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A kind of treatment method of nitrogen-containing organic wastewater

A technology of organic waste water and treatment method, applied in the field of water treatment, can solve the problem of failure to fully consider the removal of nutrients such as nitrogen, and achieve the effects of reducing nitrogen content, effectively treating polluted environment, and having a wide range of applications.

Active Publication Date: 2015-08-19
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the treatment of sewage has been aimed at the removal of organic matter (COD) and suspended solids (SS), without comprehensive consideration of the removal of nutrients such as nitrogen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for treating nitrogen-containing organic waste water, comprising the following steps:

[0024] (1) Expose nitrogen-containing wastewater to sunlight for 3 days;

[0025] (2) Add ammonifying bacteria to the wastewater and keep it at 28°C for 24 hours; the ammonifying bacteria are Bacillus mycoides, Bacillus subtilis or Bacillus spoilage; the amount of ammonifying bacteria used is 300 per liter of wastewater / ml of bacterial culture solution 15ml;

[0026] (3) Add nitrifying bacteria into the wastewater and keep it at 28°C for 5 hours; the amount of nitrifying bacteria added is 3-10ml of bacterial culture solution per liter of wastewater;

[0027] (4) Add denitrifying bacteria to the wastewater, and keep at 33°C for 10 hours. The amount of denitrifying bacteria added is 3ml of bacterial culture solution per liter of wastewater;

[0028] (5) Use calcium hydroxide to adjust the pH of the wastewater to 10.5, adjust the water temperature to 40°C, and blow nitrogen ...

Embodiment 2

[0032] A method for treating nitrogen-containing organic waste water, comprising the following steps:

[0033] (1) Expose nitrogen-containing wastewater to sunlight for 4 days;

[0034] (2) Add ammonifying bacteria to the wastewater and keep it at 30°C for 15 hours; the ammonifying bacteria are Bacillus mycoides, Bacillus subtilis or Bacillus spoilage; the amount of ammonifying bacteria used is 5000 per liter of wastewater / ml of bacterial culture solution 20ml;

[0035] (3) Add nitrifying bacteria into the wastewater and keep at 25°C for 8 hours; the amount of nitrifying bacteria added is 10ml of bacterial culture solution per liter of wastewater;

[0036] (4) Add denitrifying bacteria to the wastewater, and keep at 30°C for 7 hours. The amount of denitrifying bacteria added is 10ml of bacterial culture solution per liter of wastewater;

[0037] (5) Use calcium hydroxide to adjust the pH of the wastewater to 10, adjust the water temperature to 38°C, and blow nitrogen into t...

Embodiment 3

[0041] A method for treating nitrogen-containing organic waste water, comprising the following steps:

[0042] (1) Expose nitrogen-containing wastewater to sunlight for 5 days first;

[0043] (2) Add ammonifying bacteria to the wastewater and keep it at 25°C for 20 hours; the ammonifying bacteria are Bacillus mycoides, Bacillus subtilis or Bacillus spoilage; the amount of ammonifying bacteria used is 10,000 per liter of wastewater / ml of bacterial culture solution 10ml;

[0044] (3) Add nitrifying bacteria into the wastewater and keep it at 26°C for 10 hours; the amount of nitrifying bacteria added is 3ml of bacterial culture solution per liter of wastewater;

[0045] (4) Add denitrifying bacteria to the wastewater, and keep at 33°C for 10 hours. The amount of denitrifying bacteria added is 3ml of bacterial culture solution per liter of wastewater;

[0046] (5) Use calcium hydroxide to adjust the pH of the wastewater to 10, adjust the water temperature to 40°C, and blow nitr...

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Abstract

The invention relates to the field of water treatment and specifically relates to a treatment method for nitrogen-containing organic wastewater. According to the method, the content of nitrogen in wastewater is gradually reduced through solarization, ammoniation, nitration, denitrification and oxidation by chlorine, and finally, the emission standard is realized. The treatment method has the advantages of wide application range, simple process and low operating cost, and is simple to operate.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a treatment method for nitrogen-containing organic wastewater. Background technique [0002] The wastewater produced in the production process of chemical industry, slaughtering, food processing, semiconductor and other industries contains very high content of nitrogen and organic matter, which is difficult to biodegrade. It is one of the difficulties and hot spots of wastewater treatment at home and abroad. For a long time, the treatment of sewage has been aimed at the removal of organic matter (COD) and suspended solids (SS), and the removal of nutrients such as nitrogen has not been fully considered. After the Taihu Lake cyanobacteria event caused by nitrogen and phosphorus eutrophication in 2007, the main contradiction of China's current environmental problems has begun to shift from organic pollutants to nitrogen. Nitrogen pollution is an important factor causing water eutrop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCY02W10/37
Inventor 孙静亚孙会玲邢宇
Owner ZHEJIANG OCEAN UNIV