Efficient nitrogen and phosphorus removal method for sewage properties-classified treatment in highway service area

Abstract

The invention discloses an efficient nitrogen and phosphorus removal method for sewage properties-classified treatment in a highway service area. The efficient nitrogen and phosphorus removal method includes that toilet flushing sewage in the highway service area flows into a septic tank to be treated, the sewage in the septic tank sequentially flows through an adjusting tank (1), a nitration tank (1), a settling tank (1), a denitrification tank (1), a denitrification tank (2), a nitration tank (2) and a settling tank (2), and when effluent in the settling tank (2) reaches the standard, the effluent is discharged; simultaneously, catering sewage flows into an oil separation tank to be treated, and the sewage in the oil separation tank flows into an adjusting tank (2); the catering sewage and the toilet flushing sewage share the denitrification tank (1) and the denitrification tank (2), and the treatment method of the catering sewage flowing into the denitrification tank (1) or the denitrification tank (2) is identical to that of the toilet flushing sewage flowing into the denitrification tank (1) or the denitrification tank (2); simultaneously, other sewage flows into the adjusting tank (1) or the adjusting tank (2); if the other sewage flows into the adjusting tank (1), the treatment method of the other sewage flowing into the adjusting tank (1) is identical to that of the toilet flushing sewage flowing into the adjusting tank (1); and if the other sewage flows into the adjusting tank (2), the treatment method of the other sewage flowing into the adjusting tank (2) is identical to that of the catering sewage flowing into the adjusting tank (2).

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for treating sewage in an expressway service area. The method is also suitable for sewage treatment and high-efficiency denitrification and dephosphorization of other catering, tourism, livestock and poultry breeding industries. Background technique [0002] The condition of highway construction reflects the degree of traffic development of a country and region, and even the overall level of economic development. The construction of expressways in China started relatively late. The earliest expressway to be constructed was the Shen-Da Expressway, which was completed in 1990. However, the development of China's expressways is very fast. By the end of 2010, China's expressway mileage reached 74,000 kilometers, ranking second in the world. The rapid development of expressways has also brought corresponding environmental problems. Among them, sewage treatment in ...

AI Technical Summary

Problems solved by technology

However, adding additional carbon sources requires higher chemical costs. For high-nitrogen and phosphorus wastewater in expressway service areas, a large amount of carbon sources is required, which significantly increases the treatment cost.

In addition, adding ecological treatment processes such as constructed wetlands after conventional treatment processes can also increase the removal rate of total nitrogen, but due to the limited nitrogen required for wetland plant growth, the removal ability of TN is not strong, and wetlands require a large area area, not an optimal solution

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