CN216537810U

CN216537810U - Microbial deodorization device for removing ammonia gas and hydrogen sulfide

Info

Publication number: CN216537810U
Application number: CN202120693747.5U
Authority: CN
Inventors: 牛永艳; 毛婷; 王治业; 季彬; 杜津昊; 穆永松
Original assignee: Institute of Biology of Gansu Academy of Sciences
Current assignee: Institute of Biology of Gansu Academy of Sciences
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2022-05-17
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a microbial deodorization device for removing ammonia and hydrogen sulfide, which comprises a deodorization box, a gas inlet and outlet pipeline, a circulating water device, a detector and the like, wherein the deodorization box is fully contacted with air containing ammonia and hydrogen sulfide through deodorization bacteria liquid, the ammonia and the hydrogen sulfide in the air are firstly preliminarily removed, then the ammonia and the hydrogen sulfide are efficiently degraded by using microorganism strains for ammonia removal and desulfurization, and the degraded solution is continuously exchanged with the air containing the ammonia and the hydrogen sulfide and is degraded in a circulating way. The microbial deodorization device can realize the thorough degradation of ammonia gas and hydrogen sulfide in air, has no secondary pollution, is small in size and small in occupied area, is convenient to flexibly arrange and use indoors, and can reuse the immobilized microbial inoculum, so that the cost is low.

Description

Get rid of microorganism deodorizing device of ammonia and hydrogen sulfide

Technical Field

The utility model relates to the field of biological deodorization, in particular to a microbial deodorization device for removing ammonia gas and hydrogen sulfide.

Background

With the development of large-scale and industrialized agriculture in China, a large amount of waste is generated in livestock and poultry breeding, and serious environmental problems and social problems are brought. Odor is one of the challenges facing the centralized treatment of livestock and poultry manure. A large amount of livestock and poultry manure can be fermented in the stacking process to generate various malodorous substances, including NH released by degradation of organic matters (such as protein and the like)₃When the degradation of sulfur-containing organic substances is incomplete, the formed methyl mercaptan is temporarily accumulated by the thalli and then converted into H₂S and other substances having a malodorous smell are referred to as malodorous contaminants.

The malodorous pollution may cause discomfort in the body, such as psychological aversion to the smell, and may also cause nausea, headache, anorexia, dysosmia, insomnia, and emotional instability. They all cause toxicity to human body in different degrees to breath, digestion, cardiovascular, endocrine and nervous system, and some aromatic compounds even cause human body distortion and canceration. Increasingly, people are concerned about the deteriorating atmospheric environment and have established strict emission standards. Therefore, how to properly treat the offensive odor has become one of the focuses of research.

At present, the livestock and poultry manure is deodorized at home and abroad mainly by adopting physical, chemical and biological deodorization technologies, so that the object image and the structure of the malodorous gas are changed, and the deodorization effect is further achieved. The chemical method mainly utilizes strong oxidant potassium permanganate, hydrogen peroxide, etc. to oxidize partial odor components into less-odor and odorless substances. Physical methods include mechanical ventilation to reduce odor concentration, or absorption of odors by absorbents. The biological deodorization method utilizes the physiological metabolic activity of microorganisms to metabolize malodorous substances into water, carbon dioxide, sulfuric acid, nitric acid and nitrous acid, so that the odor is harmless and is converted into pollution-free substances. The prior art biological deodorization devices are: biological filter, biological trickling filter. The biological filter and the biological trickling filter both have larger occupied area; the microorganism biomass is increased too fast to block the filler airflow, so that the mass transfer effect is influenced, and the removal efficiency is reduced; the equipment has large volume, the waste gas needs to stay for a long enough time, and the treatment time is too long; the filling is more troublesome to update and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a microbial deodorization device for removing ammonia gas and hydrogen sulfide.

The utility model aims to provide a microbial deodorization device for removing ammonia gas and hydrogen sulfide, which comprises a deodorization box, a gas inlet and outlet pipeline, a circulating water device, a detector and the like, and has the following specific structures and connection modes:

the deodorization box is a closed box body, the lateral wall of the top end of the deodorization box is connected with the inlet of an air outlet pipeline, the lateral wall of the bottom of the deodorization box is connected with the outlet of an air inlet pipeline, detectors are respectively connected in parallel on the air outlet pipeline and the air inlet pipeline, the air inlet end of an air inlet pipe is connected with an air compressor, the solution is filled in the deodorization box, the liquid level of the solution is lower than the opening of the air outlet pipeline, immobilized bacteria agent is suspended in the solution, the bottom of the deodorization box is connected with a water tank in parallel through a water pipe, a water pump is arranged on the water pipe, and the inlet and the outlet of the water pipe are provided with stainless steel filter screens.

Preferably, a temperature controller is arranged at the bottom in the deodorization box.

Preferably, a pressure reducing valve and a gas flowmeter are arranged on the air inlet pipe.

When the microbial deodorization device for removing ammonia and hydrogen sulfide provided by the utility model is operated, air containing ammonia and hydrogen sulfide is extruded into the deodorization box by the air compressor through the air inlet, the air is fully contacted with a solution in the deodorization box, the ammonia and the hydrogen sulfide in the air are dissolved in the solution, the ammonia and the hydrogen sulfide are decomposed by the immobilized microbial inoculum suspended in the solution through metabolism, and the residual air escapes from the solution and is discharged through the air outlet pipeline. The solution in the deodorization tank realizes the circular flow between the deodorization tank and the water tank through the water pump, and the gas-liquid exchange rate is improved, so that the decomposition efficiency of the immobilized bacteria agent on ammonia gas and hydrogen sulfide is improved. The detector can monitor the concentration of ammonia gas and hydrogen sulfide in the gas inlet pipeline and the gas outlet pipeline in real time. The temperature controller can control the temperature of the solution in the deodorization box within 22-35 ℃, thereby ensuring the temperature of the degradation environment of the immobilized microbial inoculum and effectively saving energy.

The utility model provides a microbial deodorization device for removing ammonia and hydrogen sulfide, which is characterized in that a deodorization bacterial solution is fully contacted with air containing ammonia and hydrogen sulfide, the ammonia and the hydrogen sulfide in the air are preliminarily removed, and then the ammonia and the hydrogen sulfide are efficiently degraded by using a microbial strain for ammonia removal and desulfurization. The clean bacteria liquid which is degraded by the microorganisms and does not contain ammonia and sulfide is continuously exchanged with the air containing ammonia and hydrogen sulfide, and the process is repeated. Thereby, the stench air continuously carries out the contact exchange with deodorization fungus liquid in this device, and ammonia and sulphide in the circulation deodorization fungus liquid are continuously got rid of, and ammonia and hydrogen sulfide in the air are continuously got rid of.

The microbial deodorization device for removing ammonia and hydrogen sulfide provided by the utility model can realize the complete degradation of ammonia and hydrogen sulfide in air, has no secondary pollution, is small in volume and small in occupied area, is convenient to flexibly arrange and use indoors, can repeatedly use immobilized bacteria, and is low in cost.

Drawings

FIG. 1 is a schematic view showing the structure of a microbial deodorizing apparatus for removing ammonia gas and hydrogen sulfide described in example 1.

In fig. 1, 1 is a deodorization box, 2 is an air outlet pipe, 3 is an air inlet pipe, 4 is a detector, 5 is an air compressor, 6 is a solution, 7 is an immobilized microbial inoculum, 8 is a water tank, 9 is a water pipe, 10 is a water pump, 11 is a filter screen, 12 is a temperature controller, 13 is a pressure reducing valve, and 14 is a gas flowmeter.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. The following examples are presented to assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any manner.

The immobilized microbial agent used in the following examples is obtained by immobilizing and embedding a mixed bacterial liquid of pseudomonas proteus, brevibacterium frigidum, bacillus belgii, bacillus japonicus and lactobacillus rhamnosus. The strains are all stored in key laboratories for developing and utilizing microbial resources in Gansu province of biological research institute of science institute in Gansu province.

Example 1

As shown in fig. 1, the high-efficiency microbial deodorizing device capable of removing ammonia gas and hydrogen sulfide simultaneously comprises a deodorizing box 1, a gas inlet and outlet pipeline, a circulating water device, a detector 4 and the like, and has the following specific structures and connection modes:

deodorization case 1 is a closed box, the 2 imports of pipeline of giving vent to anger is connected to 1 top lateral wall of deodorization case, the export of inlet line 3 is connected to the bottom, it has detector 4 to go out to have parallelly connected respectively on pipeline 2 and the inlet line 3 of giving vent to anger, air compressor 5 is connected to the inlet end of inlet line 3, the inside dress solution 6 of deodorization case 1, 6 liquid levels of solution are less than the pipeline mouth of pipeline 2 of giving vent to anger, the suspension has immobilized microbial inoculum 7 in the solution 6, 1 bottom of deodorization case leads to pipe 9 water tank 8 that connects in parallel, set up water pump 10 on the water pipe 9, the exit of water pipe 9 all has stainless steel filter screen 11, the bottom sets up temperature controller 12 in the deodorization case 1, set up relief pressure valve 13 and gas flowmeter 14 on the pipeline 3 of giving vent to anger.

Example 2

The biological deodorization device described in example 1 was used to examine the effect of removing ammonia and hydrogen sulfide from the air. In the cow farm of Huarui agricultural science and technology Limited company in Gansu province, the breeding wastewater is separated by dry and wet methods, the liquid dung is retained in a liquid dung pool with the volume of 150 m³And the buried depth is 3 m. The utility model is installed in a room with two underground septic tanks, the room is 18m long, 14m wide and 4m high, is a brick-concrete structure, the window is an aluminum alloy double-layer glass window, the air tightness of the door seam is tighter, the roof is provided with a vent with the diameter of 1 m, and the detection results of the ammonia gas and the hydrogen sulfide concentration in the room before the experiment are shown in table 1. All doors and windows and any pipelines communicated with the outside are sealed 20 hours before the experiment is started.

The deodorizing experiment process lasts for 3 days, the temperature of the experiment site is 1-8 ℃ in daytime, and the room temperature is 3-9 ℃. The experiment is divided into a preheating stage, an odor collecting stage, a microbial degradation stage and a running stopping stage. And in the preheating stage, the deodorizing air compressor is started by accident and other devices are all started, the preheating time is mainly determined by the temperature of the deodorizing microbial inoculum in the deodorizing box, if the temperature is 20-33 ℃, the preheating time can be shortened to 10min, and if the temperature is lower, the preheating time is finished when the temperature of the deodorizing microbial inoculum reaches 20 ℃ or above. While maintaining a circulating water flow rate of 30 ml/min. And in the odor collection stage, starting an air compressor, monitoring ammonia gas and hydrogen sulfide in the operation process, wherein the monitoring time points are 0h, 0.5h, 1h, 1.5 h, 2 h, 2.5 h, 3h and 4h, the monitoring results are shown in a table 2, and the operation is continued until the concentrations of the ammonia gas and the hydrogen sulfide in the room are reduced to below 1 ppm. And in the microbial degradation stage, the air compressor is stopped, other devices normally run for 4 hours, ammonia gas and hydrogen sulfide are monitored, the monitoring time points are 6 hours and 8 hours, and the monitoring results are shown in table 2. And then stops running.

TABLE 1 results of monitoring the concentration of ammonia and hydrogen sulfide in room air

According to the data in the table, the concentrations of ammonia and hydrogen sulfide in the room are in high level for a long time, the living environment of local workers is seriously influenced, and the deodorization technology is urgently needed.

TABLE 2 results of monitoring the concentration of ammonia and hydrogen sulfide in the air of the room during the implementation

According to the data in the table, the biological deodorization device provided by the utility model can simultaneously remove the ammonia gas and the hydrogen sulfide in the room, the reduction rate of the ammonia gas and the hydrogen sulfide concentration in 3h reaches 95%, and the ammonia gas and the hydrogen sulfide concentration are kept unchanged in 4h after the air compressor is stopped. Furthermore, due to the strong degradation effect of the deodorizing bactericide, the content of ammonia and sulfur-containing substances in the solution for absorbing ammonia and hydrogen sulfide is kept at an extremely low concentration level, and the phenomenon that the absorbed ammonia and hydrogen sulfide escape again in the next operation is avoided.

Claims

1. A microorganism deodorization device for removing ammonia gas and hydrogen sulfide is characterized in that the structure and the connection mode of the deodorization device are as follows: deodorization case (1) is a closed box, deodorization case (1) top lateral wall inserts outlet pipe way (2), inlet pipe way (3) are inserted to the bottom lateral wall, it has detector (4) to go up respectively in parallel connection on outlet pipe way (2) and inlet pipe way (3), air compressor (5) are connected to the inlet end of inlet pipe way (3), deodorization case (1) inside dress solution (6), solution (6) liquid level is less than the pipeline mouth of outlet pipe way (2), it has immobilized microbial inoculum (7) to suspend in solution (6), water pipe (9) water tank (8) that connect in parallel are passed through to deodorization case (1) bottom, set up water pump (10) on water pipe (9), the exit of water pipe (9) all has filter screen (11).

2. The microbial deodorization device for removing ammonia gas and hydrogen sulfide as recited in claim 1, wherein a temperature controller (12) is disposed at the bottom of the deodorization tank (1).

3. A microbial deodorization device as claimed in claim 1, wherein said inlet duct (3) is provided with a pressure reducing valve (13) and a gas flow meter (14).