Horizontal type three-phase biological fluidized bed and sewage treatment method thereof

A biological fluidized bed, horizontal technology, applied in the field of sewage treatment process, can solve the problems of no more than 10,000 tons, shape and structure restrictions, easy blockage and hardening of biological fluidized bed, etc., to achieve the effect of increasing impact resistance

Active Publication Date: 2014-09-10
WUHAN HUIZHONG DACHUAN AUTOMATIC CONTROL EQUIP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Although the existing biological fluidized bed has the above advantages, there are also the following problems: (1) the existing biological fluidized bed is easy to block and harden, and the cost of cleaning after blocking and hardening is huge; (2) the existing fluidized bed treatment The scale is limited. According to Section 6.1.4 of "Technical Specifications for Internal Circulating Aerobic Fluidized Bed Sewage Treatment Engineering (HJ2021-2012)" of the Ministry of Environmental Protection, "The maxi

Method used

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  • Horizontal type three-phase biological fluidized bed and sewage treatment method thereof
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  • Horizontal type three-phase biological fluidized bed and sewage treatment method thereof

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Effect test

Embodiment 1

[0052] Example 1: Catering and accommodation sewage is discharged into the regulating tank of the sewage treatment station, the influent water volume is 100 tons / day, and the water quality is as follows: water temperature 8.5 ° C, pH 7.8, suspended solids, 59 mg / l; chemical oxygen demand 159 mg / l ; Biochemical oxygen demand 50mg / l; ammonia nitrogen 14.4mg / l; total phosphorus 0.81mg / l; hydraulic retention time 6 hours. The water in the regulating tank of the sewage treatment station is lifted to the horizontal three-phase fluidized bed described in the present invention by a lifting pump for purification treatment. The biological filler selected in the treatment process is produced by Dalian Shengyuan Water Treatment Equipment Development Co., Ltd. The biological filler of model BM-5 has a diameter of 25mm, a height of 8mm, and a specific gravity of 0.95g / cm 3 Above, specific surface area ≥ 500m 2 / m 3 , porosity ≥ 95%, the specific process is as follows:

[0053] (1) After ...

Embodiment 2

[0058] Embodiment 2: The catering and domestic sewage of middle school students in the student education base is discharged into the regulating pool of the sewage treatment station. The influent water volume is 300 tons / day, and the water quality is as follows: suspended solids, 242mg / l; chemical oxygen demand 286mg / l; biochemical oxygen demand Amount of 47.7mg / l; ammonia nitrogen 18.1mg / l; total phosphorus 1.58mg / l; hydraulic retention time 9 hours. After adopting the horizontal three-phase biological fluidized bed of the present invention to carry out sewage treatment, the effluent water quality is as follows: suspended solids, 37mg / l; chemical oxygen demand 47mg / l; biochemical oxygen demand 5.8mg / l; ammonia nitrogen 2.03mg / l; total phosphorus is 0.41mg / l, and the effluent reaches the first-class A standard value in Table 1 of the National GB18919-2002 "Pollutant Discharge Standards for Urban Sewage Treatment Plants".

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Abstract

The invention provides a horizontal type three-phase biological fluidized bed and a sewage treatment method thereof. According to the horizontal type three-phase biological fluidized bed, a water inlet and water distribution anaerobic zone, a high-load facultative biological treatment zone, a baffling zone, a low-load aerobic biological treatment zone and a settling pond are horizontally arranged from a water inlet end to a water outlet end, and moreover suspended biological stuffing layers are arranged inside other zones except the baffling zone. Sewage is fed into the water inlet and water distribution anaerobic zone, in an anaerobic environment, BOD organic maters in the wastewater are converted into a fermentation product by facultative fermentation bacteria, polymerized phosphate stored in the cells is decomposed by phosphorus-accumulating bacteria, and then the sewage is fed into the high-load facultative biological treatment zone to remove COD and nitrogen, is further fed into the low-load aerobic biological treatment zone to reduce phosphorus in the effluent, and is finally settled, clarified and filtered by the settling pond so as to obtain clean water. As all process steps are accomplished in one same horizontal pond, the land is saved, the phenomenon that equipment such as a pump and a valve is blocked when dispersed type stuffing is adopted to treat sewage is avoided, and a carrier is prevented from loss, piling or hardening.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a sewage treatment method combined with an activated sludge method and a biofilm method and a horizontal three-phase biological fluidized bed for sewage treatment. Background technique [0002] The process of using microorganisms for sewage treatment is traditionally divided into two categories: activated sludge process and biofilm process. In the 1970s, aerobic biological fluidized bed sewage treatment technology was developed. The basic feature of this kind of sewage treatment is "using granular materials such as sand, ceramsite, activated carbon and synthetic materials as carriers to provide a good environment for the growth of microorganisms." Huge surface area. The mixed fluid of sewage and air passes through the bed at a certain speed from bottom to top to fluidize the carrier” [1] , this method combines the advantages of biofilm and activated sludge, some people also call thi...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 刘川刘晓川
Owner WUHAN HUIZHONG DACHUAN AUTOMATIC CONTROL EQUIP CO LTD
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