Sewage treatment method

Abstract

The invention relates to a sewage treatment method, in particular to an urban sewage and industrial sewage treatment method. The sewage treatment method is characterized by comprising the following steps of: treating raw sewage by a lifting pump station; removing particle sands and impurities in the sewage by a grid; treating the sewage by an electrolytic bath; adding a purifying agent; mixing the obtained sewage into a distribution well by a mixer; filling the sewage into a primary sedimentation tank to purify and precipitate and increasing dissolved oxygen in the treated sewage by a plunge pool; then adding the purifying agent and mixing the sewage into the distribution well by the mixer; filling the obtained sewage into a secondary sedimentation tank to carry out secondary sedimentation and purification treatment and filling the effluent obtained after secondary treatment into the plunge pool to increase the dissolved oxygen; filtering the sewage by a sand filter and filling the obtained sewage into a pipeline; and sterilizing the sewage. The sewage treatment method has a simple and convenient process, small occupied area and low civil engineering investment cost, can completely remove organisms and has a good purifying effect. A good foundation is provided for treating the water environment and saving water resources.

Description

technical field [0001] The invention relates to a sewage treatment method, more specifically to a method for urban domestic sewage and industrial sewage treatment. Background technique [0002] At present, my country's water resources are relatively scarce. One of the reasons for this is the continuous exploitation of groundwater, which leads to a continuous decline in water levels. In order to solve the problem of such water shortage, people take different measures. The recycling and reuse of water resources is a very promising business. It can alleviate the shortage of water resources. The recycling of water resources is the deep purification of domestic sewage and industrial sewage to achieve a certain water quality. Requirements, the treated effluent can be used for irrigation, flushing, landscape industrial circulating water and other water use, which can save a lot of tap water. Now we use the following two sewage treatment processes, the first one is the primary tre...

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Problems solved by technology

There is a problem of substandard emissions for future environmental requirements

The second treatment process: secondary treatment process. In my country, the biologically activated sludge treatment method is mainly used. This treatment process mainly uses the bacteria in the biologically activated sludge to degrade the organic matter content by the steam explosion method to achieve the purpose of treatment. However, the site of the secondary treatment process is large, the capital construction cost is high, the operation cost is high, the removal effect of total nitrogen and total phosphorus is poor, and it cannot meet the higher purification requirements of daily water quality