Method for improving biofilm culturing efficiency of biofilter for treating high-nitrate wastewater

A biofilter, nitrate technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problems such as poor biofilm hanging effect, and achieve the solution of biofilm hanging film effect Poor, improve the impact load resistance and denitrification efficiency, and improve the effect of film formation efficiency

Pending Publication Date: 2020-12-11
光大水务科技发展(南京)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the existing biofilter has poor biofilm-hanging effect when treating high-nitrate wastewater, a method for improving the efficiency of biofilter to treat high-nitrate wastewater is provided, taking into account the characteristics of the biofilter and the actual situation of the project Add low-concentration activated sludge compound high-efficiency bacterial agents to the biofilter to improve the film-hanging efficiency of the biofilter when treating high-nitrate wastewater, shorten the start-up period of the biofilter, strengthen the biofilm, and improve impact resistance The purpose of load and denitrification efficiency is to solve the problem of poor biofilm hanging effect in the current biofilter when treating high nitrate wastewater

Method used

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  • Method for improving biofilm culturing efficiency of biofilter for treating high-nitrate wastewater
  • Method for improving biofilm culturing efficiency of biofilter for treating high-nitrate wastewater
  • Method for improving biofilm culturing efficiency of biofilter for treating high-nitrate wastewater

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Embodiment 1

[0049] A kind of method of the present invention improves the biofilter treatment high nitrate wastewater film-hanging efficiency, generally can be used for treating COD concentration is 50-500mg / L, nitrate nitrogen concentration is 50-150mg / L, total phosphorus concentration range is in 1-5mg / L, waste water at a temperature of 20°C-30°C. The present invention comprises the following steps:

[0050] S100. Expanding the Geobacter in the culture medium to obtain the Geobacter suspension A; when expanding the Geobacter, adding glutamic acid and glucose to the medium; wherein the final concentration of glutamic acid is 10 -30mg / L, the final concentration of glucose is 50-150mg / L; adding glutamic acid and other nutritional enhancers can make the obtained biofilm maintain high biological activity and nitrate nitrogen under the actual high-concentration nitrate wastewater conditions removal efficiency;

[0051] S200. Adaptive culture the Geobacter suspension A prepared in S100 in a ...

Embodiment 2

[0077] The specific content of this embodiment is the same as that of Embodiment 1, except that in this embodiment, the nitrate concentration in the treated wastewater is 50 mg / L. Furthermore, in the step S100, the final concentration of glutamic acid in the medium used for culturing is 10 mg / L, and the final concentration of glucose is 50 mg / L. In the S200 step, the OD value of Geobacter suspension A is 1.5, and the nutrient solution used for adaptive culture contains sodium alginate, 10mg / L glutamic acid, 50mg / L glucose and 50mg / L of sodium nitrate. In S300, the nutrient solution used contains 2% sodium alginate, 10mg / L glutamic acid, 50mg / L glucose and 50mg / L sodium nitrate, the concentration of nitrate in the wastewater used 50mg / L. In S400, the activated sludge with an initial concentration of 3000mg / L and the Geobacter suspension with an initial concentration of 3000mg / L are added to the water inlet tank, so that the activated sludge and Geobacter suspension in the was...

Embodiment 3

[0080] The specific content of this embodiment is the same as that of Embodiment 1, except that in this embodiment, the nitrate concentration in the treated wastewater is 150 mg / L. Furthermore, in the step S100, the final concentration of glutamic acid in the medium used for culturing was 30 mg / L, and the final concentration of glucose was 150 mg / L. In the S200 step, the OD value of Geobacter suspension A is 3, and the nutrient solution used for adaptive culture contains sodium alginate, 30mg / L glutamic acid, 150mg / L glucose and 150mg / L of sodium nitrate. In S300, the nutrient solution used contains 5% sodium alginate, 30mg / L glutamic acid, 150mg / L glucose and 150mg / L sodium nitrate, the concentration of nitrate in the wastewater used It is 150mg / L. In S400, the activated sludge with an initial concentration of 4000mg / L and the Geobacter suspension with an initial concentration of 4000mg / L are added to the water inlet tank, so that the activated sludge and Geobacter suspensi...

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Abstract

The invention discloses a method for improving biofilm culturing efficiency of a biological filter for treating high-nitrate wastewater, and belongs to the technical field of wastewater treatment. Themethod comprises the following operation steps of: 1, carrying out amplification culture and high-nitrate wastewater adaptability culture on geobacterium; 2, synchronously adding the cultured geobacillus and low-concentration activated sludge into a biological filter according to an equal mass ratio, and carrying out biofilm culturing; and 3, maintaining continuous water inflow of the biologicalfilter until biofilm culturing is completed. According to the invention, the abundance and bacterial extracellular polymeric substances of the geobacillus are increased by carrying out high-nitrate adaptability culture on the geobacillus and adding the cultured geobacillus into the reactor, and the growth speed, microbial activity and viscosity of microorganisms are improved, so that the biofilm culturing efficiency of the biofilter for treating the high-nitrate wastewater is improved; and the formed biological film is firm and high in impact load resistance, and has an excellent wastewater treatment effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for improving the membrane-hanging efficiency of a biological filter for treating high-nitrate wastewater. Background technique [0002] The bioactive filter is to set a certain height of filler in the reactor, and use the filler and the microorganisms attached to it as the treatment medium to achieve biodegradation and adsorption, physical filtration and adsorption of pollutants in the sewage. At present, bioactive filters for sewage treatment include different types of reactors such as bioactive filters, trickling filters, V-shaped filters, and sand filters. Bioactive filters are simple in operation and management, small in floor space, and low in construction costs. , less sludge generation and other advantages, has been widely used in sewage treatment. [0003] The biofilter is started by natural water inflow and film formation or adding activated sludge to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/12C02F101/16C02F101/30
CPCC02F3/34C02F3/12C02F2101/30C02F2101/163Y02W10/10
Inventor 张志超牛涛张江生许加俊
Owner 光大水务科技发展(南京)有限公司
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