MBBR (Moving Bed Biofilm Reactor) 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 good results, reduce wear and tear, and improve resources

Pending 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

[0010] 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) sewage treatment system and treatment process

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Embodiment 1

[0066] The effluent of the primary sedimentation tank of a city sewage treatment plant is used as the system inlet water, with a water volume of 8.3m 3 / h, pH average 6.90, influent COD concentration 120-300mg / L, BOD concentration 60-125mg / L, TN concentration 32-45mg / L, ammonia nitrogen concentration 25-40mg / L, TP concentration 2-6mg / L, SS The concentration is 120-200mg / 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 effluent area adopts submerged ultrafiltration membrane modules and negative pressure suction filtration.

[0067] During operation, the reflux ratio of the nitrifying liquid from the biofilm zone to the anoxic zone 1 is 240%, the reflux ratio from ...

Embodiment 2

[0071] The effluent from the regulating tank of a township sewage treatment station is used as the system inflow, with a water volume of 4.2m 3 / h, pH average 6.90, influent COD concentration 100-400mg / L, BOD concentration 50-225mg / L, TN concentration 25-45mg / 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 50%; the submerged membrane module is set in the water outlet area, and the negative pressure suction filter is used.

[0072] 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%, ...

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Abstract

The invention discloses an MBBR (Moving Bed Biofilm Reactor) sewage treatment system and a treatment process and belongs to the technical field of sewage treatment. The problems in the prior art thata treatment process of the traditional sewage treatment plant is long in procedure, low in integration level, low in load, high in carbon source requirement and common in effect 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, 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 membrane flux of a membrane assembly in the effluent zone and aeration density 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 of being high in integration level, capable of synchronously removing nitrogen and phosphorus and saving the carbon source, low in concentration of the nitrogen, phosphorus and SS in theeffluent, high in load and long in equipment service life.

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] In order to strengthen the protection of the water environment, the country has put forward higher requirements for the effluent water quality of sewage treatment plants. The traditional secondary treatment process of sewage treatment plants has a general effect on the removal of nitrogen and phosphorus, and the volume load is low. Large; the SS of the gravity-type sludge-water separation is relatively high, which cannot meet the increasingly high SS requirements of the effluent. These two points are where the technology lags behind the traditional secondary treatment process. [0003] Using the MBBR (Moving Bed Biofilm Reactor, moving bed biofilm reactor) process, a certain amount of suspension carrier is added to the reactor as a carrier for microbial attachment and growth, bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F3/34C02F3/308C02F1/444C02F1/5281C02F1/52C02F2301/046C02F2303/14C02F2203/006C02F2209/10C02F2209/22C02F2209/16C02F2209/14
Inventor 郑志佳孙庆花李闯修吴迪
Owner QINGDAO SPRING WATER TREATMENT
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