High salt wastewater to achieve "zero discharge" path

Author：

With the rapid development of industrial production, the direct discharge of high-salt wastewater has evolved into an environmental challenge that cannot be ignored. High salt wastewater is mainly from steel, coal chemical industry, petroleum and other large displacement of industrial fields, these industries need to recycle most of the water resources in the production process, but the reuse process will inevitably produce wastewater containing a certain concentration of salt. In order to achieve energy conservation, emission reduction and environmental protection, promoting the "zero discharge" of wastewater has become an important goal of these industries.

In the process of achieving "zero discharge" of wastewater, the effective treatment and resource utilization of salt-containing wastewater has become the key. With the help of advanced treatment technology, high salt components in wastewater can be effectively removed, and useful substances in it can be recovered, and finally achieve "zero discharge" of wastewater.

First, the exploration of high salt wastewater treatment technology

At present, the treatment technology of high salt wastewater mainly includes evaporation crystallization method and membrane separation method.

Evaporative crystallization method
This is a traditional method of wastewater treatment, which removes the water in the wastewater by heating and evaporation, so that the salt is concentrated and crystallized out. This method is suitable for wastewater with high salt content and relatively stable water quality. In the treatment process, chemical agents can be supplemented to optimize the effect of evaporation and crystallization.

Membrane separation
This is a new type of wastewater treatment technology that uses a membrane of a specific material to separate water and salt in wastewater. Membrane separation technology includes reverse osmosis, nanofiltration, ultrafiltration and other methods, and the most suitable membrane technology can be selected according to the characteristics of wastewater. Membrane separation method has the characteristics of high efficiency, energy saving and environmental protection, and is an important direction of wastewater treatment in the future.

Second, the recycling of useful substances in high-salt wastewater

In addition to treating high-salt wastewater, recycling its useful substances is also a key link in achieving "zero discharge". The useful ions such as potassium, calcium, sodium, chlorine and sulfate can be recovered effectively by chemical precipitation and ion exchange. These ions can be further used in the production of fertilizers, building materials, chemical products, etc., to realize the resource utilization of wastewater.

3. Path planning to achieve "zero discharge" of high-salt wastewater

In order to realize the "zero discharge" of high-salt wastewater, the government, enterprises and society need to work together. The following is the specific implementation path:

We will strengthen policy guidance and oversight
The government should introduce relevant policies to encourage enterprises to adopt advanced wastewater treatment technology and equipment, and impose severe penalties on illegal discharges. At the same time, a sound monitoring system has been established to ensure the normal operation of wastewater treatment facilities and discharge standards.

Promote advanced wastewater treatment technology
Enterprises should actively introduce and develop advanced wastewater treatment technology to improve the efficiency and quality of wastewater treatment. At the same time, strengthen technology research and development and personnel training to provide strong technical support for wastewater treatment.

Promote the utilization of resources
In the process of wastewater treatment and recycling, attention should be paid to the recycling of resources. Through scientific methods and technologies, useful substances are extracted and used in production to maximize the utilization of resources.

To sum up, the realization of "zero discharge" of high-salt wastewater requires the joint efforts of the government, enterprises and society. Through scientific methods and technical means, strengthening policy guidance and supervision, promoting advanced wastewater treatment technology, and promoting resource utilization, we can effectively solve the problem of high-salt wastewater pollution to the environment and promote the green and sustainable development of industrial production.

Related Products