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Biological denitrification method of high ammonia-nitrogen wastewater

A biological denitrification and high ammonia nitrogen technology, applied in the field of biological denitrification process of high ammonia nitrogen wastewater, can solve the problems of short startup time, long time consumption, high operating costs, etc., and achieve strong engineering practicability, high denitrification efficiency, start-up short time effect

Active Publication Date: 2016-05-25
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the high operating cost of the existing anaerobic ammonium oxidation denitrification process, the technical defects that complete denitrification cannot be achieved, and the time-consuming technical defects, and provide people with a whole-process non-powered autotrophic operation with high denitrification efficiency , to start the biological denitrification process of high ammonia nitrogen wastewater with short time consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The biological denitrification process of high ammonia nitrogen wastewater in this example is to add aerobic or anaerobic sludge into the reactor as seed sludge under anaerobic or anoxic conditions; The molar ratio of the ammonia nitrogen concentration is 2:1, which is added to the high ammonia nitrogen wastewater and mixed, then the high ammonia nitrogen wastewater is added to the reactor, and the pH value of the high ammonia nitrogen wastewater is adjusted to 7.5, at 35 o C, the high ammonia nitrogen wastewater stays in the reactor for 5 days, and then discharges up to the standard.

[0025] The inoculum sludge was nitrifying sludge. The anaerobic or anoxic condition is that the dissolved oxygen in the high ammonia nitrogen wastewater in the reactor is 0.3mg / L. The ammonia nitrogen concentration of high ammonia nitrogen wastewater is 300mgN / L, and the ferric ion concentration is 2400mgFe / L.

[0026] In this example, the removal rate of ammonia nitrogen can reach 90....

Embodiment 2

[0028] In this example, the inoculation sludge is anaerobic ammonium oxidation sludge, and the high-ammonia nitrogen wastewater is pig farm wastewater anaerobic digestion solution, the ammonia nitrogen concentration is 500mgN / L, and the ferric ion concentration is 4000mgFe / L. All the other are the same as embodiment one.

[0029] In this example, the removal rate of ammonia nitrogen can reach 86.25%, and the volume removal load can reach 0.345kgN / (m 3 d).

Embodiment 3

[0031] In this example, the inoculation sludge is nitrification sludge and anammox sludge, and the high ammonia nitrogen wastewater is pig farm wastewater anaerobic digestion solution, the ammonia nitrogen concentration is 450mgN / L, and the ferric ion concentration is 3600mgFe / L. All the other are the same as embodiment one.

[0032] In this example, the removal rate of ammonia nitrogen can reach 98.17%, and the volume removal load can reach 0.353kgN / (m 3 d).

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PUM

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Abstract

The invention belongs to the field of wastewater treatment, and discloses a biological denitrification method of high ammonia-nitrogen wastewater. The biological denitrification method comprises following steps: under anaerobic or anoxic conditions, aerobic sludge or anaerobic sludge is taken as inoculated sludge, and is delivered into a reactor; ferric ions are added into high ammonia-nitrogen wastewater for mixing at a ferric ion to ammonia nitrogen molar ratio of 1.0-6.0:1, the high ammonia-nitrogen wastewater is delivered into the reactor, pH value of the high ammonia-nitrogen wastewater is adjusted to 6.5 to 8.5, the high ammonia-nitrogen wastewater is reacted for 0.5 to 5 days at 15 to 35 DEG C in the reactor, and then up-to-standard release is carried out, or a next treatment process is carried out. Technical defects of conventional anaerobic ammonia oxidation denitrification method, such as high operating cost, incomplete denitrification, and long time consumption are avoided; whole course unpowered autotrophy operation of biological denitrification of high ammonia-nitrogen wastewater is realized; denitrification efficiency is high; and starting time consumption is relatively short.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a biological denitrification process for high ammonia nitrogen wastewater. Background technique [0002] The biological denitrification technology of wastewater is an important way to prevent and control nitrogen pollution in water bodies, and has been widely used in the denitrification treatment of high ammonia nitrogen wastewater. Among many biological denitrification technologies, the anaerobic ammonium oxidation process has become a research hotspot due to its unique denitrification method. The principle of anammox denitrification is: under anaerobic or anoxic conditions, anammox bacteria use ammonia nitrogen as an electron donor and nitrite nitrogen as an electron acceptor, and directly convert the two into N 2 , is a completely autotrophic process. However, the nitrogen in the actual wastewater is often dominated by ammonia nitrogen, and the acquisition of nitr...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F101/16
Inventor 郑丹邓良伟蒲小东
Owner BIOGAS SCI RES INST MIN OF AGRI