Adjustable biological treatment system and method for wastewater

A biological treatment, adjustable technology, applied in water/sludge/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve problems such as small adjustable range

Pending Publication Date: 2021-04-20
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the publication number CN111153498A provides an adjustable backflow device suitable for sewage integrated wastewater treatment equipment, including a pool body and internal partitions, and the partition divides the interior of the pool body into different functional areas. Use the flow adjustment mechanism to adjust the flow and proportion of water entering different functional areas. The flow adjustment device is mainly an adjustable valve, but its adjustable range is small and only realizes the adjustment of the return flow.

Method used

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  • Adjustable biological treatment system and method for wastewater
  • Adjustable biological treatment system and method for wastewater
  • Adjustable biological treatment system and method for wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The industrial park accepts sewage, and the incoming water is mainly non-toxic industrial wastewater and some domestic sewage. The industrial wastewater is 1500m 3 / d, domestic sewage 900m 3 / d, the designed influent water quality is pH6~9, BOD 5 :300mg / L,COD Cr : 500mg / L, SS: 400mg / L, the discharge standard is GB18918-2002 Grade A standard, considering the design margin, the design treatment water volume is 3000m 3 / d adjustable residence time biological treatment device, when the water level is full, the hydraulic retention time of the hydrolysis tank is 6h, the residence time of the anoxic tank is 6h, the residence time of the aerobic tank is 24h, the hydraulic retention time ratio, the hydrolysis tank: the anoxic tank : Aerobic tank = 1:1:4, the hydrolysis tank is set with 3 compartments, the flow of the 3 compartments is up and down baffle, 47% of its volume is suspended with combined packing, the spacing of the combined packing is 200mmX200mm, the anoxic pool is...

Embodiment 2

[0041] The adjustable wastewater biological treatment process and method are used for experimental research on the treatment of various industrial wastewater. When the water level is full, the water intake is adjusted to 1m 3 / h, the hydraulic retention time of the hydrolysis pool, anoxic pool, and aerobic pool are 6h, 6h, and 18h, respectively, and are used to treat poplar APMP chemical pulp wastewater. After sedimentation, the wastewater index is: COD cr :6700mg / L, BOD 5 : 2400mg / L, pH: 7.93, NH 4 +-N: 18mg / L, TN: 32mg / L, because the N content in the waste water is not high, therefore, the backflow of the mixed liquid and the sludge backflow are canceled, the anoxic pool is equivalent to the hydrolysis pool, and the water inflow is reduced to 0.75m 3 / h, at this time, the hydraulic retention time of the hydrolysis pool, anoxic pool, and aerobic pool are respectively 16h, 0h, and 24h, which strengthens the hydrolysis and aerobic effects, and the effluent COD after treatment...

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Abstract

The invention discloses an adjustable biological treatment system and method for wastewater. The adjustable biological treatment system comprises a hydrolysis tank, an anoxic tank, an aerobic tank and a sedimentation tank which are connected in sequence, wherein the hydrolysis tank is connected with a water inlet of the anoxic tank through a first effluent weir assembly; the anoxic tank is connected with a water inlet of the aerobic tank through a second effluent weir assembly; and the first effluent weir assembly and the second effluent weir assembly are the same in structure. According to the invention, the effluent weir assemblies are arranged between the hydrolysis tank and the anoxic tank and between the anoxic tank and the aerobic tank, so water levels in the hydrolysis tank and the anoxic tank can be continuously adjusted from a full water level to a 1 / 4 full water level, and meanwhile, the adjustment range of an effective volume ratio of the hydrolysis tank to the anoxic tank is larger. Therefore, the system is applicable to wastewater with greatly changed water quality and water quantity, can still maintain normal operation under different working conditions, and is resistant to impact load; and key technological parameters can be adjusted according to the requirements of different water qualities, so treatment effect can be optimized.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to an adjustable wastewater biological treatment system and wastewater treatment method, which can be used to adjust the process to adapt to the sewage biological treatment process in municipal, forestry, printing and dyeing, papermaking, pharmaceutical and other industries. Changes in water quality and quantity. Background technique [0002] The most important method of wastewater treatment is biological treatment, that is, to take certain artificial measures to create an environment conducive to the growth and reproduction of microorganisms, to obtain a large number of microorganisms with high biological activity, and to use these microorganisms to decompose and oxidize organic matter. Wastewater biological treatment There are two types of anaerobic biological treatment to ensure anaerobic environment and aerobic biological treatment with aerati...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16C02F101/30C02F101/38
Inventor 盘爱享房桂干田庆文邓拥军沈葵忠丁来保张华兰冉淼
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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