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Nitrogen Removal Technology

Nitrogen Removal Technology

The biological denitrification process includes ammonia oxidation, nitrosation, nitrification and denitrification. The process of organic matter degradation and carbonization is also accompanied by these processes. Comprehensive consideration of various factors (such as strains and their value-added rate, dissolved oxygen, pH, temperature, load, etc.) can effectively reduce and improve the overall process of biological nitrogen removal.



Biological nitrogen removal reaction conditions and characteristics

Reaction conditions and characteristics

nitrification

Nitrogen removal

Nitrosation

nitrification

Related microorganisms

Mainly ammonia oxidizing bacteria

(autotrophic bacteria)

Mainly nitrous oxide bacteria (autotrophic type)

About half of facultative anaerobes

Oxygen sources

O2

O2

DO

2 mg/L above

0.3-0.8

Basicity

Oxidation 1 g consumes 7.14 g alkalinity

No change

Reduction of 1 g produces g 3.57 alkalinity

Best pH value

7~8.5

6.75

6~8

Water temperature

Best water temperature 30℃

Acceleration/ d-1

0.21~1.08

0.28~1.44

0.4~0.5

Decomposition velocity

7 mg

2~8 mg

Sludge yield

0.04~0.13 mgVS S

0.02~0.07 mgVSS

16%(CH)3OH/C5H7O2N,)

 



Micro Boost®-Den is a biological preparation developed for the needs of sewage treatment and denitrification. It is a professional composition of biological preparations, enzyme preparations and nutrients selected from nature. It is mainly used to improve the total nitrogen removal capacity of sewage treatment systems , Usually used in anaerobic or hypoxic areas. The efficiency of nitrogen and phosphorus removal in conventional sewage treatment systems is not high. In this case, Micro Boost®-Den can help the system improve the removal capacity of total nitrogen in the sewage system.

 

High-efficiency bacteria: 1. Improve the removal of total nitrogen and improve the operation under low temperature conditions; 2. Improve the removal of BOD, Micro Boost®-Den can remove BOD under facultative conditions; 3. Can improve the removal ability of refractory organic matter (For example, amines) 4. Reduce the risk of excessive phosphorus in effluent.


NO3- + cBOD ─(Strain)→ NO2- + CO2 + H2O

NO2- + cBOD ─(Strain)→ N2↑ + CO2 + H2O


For the selection of denitrifying carbon sources, we strongly recommend the use of Making Green's environmentally friendly Bio Max®-Carbon high-efficiency carbon source. The product is a new type of carbon source product produced by fermentation and special enzymatic hydrolysis technology with various minerals as raw materials. Bio Max®-Carbon products have the characteristics of a small amount of dosing, easy to be absorbed by microorganisms, reduce the production of organic sludge by 50%, and improve the activity of sludge. It is an indispensable carbon source product for system commissioning or shortening the recovery time, and it is also the carbon source of choice for traditional nitrogen removal processes. This product is a broad-spectrum, high-efficiency liquid product, non-dangerous, non-corrosive, and will not crystallize around zero degrees. It is convenient for transportation, storage and use.


Compared with traditional carbon sources:

Parameter (20 ℃)

glucose

Sodium acetate

Bio Max®- Carbon

Denitrification rate SDNR

kgNO3/kgMLVSS.d

0.07

0.603

0.638

Sludge productionVSS/COD

0.8

0.65

0.2-0.41

COD equivalentkg/kg

0.6

0.68

0.6-1

COD/TN

6-7

5.2

4.2

The amount of carbon source added after removing 1kg TNkg

10

12.7

4.2-7


Remarks: Remove 1kg TN carbon source dosage, QC = TN (1kg) * (COD / TN) / COD equivalent / purity