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Biological treatment method and system used for urban polluted water body restoration

A technology for biological treatment and water body restoration, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of heavily polluted water bodies, anaerobic state, high ammonia nitrogen, etc., and achieve improvement Hydrodynamics, improvement of water black and odor, good denitrification effect

Inactive Publication Date: 2017-04-26
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a biological treatment method and system for the restoration of urban polluted water bodies. The present invention can quickly reduce the ammonia nitrogen load of urban heavily polluted water bodies, and at the same time increase the oxidation-reduction potential and dissolved oxygen level of water bodies to achieve rapid water purification and The purpose of improving the ecological environment of water bodies is to solve the problems of anaerobic state and high ammonia nitrogen in urban heavily polluted water bodies

Method used

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  • Biological treatment method and system used for urban polluted water body restoration
  • Biological treatment method and system used for urban polluted water body restoration

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example 1

[0051] Set up three groups of experiments A, B, and C. The experimental system includes 2L of raw river water and 280g of raw sediment. Group A is the control group without any treatment; Groups B and C are the experimental groups, and group B only performs in-situ aeration. Group C added 400mL of biofilm reactor effluent every day, and at the same time discharged an equal amount of river water for circulation. The biofilm reactor effluent stayed in reactor C for 5 days. After 15 days, samples were taken for monitoring. The water quality of groups A, B, and C is shown in Table 1.

[0052] Table 1 Water quality of indoor simulation experiment

[0053]

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Abstract

The invention discloses a biological treatment method and system used for urban polluted water body restoration. The biological treatment method comprises the steps of conducting oxidation on the polluted water body, and afterwards, discharging the polluted water body into original polluted water body to be subjected to in situ nitrogen removal by denitrification, wherein the oxidation step and the step of in situ nitrogen removal by denitrification are circularly conducted so as to achieve restoration of the polluted waste water. Before the polluted water body is discharged into the original polluted water body, the biological treatment method further comprises the step of conducting aeration on the polluted water body. According to the biological treatment method and system, black and odorous conditions of the water body can be effectively solved, the denitrification effect is good, hydrodynamic force can be improved at the same time, dissolved oxygen is increased, and a self-cleaning capacity of the water body is strengthened; water quality of the water body is improved, redox potential of the water body is improved at the same time, endogenesis release of bottom mud is inhibited, and ecological environment of the water body is quickly reversed.

Description

technical field [0001] The invention relates to a biological treatment method and system for urban polluted water restoration, belonging to the technical field of water environment pollution control. Background technique [0002] In recent years, with the continuous advancement of urban construction in our country, the urban population has continued to grow, and the population of residents around water bodies in many rapidly developing urban areas has continued to increase. Odor and eutrophication occur continuously. Polluted rivers are not only dirty in appearance, but also have high pollutant content, which seriously threatens the health and safety of residents. Therefore, the purification of heavily polluted urban water bodies is a necessary technology for urban water treatment. [0003] Because polluted water bodies usually show the characteristics of high pollutant load and low dissolved oxygen, and the sediment is long-term anaerobic and has a strong oxygen consumptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/30C02F3/302
Inventor 王慧肖垚张少华
Owner TSINGHUA UNIV
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