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Method for removing ammonia nitrogen and total nitrogen in tail water with bacterial agent strengthened subsurface flow wetland

A technology for subsurface wetlands and tail water, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problem of low denitrification effect, improve the removal effect, save investment, and slow down the replacement of fillers The effect of frequency

Inactive Publication Date: 2016-04-06
CHANGZHOU UNIV
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the denitrification effect of low-carbon source and nitrogen-containing tail water is not high in subsurface wetland treatment, and to provide a method for removing ammonia nitrogen and total nitrogen in tail water by intensifying subsurface flow wetland with bacterial agents

Method used

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  • Method for removing ammonia nitrogen and total nitrogen in tail water with bacterial agent strengthened subsurface flow wetland
  • Method for removing ammonia nitrogen and total nitrogen in tail water with bacterial agent strengthened subsurface flow wetland
  • Method for removing ammonia nitrogen and total nitrogen in tail water with bacterial agent strengthened subsurface flow wetland

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preparation example Construction

[0018] 1. Preparation of B8 bacterial agent

[0019] Use a sterilized inoculation pen to pick 1 round of Pseudomonas putida B8 stored in the slant medium, inoculate it into a 100mL Erlenmeyer flask containing 50mL DNJPU medium with a pH of 6.5 after high-temperature steam sterilization, and place it on a shaker (Set the culture temperature at 30°C, the shaking table speed at 120r / min) and shake and cultivate for 20h to obtain the B8 preparation (the number of viable bacteria in the bacterial preparation is 6.25×10 7 ~8.55×10 7 cfu / mL).

[0020] 2. Inoculation of constructed wetlands

[0021] The tail water of the urban sewage treatment plant that meets the first-class B water quality standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plant" (GB18918-2002) enters the subsurface wetland system as untreated wastewater for treatment. The prepared B8 preparation is added to the horizontal subsurface flow artificial wetland system, and its specific operation...

Embodiment 1

[0026] This embodiment treats 12m of tail water from the sewage treatment plant 3 / d. After the inoculation operation of the constructed wetland (the porosity of the wetland filler is 30.75%) is completed, the denitrification effect is monitored after the B8 preparation enhanced subsurface flow wetland system is operated for 6 days. The specific operation is: the operation mode is water inflow-wetland deep purification The 24h-empty artificial wetland system performs deep purification of the tail water of the sewage treatment plant.

[0027] Table 1 Construction, operation and water quality status of subsurface flow wetland system

[0028]

Embodiment 2

[0030]This embodiment treats 21m of tail water from the sewage treatment plant 3 / d. After the inoculation operation of the constructed wetland (the porosity of the wetland filler is 34.34%) is completed, the denitrification effect is monitored after the B8 preparation enhanced subsurface flow wetland system has been operated for 19 days. The 24h-empty artificial wetland system performs deep purification of the tail water of the sewage treatment plant.

[0031] Table 2 Construction, operation and water quality status of subsurface flow wetland system

[0032]

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Abstract

The invention discloses a method for removing ammonia nitrogen and total nitrogen in tail water with a bacterial agent strengthened subsurface flow wetland, and belongs to the technical field of water treatment. A B8 preparation is added in a subsurface flow constructed wetland, is allowed to coexist with biofilms of the surface and pores of a wetland substrate, and becomes dominant flora, so that a nitrogen removal function of a wetland system is strengthened, the concentration of the ammonia nitrogen and the total nitrogen in the tail water can be effectively reduced, and the problem of low nitrogen removal efficiency of the subsurface flow wetland on treatment of tail water with low carbon source and containing nitrogen is overcome. The method has the characteristics of low investment, low cost, stable treatment effect, convenient operation and management and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing ammonia nitrogen and total nitrogen in tail water by intensifying subsurface flow wetlands with bacterial agents. Background technique [0002] In recent years, the tail water of some domestic sewage treatment plants has been discharged into nearby lakes, ponds and rivers, causing surface water pollution and eutrophication of water bodies is becoming more and more serious. Horizontal subsurface flow constructed wetland is a sewage treatment technology that cooperates with soil, filter materials, and plants to purify water quality through physical, chemical, and biological actions. It is mostly used in advanced treatment of tail water in sewage treatment plants. However, the bottom of the subsurface wetland has been in an anaerobic environment for a long time, and the tail water entering the wetland system has a lower COD concentration tha...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/32
CPCC02F3/32C02F3/341C02F2101/16Y02W10/10
Inventor 张文艺陈晶何敏张伟熊慧琴
Owner CHANGZHOU UNIV
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