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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 su

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] 1. Preparation of B8 bacterial agent

[0019] Use a sterilized inoculating pen to pick 1 environmentally friendly Pseudomonas putida B8 hidden in the slant medium, and inoculate it in a 100 mL conical flask containing 50 mL DNJPU medium pH 6.5 after high temperature steam sterilization, and place it on a shaker. (Set culture temperature 30℃, shaker speed 120r / min) Shake culture for 20h to obtain B8 preparation (the number of viable bacteria is 6.25×10 7 ~8.55×10 7 cfu / mL).

[0020] 2. Bacteria inoculation in constructed wetlands

[0021] The tail water of the urban sewage treatment plant that meets the "Urban Sewage Treatment Plant Pollutant Discharge Standard" (GB18918-2002) level B water quality standard is treated as wastewater to be treated in the subsurface wetland system for treatment. The prepared B8 formulation was added to the horizontal subsurface flow constructed wetland system, and the specific operation was as follows: the B8 formulation was added to 0.2% of the ...

Example Embodiment

[0025] Example 1

[0026] This embodiment treats 12m of tail water from a 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 B8 formulation enhanced subsurface flow wetland system is operated for 6 days, and its denitrification effect is monitored. The specific operation is: adopt the operation mode for water intake-wetland deep purification The 24h-empty constructed wetland system deeply purifies the tail water of the sewage treatment plant.

[0027] Table 1 Construction, operation and treatment water quality of the undercurrent wetland system

[0028]

Example Embodiment

[0029] Example 2

[0030] This embodiment treats 21m of tail water from a 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 of the B8 formulation enhanced subsurface flow wetland system is monitored for 19 days, and the specific operation is: the operation mode is the water intake-wetland deep purification The 24h-empty constructed wetland system deeply purifies the tail water of the sewage treatment plant.

[0031] Table 2 Construction, operation and treatment water quality of the undercurrent 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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