Kitchen waste water treatment system using anaerobic ammonia oxidation technology

Abstract

The utility model relates to a kind of kitchen wastewater treatment system using anaerobic ammonia oxidation technology, belong to sewage biological treatment technical field, it includes: water inlet pool, anaerobic reactor, first intermediate pool, baffling type bioreactor, second intermediate pool and anaerobic ammonia oxidation reactor connected in turn;First ammonia nitrogen on-line analyzer is equipped in water inlet pool, second ammonia nitrogen on-line analyzer is equipped in first intermediate pool, the water outlet of anaerobic reactor is connected with the circulating water inlet of anaerobic reactor and the water inlet of first intermediate pool respectively, nitrate nitrogen on-line analyzer is equipped at the water outlet of baffling type bioreactor, baffling type bioreactor is connected with fan system.This processing system is under the dual action of short-cut nitrification-anaerobic ammonia oxidation and short-cut denitrification-anaerobic ammonia oxidation, realize the deamination treatment of kitchen wastewater, without additional carbon source, aeration quantity is less, reduce operating cost, energy saving and cost reduction, and nitrogen removal efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of wastewater biological treatment technology, specifically to a kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology. Background Technology

[0002] After food waste undergoes separation, crushing, high-temperature cooking, oil extraction, and solid-liquid separation, it forms a slurry-like wastewater known as food wastewater. This wastewater is characterized by high oil, high salt, high nitrogen, high suspended solids, and high organic matter content. Improper treatment can pose a serious threat to the environment. Furthermore, as a typical high-ammonia-nitrogen wastewater, traditional denitrification processes for food wastewater are usually accompanied by high carbon source addition costs.

[0003] Therefore, it is necessary to design a kitchen wastewater treatment system that utilizes anaerobic ammonia oxidation technology to overcome the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a kitchen wastewater treatment system that utilizes anaerobic ammonia oxidation technology. Under the dual action of short-cut nitrification-anaerobic ammonia oxidation and short-cut denitrification-anaerobic ammonia oxidation, it achieves ammonia removal treatment of kitchen wastewater without the need for an external carbon source, requires less aeration, reduces operating costs, saves energy and reduces consumption, and has high nitrogen removal efficiency.

[0005] This utility model provides a kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology, comprising: an inlet tank, an anaerobic reactor, a first intermediate tank, a baffled bioreactor, a second intermediate tank, and an anaerobic ammonia oxidation reactor connected in sequence; the inlet tank is equipped with a first online ammonia nitrogen analyzer, the first intermediate tank is equipped with a second online ammonia nitrogen analyzer, the outlet of the anaerobic reactor is connected to the circulating inlet of the anaerobic reactor and the inlet of the first intermediate tank respectively, the outlet of the baffled bioreactor is equipped with a nitrate nitrogen online analyzer, the baffled bioreactor is connected to a blower system for introducing oxygen-containing gas into the baffled bioreactor, and the baffled bioreactor sequentially forms an anaerobic section, a micro-aeration section, and a fully aeration section from the inlet end to the outlet end.

[0006] Furthermore, the baffled bioreactor is equipped with partitions that divide it into interconnected anaerobic, micro-aeration, and fully aeration sections. The micro-aeration and fully aeration sections are equipped with aeration ends where the aeration volume can be controlled by a blower system.

[0007] Furthermore, the blower system is equipped with dedicated aeration pipes for micro-aeration section and full aeration section, and each aeration pipe is equipped with a control valve to control its flow rate.

[0008] Furthermore, the baffled bioreactor is equipped with a sludge hopper, and the sludge outlet of the sludge hopper is connected to the inlet of the baffled bioreactor via a sludge return pump.

[0009] Furthermore, the outlet of the anammox reactor is connected to the inlet of the anammox reactor via a second circulation pump.

[0010] Furthermore, the outlet of the inlet pool is connected to the inlet of the second intermediate pool via a metering pump, and the first intermediate pool is connected to the inlet of the second intermediate pool via a pipeline pump.

[0011] Furthermore, it also includes a dedicated control system, which is connected to the first online ammonia nitrogen analyzer, the second online ammonia nitrogen analyzer, and the online nitrate nitrogen analyzer. The dedicated control system controls and regulates the flow rate and flow distribution at the outlet of the inlet pool and the first intermediate pool.

[0012] Furthermore, the inlet pool is connected to the inlet of the anaerobic reactor via a first inlet pump; the first intermediate pool is connected to the inlet of the baffled bioreactor via a second inlet pump; and the second intermediate pool is connected to the inlet of the anaerobic ammonia oxidation reactor via a third inlet pump.

[0013] Furthermore, the outlet of the anaerobic reactor is connected to the inlet of the anaerobic reactor via a first circulation pump.

[0014] Furthermore, the baffled bioreactor is equipped with MBBR packing material.

[0015] This utility model has the following advantages and beneficial effects:

[0016] This treatment system combines short-cut nitrification-anaerobic ammonium oxidation to save aeration and carbon source dosage; it utilizes short-cut denitrification, which is easy to control and can stably achieve nitrite nitrogen production. The characteristic of nitrite accumulation overcomes the difficulty of short-cut nitrification in providing a stable supply of nitrite nitrogen for anaerobic ammonia oxidation. -N) substrate issues; simultaneously, under the dual action of short-cut nitrification-anammox and short-cut denitrification-anammox, even if the nitrogen removal efficiency of the short-cut nitrification-anammox effluent fluctuates, the subsequent short-cut denitrification-anammox effluent can achieve stable nitrogen removal through anammox reaction, avoiding excessively high nitrate nitrogen levels in the effluent; furthermore, by controlling the flow distribution of each influent pump through a dedicated control system, it has strong adaptability to water quality fluctuations, and can utilize kitchen wastewater as the carbon source for the short-cut denitrification reaction, while precisely controlling the ratio of nitrate nitrogen to ammonia nitrogen entering the anammox reactor to achieve the optimal nitrogen removal efficiency of the anammox reaction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology according to this utility model.

[0018] Explanation of icon numbers:

[0019] 1. Inlet tank; 11. First online ammonia nitrogen analyzer;

[0020] 2. Anaerobic reactor; 21. First influent pump; 22. First circulation pump;

[0021] 3. First intermediate water tank; 31. Second online ammonia nitrogen analyzer;

[0022] 4. Baffled bioreactor; 41. Second influent pump; 42. Blower system; 43. Sludge return pump; 44. Sludge hopper outlet; 45. Online nitrate nitrogen analyzer;

[0023] 5. Second intermediate water tank; 51. Metering pump; 52. Pipeline pump;

[0024] 6. Anaerobic ammonia oxidation reactor; 61. Third inlet pump; 62. Second circulation pump;

[0025] 7. Dedicated control system. Detailed Implementation

[0026] To better understand this utility model, the following embodiments are further illustrations of this utility model, but the content of this utility model is not limited to the following embodiments.

[0027] like Figure 1 As shown, a kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology includes: an inlet tank 1, an anaerobic reactor 2, a first intermediate tank 3, a baffled bioreactor 4, a second intermediate tank 5, and an anaerobic ammonia oxidation reactor 6, connected in sequence.

[0028] The system comprises the following components: Inlet tank 1 is connected to the inlet of anaerobic reactor 2 via a first inlet pump 21; the outlet of anaerobic reactor 2 is connected to the inlet of the first intermediate tank 3, and the outlet of anaerobic reactor 2 is connected to the circulating inlet of anaerobic reactor 2 via a first circulating pump 22; the first intermediate tank 3 is connected to the inlet of the baffled bioreactor 4 via a second inlet pump 41; the second intermediate tank 5 is connected to the inlet of the anaerobic ammonia oxidation reactor 6 via a third inlet pump 61. Simultaneously, the outlet of the anaerobic ammonia oxidation reactor 6 is connected to the circulating inlet of the anaerobic ammonia oxidation reactor 6 via a second circulating pump 62; the outlet of inlet tank 1 is connected to the inlet of the second intermediate tank 5 via a metering pump 51; and the first intermediate tank 3 is connected to the inlet of the second intermediate tank 5 via a pipeline pump 52.

[0029] Meanwhile, a first online ammonia nitrogen analyzer 11 is installed in the inlet pool 1, a second online ammonia nitrogen analyzer 31 is installed in the first intermediate pool 3, and a nitrate nitrogen online analyzer 45 is installed at the outlet of the baffled bioreactor 4.

[0030] The baffled bioreactor 4 is connected to a blower system 42 for introducing oxygen-containing gas into the baffled bioreactor 4. The baffled bioreactor 4 consists of a micro-aeration section and a fully aeration section from the inlet to the outlet, and is equipped with MBBR packing material. Specifically, the baffled bioreactor 4 is divided into interconnected anaerobic, micro-aeration, and fully aeration sections by partitions. Both the micro-aeration and fully aeration sections are equipped with aeration terminals controlled by the blower system 42 to regulate the aeration rate. The blower system 42 has dedicated aeration pipes for the micro-aeration and fully aeration sections, each equipped with a control valve to regulate its flow rate. Furthermore, the baffled bioreactor 4 is equipped with a sludge hopper, and the sludge outlet 44 of the sludge hopper is connected to the inlet of the baffled bioreactor 4 via a sludge return pump 43.

[0031] The processing system also includes a dedicated control system 7, which is connected to the first online ammonia nitrogen analyzer 11, the second online ammonia nitrogen analyzer 31, and the online nitrate nitrogen analyzer 45. The dedicated control system 7 controls the metering pump 51, the second inlet pump 41, and the pipeline pump 52 to regulate and control the flow rate and flow distribution at the outlets of the inlet pool 1 and the first intermediate pool 3.

[0032] In actual use, pretreated kitchen wastewater enters the inlet tank 1, and is then pumped into the anaerobic reactor 2 for further treatment. The effluent enters the first intermediate tank 3, and the first circulation pump 22 is activated to maintain a certain upward flow velocity within the anaerobic reactor 2. A portion of the wastewater in the first intermediate tank 3 enters the baffled bioreactor 4 via the second inlet pump 41. The front section of the baffled bioreactor 4 is an anaerobic environment, primarily for anaerobic phosphorus release. By adjusting the control valve of the aeration pipe in the blower system 42, the middle section of the baffled bioreactor 4 is kept in a state of micro-aeration, while MBBR packing is added to create an environment conducive to short-cut nitrification-anaerobic ammonium oxidation. The rear section of the baffled bioreactor 4 is in a state of complete aeration, ensuring that all residual nitrogen in the wastewater is converted into nitrate nitrogen, while aerobic phosphorus uptake also occurs. The sludge return pump 43 is activated to maintain a certain sludge concentration within the baffled bioreactor 4, and phosphorus removal from the wastewater is achieved by discharging phosphorus-rich residual sludge. The effluent from the baffled bioreactor 4 enters the second intermediate tank 5.

[0033] Under the regulation of the dedicated control system 7, a portion of the wastewater from the inlet tank 1 enters the second intermediate tank 5 through the metering pump 51 to provide a carbon source for subsequent short-cut denitrification; a portion of the wastewater from the first intermediate tank 3 enters the second intermediate tank 5 through the pipeline pump 52 to provide ammonia nitrogen substrate for subsequent anaerobic ammonia oxidation.

[0034] Wastewater in the second intermediate water tank 5 enters the anaerobic ammonia oxidation reactor 6 through the third inlet pump 61 for short-cut denitrification-anaerobic ammonia oxidation denitrification reaction, and the second circulation pump 62 is turned on to maintain a certain upward flow rate in the reactor.

[0035] This treatment system combines short-cut nitrification-anammox to save aeration and carbon source dosage. It leverages the ease of control and stable accumulation of nitrite nitrogen in short-cut denitrification, overcoming the difficulty of providing a stable nitrite nitrogen substrate for anammox. Simultaneously, under the dual action of short-cut nitrification-anammox and short-cut denitrification-anammox, even if the nitrogen removal efficiency of the short-cut nitrification-anammox effluent fluctuates, the subsequent short-cut denitrification-anammox effluent can achieve stable nitrogen removal through anammox, avoiding excessively high nitrate nitrogen levels in the effluent. Furthermore, a dedicated control system 7 controls the flow distribution of each influent pump, exhibiting strong adaptability to water quality fluctuations. It can utilize raw kitchen wastewater as a carbon source for the short-cut denitrification reaction while precisely controlling the nitrate nitrogen to ammonia nitrogen ratio entering the anammox reactor 6, achieving optimal nitrogen removal efficiency for the anammox reaction.

[0036] The above description is merely a preferred embodiment of the present utility model, and should not be construed as limiting the scope of the present utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the scope of protection of the present utility model.

Claims

1. A kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology, characterized in that, include: The system consists of an inlet tank, an anaerobic reactor, a first intermediate tank, a baffled bioreactor, a second intermediate tank, and an anaerobic ammonia oxidation reactor, connected in sequence. The inlet tank is equipped with a first online ammonia nitrogen analyzer, and the first intermediate tank is equipped with a second online ammonia nitrogen analyzer. The outlet of the anaerobic reactor is connected to both the circulating inlet of the anaerobic reactor and the inlet of the first intermediate tank. The outlet of the baffled bioreactor is equipped with an online nitrate nitrogen analyzer. The baffled bioreactor is connected to a blower system for introducing oxygen-containing gas into it. From the inlet to the outlet, the baffled bioreactor sequentially forms an anaerobic section, a micro-aeration section, and a fully aeration section.

2. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The baffled bioreactor is divided into interconnected anaerobic, micro-aeration, and fully aeration sections. The micro-aeration and fully aeration sections are equipped with aeration ends where the aeration volume can be controlled by a blower system.

3. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The blower system is divided into a micro-aeration section and a full aeration section with dedicated aeration pipes, and each aeration pipe is equipped with a control valve to control its flow rate.

4. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The baffled bioreactor is equipped with a sludge hopper, and the sludge outlet of the sludge hopper is connected to the inlet of the baffled bioreactor via a sludge return pump.

5. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The outlet of the anaerobic ammonia oxidation reactor is connected to the inlet of the anaerobic ammonia oxidation reactor via a second circulation pump.

6. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The outlet of the inlet pool is connected to the inlet of the second intermediate pool via a metering pump, and the inlet of the first intermediate pool is connected to the inlet of the second intermediate pool via a pipeline pump.

7. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: It also includes a dedicated control system, which is connected to the first online ammonia nitrogen analyzer, the second online ammonia nitrogen analyzer, and the online nitrate nitrogen analyzer. The dedicated control system controls and regulates the flow rate and flow distribution at the outlet of the inlet pool and the first intermediate pool.

8. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The inlet tank is connected to the inlet of the anaerobic reactor via a first inlet pump; the first intermediate tank is connected to the inlet of the baffled bioreactor via a second inlet pump; and the second intermediate tank is connected to the inlet of the anaerobic ammonia oxidation reactor via a third inlet pump.

9. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The outlet of the anaerobic reactor is connected to the inlet of the anaerobic reactor via a first circulation pump.

10. The kitchen wastewater treatment system utilizing anaerobic ammonia oxidation technology as described in claim 1, characterized in that: The baffled bioreactor is equipped with MBBR packing material.

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