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Method for biochemical treatment of sewage by powder enhanced SBR method

A technology of biochemical treatment and powder, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of inability to achieve sewage treatment effect, poor nitrogen and phosphorus removal effect, and eutrophication of water body to achieve the effect of dense sludge, fast settling rate and strong adaptability

Inactive Publication Date: 2020-04-21
TONGJI UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] SBR treatment process is a kind of sewage treatment process that is very commonly used in recent years. SBR is the abbreviation of Sequencing Batch Reactor Activated Sludge Process (Sequencing Batch Reactor Activated Sludge Process). Treatment technology, which is a wastewater biological treatment activated sludge process based on suspended microorganisms degrading organic matter, ammonia nitrogen and other pollutants under aerobic conditions. The growth environment is a wastewater treatment process widely recognized and used in the world. It has the characteristics of cost saving and high organic matter removal efficiency. It can also carry out nitrification and denitrification processes at different times in the same reactor to complete the denitrification process. However, there are still many technical problems in the existing SBR treatment process: the removal effect of nitrogen and phosphorus in the SBR treatment process is poor, if it is directly discharged into the environment without treatment, it is easy to cause eutrophication of the water body, and the maximum sewage treatment cannot be achieved The purpose of the effect; part of the SBR treatment process does not set an idle stage, so the activated sludge that has been treated in the sewage needs to be discharged out of the SBR tank every time, and the SBR tank located underground requires additional extraction equipment to extract the activated sludge for treatment. At the same time, the underground SBR pool also has the problem that the treated sewage needs to be extracted by extraction equipment at the same time, which causes waste of resources and requires additional space for placing equipment, etc.

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  • Method for biochemical treatment of sewage by powder enhanced SBR method

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Effect test

Embodiment 1

[0035] Diatomaceous earth is used as the powder carrier for microbial loading, and the device process is "SBR process + powder enhanced biochemical water treatment" to treat general urban sewage, COD = 120mg / L, TN = 25mg / L, and the enhanced denitrification effect is required. The total nitrogen was steadily reduced to 10mg / L. The total effective volume of the designed SBR original device is 14m 3 , dosing according to the powder carrier dosage concentration of 2g / L, the steps are as follows:

[0036] (1) The calculated amount of diatomaceous earth to be added is 30kg. Grind the diatomite ore with a 300-mesh sieve, and sieve 30kg of diatomite, soak the diatomite in raw sewage water for more than 12 hours, so that the diatomite will no longer agglomerate and float;

[0037] (2) Since the pH of the slurry will drop sharply after adding diatomite, other alkaline substances such as fly ash or sodium hydroxide can be added to restore the pH of the slurry to the range of 7-7.3;

...

Embodiment 2

[0044] It is intended to use diatomite as the powder carrier for microbial loading, and improve the original SBR process to "SBR process + powder enhanced biochemical water treatment" process. The total effective volume in the device is measured to be 8m 3 , dosing according to the powder carrier dosage concentration of 3g / L, the steps are as follows:

[0045] (1) The calculated diatomite required to add is 24kg, and 24kg diatomite is obtained by sieving with a 250 mesh sieve;

[0046] (2) Add diatomaceous earth directly to an effective volume of 8m 3 In the cylindrical SBR equipment, in the case of clear water, turn on the mixer and aeration equipment to evenly distribute the diatomite into the cylindrical equipment, and at the same time make the diatomite completely absorb moisture, and there are no floating particles on the liquid surface. Generally, the dissolved oxygen is controlled The concentration is 2mg / L, and it lasts for 2 hours;

[0047] (3) Turn off the aeration...

Embodiment 3

[0051] It is intended to use activated carbon as the powder carrier for microbial loading, and the device process is "SBR process + powder enhanced biochemical water treatment", and the total effective volume of the structure is measured to be 500m 3 , dosing according to the powder carrier dosage concentration 4g / L, the steps are as follows:

[0052] (1) Calculate the required dosage of activated carbon to be 2000kg, use a 250-mesh sieve to obtain 120kg of activated carbon, and soak the activated carbon in water for more than 12 hours until it absorbs moisture completely;

[0053] (2) Add activated carbon directly to an effective volume of 500m 3 In the structure, the mixer and aeration equipment are turned on to distribute the activated carbon evenly into the cylindrical equipment. Due to the large dosage, it can be placed at multiple points to facilitate the uniform distribution of activated carbon. Generally, the concentration of dissolved oxygen should be controlled at 2...

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Abstract

The invention relates to a method for biochemical treatment of sewage by a powder enhanced SBR method. The method comprises the following steps: selecting a proper powder carrier, removing impuritieswith larger particle sizes, and adding water or wastewater to prepare a slurry from the powder carrier, so that the powder carrier completely absorbs moisture and does not agglomerate or float upwardsany more; adjusting the pH value of the soaked powder slurry to be proper; adding the powder slurry subjected to complete soaking and moisture absorption into a bioreactor or a biological reaction structure, so that the added powder carrier is uniformly distributed into the bioreactor; wrapping the surface of the powder carrier with the microorganisms in the bioreactor through the adhesion effectto form biological flocs with precipitated nucleuses; and finally making the microorganism powder particles pass through a biological reaction area, precipitating in a precipitation section, separating the powder carrier and the microorganisms from the discharged sludge, and recycling, so that the cyclic utilization of the powder carrier is achieved. According to the invention, the removal efficiency of degradation-resistant substances in sewage is improved, and the effluent quality is improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method for biochemical treatment of sewage by powder strengthening SBR method. Background technique [0002] At present, with the rapid development of industry and agriculture, the sewage generated in life has increased sharply, and the pollutants that need to be treated in water are increasing day by day, and there are various types. Due to the backwardness of my country's pipe network construction, there is still a part of sewage that has not been connected to the sewage pipe. If the sewage is received into the sewage plant in the later stage, it will inevitably increase the operating pressure of the sewage plant. With the deterioration of the environment and the increasing attention of human beings to the living environment, the discharge standards of sewage plants continue to increase. However, due to the limited design load of the sewage plant, it is impossible to receive ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/12
CPCC02F3/104C02F3/1263Y02W10/10
Inventor 柴晓利陆斌戴晓虎武博然汪秀仲
Owner TONGJI UNIV
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