Treatment system and method for municipal wastewater

Abstract

The invention discloses a treatment system and method for municipal wastewater. The treatment system comprises a blow-off tank, a primary sedimentation tank, a hydrolysis tank, an anaerobic tank, an aerobic tank, a flocculation sedimentation box, an ozone contact tank and a disinfection tank; and the primary sedimentation tank is connected with the blow-off tank and the hydrolysis tank, the bottomof the blow-off tank is provided with an aeration tube, the anaerobic tank is connected with the hydrolysis tank and the aerobic tank, and the ozone contact tank is connected with the flocculation sedimentation box and the disinfection tank. The method comprises the following steps: (a) primary treatment (b) biological treatment; (c) flocculation treatment; and (d) secondary treatment. The processing system disclosed by the invention is convenient to operate and manage, stable and reliable, has a good treatment effect, effectively removes pollutants and impurities in the wastewater, reduces harm of the wastewater, has a simple process, is easy to control, implemented by stages and step-by-step, reduces treatment costs of the wastewater as much as possible and improve a treatment effect ofthe wastewater.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to an urban wastewater treatment system and method. Background technique [0002] Urban domestic sewage mainly comes from households, businesses and urban public facilities, etc. Organic matter is the main pollutant of domestic sewage, such as: starch, protein, sugar and vegetable oil. The chemical oxygen demand, biological oxygen demand, total nitrogen and total phosphorus of urban domestic sewage are relatively high. When water with high nitrogen and phosphorus content is discharged into the natural world, it will easily cause eutrophication of the water body, causing algae to grow and reproduce in large numbers, and in severe cases, it will cause red tides and algal blooms, which will deteriorate the water quality and pollute the environment. [0003] The usual urban wastewater treatment methods use biochemical methods, but the treatment effect is often unsatisfactory in the actua...

AI Technical Summary

Problems solved by technology

When water with high nitrogen and phosphorus content is discharged into nature, it is easy to cause eutrophication of the water body, causing a large number of algae to grow and multiply, and in severe cases, it will cause red tides and algal blooms, resulting in deterioration of water quality and environmental pollution

[0003] The usual urban wastewater treatment methods use biochemical methods, but the treatment effect is often unsatisfactory in the actual operation process. The main reason is that the pollutant components in the wastewater are complex, the water volume changes greatly, and the additives added in some wastewater treatment processes are not conducive to biological reactions. The growth of bacteria, so it is difficult to make the wastewater meet the reuse or discharge standard by using these methods

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