Biological Desulfurization (Biotrickling) - DimWater Engineering

Deodorization process using biological pathway allows smaller teams

Unlike other deodorizing equipment, and teams of DimWater Engineering they not need to use hazardous chemical reagents for the process.

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Detailed Description In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, based on the described embodiments, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed. Example 1 As shown in fig. 1 to 4, a deep bio-deodorization apparatus for sewage treatment includes 2 bio-deodorization units 1 arranged at upper and lower layers; the biological deodorization unit 1 has a three-layer structure, namely a gas distribution water storage layer 11 positioned at the bottom layer, a biological filler layer 12 positioned at the middle layer and a spraying exhaust layer 13 positioned at the top layer; the biological filler layer 12 and the spray exhaust layer 13 are respectively separated by a baffle plate 14 into a biological washing device 15 for humidifying, washing and filtering the odor and a biological filtering device 16 for performing microbial oxidative decomposition and deodorization on the odor; the spray exhaust layer 13 of the biological washing device 15 is communicated with an air inlet pipeline; the spray exhaust layer 13 of the biological filter device 16 is communicated with an air outlet pipeline; the spray exhaust layer 13 is provided with a washing spray system 2 and a biological regulation spray system 3; the washing spray system 2 is communicated with the biological water circulation system 21 through a pipeline; the bio-conditioning spray system 3 is in communication with a bio-water replenishment system 31 via a conduit. The air inlet pipeline comprises an air inlet main pipe 4, an upper layer air inlet main pipe 41 and a lower layer air inlet main pipe 42 which are separated by the air inlet main pipe 4; the air inlet main pipe 4 is provided with an air inlet main cut-off valve 43; the upper air inlet header pipe 41 and the top plate air inlet 171 of the first biological deodorization unit 17 positioned at the upper layer are communicated to the spray exhaust layer 13 of the biological washing device 15; the lower air inlet header pipe 42 is communicated with a side plate air inlet 172 of the first biological deodorization unit 17 to be arranged in the biological washing device 15, and the air guide box 173 is communicated with an air inlet at the top plate of the biological washing device 15 in the second biological deodorization unit 18 positioned at the lower layer; the upper air inlet main pipe 41 and the lower air inlet main pipe 42 are respectively provided with an air inlet electric valve 44. The biological water circulation system 21 and the biological water replenishing system 31 each comprise an integrated water storage container 22 for storing water, returning water and filtering water, a biological circulation pump 23, a water inlet pipe 24, a water outlet pipe 25 and a water return pipe 26; the filter plate 221 in the integrated water storage container 22 divides the container interior into a raw water chamber 222 and a filter chamber 223; the water return pipe 26 is communicated with the second biological deodorization unit 18 and the raw water cavity 222 of the integrated water storage container 22, and is used for recycling water of the gas distribution water storage layer 11 in the biological deodorization unit 1 into the integrated water storage container 22; the water inlet pipe 24 is communicated with the water supply pipeline 27 and is used for adding clean water into the raw water cavity 222 of the integrated water storage container 22; the raw water cavity 222 is provided with an overflow port 223 and an emptying port 224 which are respectively connected with the wastewater tank 28 through pipelines; the wastewater tank 28 is provided with a submersible sewage pump which is communicated to the coagulating sedimentation tank through a pipeline; the wastewater tank 28 is provided with a pH meter, a liquid level meter, a turbidity meter, and the like. The filter chamber 223 is connected to the washing spray system 2 and the biological regulation spray system 3 of each spray exhaust layer 13 through pipelines and 3 biological circulation pumps 23, and the washing spray system 2 and the biological regulation spray system 3 are provided with atomizing nozzles 32; the filter cavity 223 is connected with 3 biological circulating pumps 23 through a pipeline, and the two functions are provided; each pipe is provided with a heating device 33 for heating the water. The raw water cavity 222 is provided with a pH meter, a liquid level meter and a turbidity meter and is connected with a controller; the gas distribution water storage layer 11 of the second biological deodorization unit 18 is provided with an evacuation pipe 111 connected with the wastewater tank 28. The first biological deodorization unit 17 and the second biological deodorization unit 18 are laminated through a partition plate 19, and the 2 biological deodorization units 1 independently operate; 8 first air outlet air guide pipes 181 are arranged in the biological filter device 15 of the first biological deodorization unit 18 and the spray air exhaust layer 13 in a penetrating way; the first air outlet air duct 181 is communicated with an air outlet 174 of the spraying exhaust layer 13 in the second biological deodorization unit 17 and an air outlet pipeline. A partition plate 19 is arranged between the upper layer and the lower layer of the biological deodorization unit to separate the biological deodorization units of the upper layer and the lower layer so as to ensure that the device can independently operate; wherein, for the biological deodorization unit of the lower layer, 2 air guide boxes 173,8 first air guide pipes 181 are pre-buried in the biological deodorization unit of the upper layer and pass through the partition plate to directly communicate the air inlet pipe and the air outlet pipe of the biological deodorization unit of the lower layer with the outside. The biological filter 15 and the spray exhaust layer 13 of the first biological deodorization unit 18 are provided with 8 second air outlet air guide pipes 182; the second air outlet duct 182 communicates with the air outlet of the spray exhaust layer 13 in the first biological deodorization unit 18 and the air outlet duct. The top plate of the biological deodorization unit 1 is provided with a plurality of charging holes 183 and an overhaul hole 184; the biological deodorization unit 1 is provided at a side thereof with an overflow pipe 185 and a drain pipe 186. The air outlet pipeline comprises an air outlet branch pipe 51 and an air outlet main pipe 52 for converging the air outlet branch pipes; the air outlet branch pipe 51 is provided with an air exhaust electric valve 511 and a demister 512; the air outlet main pipe 52 is communicated with the deodorizing fan 521 and is connected to the air discharging tower 523 through the air discharging barrel 522; the water outlet of the deodorizing fan 521 is connected to the wastewater tank 28 through a pipe. The biological filler layer 12 in the biological washing device 15 is provided with hollow sphere filler, the thickness of the filler is more than 1.5 meters, and the hollow sphere filler is hollow sphere filler, active carbon and the like. The bio-filler layer 12 in the bio-filter apparatus 16 is provided with a microbial filler having a thickness of 1.5 m or more. The double-layer biological device is designed in parallel, and the air inlet pipe and the air outlet pipe are respectively designed independently, so that only 1 set of biological deodorization units 1 can be operated at the stage of low odor operation load in a factory, and the other set of biological deodorization units 1 are used for standby, so that the energy saving and consumption reduction functions are provided for operators of sewage treatment plants while the gas emission concentration is ensured to reach the standard; in addition, the deodorizing fan 521 can run simultaneously under the condition of full load, and can be converted into one-to-one mode under the condition that the load is only 50%, so that the stability of the deodorizing fan 521 in the use process is ensured; the biological deodorization units 1 arranged on the upper layer and the lower layer ensure the uniformity of the air outlet of the equipment under the condition of large air quantity by different air inlet and air outlet pipeline air distribution designs so as to ensure the use efficiency of biological fillers. As can be seen from the horizontal elevation view of the device, the deep biological deodorization equipment has 4 air inlets, namely 2 air inlets of the first biological deodorization unit 17 and 2 air inlets of the second biological deodorization unit 18, each air inlet is provided with a separate air inlet electric valve 44, and the number of the air inlet electric valves 44 is 4; the deep biological deodorization equipment has 16 air outlets 174, namely air outlets 174,8 of the upper-layer first biological deodorization units 17 and air outlets 174 of the second biological deodorization units 18; every 4 air outlets 174 are converged into one air outlet branch pipe 51, and a total of 4 air outlet branch pipes 51 are formed, each air outlet branch pipe 51 is independently provided with an air exhaust electric valve 511 and a demister 512, and the number of the air exhaust electric valves 511 is 4; the exhaust electric valve 511 ensures that the device can be controlled separately in layers; the four air outlet branch pipes 51 are respectively connected with 2 deodorizing fans 521 of the double-layer biological deodorizing equipment after air flow is summarized. When the system runs at full load, 2 deodorizing fans 521 are dual-purpose 0 standby; when the odor concentration of the sewage treatment plant is in low load, only 1 deodorizing fan 521 and 1 set of biological deodorizing units on the upper layer and the lower layer can be started, so that the independent operation of the biological deodorizing units on the upper layer and the lower layer can be realized. Example 2 This embodiment is similar to embodiment 1 except that: in this embodiment, 4 sets of reinforced air-out systems are arranged in the spray exhaust layer 13. The reinforced air outlet system comprises an air pipe and an axial flow fan communicated with the air pipe; the outer wall of the air suction inlet of the air pipe is provided with a hydrogen sulfide online detector, an ammonia online detector, an odor concentration online detector, a temperature online sensor and a humidity online sensor; the controller 7 collects and analyzes the data of each sensor and each detector and controls the axial flow fan to work; an air outlet pipe network system is formed by a plurality of air pipes, an axial flow fan and the like. The air duct is connected to an air outlet branch 51. In the embodiment, the reinforced air outlet systems are respectively arranged at 4 weeks of the spraying exhaust layer 13, so that the air outlet quantity at the periphery of the spraying exhaust layer 13 is reinforced. The advanced biological deodorization device of this embodiment is an outdoor device, and a large-scale device is built outdoors. In the perennial operation process, the biological filtering capacity around the equipment is different due to the influence of the sun-drying time and intensity in different directions and the intensity of cold air, so that the gas concentration in the spray exhaust layer 13 is different. Furthermore, it is difficult to uniformly exhaust air by 8 second air-out air-guide pipes or first air-out air-guide pipes. According to the embodiment, the reinforced air outlet system is arranged, the operation of the axial flow fan can be intelligently controlled according to the data collected by each sensor and each detector, the targeted reinforced exhaust is realized, and the problems of uneven exhaust and the like in the operation process are effectively solved. Example 3 This embodiment is similar to embodiment 2, except that: in this embodiment, a fresh air system is provided inside the bio-filter 12 of the bio-filter 16. The fresh air system comprises an air pipe, a fan communicated with the air pipe and an air conditioning system with refrigeration and heating functions; the wall of the air pipe is provided with a plurality of through holes for ventilation. The air pipe is arranged in the middle of the biological filler layer 12, and a plurality of air pipes are communicated to form a plane ventilation network. And the temperature sensor and the humidity sensor are arranged on the outer wall of the air pipe and are connected with the controller. The air conditioning system is arranged on the outer wall of the biological deodorization unit 1; the air conditioning system transmits gas to the inside of the biological filler layer 12 through a fan and an air pipe; the temperature of the gas is controlled by the controller to output a control signal to the air conditioning system. Example 4 This example is similar to example 3 in that the microbial filler used in the bio-filler layer 12 of the bio-filter apparatus 16 comprises the following materials in parts by weight: the cultured strains in the bio-filler layer 12 include strains that have been used in deodorization engineering, among the species: more than 20 kinds of nitrifying bacteria, sulfur oxidizing bacteria, ammonia oxidizing bacteria, spore bacteria, pseudomonas and the like. A deodorizing method for a deep biological deodorizing apparatus for sewage treatment, comprising the steps of: s1, opening an air inlet total cut-off valve 43 and an air inlet electric valve 44, and introducing odor with the air inlet temperature of 0-40 ℃ into a biological washing device 15 through an air inlet pipeline to spray an air exhaust layer 13; the washing spray system 13 in the biological washing device 15 operates, and the atomizing nozzle 32 fully atomizes water and then mixes the water with odor so that the humidity of the odor reaches a saturated state; s2, the odor in the saturated state passes through the biological filler layer 12 of the biological washing device 15 from top to bottom to remove harmful components; then, the odor after biological washing treatment is led into a biological filter device 16 through the gas distribution water storage layer 11; s3, the microbial filler of the biological filler layer 12 in the biological filter device 16 is fully contacted with odor for reaction, and is discharged through an air outlet pipeline after deodorization. The temperature sensor and the humidity sensor in the fresh air system monitor the temperature and the humidity in the biological filler layer 12 and feed back to the air conditioning system; blowing air into the biological filler layer 12 through a fresh air system, and adjusting the temperature to 5-40 ℃; the biological filler layer 12 is sprayed by the biological regulation spraying system 3, and the humidity is regulated to be 30% -60%. The pH of the water in the biological water circulation system 21 is kept between 1 and 3; starting a biological circulating pump 23 to convey water into the washing spray system 15; meanwhile, the water in the gas distribution water storage layer 11 in the biological deodorization unit 1 is recycled into the integrated water storage container 22 through the water return pipe; the biological water replenishing system 31 starts the biological circulating pump 23 to convey water to the biological regulation spray system 3, and at the same time, the water in the gas distribution water storage layer 11 in the biological deodorization unit 1 is recovered into the integrated water storage container 22 through the water return pipe. The pH meter, the liquid level meter and the turbidity meter of the raw water cavity 222 are connected with the controller; the water quality is monitored, and the operation of pumps such as the biological circulating pump 23 is controlled to drain or supplement water, so that the water quality in the filter cavity 223 is kept qualified. 4 sets of reinforced air outlet systems in the spray exhaust layer 13 monitor the gas quality in the spray exhaust layer 13 through a hydrogen sulfide on-line detector, an ammonia on-line detector, an odor concentration on-line detector, a temperature on-line sensor, a humidity on-line sensor and the like on the outer wall of an air suction inlet of an air pipe. The controller collects and analyzes the data of each sensor and each detector and controls the axial flow fan to work; an air pipe net system composed of a plurality of air pipes, an axial flow fan and the like is used for exhausting air. As a preferred embodiment, the thickness of the bio-filler layer 12 is 1.5-2m. As a preferred embodiment, the water storage height of the air distribution water storage layer 11 of the second biological deodorization unit 18 is 450-600 mm. The water storage height of the gas distribution water storage layer 11 of the first biological deodorization unit 17 is 100-150 mm. The air inlet temperature of the odor is 30-40 ℃; the pH of the water in the biological deodorization unit 1 is maintained at 1 to 3. Examples 5 to 6 This example is similar to example 4 in that the microbial filler used in the bio-filler layer 12 of the bio-filter apparatus 16 comprises the following materials in parts by weight: example 5 Example 6 The components Parts by weight of Parts by weight of Volcanic rock with 10-20mm 40 46 Volcanic rock of 30-30mm 5 4 Volcanic rock of 50-60mm 7 6 10-20mm ceramsite 26 20 Dolomite sand stone 3 2 Shredded coconut 12 20 Oyster shell powder 7 2 Comparative example 1 This comparative example is similar to example 4 in that the microbial filler used in the bio-filler layer 12 of the bio-filter apparatus 16 comprises the following materials in parts by weight: comparative example 2 This comparative example is similar to example 4 in that the microbial filler used in the bio-filler layer 12 of the bio-filter apparatus 16 comprises the following materials in parts by weight: the components Parts by weight of Volcanic rock with 10-20mm 30 30-30mm fireShan Yan 3 Volcanic rock of 50-60mm 12 10-20mm ceramsite 30 Dolomite sand stone 2 Shredded coconut 17 Oyster shell powder 10 Comparative example 3 This comparative example is similar to example 4 in that the microbial filler used in the bio-filler layer 12 of the bio-filter apparatus 16 comprises the following materials in parts by weight: the components Parts by weight of Volcanic rock with 10-20mm 60 Volcanic rock of 30-30mm 4.5 Volcanic rock of 50-60mm 6.5 10-20mm ceramsite 20 Dolomite sand stone 2 Shredded coconut 17 Oyster shell powder 15 Analysis of detection results: the wastewater used in examples 4 to 6 and comparative examples 1 to 3 was malodor not deodorized in the same sewage treatment plant, and the initial hydrogen sulfide concentration, ammonia concentration and malodor concentration in the malodor used in examples 4 to 6 and comparative examples 1 to 3 are shown in Table 1. In the deodorizing treatment of examples 4 to 6 and comparative examples 1 to 3, the hydrogen sulfide concentration, the ammonia gas concentration and the odor gas concentration in the odor gas before and after the deodorizing treatment were detected and recorded, and the lower the concentration of various pollutants was, the better the deodorizing effect was, and the experimental results are shown in Table 1. Table 1 comparative table of deodorizing effects of different examples From the odor concentration data in table 1, the microbial filler used in the bio-filler layer 12 of the biofilter unit 16 according to the present application has significantly better deodorizing effect on odor than the schemes of comparative examples 1 to 3. In comparative example 1, since oyster shell powder was not used, trace elements such as copper, magnesium, potassium, phosphorus, manganese, iron, zinc, etc., and various amino acid components contained in the pearl powder layer of oyster shell could not be provided for the growth of microorganisms. Therefore, the ammonia removal rate of comparative example 1 was only 92.6%; whereas the ammonia removal rate of example 1 was as high as 98.6%, significantly higher than 5%. The hydrogen sulfide removal rate of example 1 is as high as 94.5%; the odor concentration is obviously reduced by 93 percent. As is apparent from comparative examples 2 and 3, the respective amounts of 10-20mm volcanic rock, 30-30mm volcanic rock, and 50-60mm volcanic rock vary, so that conditions such as packing density, ventilation and moisture retention of the microbial filler used in the bio-filler layer 12 are significantly changed, which is disadvantageous for the growth of microorganisms, thereby resulting in a direct significant decrease in deodorizing efficiency. It is to be understood that the above examples of the present application are provided by way of illustration only and not by way of limitation of the embodiments of the present application. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are desired to be protected by the following claims.