Immobilized nitrobacteria enrichment culture method and device in sewage treatment process

A technology of enrichment culture and sewage treatment, which is applied in the field of culture equipment and enrichment culture immobilized nitrifying bacteria, which can solve the problems of low organic matter content, no mention of the type and content of nitrifying bacteria, easy loss, etc.

Active Publication Date: 2015-10-07
BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

CN103319000A discloses a preparation method of a low-temperature-resistant autotrophic nitrifying bacteria agent, using low-temperature activated sludge as raw material, the medium is composed of sodium acetate, ammonium chloride, calcium chloride, and buffer, cultivated at 10°C, rich in The collected nitrifying bacteria agent is not fixed on the carrier, and the type and content of the cultured nitrifying bacteria are not mentioned
CN102559489A discloses a method for rapidly enriching ammonia oxidizing bacteria, using domestic sewage activated sludge as raw material,

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  • Immobilized nitrobacteria enrichment culture method and device in sewage treatment process
  • Immobilized nitrobacteria enrichment culture method and device in sewage treatment process
  • Immobilized nitrobacteria enrichment culture method and device in sewage treatment process

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Embodiment 1

[0054] An immobilized nitrifying bacteria culture device, comprising a culture solution storage tank 1 equipped with enriched culture solution, an alkali-adding barrel 4 equipped with a pH regulator, a nitrifying bacteria culture reactor 11 and a programmable process controller (ie PLC) 29. The culture solution storage tank and the alkali-adding barrel are respectively connected to the nitrifying bacteria cultivation reactor through the water inlet pipe 3 and the alkali-adding pipe 6. The water inlet pipe and the alkali-adding pipe are respectively provided with an inlet pump 2 and an alkali-adding pump 5; The inner bottom of the reactor is provided with an aeration pipe 9, and an aeration head 10 is arranged on the aeration pipe, and the entrance of the aeration pipe is connected with the blower 7 outside the nitrifying bacteria cultivation reactor, and an air inlet valve 8 is installed on the aeration pipe , to adjust the air intake of the air blower; the nitrifying bacteria ...

Embodiment 2

[0069] The device of this embodiment and the using method of the device are all the same as in embodiment 1, and the method comprises the following steps:

[0070] (1) Inoculation of dewatered sludge: in a total volume of 2.2m 3 , working volume is 1.8m 3 Inoculate the dewatered sludge in the dehydration machine room of the urban sewage treatment plant in the nitrifying bacteria culture reactor, and the volatile sludge concentration of the dehydrated sludge after inoculation is 2500mg / L;

[0071] (2) Preparation of enriched culture medium: NH 4 HCO 3 NH is formulated with pretreated municipal sewage 4+ -N concentration of 100, 300, 500, 700, 1000mg / L enriched culture solution; different NH 4 + The chemical oxygen demand (COD) of the enriched culture solution with -N concentration is 45-55mg / L;

[0072] (3), the cultivation of immobilized nitrifying bacteria, the membrane-hanging acclimation culture stage (the temperature is 10~14 ℃, the culture time is 30 days) and the e...

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Abstract

The invention discloses an immobilized nitrobacteria enrichment culture method and device in a sewage treatment process. A sequencing-batch biomembrane activated sludge process is utilized to perform enrichment culture on nitrobacteria: dewatered sludge is inoculated in an immobilized nitrobacteria culture device, and an enrichment culture solution is added; and in the nitrobacteria enrichment culture process, the biomembrane ammonia nitrogen load is gradually enhanced, and the pH value is controlled. The enrichment culture solution is formed by mixing NH4HCO3 and pretreated municipal sewage, the ammonia nitrogen concentrations are respectively 100, 300, 500, 700 and 1000 mg/L, and the COD (chemical oxygen demand) concentration is 30-60 mg/L. By controlling the immobilized nitrobacteria culture device, the DO in the reaction mixture is 2-6 mg/L, the pH value is 6.5-8.0, the biofilm-formation acclimatization culture temperature is 10-14 DEG C, and the enrichment purification culture temperature is 15-25 DEG C. The device can be used for culturing nitrobacteria at low temperature, and the nitrobacteria content is up to 40-45%. The immobilized nitrobacteria have high low-temperature nitration resistance, and can treat the wastewater of which the ammonia nitrogen concentration is up to 1000 mg/L, so that the ammonia nitrogen in the wastewater is lowered to 1.0 mg/L or below.

Description

technical field [0001] The invention relates to a method for enriching and cultivating immobilized nitrifying bacteria in a sewage treatment process, and a cultivating device used in the cultivating method. The cultured immobilized nitrifying bacteria can not only be directly used to treat industrial wastewater with high ammonia nitrogen concentration, but also can be used for the upgrading of traditional activated sludge sewage treatment plants, which belongs to the field of sewage treatment. Background technique [0002] With the rapid development of my country's economy, a large amount of domestic sewage and industrial wastewater are directly discharged into various water bodies. Although the environmental supervision mechanism is becoming more and more perfect, the problem of water pollution in my country is still not optimistic, which affects the sustainable development of the economy to a certain extent. [0003] Biological denitrification of sewage is currently the mo...

Claims

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Application Information

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IPC IPC(8): C12N1/20C12M1/38C12M1/36C12M1/34C12M1/04
Inventor 顾升波李振川李艺戴前进邵辉煌
Owner BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
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