CN111298623A - Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens - Google Patents

Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens Download PDF

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Publication number
CN111298623A
CN111298623A CN202010292978.5A CN202010292978A CN111298623A CN 111298623 A CN111298623 A CN 111298623A CN 202010292978 A CN202010292978 A CN 202010292978A CN 111298623 A CN111298623 A CN 111298623A
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kitchen waste
gas
valve
treatment
water
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张冬梅
杨春平
练松标
梁维波
张家盛
吴晓冰
吴岚
黄雅芸
黄燕玲
滕青
马寅
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Guangdong University of Petrochemical Technology
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Guangdong University of Petrochemical Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456Removing acid components
    • B01D53/1468Removing hydrogen sulfide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/44Organic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/52Hydrogen sulfide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/58Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84Biological processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • B01D2251/106Peroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/95Specific microorganisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/22Carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0266Other waste gases from animal farms
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a three-waste co-treatment combined device in a process of treating kitchen waste by hermetia illucens, which comprises a closed cultivation factory, an aerobic reactor, a Fenton oxidation pond, a kitchen waste storage chamber, an anaerobic reactor, a secondary sedimentation pond and an ozone disinfection pond, wherein a screen is arranged at the middle lower part of the kitchen waste storage chamber, a kitchen waste storage chamber is arranged above the screen, and a swill pool is arranged below the screen. The invention can improve the degradation rate of odor in the culture process and greatly reduce the treatment cost.

Description

Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens
Technical Field
The invention belongs to the field of environment-friendly resource regeneration, and discloses a combined treatment device for co-processing three wastes generated in the process of feeding hermetia illucens with kitchen waste, which realizes the odor degradation rate of 100% in the culture process and achieves the technical aims of no waste discharge and waste water recycling.
Background
The population of China accounts for 21.0 percent of the total population of the world, and the domestic garbage yield of China is at the head of the world. In Guangzhou, for example, 2800 tons of kitchen waste are generated per day, which amounts to 90 ten thousand tons per year. After the 'notice of the house and urban and rural construction department and other departments of China about the comprehensive development of the domestic garbage classification work in the nationwide grade and above cities' is released in 2221 year and 6 months, the domestic garbage recycling rate is required to reach more than 37 percent. The proportion of kitchen garbage in urban domestic garbage exceeds 2/3, and the kitchen garbage is being treated by breeding hermetia illucens at present to become a hot point technology in the field of environmental protection, but odor generated in the breeding process of hermetia illucens is greatly enriched in the breeding area of the hermetia illucens and is diffused to the surrounding space along the concentration gradient. The odor component is mainly inorganic molecule NH3、H2S, organic molecule CH3SH 、CH3NH2Indole, and the like. The odor generated in the breeding industry seriously affects the quality of surrounding living environment, and the trend of environmental protection in China and the international societyThe promise of carbon emission reduction and the observation of economic development strategy, and the odor treatment of the aquaculture industry is a key field of future atmospheric treatment. At present, no targeted treatment technology is provided for the odor generated in the black soldier fly breeding process. Therefore, the treatment of the odor becomes a bottleneck problem of recycling kitchen waste resources in the future.
The current treatment technology for odor mainly comprises the following steps: physical adsorption, chemical oxidation, incineration, traditional biological methods, plant liquid spraying, plasma decomposition, photocatalytic oxidation, and the like, which have been newly developed in recent years. The incineration method, the plasma decomposition method and the photocatalytic oxidation method have high treatment efficiency, but have large equipment investment, high operation cost and complex maintenance, and finally, a chimney with the length of 15m for high-altitude discharge of the treated gas is still required. In contrast, the biological treatment method, which has the lowest investment and operation cost, is gradually paid attention and becomes one of the main methods for treating malodorous gases, but the method is limited in practical application because the water-gas contact time is difficult to control, and particularly, some macromolecular odor components which are not easy to dissolve in water are difficult to directly remove. Therefore, it is necessary to develop new processes to overcome the above technical defects.
The process of breeding the hermetia illucens by utilizing the kitchen waste has the following main sources of odor: the organic matter is decayed in the garbage placing or fermenting process to generate odor; the black soldier fly produces odor in the metabolic process; and the kitchen waste swill and the domestic sewage generate odor during treatment, wherein the feeding process, namely the odor in the cultivation factory occupies the largest proportion, and is the key of odor treatment. Therefore, the invention firstly limits the odor to the minimum range by adding the transparent sealing cover to the culture bed, plants the climbing vine plants or the turf in the sealing cover to play the roles of absorbing and purifying a small amount of residual odor and improving the culture environment, and compared with the traditional greenhouse type culture room, the odor degree of the method is reduced by more than 95%. Secondly, according to the properties of the odor, the invention firstly adsorbs the micromolecule such as ammonia gas, hydrogen sulfide gas and the like in the odor which are easily soluble in water and gas components which are slightly soluble in water by using a wastewater treatment facility, and the biochemical treatment is carried out through the nitrification and assimilation of microorganisms, so that the dosage of the medicament during the subsequent Fenton oxidation of other odor substances is greatly reduced, and the degradation is more thorough. In addition, a venturi tube is designed in the Fenton oxidation pond to improve a gas-water mixing mode, so that the technical goals of 100% degradation rate of odor substances and zero emission of waste gas are achieved, and the odor treatment cost is reduced by over 30%.
Disclosure of Invention
The invention aims to provide a three-waste co-treatment combined device in the process of treating kitchen waste by hermetia illucens, which can improve the odor degradation rate in the culture process and greatly reduce the treatment cost.
The invention provides a three-waste co-treatment combined device in the process of treating kitchen waste by hermetia illucens, which comprises a closed cultivation factory, an aerobic reactor, a fenton oxidation pond, a kitchen waste storage chamber, an anaerobic reactor, a secondary sedimentation pond and an ozone disinfection pond, wherein a screen is arranged at the middle lower part of the kitchen waste storage chamber, a kitchen waste storage chamber is arranged above the screen, and a swill pond is arranged below the screen, wherein a gas pipeline of the closed cultivation factory is connected with the aerobic reactor, a centrifugal fan is arranged on the gas pipeline, a gas outlet at the top of the aerobic reactor is connected with a gas inlet of the closed fenton oxidation pond through a second valve and a fan, one path of a reaction liquid outlet at the bottom of the fenton oxidation pond is connected with a venturi water inlet pipe in the fenton oxidation pond through a circulating pump and a third valve, the other path of the reaction liquid outlet is connected with the swill pond in the kitchen waste storage chamber through the circulating pump and a fourth valve, and a gas outlet, The fan is connected with the gas inlet of the Fenton oxidation tank, one path of the water outlet of the aerobic reactor is connected with the secondary sedimentation tank through the ninth valve and the fourth water pump, the water outlet of the secondary sedimentation tank is connected with the water inlet of the ozone disinfection tank, the other path of the water outlet of the aerobic reactor is connected with the water inlet of the anaerobic reactor through the first valve, the first water pump, the sixth valve and the second water pump, the water outlet of the swill tank is connected with the water inlet of the anaerobic reactor through the sixth valve and the second water pump, the water outlet of the anaerobic reactor is connected with the water inlet of the aerobic reactor through the eighth valve and the third water pump, and the gas outlet at the top of the anaerobic reactor is connected with the gas inlet of the.
In the aforesaid, the breed area of closed breed factory building is provided with a plurality of beds of breeding, and every is bred the bed and is provided with the gas collection cover, and every gas collection cover top has the bucket type inlet scoop that leaks down, and all leak down bucket type inlet scoops pass through the air duct and are connected with gas transmission pipeline.
In the above, the gas collecting cover is made of a light-transmitting material.
In the aerobic reactor, the bottom of the aerobic reactor is provided with a gas distribution pipe, the middle part of the aerobic reactor is provided with a packing layer, and the gas distribution pipe is communicated with a gas transmission pipeline.
In the above, the top of the Fenton oxidation tank is provided with a hydrogen peroxide dosing pipe, an iron salt dosing pipe and an acid dosing pipe, and the interior of the Fenton oxidation tank is provided with a first pH detector.
In the above, set up between swill pond outlet and sixth valve and add alkali pipe, set up the second pH detector before the pump of second water pump.
In the above, the inside of the ozone disinfection tank is provided with the ultraviolet sterilization lamp, the bottom of the ozone disinfection tank is provided with the ozone distribution pipe, and the ozone distribution pipe is connected with the ozone generator.
The invention has the following beneficial effects:
1. in the existing odor treatment technology, the Fenton oxidation method has the characteristics of thorough degradation of odor substances, low treatment cost, easiness in control of operation and the like, but the existing method of mixing air and water by using an air spray type reverse flow air suction mode causes short retention time of waste gas of a reactor, is difficult to eliminate invalid contact phenomenon, causes technical bottleneck in improvement of waste gas degradation rate, and finally still discharges part of waste gas. The design of the venturi tube gas-water mixing mode greatly improves the dissolving rate and the reaction rate of the odor substances, improves the volume load of the treatment of the odor substances, reduces the volume of the reactor by more than 2 times, and greatly reduces the occupied area and the equipment cost; and through the closed design of the reactor, on one hand, the negative pressure is more favorably formed, the contact power of gas molecules and Fenton reaction liquid is increased, and the degradation rate of odor substances reaches 100 percent; on the other hand, the odor in each structure is automatically brought into the pool under the action of negative pressure, and a low-power fan is not needed or only needed to transmit gas, so that the power consumption is greatly reduced, and no waste gas is discharged thoroughly.
2. According to the characteristic that the ratio of ammonia gas to ammonia gas in odor generated in the culture process is high, the characteristic that the ammonia gas is easy to dissolve in water is utilized, the micromolecules such as the ammonia gas, the hydrogen sulfide gas and the like are easy to dissolve in water and gas components which are slightly soluble in water are adsorbed out through an aerobic biomembrane reactor, the water-gas contact time is prolonged through the biomembrane, the ammonia removal rate is over 99 percent, and the micromolecule water-soluble gas components such as the ammonia gas, the hydrogen sulfide gas and the like are treated through the nitrification and assimilation of microorganisms, so that the treatment cost of the odor substances is reduced to the maximum extent, the medicament dosage of a subsequent Fenton oxidation tank can be greatly reduced, and other odor.
3. According to the invention, the 'three wastes' generated in the process of breeding the black soldier flies by the kitchen waste are subjected to system design, the Fenton solution is discharged into a swill pool of a kitchen waste storage chamber, the pH value of the Fenton solution after reaction is regulated by the swill and then flows back into a wastewater biochemical treatment pool, and the alkali consumption can be greatly reduced by more than 60%. With CO as an end product of molecular degradation of organic odors2Mainly, the inorganic carbon source required by denitrification is greatly supplemented after the inorganic carbon source is refluxed to the anaerobic reactor. In addition, after each waste water and odor treatment facility is covered and sealed, the waste water and the odor are discharged into the Fenton oxidation pond through the gas transmission pipeline, and the top of the oxidation pond generates negative pressure to mix gas and water, so that the odor is more favorably discharged and subjected to oxidation reaction, and the technical aim of no exhaust gas discharge is achieved. Compared with the prior art, the total cost of odor treatment is reduced by more than 30 percent.
Drawings
FIG. 1 is a process flow diagram of the present invention.
In the figure, 1-an anaerobic reactor, 2-an aerobic reactor, 3-a secondary sedimentation tank, 4-an ozone disinfection tank, 5-a closed cultivation factory, 6-a kitchen waste storage chamber, 7-a Fenton oxidation tank, 8-an air guide pipe, 9-a centrifugal fan, 10-an air transmission pipeline, 11-a first water pump, 12-a first valve, 13-an air distribution pipe, 14-a packing layer, 15-a second valve, 16-a fan, 17-an acid adding pipe, 18-a first pH detector, 19-a hydrogen peroxide dosing pipe, 20-an iron salt dosing pipe, 21-a venturi water inlet pipe, 22-a third valve, 23-a circulating pump, 24-a fourth valve, 25-a fifth valve, 26-a kitchen waste storage chamber and 27-a screen, 28-swill pool, 29-alkali adding pipe, 30-sixth valve, 31-second water pump, 32-second pH detector, 33-seventh valve, 34-eighth valve, 35-third water pump, 36-ninth valve, 37-fourth water pump, 38-ultraviolet sterilizing lamp, 39-ozone distributing pipe, 40-ozone generator, 41-tenth valve, 42-fifth water pump and 43-gas collecting cover.
Detailed Description
Referring to fig. 1, the invention provides a combined equipment for co-processing three wastes in the process of treating kitchen waste by hermetia illucens, which comprises a closed cultivation factory 5, an aerobic reactor 2, a fenton oxidation pond 7, a kitchen waste storage chamber 6, an anaerobic reactor 1, a secondary sedimentation tank 3 and an ozone disinfection tank 4, wherein a screen 27 is arranged at the middle lower part of the kitchen waste storage chamber 6, a kitchen waste storage chamber 26 is arranged above the screen 27, and a swill pool 28 is arranged below the screen 27, wherein a cultivation area of the closed cultivation factory 5 is provided with a plurality of cultivation beds, each cultivation bed is provided with a gas collection cover 43, the gas collection cover 43 is made of a light-transmitting material, the top of each gas collection cover 43 is provided with a reverse-leakage bucket type air suction inlet, all the reverse-leakage bucket type air suction inlets are connected with a gas pipeline 10 through a gas guide pipe 8, the gas pipeline 10 is provided with a centrifugal fan 9, the gas pipeline 10 is connected with, the middle part is provided with a packing layer 14, and the gas distribution pipe 13 is communicated with the gas transmission pipeline 10. The top gas outlet of the aerobic reactor 2 is connected with the gas inlet of the closed Fenton oxidation tank 7 through a second valve 15 and a fan 16, the top of the Fenton oxidation tank 7 is provided with a hydrogen peroxide dosing pipe 19, an iron salt dosing pipe 20 and an acid dosing pipe 17, and the interior of the Fenton oxidation tank is provided with a first pH detector 18. One path of a reaction liquid outlet at the bottom of the Fenton oxidation pond 7 is connected with a Venturi water inlet pipe 21 in the Fenton oxidation pond 7 through a circulating pump 23 and a third valve 22, the other path of the reaction liquid outlet is connected with a swill pond 28 in a kitchen waste storage chamber 6 through the circulating pump 23 and a fourth valve 24, a gas outlet at the top of a kitchen waste storage chamber 26 in the kitchen waste storage chamber 6 is connected with a gas inlet of the Fenton oxidation pond 7 through a fifth valve 25 and a fan 16, one path of a water outlet of the aerobic reactor 2 is connected with a secondary sedimentation tank 3 through a ninth valve 36 and a fourth water pump 37, a water outlet of the secondary sedimentation tank 3 is connected with a water inlet of an ozone disinfection tank 4, an ultraviolet sterilization lamp 38 is arranged in the ozone disinfection tank 4, an ozone distributing pipe 39 is arranged at the bottom, the ozone distributing pipe 39 is connected with an ozone generator 40, and a water outlet of the ozone generator 40 is connected with a water inlet. The other path of the water inlet of the aerobic reactor 2 is connected with the water outlet of the anaerobic reactor 1 through an eighth valve 34 and a third water pump 35, the other path of the water outlet of the aerobic reactor 2 is connected with the water inlet of the anaerobic reactor 1 through a first valve 12, a first water pump 11, a sixth valve 30 and a second water pump 31, the water outlet of the swill pool 28 is connected with the water inlet of the anaerobic reactor 1 through the sixth valve 30 and the second water pump 31, an alkali adding pipe 29 is arranged between the outlet of the swill pool and the sixth valve 30, and a second pH detector 32 is arranged in front of the pump of the second water pump 31. The water outlet of the anaerobic reactor 1 is connected with the water inlet of the aerobic reactor 2 through an eighth valve 34 and a third water pump 35, and the gas outlet at the top of the anaerobic reactor 1 is connected with the gas inlet of the Fenton oxidation tank 7 through a seventh valve 33 and a fan 16.
Application example:
100 tons of kitchen waste are treated in a certain market of Guangdong province as an implementation object, the black soldier fly cultivation factory 5 is a closed cultivation room 5, a cultivation area is provided with 3 layers of three-dimensional cultivation beds, the length is 3 meters and the width is 1.5 meters, odor generated is collected through a box-type gas collection cover 43, the top of the cover is provided with inverted funnel-type air suction openings, all the inverted funnel-type air suction openings are connected with a gas pipeline 10 through gas guide pipes 8, and the amount of the conveyed odor is about 126 ten thousand meters3/d。
The calculation of the amount of the odor of the sewage plant can determine the amount of the odor according to the area of water, the integral capping of the structure can determine the amount of the odor according to the volume of space, the partial capping of the pool surface can determine the amount of the odor according to the opening area and the wind speed, and the amount of the odor can also be determined according to the number of devices.
The commonly used odor quantity calculation method is that the air exchange quantity is calculated according to the ventilation quantity, the air exchange quantity is 2-3 times/h in places where people do not enter or generally do not enter, the air exchange quantity is 2-3.5 times/h in the space where people enter but the working time is not long, and the odor quantity is equal to the sum of the product of the volume of the space above the water surface of each structure and the ventilation quantity.
According to the odor generation rule and characteristics, the centrifugal fan 9 is started to start the ventilation system for ventilation 1 hour after feeding every time, and the centrifugal fan 9 is closed after continuously sucking for 2 hours. After stopping working for 1 hour, starting again, and entering an intermittent working mode, namely starting to ventilate once every 10 minutes for 3 hours after starting every 40 minutes.
The box-type gas collection cover 43 is made of light-transmitting materials such as organic glass, fixing frames are arranged at intervals of 40-50 cm along the long side direction of the culture bed, and are used for climbing vine plants such as brocade vines to attach.
The model of a centrifugal fan 9 connected with the gas transmission pipeline 10 is 10D, the power is 39kw, and the exhaust volume is 21000m3Setting 2 sets of each fan with working frequency of 5 times/h and working time of 6 min/time, sending odor into an aerobic reactor 2 with air inflow of 5000m3The bottom of the aerobic reactor 2 is provided with an air distribution pipe 13 and covers a pebble layer, the height of the pebbles is about 1/10 of the well depth, the middle part of the well is provided with a packing layer 14, the height of the packing layer 14 is about 1/5 of the well depth, the packing layer can be formed by packing materials such as plastic wave plates or polystyrene fiber balls, the retention time of odor is more than 5-15s, the ammonia in the odor can be fully dissolved in water, and the ammonia removal rate is more than 99%. After ammonia removal, odor is discharged from the top air duct 8, the pressure drop of air flow is 1.0-1.7 cm of water column, and the odor enters the closed Fenton oxidation pond 7.
The top of the sealed Fenton oxidation pond 7 is provided with an acid adding pipe 17, a first pH detector 18, a hydrogen peroxide dosing pipe 19, an iron salt dosing pipe 20 and a Venturi water inlet pipe 21. A hydrogen peroxide solution with the content of 21 percent is added into a hydrogen peroxide dosing tube 19, and a ferric salt dosing tube 20 is saturated FeSO4Adding sulfuric acid or hydrochloric acid solution into the solution via an acid adding pipe 17, and adjusting pH value to 4.0-5.0 via a first pH detector 18. Reaction liquid in the Fenton oxidation pond 7 enters the Venturi water inlet pipe 21 through the bottom water outlet pipe, the circulating pump 23 and the third valve 22, returns to the Fenton oxidation pond 7 again for cyclic utilization, and the negative pressure is formed in the Fenton oxidation pond 7 through the mode, so that odor and the Fenton reaction liquid in each gas transmission pipeline are fully mixed and are completely oxidized and degraded, and no waste gas is discharged.
The Fenton oxidation pond 7 is configured with 2, alternately operates, stops air inlet at certain time intervals, discharges the air into the swill pool 28 of the kitchen waste storage chamber 6 through the circulating pump 23 and the fourth valve 24, and stays for more than 1h to eliminate the influence of possibly residual hydrogen peroxide on the activated sludge in the anaerobic reactor 1.
The effluent of the swill pool 28 at the lower part of the kitchen waste storage chamber 6 enters the anaerobic reactor 1 through the sixth valve 30 and the second water pump 31 for treatment. The gas outlet at the top of the kitchen waste storage chamber 26 in the kitchen waste storage chamber 6 enters the Fenton oxidation pond 7 through the fifth valve 25 and the fan 16 to completely oxidize and decompose the odor.
Effluent of the aerobic reactor 2 enters the secondary sedimentation tank 3 through the ninth valve 36 and the fourth water pump 37, the top of the secondary sedimentation tank is closed, a small amount of odorous gas at the top of the secondary sedimentation tank enters the Fenton oxidation tank 7 through the second valve 15 and the fan 16, and the air and water are mixed by utilizing the principle that the top of the secondary sedimentation tank generates negative pressure, so that the time of oxidative degradation of the odor in the reaction tank is not limited, and the mode ensures that the odor generated in the black soldier fly breeding process reaches zero emission.
The present invention is not limited to the above embodiments, and the embodiments and the description are only for the main features and advantages of the present invention, and other forms of products can be obtained by anyone with the teaching of the present invention, but any changes in the shape or structure can be made within the protection scope of the present invention, which is the same or similar to the present invention.

Claims (7)

1. The three-waste co-treatment combined equipment in the process of treating kitchen waste by using hermetia illucens is characterized by comprising a closed cultivation factory building, an aerobic reactor, a fenton oxidation pond, a kitchen waste storage chamber, an anaerobic reactor, a secondary sedimentation pond and an ozone disinfection pond, wherein a screen mesh is arranged at the middle lower part of the kitchen waste storage chamber, a kitchen waste storage chamber is arranged above the screen mesh, and a swill pond is arranged below the screen mesh, wherein a gas pipeline of the closed cultivation factory building is connected with the aerobic reactor, a centrifugal fan is arranged on the gas pipeline, a gas outlet at the top of the aerobic reactor is connected with a gas inlet of the closed fenton oxidation pond through a second valve and the fan, one path of a reaction liquid outlet at the bottom of the fenton oxidation pond is connected with a venturi water inlet pipe in the fenton oxidation pond through a circulating pump and a valve, the other path of the reaction liquid outlet is connected with the swill pond in the kitchen waste storage chamber through the circulating pump and a fourth valve, The fan is connected with the gas inlet of the Fenton oxidation tank, one path of the water outlet of the aerobic reactor is connected with the secondary sedimentation tank through the ninth valve and the fourth water pump, the water outlet of the secondary sedimentation tank is connected with the water inlet of the ozone disinfection tank, the other path of the water outlet of the aerobic reactor is connected with the water inlet of the anaerobic reactor through the first valve, the first water pump, the sixth valve and the second water pump, the water outlet of the swill tank is connected with the water inlet of the anaerobic reactor through the sixth valve and the second water pump, the water outlet of the anaerobic reactor is connected with the water inlet of the aerobic reactor through the eighth valve and the third water pump, and the gas outlet at the top of the anaerobic reactor is connected with the gas inlet of the.
2. The heisui river horsefly kitchen waste treatment process three wastes combined treatment combined equipment as claimed in claim 1, wherein a plurality of culture beds are arranged in a culture area of the closed culture plant, each culture bed is provided with a gas collection cover, a reversed-leakage bucket type air suction opening is arranged at the top of each gas collection cover, and all the reversed-leakage bucket type air suction openings are connected with a gas pipeline through gas guide pipes.
3. The heisui river fly kitchen waste treatment process three wastes combined treatment equipment as claimed in claim 2, characterized in that the gas collection cover is made of light-transmitting material.
4. The heisui river horsefly kitchen waste treatment process three-waste co-treatment combined equipment as claimed in claim 1, is characterized in that an air distribution pipe is arranged at the bottom of the aerobic reactor, a packing layer is arranged in the middle of the aerobic reactor, and the air distribution pipe is communicated with an air conveying pipeline.
5. The heisui river horsefly kitchen waste treatment process three-waste co-treatment combination equipment as claimed in claim 1, is characterized in that a hydrogen peroxide dosing pipe, an iron salt dosing pipe and an acid dosing pipe are arranged at the top of the Fenton oxidation pond, and a first pH detector is arranged inside the Fenton oxidation pond.
6. The combined device for co-processing the three wastes in the process of treating the kitchen waste by the black soldier flies according to claim 1, wherein an alkali adding pipe is arranged between the outlet of the swill pool and the sixth valve, and a second pH detector is arranged in front of a pump of the second water pump.
7. The combined equipment for the three-waste co-treatment in the process of treating the kitchen waste by the hermetia illucens according to claim 1, wherein an ultraviolet sterilizing lamp is arranged in the ozone disinfection pool, an ozone distributing pipe is arranged at the bottom of the ozone disinfection pool, and the ozone distributing pipe is connected with an ozone generator.
CN202010292978.5A 2020-04-15 2020-04-15 Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens Pending CN111298623A (en)

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CN202010292978.5A CN111298623A (en) 2020-04-15 2020-04-15 Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens

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CN202010292978.5A CN111298623A (en) 2020-04-15 2020-04-15 Combined equipment for three-waste co-treatment in process of treating kitchen waste by hermetia illucens

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112913788A (en) * 2021-03-05 2021-06-08 四川蜀凤梧环保科技有限公司 All-weather constant-temperature and constant-humidity hermetia illucens breeding bin and breeding method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112913788A (en) * 2021-03-05 2021-06-08 四川蜀凤梧环保科技有限公司 All-weather constant-temperature and constant-humidity hermetia illucens breeding bin and breeding method
CN112913788B (en) * 2021-03-05 2022-06-10 四川蜀凤梧环保科技有限公司 All-weather constant-temperature and constant-humidity hermetia illucens breeding bin and breeding method

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