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Method for rapidly forming anammox granule sludge

An anammox and granular sludge technology, applied in anaerobic digestion treatment and other directions, can solve the problems of small particle size of anammox sludge, unfavorable engineering application, and long cultivation time, etc. Easy operation and shortened time

Active Publication Date: 2017-05-24
BEIJING UNIV OF TECH
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Problems solved by technology

The current method of forming anaerobic ammonium oxidation granular sludge is mainly by gradually changing the content of the influent matrix or reducing the hydraulic retention time (HRT), but most of the cultivation time is too long (165-210 days), which is not conducive to the application of practical projects. , and the formed anaerobic ammonium oxidation sludge has small particle size, loose structure and poor settling performance

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  • Method for rapidly forming anammox granule sludge

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Embodiment

[0033] Effect of signal molecules on the formation of anammox granular sludge when anaerobic granular sludge was used as inoculum sludge

[0034] Five groups of SBR reactors were set up, namely no signal molecule group, C7-HSL group, C8-HSL group, 3OC8-HSL group, and C10-HSL group. Among them, three SBR reactors are set up in each group of adding signal molecules, and the dosing concentration of signal molecules in each reactor is set to 500nM / L, 1000nM / L and 5000nM / L respectively (three kinds of signal molecules adopt dimethyl methylene The sulfone was dissolved first, and the concentrations of the prepared four signal molecule solutions were all 20 mg / mL). Add the same amount of anaerobic granular sludge to the five groups of reactors. During the acclimation stage of anaerobic granular sludge cultivation, the concentrations of ammonia nitrogen and nitrite nitrogen in the influent nutrient solution are controlled at about 50 mg / L, and different signals are added to the reacto...

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Abstract

The invention discloses a method for rapidly forming an anammox granule sludge, and belongs to the field of wastewater treatment. Proper amount of an inoculated sludge is added to an SBR (Sequencing Batch reactor), a nutrient solution containing ammonia nitrogen and nitrite is added, the concentrations of both ammonia nitrogen and nitrite in the nutrient solution are both 50 mg / L, an AHLs quorum sensing signal molecule at certain concentration is added into the nutrient solution in the SBR each day, the environment temperature is 32-33 DEG C, the pH value is 7.8-8.3, the DO concentration is 0.15 mg / L or lower, and batch cultivation is conducted. The time for forming the anammox granule sludge is short, and the effect of the granule sludge is good.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to an anammox denitrification technology commonly used in the wastewater treatment process, in particular to a method capable of rapidly forming anammox granular sludge. Background technique [0002] Anaerobic ammonium oxidation refers to the microbial reaction of ammonia nitrogen as electron donor and nitrite nitrogen as electron acceptor to oxidize ammonium salt under anaerobic conditions, and the final product is nitrogen and a small amount of nitrate nitrogen. Therefore, as a new technology for biological denitrification of wastewater, anaerobic ammonium oxidation has the advantages of saving oxygen consumption, no need to add organic carbon sources, low sludge output, and high matrix removal rate compared with traditional biological denitrification technologies, and has become a research topic at home and abroad. hotspot. However, the growth rate of anammox bacteria is slow, ...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 李军张晶赵白航卞伟李芸
Owner BEIJING UNIV OF TECH
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