Application method of sulfur autotrophic denitrification biological carrier in anoxic tank

Abstract

The invention discloses an application method of a sulfur autotrophic denitrification biological carrier in an anoxic tank. The invention relates to the technical field of microbiological water treatment. The invention aims to solve a series of problems caused by low mass transfer effect when a sulfur autotrophic denitrification technology is applied. The technical scheme provided by the inventionis as follows: a filler unit assembly is filled with the sulfur autotrophic denitrification biological carrier to form filler units, n groups of the filler units are arranged in each anoxic tank, each group of filler units comprises m filler units, and m and n are positive integers not less than 1; the filler units in the same group are connected in series, and the adjacent filler units are connected with each other through ropes; each group of filler units is fixed at the bottom of the anoxic tank or suspended on a buoy or a truss by connecting the filler units at the head / tail positions inseries, so that the filler units are dispersed in the anoxic tank. By using the method provided by the invention, the denitrification efficiency of the anoxic tank can be greatly improved.

Description

technical field

[0001] The invention relates to the technical field of microbial water treatment, in particular to an application method of a sulfur autotrophic denitrification biological carrier in an anoxic pool. Background technique

[0002] In recent years, with the rapid development of my country's economy, the increasingly developed industrial and agricultural production systems, and the rapid improvement of people's living standards, the discharge of nutrients such as nitrogen and phosphorus into water bodies is also increasing, causing algae outbreaks and water quality deterioration. A series of problems have led to the destruction of the stability of the water ecosystem, seriously affecting the safety of urban water supply and drinking water. In order to reduce the negative impact of treated sewage discharge on the water environment quality of receiving water bodies, it is urgent to carry out advanced treatment of nitrogen and phosphorus in municipal sewage. [0003...

Examples

preparation example 1

[0033] Preparation example 1 Preparation of sulfur autotrophic denitrification biological carrier

[0034] Mix the sulfur source and the common carrier according to the required ratio, ball mill, heat treatment under the protection of argon, and mix with the inert carrier evenly after cooling. The ball milling time is 2h; the heating rate of heat treatment is 15°C / min, the heat treatment temperature is 150°C, and the heat treatment time is 20min.

[0035]The above-mentioned sulfur source is pyrite, the common carrier is limestone, and the inert carrier is silicon dioxide. The particle size of ordinary carrier and inert carrier is 5-10mm, both of ordinary carrier and inert carrier are porous structure, with large pores > 10um, pore volume distribution > 70%; 2 ~ 50nm mesopores, pore volume distribution > 10%; 600 BET 2 / g. The mass ratio of the common carrier to the inert carrier is 2:1, and the mass ratio of the sulfur element in the sulfur source to the mass of the common c...

preparation example 2

[0036] Preparation example 2 Preparation of sulfur autotrophic denitrification biological carrier

[0037] Mix the sulfur source and the common carrier according to the required ratio, ball mill, heat treatment under the protection of argon, and mix with the inert carrier evenly after cooling. The ball milling time is 3h; the heating rate of heat treatment is 10°C / min, the heat treatment temperature is 200°C, and the heat treatment time is 30min.

[0038] The above-mentioned sulfur source is pyrite, the common carrier is limestone, and the inert carrier is silicon dioxide. The particle size of ordinary carrier and inert carrier is 10-30mm, both of ordinary carrier and inert carrier are porous structure, with large pores > 10um, pore volume distribution > 70%; 2 ~ 50nm mesopores, pore volume distribution > 10%; 600 BET 2 / g. The mass ratio of the common carrier to the inert carrier is 3.5:1, and the mass ratio of the sulfur element in the sulfur source to the mass of the comm...

Embodiment 1

[0039] Example 1 Application of a sulfur autotrophic denitrification biological carrier in anoxic ponds

[0040] This example is applied to the treatment of domestic sewage in a community in Beijing. The sulfur autotrophic denitrification biological carrier prepared in Preparation Example 1 is added to the spherical reticulated shell. The amount of biological carrier added is calculated according to the following method. The filling of a single spherical reticulated shell The volume percentage is 50%.

[0041] The usage calculation method is as follows:

[0042]

[0043] in, is the safety factor of the amount of biological carrier, which is a constant, Choose 1.3; As the benchmark dosage, it is a constant, 80 kg / m 3 ; is the influent total nitrogen concentration; is the concentration of organic matter in water; is the hydraulic retention time of the anoxic pond; to consume time; is the sludge concentration in the anoxic pond; for unit concentration. ...

technical field

[0001] The invention relates to the technical field of microbial water treatment, in particular to an application method of a sulfur autotrophic denitrification biological carrier in an anoxic pool. Background technique

[0002] In recent years, with the rapid development of my country's economy, the increasingly developed industrial and agricultural production systems, and the rapid improvement of people's living standards, the discharge of nutrients such as nitrogen and phosphorus into water bodies is also increasing, causing algae outbreaks and water quality deterioration. A series of problems have led to the destruction of the stability of the water ecosystem, seriously affecting the safety of urban water supply and drinking water. In order to reduce the negative impact of treated sewage discharge on the water environment quality of receiving water bodies, it is urgent to carry out advanced treatment of nitrogen and phosphorus in municipal sewage. [0003...

Examples

preparation example 1

[0033] Preparation example 1 Preparation of sulfur autotrophic denitrification biological carrier

[0034] Mix the sulfur source and the common carrier according to the required ratio, ball mill, heat treatment under the protection of argon, and mix with the inert carrier evenly after cooling. The ball milling time is 2h; the heating rate of heat treatment is 15°C / min, the heat treatment temperature is 150°C, and the heat treatment time is 20min.

[0035]The above-mentioned sulfur source is pyrite, the common carrier is limestone, and the inert carrier is silicon dioxide. The particle size of ordinary carrier and inert carrier is 5-10mm, both of ordinary carrier and inert carrier are porous structure, with large pores > 10um, pore volume distribution > 70%; 2 ~ 50nm mesopores, pore volume distribution > 10%; 600 BET 2 / g. The mass ratio of the common carrier to the inert carrier is 2:1, and the mass ratio of the sulfur element in the sulfur source to the mass of the common c...

preparation example 2

[0036] Preparation example 2 Preparation of sulfur autotrophic denitrification biological carrier

[0037] Mix the sulfur source and the common carrier according to the required ratio, ball mill, heat treatment under the protection of argon, and mix with the inert carrier evenly after cooling. The ball milling time is 3h; the heating rate of heat treatment is 10°C / min, the heat treatment temperature is 200°C, and the heat treatment time is 30min.

[0038] The above-mentioned sulfur source is pyrite, the common carrier is limestone, and the inert carrier is silicon dioxide. The particle size of ordinary carrier and inert carrier is 10-30mm, both of ordinary carrier and inert carrier are porous structure, with large pores > 10um, pore volume distribution > 70%; 2 ~ 50nm mesopores, pore volume distribution > 10%; 600 BET 2 / g. The mass ratio of the common carrier to the inert carrier is 3.5:1, and the mass ratio of the sulfur element in the sulfur source to the mass of the comm...

Embodiment 1

[0039] Example 1 Application of a sulfur autotrophic denitrification biological carrier in anoxic ponds

[0040] This example is applied to the treatment of domestic sewage in a community in Beijing. The sulfur autotrophic denitrification biological carrier prepared in Preparation Example 1 is added to the spherical reticulated shell. The amount of biological carrier added is calculated according to the following method. The filling of a single spherical reticulated shell The volume percentage is 50%.

[0041] The usage calculation method is as follows:

[0042]

[0043] in, is the safety factor of the amount of biological carrier, which is a constant, Choose 1.3; As the benchmark dosage, it is a constant, 80 kg / m 3 ; is the influent total nitrogen concentration; is the concentration of organic matter in water; is the hydraulic retention time of the anoxic pond; to consume time; is the sludge concentration in the anoxic pond; for unit concentration. ...

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