Energy-saving and efficient municipal sewage treatment plant construction method

Abstract

An energy-saving and efficient municipal sewage treatment plant construction method comprises following steps: a, a site is leveled, and a pretreatment section, a secondary biological treatment section, an advanced treatment section, a disinfection section and a sludge treatment section are sequentially constructed; b, constructing a pretreatment section, which comprises a coarse screen, a liftingpump station, a fine screen, an aerated grit chamber, a fine screen, and a primary sedimentation tank; c, constructing a secondary biological treatment section, which comprises an oxidation ditch anda secondary sedimentation tank; the outer pool wall adopts a reinforced concrete structure, and the inner partition adopts a brick wall shear wall structure; d, constructing an advanced treatment section, which comprises a high-density sedimentation tank, a midway lifting pump station and a denitrification active sand filter tank; e, constructing a disinfection section, which comprises a contactdisinfection tank and an effluent discharge open channel; f, constructing a sludge treatment section, which comprises a sludge thickening tank, a sludge dehydrating room and a sludge outward transportation field; g, the raw sewage enters the pretreatment section; the treated sewage enters the secondary biological treatment section, the advanced treatment section; and the disinfection section in sequence, and finally sewage is disinfected and then discharged.

Description

technical field [0001] The invention relates to a method for constructing an energy-saving and high-efficiency municipal sewage treatment plant. Background technique [0002] Due to urban construction and industrial park construction, urban sewage discharge and industrial sewage discharge have become the main sources of environmental pollution, and the pollution of their water quality will directly endanger the health of residents along the water flow. Moreover, the harm of its water pollution to surface water cannot be underestimated. The construction of sewage treatment plants for urban sewage treatment and industrial sewage treatment has correspondingly solved the water quality problem of sewage discharged into the natural environment. [0003] The main technological process of the existing sewage treatment plant includes a pretreatment section, a secondary biological treatment section and a sludge treatment section. The pretreatment section usually includes coarse and ...

AI Technical Summary

Problems solved by technology

[0004] However, the construction of the existing sewage treatment plant directly leads to low sewage treatment capacity in its technological process, especially in the secondary biological treatment section, the reaction process between microorganisms and sewage is too slow, and it is necessary to add multiple agitators to make the sewage in the sludge Microorganisms are fully integrated with sewage to improve their microbial activity, thereby speeding up sewage treatment

However, this will directly lead to an increase in construction costs, usage costs and operating costs, and will also directly lead to an increase in energy consumption

For example, expanding the secondary biological treatment section can increase the sewage treatment capacity, but it will lead to many problems such as excessive land occupation, difficulty in site selection, and further increase in construction costs.

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