Sewage treatment method

Abstract

The invention discloses a sewage treatment method, comprising the following steps of: step 1, preparing an agent for performing sewage purification treatment according to the properties of sewage; step 2, pumping the agent to a reaction pool according to a dosage by using a metering pump while enabling sewage to flow in the reaction pool according to the flow of the sewage, and performing purification reaction on the agent and the sewage, and performing stirring, coagulating and precipitating to generate a supernatant and sludge; step 3, press-filtering the sludge via a press filter to obtain press filtrate and dry sludge, collecting the dry sludge and then treating the dry sludge separately; step 4, combining the supernatant with the press filtrate and pumping to a biochemical pool, performing biodegradation, and precipitating to obtain clarified solution and active sludge; and step 5, mechanically filtering the clarified solution obtained in the step 4, pumping the filtrate to a reservoir which is detected to be qualified, and conveying the filtrate in a water recycling system. The sewage treatment method disclosed by the invention is used for automatically performing purification treatment on enterprise sewage, and repeatedly using the reclaimed water, thus reducing the waste of freshwater resource and lowering enterprise production cost.

Description

technical field [0001] The invention belongs to the field of sewage purification, in particular to a sewage treatment method. Background technique [0002] my country is a water-scarce country with low fresh water reserves, accounting for only 6% of the global water volume. Because it is a populous country, the per capita water volume is only 1 / 4 of the world's average water volume, and the distribution of water resources is seriously uneven, especially in the central and western regions. Perennial drought, water shortage, although the coastal areas are rich in water resources, but fresh water resources are still lacking relative to the population environment; with the development of industrial technology and the acceleration of urbanization, the discharge of a large amount of industrial sewage and domestic sewage has caused serious damage to water resources. Adverse effects have exacerbated the shortage of fresh water resources. [0003] Many places have spent huge sums of m...

AI Technical Summary

Problems solved by technology

[0002] my country is a water-scarce country with low fresh water reserves, accounting for only 6% of the global water volume. Because it is a populous country, the per capita water volume is only 1 / 4 of the world's average water volume, and the distribution of water resources is seriously uneven, especially in the central and western regions. Perennial drought, water shortage, although the coastal areas are rich in water resources, but fresh water resources are still lacking relative to the population environment; with the development of industrial technology and the acceleration of urbanization, the discharge of a large amount of industrial sewage and domestic sewage has caused serious damage to water resources. Adverse effects, exacerbating the shortage of fresh water resources

[0003] Many places have spent huge sums of money to build sewage treatment plants, and encourage or require enterprises to concentrate sewage to sewage treatment plants for purification and treatment. All of these have greatly increased the production costs of enterprises. Directly discharged into rivers, seas and lakes, causing waste of fresh water resources