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Zero Discharge Of Wastewater In The Steel Industry Requires Finding Methods

Release time: 2024-09-22

Zero discharge of wastewater generally refers to the phenomenon of industrial wastewater being recycled and reused after treatment, and ultimately not producing waste liquid discharge. On the one hand, the utilization rate of resources has been higher, and on the other hand, environmental pollution has been reduced. In some industrial fields, high water consumption is an established fact, therefore, promoting zero discharge of wastewater has naturally become an important environmental direction in these fields.

Several national policies have also clarified the need to accelerate the comprehensive utilization of industrial resources and promote the recycling of industrial wastewater. The policy is clear, and the reuse rate of industrial water for industries above designated size such as steel, petrochemical and chemical industries, and non-ferrous metals must reach 94% or above. By 2025, a new pattern of efficient recycling and utilization of wastewater in major water consuming industries will be basically formed.

The operation of the steel industry cannot do without the significant consumption of water resources, and the volume of wastewater discharge is also large. The combination of zero wastewater discharge and the steel industry is an inevitable trend for green development. It should be recognized that zero discharge of wastewater and the steel industry are currently in a "fitting in period", and more emphasis is placed on gradual progress. I can't eat hot tofu in a hurry, that's the same reason.

Experts who have been deeply involved in the field of wastewater resource utilization in the steel industry for many years have pointed out that the current focus of the steel industry should be on the treatment of concentrated brine at the end of the entire plant level water cycle, and should not excessively pursue "zero discharge of wastewater". It should be done according to capacity and depending on the situation.

In the gap between ideal and reality, zero discharge of wastewater can truly achieve a perfect combination of pollution reduction and higher resource utilization. The difficulty exists, and it still needs to pass the test of time. At present, wastewater may be transformed into resource products that can be reused after deep treatment, but it may also generate some concentrated brine that cannot be absorbed, or there may be a series of practical problems such as high operating costs and difficulty in system maintenance.

The "Implementation Plan for Industrial Wastewater Recycling and Utilization" released by the department proposes that by 2025, the industrial water reuse rate in the steel industry should be higher than 97%. Indeed, policies have high requirements for water resource utilization efficiency in the steel industry. But it should also be noted that there are many feasible solutions for green transformation in the steel industry that can be connected to the track of zero wastewater discharge.

Industry insiders believe that the steel industry should gradually develop from internal water circulation to regional water circulation systems. Enable water circulation in different units such as enterprises and communities, establish a closed-loop water resource utilization system, implement a wider range of water resource recycling, and assist the steel industry in improving water resource utilization efficiency, in order to form a new pattern of water resource recycling in the industry.

The composition of wastewater in the steel industry is complex and may cause various environmental pollution problems. Therefore, it is currently necessary to prioritize and break down the prominent problems in industry wastewater, gradually approaching the path of zero discharge of wastewater.

However, it can be confirmed that with the advancement of zero discharge technology for wastewater, the discharge of water pollutants will continue to approach "zero", and there is still a long way to go to achieve zero discharge of wastewater.