Set of industrial waste water treatment system

Abstract

The invention provides a set of industrial waste water treatment system which comprises a grating tank, a grit basin, a primary sedimentation tank, a biological rotating disc, a secondary sedimentation tank, a disinfecting tank and a sludge treatment tank, wherein industrial waste water is introduced into the grating tank through a pipeline, and then the treated waste water is introduced into the grit basin through pipeline connection, and the grit basin removes sands or structures composed of other inorganic particles having high specific gravity in waste water by virtue of natural settlement action; waste water treated by the grit basin is introduced into the primary sedimentation tank, the biological rotating disc, the secondary sedimentation tank and the disinfecting tank in sequence through pipeline connection to be subjected to reaction treatment, sludge generated by reaction treatment in the grit basin, the primary sedimentation tank, the biological rotating disc and the secondary sedimentation tank is discharged into the sludge treatment tank to be subjected to reaction treatment, and water after reaction treatment in the disinfecting tank is discharged out or recycled. According to the invention, a biological rotating disc treatment process is adopted, the biological rotating disc is composed of a water tank and a rotating disc body which is partially soaked into the waste water, a microbial membrane growing on the surface of the disc body repeatedly contacts with waste water in the tank and oxygen in air so as to purify the waste water.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a set of industrial wastewater treatment systems. Background technique [0002] With the rapid development of industry, the types and quantities of waste water have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. Because the composition of industrial wastewater is more complex and some are toxic, industrial wastewater treatment is more difficult and more important than urban wastewater treatment. [0003] High-concentration organic wastewater mainly has the following characteristics: First, the concentration of organic matter is high. COD is generally above 2000mg / L, and some are even as high as tens of thousands or even hundreds of thousands of mg / L. Relatively speaking, BOD is low, and the ratio of BOD to COD in many wastewaters is less than 0.3. The second is complex composition. The organics ...

AI Technical Summary

Problems solved by technology

Second, the composition is complex

Third, high chroma and peculiar smell

The first is aerobic hazards: due to biodegradation, high-concentration organic wastewater will make the receiving water body anoxic or even anaerobic, and most aquatic organisms will die, resulting in stench, deteriorating water quality and environment

The second is sensory pollution: high-concentration organic wastewater not only makes the water lose its use value, but also seriously affects the normal life of people near the water

The third is toxicity hazards: ultra-high concentration organic wastewater contains a large amount of toxic organic substances, which will continue to accumulate and store in natural environments such as water bodies and soils, and finally enter the human body, endangering human health

[0005] Analysis of the reasons why high-concentration refractory organic wastewater is difficult to treat biologically: The reason why high-concentration refractory organic wastewater is difficult to treat biologically is essentially determined by its characteristics, except for the external environmental conditions during treatment (such as temperature, pH, etc.) In addition to not reaching the optimal conditions for biological treatment, there are two important reasons. One is that due to the chemical composition and structure of the compound itself, in the microbial community, there is no enzyme for the compound to be treated, making it resistant to degradation; The second is that the wastewater contains substances (organic or inorganic) that are toxic to microorganisms or can inhibit the growth of microorganisms, so that the organic substances cannot be degraded quickly

Images