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

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

Inactive Publication Date: 2011-11-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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) The activated sludge from the unacclimated municipal wastewater treatment plant was inoculated into the sequencing batch batch reactor. The effective volume of the sequencing batch batch reactor is 3.5L, the diameter of the outer tube is 10.0cm, and the height is 55cm, such as figure 1 shown.

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

[0025] (3) The water intake, stirring, aeration, settling and drainage time of the reactor are all automatic...

Embodiment 2

[0029] Specific steps are as follows:

[0030] (1) The short-range nitrification and denitrification granular sludge obtained from the cultivation is injected into the sequencing batch batch reactor. The effective volume of the sequencing batch batch reactor is 3.5L, the diameter of the outer tube is 10cm, and the height is 55cm.

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

[0032] (3) The water intake, stirring, aeration, settling and drainage time of the reactor are all automatically controlled by the dual time relay 7. The cycle time is 4 hours, including 6 minutes for water inflow, 4 minutes for water outlet, 1 hour for anaerobic stirring, 2 hours and 48 minutes for aera...

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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 intensification of nitrogen pollution and the enhancement of people's awareness of environmental protection, denitrification of wastewater has been paid more and more attention by people, and biological denitrification technology has achieved considerable development due to its incomparable advantages. Among the many new technologies for denitrification of sewage, short-range nitrification and denitrification is one of the most widely used and fast-growing new technologies. It controls the traditional nitrification reaction in the nitrosation stage and then performs denitrification. Compared with traditional nitrification and denitrification, short-cut nitrification and denitrification has the following...

Claims

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Application Information

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Patent Type & Authority Patents(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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