How to treat industrial sewage?

January 08, 2024

First, industrial sewage introduction:

In recent years, industry has developed very rapidly. Although it has effectively promoted economic development, the surrounding environment has been greatly affected due to the problems of sewage treatment methods in many industrial enterprises. At present, we attach great importance to environmental protection and increase the management of sewage treatment in industrial enterprises. Industrial enterprises should not only have efficient sewage treatment methods, but also pay attention to the recycling of sewage to protect the environment and improve the utilization rate of water resources.

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Second, industrial sewage treatment methods:

1, anaerobic biological treatment technology

Anaerobic biological treatment technology is commonly used in industrial wastewater treatment. It has the characteristics of simple operation. With the development of science and technology, there are more and more types of anaerobic reactors, and the application range is more and more wide. At present, the second and third generation anaerobic processors are mainly used in industrial enterprises. For example, granular bioreactors, such as upstream sludge beds, when the reactor is used, the sewage and sludge are mainly mixed by the gas produced by the reactor, and then the granular sludge is separated by a three-phase separator, and the gas and treated sewage are discharged to the reactor. With the continuous development of science and technology, relevant institutions have designed a new type of reactor, similar to the traditional structure, but the ratio of height to diameter has increased, and the rising speed has been accelerated, thus improving the quality of industrial sewage treatment.

2, aerobic biological treatment technology

Aerobic biological treatment technology has been used in industry for a long time. Now the relevant technicians continue to improve the aerobic biological treatment technology and technical details, so as to greatly improve the sewage treatment effect. The aerobic biological treatment technology is mainly composed of HCR process, which realizes the reasonable combination of high-speed jet aeration and turbulent shear technology, and can effectively remove the sludge in industrial sewage. In the existing aerobic biological treatment unit, the conversion rate of oxygen in the unit is greatly increased, and the reaction space in the unit is effectively increased. Aerobic biological treatment technology effectively improves the conversion and utilization efficiency of oxygen in the device, has a high load value, can effectively improve the metabolic rate of microorganisms in industrial sewage, increase the internal consumption of aerobic biological treatment equipment, and effectively reduce the sludge content in industrial sewage, which is favored by the sewage treatment department of large industrial enterprises.

3, ion exchange resin treatment technology

Ion exchange resin is a new technology for industrial wastewater treatment. Using the properties of ion-exchange group polymers, heavy metals such as mercury and copper in industrial wastewater can be treated. Ion exchange resin is insoluble in acidic or alkaline solution and belongs to polymer porous solid polymer. Ion exchange resin technology can be used to filter and treat heavy metal wastewater with low concentration and large discharge in industrial wastewater. When this technology is used, it can also be operated with sodium sulfide, which can ensure that the quality of industrial wastewater meets the discharge standards in the secondary treatment. The use of ion exchange resin technology has a certain pertinence, while having several characteristics, so the chemical treatment method can be the basic standard of wastewater discharge. At the same time, it can achieve closed cycle, efficient and stable operation, and the discharged sewage can be recycled as cooling water, which is in line with the concept of sustainable development.

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4, reverse osmosis sewage treatment technology

Reverse osmosis water treatment technology was proposed for commercial operation from 1953 to the 1960s, and has been widely and successfully applied in various fields.

Membrane separation technology is a new separation, purification and concentration technology. Compared with the traditional separation technology, it has the characteristics of low energy consumption, high efficiency, simple and low cost, and forms a new sewage treatment method. Including microfiltration (MF), ultrafiltration (UF), dialysis (D), electrodialysis (ED), nanofiltration (NF) and reverse osmosis (RO) and other methods. Reverse osmosis technology has the characteristics of no phase change module, simple process, convenient operation, small scale, low cost and low energy consumption. In large industrial cities, the reuse of municipal sewage treatment is the future development direction. Alternatively, municipal sewage after deep treatment can be used as a source of water for cleaning large buildings and homes, irrigation and greening, or "reclaimed water".

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