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Method for treating high concentration ammonia nitrogen waste water

A technology of ammonia nitrogen wastewater and treatment method, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problem of low ammonia nitrogen concentration and organic matter content, and achieve the effect of reducing the number of times.

Active Publication Date: 2008-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitrifying bacteria obtained by this method are not suitable for treating wastewater with high concentration of ammonia nitrogen and low organic matter content, or even no organic matter

Method used

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  • Method for treating high concentration ammonia nitrogen waste water

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Experimental program
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Effect test

Embodiment 1

[0026] Nitrifying bacteria are enriched by intermittent activated sludge method. The activated sludge is taken from the sludge at the outlet of the secondary settling tank in the wastewater treatment workshop of the refinery, and inoculated into the enrichment reactor with an inoculation amount of 30v%, with a total volume of 3L , and then add the enrichment medium, wherein the composition of the enrichment medium used is (NH 4 ) 2 SO 4 , FeSO 4 ·7H 2 O, MgSO 4 ·7H 2 O, NaCl, CaCl 2 and KH 2 PO 4 , the concentration is as follows: NH 4 + -N initial concentration is 150mg / L, final concentration is 1000mg / L; Fe 2+ The concentration is 12mg / L; Mg 2+ The concentration is 18mg / L; Na + The concentration is 800mg / L; Ca 2+ The concentration is 16mg / L; KH 2 PO 4 The concentration is 260mg / L. During the enrichment process, NaHCO 3 Control pH. The culture conditions are: temperature: 24°C; pH=6.0-7.5; SV: 15%-20%; DO: 10mg L -1 . One cycle per day, water intake time ...

Embodiment 2

[0029] Nitrifying bacteria are enriched by intermittent activated sludge method. The activated sludge is taken from the outlet sludge of the secondary settling tank in the wastewater treatment workshop of the refinery, and inoculated into the enrichment reactor with an inoculum of 22v%, with a total volume of 3L , and then add the enriched culture solution, wherein the composition of the enriched culture solution used is the same as in Example 1, but the concentration is different, specifically as follows: NH 4 + -N initial concentration is 100mg / L, final concentration is 550mg / L; Fe 2+ The concentration is 6mg / L; Mg 2 + The concentration is 10mg / L; Na + The concentration is 300mg / L; Ca 2+ The concentration is 8mg / L; KH 2 PO 4 The concentration is 100mg / L. During the enrichment process, NaHCO 3 Control pH. The culture conditions are: temperature: 25°C; pH=6.0-7.5; SV: 15%-25%; DO: 5mg·L -1 . 2 cycles per day, water intake time is 10 minutes, aeration is 11 hours, na...

Embodiment 3

[0032] Nitrifying bacteria are enriched by intermittent activated sludge method. The activated sludge is taken from the outlet sludge of the catalyst wastewater treatment workshop and inoculated in the enrichment reactor with an inoculation amount of 28v%. The total volume is 3L, and then the enriched Collect culture fluid, wherein the enrichment culture fluid composition used is the same as embodiment 1, but the concentration is different, specifically as follows: NH 4 + -N initial concentration is 180mg / L, final concentration is 800mg / L; Fe 2+ The concentration is 10mg / L; Mg 2+ The concentration is 12mg / L; Na + The concentration is 500mg / L; Ca 2+ The concentration is 10mg / L; KH 2 PO 4 The concentration is 200mg / L. During the enrichment process, NaHCO 3 Control pH. The culture conditions are: temperature: 28°C; pH=6.0-8.5; SV: 15%-20%; DO: 8mg·L -1 . One cycle per day, water intake time is 30 minutes, aeration is 22.5 hours, natural settlement is 40 minutes, superna...

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Abstract

The present invention provides a waste processing method having concentrated ammonian. The activated sludge is nitrobacteria sludge of accumulation culture, the culture course is following: enrichment is processed by method of gradually increasing ammonian concentration in culture fluid employing a sequencing batch reactor activated sludge system, the primary constituent of the accumulation culture fluid is inorganic salt, microelement Fe, Mg, Na and K, and a buffer, wherein initial concentration of NH4 / +N is 100mg / L-200mg / L, the final concentration is 500mg / L-1200mg / L; COD< / =200mg / L. Accumulation culture nitrobacteria processes water waste having a high ammonian concentration which is 1200mg / L, COD< / =200mg / L, high concentration ammonian in the waste is below 10mg / L.

Description

technical field [0001] The invention relates to a method for treating wastewater containing ammonia nitrogen, in particular to the application of high-efficiency nitrifying bacteria enriched with activated sludge as a raw material in treating wastewater with high concentration of ammonia nitrogen, and belongs to the technical field of biological environmental protection. Background technique [0002] In recent years, with the development of industry and agriculture, the problem of eutrophication of water bodies has become increasingly prominent, and the impact of ammonia nitrogen wastewater on the environment has attracted great attention in the field of environmental protection worldwide. [0003] With the increasing requirements of countries around the world to meet the discharge standards for external wastewater discharge and the continuous strengthening of environmental protection law enforcement, it is more difficult to treat wastewater with high ammonia nitrogen content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/34
CPCY02W10/10
Inventor 高会杰佟明友张全许谦
Owner CHINA PETROLEUM & CHEM CORP
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