High-efficiency running method by using sequencing batch full-autotrophic denitration granular sludge

A technology for full autotrophic denitrification and granular sludge, applied in the field of full autotrophic denitrification (CANON) process granular sludge. Effect

Active Publication Date: 2014-05-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CANON process, especially the denitrification ability of CANON granular sludge is significantly affected by dissolved oxygen (DO), and a small change in dissolved oxygen will lead to a significant change in the denitrification effect

Method used

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  • High-efficiency running method by using sequencing batch full-autotrophic denitration granular sludge
  • High-efficiency running method by using sequencing batch full-autotrophic denitration granular sludge
  • High-efficiency running method by using sequencing batch full-autotrophic denitration granular sludge

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specific Embodiment 1

[0033] The efficient operation method of sequencing batch type full autotrophic denitrification granular sludge, the influent is to add a certain amount of (NH 4 ) 2 SO 4 , NaHCO 3 and KH 2 PO 4 It is configured, and an appropriate amount of trace elements are added at the same time. The specific water quality is as follows:

[0034] The mass concentration of ammonia nitrogen is 380-420mg / L, the mass concentration of phosphate is 5-10mg / L, the mass concentration of alkalinity (as CaCO 3 Total) is 1400-2000mg / L. The dosage of the trace element mixture is 1mg / L, including (mg / L):

[0035] Nutrient solution I: EDTA5.00FeSO 4 .7H2O5.00 nutrient solution II: EDTA15.00H 3 BO 4 0.014MnCl 2 .4H 2 O0.099CuSO 4 .5H 2 O0.25ZnSO 4 .7H 2 O0.43NiCl 2 .6H 2 O0.19Na 2 SeO 4 .10H 2 O0.21Na 2 MoO 4 .2H 2 O0.22NaWO 4 .2H 2 o

[0036] Reactor form: The reactor is made of plexiglass, cylindrical, with an inner diameter of 7mm, a total height of 1000mm, a total volume of 3...

Embodiment 2

[0040] The water inflow of embodiment two is basically the same as that of embodiment one, the main difference lies in the form of the reactor.

[0041] Reactor form: The reactor is made of plexiglass, cylindrical, with an inner diameter of 15mm, a total height of 500mm, a total volume of 8.83L, and an effective volume of 7L. Due to the large cross-sectional area of ​​the reactor, the ordinary aeration ring has uneven aeration, so a sand tray aeration device is used at the bottom, and the aeration volume is controlled by a gas rotameter. Seed slime and embodiment one come from the same reactor.

[0042] The operation mode includes five stages of water intake, reaction, sedimentation, drainage and idleness. The water is fed from the upper part by a peristaltic pump; in the reaction stage, the water temperature is controlled at 30±1°C, and the aeration is controlled at five concentration gradients of 0.1, 0.2, 0.3, 0.4, and 0.5mg / L, pH8.0±0.1, and HRT is 11h ; Sedimentation ti...

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Abstract

The invention discloses a high-efficiency running method by using sequencing batch full-autotrophic denitration granular sludge and belongs to the field of treatment and regeneration of sewage and wastewater with the high ammonia nitrogen content. In a sequencing batch reactor, on the basis of the application of the started CANON granular sludge, the influence, caused by dissolved oxygen, on the running of the reactor is researched. The high-efficiency running method comprises the steps of, , and researching a method for enabling the reactor to run with the high efficiency under the conditions that the CANON granular sludge is taken as seed sludge, the dissolved oxygen which is necessary to reaction is supplied through aeration, and a certain dissolved oxygen gradient is controlled. The problem that the long-time influence, caused by the dissolved oxygen, on the running efficiency of the CANON granular sludge cannot be determined is solved; the small influence, caused by short-time or delay aeration, on the reaction is verified; a new concept is supplied to the engineering application of CANON in treatment of the wastewater with the high ammonia nitrogen content.

Description

technical field [0001] The invention belongs to the field of high ammonia nitrogen sewage treatment and regeneration. It specifically relates to an efficient operation method for solving the granular sludge of the whole process autotrophic denitrification (CANON) process under the condition of high ammonia nitrogen. Background technique [0002] The development of science and technology has provided many conveniences for human life, but it has also made human society and the natural environment face severe challenges. Taking China as an example, the 2012 China Environmental Status Bulletin clearly stated that in 2011, the country's surface water was generally slightly polluted. The problem of eutrophication in lakes (reservoirs) is still prominent. Among them, the tributaries of the Yangtze River, the Yellow River, and the Pearl River are still the main pollution caused by ammonia nitrogen pollution. Most of the ammonia nitrogen pollution in these water systems is caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李冬苏庆岭吴青梁瑜海崔少明张肖静杨胤张翠丹范丹张玉龙周元正门绚何永平曾辉平张杰
Owner BEIJING UNIV OF TECH
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