Filler system suitable for sewage treatment by SBBR (sequencing batch biofilm reactor) process

Abstract

The utility model provides a filler system suitable for treating sewage by an SBBR (sequencing batch biofilm reactor) process. The filler system comprises a hollow ball component and a fixed frame, the plurality of hollow ball assemblies are uniformly arranged on the fixing frame; the hollow ball assembly comprises hollow balls and connecting ropes, and the multiple hollow balls are arranged on the fixing frame through the connecting ropes. A sponge block is arranged in the hollow ball; and a plurality of uniformly distributed ball holes are formed in the hollow ball. The water treatment filler has the beneficial effects that the problems of fiber yarn dissipation, suspended hollow sphere accumulation and poor biofilm formation state of the traditional filler in the water treatment process can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of SBBR process treatment, and in particular relates to a filler system suitable for SBBR process sewage treatment. Background Art

[0002] The traditional fillers used in the SBBR process have many disadvantages during use. For example, the spiral fiber suspension filler (filling the porous suspended hollow sphere with spiral fiber filaments) has problems such as slow biofilm formation speed, low biofilm formation amount, and unstable effluent quality in actual application. The main problems of this suspension filler in field operation are:

[0003] (1) Fiber dispersion. The dispersed fibers cause the suspended balls to entangle with each other, and most of them gather at the aeration branch pipes, making it difficult to achieve the ideal state of rolling with aeration and fully contacting with the water body.

[0004] (2) Suspended ball filler accumulation. Due to the entanglement of the suspended ball filler and the large number of suspended balls, the flexibility of the suspended ball filler in the pool body is greatly affected. At the same time, under the power provided by aeration, the floating balls can easily move upward driven by bubbles, resulting in most of these suspended ball fillers being distributed on the surface of the water body.

[0005] (3) Poor biofilm formation. Due to the above-mentioned phenomenon of floating ball accumulation, the biofilm formation effect of the filler shows a certain differentiation phenomenon. The filler on the upper surface has poor biofilm formation effect because it cannot contact the liquid surface and has no nutrient supply. The filler in the center is in an anaerobic state even in an aerobic tank. Only the filler at the bottom has good contact with sewage and bubbles and has a better biofilm formation effect. Summary of the invention

[0006] In view of this, the present invention aims to provide a filler system suitable for treating wastewater using a SBBR process, so as to solve at least one problem in the background technology.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] A packing system suitable for treating sewage by SBBR process, comprising a hollow ball assembly and a fixing frame;

[0009] A plurality of hollow ball assemblies are evenly arranged on a fixing frame, and the fixing frame is installed in a sewage pool;

[0010] The hollow ball assembly includes a hollow ball and a connecting rope, and a plurality of hollow balls are arranged on a fixed frame through the connecting rope; a sponge block is arranged inside the hollow ball;

[0011] The hollow ball is provided with a plurality of evenly distributed ball holes.

[0012] Furthermore, the connecting rope is a PE connecting rope. The polyurethane black sponge is filled into the suspended hollow balls according to a certain proportion, the suspended hollow balls filled with the polyurethane black sponge are connected in series with the PE rope, and then fixed on a stainless steel fixing frame, and finally the entire filling system is placed in the sewage pool, so that the filling system achieves the best removal effect.

[0013] Furthermore, the sponge blocks are polyurethane black sponge blocks, and a plurality of sponge blocks are filled inside the hollow ball, and the volume of the sponge blocks is 30%-50% of the volume of the hollow ball. The filler of the biofilm is attached to the sponge blocks. The polyurethane black sponge does not need to be filled too full in the suspended hollow ball, and there should be gaps to provide sufficient space for the biofilm to attach to the filler.

[0014] Furthermore, the sponge block is a rectangular block, and the side length of the sponge block is 30mm-50mm.

[0015] Furthermore, the diameter of the hollow ball is 100 mm-150 mm.

[0016] Furthermore, the distance between the plurality of hollow ball assemblies is 150-200 mm.

[0017] Furthermore, the distance between the hollow balls of the hollow ball assembly is 150-200 mm.

[0018] Furthermore, the ball hole of the hollow ball is smaller than the size of the sponge block, which can prevent the sponge block from being moved out of the ball hole of the hollow ball.

[0019] Compared with the prior art, the filler system for treating sewage by SBBR process described in the present invention has the following advantages:

[0020] 1. In the case of a large aeration volume, in order to provide suitable hydraulic conditions for the activity of the filler in the suspended hollow balls, the ball holes of the suspended hollow balls should not be too small, and the spacing between the suspended hollow balls should not be too close. This will help the biofilm to hang evenly on the filler, and also weaken the impact and shear force received by the biofilm, and the number of biofilm shedding and renewal will also be reduced accordingly.

[0021] 2. This application uses a connecting rope to connect the suspended hollow balls with sponge blocks at a certain distance, and then fixes the suspended ball fillers on a stainless steel fixing frame at a certain distance. This solves the problems of fiber filaments escaping, suspended hollow ball accumulation, and poor film formation in the water treatment process of traditional fillers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of a sewage pool according to an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a hollow ball assembly according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a filler system suitable for treating sewage using an SBBR process according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Sponge block; 2. Hollow ball; 3. Fixed frame; 4. Connecting rope; 5. Sewage pool; 6. Overflow pipe; 7. Outlet pipe; 8. Gas flow meter; 9. Air pump; 10. Aeration plate; 11. Water inlet trough; 12. Water supply pump; 13. Water inlet; 14. Mud discharge valve. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] like Figure 1 As shown, a packing system suitable for treating sewage by SBBR process includes a hollow ball assembly and a fixing frame 3; a plurality of hollow ball assemblies are evenly and vertically arranged on the fixing frame 3, and the fixing frame 3 is installed in a sewage pool 5; the hollow ball assembly includes a hollow ball 2 and a connecting rope 4, and a plurality of hollow balls 2 are arranged on the fixing frame 3 through the connecting rope 4; a sponge block 1 is arranged in the hollow ball 2; and a plurality of evenly distributed ball holes are arranged on the hollow ball 2.

[0031] The connecting rope 4 is a PE connecting rope. The connecting rope 4 is set at the center of the hollow ball 2. The polyurethane black sponge 1 is filled into the suspended hollow ball 2 according to a certain proportion, and the suspended hollow ball 2 filled with the polyurethane black sponge 1 is connected in series with the PE connecting rope, and then fixed on the stainless steel fixing frame 3, and finally the whole filling system is placed in the sewage pool 5, so that the filling system can achieve the best removal effect.

[0032] In a specific implementation, the fixing frame 3 is a stainless steel frame.

[0033] The sponge block 1 is a polyurethane black sponge block, and a plurality of sponge blocks 1 are filled inside the hollow ball 2, and the volume of the sponge block 1 is 30%-50% of the volume of the hollow ball 2. The filler of the biofilm is attached to the sponge block 1. The polyurethane black sponge 1 does not need to be filled too full in the suspended hollow ball 2, and there must be a gap to provide enough space for the biofilm to attach to the filler.

[0034] The sponge block 1 is a rectangular block, and the side length of the sponge block 1 is 30mm-50mm.

[0035] The diameter of the hollow ball 2 is 100 mm-150 mm.

[0036] The distance between the several hollow ball assemblies is 150-200 mm.

[0037] The distance between the hollow balls 2 of the hollow ball assembly is 150-200 mm.

[0038] The ball hole of the hollow ball 2 is smaller than the size of the sponge block, which can prevent the sponge block from being transferred out of the ball hole of the hollow ball.

[0039] The water inlet tank 11 is connected to the sewage pool 5 through a water inlet pipe. A water inlet 13 is provided at the bottom of the sewage pool 5. The water inlet pipe is connected to the water inlet 13. A water supply pump 12 is provided on the water inlet pipe.

[0040] An aeration assembly is provided at the bottom of the sewage pool 5; the fixing frame 3 is installed in the sewage pool 5, an overflow pipe 6 is provided at the upper part of the sewage pool 5, an overflow valve is provided on the overflow pipe 6, a water outlet pipe is provided on one side of the sewage pool 5, a sewage pipe is provided at the bottom of the sewage pool 5, and a sewage valve is provided on the sewage pipe.

[0041] The aeration assembly includes an aeration plate 10, a gas flow meter 8, and an air pump 9;

[0042] The aeration plate 10 is arranged at the bottom of the sewage pool 5, the air pump 9 is connected to the aeration plate 10 through a connecting pipe, and the gas flow meter 8 is arranged on the connecting pipe.

[0043] Example 1

[0044] In this embodiment, artificially simulated domestic sewage is used, and the contents are prepared according to the conditions of COD≤400mg / L, ammonia nitrogen≤50mg / L, total phosphorus≤8mg / L, and total nitrogen≤60mg / L. 12 O6190.02mg / L, CH3COONa259.38mg / L, (C6H 10 O5)n 132.06mg / L, peptone 28mg / L, NH4Cl 153mg / L, K2HPO435.17mg / L, CaCl215mg / L, MgSO466mg / L, NaHCO3200mg / L; trace elements: FeSO40.3mg / L, CuSO40.1mg / L, MnSO40.3mg / L, ZnSO40.1mg / L, H3BO30.1mg / L.

[0045] The biofilm formation was started by inoculation method. The sludge was taken from a sewage treatment plant in Beichen District, Tianjin.-1 The concentration of 2.5 mmol / l was put into the reactor, and the reactor was operated at room temperature (20±5℃). The air pump supplied oxygen to the reactor at a gas supply rate of 2 L min -1 The DO concentration is maintained at 3-7 mg·L by a rotor flow meter. -1 .

[0046] Two cycles were run every day, each cycle included water intake (1h), aeration (10h), drainage and sedimentation (1h). During the biofilm period, in order to maintain the amount of inoculated sludge, the water exchange rate was 50% per cycle. When the COD and ammonia nitrogen removal rates of the reaction system tended to be stable, the reactor water exchange rate was adjusted to 100%.

[0047] After the acclimatization and cultivation, the water inlet was changed to a low carbon-nitrogen ratio, and the aeration volume was increased. The COD removal effect was relatively stable, with a removal rate of more than 85%, a total nitrogen removal rate stabilized at 50-56%, and ammonia nitrogen removal rate finally stabilized at about 50%. The stabilization of the drainage met the first-level discharge standard of rural domestic sewage in Tianjin (chemical oxygen demand ≤50mg / L; ammonia nitrogen ≤8mg / L; total nitrogen ≤20mg / L). Phosphorus removal mainly relies on the addition of polyaluminium chloride, and the stabilization of the drainage meets the second-level discharge standard of rural domestic sewage in Tianjin (total phosphorus ≤2mg / L).

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A packing system suitable for treating sewage by SBBR process, characterized by: It includes a hollow ball assembly and a fixing frame; A plurality of hollow ball assemblies are evenly arranged on a fixed frame; The hollow ball assembly includes a hollow ball and a connecting rope, and a plurality of hollow balls are arranged on a fixed frame through the connecting rope; a sponge block is arranged inside the hollow ball; The hollow ball is provided with a plurality of evenly distributed ball holes.

2. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The connecting rope is PE connecting rope.

3. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The sponge blocks are polyurethane black sponge blocks, and a plurality of sponge blocks are filled in the hollow ball, and the volume of the sponge blocks is 30%-50% of the volume of the hollow ball.

4. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The sponge block is a rectangular block, and the side length of the sponge block is 30mm-50mm.

5. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The diameter of the hollow ball is 100mm-150mm.

6. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The distance between the several hollow ball assemblies is 150-200 mm.

7. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The distance between the hollow balls of the hollow ball assembly is 150-200 mm.

8. A filler system suitable for treating sewage by SBBR process according to claim 1, characterized in that: The hole of the hollow ball is smaller than the size of the sponge block.

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