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MBBR (Moving Bed Biofilm Reactor) high-standard sewage treatment system and treatment process

A sewage treatment system and sewage treatment technology, applied in the field of MBBR sewage treatment, can solve the problems of poor phosphorus and phosphorus removal effects, achieve the effects of reducing energy consumption, good effect, and reducing the demand for dissolved oxygen

Active Publication Date: 2018-09-28
QINGDAO SPRING WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] How to solve the problem of poor phosphorus and phosphorus removal effect due to the limitation of VFA content in the influent carbon source and the competition of nitrogen denitrification for carbon source through reasonable functional area setting and reflux setting; and let aerobic accumulation The process of phosphorus can be realized in the anoxic zone containing molecular oxygen nitrate nitrogen, that is to say, how to use the characteristics of DPB, the phosphorus in the sewage can be transferred to the sludge after passing through the anoxic zone, allowing The sedimentation tank can be set at the rear end of the anoxic section for mud-water separation instead of being set after the aerobic tank

Method used

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  • MBBR (Moving Bed Biofilm Reactor) high-standard sewage treatment system and treatment process

Examples

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Effect test

Embodiment 1

[0075] The effluent of the primary sedimentation tank of an urban sewage treatment plant is used as the system inflow, with a water volume of 7.8m 3 / h, pH average 6.90, influent COD concentration 150-350mg / L, BOD concentration 70-175mg / L, TN concentration 40-55mg / L, ammonia nitrogen concentration 30-45mg / L, TP concentration 2-6mg / L, SS The concentration is 130-250mg / L. High-efficiency sewage treatment process The residence time of the anaerobic zone is 1.5h; the anoxic zone 1 is 1.5h; the anoxic zone 2 is 1.5h; the surface load of the sedimentation zone is 8m 3 / m 2 / h; the residence time in the biofilm area is 2.5h, and the specific surface area of ​​the suspension carrier used is 800m 2 / m 3 , The filling rate is 45%; the residence time of the buffer zone is 0.1h; the residence time of the denitrification filter area is 0.9h.

[0076] During operation, the reflux ratio of the nitrification liquid from the buffer zone to the anoxic zone 1 is 200%, the reflux ratio from th...

Embodiment 2

[0080] The effluent from the regulating tank of a school sewage treatment station is used as the system inflow, with a water volume of 4.8m 3 / h, average pH 6.90, influent COD concentration 200-400mg / L, BOD concentration 80-150mg / L, TN concentration 45-60mg / L, ammonia nitrogen concentration 20-40mg / L, TP concentration 3-8mg / L, SS The concentration is 150-250mg / L. The residence time in the anaerobic zone is 1.5h; the anoxic zone 1 is 1.0h; the anoxic zone 2 is 1.5h; the surface load in the sedimentation zone is 8m 3 / m 2 / h; the residence time in the biofilm area is 3h, and the specific surface area of ​​the suspension carrier used is 800m 2 / m 3 , The filling rate is 40%; the residence time of the buffer zone is 0.1h; the residence time of the denitrification filter area is 0.9h.

[0081] During operation, the reflux ratio of the nitrifying liquid from the biofilm area to the anoxic zone 1 is 200%, the reflux ratio from the anoxic zone 2 to the anaerobic zone is 150%, and ...

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Abstract

The invention discloses an MBBR (Moving Bed Biofilm Reactor) high-standard sewage treatment system and a treatment process and belongs to the technical field of sewage treatment. The problems in the prior art that a treatment process of the traditional sewage treatment plant is high in effluent TN concentration, low in integration level, low in load, high in carbon source requirement and common ineffect of removing nitrogen, phosphorus and SS are solved. The sewage treatment system comprises an anaerobic zone, an anoxic zone I, an anoxic zone II, a flocculation zone, a settling zone, a biofilm zone, a buffer zone, a denitrification filter zone, an effluent zone and pipelines for connecting the zones. According to operations of adjusting reflux, controlling the sludge concentration, setting parameters of the suspended carrier filling rate in the biofilm zone and DO, setting the carbon source addition amount and backwash frequency in the denitrification filter zone and the like, by utilizing the characteristic of denitrifying phosphate-accumulating organisms, the settling zone is arranged on a middle section of biochemical treatment, the biofilm process is coupled to the denitrification filter process, and the sewage treatment system disclosed by the invention has the advantages that the integration level is high, nitrogen and phosphorus can be synchronously removed, the carbonsource is saved, the concentrations of the nitrogen, phosphorus and SS in the effluent are low, the load is high, and the operation is simple.

Description

technical field [0001] The invention relates to the technical field of MBBR sewage treatment, in particular to an MBBR sewage treatment system and a treatment process. Background technique [0002] As the country raises the discharge standards of sewage treatment plants, it is imminent to upgrade and transform the existing sewage treatment plants. However, the common problem encountered in the upgrading and transformation is that the total nitrogen reaches the standard. At the same time, when the total nitrogen reaches the standard, How to achieve other indicators to meet the standards simultaneously in the most economical way. The conventional nitrogen and phosphorus removal process in sewage treatment plants has been difficult to meet the current water quality requirements, and the traditional secondary treatment process in sewage treatment plants has low volume load and occupies a large area. [0003] Using the MBBR (Moving Bed Biofilm Reactor, moving bed biofilm reactor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F2203/006C02F2209/22C02F2209/14C02F2209/16C02F2209/08C02F2301/046C02F2303/14C02F1/5281C02F1/52C02F3/34C02F3/305C02F3/308C02F1/001Y02W10/10
Inventor 郑志佳孙庆花张晶晶吴迪
Owner QINGDAO SPRING WATER TREATMENT
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