Method for quickly starting short-cut nitrification and denitrification of ammonia-containing wastewater

Abstract

The invention discloses a method for quickly starting short-cut nitrification and denitrification of ammonia-containing wastewater. The method includes the steps: (1) putting denitrified activated sludge into a bioreactor; and (2) starting by a way of batch water feeding and gradual increase of the fed water ammonia-nitrogen concentration, and adding an ammonia oxidizing bacteria growth promoter, wherein the ammonia oxidizing bacteria growth accelerator includes 40 to 100 parts by weight of metal salts, 5 to 30 parts by weight of a polyamine substance, 0.05 to 1.5 parts by weight of inorganic acid hydroxylamine and 10 to 40 parts by weight of Na2SO3, the metal salts comprise a calcium salt, a ferrous salt and a copper salt, and the molar ratio of Ca<2+> to Fe<2+> to Cu<2+> is (5-15) to (1-8) to (0.5-5); and (3) when the fed water ammonia-nitrogen concentration reaches 400 to 700 mg / L, changing the mode into a mode of continuous water feeding, continuing to add the growth promoter, and when the ammonia-nitrogen removal rate is more than 90% and the nitrosation rate reaches 80%, starting to add a denitrification inoculum. The method can quickly start short-cut nitrification and denitrification process in a short time, and has the advantages of short starting time and high total nitrogen removal rate.

Description

technical field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a rapid start-up method for short-range nitrification and denitrification of ammonia-containing wastewater. Background technique

[0002] As an important research direction of water pollution control, biological denitrification of wastewater has undergone a process from mature traditional biological denitrification to new biological denitrification. The new biological denitrification process provides a feasible way for the treatment of low COD (chemical oxygen demand, an indicator of carbon source content, COD value is measured by Cr method in this application) high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing energy consumption, saving carbon sources, and reducing sludge production, and has become one of the hotspots in the field of wastewate...

Examples

Embodiment 1

[0026] The preparation of embodiment 1 ammonia oxidizing bacteria growth promoter

[0027] The preparation method of the ammonia oxidizing bacteria growth promoter of the present invention is as follows: (1) prepare the metal salt solution according to the following composition and parts by weight: the metal salt is 40 to 100 parts by weight, preferably 50 to 80 parts by weight, and the metal salt is Calcium salt, ferrous salt and copper salt, Ca in metal salt 2+ , Fe 2+ and Cu 2+ The molar configuration ratio is (5~15):(1~8):(0.5~5), preferably (8~12):(2~6):(1~4); (2) combine 10~40 Parts by weight, preferably 20 to 30 parts by weight Na 2 SO 3 (3) Add 5-30 parts by weight, preferably 10-20 parts by weight, of polyamines and 0.05-1.5 parts by weight, preferably 0.1-1.0 parts by weight, of inorganic acid hydroxylamine before use into the metal salt solution.

[0028] Four types of accelerators were prepared according to the ratio and formula of the accelerators in Table 1...

Embodiment 2

[0031] The preparation of embodiment 2 denitrification bacteria agent

[0032] (1) Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 were respectively inoculated on beef extract peptone solid medium and activated in a constant temperature incubator at a temperature of 30°C. The medium formula was: beef extract: 5g / L , Peptone: 10g / L, NaNO 2 : 1g / L, add 2.0% agar.

[0033] (2) Scrape a ring of solid bacteria with an inoculation loop to inoculate in the beef extract peptone liquid culture solution, and culture under aerobic conditions at a temperature of 25~35°C and 150~240rpm for 1~3 days until the logarithmic growth phase, and obtain a liquid Bacteria agent seed solution; medium formula: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L.

[0034] (3) The above-mentioned Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 seed liquids were combined according to the two ratios of 1:1 and 1:2 to carry out amplified culture in a reactor with a good stirring system, and the T...

Embodiment 3

[0036] The start-up effect of embodiment 3 different accelerants and different bacterial agents

[0037] Take five reactors No. 1 to No. 5 with the same volume, inoculate the remaining activated sludge of a sewage treatment plant according to the MLSS after inoculation of 2.0g / L, and dilute the high-ammonia wastewater from a catalyst plant to 250mg / L as the reactor For water intake, the pH is controlled at 8.2; the temperature is controlled at 30°C; the dissolved oxygen concentration is 3.0~3.5mg / L. Water is fed intermittently first, while the water is fed, according to the accelerator concentration 2mg / L in the sewage, the accelerator of embodiment 1 is added respectively to the No. 1-4 reactor, the ventilation is stopped after 24 hours of reaction, and the supernatant is removed after natural settlement. Leave the bacteria, and then add new ammonia-containing wastewater to the reactor. When the ammonia nitrogen removal rate reaches 80%, reduce the dilution factor of the orig...

technical field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a rapid start-up method for short-range nitrification and denitrification of ammonia-containing wastewater. Background technique

[0002] As an important research direction of water pollution control, biological denitrification of wastewater has undergone a process from mature traditional biological denitrification to new biological denitrification. The new biological denitrification process provides a feasible way for the treatment of low COD (chemical oxygen demand, an indicator of carbon source content, COD value is measured by Cr method in this application) high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing energy consumption, saving carbon sources, and reducing sludge production, and has become one of the hotspots in the field of wastewate...

Examples

Embodiment 1

[0026] The preparation of embodiment 1 ammonia oxidizing bacteria growth promoter

[0027] The preparation method of the ammonia oxidizing bacteria growth promoter of the present invention is as follows: (1) prepare the metal salt solution according to the following composition and parts by weight: the metal salt is 40 to 100 parts by weight, preferably 50 to 80 parts by weight, and the metal salt is Calcium salt, ferrous salt and copper salt, Ca in metal salt 2+ , Fe 2+ and Cu 2+ The molar configuration ratio is (5~15):(1~8):(0.5~5), preferably (8~12):(2~6):(1~4); (2) combine 10~40 Parts by weight, preferably 20 to 30 parts by weight Na 2 SO 3 (3) Add 5-30 parts by weight, preferably 10-20 parts by weight, of polyamines and 0.05-1.5 parts by weight, preferably 0.1-1.0 parts by weight, of inorganic acid hydroxylamine before use into the metal salt solution.

[0028] Four types of accelerators were prepared according to the ratio and formula of the accelerators in Table 1...

Embodiment 2

[0031] The preparation of embodiment 2 denitrification bacteria agent

[0032] (1) Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 were respectively inoculated on beef extract peptone solid medium and activated in a constant temperature incubator at a temperature of 30°C. The medium formula was: beef extract: 5g / L , Peptone: 10g / L, NaNO 2 : 1g / L, add 2.0% agar.

[0033] (2) Scrape a ring of solid bacteria with an inoculation loop to inoculate in the beef extract peptone liquid culture solution, and culture under aerobic conditions at a temperature of 25~35°C and 150~240rpm for 1~3 days until the logarithmic growth phase, and obtain a liquid Bacteria agent seed solution; medium formula: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L.

[0034] (3) The above-mentioned Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 seed liquids were combined according to the two ratios of 1:1 and 1:2 to carry out amplified culture in a reactor with a good stirring system, and the T...

Embodiment 3

[0036] The start-up effect of embodiment 3 different accelerants and different bacterial agents

[0037] Take five reactors No. 1 to No. 5 with the same volume, inoculate the remaining activated sludge of a sewage treatment plant according to the MLSS after inoculation of 2.0g / L, and dilute the high-ammonia wastewater from a catalyst plant to 250mg / L as the reactor For water intake, the pH is controlled at 8.2; the temperature is controlled at 30°C; the dissolved oxygen concentration is 3.0~3.5mg / L. Water is fed intermittently first, while the water is fed, according to the accelerator concentration 2mg / L in the sewage, the accelerator of embodiment 1 is added respectively to the No. 1-4 reactor, the ventilation is stopped after 24 hours of reaction, and the supernatant is removed after natural settlement. Leave the bacteria, and then add new ammonia-containing wastewater to the reactor. When the ammonia nitrogen removal rate reaches 80%, reduce the dilution factor of the orig...

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