CN201746430U - Sequencing suspended carriers biomembrane sewage treatment device - Google Patents

Abstract

The utility model relates to a sequence batch type suspended filler biofilm sewage treatment device. The device includes a water tank, which is connected to the reactor through a pipeline, a water pump, and a water distribution head; the reactor is equipped with a spiral agitator, an aeration head connected to the aerator, and a water distribution head connected to the water pump; the water pump, aeration The machine, the screw agitator and the valve are connected with the time controller, and the characteristic is that the above-mentioned reactor is also equipped with a suspended filler, which is a plastic multi-faceted hollow ball or a polyurethane mesh sponge block; and the water distribution head is also connected with the valve. It also plays a drainage role. The device of the utility model adopts the improved sequence batch operation method, which has the advantages of the biofilm method and the activated sludge method at the same time, and can automatically control the water inlet time, aeration time, sedimentation time, drainage and stirring time, and ensure COD, ammonia nitrogen And the removal effect of total nitrogen, it is a kind of sequential batch type suspended packing sewage treatment device suitable for various sewage/waste water and river water.

Description

Sequencing batch suspended packing biofilm sewage treatment device

technical field

The utility model belongs to the field of water treatment equipment, in particular to a sequential batch type suspended filler biofilm sewage treatment device.

Background technique

Biofilm sewage treatment is a technology that makes microorganisms such as nitrifying bacteria and denitrifying bacteria fix on the surface of the filler and grow in the form of a film to achieve sewage treatment. Generally, it can be divided into biological filter, biological turntable, biological contact oxidation method, etc. Although their structures are very different, their basic principles are the same, that is, through the contact between wastewater and biofilm, the mass transfer of solid-liquid two-phase is carried out. Biofilm biodegrades organic matter, enabling wastewater to be purified. The biofilm method has a high treatment efficiency and has obvious effects on water bodies slightly polluted by organic matter and ammonia nitrogen. However, there are still many unresolved problems in the microbial film-hanging technology of the biofilm method.

Nowadays, sewage biological treatment technology is constantly improving, but judging from the current application situation at home and abroad, the existing sewage biological treatment process still has a relatively complicated process, which requires a large area and high infrastructure investment, and the operation and maintenance and management difficulties. The composite process using activated sludge and biofilm has its unique characteristics and advantages when solving the problems existing in traditional processes. The activated sludge method has the advantages of large processing capacity, high processing efficiency and good effluent quality. Its various deformation processes have good nitrogen and phosphorus removal performance, and have been widely used in urban sewage treatment; its disadvantage is that it is not enough Stable, easy to produce sludge bulking and large sludge output, poor treatment effect on low-concentration sewage. The biofilm method has the advantages of stable operation, less residual sludge, simple management, strong ability to remove ammonia nitrogen and refractory pollutants, and can adapt to a wide range of water quality changes; the disadvantages of the fixed-fill biofilm sewage treatment device are: packing and Its supporting structure requires a high initial investment, and the fine particles produced by the shedding of the dust film are not easy to settle, resulting in high turbidity of the effluent, easy plugging of the filler, and weak removal capacity of total nitrogen and total phosphorus.

At present, there are related patent reports on the biofilm method. The Chinese patent application with the application number 200910069639.4 is based on the continuous aeration-intermittent aeration process. Activated sludge is added to the reactor, and the floating aeration chain is used as the aeration device. But the biofilm on the filler suspended on the floating chain only played an auxiliary role. The patent "Film Hanging Method of Filler in Biological Contact Oxidation Pool" (Patent No. ZL200710061583.9) cannot fully satisfy the growth of nitrifying bacteria and denitrifying bacteria on the biofilm and achieve the purpose of removing total nitrogen. The patent "Sewage Aerobic Biofilm Treatment Device" (Patent No. ZL 02157780.3) adopts fixed packing to attach biofilm, but the falling biofilm is easy to block the packing, which obviously affects the sewage treatment effect.

Contents of the invention

The purpose of the present invention is to provide a sequence batch type suspension filler biofilm sewage treatment device, which combines the advantages of the activated sludge method and the biofilm method device to provide a device that can adapt to low-concentration sewage/waste water and river water, and can effectively remove COD , ammonia nitrogen and total nitrogen, so that the effluent COD, ammonia nitrogen and total nitrogen can all meet the first-level discharge standard of urban sewage treatment, so as to make up for the shortcomings of the existing technology.

The device of the utility model includes a water tank, which is connected to the reactor through pipelines, water pumps and water distribution heads; the reactor is equipped with a spiral agitator, an aeration head connected with the aerator and a water distribution head connected with the water pump; the water pump , an aerator, a spiral agitator and a valve are connected to a time controller, and it is characterized in that the above-mentioned reactor is also equipped with suspended packing, and the water distribution head is also connected with the valve and plays a role in drainage.

The creation principle of the utility model improved sequencing batch suspended packing biofilm sewage treatment reactor is based on the combination of activated sludge method and biofilm method, which not only has the advantages of biofilm method and activated sludge method, but also has the advantages of sequence batch The benefits brought by the traditional SBR operation mode. By adding suspended filler as filler for microbial attachment and growth, increasing the sludge concentration in the reactor, increasing the amount of fixation of nitrifying bacteria and denitrifying bacteria, enhancing the ability to resist changes in the external environment and the ability to resist impact loads, thereby also strengthening the The system's ability to remove COD, ammonia nitrogen and total nitrogen. Especially when the treatment effect of activated sludge method and biofilm method reaches the limit, the sequencing batch suspended packed bed sewage treatment process will show its unique advantages.

Compared with the prior art, the utility model has the advantages of:

1. The filler used in this utility model is a suspension filler. Using this type of filler makes the reactor have the advantages of both the activated sludge method and the biofilm method, and the hydraulic retention time is short and the effluent water quality is good;

2. The utility model has a spiral agitator in the reactor to ensure that the filler and the matrix are fully contacted to obtain sufficient nutrition, play the role of all suspended filler biofilms, and improve the efficiency of sewage treatment;

3. The utility model adopts the sequence batch operation mode, which can automatically control the water intake time, aeration time, sedimentation time, drainage time and stirring time, so as to ensure the removal effect of COD, ammonia nitrogen and total nitrogen.

The utility model has the advantages of simple equipment, convenient operation, easy control, small investment and low energy consumption. Moreover, the amount of sludge generated is small and the sewage treatment effect is good. It is a sequential batch type suspended filler sewage treatment device suitable for various sewage/waste water and river water.

Description of drawings

Figure 1: Schematic diagram of the device structure of the present utility model.

Among them: 1 water tank, 2 water pump, 3 time controller, 4 valve, 5 aerator, 6 distribution head, 7 aeration head, 8 suspension packing, 9 reactor, 10 spiral agitator, 11 pipeline.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the device of the present utility model includes a water tank 1, which is connected to the reactor 9 via a pipeline 11, a water pump 2, and a water distribution head 6; The aeration head 7 connected with 5 and the water distribution head 6 connected with the water pump 2; The filler 8 is suspended, and the water distribution head 6 is also connected with the valve 9 and plays the role of drainage.

The suspension filler 8 is a plastic multifaceted hollow sphere or a polyurethane mesh sponge block; the above plastic multifaceted hollow sphere is a sphere with a radius of 20 mm and a density of 0.13 g/cm ³ .

The device of the present invention adopts the improved sequence batch method to operate, including the following steps: in the water intake stage: open the water pump 2, and simultaneously close the valve 4, aerator 5 and screw agitator 10; in the aerobic aeration stage: close the water pump 2 and valve 4, open aerator 5 and screw agitator 10; anoxic reaction stage: close water pump 2, valve 4 and aerator 5, open screw agitator 10; precipitation stage: close water pump 2, valve 4, aerator Aerator 5 and spiral agitator 10; Drainage stage: close water pump 2, aerator 5 and spiral agitator 10, and open valve 4. During the operation of the reactor, the helical agitator 10 is turned on during the aerobic aeration stage and the anoxic reaction stage to ensure sufficient contact between the wastewater and the suspended filler 8, and improve the efficiency of sewage/wastewater and river water treatment.

Example 1

The volume of the above-mentioned reactor 9 is 10L, and the suspended filler 8 is a plastic polyhedral hollow sphere filler (radius 20mm, density 0.13g/cm ³ ). _Cr 120~140mg/L, NH ₄ ⁺ -N 25~30mg/L, TN 30~35mg/L, pH 7~7.2. The operating conditions adopted are: instantaneous water inflow, anoxic stirring reaction for 2 hours, aerobic aeration reaction for 6 hours, anoxic stirring reaction for 3 hours, precipitation for 1 hour, and instantaneous drainage. Treatment effect: The removal rate of COD is 85.6%, the removal rate of ammonia nitrogen is 100%, and the removal rate of total nitrogen is 67.3%. The effluent quality meets the first-class discharge standard of urban sewage.

Example 2

The volume of the above-mentioned reactor 9 is 10L, and the suspending filler 8 added inside is a polyurethane mesh sponge block. After the film formation is successfully started, water starts to enter, and the water quality of the influent sewage is: COD _Cr 120-140mg/L, NH ₄ ⁺ -N 25~30mg/L, TN 30~35mg/L, pH 7~7.2. The operating conditions adopted are: instantaneous water inflow, anoxic stirring reaction for 2 hours, aerobic aeration reaction for 6 hours, anoxic stirring reaction for 3 hours, precipitation for 1 hour, and instantaneous drainage. The COD removal rate of the utility model is 81.2%, the NH ₄ ⁺ removal rate is 100%, and the total nitrogen removal rate is 62.8%.

Claims (2)

1. A sequence batch type suspended packing biofilm sewage treatment device, comprising a water tank (1), the water tank (1) passes through a water pump (2), a water distribution head (6) and a reactor (9) via a pipeline (11) connected; the reactor (9) is equipped with a spiral agitator (10), an aeration head (7) connected to the aerator (5) and a water distribution head (6) connected to the water pump (2); the water pump (2), The aerator (5), the screw agitator (10) and the valve (4) are connected to the time controller (3), and it is characterized in that a suspended filler (8) is also housed in the above-mentioned reactor (9), and the water distribution head ( 6) It is also connected with the valve (4) and plays the role of drainage. 2. A kind of sequence batch type suspended packing biofilm sewage treatment device as claimed in claim 1, it is characterized in that above-mentioned suspended packing (8) is that radius is 20mm, the plastic multifaceted hollow sphere of density 0.13g/ ^cm or polyurethane mesh Sponge block.

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