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Biological sewage treatment method for enhancing removal of estrogens

A sewage biological treatment, estrogen technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor estrogen removal effect and unstable removal efficiency , to achieve excellent nitrification effect, save power consumption, and improve denitrification efficiency

Inactive Publication Date: 2011-03-16
SOUTHEAST UNIV
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Problems solved by technology

[0004] Technical problem: The purpose of this invention is to solve the problem of poor estrogen removal effect and unstable removal efficiency in existing urban sewage treatment plants based on activated sludge method, and to provide a high-efficiency, low-cost enhanced estrogen removal method Sewage biological treatment method

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Embodiment Construction

[0017] Below, the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0018] The invention relates to a sewage biological treatment method for strengthening estrogen removal. The main structures include an anaerobic pool, an anoxic pool and an aerobic pool, and the three pools can be built together or separately. Divide the sewage in proportion to enter the anaerobic pool, anoxic pool and aerobic pool at the same time. The anoxic pool is divided into three or more water inlet points. The sewage entering the anoxic pool and the nitrification reflux liquid of the aerobic pool are mixed for denitrification, and then enter the aerobic pool for aeration with the sewage directly entering the aerobic pool, and the nitrification mixed liquid in the aerobic pool is refluxed It goes to the anoxic tank for denitrification, the mixed liquid in the aerobic tank undergoes solid-liquid separation in the secondary settling tank, and par...

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Abstract

The invention provides a biological sewage treatment method for enhancing removal of estrogens, which is most suitable for enhancing removal of estrogens in sewage treatment plants with denitrifying and dephosphorizing functions. The method is characterized in that the sewage simultaneously flows into an anaerobic tank, an anoxic tank and an aerobic tank separately in proportion, the anoxic tank is provided with three or more water inlets; the sewage flowing into the anaerobic tank directly undergoes denitrification with the sewage flowing into the anoxic tank and nitrified backflow liquid in the aerobic tank after undergoing anaerobic treatment, then the denitrified product enters into the aerobic tank to directly undergo aeration with the sewage in the aerobic tank, nitrified mixed liquid in the aerobic tank flows back to the anoxic tank to be denitrified, the mixed liquid in the aerobic tank undergoes solid-liquid separation in a secondary sedimentation tank and partial sludge flows back to the anaerobic tank. The method has the characteristics of simple process, good removal effect of estrogens, low operation cost, reasonable carbon source removal approach, stable system operation, high shock load resistance and the like and has strong practicability and operability in the aspect of improving the capability of the sewage treatment process with denitrifying and dephosphorizing functions to remove estrogens.

Description

technical field [0001] The invention relates to a new sewage biological treatment process, which is especially suitable for enhancing the removal of estrogen in sewage treatment plants with the functions of denitrification and phosphorus removal. Background technique [0002] The problem that environmental estrogen interferes with the endocrine system of humans and animals and affects health and reproduction is becoming more and more prominent. For example, the impact of environmental estrogen on human reproductive health can significantly reduce the average sperm density in men and cause endocrine dysfunction in women. Another example is that environmental estrogens cause fish teratogenicity, and fish with male and female characteristics have been caught in rivers downstream of certain urban sewage treatment plants in the United Kingdom, Switzerland and other places. Many countries such as Europe, America, Japan, and some international organizations have found through inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 杨小丽宋海亮
Owner SOUTHEAST UNIV
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