An anaerobic ammonia oxidation biological nitrogen removal treatment system
The anaerobic ammonia oxidation biological nitrogen removal system, which integrates aeration, packing, and monitoring systems, solves the problems of high cost and high sludge production in traditional nitrogen removal processes, achieving efficient and stable nitrogen removal and cost savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG LONGRUN ENVIRONMENTAL GROUP CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional denitrification processes have high operating costs, produce large amounts of sludge, and operate at low loads. They also require the addition of additional carbon sources to improve the treatment efficiency of wastewater with low carbon-to-nitrogen ratios.
An anaerobic ammonia oxidation biological nitrogen removal system is adopted, which integrates an aeration system, a packing system, a monitoring system, and a reflux system. Through simultaneous short-cut nitrification and anaerobic ammonia oxidation reactions, it achieves efficient nitrogen removal and reduces dependence on carbon sources.
It improves wastewater treatment efficiency and stability, reduces operating costs, reduces sludge production, achieves efficient nitrogen removal, and requires no additional carbon source.
Smart Images
Figure CN224530739U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment technology, specifically an anaerobic ammonia oxidation biological denitrification treatment system. Background Technology
[0002] Traditional nitrogen removal processes must involve both nitrification and denitrification. Because nitrifying and denitrifying bacteria have different environmental requirements, these two processes cannot occur simultaneously. Traditional biological nitrogen removal processes separate anoxic and aerobic zones, operating them in different reaction tanks, employing nitrification and denitrification tank processes, or alternating aerobic and anoxic operation within the same tank.
[0003] Traditional nitrogen removal processes currently on the market have the following problems: 1. High operating costs. Traditional heterotrophic denitrification requires the consumption of carbon sources during the reaction process. The additional carbon source added for wastewater with low carbon and nitrogen ratios increases operating costs; 2. Large sludge production. The addition of carbon sources increases sludge production, increasing the burden on the wastewater treatment sludge removal system; 3. Low operating load. Heterotrophic denitrification has a low operating load, with a removal efficiency of less than 80%. Utility Model Content
[0004] This invention provides an anaerobic ammonia oxidation biological denitrification system to overcome the shortcomings of existing technologies.
[0005] To achieve the above objectives, this utility model provides the following technical solution: An anaerobic ammonia oxidation biological denitrification treatment system includes a reaction tank with an inlet system at the bottom of one end and an outlet system at the top of the other end. The treatment system also includes an aeration system, a packing system, and a monitoring system. During operation, parameters are adjusted to achieve simultaneous short-cut nitrification and anaerobic ammonia oxidation denitrification.
[0006] Furthermore, the aeration system includes a blower and an aeration pipe, the aeration pipe being a stainless steel perforated pipe located at the bottom of the reaction tank.
[0007] Furthermore, the packing system includes a packing support and packing material. The packing support is made of stainless steel, and the packing material is made of aldehyde fiber and polyester filament. The height of the packing material is not less than 70% of the height of the reaction tank.
[0008] Furthermore, the monitoring system includes a pH meter, a DO meter, an ORP meter, a thermometer, and an electromagnetic flow meter. The pH meter monitors the pH value, the DO meter monitors the dissolved oxygen in the tank, the ORP meter measures the oxidation-reduction potential in the reaction tank, the thermometer monitors the water temperature in the tank, and the electromagnetic flow meter monitors the influent and reflux flow rates of the reaction tank.
[0009] Furthermore, the pipes of the water inlet system and the water outlet system are connected through a reflux system; the reflux system includes a reflux pump and reflux pipes.
[0010] Furthermore, it also includes a PLC controller, which is electrically connected to the aeration system and the monitoring system, and is used to adjust the operating parameters according to the real-time data of the monitoring system.
[0011] Furthermore, the operating parameters of this treatment system are: pH 7.5-8.5; DO < 0.5 mg / L; temperature 30-35℃. The beneficial effects of this utility model are as follows: The anaerobic ammonia oxidation biological denitrification system provided by this utility model integrates an aeration system, a packing system, a monitoring system, an influent system, and a return system. Through the monitoring system, it achieves efficient treatment and real-time monitoring, improves the efficiency and stability of wastewater treatment, and saves operating costs by eliminating the need for additional carbon source addition during operation. Short-cut nitrification and anaerobic ammonia oxidation are carried out simultaneously, greatly reducing the tank volume. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the processing system of this utility model; In the diagram: 01, reaction tank; 02, packing system; 03, inlet system; 04, reflux system; 05, outlet system; 06, aeration system; 07, monitoring system; 08, electromagnetic flowmeter; 09, reflux pump. Detailed Implementation
[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described in detail here, but the embodiments of the present invention are not limited to the following embodiments.
[0015] Example 1: An anaerobic ammonia oxidation biological denitrification treatment system includes a reaction tank 01, with an inlet system 03 at the bottom of one end and an outlet system 05 at the top of the other end; in this example, the reaction tank 01 has a volume of 500 cubic meters and a height of 5 meters.
[0016] The treatment system also includes an aeration system 06; the aeration system 06 includes a blower and an aeration pipe; in this embodiment, the aeration pipe is a stainless steel perforated pipe, located at the bottom of the reaction tank 01, and the blower has an air volume of 0.86 m³ / s. 3 / min.
[0017] The processing system also includes a packing system 02; the packing system 02 includes a packing support and packing, the packing support is made of stainless steel, and the packing is made of aldehyde fiber and polyester filament. In this embodiment, the packing height is 3.5 meters.
[0018] In this embodiment, the pipes of the water inlet system 03 and the water outlet system 05 are connected through the return system 04; the return system 04 includes a return pump 09 and a return pipe.
[0019] The treatment system also includes a monitoring system 07; the monitoring system 07 includes a pH meter, a DO meter, an ORP meter, a thermometer, and an electromagnetic flow meter 08. The pH meter monitors the pH value, the DO meter monitors the dissolved oxygen in the tank, the ORP meter measures the oxidation-reduction potential in the reaction tank, the thermometer monitors the water temperature in the tank, and the electromagnetic flow meter 08 is installed on the inlet pipe and the return pipe to monitor the inflow and return flow of the reaction tank.
[0020] It also includes a PLC controller, which is electrically connected to the aeration system 06 and the monitoring system 07, and is used to adjust the operating parameters according to the real-time data of the monitoring system 07.
[0021] The wastewater treatment system of this invention is used to treat wastewater with the following operating parameters: pH controlled at around 8.2; DO less than 0.3 mg / L; and temperature 33℃. The specific process is as follows: Wastewater containing 600 mg / L ammonia nitrogen, 700 mg / L total nitrogen, and 1000 mg / L COD enters the bottom of reaction tank 01 via inlet system 03 through a pipeline, and the inlet flow rate is controlled at 10 m³ / L by a PLC controller. 3 / h, the electromagnetic flowmeter 08 on the inlet pipe monitors the inlet water flow in real time to ensure that the inlet water flow rate is stable within the above range; part of the mixed liquid in the reaction tank 01 is returned from the outlet to the inlet through the reflux system 04, with a reflux flow rate of 10m³ / h. 3 / h, to maintain the microbial concentration and substrate balance in the reaction tank; A blower (three-lobe Roots blower) supplies air to the stainless steel perforated aeration pipe at the bottom of reactor 01. By controlling the aeration rate, the dissolved oxygen (DO) concentration in the reactor is maintained within the range of ≤0.3 mg / L, creating a micro-aerobic environment suitable for short-cut nitrification and anaerobic ammonia oxidation. Aldehyde-modified fiber and polyester filament packing materials suspended on the stainless steel packing support provide a carrier for the attachment and growth of anaerobic ammonia oxidizing bacteria and nitrite-oxidizing bacteria, forming a biofilm. The microbial community within the biofilm, through synergistic action, utilizes the NO2 produced by short-cut nitrification. ⁻ With NH4 in wastewater ⁺An anaerobic ammonia oxidation reaction occurs, converting both ammonia and nitrogen into nitrogen gas, thus achieving denitrification. During the reaction, the monitoring system 07 monitors the reaction conditions in real time and transmits the monitoring data to the PLC controller. The PLC controller automatically adjusts parameters such as aeration air volume and return flow rate according to preset thresholds to maintain optimal reaction conditions.
[0022] After 50 days of operation, the ammonia nitrogen and total nitrogen in the wastewater were significantly reduced, with effluent ammonia nitrogen at 30 mg / L, total nitrogen at 102 mg / L, and COD at 130 mg / L. The treated wastewater was discharged from reaction tank 01 through effluent system 05. Testing showed a total nitrogen removal rate of 85%, eliminating the need for an external carbon source.
[0023] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. An anaerobic ammonia oxidation biological nitrogen removal system, comprising a reaction tank (01), an inlet system (03) at the bottom of one end, and an outlet system (05) at the top of the other end; characterized in that, The treatment system also includes an aeration system (06), a packing system (02), and a monitoring system (07). During operation, parameters are adjusted to achieve simultaneous short-range nitrification and anaerobic ammonia oxidation denitrification. The aeration system (06) includes a blower and an aeration pipe, which is a stainless steel perforated pipe located at the bottom of the reaction tank (01). The packing system (02) includes a packing support and packing. The packing support is made of stainless steel, and the packing is made of aldehyde fiber and polyester filament. The height of the packing is not less than 70% of the height of the reaction tank.
2. The anaerobic ammonia oxidation biological nitrogen removal system as described in claim 1, characterized in that, The monitoring system (07) includes a pH meter, a DO meter, an ORP meter, a thermometer, and an electromagnetic flow meter. The pH meter monitors the pH value, the DO meter monitors the dissolved oxygen in the tank, the ORP meter measures the oxidation-reduction potential in the reaction tank, the thermometer monitors the water temperature in the tank, and the electromagnetic flow meter monitors the influent and reflux flow of the reaction tank.
3. The anaerobic ammonia oxidation biological nitrogen removal system as described in claim 1, characterized in that, The pipes of the water inlet system (03) and the water outlet system (05) are connected through the return system (04); the return system (04) includes a return pump (09) and a return pipe.
4. The anaerobic ammonia oxidation biological nitrogen removal system as described in claim 1, characterized in that, It also includes a PLC controller, which is electrically connected to the aeration system (06) and the monitoring system (07) and is used to adjust the operating parameters according to the real-time data of the monitoring system (07).
5. The anaerobic ammonia oxidation biological nitrogen removal system as described in claim 1, characterized in that, The operating parameters of the treatment system are: pH 7.5-8.5, DO less than 0.5 mg / L, and temperature 30-35℃.