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Culture method of sludge with synchronous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions

A technology of anaerobic ammonia oxidation and cultivation method is applied in the field of wastewater treatment to achieve the effects of convenient operation, rapid construction and less output

Active Publication Date: 2020-04-03
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anaerobic ammonium oxidation process has not yet been applied on a large scale in domestic sewage treatment plants, and most of them are still in the laboratory stage. Therefore, the rapid and stable acquisition of anaerobic ammonium oxidation sludge is the primary problem to be solved when starting the process

Method used

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  • Culture method of sludge with synchronous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions
  • Culture method of sludge with synchronous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions
  • Culture method of sludge with synchronous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions

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Embodiment

[0031] In this embodiment, the activated sludge of stage O in the A / A / 0 process of the local municipal sewage treatment plant is used as the inoculation sludge.

[0032] Pretreatment stage: intermittent aeration treatment is performed on the sludge, the aeration interval is: aeration 4 hours, hypoxia 8 hours, duration 2 days.

[0033] The first stage: Use a 500ml serum bottle as a culture device to control the sludge concentration MLSS at about 1.0g / L. Use synthetic wastewater as nutrient solution for cultivation, see Table 1:

[0034] Table 1 Composition of synthetic nutrient solution

[0035]

[0036]

[0037] Note: NO 3 - -N means that the concentration of nitrate is measured by the mass of N, ie mg N / L, which means how many milligrams of nitrogen there is per liter of water. Similarly, NH 4 + -N, NO 2 - -N, KH 2 PO 4 -P.

[0038] The culture device is placed in a constant temperature water bath shaker, and a constant temperature of 30° C. and a rotation speed of 140 r / min are sele...

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Abstract

The invention discloses a culture method of sludge with synchronous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions. The method comprises sludge inoculation pretreatment and two stages. In a first stage, pretreated sludge is inoculated into a culture device, the culture device is filled with an initial artificially synthesized nutrient solution, the culture device is put into a constant-temperature water bath oscillator, and a reaction period is set. In a second stage, the concentrations of NO3<-> ions, Na2S2O3.5H2O and CH3COONa.3H2O in the artificially synthesizednutrient solution are increased, the concentration of NO2<-> ions at the end of the first stage is maintained, the concentration of other nutrients is not changed, and a continuous reaction is carried out in the culture device. The culture method has the technical effects that activated sludge of a sewage treatment plant is used as inoculated sludge, anaerobic ammonium oxidation bacteria and sulfur oxidation bacteria are enriched in a single mixed system at the same time, and a symbiotic system is constructed in a short time.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically, relates to a method for cultivating sludge with simultaneous sulfur autotrophic denitrification and anaerobic ammonia oxidation functions. Background technique [0002] With the continuous development of my country's petroleum, pharmaceutical, chemical, papermaking and other industries, the amount of sulfur-containing and nitrogen-containing wastewater produced during the production process is also increasing. If the sulfur-containing wastewater is directly discharged into the municipal sewage treatment plant, it will cause a series of reaction problems. On the one hand, sulfide is corrosive, and the transfer of sulfur-containing wastewater will cause corrosion of pipeline equipment; on the other hand, sulfide is biologically toxic, and the presence of low concentration of sulfide will significantly inhibit the metabolic activity of water treatment microorganisms . At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/10C02F101/16C02F101/30
CPCC02F3/28C02F3/34C02F3/345C02F2101/101C02F2101/16C02F2101/163C02F2101/30
Inventor 柴宏祥阳妍邵知宇孔政刘诗艺
Owner CHONGQING UNIV
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