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Short-cut nitrification and denitrification coupling anammox denitrification process and control method

A technology of anaerobic ammonium oxidation and short-cut nitrification, which is applied in the field of short-cut nitrification and denitrification coupling anammox denitrification process and control, which can solve the problems of low COD efficiency, inability to treat organic wastewater, and limited denitrification efficiency and COD removal efficiency. , to achieve the effect of less control parameters, good promotion and application value, and overcome the poor effect of COD removal

Active Publication Date: 2020-04-17
TAIYUAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this process, due to the consumption of a large amount of nitrite by anaerobic ammonium oxidation, only a small part of nitrate is produced, so that the COD efficiency of subsequent denitrification removal is very low, generally only 20-60%; It has a significant inhibitory effect on anammox bacteria, which makes the process unable to treat organic wastewater containing high concentrations of COD. For the treatment of wastewater containing high concentrations of COD and ammonia nitrogen at the same time (such as coking wastewater, tanning wastewater, pharmaceutical wastewater and Coal gasification wastewater) and other medium and low C / N ratio wastewater, the denitrification efficiency and COD removal efficiency of this process are still limited

Method used

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  • Short-cut nitrification and denitrification coupling anammox denitrification process and control method

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Embodiment 1

[0029] A short-cut nitrification and denitrification coupled anaerobic ammonium oxidation denitrification process and control method, comprising the following steps:

[0030] (1) The SBBR reactor filled with polyurethane (PU) sponge filler 5 is used, and the filling rate of the carrier filler is controlled at 50%~60%; among them, the filler is polymer synthetic hydrophilic polyurethane biofiller, with a side length of 2.5cm, And it is formed by double explosion of oxygen and hydrogen, with a hole diameter of 2~7mm, which penetrates each other.

[0031] The structure of the SBBR reactor is as follows figure 1 As shown, the bottom is provided with a microporous aeration disc 6, and the aeration is provided by an air compression pump 9, which is connected to a gas rotameter 8 to adjust the air intake, and a mixing pump 7 is installed inside to ensure the full mixing of water, microorganisms and oxygen. Stir. A temperature control rod 3 and an online monitor 4 for pH, DO and ORP...

Embodiment 2

[0040] A short-cut nitrification and denitrification coupling anaerobic ammonia oxidation denitrification process and control method, the steps are the same as in Example 1, the difference is that the pretreated coal gasification wastewater B is treated in step (5), and the influent COD is about 700mg / L, Ammonia nitrogen: 320mg / L; in step (7), the removal rate of COD after treatment reaches 92%, the removal rate of ammonia nitrogen reaches 95%, and the removal rate of total nitrogen reaches 86%.

Embodiment 3

[0042] A short-range nitrification and denitrification coupling anaerobic ammonia oxidation denitrification process and control method, the steps are the same as in Example 1, the difference is that the pretreated slaughter wastewater C is treated in step (5), and the influent COD is about 1100 mg / L. Ammonia nitrogen: 220mg / L; in step (7), the removal rate of COD after treatment reaches 95%, the removal rate of ammonia nitrogen reaches 93%, and the removal rate of total nitrogen reaches 85%.

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Abstract

The invention discloses a short-cut nitrification and denitrification coupled anammox (anaerobic ammonium oxidation) and denitrification process and control method, comprising the steps of (1) using an SBBR (sequencing batch biofilm reactor) filled with polyurethane sponge, and controlling carrier filling rate to 50-60%, wherein the bottom of the SBBR is provided with a microporous aerating disc, aeration is achieved via an air compression pump, a gas rotor flowmeter is connected to adjust gas intake, and a mixing pump is arranged inside to ensure full mixing of water, microorganisms and oxygen; the SBBR is provided with an online monitor for monitoring parameters, such as temperature, pH, DO (dissolved oxygen) and ORP (oxidation reduction potential). The problem that individual anammox process and simultaneous partial nitrification, anammox and denitrification process have poor removal effect is overcome.

Description

technical field [0001] The invention belongs to the field of wastewater biological treatment, and specifically relates to a short-range nitrification and denitrification coupling anaerobic ammonium oxidation denitrification process and a control method. Background technique [0002] Excessive discharge of nitrogen is one of the important causes of water hypoxia, odor and eutrophication. Biological nitrogen removal is the most widely used technology for wastewater nitrogen removal. However, due to the high ammonia nitrogen and low carbon nitrogen ratio wastewater, the traditional biological denitrification process centered on anoxic / aerobic (A / O) has low denitrification efficiency and high energy consumption and operating costs. The development of energy-saving and high-efficiency biological nitrogen removal technology with low process operation cost has research value and significance for the treatment of high-concentration ammonia-nitrogen and low C / N ratio wastewater. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/307
Inventor 周鑫张泽乾张鑫爱
Owner TAIYUAN UNIV OF TECH
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