CN1310134A - Biological rotary cage complete equipment - Google Patents
Biological rotary cage complete equipment Download PDFInfo
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- CN1310134A CN1310134A CN00113290A CN00113290A CN1310134A CN 1310134 A CN1310134 A CN 1310134A CN 00113290 A CN00113290 A CN 00113290A CN 00113290 A CN00113290 A CN 00113290A CN 1310134 A CN1310134 A CN 1310134A
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- Y—GENERAL 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
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Abstract
The present invention relates to biochemical organic waste water treating equipoment. The treating equipment includes biological rotary cage assembly, reactor and driving and controlling mechanism. There are n partition boards inside the reactor, and n+1 netted disc rotary cages filled with ball or oval biological filling to constitute the biological rotary cage assembly. The present invention has powerful BODs eliminating capacity as well as strong amino nitrogen eliminating, deoxygenation and dephosphorylation and sludge digesting capacity. The equipment has high eliminating rate, great organic load and low power consumption.
Description
The invention relates to organic wastewater biochemical treatment equipment.
The existing organic wastewater biochemical treatment equipment comprises a contact reaction tank (110), a turntable assembly (120), a dragging transmission mechanism (130) and the like.
Refer to fig. 1, 2, 3. The contact reaction tank (110) is internally provided with an open type semi-circular arc reaction area (114), and two ends of the reaction tank (110) are respectively provided with a bearing seat (111). One side of the reaction tank (110) is provided with an inlet pipe (112), and the other side is provided with an outlet pipe (113).
The turntable assembly (120) is composed of a rotating shaft (121), a turntable bracket (122) and a plurality of round flat disks (123) with the same size and shape. The round flat disk (123) is fixed on the turntable support (122). Theturntable bracket (122) is fixed on the rotating shaft (121). The distance between the round flat disks (123) is 25-35 mm, and the round flat disks are arranged in parallel. The material is made of material which is easy for bacteria to grow and form a film on the material. Typically polyvinyl chloride plastic, plexiglass reinforced plastic, and the like.
The rotating shaft (121) vertically and concentrically penetrates each round flat disk (123). The diameter of the round flat disk (123) is about 0.8-3.5M. The shaft length of the rotating shaft (121) is about 1.5-7.5M. Bearing boxes (124) are fixed at two ends of the rotating shaft (121), the turntable assembly (120) is located on the contact reaction tank (110) through the coupling of the bearing boxes (124) and the bearing seats (111), and the round flat disk (123) can rotate around the axis in the reaction zone (114).
A driven gear (125) is arranged at the position 20-60 mm away from the outer side of the bearing box (124) at one end of the rotating shaft (121).
The dragging transmission mechanism (130) consists of a speed reducing base (131), a speed regulating motor (132), a speed reducer (133), a chain wheel (134), a chain (135), an intermediate gear (136), a cable, a bracket, a base and the like. The driven gear (125) is meshed with the intermediate gear (136), and the turntable assembly (120) is dragged to rotate at a required speed through the transmission of the chain wheel (134), the chain (135), the speed reducer (133) and the motor (132).
The process principle is as follows:
the sewage flows into a reaction area (114) contacting the reaction tank (110) from a water inlet pipe orifice (112), and 40-55% of the round flat disk (123) is immersed in the sewage. Organic pollutants in the sewage are subjected to biochemical reaction with the biological film on the round flat disc (123), and then clear water is discharged through the water outlet pipe (113). The hydraulic retention time is about 1.5 to 3.5 hours.
The biological membrane is formed by transplanting strains, adding nutrient substances, gradually increasing sewage load, cultivating for a long time, domesticating and forming a membrane.
The thickness of the biological membrane is about 1-3 mm, the surface layer of the membrane is an aerobic bacteria membrane, the inner layer is an anaerobic bacteria membrane, and the middle is a facultative bacteria membrane. Protozoa and metazoan also grow on the biofilm.
The biofilm is alternately in contact with air and sewage. When the biological membrane is immersed in the sewage, the organic pollutants in the sewage are adsorbed by the biological membrane; when the biofilm is in contact with air, a thin attached water layer is formed on the surface of the biofilm, and the water layer absorbs oxygen from the air and discharges microbial metabolite CO into the air2≈ N2The gas ↓ and the like continuously oxidize and decompose the organic substances adsorbed by the biofilm in the air and the sewage in the entire rotation process of the turntable assembly (120) by the microorganisms. The water quality is purified.
On the other hand, the adsorbed oxygen in the adhered water layer is supersaturated and carried into the waste water in the reaction zone (114) by mass transfer to increase the dissolved oxygen. The biological membrane is continuously thickened, and the aged biological membrane is peeled off under the action of the shearing force between water flows and flows into the next-stage biological rotating disc along with the effluent.
The following problems can not be solved completely, and the requirements of sewage treatment (including water quality index increase, investment ratio, landoccupation, operation cost and the like) are higher and higher, so that the method can not adapt to the situation of severe environmental protection. Has been used little by little since the 90 s.
These problems are as follows:
①, high investment, and low concentration city comprehensive sewage treatment in BOD5Less than or equal to 150mg/L, required BOD5When the standard is less than or equal to 20mg/L, ten thousand M3Above the d specification, the investment ratio of biochemical part is about 550-600 yuan/dM3. Total engineering investment about 1250 yuan/dM3. The investment ratio of the urban comprehensive sewage with medium and high concentration and other industrial sewage is higher. Is far from acceptable in the developing countries.
②, and has large floor area, 10 ten thousand M3The total land occupation of the/d low-concentration urban comprehensive sewage treatment station is about 50-80 mu.
③, the sludge production amount is only 1/2 to 1/3 times of that of the activated sludge method, 2 times of that of the contact oxidation method and 5 to 10 times of that of the delayed aeration oxidation ditch process, which causes higher investment and operation cost of sludge treatment.
④, the period for adjusting and culturing bacteria and hanging film is too long, generally 30 days to 60 days.
⑤, the denitrification capability of a single turntable is not strong, because the flat plate or wave plate of the turntable is monotonous, the anaerobic bacteria film has few proportion, only a plurality of turntables can be connected in series to operate, and the middle stage is completely immersed in water to form anaerobe, and the better denitrification effect can be obtained.
⑥, low total load rate, proper BOD5When the removal rate is 80-85%, the load rate is only 20-35 g BOD5/dM2. The conversion is that the volume load rate is only 2-3 kg BOD5/DM3. The load rate of the biological filter reaches 9-12 kg BOD5/dM3In contrast, the difference is too large.
⑦, to BOD5The removal rate is not high enough, for example, when the removal rate reaches more than 85%, the load factor is suddenly reduced.
The root cause of the problems is that the specific surface area for hanging the biological membrane is too small and the body is monotonous; facultative bacteria, anaerobic bacteria account for a few proportion and are covered by aerobic bacterial film; the rotating speed cannot be faster, otherwise, a large amount of abnormal falling of the biological membrane occurs at the periphery of the turntable; the thickness of the biological film on the same disc flat sheet (123) is not uniform along with the difference of the radius.
In recent decades, various improved biological rotating discs have appeared, however, the successful improvement is only three, the first is to change a biological film carrier, namely a circular flat disc (123), into a waveform disc and select excellent material materials, and the others are not changed, so that the specific surface area and the rotating speed are improved by 20 to 30 percent, and the processing capacity of the equipment is correspondingly improved by 20 to 30 percent; the second improvement is that a blast aeration porous pipe is additionally arranged at the bottom of the contact reaction tank (110), a driving transmission mechanism (130) is omitted, an air bag is arranged on a turntable assembly (120), and the biological turntable is driven to rotate by utilizing the buoyancy of air aeration, so that the organic matter removing capacity of the equipment is improvedby 15-20%.
And the combination of the two improvements can improve the organic matter removing capacity of the equipment by 30 to 40 percent.
Although the three improvements improve the capability of removing organic matters, namely increase the load factor of the equipment, the removal rate is not improved or slightly improved, and particularly the functions of removing nitrogen and phosphorus are not enhanced. These three improvements also increase the cost of manufacturing the device and/or increase noise.
The three improvements have engineering application examples in the last decade at home and abroad, and particularly the first one is that a series of products are provided by several factories at home. However, the indexes of ammonia nitrogen, phosphorus and the like in the effluent can not meet the current environmental protection requirement; and the land occupation, investment and other aspects are also included, and the domestic application is less. The main reason is that the basic working principle of the biological rotating disk is not changed by the improvements, although the shape of the biological carrier is changed, the process mode is not improved, and the facultative anaerobic biochemical capability is not introduced in the process principle.
In addition, the project of building the biological rotating disc or the improved biological rotating disc together with the primary sedimentation tank and the secondary sedimentation tank appears at home and abroad, the occupied land of the project is reduced, the investment is increased, and other projects are not changed substantially.
The invention aims to thoroughly reform a biological rotating disc, multiply increase the area of an effective biological membrane, change a biological carrier and increase the facultative anaerobic function, thereby greatly improving the organic matter removing capacity and improving the removing rate; greatly improving the functions of removing ammonia nitrogen and phosphorus; meanwhile, the cost is greatly reduced, the occupied area is reduced, and the like.
The invention mainly adopts the modern various gridding ball or egg type biological filling material technology and the anaerobic and aerobic combined engineering technology, simulates the function of animal lungs, and adds spongy balls which can be slightly extruded or porous balls made of elastic materials to be mixed with gridding balls or oval biological filling materials in a biological rotating cage facultative anaerobic gridding cage (cage A) or facultative anaerobic zone (zone A). The characteristic that the biological rotating disc enables water film to transfer mass is reserved and perfected. The object of the present invention is achieved by the following structural features.
The biological rotating cage complete device provided by the invention comprises a biological rotating cage assembly, a reaction tank and a driving control mechanism;
(1) n partition plates are arranged in the groove body of the reaction groove to axially divide the inner space of the reaction groove into (n +1) reaction chambers, wherein n is 0 or a natural number; the odd reaction chambers are communicated with the even reaction chambers through a sleeve sleeved outside the shaft, and a strip-shaped opening is formed in the sleeve and communicated with the reaction chambers; the even reaction chambers are communicated with the odd reaction chambers through a porous water collecting and distributing pipe arranged at the bottom of the reaction chambers;
(2) the biological rotating cage assembly consists of n +1 grid disc-shaped rotating cages, each grid disc-shaped rotating cage consists of a rotating cage framework, grids fixed on the rotating cage framework along the radial direction of the rotating cage and two side plates, spherical or oval biological fillers are filled in the grid disc-shaped rotating cages, and the filling coefficient is 0.65-0.95.
To the sewage treatment of great flow, can further improve above-mentioned net disc rotating cage, be equipped with an interior circle net circle in the net disc rotating cage, divide into the net disc rotating cage inside and outside two major part K arc or trapezoidal six face grid case constitute. K is a natural number greater than 3.
In order to further improve the facultative anaerobic function, sponge balls or porous balls made of elastic materials which can be slightly extruded are added in the facultative anaerobic mesh cage (cage A) or the facultative anaerobic zone (zone A), and the ratio of the total volume of the added sponge balls to the total volume of the mesh biological balls is 5: 95 to 30: 70. The packing coefficient of the biological ball in the grid cage is 0.65 to 0.98, preferably 0.80 to 0.95; and the packing coefficient of the bio-spheres in the aerobic mesh cage (O-cage) or aerobic zone (O-zone) is 0.60 to 0.95, preferably 0.75 to 0.90.
The technological process and the technological principle of the complete biological rotating cage device are as follows:
after coarse slag and coarse suspended matters are removed from the organic wastewater by the pre-settling regulating tank, the organic wastewater flows into the 1 st reaction chamber (212) of the reaction tank (210) from a water inlet pipe (216). In the 1 st reaction chamber, water flows from the periphery of the grid disc-shaped rotating cage (222) to the axis, firstly flows through a six-face grid box (2224), then flows through an inner circle grid ring (2223), flows into a channel (2211) formed by the sleeve (228), the rotating shaft (221) and the annular closing plate (2281) from a strip-shaped opening (2282a) on the sleeve (228), flows out from a strip-shaped opening (2282b) on the sleeve (228), and enters the second reaction chamber (212).
In the second reaction chamber (212), the water flows radially and centrifugally, firstly flows through the inner grid ring (2223), then flows through the six-sided grid box (2224), then flows into the porous water collecting distributor (2121) at the bottom of the reaction chamber (212), and flows into the third reaction chamber (212) from the porous water collecting distributor (2121).
The flow conditions in the third and subsequent odd-numbered reaction chambers (212) are the same as the flow conditions in the first reaction chamber (212); the flow conditions in the fourth and subsequent even-numbered reaction chambers (212) are the same as the flow conditions in the second reaction chamber (212).
In the last 1, namely the (n +1) th reaction chamber (212), water flows centrifugally out of the grid disc-shaped rotating cage (222), then flows into the overflow groove (2101), and flows out of the biological rotating cage complete equipment from the clear water discharge pipe (217).
The rotating cage assembly (220) is driven by the driving mechanism (230) to rotate continuously in the whole process of continuously flowing water through the biological rotating cage complete device.
Along with the continuous rotation of the rotating cage assembly (220), the lattice balls or the oval biological fillers (2225) in the inner circle lattice ring continuously roll in the annular closed space, and the mutual positions are continuously and slightly collided, rubbed and continuously changed; continuously taking in and sending out sewage, and carrying out mass transfer movement with the sewage which passes through the shoulders and the intestines.
70-90% of the volume of the inner circular grid ring is immersed in water, 5-15% of the grid balls or oval biological fillers (2225) in the inner circular grid ring (2223) are exposed to air at each moment, and the rest are immersed in water. Each of the lattice balls or ovoid bio-fillers (2225) within the inner circular lattice loop (2223) is exposed to air with a probability of about 0.05 to 0.15 during each cycle of operation. This micro-aerobic environment provides an excellent microbial environment for facultative anaerobism.
At each time, about 38% to 45% of the total volume of the six-sided grid box (2224) is exposed to air, and during each operating cycle, 38% to 45% of the time each of the grid balls or ovoid packing (2225) in the six-sided grid box (2224) is exposed to air and the remainder submerged in water. In the whole process of rotating along with the rotating cage assembly (220), all the grid balls or the oval biological fillers (2225) in all the six-side grid boxes (2224) continuously roll by themselves, collide with each other and rub with each other while performing circular motion around the rotating shaft (221) in respective six-side grid closed spaces, and the positions of the grid balls or the oval biological fillers are continuously changed. When they are immersed in water, they are continuously taken in and out of the sewage, and continuously take mass transfer motion with the sewage passing through the shoulders and intestines. This oxygen enrichment in the six-sided mesh box (2224) provides an excellent microbial environment for the aerobic flora.
The biological rotating cage complete device is divided into two process areas: one is an aerobic zone, i.e., O zone (O: abbreviation for English OXiC), and the other 1 is a facultative anaerobic zone, i.e., A zone (A: Anacrobic, or abbreviation for Anaxic). The internal space of the six-face grid box (2224)is an O area, and the internal space of the internal grid ring (2223) is an A area. The volume ratio of the area A to the area O is generally 1: 2.5-3.5.
When the gridding ball or oval biological filler (2225) is immersed in the sewage in the A area or the O area, organic matters in the sewage are adsorbed by a biological film on the filler; metabolite (H) of microorganism2O, organic small molecules such as various organic acids and alcohols, ammonia nitrogen and NO3 -Such inorganic molecules) are also excreted in water. When the lattice sphere or oval-shaped biological filler (2225) is exposed to air, the attached water layer on the biofilm adsorbs and dissolves oxygen in the air; metabolizing CO produced by microorganisms2≈ N2And the gas such as ↓ is discharged into the air, and on the other hand, the dissolved oxygen attached to the water layer is higher, and when the dissolved oxygen is transferred to the water again, the dissolved oxygen is transferred to the water.
During the process that the rotating cage assembly (220) continuously rotates, no matter where the biological filler (2225) is located, the biological film on the biological filler continuously carries out biochemical degradation reaction on the adsorbed organic matters. However, in different process areas, the biochemical pattern and function are different.
In the O area, a large number of aerobic flora including charring flora, ammonifying flora, nitrifying flora and the like grow and propagate on the biological film in the biological filler (2225). The biochemical reaction processes of the organic matters in multiple aspects are carried out simultaneously, and the following 3 types are mainly adopted:
1. the carbonization reaction process of organic hydrocarbon. The aerobic charring flora uses aerobic respiration to oxidize and decompose small molecular organic matters (such as alcohols, organic acids, simple sugar and the like) into water and carbon dioxide, and the generated decomposition energy is used for self life activities. The reaction formula is as follows: (taking the example that glucose is completely oxidized)
2. Ammoniation reaction process of organic nitrogen compound. The aerobic ammoniated flora utilizes aerobic respiration to contain nitrogenThe organic macromolecule is oxidized and decomposed into organic micromolecules and releases ammonia Nitrogen (NH)4 +). The reaction formula is as follows: (deamination of amino acids as an example)
3. The nitrification reaction process of ammonia nitrogen, namely the aerobic autotrophic nitrifying bacteria utilize aerobic respiration to release ammonia Nitrogen (NH) released by the reaction of the formula (2) in raw water4 +) Nitric Oxide (NO)3 -) The reaction formula is as follows:
in the area A, a large number of facultative anaerobic flora are grown and propagated on the biological membrane in the biological filler. Including acidifying and hydrolyzing facultative anaerobic flora and facultative anaerobic denitrifying flora. Organic substances and nitric acid Nitrogen (NO) adsorbed thereto by the organic substances3 -) The biochemical reaction process is carried out in two aspects at the same time.
1. The macromolecular organic matters are degraded into acid, alcohol and other organic micromolecules by the acidification hydrolytic flora and discharged into water to supply a carbon source for denitrification in the area A and a carbonized substrate for the next area O. The reaction formula is as follows: (for example, propionic acid and acetic acid are produced by glucose under anaerobic action of propionic acid bacteria)
2. NO excreted from the O-zone by the denitrifying bacteria3 -Reduction to N2And (3) oxidizing and degrading the organic carbon compounds simultaneously by using the formula: the reaction in the A region is seen in formula (5) to increase the pH, and the reaction in the O region is seen in formula (3) to increase the PThe H value is reduced, which leads to feedback inhibition of the growth and reaction rate of the microorganisms in this region. In order to complement the pH value change of each process section, the pH value is stabilized in the optimal range of the microorganism. The biological rotating cage complete device is designed to be operated by a plurality of areas A and O in an alternating and serial mode, namely, a multi-section (N-section) OAO (or A/O) process is operated in a serial mode, wherein N is a natural number.
N = (N +1)/2, N is an odd number of natural numbers;
n=1,3,5,7,9,11……
N=1,2,3,4,5,6,……
n is the number of semicircular flat plate clapboards (211) in the contact reaction tank (210). The number of n is determined by BOD in the sewage5And NH4 +The higher the concentration, the larger n.
For sewage treatment with smaller flow, no inner circle grid ring is arranged in the grid disc-shaped rotating cage, aerobic and facultative anaerobic biological fillers are filled in the grid cages at intervals to form series operation of an A/O process, and the facultative anaerobic grid cage, namely the A cage, respectively corresponds to the A area and the O area, and has the same working principle.
In the above-mentioned N × (OAO) or pre-aeration N (A/O) process flow, in addition to the above-mentioned five main biochemical reactions, a biochemical process of digesting excess sludge is carried out at the same time. Namely, the normal falling-off biological membrane of a certain zone flows into the next zone and the following zones and is decomposed by repeated aerobic and anaerobic digestion. Therefore, the device produces very little sludge. And is easy to be subjected to solid-liquid separation and filter pressing dehydration by the subsequent process.
And the organic phosphorus in the sewage is adsorbed by the biological membrane and is used as inorganic nutrition of microbial bacteria, and is released in the form of orthophosphate in the area A in the process of repeated digestion along with the falling of the biological membrane, and is absorbed in an ultra-large amount by aerobic bacteria in the area O, and finally is fixed on the biological membrane in the area O at the last section and is discharged out of the equipment in the form of sludge, so that the equipment has stronger phosphorus removal capability.
In addition, sponge balls or porous balls made of elastic materials added in the biological rotating cage complete device in the area A are subjected to micro-extrusion and self-weight dehydration by the gridding balls or the oval biological fillers when rotating, the device simulates animal lungs to automatically breathe, and excellent mass transfer is performed to renew internal facultative anaerobes, so that the facultative anaerobe function of the area A is more prominent. The adopted reticular sphere or oval biological filler (2225) has large membrane-hanging surface area and excellent internal and external mass transfer performance. The filler is generally placed with polar fiber, active carbon fiber,magnetic plastic sheet, rubber sponge strip, etc. in the hollow, and the film hanging surface is also any wave shape distortion. The specific surface area of the general effective biofilm formation is about 350-550M2/M3. Produced by many companies in China. The filler can be producedGrowing various bacteria and growing eachSpecies protozoa and metazoans, such as ciliates, ticks, rotifers, etc., live on decaying organisms that are ingested. This is also one reason why the plant produces very little sludge. It is noted that with the development of high-efficiency biological filler technology, especially enzyme technology, at home and abroad, the performance of the biological rotating cage complete equipment provided by the invention is necessarily improved.
In summary, the complete equipment of the biological rotating cage has extremely strong BOD removal effect5(charring) ability, ammonia nitrogen removal, and deoxidation ability (nitrification and denitrification); the ability to remove phosphorus and digest sludge; because the specific surface is large, the PH is stable, and the like, the removal efficiency is extremely high, and the organic load rate is extremely high; and simultaneously oxidize BOD due to denitrification5The oxygen consumption is reduced, and the equipment is energy-saving.
The device also has the advantages of simple structure, convenient operation, short culture and domestication period, low investment, small occupied area, long service life and the like.
The substantive comparison of the complete equipment of the biological rotating cage with the biological rotating disc and the improved biological rotating disc in the aspects of structural principle, process mode, process function, and the like is shown in the table I.
The comparison of the performance parameters is shown in the second table:
the substantial difference between the complete biological rotating cage device and the improved biological rotating disc is very obvious from the first table and the second table. And the comprehensive technical parameters are far superior to the biological rotating disc and the improved type confounded substance rotating disc.
The biological rotating cage complete equipment adopts grid balls or oval biological fillers which are easily purchased in society, the electric appliances and the speed reducers of the motors and the electric appliances are all national standard products, other structural components are generally made of common steel, glass fiber reinforced plastics, plastic plates, reinforced concrete and other materials, and all grid surfaces are made of stainless steel and are easy to manufacture.
The biological rotating cage complete device is almost suitable for the biochemical treatment of all bioengineering industrial organic wastewater, including food and beverage processing industry wastewater, brewing wastewater, fermentation wastewater, domestic sewage, farm wastewater, sugar manufacturing wastewater, starch processing wastewater, slaughter plant wastewater, restaurant wastewater, office, school, hospital industrial and mining residential area, urban comprehensive wastewater and the like; the method is also suitable for biochemical treatment of most of chemical engineering industrial organic wastewater, including biochemical treatment of paper-making middle-stage wastewater, hemp-making and spinning plants, printing and dyeing, leather, coking, petrifaction, chemical fiber, daily chemicals, chemical fertilizers, wool spinning plants, pulp and mooring plants, and part of medical and pesticide wastewater.
The structure of the biological rotating cage complete device can be properly adjusted, for example, a water inlet pipe is arranged on a rear end plate, a water outlet pipe is arranged on a front end plate (the overflow groove also changes the position correspondingly), and for example, the position of a speed reducer base and an intermediate gear base is changed, so that the running performance of the device is not influenced; further, the various positioning dimensions in the apparatus, to the extent described herein, are appropriately scaled up and down, resulting in only negligible waste and processing inconvenience, all without affecting the operational performance of the apparatus.
The number n of the partition plates in the device is determined by tests according to the sewage concentration, once the number n is determined, the operation performance is not influenced by properly adding 1 and subtracting 1, and only a small amount of material and working hours are wasted and saved. However, if the biological rotating cage complete equipment is simplified blindly, for example, the biological rotating disc equipment is only simply modified, the rotating cage assembly (220) replaces the rotating disc assembly (120), the contact reaction tank (110) is not changed, and the water inlet and outlet modes are not changed. The adjustment can cause local short circuit of sewage, the water treatment effect is reduced, the load rate is also greatly reduced, the functions of denitrification and dephosphorization are lost, the energy consumption is also increased, and the quality of the effluent water is not better than that of a biological rotating disk.
Therefore, the invention has obvious novelty, scientificity and greater practicability.
FIG. 1 is a perspective view of a prior art biological rotating disk;
FIG. 2 is a top view of a prior art coaxial multi-stage rotating biological disk;
FIG. 3 is a plan view of a prior art process with multiple biological rotating discs;
FIG. 4 is a schematic cross-sectional view of a plurality of prior art biological rotating discs;
FIG. 5 is a sectional view of embodiment 1 of the present invention;
FIG. 6 is a sectional view of the biological rotary cage in example 1 of the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 5;
FIG. 8 is a sectional view of embodiment 2 of the present invention;
FIG. 9 is a sectional view of the biological rotary cage in example 2 of the present invention;
fig. 10 is a partially enlarged view of fig. 8.
FIG. 11 is a top view of embodiment 1 of the present invention;
fig. 12 is a side view of the front end plate of embodiment 1 of the present invention.
Example 1
Referring to fig. 5, 6, 7, 10 and 11, the biological rotating cage complete device provided by the present invention comprises a biological rotating cage assembly, a reaction tank and a driving control mechanism.
The reaction tank 210 is a semicircular open tank body. The tank body is internally provided with 3 semicircular flat plate clapboards 211 which divide the reaction tank 210 into (n +1) reaction chambers 212 uniformly in the axial direction, and the upper center of each semicircular flat plate clapboard 211 is provided with a semicircular opening which is provided with a sealing seat 213. The seal seat on the odd-numbered semicircular flat plate partition plate is a large seal seat 213a, and the seal seat on the even-numbered semicircular flat plate circuit board is a smallseal seat 213 b. The bottom of each even-numbered semicircular plate partition 211 is provided with a porous water collecting distribution pipe 2121 which connects the two reaction chambers 212 partitioned by the partition 211 at the bottom. Wherein n is an odd number of natural numbers, generally 1-11, and more commonly n =1,3,5,7, 9. This example, n is 3
The front and rear end plates 214a and 214b of the reaction tank have a semicircular opening at the center of the upper portion thereof, and a tank end sealing seat 215 is installed at the opening. The lower part of the front end plate 214a is provided with a water inlet pipe 216, and the upper part of the rear end plate is provided with a clear water discharge pipe 217. A bearing housing 218 is mounted below the both groove end seal housings 215, respectively, an intermediate gear housing 219 is mounted below the bearing housing 218 on the front end plate 214a, and a reduction gear base 2100 is mounted obliquely below the intermediate gear housing 219.
The bearing seat 218, the groove end seal seat 215 and the large and small seal seats 213a,213b of the reaction chamber 210 are coaxial. One side of the (n +1) th reaction chamber 212 of the contact reaction tank 210 is provided with an overflow groove 2101, an overflow plate 2102 is arranged on the overflow groove 2101, the overflow port of the overflow plate 2102 is in a sawtooth shape, the opening angle of the sawtooth is 60-120 degrees, and the opening angle is generally 90 degrees. The overflow plate 2102 is movable up and down on the overflow chute 2101 by a screw 2103. The clear water discharge pipe 217 is communicated with the overflow groove 2101 through an opening on the rear end plate 214 b. Height h of the sawtooth overflow of the overflow plate 21022Is higher than the shaft axis h of the rotating shaft 2211A height h lower than that of an inner circle mesh 2223 described later3And can be appropriately controlled to move up and down by the screw 2103.
In the biological rotating cage assembly device provided by the invention, the rotating cage assembly 220 is composed of a rotating shaft 221, n +1 grid disc-shaped rotating cages 222, a sleeve 228, a large sealing box 223, a small sealing box 224, a shaft end sealing box 225, a bearing box 226 and the like.
A driven gear 237 is mounted on the outermost side of one end of the rotating shaft 221, namely 20-60 mm outside the bearing box 226. The driven gear 237, the large sealing box 223, the small sealing box 224, the shaft end sealing box 225 and the sleeve 228 on the rotating shaft 221 are coaxial.
The lattice disc-shaped revolving cage 222 is composed of a revolving cage frame 2221, two planar lattices 2226 fixed on the revolving cage frame in the radial direction of the revolving cage, and two side plates 2222.
The cage frame 2221 is mounted on the casing 228. The mounting mode can be welding or riveting. The outer side edges are generally flush with the annular sealing plate 2281; the width of which encompasses the width of the strip-shaped opening 2282a or 2282 b. Two rotating cage frameworks 2221 are installed on each sleeve, and the distance between the two rotating cages 2221 is the distance between the two grid disc-shaped rotating cages 222 and is about 80-180 mm.
The two side plates 2222 are circular plastic flat plates and are fixed to the cage frame 2221 by bolts.
A large number of lattice balls 2225 are placed in the lattice disc-shaped rotating cage 222, the filling coefficient is 0.85, and compressible sponge balls 2220 are added in the facultative anaerobic cage, the ratio of the total volume of the added sponge balls to the total volume of the lattice balls is 1: 9, and the total filling coefficient is 0.85.
The reticular sphere or oval biological filler (2225) is easy for the growth of microorganism biofilm formation, has extremely large specific surface area, has excellent comprehensive properties of mass transfer channels and the like. The diameter of the spherical or egg-shaped biological filler (2225) is generally 40-150 mm.
Bearing box (226), axle head seal box (225), big seal box (223), little seal box (224) on pivot (221), bearing frame (218) on reaction tank (210) are located respectively, groove end seal receptacle (215), big and small seal receptacle (213a), (213b), and (n +1) net disk biological rotating cage (222) in the pivot are hung respectively in (n +1) reaction chamber (212), rotate along with pivot (221).
The drive control mechanism (230) of the biological rotating cage complete device consists of an excitation variable-speed motor (231), a speed reducer (232), a chain wheel (234), a chain (235), an intermediate gear (236), a driven gear (237), an electric control cabinet (233), electric wires and the like.
The motor (231) and the speed reducer (232) are directly connected and installed on the speed reducer base (2100), the intermediate gear (236) is installed on the intermediate gear base (219), and the driven gear (237) is installed at the outer end part of a bearing box (226) of the rotating shaft (221). The intermediate gear (236) is coupled with the output shaft of the speed reducer (232) through a chain wheel (234) and a chain (235) on the output shaft, and the intermediate gear (236) is directly meshed with the driven gear (237).
And the electric control cabinet (233) and the excitation variable speed motor (231) are connected through cables.
In the biological rotating cage complete device, dissolved oxygen parameters in each area are manually controlled by a speed regulating motor (231), and can also be manually controlled by the up-and-down movement of an overflow plate (2102) on an overflow trough (2101).
The driving transmission mode can also be simplified into various modes that the speed reducer is directly connected with the driven gear without intermediate gear transition and the like. The sprocket may also be changed to a pulley. The speed regulation can also be changed into belt pulley step speed regulation and the like, and the equipment can normally run.
The control can also design a closed loop consisting of the dissolved oxygen meter, the frequency converter and the programmable controller to carry out automatic control.
The device is adopted to treat the comprehensive sewage ofa certain restaurant and hotel, and the sewage quantity is 300M3/d。
Raw water: CODcxLess than or equal to 600mg/L BOD5Less than or equal to 300 mg/L;
NH4 +less than or equal to 40 mg/L;
calculation of daily BOD removal5Comprises the following steps:
(0.3-0.02)kg/M3×300M3/d=84kg BOD5
using NP lattice balls or oval filler, the load rate is 8kg BOD5/dM3The volume of the cage is 12.4M3Whisker 10.5M3The filling factor in the area A is 0.85.
The reaction tank was 4.4M long and 2.6M wide. The diameter of the rotating cage is 2.2M.
There were 6 cages each 550mm wide.
The installed capacity is 1.1 KW. The rotation speed is 10-14 r/min.
The water inlet and outlet pipes are 100 mm.
The water quality after treatment is as follows:
CODcxless than or equal to 60 mg/L;
BOD5 less than or equal to 20 mg/L;
NH4 +less than or equal to 10 mg/L;
example 2
The same as in example 1 except for the biotransformation cage was used. An inner circle grid ring 2223 is additionally arranged in the biological rotating cage. Referring to fig. 8 and 9,10 the space enclosed by the circular lattice loop 2223, the two side plates 2222 and the casing 228 is a circular connected body in which a large number of various lattice balls or oval biological fillers 2225 and sponge balls 2220 are placed. The filling factor was 0.85. K arcor trapezoidal six face grid case (2224) are arranged into a whole disc around interior circle grid circle (2228), fix on rotating cage skeleton (2221) by the bolt. The arc or trapezoid six-side grid box (2224) is formed into a closed body by fixing 2 plane grids (2226), two radial arc (or plane) grids (2227) and two fan-shaped (or trapezoid) plastic side plates (2228) on a six-side grid box frame (2229). Also placed therein is a plurality of geodetic or ovoid biological fillers (2225) having a packing factor of about 0.85. The mesh aperture of the internal mesh ring (2223) and the six-face mesh box (2224) is generally 15-30 mm.
The device is adopted to treat the comprehensive sewage of a certain restaurant and hotel, and the sewage quantity is 1000M3/d。
Raw water: CODcxLess than or equal to 300mg/L BOD5Less than or equal to 150 mg/L;
NH4 +less than or equal to 40 mg/L;
the daily BOD to be removed 5 is calculated as:
(0.15-0.02)kg/M3×1000M3/d=130kg BOD5
using NP lattice balls or oval filler, the load rate is 8kg BOD5/dM3The volume of the cage is 19.1M3Whisker filler 16.3M3The filling factor in the area A is 0.85.
The reaction tank was 4.8M in length and 2.8M in width. The diameter of the rotating cage is 2.6M.
There were 6 cages each 600mm wide.
The installed capacity is 2.5 KW. The rotation speed is 10-14 r/min.
The water inlet and outlet pipes are 150 mm.
The water quality after treatment is as follows:
CODcxless than or equal to 60 mg/L;
BOD5 less than or equal to 20 mg/L;
NH4 +less than or equal to 10 mg/L;
table one:
| sequence of steps Number (C) | Device Item | Biological rotating disc and improvement Biological rotating disc | Biological rotating cage Complete equipment | Conclusion | |
| 1 | Is provided with Prepare for Knot Structure of the organization | Rotating shaft | Is provided with | Is provided with | Are identical to each other |
| 2 | Reaction tank and drive mechanism | Is provided with | Is provided with | Are identical to each other | |
| 3 | Disc of circular flat or wavetable | Is provided with | Is free of | Distinguish one | |
| 4 | Grid round plate rotary cage | Is free of | Is provided with | Distinction is two | |
| 5 | Worker's tool Art and craft Square block Formula (II) | Biological carrier | Flat or wave plates | Grid biological spherical filler | Distinction of three |
| 6 | Bacterial group species | Is single | Diversification of | Distinction of four | |
| 7 | Oxygen charging mode | Attached water layer absorbs oxygen and blast air | Oxygen absorption by adhering water layer | Same anddifference (D) Is not big | |
| 8 | Biochemical method | Aerobic biochemical treatment | Multistage aerobic and anaerobic | Distinction five | |
| 9 | Worker's tool Art and craft Work (Gong) Can be used for | BOD5 removal capability | Has strong and strong effect | Has effect of strengthening | Are substantially the same |
| 10 | BOD5 removal mode | Direct oxidation | First acidificationPost reoxidation | Distinction six | |
| 11 | Removing ammonia nitrogen | Existence or weakness of | Has effect of strengthening | Seven differences | |
| 12 | Nitration | Existence or weakness of | Has effect of strengthening | Distinction eight | |
| 13 | Denitrification | Is free of | Has effect of strengthening | Distinguishing nine | |
| 14 | It is composed of He has a main body | Sludge digestion | Is free of | Has strong and strong effect | Difference ten |
| 15 | Phosphorus removal | Existence or weakness of | Has strong and strong effect | Distinction eleven | |
Table two:
| sequence of steps Number (C) | Device Item | Biological rotating disc and improved organism Rotary disc | Biological rotating cage Complete equipment | ||
| 1 | Effective specific surface area (biofilm area) | 80～126 M2/M3 | Chinese character shao (a Chinese character of 'shao') | 350～550 M2/M3 | High and excellent |
| 2 | Load factor BOD5kg/dM3 | 2～3 | Is low in | 8～13 | High and excellent |
| 3 | BOD5Removal rate | 80～85％ | Higher, good | 85～95％ | High and excellent in quality |
| 4 | CODcr removal Rate | 70～75％ | Low, poor | 80-95％ | High and excellent |
| 5 | Removal rate of ammonia nitrogen (NH +4) | 20～30％ | Very low, very poor | 87～95％ | High and excellent |
| 6 | Nitrogen nitrate (NH-3) removal rate | 10～20％ | Extremely low, very poor | 86～95％ | High and excellent |
| 7 | Phosphorus removal rate | 10～15％ | Ultra low, poor | 75～85％ | Higher, better |
| 8 | The sludge yield is kg/kg BOD5 | 0.45 | More and good | 0.12 | Super small, excellent |
| 9 | Electricity consumption measurement/kg BOD5 | 0.6～0.7 | Less, good | 0.25 | Specially less, less expensive and excellent |
| 10 | Investment ratio Yuan/d.kg ton BOD5 | 60 ten thousand | Relatively expensive and poor | 25 ten thousand | Cheap, economical and excellent |
| 11 | Occupation of land M2/d, ton BOD5 | 14M2 | Big difference between | 35M2 | Less, less and excellent |
| 12 | Membrane-forming culture period | 45 days | Length and difference | 10 days | Short and excellent |
Claims (4)
1. Biological rotating cage integrated equipment, including biological rotating cage assembly, reaction tank, its characterized in that of drive control mechanism:
(1) n partition plates are arranged in the groove body of the reaction groove to axially divide the inner space of the reaction groove into (n +1) reaction chambers, wherein n is 0 or a natural number; the odd reaction chambers are communicated with the even reaction chambers through a sleeve sleeved on the rotating shaft, and a strip-shaped opening is formed in the sleeve and communicated with the reaction chambers; the even reaction chambers are communicated with the odd reaction chambers through a porous water collecting and distributing pipe arranged at the bottom of the reaction chambers;
(2) the biological rotating cage assembly consists of n +1 grid disc-shaped rotating cages, each grid disc-shaped rotating cage consists of a rotating cage framework, grids fixed on the rotating cage framework along the radial direction of the rotating cage and two side plates, and spherical or oval biological fillers are filled in the grid disc-shaped rotating cages.
2. The biological rotary cage complete equipment according to claim 1, wherein an inner circle grid ring is arranged in the grid disc-shaped rotary cage, and the grid disc-shaped rotary cage is divided into an inner part and an outer part which are K arc-shaped or trapezoid six-sided grid boxes. K is a natural number greater than 3.
3. A biological rotation cage assembly according to claim 1 or claim 2 wherein the facultative anaerobic mesh cages or the facultative anaerobic zones of the biological rotation cage assembly are filled with slightly compressible sponge balls or porous balls of an elastomeric material, the ratio of the total volume increase to the total volume of the mesh bio-balls being from 5: 95 to 30: 70. The filling coefficient of the biological balls in the facultative anaerobic mesh cage or the facultative anaerobic zone is 0.65 to 0.98; and the bio-sphere filling factor in the aerobic mesh cage or the aerobic zone is 0.60 to 0.95.
4. The biological rotating cage kit as claimed in claim 3, wherein the filling factor of the bio-balls in the facultative anaerobic mesh cage or the facultative anaerobic zone is 0.80 to 0.95; and the bio-sphere filling factor in the aerobic mesh cage or the aerobic zone is 0.75 to 0.90.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001132903A CN1163422C (en) | 2000-02-25 | 2000-02-25 | Biological rotary cage complete equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001132903A CN1163422C (en) | 2000-02-25 | 2000-02-25 | Biological rotary cage complete equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1310134A true CN1310134A (en) | 2001-08-29 |
| CN1163422C CN1163422C (en) | 2004-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001132903A Expired - Fee Related CN1163422C (en) | 2000-02-25 | 2000-02-25 | Biological rotary cage complete equipment |
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| Country | Link |
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| CN103641235A (en) * | 2013-12-12 | 2014-03-19 | 北京师范大学 | Downward adsorption-biodegradation rotating disc for processing petrochemical organic wastewater |
| CN104961225A (en) * | 2015-06-26 | 2015-10-07 | 西安建筑科技大学 | Multifunctional integrated sedimentation treatment device |
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| CN110217946A (en) * | 2019-07-03 | 2019-09-10 | 北京工业大学 | Three-level rotating disc type sewage-treatment plant based on biological active filling material |
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2000
- 2000-02-25 CN CNB001132903A patent/CN1163422C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103641235A (en) * | 2013-12-12 | 2014-03-19 | 北京师范大学 | Downward adsorption-biodegradation rotating disc for processing petrochemical organic wastewater |
| CN103641235B (en) * | 2013-12-12 | 2015-08-05 | 北京师范大学 | The descending manner Adsorption-Biodegradation rotating disk of process petrochemical organic wastewater |
| CN104961225A (en) * | 2015-06-26 | 2015-10-07 | 西安建筑科技大学 | Multifunctional integrated sedimentation treatment device |
| CN109231441A (en) * | 2018-04-26 | 2019-01-18 | 知和环保科技有限公司 | The Barrate type reactor of nitrate nitrogen in a kind of removing water |
| CN108706822A (en) * | 2018-05-29 | 2018-10-26 | 重庆工商大学 | Biological rotary cage integration pilot-plant |
| CN108706822B (en) * | 2018-05-29 | 2020-12-15 | 重庆工商大学 | Biological rotating cage integrated pilot plant |
| CN108996663A (en) * | 2018-08-29 | 2018-12-14 | 重庆工商大学 | Sewage disposal device for dynamic regulation sewage treatment strategy |
| CN108996663B (en) * | 2018-08-29 | 2021-05-18 | 重庆工商大学 | Sewage treatment device for dynamically adjusting sewage treatment strategy |
| CN110217946A (en) * | 2019-07-03 | 2019-09-10 | 北京工业大学 | Three-level rotating disc type sewage-treatment plant based on biological active filling material |
| CN111348745A (en) * | 2020-03-30 | 2020-06-30 | 安徽普氏生态环境工程有限公司 | Biological membrane in-situ activation method applied to sewage treatment |
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| Publication number | Publication date |
|---|---|
| CN1163422C (en) | 2004-08-25 |
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