Preparation device for hydrolytic acidification carbon source of kitchen waste wastewater

Abstract

The utility model provides a hydrolytic acidification carbon source preparation device for kitchen waste wastewater. The hydrolytic acidification carbon source preparation device comprises a liquid caustic soda tank; an inlet of the kitchen wastewater storage tank is connected with an outlet of the liquid caustic soda tank; an inlet of the hydrolysis tank is respectively connected with an outlet of the kitchen wastewater storage tank and an outlet of the compound enzyme tank; the inlet of the acidification tank is connected with the outlet of the hydrolysis tank; the inlet of the carbon source storage tank is connected with the outlet of the two-phase centrifugal machine. Through hydrolytic acidification treatment of kitchen waste wastewater, kitchen waste can be effectively converted into substances rich in carbon sources, the problem of insufficient carbon sources in the sewage treatment process of a sewage treatment plant is solved, and the wastewater treatment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of restaurant wastewater treatment, in particular to a device for preparing a carbon source by hydrolyzing and acidifying restaurant wastewater. Background Art

[0002] The rational treatment and disposal of food waste has become an important issue that needs to be solved in urban environmental governance. Although traditional food waste treatment methods, such as landfill, incineration and composting, have achieved the goal of waste reduction and harmlessness to a certain extent, these methods all have obvious limitations.

[0003] When landfilling kitchen waste, not only does it occupy a large amount of precious land resources, but the leachate and odor pollution problems are becoming increasingly serious, which has brought great pressure to the surrounding environment and is difficult to meet the urgent needs of modern cities for sustainable development. Although incineration can effectively reduce the volume of garbage, the high water content and low calorific value of kitchen waste lead to high treatment costs, and secondary pollution is easily generated during the treatment process, such as fly ash and toxic gases, which cause further damage to the environment. Although composting treatment has achieved the resource utilization of kitchen waste, due to the possible excessive heavy metals and pathogen contamination in kitchen waste, the quality and application scope of compost products are severely limited, making it difficult to promote on a large scale.

[0004] At the same time, my country's sewage treatment plants are generally facing the dilemma of lack of carbon sources. In the sewage treatment process, in order to improve the biological treatment effect, it is often necessary to add additional carbon sources. Especially with the increasingly stringent environmental protection standards, the requirements for sewage treatment effects are getting higher and higher, and the demand for carbon sources is also increasing. Utility Model Content

[0005] The utility model aims to provide a device for preparing a carbon source by hydrolyzing and acidifying kitchen waste water, so as to solve many negative problems brought about by kitchen waste treatment in the prior art, and at the same time solve the problem of the carbon source source of the sewage treatment plant, thereby reducing the cost of wastewater treatment.

[0006] In order to solve the above technical problems, the specific technical scheme of the hydrolysis and acidification carbon source preparation device of the utility model is as follows:

[0007] A device for preparing a carbon source by hydrolyzing and acidifying kitchen waste water, comprising:

[0008] Liquid caustic soda tank;

[0009] A kitchen wastewater storage tank, wherein the inlet of the kitchen wastewater storage tank is connected to the outlet of the liquid alkali tank;

[0010] A hydrolysis tank, the inlet of which is connected to the outlet of the kitchen wastewater storage tank and the outlet of the composite enzyme tank respectively;

[0011] an acidification tank, wherein the inlet of the acidification tank is connected to the outlet of the hydrolysis tank;

[0012] A two-phase centrifuge, wherein the inlet of the two-phase centrifuge is connected to the outlet of the acidification tank;

[0013] A carbon source storage tank, wherein the inlet of the carbon source storage tank is connected to the outlet of the two-phase centrifuge.

[0014] Optionally, the liquid alkali tank, the kitchen wastewater storage tank, the hydrolysis tank, the complex enzyme tank, the acidification tank, and the two-phase centrifuge are all connected via a hydraulic transmission assembly.

[0015] Optionally, a pH value online monitoring device is connected to the bottom of the kitchen waste water storage tank, the pH value online monitoring device is connected to a controller, and the controller is connected to the hydraulic transmission assembly connected to the liquid alkali tank.

[0016] Optionally, a central agitator is installed inside the hydrolysis tank.

[0017] Optionally, the hydrolysis tank is provided with an ultrasonic generator and an ultrasonic vibration plate assembly; the ultrasonic generator is electrically connected to the ultrasonic vibration plate assembly.

[0018] Optionally, the ultrasonic vibration plate assembly includes a plurality of immersion-type ultrasonic vibration plates; the plurality of immersion-type ultrasonic vibration plates are evenly arranged on the inner wall of the hydrolysis tank in a circumferential direction; each of the immersion-type ultrasonic vibration plates is composed of twenty-two ultrasonic vibrators.

[0019] Optionally, a heating coil is wound around the outside of the hydrolysis tank.

[0020] Optionally, the biogas slurry at the bottom of the acidification tank is pumped out from one side of the acidification tank through a circulation pump and a plurality of pipelines and pumped into the acidification tank from the upper, middle and lower parts of the other side of the acidification tank respectively.

[0021] Optionally, the other outlet of the two-phase centrifuge is connected to the hopper via a belt conveyor.

[0022] Optionally, a temperature measuring component is provided on one side of the hydrolysis tank and the acidification tank.

[0023] The beneficial effects of the hydrolysis and acidification carbon source preparation device for kitchen waste water provided in the present application are:

[0024] The utility model can effectively convert the kitchen waste into carbon-rich substances through the hydrolysis and acidification treatment of kitchen waste wastewater, solve the problem of insufficient carbon sources in the sewage treatment process of the sewage treatment plant, and reduce the cost of wastewater treatment. At the same time, the device can also effectively treat kitchen waste, avoid pollution to the environment, and thus realize the resource utilization of kitchen waste.

[0025] Secondly, the utility model installs a central stirrer and an immersion ultrasonic vibration plate in the hydrolysis tank, which can promote the full mixing of wastewater and compound enzymes and improve the hydrolysis efficiency. At the same time, the heating coil outside the hydrolysis tank can keep the tank temperature constant, which is conducive to the hydrolysis reaction.

[0026] In addition, the utility model extracts the biogas slurry at the bottom of the acidification tank through a circulation pump and multiple pipelines and returns it from the upper, middle and lower parts of the acidification tank respectively. This circulation method can improve the mixing uniformity of the biogas slurry and wastewater and promote the acidification reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of a device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to the utility model.

[0028] Description of the markings in the figure:

[0029] 1. Liquid alkali tank; 11. Hydraulic pump; 2. Kitchen wastewater storage tank; 21. Hydraulic pump; 3. Hydrolysis tank; 31. Hydraulic pump; 32. Heating coil; 4. Composite enzyme tank; 41. Hydraulic pump; 5. Acidification tank; 51. Hydraulic pump; 511. Pipeline; 512. Hydraulic pump; 6. Two-phase centrifuge; 61. Belt conveyor; 62. Hopper; 7. Carbon source storage tank. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] like Figure 1 As shown, a device for preparing a carbon source by hydrolyzing and acidifying kitchen waste water provided in an embodiment of the present application comprises:

[0035] Liquid alkali tank 1;

[0036] A kitchen wastewater storage tank 2, wherein the inlet of the kitchen wastewater storage tank 2 is connected to the outlet of the liquid alkali tank 1;

[0037] A hydrolysis tank 3, the inlet of which is connected to the outlet of the kitchen waste water storage tank 2 and the outlet of the compound enzyme tank 4 respectively;

[0038] an acidification tank 5, the inlet of the acidification tank 5 being connected to the outlet of the hydrolysis tank 3;

[0039] A two-phase centrifuge 6, wherein the inlet of the two-phase centrifuge 6 is connected to the outlet of the acidification tank 5;

[0040] A carbon source storage tank 7, the inlet of which is connected to the outlet of the two-phase centrifuge 6.

[0041] The utility model provides a device for preparing a carbon source by hydrolyzing and acidifying kitchen waste water, which is more

[0042] The utility model connects the components such as the liquid alkali tank 1, the restaurant wastewater storage tank 2, the hydrolysis tank 3, the acidification tank 5, the two-phase centrifuge 6 and the carbon source storage tank 7, so that the outlet of the liquid alkali tank 1 is connected to the inlet of the restaurant wastewater storage tank 2, thereby providing an alkaline environment for the restaurant wastewater, which is beneficial to the subsequent acidification treatment. The inlet of the hydrolysis tank 3 is respectively connected to the outlets of the restaurant wastewater storage tank 2 and the compound enzyme tank 4, so that the restaurant wastewater is hydrolyzed under the action of the compound enzyme, and the organic matter is converted into a form that is easier to handle. The acidification tank 5 is responsible for acidifying the wastewater after hydrolysis to further decompose the organic matter. Finally, the two-phase centrifuge 6 performs solid-liquid separation on the acidified wastewater, and the obtained carbon source is stored in the carbon source storage tank 7.

[0043] In another embodiment of the present application, Figure 1 As shown, the liquid alkali tank 1, the kitchen waste water storage tank 2, the hydrolysis tank 3, the complex enzyme tank 4, the acidification tank 5, the two-phase centrifuge 6, and the carbon source storage tank 7 are all connected by a hydraulic transmission assembly. The introduction of the hydraulic transmission assembly improves the overall operating efficiency and automation level of the device. The hydraulic transmission assembly, with its stable, continuous and easy-to-control characteristics, makes the material transmission between the components smoother, and reduces the material leakage or blockage caused by mechanical friction or improper operation. At the same time, the hydraulic transmission assembly can also realize remote control and automatic operation, reducing the frequency of manual intervention and improving work efficiency. Secondly, the use of the hydraulic transmission assembly enhances the safety and reliability of the device. The hydraulic transmission system usually has functions such as overload protection and pressure control, which can effectively prevent equipment damage or safety accidents caused by excessive pressure or operating errors. In addition, the sealing performance of the hydraulic transmission assembly is good, which can effectively prevent the leakage of exhaust gas and wastewater and reduce pollution to the environment. Finally, the connection method of the hydraulic transmission assembly is also convenient for the maintenance and management of the equipment. The hydraulic transmission assembly usually has a modular design, which makes the installation, commissioning and maintenance of the equipment more convenient. Specifically, the hydraulic transmission component can be a volumetric pump or a dynamic pump, and the liquid to be transported in the utility model is transported by the pump.

[0044] In another embodiment of the present application, Figure 1 As shown, a pH value online monitoring device is connected to the bottom of the kitchen wastewater storage tank 2, and the pH value online monitoring device is connected to a controller, and the controller is connected to a hydraulic transmission component connected to the liquid alkali tank 1. The pH value online monitoring device is used to monitor the pH value of the wastewater in the kitchen wastewater storage tank 2 and adjust the amount of liquid alkali added in time.

[0045] In another embodiment of the present application, the compound enzyme tank 4 uses protease and amylase, wherein the ratio of protease to amylase is 10:1. Protease is mainly responsible for decomposing protein, while amylase focuses on decomposing starch. When the two are mixed and used in a ratio of 10:1, complex substances containing both protein and starch can be efficiently processed, thereby improving the efficiency and quality of the entire reaction process.

[0046] In another embodiment of the present application, Figure 1 As shown, a central agitator is installed inside the hydrolysis tank 3 to achieve a completely mixed state of the substances in the hydrolysis tank 3. First, the central agitator can evenly mix the sludge and wastewater, increase the contact area between the microorganisms and the wastewater, and thus accelerate the rate of the hydrolysis reaction. During the hydrolysis process, the microorganisms use organic waste as food to produce acid and gas. The presence of the agitator enables the microorganisms to contact the organic waste more effectively and improve the reaction efficiency. Secondly, the central agitator helps to maintain the equilibrium state in the hydrolysis reaction and prevent sludge precipitation. Sludge precipitation will reduce the contact efficiency between the microorganisms and the wastewater and affect the reaction. The continuous stirring action of the central agitator can prevent this from happening and maintain the uniformity and stability of the reaction system. In addition, the central agitator can also enhance the mixing effect and make the sewage and sludge mixed more evenly. The role of the central agitator is particularly important when treating high-concentration organic pollutants. High-concentration organic matter may cause uneven reactions, form unstable substances, and reduce treatment efficiency. The presence of a central agitator can effectively solve this problem and improve treatment efficiency.

[0047] In another embodiment of the present application, Figure 1 As shown, the hydrolysis tank 3 is provided with an ultrasonic generator 81 and an ultrasonic vibration plate assembly 82 ; the ultrasonic generator 81 is electrically connected to the ultrasonic vibration plate assembly 82 .

[0048] In another embodiment of the present application, Figure 1As shown, the inner wall of the hydrolysis tank 3 is evenly installed with 4 immersion ultrasonic vibration plates, each of which is composed of 22 ultrasonic vibrators. First, the immersion ultrasonic vibration plate generates strong ultrasonic vibrations through its ultrasonic vibrators, and these vibrations can directly act on the liquid and sludge mixture in the hydrolysis tank 3. The energy of ultrasound can destroy the structure of sludge and organic matter, making it easier to be decomposed by microorganisms, thereby accelerating the hydrolysis process. Secondly, the vibration effect of ultrasound can also promote the formation and rupture of tiny bubbles in the liquid, increase the surface area of ​​the liquid, and further improve the contact efficiency between microorganisms and organic matter. This effect not only helps to speed up the hydrolysis rate, but also improves the thoroughness of the hydrolysis reaction and reduces the unreacted organic matter residue. In addition, the four immersion ultrasonic vibration plates evenly installed on the inner wall of the hydrolysis tank 3 ensure the uniform distribution of ultrasonic energy in the tank. This allows the hydrolysis reaction to be carried out simultaneously in the entire tank body, avoiding the situation of excessive or insufficient local reaction, and further improving the uniformity and efficiency of hydrolysis.

[0049] In another embodiment of the present application, Figure 1 As shown, a heating coil 32 is wound around the outside of the tank body of the hydrolysis tank 3, and the heating coil 32 can be used to heat the mixed material in the hydrolysis tank 3. Specifically, when it is necessary to increase the temperature in the hydrolysis tank 3, the heating system of the heating coil 32 can be started to circulate the heat medium in the coil and transfer the heat to the tank body of the hydrolysis tank 3. After the tank body of the hydrolysis tank 3 is heated, the mixed material inside it will also be heated accordingly, so as to reach the required reaction temperature. In addition, by circumferentially winding the hydrolysis tank 3, the heating efficiency of the hydrolysis tank can be effectively improved under the premise of ensuring the uniformity of temperature distribution.

[0050] In another embodiment of the present application, Figure 1 As shown, one side of the acidification tank 5 extracts the biogas slurry at the bottom of the acidification tank 5 through a circulation pump 512 and a plurality of pipelines 511 and pumps the biogas slurry into the acidification tank 5 from the upper, middle and lower parts of the other side of the acidification tank 5. Specifically, the circulation pump 512 serves as a power source to extract the biogas slurry at the bottom of the acidification tank 5 through the pipeline 511. Subsequently, the biogas slurry is pumped into the upper, middle and lower parts of the acidification tank 5 through different pipelines 511. Such operation not only ensures the uniform distribution of the biogas slurry in the tank, but also effectively prevents the deposition of sludge at the bottom of the tank through the flow and mixing of the biogas slurry.

[0051] In another embodiment of the present application, Figure 1 As shown, the other outlet of the two-phase centrifuge 6 is connected to the hopper 62 via a belt conveyor 61. The connection between the other outlet of the two-phase centrifuge 61 and the hopper 62 via the belt conveyor 61 can ensure that the material can be quickly and smoothly transferred to the hopper after centrifugal separation.

[0052] In another embodiment of the present application, Figure 1 As shown, the acidification tank 5 can also be surrounded by a heating pipe, so that the acidification tank 5 can perform constant temperature fermentation in an anaerobic environment at a temperature of 37°C.

[0053] In addition to the above embodiments, the utility model also has the following working method:

[0054] First, the hydraulic pump 2 connected to the liquid alkali tank 1 is started to pump the NaOH solution into the restaurant wastewater storage tank 3 to adjust the pH value of the wastewater in the restaurant wastewater storage tank 3 to 7.0±0.2. In this process, the pH value of the wastewater is monitored in real time by the pH value online monitoring device, and the amount of the NaOH solution is adjusted in real time according to the test value to ensure the accuracy of the pH value.

[0055] Next, the pH-adjusted kitchen waste water and the composite enzyme (including protease and amylase) are pumped into the hydrolysis tank 3 through the hydraulic pump 31 and the hydraulic pump 41, respectively. At this time, the ultrasonic device, which is composed of an ultrasonic generator 81 and an ultrasonic vibration plate 82, is turned on to perform ultrasonic treatment on the waste water in the hydrolysis tank 3 for 10 minutes. Ultrasonic treatment helps to destroy the macromolecular structure in the waste water, making it easier to be decomposed by enzymes.

[0056] Then, the temperature in the hydrolysis tank 3 is set to 55°C and the constant temperature is maintained for 6 hours. During this period, the protease and amylase in the complex enzyme will act on the protein and starch in the wastewater respectively, decomposing them into small molecules, thereby achieving the initial hydrolysis of the food waste wastewater.

[0057] After the hydrolysis is completed, the wastewater after hydrolysis is transported to the acidification tank 5 by the hydraulic pump 31, and the temperature is set to 37° C. for acidification treatment for 3 days. The acidification process helps to further decompose the organic matter in the wastewater and produce more carbon source substances.

[0058] The acidified wastewater is then transported to the feed end of the two-phase centrifuge 61 by a hydraulic pump 51 for centrifugal separation. During the centrifugal separation process, the wastewater is divided into two parts: a liquid phase and a solid phase. The liquid phase is rich in carbon source substances and is pumped into a carbon source storage tank by a hydraulic pump 63 for temporary storage, and can be used for aerobic biochemical treatment of sewage later. The solid phase is mainly residue, which is connected to the hopper 62 by a belt conveyor 61 for further disposal, such as incineration or composting.

[0059] By means of the device for preparing carbon source by hydrolyzing and acidifying kitchen waste water and the working method thereof of the utility model, kitchen waste water can be effectively converted into a substance rich in carbon source, thus realizing resource recovery and utilization and reducing environmental pollution.

[0060] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for preparing a carbon source by hydrolysis and acidification of kitchen waste water, characterized in that: include: Liquid caustic soda tank; A kitchen wastewater storage tank, wherein the inlet of the kitchen wastewater storage tank is connected to the outlet of the liquid alkali tank; A hydrolysis tank, the inlet of which is connected to the outlet of the kitchen wastewater storage tank and the outlet of the composite enzyme tank respectively; an acidification tank, wherein the inlet of the acidification tank is connected to the outlet of the hydrolysis tank; A two-phase centrifuge, wherein the inlet of the two-phase centrifuge is connected to the outlet of the acidification tank; A carbon source storage tank, wherein the inlet of the carbon source storage tank is connected to the outlet of the two-phase centrifuge.

2. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: The liquid alkali tank, the kitchen wastewater storage tank, the hydrolysis tank, the composite enzyme tank, the acidification tank, the two-phase centrifuge, and the carbon source storage tank are all connected through a hydraulic transmission component.

3. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 2, characterized in that: A pH value online monitoring device is connected to the bottom of the kitchen wastewater storage tank, and the pH value online monitoring device is connected to a controller, and the controller is connected to the hydraulic transmission component connected to the liquid alkali tank.

4. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: A central agitator is installed inside the hydrolysis tank.

5. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: The hydrolysis tank is provided with an ultrasonic generator and an ultrasonic vibration plate assembly; the ultrasonic generator is electrically connected to the ultrasonic vibration plate assembly.

6. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 5, characterized in that: The ultrasonic vibration plate assembly comprises a plurality of immersion-type ultrasonic vibration plates; the plurality of immersion-type ultrasonic vibration plates are evenly arranged on the inner wall of the hydrolysis tank in a circumferential direction; each of the immersion-type ultrasonic vibration plates is composed of twenty-two ultrasonic vibrators.

7. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: A heating coil is wound around the outside of the hydrolysis tank body.

8. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: The bottom biogas slurry of the acidification tank is pumped out from one side of the acidification tank through a circulation pump and a plurality of pipelines and pumped into the acidification tank from the upper, middle and lower parts of the other side of the acidification tank respectively.

9. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: The other outlet of the two-phase centrifuge is connected to a hopper via a belt conveyor.

10. The device for preparing a carbon source by hydrolysis and acidification of kitchen waste water according to claim 1, characterized in that: A temperature measuring component is provided on one side of the hydrolysis tank and the acidification tank.

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