Method for improving carbon source removal rate of anaerobic reactor

Abstract

The invention discloses a method for improving the carbon source removal rate of an anaerobic reactor, and the method comprises the following steps: arranging a reuse water tank which is located at the rear end of an aerobic system corresponding to the anaerobic reactor, and collecting wastewater treated by the aerobic system by the reuse water tank; wastewater is pumped into a backflow water inlet pipeline of the anaerobic reactor through a reuse water pump of a reuse water pool and serves as effluent backflow of the anaerobic reactor; and adjusting the flow of backflow inlet water of the anaerobic reactor so as to control the inlet water load of the anaerobic reactor. According to the invention, the carbon source removal rate of the high-concentration wastewater anaerobic reactor is improved.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a method for improving the carbon source removal rate of an anaerobic reactor. Background Art

[0002] With the acceleration of industrialization, the amount of wastewater discharge is increasing, especially high-concentration organic wastewater. If these wastewaters are not properly treated, they will not only cause serious pollution to the environment, but also affect the stability of the ecosystem. As an important equipment for wastewater treatment, anaerobic reactors are widely used to remove organic carbon sources from high-concentration wastewater. However, in traditional upflow anaerobic reactors, in order to meet the requirements of its upflow rate, a large amount of reactor effluent is usually required to be refluxed, but this method also brings technical difficulties that cannot be ignored.

[0003] The return wastewater of traditional upflow reactors generally has a high concentration of organic carbon sources. When the effluent quality of the reactor fluctuates or deteriorates, the organic carbon sources in the return water will enter the reactor again, such as Figure 1 As shown in Figure 1, the repeated entry of this organic load leads to the deterioration of the ecological environment inside the reactor, which greatly affects the regulation of sludge load. Through conventional operating methods, it is difficult to effectively maintain the ecological balance of the reactor, resulting in a vicious cycle and ultimately leading to a decline in wastewater treatment effect.

[0004] At present, many sewage treatment plants still use traditional upflow anaerobic reactors, especially when treating high-concentration wastewater. These reactors usually rely on a large amount of return water to maintain the normal operation of the reactor under the condition of meeting the upflow rate. However, the high concentration of organic carbon sources in the return wastewater will affect the stability of the anaerobic reactor, making it more difficult to adjust the load of the reactor, and ultimately making it impossible for the reactor to achieve the optimal organic load removal rate.

[0005] This problem is particularly prominent in some environmentally sensitive areas, because the removal effect of pollutants directly affects the water quality and the surrounding ecological environment. Therefore, seeking a technology that can accurately control the reactor influent load and improve the removal rate of organic carbon sources has become a technical problem that needs to be solved urgently in the current wastewater treatment field. Summary of the invention

[0006] The invention provides a method for improving the carbon source removal rate of an anaerobic reactor, so as to solve the problem that the carbon source removal rate of the anaerobic reactor in the related art is relatively low.

[0007] According to one aspect of the present invention, there is provided a method for improving the carbon source removal rate of an anaerobic reactor, comprising: setting a reuse water pool, the reuse water pool being located at the rear end of an aerobic system corresponding to the anaerobic reactor, the reuse water pool collecting wastewater treated by the aerobic system; pumping the wastewater into a return water inlet pipe of the anaerobic reactor through a reuse water pump of the reuse water pool as effluent return of the anaerobic reactor; and adjusting the flow rate of the return water inlet of the anaerobic reactor, thereby controlling the water inlet load of the anaerobic reactor.

[0008] Preferably, the capacity of the reuse water pool can meet the return water volume requirement of the anaerobic reactor.

[0009] Preferably, the organic carbon source content of the wastewater is less than or equal to 100 mg / L.

[0010] Preferably, the anaerobic reactor comprises: a UASB, IC or EG type reactor.

[0011] Preferably, the recycled water pump is a variable frequency pump.

[0012] Preferably, the return water inlet pipeline includes a filtering device for removing impurities in the water.

[0013] Preferably, a water quality monitoring device is provided in the reuse water pool for real-time monitoring of water quality.

[0014] Preferably, the reuse water pool is provided with an automatic cleaning device.

[0015] Preferably, the reuse water pump is provided with a regulating device for controlling the working flow rate of the reuse water pump, thereby regulating the reflux flow rate.

[0016] The method for improving the carbon source removal rate of an anaerobic reactor provided by the present invention is to set a reuse water pool that meets the anaerobic return water consumption at the rear end of the aerobic system, collect the wastewater that meets the national emission standards after being treated by the aerobic system (CASS system), and then use the reuse water pump of the reuse water pool to pump it into the return water inlet pipe of the anaerobic reactor through a pipeline to replace the original reactor effluent return. The problem in the related art that the negative impact of the organic carbon source on the anaerobic reactor in the traditional return method cannot be effectively avoided, thereby making the removal effect of the reactor unstable. By introducing the wastewater from the reuse water pool to replace the traditional return water, the interference of the organic carbon source in the return water on the ecological environment of the reactor is avoided, thereby improving the organic load removal rate of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. 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 drawings:

[0018] Figure 1 It is a schematic diagram of an anaerobic reactor treatment method according to the related art;

[0019] Figure 2 is a flow chart of a method for improving carbon source removal efficiency of an anaerobic reactor according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of an anaerobic reactor treatment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] This embodiment provides a method for improving the carbon source removal rate of an anaerobic reactor. Figure 2 is a flow chart of a method for improving the carbon source removal rate of an anaerobic reactor according to an embodiment of the present invention. Figure 2 As shown, the method includes the following steps S202 to S206.

[0023] Step S202, setting up a reuse water pool, which is located at the rear end of the aerobic system corresponding to the anaerobic reactor, and collects wastewater treated by the aerobic system.

[0024] Step S204, the wastewater is pumped into the return water inlet pipe of the anaerobic reactor through the reuse water pump of the reuse water tank, and is used as the effluent return of the anaerobic reactor.

[0025] Step S206, adjusting the flow rate of the return water of the anaerobic reactor, thereby controlling the water inlet load of the anaerobic reactor.

[0026] In the related art, many sewage treatment plants still use traditional anaerobic reactors, especially when treating high-concentration wastewater. These reactors usually rely on a large amount of return water to maintain the normal operation of the reactor under the condition of meeting the rising flow rate. However, the high concentration of organic carbon sources in the return wastewater will affect the stability of the anaerobic reactor, making it more difficult to adjust the load of the reactor, and ultimately making the carbon source removal rate of the anaerobic reactor relatively low. For example: In order to meet its own rising flow rate conditions, the traditional high-concentration wastewater upflow anaerobic reactor needs to use a large amount of effluent from the upflow anaerobic reactor as reflux. When the effluent indicators of the anaerobic reactor fluctuate or deteriorate, the effluent return will carry a large amount of organic carbon sources to enter the anaerobic reactor again, seriously affecting the regulation of the reactor inlet sludge load, further deteriorating the ecological environment of the anaerobic reactor, and causing a vicious circle.

[0027] This embodiment sets a reuse water pool that meets the anaerobic return water consumption at the rear end of the aerobic system, collects the wastewater that meets the national emission standards after being treated by the aerobic system (CASS system), and then pumps the wastewater into the return water inlet pipe of the anaerobic reactor through a pipe through the reuse water pump of the reuse water pool, replacing the original reactor effluent return. This solves the problem in the related art that the negative impact of the organic carbon source on the anaerobic reactor in the traditional return method cannot be effectively avoided, thereby making the removal effect of the reactor unstable. By introducing the wastewater from the reuse water pool to replace the traditional return water, the interference of the organic carbon source in the return water on the ecological environment of the reactor is avoided, thereby improving the organic load removal rate of the reactor.

[0028] Specifically, a recycling water pool that meets the anaerobic return water consumption collects the wastewater (organic carbon source is about 100 mg / L) that meets the national emission standards after being treated by the aerobic system (CASS system). Then, a recycling water pump is installed in the collection pool and pumped into the return water inlet pipe of the anaerobic reactor through a pipe (see Figure 3 ), replacing the original reactor effluent return, because the reused water load is low, the load of this part of the reused water can be regarded as 0. When adjusting the sludge load, the reactor load can be accurately controlled by only adjusting the water inlet of the reactor, which stabilizes the environment of the anaerobic bacteria, improves the activity of the anaerobic bacteria and the removal rate of the anaerobic reactor.

[0029] Preferably, the capacity of the reuse water pool can meet the requirements of the return water volume of the anaerobic reactor. This preferred embodiment can meet the requirements of the return water volume of the anaerobic reactor through the capacity of the reuse water pool, ensure the stability of the water supply during the operation of the anaerobic reactor, avoid the problem of unstable operation of the reactor caused by water source fluctuations, thereby improving the organic carbon source removal rate of the reactor, stabilizing the operating environment of the reactor, enhancing the activity of anaerobic bacteria, and further improving the efficiency of the system.

[0030] In practice, the organic carbon source content of the wastewater is less than or equal to 100 mg / L. In this preferred embodiment, the low-concentration wastewater can effectively reduce the organic load interference in the anaerobic reactor, and help improve the stability of the anaerobic reactor and the carbon source removal effect.

[0031] During the implementation, the anaerobic reactor may include: UASB, IC or EG type reactor. In the preferred embodiment, the anaerobic reactor includes reactors of various types. The method has a wide range of applications and can be applied to reactors of various types.

[0032] As a preferred embodiment, the recycled water pump is a variable frequency pump. The variable frequency pump in this preferred embodiment has the advantage of flexible adjustment, which helps to accurately control the amount of recycled water and improve the control accuracy of the system.

[0033] In practice, the return water inlet pipeline includes a filter device for removing impurities in the water. The filter device can effectively remove suspended matter in the water, reduce the burden of sludge in the reactor, and improve the activity of anaerobic bacteria.

[0034] Preferably, a water quality monitoring device is provided in the reuse water pool for real-time monitoring of water quality. In this preferred embodiment, real-time monitoring of water quality changes helps to adjust water flow and sludge load in a timely manner to ensure that the reactor operates in the best working state.

[0035] As a preferred implementation, the reuse water pool is provided with an automatic cleaning device. The automatic cleaning system in this embodiment can effectively reduce human intervention, improve the automation of the equipment, and reduce maintenance costs.

[0036] In practice, the recycling water pump is provided with a regulating device for controlling the working flow of the recycling water pump, thereby regulating the flow of the return flow. The regulating device can accurately control the water inflow, thereby achieving fine regulation of the anaerobic reactor load, improving the treatment efficiency and avoiding the occurrence of overload.

[0037] Through the above embodiments and their preferred implementation modes, the present application provides a method for improving the carbon source removal rate of an anaerobic reactor. By setting a reuse water pool, a reuse water pump and a pipeline, combined with a precise water flow regulation mechanism, accurate control of the inlet water load is ensured, the ecological environment of the reactor is stabilized, and the activity of anaerobic bacteria is enhanced, thereby improving the removal rate of organic carbon sources.

[0038] The present application solves the problems of load regulation difficulties and ecological environment deterioration in high-concentration wastewater anaerobic reactors when the return water quality fluctuates in the related art. The related art cannot effectively avoid the negative impact of organic carbon sources on anaerobic reactors in traditional return methods, which makes the removal effect of the reactor unstable. In order to solve these problems, the technical solution of the present application introduces low-concentration wastewater to replace traditional return water, thereby avoiding the interference of organic carbon sources in the return water on the reactor ecological environment, thereby improving the organic load removal rate of the reactor.

[0039] Through the technical solution provided by this application, the removal rate of organic carbon sources can be increased from about 74% to 90%. At the same time, while improving the removal rate of organic carbon sources, the biogas production of the anaerobic reactor is also increased, with a theoretical biogas production rate of 0.35m 3 / Kg COD, each kilogram of COD can increase the profit by 0.23 yuan. Based on the company's total organic carbon source of 1,361,308 kg in 2022, it can save 313,300 yuan.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for improving the carbon source removal rate of an anaerobic reactor, characterized in that: include: A reuse water pool is provided, the reuse water pool is located at the rear end of the aerobic system corresponding to the anaerobic reactor, and the reuse water pool collects wastewater treated by the aerobic system; The wastewater is pumped into the return water inlet pipe of the anaerobic reactor through the reuse water pump of the reuse water pool as the effluent return of the anaerobic reactor; The flow rate of the return water of the anaerobic reactor is adjusted to control the water inlet load of the anaerobic reactor.

2. The method according to claim 1, characterized in that The capacity of the recycling water pool can meet the requirement of the return water volume of the anaerobic reactor.

3. The method according to claim 1 or 2, characterized in that: The organic carbon source content of the wastewater is less than or equal to 100 mg / L.

4. The method according to claim 1 or 2, characterized in that: The anaerobic reactor includes an ascending anaerobic sludge blanket reactor UASB, an internal circulation anaerobic reactor IC or an extended granular sludge blanket reactor EG reactor.

5. The method according to claim 1 or 2, characterized in that: The recycled water pump is a variable frequency pump.

6. The method according to claim 1 or 2, characterized in that: The return water inlet pipeline includes a filtering device for removing impurities in the water.

7. The method according to claim 1 or 2, characterized in that: The reuse water pool is provided with water quality monitoring equipment for real-time monitoring of water quality.

8. The method according to claim 1 or 2, characterized in that: The reuse water pool is provided with an automatic cleaning device.

9. The method according to claim 1 or 2, characterized in that: The recycling water pump is provided with a regulating device for controlling the working flow of the recycling water pump, thereby regulating the reflux flow.

Images