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Compound nitrifying bacterium and production method thereof

A technology of nitrifying bacteria and denitrifying bacteria, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unsatisfactory ammonia nitrogen removal, no denitrification, and single composition.

Inactive Publication Date: 2019-01-15
向勇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently commercially available nitrifying bacteria have a single composition, and the removal effect on ammonia nitrogen is unsatisfactory, and only has the function of converting ammonia nitrogen into nitrate or nitrite, and does not have the effect of denitrification; or only has the function of converting nitrate or nitrite The function of reducing nitrite to nitrogen gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present embodiment nitrifying bacteria: the total quantity ratio of denitrifying bacteria is 3: 2, and in the nitrifying bacteria, Nitrobacter winogradskyi (Nitrobacter winogradskyi), Microbacterium oxydans (Microbacterium oxydans), Rhodococcus ruber (Rhodococcus ruber), Nitrosomonas Europe ( Nitrosomonas europaea), Alcaligenes faecalis, Arthrobacter ramosus, Nitrobacter Hamburgensis.

[0043] Paracoccus denitrificans, Geobacillus pallidas, Pseudomonas fluorescens.

[0044] In a chemical sewage treatment plant, due to factors such as backward water treatment technology and the impact of accidental water, the effluent of ammonia nitrogen cannot meet the discharge standards. The value of ammonia nitrogen in the influent water is often in the range of 40-70mg / L. According to the situation, dosing 0.5- After 2% of the above-mentioned compound nitrifying bacteria, due to the lack of carbon source for the effective use of microorganisms in the raw sewage, under the additi...

Embodiment 2

[0046] In the present embodiment, the total number ratio of denitrifying bacteria to denitrifying bacteria is 5:3, Nitrobacter winogradskyi, Microbacterium oxydans, Rhodococcus ruber, Nitrosomonas european (Nitrosomonas europaea), Alcaligenes faecalis, Arthrobacter ramosus, Nitrobacter Hamburgensis, Paracoccus denitrificans, Geobacillus pallidas, Pseudomonas fluorescens (Pseudomonas fluorescens).

[0047] After the incremental transformation of an industrial sewage treatment plant, after the raw sewage was treated, the ammonia nitrogen in the effluent was slightly higher than that in the influent, which could not meet the discharge requirements. When the influent ammonia nitrogen fluctuates between 35-45mg / L, after adding 0.3-0.8% of the above-mentioned compound nitrifying bacteria according to the volume of the treated sewage, after 2-3 hours of treatment, the ammonia nitrogen value drops below 2.65mg / L , which is far lower than the 43.32mg / L value of the effluent treated by...

Embodiment 3

[0049] The present embodiment nitrifying bacteria: the total quantity ratio of denitrifying bacteria is 3: 2, and in the nitrifying bacteria, Nitrobacter winogradskyi (Nitrobacter winogradskyi), Microbacterium oxydans (Microbacterium oxydans), Rhodococcus ruber (Rhodococcus ruber), Nitrosomonas Europe ( Nitrosomonas europaea), Alcaligenes faecalis, Arthrobacter ramosus, Nitrobacter Hamburgensis

[0050] Paracoccus denitrificans (Paracoccus denitrificans), Geobacillus pallidas (Geobacillus pallidas), Pseudomonas fluorescens (Pseudomonas fluorescens) The waste water of a chemical industry group was catalyzed under the condition of influent COD and ammonia nitrogen of 7609mg / L and 1753mg / L respectively. The average COD of the effluent from the oxidation unit is about 1100mg / L, the average effluent ammonia nitrogen is about 330mg / L, and the effluent is further biochemically treated. In the biochemical treatment process, under the treatment of adding 2% of the above-mentioned compo...

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PUM

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Abstract

Belonging to the microbial sewage treatment field, the invention relates to a compound nitrifying bacterium and a production method thereof. The compound nitrifying bacterium comprises nitrifying bacteria, denitrifying bacteria, an enzyme and a stabilizer. Specifically, the enzyme is one or more of amylase, lipase and protease. The production method includes: culturing the nitrifying bacteria anddenitrifying bacteria respectively, then performing mixing in a ratio of (1-3):(1-5), and then adding a small amount of a medium and sodium benzoate to form a product. The compound nitrifying bacterial agent is mainly used for treatment of sewage with high content of ammonia nitrogen and / or total nitrogen, and also can be used in an advanced treatment unit for sewage with ammonia nitrogen and / or total nitrogen emission exceeding the standard, through the two steps of conversion of ammonia nitrogen with nitrifying bacteria and reduction of nitrate or nitrite to nitrogen with denitrifying bacteria, efficient treatment of sewage can be realized, and the ammonia nitrogen and / or total nitrogen of the treated effluent water meets the A level of grade 1 in the "discharge standard for pollutants of urban sewage treatment plants" (GB 18918-2002).

Description

technical field [0001] The invention belongs to the field of microbial sewage treatment, and in particular relates to a composition of compound nitrifying bacteria and a production method thereof. technical background [0002] With the rapid development of industry and the expansion of cities, more and more sewage is produced in the process of production or life. In addition to the large amount of water, it also has the characteristics of high COD and high ammonia nitrogen. The treatment methods of ammonia nitrogen can be divided into two categories: biological method and non-biological method. Among them, the common methods of non-biological method are: stripping method, steam stripping method, break point chlorination method, ion exchange method, catalytic wet oxidation method, chemical precipitation method etc.; the biological method mainly uses nitrifying bacteria and denitrifying bacteria to realize the conversion and removal of ammonia nitrogen. [0003] Biological tr...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/348
Inventor 向勇常莎
Owner 向勇
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