CN1217952A - Method for purifying gases containing stench sulphureous gases - Google Patents
Method for purifying gases containing stench sulphureous gases Download PDFInfo
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Abstract
A process for clarifying stink gas containing sulfur features that the waste stink gas passes through a filler tower fulling of sulfur-decomposing bacillus filler and the humidity of the filler is kept at 20-80 w% to ensure full contact between waste gas and the bacillus for degradating sulfide. As the filler layer is in non-liquid phase, it has high clarifying efficiency and lower pressure drop. Besides spraying nutritive liquid, any chemical is not needed, resulting in low consumption of raw materials and no secondary pollution.
Description
The invention relates to a biological purification method of sulfur-containing malodorous waste gas.
In the process of refining petroleum and processing petrochemical products, particularly in the process of refining sulfur-containing crude oil and processing related products, petrochemical enterprises often generate malodorous gases containing sulfides, which pollute the atmospheric environment and harm the public health. For some petrochemical plants, such as caustic sludge treatment, secondary combination, hydrocracking, two sets of atmospheric and vacuum devices and the like, the emitted high-concentration sulfide malodorous gas is generally introduced into a Claus combustion device for treatment and is absorbed by chemical agents for recovering sulfur; for some low-concentration sulfide malodorous gases, chemical absorption or absorption oxidation methods are generally adopted.
Among the above methods, the Claus combustion method is not suitable for the treatment of low-concentration sulfide malodorous gases, and the methods of chemical agent absorption or absorption oxidation, etc. need to use a large amount of chemical agents, and have the prominent disadvantages of complex equipment, high investment and operation cost, and easy generation of secondary pollution.
The sewage treatment facilities of enterprises for refining sulfur-containing crude oil and processing related products often discharge low-concentration sulfur compounds with foul odor, and are difficult to treat by the method.
It is known that sewage containing harmful substances can be biochemically treated using activated sludge. However, the use of activated sludge for the removal of harmful substances from petrochemical waste gases, particularly sulfur-containing harmful malodorous waste gases, has not been precedent.
Patent CN1039190 is directed to the waste gas (CS) from factories producing staple fibers, cellophane, fibrous casings or monofilament yarns2、H2S content respectively reaching 3000ppm and 1000ppm), providing a method for converting sulfur-containing harmful substances in waste gas by using a reactor filled with a filler containing solid-phase Thiobacillus microorganisms, continuously flowing a circulating liquid containing salt (mainly sulfate) through the filler reactor under the action of a pump to keep the filler wet all the time, reversely flowing the waste gas to the liquid wetting the filler, oxidizing the Thiobacillus microorganisms in the filler to convert the harmful substances into acidic compounds, and performing Ca (OH) reaction on the acidic compounds2After neutralization treatment and discharge of the generated Ca salt, the obtained alkali-containing solution is introduced into the packing reactor for recycling.
Patent CN1039190 proposes a method for purifying harmful gases containing sulfur by using microbial packing, but since the circulating liquid continuously flows through the packing layer and is opposite to the flow direction of the waste gas, the packing layer is actually in a liquid phase system due to too high wetting degree in the process of purifying the waste gas, which is substantially equivalent to the method for purifying waste gas by using wastewater aeration, there are the following disadvantages:
the purification reaction is carried out in a system similar to a liquid phase, the wetting degree of the filler is too high, so that the resistance of the waste gas flowing through the reactor is very high, a waste gas supercharging device is required to be arranged in front of the reactor, and the further improvement of the flow rate of the treated waste gas is influenced; the distribution of the waste gas in the reactor is uneven, so that the mass transfer efficiency between sulfur-containing harmful substances and oxygen in the waste gas and the thiobacillus in the filler is reduced, and the purification efficiency of the waste gas is reduced; the circulating liquid continuously flows through the reactor through the operation of the pump and needs to be supplemented frequently; the reaction product needs to be neutralized by alkaline solution. These disadvantages increase the power consumption and operating costs of the plant and also reduce the purification rate. For the sulfur-containing waste gas with high concentration, because a certain amount of gypsum can be generated, the defects can be partially compensated from the economical aspect; for sulfur-containing waste gas with low concentration, the application is limited due to high operation cost and large power consumption.
The invention aims to provide a method for purifying sulfur-containing harmful malodorous waste gas by utilizing thiobacillus, in particular to a method for purifying sulfur-containing harmful malodorous waste gas generated in petrochemical industry, which reduces the pressure drop in the process, improves the purification rate, simplifies the treatment process, and reduces the energy consumption and material consumption, thereby reducing the treatment cost.
The invention provides a method for removing low-concentration sulfur-containing harmful malodorous waste gas, which uses activated sludge generated in the sewage purification process for purifying the waste gas and can remove sulfide malodorous substances, mainly H, generated in the petroleum refining and petrochemical product processing processes2S, VOSC (thiols, thioethers). Because the mode of regularly spraying is adopted in the purification reaction process, the packing layer is controlled to keep 20-80% of humidity, and the defects are avoided.
The invention is characterized in that the harmful sulfur-containing foul waste gas is mainly in concentrationH below 80. mu.g/g2S and VOSC (mercaptan, thioether) with the concentration of less than 15 mu g/g pass through a biological filler tower, the biological filler consists of a biological carrier containing an immobilized microbial film taken from activated sludge, the purification reaction process is completed in the contact with the microbial film between gas and solid, liquid containing nutrient elements is regularly sprayed into the biological filler tower, the filler layer is controlled to keep 20-80% of humidity, preferably 25-70%, the microbial film is properly proliferated, metabolites of the microorganisms are converted into neutral harmless substances to be discharged, the purification reaction of harmful sulfur-containing malodorous substances is continuously carried out, and the reaction products can be sent into a sewage treatment facility for treatment.
The invention is mainly characterized in that an immobilized microbial film is taken from activated sludge in a running sewage treatment facility, the purification reaction of harmful sulfur-containing malodorous substances is mainly completed by a desulfurization microbial community mainly comprising thiobacillus, and the microbial film can be obtained by enrichment and domestication of 3-20 days after the activated sludge is fixed on a biological carrier, wherein the desulfurization microbial community for removing sulfide malodorous substances mainly comprises thiobacillus microorganisms. The carrier for fixing the activated sludge can be porous granular or fibrous bodies such as activated carbon, ceramic particles, peat, asbestos, plastics, fruit shells and the like, the activated sludge is hung on the surface of the carrier, a microbial film is formed, and the porous carrier can keep 20-80% of humidity of the biological filler due to good water absorption. The reactor adopts a biological packed tower reactor with a built-in spraying device. In the process of removing the sulfide malodorous gas by the microorganisms, nutrient solution is regularly sprayed into the biological filler tower, the biological filler is controlled to keep 20-80% of humidity, and the moderate propagation of the desulfurization microorganisms is ensured. And discharging the residual nutrient liquid while spraying, so that the transformed product of the microorganism is discharged. If the air content in the harmful sulfur-containing foul waste gas to be treated is too low, fresh air should be supplemented to facilitate the growth of microbial films in the biological filler. After the waste gas is introduced into the biological packed tower, the flow direction of the gas in the tower is the same as or opposite to the flow direction of the sprayed nutrient solution. The reaction process is a continuous process. The sprayed nutrient solution can adopt purified water which is biochemically treated in a petrochemical sewage treatment facility for discharging sulfide malodorous gases, and is properly matched with other medicaments. The reaction product can be sent to a sewage treatment facility for treatment.
The invention is illustrated by the examples and figures.
In the refining process of sulfur-containing crude oil and the processing process of related products, harmful sulfur-containing foul waste gas is often generated. For example, sulfide malodorous substances are discharged at the same time during operations such as product sampling, device maintenance, tail gas evacuation, sewage treatment and the like. The sulfur-containing malodorous waste gas emission sources have different concentrations of sulfide in the emitted waste gas. For example, harmful sulfur-containing malodorous gas discharged from sewage treatment facilities often contains 5-80 μg/g hydrogen sulfide, 1-15 μ g/g methyl mercaptan, 0.1-3.0 μ g/g methyl sulfide, 0.1-5.0 μ g/g dimethyl disulfide, etc. These sulfides can be metabolized by microorganisms. Activated sludge from sewage treatment facilities that produce such pollutants often contains desulfurization microorganisms that metabolize such sulfides. Adding 0.1-5.0 w% of sodium phosphate, 0.1-3.0 w% of potassium phosphate inorganic salt, 0.1-2.0 w% of sodium thiosulfate and NO into the activated sludge from the sewage treatment facility3 -、Mg2+And (3) carrying out enrichment domestication for 5-25 days in an aeration mode with the nutrient elements, and then removing sediments of the activated sludge liquid to obtain a bacterial liquid containing the desulfurization microbial community mainly comprising thiobacilli. Adding 0.1-5.0 w% of sodium phosphate, 0.1-3.0 w% of potassium phosphate inorganic salt, 0.1-2.0 w% of sodium thiosulfate, 0.1-5.0 w% of peptone or beef extract and NO into the bacterial liquid3 -、Mg2+Soaking porous granular or fibrous carrier with the nutrient elements, introducing sulfur-containing malodorous gas, and performing enrichment acclimation for 3-20 days to obtain biological filler with activity of removing sulfide malodorous substances, wherein the surface of the biological filler contains sulfide malodorous substancesThere is a microbial film. The biological filler is filled in a reactor to form a biological filler tower. The sulfur compound foul waste gas is led into the biological packing tower, and the waste gas flows through the biological packing layer. Purified water discharged from a sewage biochemical treatment facility can be supplemented with part of nutrient solution, mixed and introduced into a biological packed towerAnd spraying to the packing layer through a nozzle arranged at the upper part of the packing layer. The supplementary nutrient solution mainly contains 0.1-3.0 w% of sodium phosphate, 0.1-2.0w% of potassium phosphate inorganic salt, and NO3 -、Mg2+And nutrient elements, which make the nutrient solution a buffer solution with acid and alkali shock resistance. By regularly spraying nutrient solution into the tower, the biological filler is controlled to keep 20-80% of humidity, and the microbial film on the surface of the filler obtains nutrient substances required by proper reproduction from the spray solution. The humidity of the biological filler is preferably not more than 80%, otherwise, a liquid phase isolation layer is formed on the outer layer of the microbial film on the surface of the filler, so that the mass transfer efficiency between sulfur-containing harmful substances and oxygen in the waste gas and the thiobacillus in the filler is reduced, and the purification efficiency of the waste gas is reduced. When the waste gas flows through the packing layer, the contained sulfide malodorous substances are adsorbed on the biological packing, and are metabolized by the desulfurization microbial community mainly comprising thiobacillus in the microbial membrane to be converted into acidic substances. Because the concentration of sulfur-containing malodorous substances in the waste gas is low, and the regular spraying operation provides a buffer environment for the microbial film, the acidic metabolites of the desulfurization microbial community can be completely converted into sulfate neutral harmless substances. The microbial film comprises desulfurization microbial community which is partially proliferated in the process of metabolizing sulfide malodorous substances. When the residual nutrient liquid is discharged, the sulfate substances, other metabolites of the microbial membrane and part of the over-proliferated microorganisms are discharged together. The discharged purification reaction product can be sent to a sewage biochemical treatment facility for treatment. The gas flowing out of the biological filler layer, namely the purified odorless gas without sulfide, can be discharged into the atmosphere from the outlet of the biological filler tower. The purification reaction may be carried out continuously. The reaction formula for transforming sulfide by desulfurization microorganisms is as follows:
compared with the prior art, the filler layer of the invention is in a non-liquid phase state, which is beneficial to the contact and diffusion of waste gas and thiobacillus, thereby not only having high purification rate, but also reducing pressure. In addition, no chemical is added except for spraying nutrient solution in the process, so that the consumption of raw materials and secondary pollution are reduced.
FIG. 1 is a schematic flow diagram of one embodiment of the process.
FIG. 2 is a schematic flow diagram of another embodiment of the process.
Example 1
Harmful sulfur-containing odorous waste gas discharged by sulfur-containing crude oil refining and related product processing enterprises is introduced into a biological packed tower 5 through a tower inlet 4 by a harmful sulfur-containing odorous waste gas discharge facility 1, a sewage biochemical pretreatment facility 2 and a sewage biochemical treatment facility 3. If the air content in the exhaust gas is too low, fresh air should be supplemented to facilitate the growth of the microbial film in the biological filler. 2L of activated sludge solution was taken out from the facility 3 in advance, and 0.7 w% of sodium phosphate and 0.5 w% of potassium phosphate, 0.3 w% ofsodium thiosulfate, and NO were added3 -、Mg2+And carrying out enrichment and domestication on the nutrient elements for 20 days, and separating and removing sediments of the activated sludge liquid to obtain a bacterial liquid containing the desulfurization microbial community mainly comprising thiobacillus. Transferring the resultant solution to a 50L container, adding 0.2 w% sodium phosphate and 0.1 w% potassium phosphate, 0.1 w% sodium thiosulfate, 0.2 w% peptone, and NO3 -、Mg2+Soaking a plastic carrier with the diameter of 25mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment acclimation for 18 days to obtain the biological filler 6 for removing the activity of the sulfide malodorous substances. Packing 6 is packed in the column 5. Harmful sulfur-containing malodorous waste gas passes upward through a biological filler layer 6 from the bottom of the tower 5, sulfide-type malodorous substances in the harmful sulfur-containing malodorous waste gas are converted into sulfate-neutral harmless substances and other metabolites by microorganisms, and the sulfur-removed malodorous waste gas is discharged into the atmosphere from an outlet 7 at the upper part of the tower 5. The purified water discharged from the facility 3 may be supplemented with part of the nutrient solution from the nutrient solution tank 8, mixed, and passed through the tower 5The upper inlet 9 is introduced into the column and sprays the packing layer through a nozzle 10 provided at the upper part of the packing layer 6. The supplemented nutrient solution mainly contains 0.6 w% of sodium phosphate and 0.4 w% of potassium phosphate, and NO3 -、Mg2+And the like. The spraying liquid flows through the packing layer 6 from the upper part of the packing layer 6 downwards. By regularly spraying nutrient solution into the tower 5, the required humidity of the biological filler 6 is controlled, and the microbial film on the surface of the filler obtains nutrient substances required by proper reproduction from the spray solution. When the nutrient residual liquid is discharged through an outlet 11 at the bottom of the tower 5, sulfate substances, other metabolites of microbial membranes and part of over-proliferated microorganisms are discharged together. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
Table 1 also shows the cleaning effect at a filler humidity of more than 80 w%. As can be seen from the table, when the humidity is greater than 80w%, the pressure drop of the packing layer is obviously improved, and the purification rate is also obviously reduced.
Example 2
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 1L of activated sludge solution was taken out from the facility 3 in advance, and 4.4 w% of sodium phosphate and 2.7 w% of potassium phosphate, 1.8 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 7 days of enrichment and acclimation, the nutrient elements are transferred to a 30L container, and 0.8 w% of the nutrient elements are addedSodium phosphate and 0.5 w% potassium phosphate, 0.3 w% sodium thiosulfate, 0.6 w% beef extract, and NO3 -、Mg2+Soaking the ceramic carrier with the diameter of 16mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment and domestication for 12 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes through the packing layer from the bottom of the tower upwards, and the odorless purified gas is discharged into the atmosphere from an outlet 7 at the top of the tower. Purified water discharged from the facility 3is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 1.2 w% of sodium phosphate and 0.8 w%Potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
Example 3
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 4L of activated sludge solution was taken out from the facility 3 in advance, and 0.3 w% of sodium phosphate and 0.2 w% of potassium phosphate, 0.3 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 24 days of enrichment and acclimation, the nutrient components are transferred to a 80L container, and 4.6w percent of sodium phosphate, 2.4w percent of potassium phosphate, 1.6w percent of sodium thiosulfate, 3.0w percent of beef extract and NO are added3 -、Mg2+Soaking peat carrier with average fiber length of 12mm in the nutrient elements, introducing sulfur-containing malodorous gas, and performing enrichment and acclimation for 5 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes through the packing layer from the bottom of the tower upwards, and the odorless purified gas is discharged into the atmosphere from an outlet 7 at the top of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at theupper part of the tower. The supplemented nutrient solution mainly contains 0.4 w% of sodium phosphate and 0.2 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
Example 4
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. From the facility 3, 8L of activated sludge solution was taken out in advance, and 2.8 w% of sodium phosphate, 1.6 w% of potassium phosphate and 1 were added.2 w% sodium thiosulfate, and NO3 -、Mg2+After enrichment and acclimation for 14 days, the nutrient components are transferred to a 100L container, and 0.4 w% of sodium phosphate, 0.2 w% of potassium phosphate, 0.4 w% of sodium thiosulfate, 1.2 w% of peptone andNO3 -、Mg2+and soaking an asbestos carrier with the average fiber length of 100mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment and domestication for 15 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes through the packing layer from the bottom of the tower upwards, and the odorless purified gas is discharged into the atmosphere from an outlet 7 at the top of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.4 w% of sodium phosphate and 0.2 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
Example 5
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 5L of activated sludge solution was taken out from the facility 3 in advance, and 3.3 w% of phosphoric acid and 2.2 w% of potassium phosphate, 1.4 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 10 days of enrichment and acclimation, the nutrient components are transferred to a 80L container, and 3.2w percent of sodium phosphate, 1.8w percent of potassium phosphate, 1.2w percent of sodium thiosulfate, 3.6w percent of peptone and NO are added3 -、Mg2+Soaking a plastic carrier with the diameter of 25mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment domestication for 8 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes through the packing layer from the bottom of the tower upwards, and the odorless purified gas is discharged into the atmosphere from an outlet 7 at the top of the tower. The purified water discharged from the facility 3 may be discharged from the tank 8Supplementing part of nutrient solution, mixing, and spraying to the packing layer through inlet 9 and nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 2.4 w% of sodium phosphate and 1.8 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
Example 6
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 3L of activated sludge solution was taken out from the facility 3 in advance, and 1.6 w% of sodium phosphate and 1.0 w% of potassium phosphate, 0.6 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 17 days of enrichment and acclimation, the nutrient components are transferred to a 60L container, and 2.6w percent of sodium phosphate, 1.2w percent of potassium phosphate, 0.8w percent of sodium thiosulfate, 2.4w percent of beef extract and NO are added3 -、Mg2+Soaking the fruit shell carrier with diameter of 10mm in the nutrient elements, and introducing sulfur-containing componentAnd (4) performing enrichment acclimation for 10 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes through the packing layer from the bottom of the tower upwards, and the odorless purified gas is discharged into the atmosphere from an outlet 7 at the top of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.2 w% of sodium phosphate and 0.1 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 1 and 2.
TABLE 1H2Purification of S
| Fruit of Chinese wolfberry Applying (a) to Example (b) | Amount of gas to be treated m3/min·m3 Filler material | Foul smell Concentration of μg/g | Purified gas Concentration of μg/g | Packing layer Humidity ％ | Packing layer Pressure drop mmH2O |
Purification |
| 1 | 0.1 | 20 | Not detected out | 50 | 1.4 | 100.0 |
| 2 | 0.2 | 40 | Not detected out | 70 | 2.0 | 100.0 |
| 3 | 0.5 | 60 | Trace amount of | 60 | 1.6 | 100.0 |
| 4 | 1.0 | 60 | 1.2 | 25 | 3.5 | 98.0 |
| 5 | 1.5 | 60 | 2.7 | 40 | 4.8 | 95.5 |
| 6 | 2.0 | 60 | 7.6 | 30 | 8.6 | 87.3 |
| 0.1 | 20 | 2.3 | ＞80％ | 18.0 | 88.5 |
TABLE 2 purification of methyl mercaptan
| Fruit of Chinese wolfberry Applying (a) to Example (b) | Amount of gas to be treated m3/min·m3 Filler material | Foul smell Concentration of μg/g | Purified gas Concentration of μg/g | Packing layer Humidity ％ | Packing layer Pressure drop mmH2O |
Purification |
| 1 2 3 4 6 | 0.1 0.2 0.5 1.0 2.0 | 1 3 5 10 15 | Not detected out Trace amount of 0.05 0.77 3.42 | 70 60 40 25 50 | 1.4 2.0 1.6 3.5 8.6 | 100.0 100.0 99.0 92.3 77.2 |
FIG. 2 is a schematic illustration of another method.
Example 7
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 2L of activated sludge solution was taken out from the facility 3 inadvance, and 0.7 w% of sodium phosphate and 0.5 w% of potassium phosphate, 0.3 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 20 days of enrichment and acclimation, the nutrient components are transferred to a 50L container, and 0.2w percent of sodium phosphate, 0.1w percent of potassium phosphate, 0.1w percent of sodium thiosulfate, 0.2w percent of peptone and NO are added3 -、Mg2+Soaking a plastic carrier with the diameter of 25mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment domestication for 18 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.6 w% of sodium phosphate and 0.4 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
Example 8
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 1L of activated sludge solution was taken out from the facility 3 in advance, and 4.4 w% of sodium phosphate and 2.7 w% of potassium phosphate, 1.8 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 7 days of enrichment and acclimation, the nutrient elements are transferred to a 30L container, and 0.8w percent of the nutrient elements are addedSodium phosphate and 0.5 w% potassium phosphate, 0.3 w% sodium thiosulfate, 0.6 w% beef extract, and NO3 -、Mg2+Soaking the ceramic carrier with the diameter of 16mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment and domestication for 12 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 1.2 w% of sodium phosphate and 0.8 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
Example 9
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 4L of activated sludge solution was taken out from the facility 3 in advance, and 0.3 w% of sodium phosphate and 0.2 w% of potassium phosphate, 0.3 w% of sodium thiosulfate, and NO were added3 -、Mg2+After 24 days of enrichment and acclimation, the nutrient components are transferred to a 80Lcontainer, and 4.6w percent of sodium phosphate and 2.4w percent of potassium phosphate, 1.w6 percent of sodium thiosulfate, 3.0w percent of beef extract and NO are added3 -、Mg2+Soaking peat carrier with average fiber length of 12mm in the nutrient elements, introducing sulfur-containing malodorous gas, and performing enrichment and acclimation for 5 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.4 w% of sodium phosphate and 0.2 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
Example 10
Harmful sulfur-containing malodorous exhaust gas discharged from facilities 1,2 and 3 replenishes fresh air and is sufficientAfter mixing, it is introduced into the column 5 through the inlet 4. 8L of activated sludge solution was taken out from the facility 3 in advance, and 2.8 w% of sodium phosphate and 1.6 w% of potassium phosphate, 1.2 w% of sodium thiosulfate, and NO were added3 -、Mg2+After enrichment and acclimation for 14 days, the nutrient components are transferred to a 100L container, and 0.4 w% of sodium phosphate, 0.2 w% of potassium phosphate, 0.4 w% of sodium thiosulfate, 1.2 w% of peptone and NO are added3 -、Mg2+And soaking an asbestos carrier with the average fiber length of 100mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment and domestication for 15 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.4 w% of sodium phosphate and 0.2 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
Example 11
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 5L of activated sludge solution was taken out from the facility 3 in advance, and 3.3% by weight of sodium phosphate and 2.2% by weight of potassium phosphate were added,1.4 w% sodium thiosulfate, and NO3 -、Mg2+After 10 days of enrichment and acclimation, the nutrient components are transferred to a 80L container, and 3.2w percent of sodium phosphate, 1.8w percent of potassium phosphate, 1.2w percent of sodium thiosulfate, 3.6w percent of peptone and NO are added3 -、Mg2+Soaking a plastic carrier with thediameter of 25mm in the nutrient elements, introducing sulfur-containing malodorous gas, and carrying out enrichment domestication for 8 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. Purified water discharged from the facility 3 is supplied with a part of nutrient solution from a tank 8, mixed, and sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 2.4 w% of sodium phosphate and 1.8 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
Example 12
The noxious sulfur-containing malodorous waste gases discharged from facilities 1,2 and 3, supplemented with fresh air and thoroughly mixed, are introduced into tower 5 through inlet 4. 3L of activated sludge solution was taken out from the facility 3 in advance,adding 1.6 w% sodium phosphate and 1.0 w% potassium phosphate, 0.6 w% sodium thiosulfate, and NO3 -、Mg2+After 17 days of enrichment and acclimation, the nutrient components are transferred to a 60L container, and 2.6w percent of sodium phosphate, 1.2w percent of potassium phosphate, 0.8w percent of sodium thiosulfate, 2.4w percent of beef extract and NO are added3 2-、Mg2+Soaking the fruit shell carrier with the diameter of 10mm in the nutrient elements, introducing sulfur-containing malodorous gas, and performing enrichment domestication for 10 days to obtain the filler 6. The column 5 is filled with a packing 6. The waste gas passes down through the packing layer from the top of the tower and the odorless purified gas is discharged into the atmosphere from the outlet 7 at the bottom of the tower. The purified water discharged from the facility 3 can be supplemented from the tank 8 to a part of the campThe nutrient solution is mixed and then sprayed to the packing layer through an inlet 9 and a nozzle 10 at the upper part of the tower. The supplemented nutrient solution mainly contains 0.2 w% of sodium phosphate and 0.1 w% of potassium phosphate, and NO3 -、Mg2+And the like. The filler 6 is controlled to maintain a desired humidity by periodic spraying. The purified reaction product is discharged with the raffinate through an outlet 11 at the bottom of column 5. The effluent may be sent to facility 3 for treatment. The results are shown in tables 3 and 4.
TABLE 3H2Purification of S
| Fruit of Chinese wolfberry Applying (a) to Example (b) | Amount of gas to be treated m3/min·m3 Filler material | Foul smell Concentration of μg/g | Purified gas Concentration of μg/g | Packing layer Humidity ％ | Pressure drop of packing layer mmH2O |
Purification |
| 7 8 9 10 11 12 | 0.1 0.2 0.5 1.0 1.5 2.0 | 20 40 60 60 60 60 | Not detected out Not detected out Trace amount of 0.8 2.3 5.8 | 50 70 60 25 50 30 | 0.7 1.1 0.8 1.8 2.5 4.4 | 100 100 100 98.7 96.2 90.3 |
TABLE 4 purification of methyl mercaptan
| Fruit of Chinese wolfberry Applying (a) to Example (b) | Amount of gas to be treated m3/min·m3 Filler material | Foul smell Concentration of μg/g | Purified gas Concentration of μg/g | Packing layer Humidity ％ | Pressure drop of packing layer mmH2O |
Purification |
| 7 8 9 10 12 | 0.1 0.2 0.5 1.0 2.0 | 1 3 5 10 15 | Not detected out Trace amount of 0.05 0.47 2.76 | 70 60 40 25 50 | 0.7 1.1 0.8 1.8 4.4 | 100 100 99 95.3 81.6 |
Claims (6)
1. A biochemical purification method of sulfur-containing malodorous gas is characterized in that thiobacillus is immobilized on a filler of a filler reactor, the sulfur-containing malodorous gas passes through the reactor, and sulfides are degraded, wherein the humidity of a filler layer is kept to be 20-80% in the gas purification process.
2. The method according to claim 1, wherein the humidity of the packing layer is maintained at 25 to 70% during the gas purification process.
3. A method according to claim 1The method is characterized in that the feeding amount of the sulfur-containing malodorous gas in the reactor is 0.1-2.0 m3/minm3。
4. A method according to claim 1, characterized in that in the gas purification process, when the humidity of the packing layer is lower than 20%, the nutrient solution required for the growth and reproduction of the microorganisms is sprayed to the packing layer from the top of the reactor.
5. A method according to claim 3, characterized in that the nutrient solution comprises 0.1 to 5.0% w of inorganic salts of sodium phosphate, 0.1 to 3.0% w of inorganic salts of potassium phosphate, 0.1 to 3.0% w of sodium thiosulfate, 0.1 to 5.0% w of peptone or beef extract and NO3 -、Mg2+And nutrient solution of nutrient.
6. A method according to claim 1, characterized in that the mixture of metabolites and excess nutrients and water obtained at the bottom of the reactor is discharged to a lagoon for further treatment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN97121666A CN1089021C (en) | 1997-11-24 | 1997-11-24 | Method for purifying gases containing stench sulphureous gases |
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| Application Number | Priority Date | Filing Date | Title |
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| CN97121666A CN1089021C (en) | 1997-11-24 | 1997-11-24 | Method for purifying gases containing stench sulphureous gases |
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| CN97121666A Expired - Lifetime CN1089021C (en) | 1997-11-24 | 1997-11-24 | Method for purifying gases containing stench sulphureous gases |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340326C (en) * | 2004-09-11 | 2007-10-03 | 中国石油化工股份有限公司 | Purification for stink and organic waste gas |
| CN100484611C (en) * | 2007-06-01 | 2009-05-06 | 哈尔滨工业大学 | Biologically deodorizing method |
| CN101172211B (en) * | 2006-10-31 | 2010-04-21 | 中国石油化工股份有限公司 | Method for purifying malodorous gas by regulating biogum filling material |
| CN101664637B (en) * | 2009-09-16 | 2012-03-28 | 湖北省农业科学院植保土肥研究所 | Multilayer mixed culture biological deodorizing filter tower and method for removing malodorous gases |
| CN104324607A (en) * | 2014-10-15 | 2015-02-04 | 宁夏宝塔石化科技实业发展有限公司 | Biological deodorization method for sodium methyl mercaptide tail gas treatment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320947C (en) * | 2004-08-25 | 2007-06-13 | 李晓飞 | Method of deodour using biofiltration |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1468571A1 (en) * | 1987-07-30 | 1989-03-30 | Дзержинский Филиал Государственного Научно-Исследовательского Института По Промышленной И Санитарной Очистке Газов | Method of cleaning gases from hydrogen sulphide |
| AT388313B (en) * | 1987-10-19 | 1989-06-12 | Waagner Biro Ag | METHOD FOR THE MICROBIOLOGICAL CONVERSION OF SULFURIZED POLLUTANTS IN EXHAUST GAS |
| CN1040552C (en) * | 1994-09-06 | 1998-11-04 | 吉林省冶金研究所 | Pre-oxidating method for difficultly beneficiated gold containing ore or concentrated mineral by bacteria |
-
1997
- 1997-11-24 CN CN97121666A patent/CN1089021C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340326C (en) * | 2004-09-11 | 2007-10-03 | 中国石油化工股份有限公司 | Purification for stink and organic waste gas |
| CN101172211B (en) * | 2006-10-31 | 2010-04-21 | 中国石油化工股份有限公司 | Method for purifying malodorous gas by regulating biogum filling material |
| CN100484611C (en) * | 2007-06-01 | 2009-05-06 | 哈尔滨工业大学 | Biologically deodorizing method |
| CN101664637B (en) * | 2009-09-16 | 2012-03-28 | 湖北省农业科学院植保土肥研究所 | Multilayer mixed culture biological deodorizing filter tower and method for removing malodorous gases |
| CN104324607A (en) * | 2014-10-15 | 2015-02-04 | 宁夏宝塔石化科技实业发展有限公司 | Biological deodorization method for sodium methyl mercaptide tail gas treatment |
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| CN1089021C (en) | 2002-08-14 |
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