water reuse for national Torch Plan projects, Supporting Projects Coal Chemical Wastewater Treatment and Recycling in Arid Areas, National Science and Technology Huimin Project Yopin Lake Brackish Water Desalination Livelihood Demonstration Project in Kashi Prefecture, Hydrophobic Membrane Manufacturing by NDRC Water Saving Project, and the First State Key Scientific and Technological Textiles Thermal Power Industry Water Resources Efficient recycling and recycling technologies and demonstration projects.
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