Kitchen waste water efficient utilization treatment equipment and method

Abstract

The application discloses a kind of kitchen waste water efficient utilization processing equipment and method, solve the problem of low resource utilization rate of kitchen waste water in prior art, with the beneficial effect of fully resource utilization available material in kitchen waste water, specific scheme is as follows: a kind of kitchen waste water efficient utilization processing equipment, including the ammonia reactor, sedimentation tank, intermediate water pool and evaporator connected in sequence, sedimentation tank is connected with anaerobic reactor tank to ferment and produce methane, the water outlet of anaerobic reactor tank is connected with first centrifugal machine, first centrifugal machine is connected with intermediate water pool, thickening system of concentrated liquid respectively, supernatant precipitated by sedimentation tank and centrifugal effluent after first centrifugal machine enter intermediate water pool respectively, the water outlet of intermediate water pool enters evaporator and is evaporated and concentrated, evaporator is connected with ammonia recovery system to produce nitrogen fertilizer by recovering ammonia gas, thickening system of concentrated liquid includes spraying mechanism and mixer, to produce main raw material for insect breeding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen waste water treatment, and particularly relates to a kitchen waste water efficient utilization treatment equipment and method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] Kitchen waste water is a kind of high-concentration organic waste water with high pollutant content, wherein the chemical oxygen demand COD of the kitchen waste water is about 100,000 mg / L, the ammonia nitrogen is about 600 mg / L, and the total nitrogen is about 2500 mg / L, the inventor finds that the high-concentration organic kitchen waste water in the previous treatment route only utilizes the organic matter in the waste water to produce methane, and the remaining substances are not utilized as resources, which not only causes high treatment cost, difficulty in upgrading, and the like, but also causes great waste of resources.

[0004] Moreover, the existing treatment method produces waste water with low water quality standard, which cannot be reused.

[0005] In addition, the existing treatment method produces concentrated liquid, and the treatment method of the concentrated liquid is unreasonable, so that the treatment cost of the concentrated liquid is high. SUMMARY

[0006] In view of the deficiencies in the prior art, the purpose of the present application is to provide a kitchen waste water efficient utilization treatment equipment, which can fully utilize the available substances in the kitchen waste water as resources, can produce methane and nitrogen fertilizer, and can produce main raw materials for insect breeding.

[0007] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0008] A kitchen waste water efficient utilization treatment equipment, comprising an ammoniation reactor, a sedimentation tank, an intermediate water pool and an evaporator connected in sequence, the sedimentation tank is connected with an anaerobic reactor tank to produce methane by fermentation, the water outlet end of the anaerobic reactor tank is connected with a first centrifugal machine, the first centrifugal machine is connected with the intermediate water pool and a concentrated liquid thickening system respectively, the supernatant precipitated by the sedimentation tank and the centrifugal water outlet after passing through the first centrifugal machine enter the intermediate water pool respectively, the water outlet of the intermediate water pool enters the evaporator to evaporate and concentrate, the evaporator is connected with an ammonia recovery system to manufacture nitrogen fertilizer by recovering ammonia gas, the concentrated liquid thickening system comprises a spraying mechanism and a mixer, the spraying mechanism is arranged above the mixer, the evaporator is connected with the spraying mechanism to provide concentrated liquid to the spraying mechanism, the first centrifugal machine provides sludge discharge to the concentrated liquid thickening system, and the mixer mixes the concentrated liquid and the dried sludge discharge to produce main raw materials for insect breeding.

[0009] The kitchen waste water efficient utilization treatment equipment as described above, the anaerobic reactor is connected with the concentrated liquid thickening system, so that the sludge generated by the anaerobic reactor is discharged into the concentrated liquid thickening system, and the organic matter in the sludge generated by the anaerobic reactor is utilized.

[0010] The kitchen waste water efficient utilization treatment equipment as described above, the anaerobic reactor is connected with the methane purification energy system, the first outlet end of the methane purification energy system is connected with the ammonia recovery system, so that the carbon dioxide energy is provided to the ammonia recovery system, and the preparation of nitrogen fertilizer is facilitated.

[0011] The second outlet end of the methane purification energy system is connected with the evaporator, so that the methane is provided to the evaporator, and the energy self-sufficiency of the process system is realized.

[0012] The kitchen waste water efficient utilization treatment equipment as described above, the ammonia recovery system comprises an ammonia recovery tower for recovering the ammonia gas in the steam generated by the evaporator, the ammonia gas reacts with the carbon dioxide to generate ammonium bicarbonate, and the ammonium bicarbonate is the nitrogen fertilizer.

[0013] The kitchen waste water efficient utilization treatment equipment as described above, the condensate water outlet end of the ammonia recovery system is connected with the water treatment biochemical system to remove part of the organic matter, the water treatment biochemical system is connected with the membrane bioreactor, the solid outlet end of the membrane bioreactor is connected with the concentrated liquid thickening system to provide sludge to the concentrated liquid thickening system, and the liquid outlet end of the membrane bioreactor provides water source to the ecological farm, and the resource utilization is further realized.

[0014] The kitchen waste water efficient utilization treatment equipment as described above, the water treatment biochemical system comprises a first aerobic tank for reducing the organic matter content of the water inlet of the water treatment biochemical system and converting residual ammonia nitrogen into nitrate nitrogen, the first aerobic tank is connected with a hydrolysis acidification tank to improve the biodegradability of the wastewater, the hydrolysis acidification tank is connected with an anoxic tank to remove nitrogen from the wastewater, and the anoxic tank is connected with a second aerobic tank to further remove organic matter. Through the arrangement of the first aerobic tank, the hydrolysis acidification tank, the anoxic tank and the second aerobic tank, the wastewater can be effectively treated, the nitrogen can be removed from the wastewater, and the organic matter can be removed, so that the water requirement of the ecological farm is met.

[0015] The kitchen waste water efficient utilization treatment equipment as described above, a first pipeline is arranged between the gas outlet end of the ammonia recovery system and the ammoniation reactor, and a second pipeline is arranged between the gas outlet end of the ammonia recovery system and the sedimentation tank. The ammonia recovery system provides waste heat to the ammoniation reactor and the sedimentation tank through the first pipeline and the second pipeline, respectively.

[0016] The ammoniation reactor is connected with the kitchen waste water collection port through a circulating pump.

[0017] The kitchen waste water efficient utilization processing equipment as described above, the first stirring mechanism is arranged in the intermediate pool;

[0018] The thickening system of the concentrated liquid comprises a sludge pool, a second stirring mechanism is arranged in the sludge pool, the sludge pool is connected with the second centrifugal machine, the liquid outlet end of the second centrifugal machine is connected with the intermediate pool, the solid outlet end of the second centrifugal machine is connected with the drying machine, the mixer is connected with the drying machine, and the mixer is connected with the buffer box.

[0019] The kitchen waste water efficient utilization processing equipment as described above further comprises a PH adjusting system connected with the intermediate pool to adjust the PH value of water in the intermediate pool.

[0020] The PH adjusting system is further connected with the anaerobic reaction tank to adjust the PH of the anaerobic reaction tank.

[0021] In the second aspect, the application further provides a kitchen waste water efficient utilization method, which adopts the kitchen waste water efficient utilization processing equipment and comprises the following contents.

[0022] The kitchen waste water enters the ammoniation reactor to react, and organic nitrogen in the kitchen waste water is dissolved and converted into ammonia nitrogen.

[0023] After the kitchen waste water is reacted in the ammoniation reactor, the kitchen waste water enters the sedimentation pool and stays for a set time.

[0024] The supernatant after precipitation enters the intermediate pool, and the precipitate is pumped into the anaerobic reaction tank to obtain mixed gas containing methane.

[0025] The effluent of the anaerobic reaction tank is centrifuged by the first centrifugal machine, the centrifuged effluent enters the intermediate pool, and the centrifuged effluent is mixed with the effluent of the sedimentation pool in the intermediate pool.

[0026] The effluent of the intermediate pool enters the evaporator, is concentrated by evaporation of the evaporator, and part of phosphorus resources and organic matter resources in the waste water are concentrated to form concentrated liquid, and nitrogen resources escape in the form of ammonia gas and steam into the ammonia recovery system.

[0027] The ammonia recovery system recovers ammonia gas and produces nitrogen fertilizer.

[0028] The first centrifugal machine provides sludge to the thickening system of the concentrated liquid, the thickening system of the concentrated liquid provides main raw materials for insect breeding auxiliary materials, the insect breeding auxiliary materials are used for insect breeding, nitrogen fertilizer produced by the ammonia recovery system and insects and insect sand produced by insect breeding enter the ecological farm.

[0029] The beneficial effects of the application are as follows:

[0030] 1) The anaerobic reactor in this invention can ferment and produce methane, and recover methane energy. The centrifugal water from the first centrifuge and the supernatant in the sedimentation tank can both enter the intermediate water tank. The water from the intermediate water tank enters the evaporator for evaporation and concentration. The gas produced by the evaporator enters the ammonia recovery system. Nitrogen fertilizer is prepared through the ammonia recovery system, and the ammonia nitrogen element in the kitchen wastewater is utilized as a resource. The sludge discharged from the first centrifuge can enter the thickening system of the concentrate. The sludge contains a large amount of organic matter. The sludge and the evaporator are used to produce the main raw materials for insect breeding, so that the substances in the kitchen wastewater are basically utilized as resources.

[0031] 2) In this invention, the reaction temperature of the ammoniation reactor is controlled to increase the ammonia nitrogen load of the evaporator influent; by controlling the pH of the evaporator influent, the total nitrogen in the steam generated by the evaporator is almost entirely in the form of ammonia nitrogen. Then, through the ammonia recovery system and the water treatment biochemical system, the nitrogen is efficiently recovered and removed, with a removal rate of over 99.95%, achieving a total nitrogen level in the effluent that is lower than the Class V standard for surface water.

[0032] 3) In this invention, kitchen wastewater first passes through an ammoniation reactor, and high-speed circulation of the wastewater can be achieved through a circulation pump. The waste heat is utilized by an ammonia recovery system, and the temperature inside the ammoniation reactor is controlled within a set range. This achieves low-cost and efficient degradation of organic nitrogen in kitchen wastewater, increases ammonia nitrogen in the wastewater, reduces colloidal substances in the wastewater, and improves sedimentation efficiency.

[0033] 4) In this invention, the effluent from the ammoniation reactor enters the sedimentation tank, where natural sedimentation can achieve low-cost, drug-free solid-liquid separation, providing high-quality auxiliary materials for the subsequent insect breeding process. At the same time, it increases the organic load of the anaerobic reactor's influent without increasing operating costs, thereby improving the gas production per unit volume of the anaerobic reactor.

[0034] 5) In this invention, the anaerobic reactor is connected to the first centrifuge, and physical centrifugation can be used to separate the components. This not only improves the evaporation efficiency of the downstream evaporator, but also ensures that the product of the concentrated liquid thickening system is never treated with chemicals, thus ensuring that the insect farming process is always in a stable operating state.

[0035] 6) The pH adjustment system in this invention can control the pH of the evaporator inlet water within the range of 7-9, and control the suspended solids in the inlet water to be less than 500mg / L, so that the evaporator is always in a high-efficiency evaporation state. At the same time, it greatly increases the amount of ammonia nitrogen in the steam and reduces the organic matter content in the steam. The evaporator is powered by methane produced by fermentation in the anaerobic reactor, so as to achieve energy self-sufficiency of the process system and realize the "zero energy consumption" operation of the evaporator.

[0036] 7) The operation of the thickening system of the concentrated liquid in the application utilizes the characteristics of the biochemical sludge, such as thick, strong adsorption capacity, to coagulate and thicken the concentrated liquid, which is used as a supplementary material for insect breeding, so that the concentrated liquid produced by the high-efficiency evaporator can be resourceized, thereby reducing the disposal cost of the biochemical sludge and the concentrated liquid and reducing the operation cost.

[0037] 8) The method of the application provides an ecological farm for the construction of a resource system, the nitrogen fertilizer produced by the system is used for land farming in the ecological farm, the high-protein product obtained by insect breeding is used for aquatic or livestock and poultry breeding feed in the ecological farm, and the system drainage is used for daily planting and breeding water in the ecological farm, so as to realize full resourceization treatment and "zero cost" treatment of kitchen waste water. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, the illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application.

[0039] Figure 1 is a schematic diagram of a kitchen waste water efficient utilization treatment equipment according to one or more embodiments of the application.

[0040] In the drawings: the mutual distance or size is exaggerated to show the position of each part, and the schematic diagram is only schematic. DETAILED DESCRIPTION

[0041] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise indicated, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0042] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the application. As used herein, unless otherwise explicitly stated in the application, the singular form is also intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they mean the presence of a feature, step, operation, device, component and / or combination thereof;

[0043] As introduced in the background, the utilization rate of kitchen waste water in the prior art is low, in order to solve the above technical problems, the application provides a kitchen waste water efficient utilization treatment equipment.

[0044] Example 1

[0045] In a typical embodiment of the application, with reference to Figure 1As shown, a kind of kitchen waste water efficient utilization processing equipment, including ammonia reactor, sedimentation tank, intermediate pool and evaporator connected in turn, sedimentation tank is connected with anaerobic reactor to ferment and produce methane, the water outlet of anaerobic reactor is connected with first centrifuge, first centrifuge is connected with intermediate pool, thickening system of concentrated liquid respectively, supernatant precipitated by sedimentation tank and centrifugal effluent after first centrifuge respectively enter intermediate pool, the water outlet of intermediate pool enters evaporator and is concentrated by evaporation, evaporator is connected with ammonia recovery system to manufacture nitrogen fertilizer by recovering ammonia gas, thickening system of concentrated liquid includes spraying mechanism and mixer, spraying mechanism is located above mixer, evaporator is connected with spraying mechanism to provide concentrated liquid to spraying mechanism, first centrifuge provides sludge to thickening system of concentrated liquid, mixer mixes concentrated liquid and dry sludge, so that thickening system of concentrated liquid provides main raw material of insect breeding auxiliary material, insect breeding auxiliary material is used for insect breeding, nitrogen fertilizer produced by ammonia recovery system, insect and insect sand produced by insect breeding enter ecological farm.

[0046] In addition, anaerobic reactor is connected with concentrated liquid thickening system, so that sludge produced by anaerobic reactor is discharged into concentrated liquid thickening system.

[0047] Anaerobic reactor is the existing common anaerobic reactor, anaerobic reactor is connected with methane purification energy system, the first outlet end of methane purification energy system is connected with ammonia recovery system to provide carbon dioxide energy to ammonia recovery system, the second outlet end of methane purification energy system is connected with evaporator to provide energy, i.e. methane, used by evaporator, so that process system energy is self-sufficient, and evaporator is operated with "zero energy consumption".

[0048] Need to be explained, ammonia reactor is the existing common ammonia reactor, kitchen waste water enters ammonia reactor to react, organic nitrogen in kitchen waste water is dissolved and converted into ammonia nitrogen, the outlet end of ammonia reactor is higher than sedimentation tank, so that waste water flows into sedimentation tank, ammonia reactor is connected with kitchen waste water collecting port by circulating pump to realize the circulation of kitchen waste water in ammonia reactor, kitchen waste water collecting port includes collecting box, collecting box is provided with cover body, cover body is openable relative to collecting box, collecting box is provided with collecting groove, the bottom of collecting groove is trumpet-shaped.

[0049] Wherein, sedimentation tank is gravity type sedimentation tank, sedimentation tank is higher than intermediate pool to facilitate supernatant after precipitation to flow into intermediate pool, in addition, intermediate pool is connected with evaporator by pump to pump water outlet of intermediate pool into evaporator, evaporator uses the existing high-efficiency evaporator, the concentration multiple of evaporator is controlled to be about 15 times, after being concentrated by evaporator, concentrated liquid is mixed and thickened with sludge of anaerobic reactor and sludge of water treatment biochemical system, and as insect breeding auxiliary material after mixing with part of auxiliary material due to containing a large amount of organic matter and other nutrients.

[0050] It is easy to understand that the intermediate water tank is a water tank with a set height, a first stirring mechanism is arranged in the intermediate water tank, the first stirring mechanism can be an existing liquid stirring mechanism, the centrifugal water of the first centrifuge is pumped into the intermediate water tank, and the centrifugal water entering the intermediate water tank is mixed with the water outlet of the gravity type sedimentation tank in the intermediate water tank, and the mixed water can be uniformly stirred by the first stirring mechanism; the intermediate water tank is connected with the evaporator through the sewage submersible pump.

[0051] It needs to be explained that the thickening system of concentrated liquid includes a sludge tank, a second stirring mechanism is arranged in the sludge tank, the second stirring mechanism is a mechanism for stirring slurry, the sludge tank is connected with the second centrifuge, the second centrifuge performs solid-liquid separation on the mixed biological sludge in the sludge tank, the liquid outlet end of the second centrifuge is connected to the intermediate water tank, the solid outlet end of the second centrifuge is connected with the drying machine, a feeding mechanism is arranged between the drying machine and the mixer, the feeding mechanism can be a spiral conveying mechanism, a spraying mechanism is arranged at the top of the mixer, the spraying mechanism is connected with the concentrated liquid outlet end of the evaporator, so that the concentrated liquid is sprayed on the surface of the dried sludge, the mixer uniformly mixes the concentrated liquid, the dried sludge, the bacteria and the auxiliary materials, and the outlet end of the mixer is connected with the buffer box, which stores the insect breeding auxiliary materials for insect breeding.

[0052] In this embodiment, the first centrifuge and the second centrifuge both adopt physical centrifugal separation, which is beneficial to subsequent insect breeding.

[0053] It is easy to understand that the drying machine can be an existing slurry drying device, and the mixer is also an existing device. The spraying mechanism specifically includes a plurality of nozzles installed above the mixer. The height between the spraying mechanism and the mixer is between 0.5-1.5 m. The diameter covered by the nozzles is less than the diameter of the mixer. The concentrated liquid is sprayed through the nozzles, and the spraying of the concentrated liquid is avoided as much as possible.

[0054] It needs to be explained that the methane purification energy system is an existing methane purification energy system, which can extract methane from the mixed gas generated by the anaerobic reaction tank. Carbon dioxide is generated during the extraction process.

[0055] In addition, the ammonia recovery system includes an existing ammonia recovery tower, which recovers ammonia gas in the steam generated by the evaporator. The ammonia gas reacts with carbon dioxide to produce ammonium bicarbonate, which is a nitrogen fertilizer.

[0056] In addition, the condensate outlet end of the ammonia recovery system is connected with the water treatment biochemical system (OAAO system) to remove part of the organic matter. The water treatment biochemical system is connected with the membrane bioreactor, the solid outlet end of the membrane bioreactor is connected with the thickening system of concentrated liquid to provide sludge to the thickening system of concentrated liquid, and the liquid outlet end of the membrane bioreactor provides water source to the ecological farm.

[0057] In the embodiment, the water treatment biochemical system comprises a first aerobic tank to reduce the organic matter content of the water treatment biochemical system and convert residual ammonia nitrogen into nitrate nitrogen, the first aerobic tank is connected with a hydrolysis acidification tank to improve the biodegradability of the wastewater, the hydrolysis acidification tank is connected with an anoxic tank to remove nitrogen from the wastewater, and the anoxic tank is connected with a second aerobic tank to further remove organic matter; the first aerobic tank, the hydrolysis acidification tank, the anoxic tank and the second aerobic tank are all existing devices.

[0058] It can be understood that a first pipeline is arranged between the gas outlet end of the ammonia recovery system and the ammoniation reactor, and a second pipeline is arranged between the gas outlet end of the ammonia recovery system and the sedimentation tank, and the ammonia recovery system provides waste heat to the ammoniation reactor and the sedimentation tank through the first pipeline and the second pipeline respectively.

[0059] In addition, the PH adjusting system is connected with the intermediate tank to adjust the PH value of the water in the intermediate tank, so as to control the PH of the water entering the evaporator, so that the total nitrogen in the steam generated by the evaporator exists in the form of ammonia nitrogen, and then the ammonia recovery system and the water treatment biochemical system are used to realize efficient recovery and removal of nitrogen.

[0060] The PH adjusting system adopts an existing PH adjusting system, and the PH adjusting system is also connected with the anaerobic reaction tank to adjust the PH of the anaerobic reaction tank, so that the anaerobic reaction tank is within a set value range.

[0061] In the embodiment, the biological farm has a pond, and also has a breeding area and a planting area. The breeding area can breed insects and also can breed poultry. The insects bred by the insect breeding can be provided to the breeding area, and the insect sand bred by the insect breeding can be used in the planting area. The pond can be used for fish farming, etc. The MBR effluent is directly pumped into the ecological farm pond by a pump.

[0062] The treatment equipment provided in the embodiment is provided with an anaerobic reaction tank, which can ferment to produce methane, and the methane energy can be recovered. The centrifugation water of the first centrifuge and the supernatant in the sedimentation tank can all enter the intermediate tank. The water produced by the intermediate tank enters the evaporator to be evaporated and concentrated. The gas produced by the evaporator enters the ammonia recovery system to prepare nitrogen fertilizer, so as to utilize the ammonia nitrogen elements in the kitchen waste water. The sludge discharged by the first centrifuge can enter the concentrated liquid thickening system. The sludge contains a large amount of organic matter. The sludge and the main raw materials produced by the evaporator for insect breeding are used, so that the substances in the kitchen waste water are basically utilized as resources. In addition, the waste heat of the ammonia recovery system is utilized. The energy of the evaporator comes from the methane produced by fermentation. The concentrated liquid is reasonably disposed, so that the problem of high disposal cost of the concentrated liquid is solved.

[0063] Embodiment two

[0064] The embodiment provides a method for efficient utilization of kitchen wastewater, and adopts the treatment equipment for efficient utilization of kitchen wastewater in the embodiment one, and includes the following contents.

[0065] The kitchen wastewater first enters the ammoniation reactor, and is subjected to high-speed circulation at a set flow rate under the condition of a set temperature, such as 30-40 DEG C, specifically 35 DEG C, so that the organic nitrogen in the kitchen wastewater is degraded, the organic nitrogen is dissolved and decomposed to convert into ammonia nitrogen, the amount of ammonia nitrogen is increased by about 4 times, the sedimentation efficiency is increased by about 2 times, the colloidal substances in the wastewater are reduced, and the ammonia nitrogen load in the wastewater is increased, and the ammonia nitrogen index in the wastewater is increased from 600 mg / L to 2000 mg / L.

[0066] The kitchen wastewater after the ammoniation reactor reaction is self-flowed into the gravity type sedimentation tank, and the design residence time in the gravity type sedimentation tank is 0.5-3 days, and in the embodiment, the residence time is 1 day. Through 1 day of natural sedimentation, the kitchen wastewater sedimentation ratio can reach 50%-70%, the kitchen wastewater can be subjected to solid-liquid separation, the slurry at the bottom is pumped into the anaerobic reaction tank by a slurry pump for anaerobic reaction, the organic load of the sediment is increased by about 2 times compared with that before the sedimentation, the methane production per unit volume of the anaerobic tank is greatly increased, and the gas production is increased by about 2 times, and the supernatant at the upper part is self-flowed into the intermediate pool, and the COD (chemical oxygen demand) of the supernatant is maintained within a set value range, such as about 60000 mg / L, and the ammonia nitrogen is maintained within a set value range, such as about 2000 mg / L.

[0067] The water out of the anaerobic reaction tank is subjected to solid-liquid separation through the centrifugal action of the first centrifugal machine, the COD of the water out of the anaerobic reaction tank is maintained at about 20000 mg / L, and the ammonia nitrogen is maintained at about 2000 mg / L; after the water out of the anaerobic reaction tank is centrifuged by the first centrifugal machine, the centrifugal water is pumped into the intermediate pool, the centrifugal water in the intermediate pool is mixed with the water out of the gravity type sedimentation tank, after mixing, the COD of the water in the intermediate pool is maintained at about 40000 mg / L, and the ammonia nitrogen is maintained at about 2000 mg / L; and the centrifugal sludge is pumped into the concentrated liquid thickening system by a slurry pump.

[0068] The first stirring mechanism is arranged in the intermediate pool, and the mixing of different water qualities is uniform; the water quality in the intermediate pool is controlled by the PH adjusting system, and the PH value of the water quality is always within the range of 7-9. The water out of the intermediate pool is pumped into the evaporator by a sewage pump, and is concentrated by evaporation in the evaporator, about 90% of the phosphorus resources and organic matter resources in the wastewater are concentrated into concentrated liquid, the nitrogen resources are in the form of ammonia gas and steam and escape into the ammonia recovery system, the ammonia gas reacts with carbon dioxide in the ammonia recovery system to produce ammonium bicarbonate products, and the ammonia recovery rate is about 99.9%.

[0069] The steam evaporated by the evaporator is recovered in the ammonia recovery system, and the COD index of the effluent is maintained at about 4000 mg / L, and the ammonia nitrogen index is maintained at about 2 mg / L; the effluent is pumped into the water treatment biochemical system by the sewage pump, in the water treatment biochemical system, the influent organic load of the water treatment biochemical system is greatly reduced through the action of microorganisms in the aerobic tank; the B / C (environmental monitoring index / chemical oxygen demand) ratio in the wastewater is further improved through the hydrolysis and acidification of the hydrolysis acidification tank, and the biodegradability is improved, so that the treatment efficiency of the subsequent AO (anaerobic and aerobic process) is improved; the organic matter and total nitrogen in the wastewater are further reduced through the action of microorganisms in the anoxic and aerobic tanks, and the effluent reaches the surface water V-class discharge standard through the filtration and interception of the MBR (membrane bioreactor).

[0070] The anaerobic reaction tank is periodically discharged by the sludge pump, the water treatment biochemical system is also periodically discharged by the sludge pump, and the sludge separated during centrifugation of the first centrifuge is also discharged by the sludge pump; the three kinds of biochemical sludge enter the sludge pool of the thickening system, the three kinds of sludge are mixed uniformly in the sludge pool, the uniformly mixed biochemical sludge in the sludge pool is separated by the existing horizontal screw centrifuge, the liquid is pumped into the intermediate pool by the sewage pump at a set flow rate, and the sludge is pumped into the conveying system by the screw pump and enters the drying machine. After drying, the moisture content of the sludge is reduced to below 60%, and then the sludge is conveyed to the mixer by the screw conveying mechanism, a spraying mechanism is arranged at the top of the mixer, and the thickening liquid is sprayed on the surface of the dried sludge at a set flow rate, bacteria and auxiliary materials are added, and after uniform mixing, the mixture is pumped into the buffer tank for storage as insect breeding auxiliary materials.

[0071] In addition, the ammonium bicarbonate nitrogen fertilizer produced by the ammonia recovery system is mixed with insects and insect sand produced by insect breeding by the mixer, and corresponding auxiliary materials can be added to produce efficient organic fertilizer for planting in ecological farms. Understandably, the MBR effluent reaches the surface water V-class standard, and is directly pumped into the ecological farm pond by the pump for pond water replenishment and updating and farm planting water.

[0072] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A treatment equipment for efficient utilization of kitchen wastewater, characterized by, The system comprises an ammoniation reactor, a settling tank, an intermediate tank and an evaporator connected in sequence, the settling tank is connected with an anaerobic reactor to produce methane by fermentation, the outlet of the anaerobic reactor is connected with a first centrifugal machine, the first centrifugal machine is connected with the intermediate tank and a thickening system respectively, the supernatant precipitated by the settling tank and the centrifugal outlet water of the first centrifugal machine enter the intermediate tank respectively, the outlet water of the intermediate tank enters the evaporator to be evaporated and concentrated, the evaporator is connected with an ammonia recovery system to produce nitrogen fertilizer by recovering ammonia gas, the thickening system comprises a spraying mechanism and a mixer, the spraying mechanism is arranged above the mixer, the evaporator is connected with the spraying mechanism to provide concentrated liquid to the spraying mechanism, the first centrifugal machine provides sludge to the thickening system, and the mixer mixes the concentrated liquid and dried sludge to produce raw materials for insect breeding. The anaerobic reactor is connected with a methane purification energy system, a first outlet end of the methane purification energy system is connected with the ammonia recovery system to provide carbon dioxide energy to the ammonia recovery system. A second outlet end of the methane purification energy system is connected with the evaporator to provide methane to the evaporator. A condensate outlet end of the ammonia recovery system is connected with a water treatment biochemical system to remove part of the organic matter, the water treatment biochemical system comprises a first aerobic tank to reduce the organic matter content of the water treatment biochemical system and convert residual ammonia nitrogen into nitrate nitrogen, the first aerobic tank is connected with a hydrolysis acidification tank to improve the biodegradability of the wastewater, the hydrolysis acidification tank is connected with an anoxic tank to remove nitrogen from the wastewater, and the anoxic tank is connected with a second aerobic tank to further remove organic matter.

2. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, The anaerobic reactor is connected with the thickening system to discharge sludge produced by the anaerobic reactor into the thickening system.

3. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, The ammonia recovery system comprises an ammonia recovery tower to recover ammonia gas in the steam produced by the evaporator, the ammonia gas reacts with carbon dioxide to produce ammonium bicarbonate, and the ammonium bicarbonate is the nitrogen fertilizer.

4. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, The water treatment biochemical system is connected with a membrane bioreactor, a solid outlet end of the membrane bioreactor is connected with the thickening system to provide sludge to the thickening system, and a liquid outlet end of the membrane bioreactor provides water source to an ecological farm.

5. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, A first pipeline is arranged between a gas outlet end of the ammonia recovery system and the ammoniation reactor, a second pipeline is arranged between the gas outlet end of the ammonia recovery system and the settling tank, and the ammonia recovery system provides waste heat to the ammoniation reactor and the settling tank through the first pipeline and the second pipeline respectively. The ammoniation reactor is connected with a kitchen waste water collection port through a circulating pump.

6. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, A first stirring mechanism is arranged in the intermediate tank. The thickening system comprises a sludge tank, a second stirring mechanism is arranged in the sludge tank, the sludge tank is connected with a second centrifugal machine, a liquid outlet end of the second centrifugal machine is connected with the intermediate tank, a solid outlet end of the second centrifugal machine is connected with a drying machine, the mixer is connected with the drying machine, and the mixer is connected with a buffer tank.

7. The kitchen wastewater high-efficiency utilization processing equipment according to claim 1, characterized in that, A pH adjusting system is further arranged, which is connected with the intermediate tank to adjust the pH value of the water in the intermediate tank. The pH adjusting system is further connected with the anaerobic reactor.

8. A method for efficient use of kitchen wastewater, characterized by, The kitchen wastewater efficient utilization treatment equipment according to any one of claims 1-7 comprises the following contents: The kitchen wastewater enters an ammoniation reactor to react, dissolves and converts organic nitrogen in the kitchen wastewater into ammonia nitrogen; The kitchen wastewater after the ammoniation reactor reaction enters a sedimentation tank to stay for a set time; The supernatant after the sedimentation enters an intermediate water pool, and the sediment is pumped into an anaerobic reaction tank to obtain mixed gas with methane through the anaerobic reaction tank; The water out of the anaerobic reaction tank is centrifuged by a first centrifugal machine, and the centrifuged water enters the intermediate water pool, and the centrifuged water is mixed with the water out of the sedimentation tank in the intermediate water pool; The water out of the intermediate water pool enters an evaporator, and the evaporation and concentration of the evaporator concentrate part of the phosphorus resources and organic matter resources in the wastewater to form concentrated liquid, and the nitrogen resources escape in the form of ammonia gas and steam into an ammonia recovery system; The ammonia recovery system recovers ammonia gas and produces nitrogen fertilizer; The first centrifugal machine provides sludge to a concentrated liquid thickening system, and the concentrated liquid thickening system provides raw materials for insect breeding auxiliary materials, the insect breeding auxiliary materials are used for insect breeding, the nitrogen fertilizer produced by the ammonia recovery system and insects and insect sand produced by the insect breeding enter an ecological farm.

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