Improved multi-point influent wastewater treatment device

Abstract

The utility model relates to a kind of improved multi-point water inlet sewage treatment device, it is related to sewage treatment technical field, and mainly including water inlet system, gas supply system, MABR-A1 pool, MABR-O pool, MABR-A2 pool, O pool, sedimentation tank and phosphorus removal pool, water inlet system includes first water inlet, second water inlet and third water inlet, first water inlet is set in MABR-A1 pool front end, second water inlet is set in MABR-O pool front end and third water inlet is set in MABR-A2 pool front end;MABR-A1 pool, MABR-O pool, MABR-A2 pool, O pool and sedimentation tank are sequentially connected;Sedimentation tank effluent enters phosphorus removal pool, and after further removal of phosphorus by phosphorus removal pool, discharge system outside. Using MABR process and conventional water treatment combined packing combination use, adopt three-point water inlet, make full use of carbon source, nitration liquid stage backflow, degrade water pollutant, realize water treatment efficient operation. The utility model has the advantages of no sludge backflow, good treatment effect, less or zero additional external carbon source, efficient denitrification, low operating cost.

Description

Technical Field

[0001] This utility model relates to an improved multi-point inlet sewage treatment device, and pertains to the field of sewage treatment technology. Background Technology

[0002] Urban wastewater treatment technology is becoming increasingly mature. With rapid economic development, the requirements for wastewater quality indicators are becoming more stringent, and many new technologies are emerging. Among them, MABR technology has been widely used in surface water treatment and the upgrading of urban wastewater treatment plants. However, it also needs to reduce costs and be combined with other processes. Currently, the C / N ratio in urban wastewater influent is not very high. While improving the effluent indicators, it is found that the carbon source required for the treatment process is seriously insufficient. To reduce or eliminate the addition of external carbon sources, it is necessary to divert the influent. Patent "CN 222861333 U" proposes a multi-point influent wastewater treatment device, which adopts a combination of pretreatment system, AAO process, and AO process. However, in order to better utilize the pollutant concentration in the raw water, reduce external carbon sources, and improve nitrogen removal, an improved multi-point influent wastewater treatment device is proposed based on patent "CN222861333 U" to achieve efficient treatment of urban wastewater and improve nitrogen removal rate. Utility Model Content

[0003] This utility model provides an improved multi-point influent wastewater treatment device, which adopts a process flow of influent → MABR process → AO process → sedimentation tank → phosphorus removal tank → effluent. It combines the MABR process with the traditional AO process, and sets up independent anoxic MABR process and MABR micro-aerobic process in the MABR process. The MABR micro-aerobic process is followed by the AO process, and the MABR process is further integrated into the A tank of the AO process to form a new combined process. The multi-point influent mode makes full use of carbon source, and adds two stages of nitrification liquid recirculation to remove sludge recirculation. The addition of a post-phosphorus removal tank improves the removal efficiency of wastewater treatment and achieves safe, reliable, low-cost and sustainable operation of wastewater treatment.

[0004] This utility model is achieved through the following technical solution: An improved multi-point inlet wastewater treatment device is characterized by comprising an inlet system, an air supply system, a MABR-A1 tank, a MABR-O tank, a MABR-A2 tank, an O tank, a sedimentation tank, and a phosphorus removal tank. The inlet system includes a first inlet, a second inlet, and a third inlet. The first inlet is located at the front end of the MABR-A1 tank, the second inlet is located at the front end of the MABR-O tank, and the third inlet is located at the front end of the MABR-A2 tank. The MABR-A1 tank, MABR-O tank, MABR-A2 tank, O tank, and sedimentation tank are connected sequentially. The effluent from the sedimentation tank enters the phosphorus removal tank, where phosphorus is further removed before being discharged from the system. The gas supply system is equipped with gas supply equipment, gas supply pipelines, and control valves to supply oxygen to the MABR-A1 tank, MABR-O tank, MABR-A2 tank, and O tank, respectively, and controls the dissolved oxygen content in each tank through valves. The MABR-A1 tank and the MABR-O tank are respectively equipped with MABR membrane treatment units, which are mainly composed of MABR membrane modules, membrane supports and gas supply pipes. The MABR-A2 tank is implanted with a MABR membrane packing treatment unit, which mainly consists of a MABR membrane module, water treatment combined packing, membrane support and gas supply branch pipe. The O-tank is implanted with a packing treatment unit, which mainly consists of water treatment combined packing, a packing frame, a bottom aeration pipe and a bottom aerator. The MABR-O tank is equipped with a first nitrification liquor reflux system, and the O tank is equipped with a second nitrification liquor reflux system; The phosphorus removal tank adopts a post-chemical phosphorus removal method. A stirring zone is set at the front end of the phosphorus removal tank, and a stirrer is installed in the stirring zone to add chemical phosphorus removal agent. Inclined tubes are installed in the sedimentation zone, and an effluent zone is set at the end. A sludge discharge system is set at the bottom.

[0005] Furthermore, the inlet flow rates of the first inlet, the second inlet, and the third inlet are Q1, Q2, and Q3, respectively, with Q1:Q2:Q3=2:2:1.

[0006] Furthermore, the dissolved oxygen content in the MABR-O tank is controlled at 0.5-1.5 mg / L.

[0007] Furthermore, a first nitrification liquor recirculation system is provided at the end of the MABR-O tank. The first nitrification liquor recirculation system consists of a first nitrification liquor recirculation pump and a first nitrification liquor recirculation pipe, and the first nitrification liquor recirculation ratio is controlled at 0-150%.

[0008] Furthermore, a second nitrification liquid reflux system is provided at the end of the O tank. The second nitrification liquid reflux system consists of a second nitrification liquid reflux pump and a second nitrification liquid reflux pipe. The second nitrification liquid reflux ratio is controlled between 0 and 100%.

[0009] Furthermore, the sedimentation tank is a radial flow sedimentation tank, with an inclined plate zone inside and a residual sludge discharge pipe at the bottom.

[0010] Furthermore, the MABR-A1 tank and the MABR-O tank are each equipped with two or more MABR membrane treatment units; the MABR-A2 tank is equipped with two or more MABR membrane packing treatment units.

[0011] Furthermore, the filling ratio of the packing water treatment unit in the O pool is less than or equal to 2 / 3.

[0012] This invention relates to an improved multi-point inlet wastewater treatment device that combines the MABR process with conventional water treatment composite packing. It employs a three-point inlet system, fully utilizes the carbon source, and allows for staged reflux of nitrified liquid to degrade pollutants in the water, achieving highly efficient water treatment operation. This invention offers advantages such as no sludge recirculation required, excellent treatment effect, minimal or zero external carbon source addition, high-efficiency denitrification, and low operating costs. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0014] Appendix Figure 2 This is a schematic diagram of the elevation flow structure of this utility model.

[0015] In the diagram: 1. Inlet system, 101. First inlet, 102. Second inlet, 103. Third inlet; 2. Air supply system, 201. Air supply pipeline, 202. Control valve; 3. MABR-A1 tank, 301. MABR membrane module; 4. MABR-O tank, 401. First nitrification liquor return pump, 402. First nitrification liquor return pipe; 5. MABR-A2 tank, 501. Water treatment combined packing material; 6. O tank, 601. Packing material treatment unit, 602. Second nitrification liquor return pump, 603. Bottom aeration pipe, 604. Bottom aerator, 605. Second nitrification liquor return pipe; 7. Sedimentation tank, 701. Inclined plate, 702. Excess sludge discharge pipe; 8. Phosphorus removal tank, 801. Agitator, 802. Inclined tube, 803. Effluent area, 804. Sludge discharge system. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, please refer to... Figures 1-2 The present invention will be further described below with reference to specific embodiments.

[0017] An improved multi-point inlet wastewater treatment device is characterized by comprising an inlet system 1, an air supply system 2, a MABR-A1 tank 3, a MABR-O tank 4, a MABR-A2 tank 5, an O tank 6, a sedimentation tank 7, and a phosphorus removal tank 8. The inlet system 1 includes a first inlet 101, a second inlet 102, and a third inlet 103. The first inlet 101 is located at the front end of the MABR-A1 tank 3, the second inlet 102 is located at the front end of the MABR-O tank 4, and the third inlet 103 is located at the front end of the MABR-A2 tank 5. The MABR-A1 tank 3, MABR-O tank 4, MABR-A2 tank 5, O tank 6, and sedimentation tank 7 are connected in sequence. The effluent from the sedimentation tank 7 enters the phosphorus removal tank 8, and after further phosphorus removal in the phosphorus removal tank 8, it is discharged from the system.

[0018] The gas supply system 2 is equipped with gas supply equipment, gas supply pipelines 201, and control valves 202, supplying oxygen to the MABR-A1 tank 3, MABR-O tank 4, MABR-A2 tank 5, and O tank 6 respectively, and controlling the dissolved oxygen content in each tank through valves. MABR-A1 tank 3 and MABR-O tank 4 are each equipped with a MABR membrane treatment unit, which mainly consists of a MABR membrane module 301, a membrane support, and gas supply branch pipes. MABR-A2 tank 5 is equipped with a MABR membrane packing treatment unit, which mainly consists of a MABR membrane module 301. The system consists of a water treatment combined packing material 501, a membrane support, and an air supply branch pipe; a packing treatment unit 601 is implanted in the O tank 6, which mainly consists of the water treatment combined packing material 501, a packing frame, a bottom aeration pipe 603, and a bottom aerator 604; the MABR-O tank 4 is equipped with a first nitrification liquid return system, and the O tank 6 is equipped with a second nitrification liquid return system; the phosphorus removal tank 8 adopts a post-chemical phosphorus removal method, with a stirring zone at the front end of the phosphorus removal tank 8, a stirrer 801 installed in the stirring zone, chemical phosphorus removal agent added, inclined tubes 802 installed in the sedimentation zone, an effluent zone 803 installed at the end, and a sludge discharge system 804 installed at the bottom.

[0019] In the above-mentioned device, the influent flow rates of the first inlet 101, the second inlet 102, and the third inlet 103 are Q1, Q2, and Q3, respectively, with Q1:Q2:Q3=2:2:1; the dissolved oxygen content in the MABR-O tank 4 is controlled at 0.5-1.5 mg / L; a first nitrification liquid return system is set at the end of the MABR-O tank 4, which consists of a first nitrification liquid return pump 401 and a first nitrification liquid return pipe 402, and the first nitrification liquid return ratio is controlled at 0-150%; a second nitrification liquid return system is set at the end of the O tank 6, which consists of a second nitrification liquid return pump 601 and a second nitrification liquid return pipe 602, and the second nitrification liquid return ratio is controlled at 0-100%; the sedimentation tank 7 is a radial flow sedimentation tank, with an inclined plate 701 installed inside and a residual sludge discharge pipe 702 installed at the bottom.

[0020] Example 1: A wastewater treatment project with a wastewater treatment capacity of 400m³ 3 / d, the SS in the influent pollutants is low, the influent flow rates of the first inlet 101, the second inlet 102 and the third inlet 103 of the influent system are Q1, Q2 and Q3 respectively, Q1:Q2:Q3=40%:40%:20%, Q1+Q2+Q3=100%.

[0021] The device is configured according to the above embodiments, wherein the MABR-A1 tank 3 has 4 sets of MABR membrane treatment units and the MABR-O tank 4 has 12 sets of MABR membrane treatment units; the MABR-A2 tank 5 has 6 sets of MABR membrane packing treatment units, and the ratio of MABR membrane modules to water treatment combined packing is 1:3; the filling ratio of the packing water treatment units in the O tank is 2 / 3. The gas supply system feeds into the MABR-A1 tank 3, MABR-O tank 4, MABR-A2 tank 5, and O tank 6 respectively, with the upper limit of dissolved oxygen concentration in each tank controlled at 0.5 mg / L, 1.5 mg / L, 0.5 mg / L, and 2 mg / L respectively; the hydraulic retention time of each tank in the MABR-A1 tank 3, MABR-O tank 4, MABR-A2 tank 5, and O tank 6 is controlled at 4h, 4~6h, 6h, and 6~8h respectively, and the total hydraulic retention time of the reaction zone is controlled within 22h. The MABR-O tank 4 is equipped with a first nitrification liquor recirculation system at its end, with the first nitrification liquor recirculation ratio controlled between 0-150%. The O tank 6 is equipped with a second nitrification liquor recirculation system at its end, with the second nitrification liquor recirculation ratio controlled between 0-100%. During operation, the nitrification liquor recirculation ratios of the two stages are gradually adjusted according to the effluent water quality indicators. In the optimal state, the recirculation ratios of both the first and second nitrification liquors can be controlled at 50%. The phosphorus removal tank 8 adopts a post-chemical phosphorus removal method. The chemical phosphorus removal agent is polyaluminum salt, which is added to the mixing zone in liquid form and stirred evenly by a stirrer. Inclined tubes 802 are installed in the sedimentation zone at an installation angle of 60º. An effluent zone 803 is set at the end, which adopts an overflow weir type. A clear water discharge pipe is set in the effluent zone, and the treated water is discharged from the clear water discharge pipe. Chemical sludge is discharged from the sludge discharge system 804 at the bottom.

[0022] When treating wastewater through the above steps, in the early stage of operation, the amount of external carbon source added is reduced by 15%-25% compared with the amount added for conventional denitrification. In the later stage of stable operation, no external carbon source is added at all, which can achieve efficient removal of nitrogen. The effluent quality of this utility model device can meet the requirements.

[0023] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope of this utility model, based on its technical solution and concept, should be included within the scope of protection of this utility model.

Claims

1. An improved multi-point inlet sewage treatment device, characterized in that: The system mainly includes an inlet water system, an air supply system, a MABR-A1 tank, a MABR-O tank, a MABR-A2 tank, an O tank, a sedimentation tank, and a phosphorus removal tank. The inlet water system includes a first inlet, a second inlet, and a third inlet. The first inlet is located at the front end of the MABR-A1 tank, the second inlet is located at the front end of the MABR-O tank, and the third inlet is located at the front end of the MABR-A2 tank. The MABR-A1 tank, MABR-O tank, MABR-A2 tank, O tank, and sedimentation tank are connected in sequence. The effluent from the sedimentation tank enters the phosphorus removal tank, where phosphorus is further removed before being discharged from the system. The gas supply system is equipped with gas supply equipment, gas supply pipelines, and control valves to supply oxygen to the MABR-A1 tank, MABR-O tank, MABR-A2 tank, and O tank, respectively, and controls the dissolved oxygen content in each tank through valves. The MABR-A1 tank and the MABR-O tank are respectively equipped with MABR membrane treatment units, which are mainly composed of MABR membrane modules, membrane supports and gas supply pipes. The MABR-A2 tank is implanted with a MABR membrane packing treatment unit, which mainly consists of a MABR membrane module, water treatment combined packing, membrane support and gas supply branch pipe. The O-tank is implanted with a packing treatment unit, which mainly consists of water treatment combined packing, a packing frame, a bottom aeration pipe and a bottom aerator. The MABR-O tank is equipped with a first nitrification liquor reflux system, and the O tank is equipped with a second nitrification liquor reflux system; The phosphorus removal tank adopts a post-chemical phosphorus removal method. A stirring zone is set at the front end of the phosphorus removal tank, and a stirrer is installed in the stirring zone to add chemical phosphorus removal agent. Inclined tubes are installed in the sedimentation zone, and an effluent zone is set at the end. A sludge discharge system is set at the bottom.

2. The improved multi-point inlet sewage treatment device according to claim 1, characterized in that: The inlet flow rates of the first inlet, the second inlet, and the third inlet are Q1, Q2, and Q3, respectively, with Q1:Q2:Q3 = 2:2:

1.

3. The improved multi-point inlet sewage treatment device according to claim 1, characterized in that: The MABR-O tank is equipped with a first nitrification liquor recirculation system at the end. The first nitrification liquor recirculation system consists of a first nitrification liquor recirculation pump and a first nitrification liquor recirculation pipe. The first nitrification liquor recirculation ratio is controlled between 0 and 150%.

4. The improved multi-point inlet sewage treatment device according to claim 1, characterized in that: A second nitrification liquid reflux system is installed at the end of the O tank. The second nitrification liquid reflux system consists of a second nitrification liquid reflux pump and a second nitrification liquid reflux pipe. The second nitrification liquid reflux ratio is controlled between 0 and 100%.

5. The improved multi-point inlet sewage treatment device according to claim 1, characterized in that: The sedimentation tank is a radial flow sedimentation tank, with an inclined plate zone inside and a residual sludge discharge pipe at the bottom.

6. The improved multi-point inlet sewage treatment device according to claim 1, characterized in that: The MABR-A1 tank and the MABR-O tank are each equipped with two or more MABR membrane treatment units; the MABR-A2 tank is equipped with two or more MABR membrane packing treatment units.

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