Preparation method of short-cut nitrification and denitrification granular sludge in high Do condition

A technology of granular sludge and short-range nitrification, applied in the direction of aerobic and anaerobic process treatment, can solve the problem of aerobic granulation affecting microbial activity, and achieve the effect of good stability and compact particle structure.

Inactive Publication Date: 2010-09-15
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Directly in high concentration NH 4 + Granular sludge is prepared under -N conditions, and there is an inhibitory effect of high concentration of free ammonia, which affects the activity of microorganisms and the occurrence of aerobic granulation

Method used

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  • Preparation method of short-cut nitrification and denitrification granular sludge in high Do condition
  • Preparation method of short-cut nitrification and denitrification granular sludge in high Do condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Specific steps are as follows:

[0023] (1) Inoculate the activated sludge from the municipal wastewater treatment plant that has not been domesticated into a batch batch reactor. Sequencing batch reactor has an effective volume of 3.5L, an outer tube diameter of 10.0cm, and a height of 55cm. figure 1 Shown.

[0024] (2) Air enters the reactor by the air pump 4 through a microporous aeration head 3 installed at the center of the bottom of the reactor, and the formed air flow makes the liquid and granular sludge in the reactor evenly mixed. Water is fed into the bottom of the reactor through the peristaltic pump 2, and the water is controlled by the solenoid valve 6. The water outlet is 25 cm high at the bottom of the reactor, the volume exchange rate is 50%, and the reactor is operated at room temperature (20-30°C).

[0025] (3) The water inlet, stirring, aeration, sedimentation and drainage time of the reactor are all automatically controlled by the dual time relay 7. The ...

Embodiment 2

[0029] Specific steps are as follows:

[0030] (1) The short-cut nitrification and denitrification granular sludge obtained by the culture is injected into a batch batch reactor. Sequencing batch reactor has an effective volume of 3.5L, an outer tube diameter of 10cm, and a height of 55cm.

[0031] (2) The air enters the reactor by the air pump 4 through a microporous aeration head 3 installed at the center of the reactor bottom, and enters water at the bottom of the reactor through the peristaltic pump 2, and the water outlet is controlled by the solenoid valve 6, and the drainage port is high at the bottom of the reactor. At 25 cm, the volume exchange rate is 50%.

[0032] (3) The water inlet, stirring, aeration, sedimentation and drainage time of the reactor are all automatically controlled by the dual time relay 7. The cycle time is 4h, including 6min of water inlet, 4min of water outlet, 1h of anaerobic stirring, 2h48min of aeration, and 2min of sedimentation. The aeration ca...

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Abstract

The invention proposes a preparation method of short-cut nitrification and denitrification granular sludge in high Do condition, which belongs to the technical field of waste water biological treatment. The short-cut nitrification and denitrification granular sludge mainly comprises bacilli and cocci and has higher nitrite depositing ability, denitrification ability and heterotroph activity so that the problem of free ammonia inhabitation caused when high NH4<+>-N selects and enriches nitrosation bacteria can be avoided and short-cut nitrification can be realized without increasing N2O release during short-cut nitrification in the high Do condition. The short-cut nitrification and denitrification granular sludge prepared by using the method has the advantages of compact granule structure and good stability, is suitable for treating the waste water with low COD (Chemical Oxygen Demand) and high NH4<+>-N, and can ensure the application of the short-cut nitrification and denitrification granular sludge in actual waste water treatment.

Description

1. Technical Field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to a preparation method of short-range nitrification and denitrification granular sludge under high DO conditions. 2. Background technology [0002] With the increase of nitrogen pollution and people's awareness of environmental protection, people pay more and more attention to wastewater denitrification. Among them, biological denitrification technology has gained considerable development due to its unparalleled advantages. Among the many new technologies for wastewater denitrification, short-cut nitrification and denitrification is one of the new technologies that are widely used and rapidly developed. It controls the traditional nitrification reaction in the nitrification stage and then performs denitrification. Compared with traditional nitrification and denitrification, short-cut nitrification and denitrification has the following advantages: it can save abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 王新华石义静王曙光于海波高明明刁目贺祁振
Owner SHANDONG UNIV
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