Wastewater treatment method

Abstract

The invention provides a wastewater treatment method which comprises the steps: wastewater enters biomass enrichment culture equipment after regulated by a regulating tank, is subjected to biomass treatment by using microorganisms, enters an aeration tank set for aeration treatment, and settles in a settling tank; settled sludge in the settling tank reflows to the aeration tank set, the regulating tank and the biomass enrichment culture equipment through a sludge reflowing tube at a reflowing ratio of 0.5-10 times; and an air supply tube supplies air to the aeration tank set and the biomass enrichment culture equipment, wherein the microorganisms are Bacilli. The biomass enrichment culture equipment comprises a polyporic tissue fiber body with volume weight of 0.04-0.08g/cm<3> and voidage of above 90 percent. According to the method provided by the invention, by adapting to the change of processing conditions, such as water quality, water yield, load, temperature and the like the purification treatment of the wastewater in the expectation is successfully realized.

Description

technical field [0001] The invention relates to a wastewater treatment method. Background technique [0002] With the continuous acceleration of urbanization and industrialization, environmental pollution has become increasingly serious, and various wastewater purification methods and technologies have emerged and been applied. However, there are various problems in these wastewater purification methods, especially with the At present, the continuous improvement of discharge standards and the increasing shortage of land and energy have greatly limited the engineering application of these wastewater purification technologies. [0003] The existing wastewater treatment technologies similar to the present invention are traditional biological turntable (biofilm) technology and ordinary activated sludge technology. [0004] Biological turntable sewage treatment technology has been widely used in wastewater purification projects due to its small footprint, compact structure, low ...

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Problems solved by technology

[0006] 2. The temperature and other environmental conditions are strict, and the processing system and construction of the North Project need to be built indoors;

[0007] 3. Limited by the characteristics and treatment efficiency of microbial strains and microbial carrier (membrane), it is only suitable for small-volume wastewater treatment projects;

[0008] 4. The scope of application of wastewater is small, and it cannot purify high-concentration wastewater;

[0009] 5. Restricted by microbial strains and carrier characteristics, the ability to remove phosphorus and nitrogen is poor;

[0010] 6. It is easy to emit malodorous gas during the treatment process, causing secondary pollution

[0011] Ordinary activated sludge technology is limited by the biological strains used, it is difficult to treat high-concentration sewage, especially to remove nitrogen and phosphorus components in wastewater, and it occupies a large area, requires a large amount of civil engineering construction, and a long construction period. High investment, high operating energy consumption, large sludge output, poor system load impact resistance, and system crashes easily when the load changes

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