CN101723560A - Integrated A/O bacteria filter device for treating dispersed wastewater - Google Patents
Integrated A/O bacteria filter device for treating dispersed wastewater Download PDFInfo
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- CN101723560A CN101723560A CN200910247563A CN200910247563A CN101723560A CN 101723560 A CN101723560 A CN 101723560A CN 200910247563 A CN200910247563 A CN 200910247563A CN 200910247563 A CN200910247563 A CN 200910247563A CN 101723560 A CN101723560 A CN 101723560A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- 241000894006 Bacteria Species 0.000 title description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 168
- 239000010865 sewage Substances 0.000 claims abstract description 53
- 238000004062 sedimentation Methods 0.000 claims abstract description 35
- 238000011001 backwashing Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 239000010802 sludge Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 53
- 238000012545 processing Methods 0.000 claims description 20
- 238000005273 aeration Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 239000006228 supernatant Substances 0.000 claims description 11
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- 210000003437 trachea Anatomy 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims 1
- 239000002893 slag Substances 0.000 claims 1
- 238000010992 reflux Methods 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract 2
- 238000011010 flushing procedure Methods 0.000 description 99
- 239000007789 gas Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
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- Biological Treatment Of Waste Water (AREA)
Abstract
本发明涉及一种处理分散生活污水一体化A/O生物滤池装置，装置外形为圆筒状结构，装置中心处设有圆筒形的竖流式初沉池，在内外筒体之间设置隔墙，将空间上划分为调节池、缺氧生物滤池、好氧生物滤池、清水池、储泥池。缺氧生物滤池、好氧生物滤池以及清水池为同心圆弧形结构。调节池内的污水经空气提升器提升入初沉池，沉淀后污水与回流硝化液一起布入缺氧生物滤池脱氮，缺氧池的底部及中间部分设有反冲洗管道，可实现分段反冲洗；缺氧池与好氧生物滤池底部连通，脱氮后污水经好氧生物滤池去除有机物、硝化处理后从表面溢流入清水池出水。装置的反冲洗废水均自流入调节池内，初沉池污泥亦通过空气提升器提升入储泥池。本发明的优点包括：具有去除有机物、脱氮功能；为紧凑的一体化结构，占地面积小；系统设备少，投资、运行费用小；排泥周期较长，便于管理；适用于农村分散污水处理。
The invention relates to an integrated A/O biological filter device for treating dispersed domestic sewage. The device has a cylindrical structure, and a cylindrical vertical flow primary sedimentation tank is arranged at the center of the device, and is arranged between the inner and outer cylinders. The partition wall divides the space into regulating tank, anoxic biological filter, aerobic biological filter, clear water tank and mud storage tank. The anoxic biofilter, the aerobic biofilter and the clean water pool are concentric circular arc structures. The sewage in the adjustment tank is lifted into the primary sedimentation tank by the air lifter. After sedimentation, the sewage and the reflux nitrification liquid are sent to the anoxic biological filter to denitrify. Backwashing; the anoxic pool is connected to the bottom of the aerobic biofilter. After denitrification, the sewage is removed from the organic matter by the aerobic biofilter, and after nitrification treatment, it overflows from the surface and flows into the clear water pool. The backwash wastewater from the device flows into the regulating tank, and the sludge in the primary sedimentation tank is also lifted into the sludge storage tank through the air lifter. The advantages of the present invention include: it has the functions of removing organic matter and denitrification; it is a compact integrated structure with a small footprint; less system equipment, less investment and operating costs; longer sludge discharge cycle, easy to manage; suitable for rural scattered sewage deal with.
Description
Technical field
The present invention relates to a kind of small-scale sewage processing reaction apparatus, particularly a kind of processing dispersed wastewater integrated A/O bacteria filter device at the rural area dispersant type domestic wastewater.
Background technology
China's domestic sewage in rural areas by using and at present most unprocessed river course that directly enters, the severe contamination water body is one of major reason that causes body eutrophication.Therefore, domestic sewage in rural areas by using is handled very necessary.
Because Rural areas resident family disperses, sewage discharge is wide, amount is big, and its collection is focused on needs huge discharge pipe line gathering system, and investment cost is very huge, and therefore centralized sewage disposal pattern is not suitable for processing rural area dispersant type domestic wastewater.And the decentralized type sewage tupe can overcome the some shortcomings of centralized processing pattern, has plurality of advantages: the Infrastructure dependence to sewage network system and complexity is little, is subjected to ectocine little; Invest lowlyer, the construction period is short, instant effect; Be convenient to the water resources recycling; Be suitable for the low decentralized sewage discharge source of the density of population.Especially in China, rural economy also is not flourishing especially, and utilization decentralized type sewage treatment system can reach the sewage disposal purpose at lower cost.
Aerobic biofilter has the core technology of sewage disposal contact-oxidation pool and feedwater rapid filter concurrently, have filtration, absorption, biodegradable effect and need aeration, high filtration velocity, hold back suspended substance, need characteristics such as regular back flushing, do not need to establish again second pond after the biological processing unit, general biologic treating technique processing efficiency is higher, and is responsive unlike activated sludge process to organic loading, hydraulic load, variation of temperature.Improve through for many years, aerobic biofilter develops into upward flow mode (being the air water concurrent) to stream (as BIOCARBONE) down by early stage, such as BIOFOR
, BIOSTYR
, COLOX
, DeepBed
BIOPUR
Etc. various ways.Yet aerobic biofilter mainly is distributed in the Europe, the United States area at present in the application of city domestic sewage treatment plant, and the correlative study of China is relative later with application, and integral body lags behind advanced international standard.
At the rural decentralized wastewater processing feature, the technology of existing aerobic biofilter has the following disadvantages: 1. at the research and the application wretched insufficiency of the processing of rural area decentralized type sewage, existing patent and technology are basically at city domestic sewage or industrial sewage research and development; 2. integrated degree is not high.Existing integrated patent research and development concentrate on substantially in the pond (unit) and realize aspects such as denitrogenation, dephosphorization technique simultaneously, and preprocessing process such as water quantity and quality adjusting, precipitation and sludge handling process etc. are free on outside the integrated apparatus, do not realize integrated on real entire sewage treatment system (whole process) meaning; 3. electric installation is more.Processes such as the lifting of the lifting of sewage, aeration, back flushing, mud and processing all need the electrical equipment of characteristics, and power consumption is bigger; 4. back flushing frequency influences processing power and effluent quality.The filter tank is held back and is mainly occurred in along the initial 0 ~ 30cm packing layer of the direction of current SS in the water inlet and COD, this causes, and head loss increases even the filter tank obstruction in the filter tank, yet when back flushing, carry out back flushing at whole filter tank often, the interception capacity (capacity), back flushing that so not only can not make full use of the filter tank be frequent, big with duration, water consumption, and big to established biofilm disruption, influence initial stage effluent quality and system processing power after the back flushing.
Therefore, at the characteristic feature of rural area dispersed wastewater and carry out entire sewage treatment system (process) integrated design, on the basis of optimizing backwash process, system's logistics is realized by airlift, not only reduced electric installation, save energy consumption and investment, working cost, also improved the stability of processing power and processing.
Summary of the invention
The objective of the invention is at the water quality and quantity of rural area dispersant type domestic wastewater discharging characteristics, provide that a kind of treatment effect is good, stable, investment and working cost is low, the processing dispersed wastewater integrated A/O bacteria filter device of simple and convenient management.
Processing dispersed wastewater integrated A/O bacteria filter device that the present invention proposes, this device is cylinder-like structure, the device center vertically is provided with a cylinder, be preliminary sedimentation tank 7, between inside and outside cylindrical shell, be provided with partition wall, it is divided into equalizing tank 11, anoxic biological filter 12, aerobic biofilter 1, clean water basin 3 and storage basin 4; Wherein, anoxic biological filter 12, aerobic biofilter 1 and clean water basin 3 are concentric(al) circles arc structure;
Equalizing tank 11 comprises water inlet pipe 10 and equalizing tank sewage airlift 9, and water inlet pipe 10 is positioned at equalizing tank 11 pool wall tops, with the sewage drainage pipe connection; Equalizing tank sewage airlift 9 comprises first riser tube 16, first air nozzle 17, first promotes tracheae 18, air discharges case 19, venting port 20, rising pipe 21, oil slick scum silica frost retaining pipe 22 and U-shaped water inlet pipe 23, riser tube 16 and lifting tracheae 18 insert in the equalizing tanks 11, and the top of riser tube 16 is stretched into air and is discharged in the case 19, first promotes tracheae 18 bottoms communicates with first riser tube 16 by first air nozzle 17, first promotes tracheae 18 upper ends links to each other with gas blower 48, rising pipe 21 1 ends discharge case 19 with air and link to each other, the other end links to each other with the pipe core 25 of preliminary sedimentation tank 7, and oil slick scum silica frost retaining pipe 22 is enclosed within U-shaped water inlet pipe 23 outsides; Equalizing tank sewage airlift 9 is fixed on the partition wall of 7 of equalizing tank 11 and preliminary sedimentation tanks by pipe collar 24;
Anoxic biological filter 12 comprises water distributor 28, epimere filter material layer 29, the first back flushing water pipe 30, the first back flushing tracheae 31, segmentation filter screen 32, hypomere filter material layer 33, supporting layer 34, perforate filter plate 35, the second back flushing water pipe 36, the second back flushing tracheae 37 and back flushing draining overflow port 38, water distributor 28 is positioned at 12 tops, anoxic biological filter, plays the effect of water distribution uniformity; The filter material layer of anoxic biological filter 12 is divided into epimere filter material layer 29 and hypomere filter material layer 33 by segmentation filter screen 32, two sections filter material layers are equipped with back flushing tracheae and back flushing water pipe, to realize segmentation, timesharing back flushing, the first back flushing water pipe 30, the first back flushing tracheae 31 are between epimere filter material layer 29 and hypomere filter material layer 33, and the second back flushing water pipe 36, the second back flushing tracheae 37 are positioned at the lower space of anoxic biological filter 12 perforate filter plates 35; Perforate filter plate 35 is used to carry supporting layer 34 and hypomere filter material layer 33; Back flushing draining overflow port 38 is positioned at the partition wall upper position of 11 of anoxic biological filter 12 and equalizing tanks, is higher than normal level of liquid, and backwashing wastewater can flow in the equalizing tank 11 certainly;
Aerobic biofilter 1 comprises perforate water distribution board 39, filter material layer 40, supporting layer 41, the 3rd back flushing tracheae 42, the 3rd back flushing water pipe 43, micropore aeration pipe 44, blast main 45, second effluent weir 46 and back flushing draining overflow port 47, filter material layer 40 is positioned at aerobic biofilter 1 top, supporting layer 41 is positioned at filter material layer 40 bottoms, and micropore aeration pipe 44 is arranged in the supporting layer 41 with blast main 45; The 3rd back flushing tracheae 42, the 3rd back flushing water pipe 43 are positioned at the lower space of the perforate water distribution board filter plate 39 of aerobic biofilter 1; Aerobic biofilter 1 water outlet is collected by second effluent weir 46 and is entered clean water basin 3; Back flushing draining overflow port 47 is positioned at the partition wall top of 11 of aerobic biofilter 1 and equalizing tanks, is higher than normal level of liquid, and backwashing wastewater can flow in the equalizing tank 11 certainly;
Be provided with clear water airlift 8 and rising pipe 6 in the clean water basin 3, phegma airlift 8 comprises the 3rd riser tube 53, the 3rd air nozzle 54 and the 3rd promotes tracheae 55, the 3rd riser tube 53 and the 3rd promotes tracheae 55 and inserts in the clean water basin 3, the 3rd promotes tracheae 55 bottoms communicates with the 3rd riser tube 53 by air nozzle 54, the 3rd promotes tracheae 55 upper ends links to each other with gas blower 48, the end of riser tube 53 extends above the effluent trough of preliminary sedimentation tank 7, is connected with the 3rd back flushing water pipe 43, the second back flushing water pipe 36, the first back flushing water pipe 30; Phegma airlift 8 is fixed on the partition wall of 1 of clean water basin 3 and aerobic biofilter by pipe collar 24; During not back flushing, the clear water in the clean water basin 3 is back to anoxic biological filter 12 by clear water airlift 8 and carries out denitrification denitrogenation; During back flushing, be used for back flushing by 8 liftings of clear water airlift;
Among the present invention, anoxic biological filter 12 and aerobic biofilter 1 all can be selected volcanics biofilter material or clay ceramic grain filter or haydites of book structure filtrate for use, accumulation formula filler---the spherical light ceramic of developing recently such as China Inner Mongol river in Henan Province Fang Tian-volcanics filtrate, Pingxiang, Jiangxi environmental protection company of Canon.
Among the present invention, the particle diameter of filter medium of epimere filter material layer 29 is 4-7mm, and the particle diameter of filter medium of hypomere filter material layer 33 is 1-4mm.
Among the present invention, the particle diameter of filter medium of filter material layer 40 is 1-3mm.
Among the present invention, the first lifting tracheae 18, second promotes on tracheae 52, the 3rd lifting tracheae 55, the first back flushing tracheae 31, the second back flushing tracheae 37, the 3rd back flushing tracheae 42, the blast main 45 and all is connected with air gate valve and air magnetic valve, all be connected with out Water gate valve and go out water solenoid valve on the first back flushing water pipe 30, the second back flushing water pipe 36, the 3rd back flushing water pipe 43, backwashing wastewater relief outlet 47 places are connected with out water solenoid valve.
Compare with existing biological filter technology, beneficial effect of the present invention is embodied in:
1 integrated design: integrate equalizing tank, preliminary sedimentation tank, anoxic biological filter, aerobic biofilter, clean water basin, storage basin, truly realize integrated on entire sewage treatment system (whole process) meaning, compact overall structure, simplified system pipeline, save floor space and work material, reduced cost.
The sewage of 2 equalizing tanks promotes, the mud of preliminary sedimentation tank promotes and nitrification liquid refluxes all realizes by airlift, the aeration of aerobic biofilter, airlift and back flushing usefulness gas are all realized supply by a gas blower, control easily, and greatly reduce electric installation, reduce investment and working cost.
3 anoxic of the present invention biological filters, aerobic biofilter and clean water basin are concentric(al) circles arc structure, and water distribution is even, can reduce the dead angle.
4 the present invention are A/O series connection biological filtering tank process, and wherein the employing of A section filter tank is down to streaming, and back flushing is easy after section dirty the obstruction; 0 section is adopted gas, the liquid streaming that rises in the same way, is difficult for stopping up, and backwashing period is long.
5 anoxic of the present invention biological filters are adopted following to streaming, and according to holding back and remove the pollution substance rule, by filter screen anoxic biological filter filtrate are divided into two sections, and the epimere particle diameter of filter medium is big than hypomere, can improve the filter tank contamination capacity, slows down obstruction.Simultaneously, two sections independently are provided with backwash gas, water pipe, can realize segmentation, timesharing back flushing, flexible operation not only, the backwashing water consumption is little, also makes full use of the retaining power of hypomere filtrate, has avoided back flushing that the biomembranous destruction of hypomere filtrate is influenced effluent quality with undue wash-out.Backwashing wastewater can directly flow into equalizing tank from the filter tank side wall upper part, and is easy to operate.
6 the present invention are provided with storage basin, and sludge discharging period is grown (being half a year), are convenient to management.
7 the present invention can realize commercialization, processing and on-the-spot simple installation, and the civil engineering amount is little, reduced investment.
8 the present invention is directed to rural area decentralized type sewage discharge characteristics and design, and have efficient, low consumption and remove functions such as organism, denitrogenation, and stable, advantages such as the investment working cost is little, simple and convenient management are applicable to that rural decentralized wastewater handles.
Description of drawings
Fig. 1 is for handling dispersed wastewater integrated A/O bacteria filter device vertical view.
Fig. 2 is for handling dispersed wastewater integrated A/O bacteria filter device A-A sectional view.
Fig. 3 is for handling dispersed wastewater integrated A/O bacteria filter device B-B sectional view.
Fig. 4 is the airlift structural representation, and wherein: a is the structural representation of sewage airlift, and b is the structural representation of mud airlift, and c is the structural representation of clear water airlift.
Fig. 5 is the perforate water distribution board, and wherein: a is an anoxic biological filter perforate water distribution board, and b is an aerobic biofilter perforate water distribution board.
Fig. 6 is anoxic pond back flushing water distribution, gas distribution pipe detail drawing.
Fig. 7 is aerobic biofilter water distribution, gas distribution pipe and aeration tube detail drawing.Wherein: a is the aerobic biofilter aeration tube, and b is an aerobic biofilter back flushing gas distribution pipe, c aerobic biofilter back flushing water distributor.
Fig. 8 is for handling dispersed wastewater integrated A/O bacteria filter device process flow sheet.
Number in the figure: 1 is aerobic biofilter, and 2 is the supernatant liquor overflow port, and 3 is clean water basin, 4 is storage basin, and 5 is the mud airlift, and 6 is rising pipe, 7 is preliminary sedimentation tank, and 8 is the clear water airlift, and 9 is the sewage airlift, 10 is water inlet pipe, 11 is equalizing tank, and 12 is the anoxic biological filter, and 13 is dredging tube, 14 is the water leg vent pipe, 15 is the nitrification liquid return line, and 16 is first riser tube, and 17 is first air nozzle, 18 is the first lifting tracheae, 19 for air discharges case, and 20 is venting port, and 21 is rising pipe, 22 are oil slick scum silica frost retaining pipe, 23 is the U-shaped water inlet pipe, and 24 is pipe collar, and 25 is pipe core, 26 is reflector, 27 is effluent weir, and 28 is water distributor, and 29 is the epimere filter material layer, 30 is the first back flushing water pipe, 31 is the first back flushing tracheae, and 32 are the segmentation filter screen, and 33 is the hypomere filter material layer, 34 is supporting layer, 35 are the perforate filter plate, and 36 is the second back flushing water pipe, and 37 is the second back flushing tracheae, 38 are back flushing draining overflow port, 39 is water distribution board, and 40 is filter material layer, and 41 is supporting layer, 42 is the 3rd back flushing tracheae, 43 is the 3rd back flushing water pipe, and 44 is micropore aeration pipe, and 45 is blast main, 46 is effluent weir, 47 are back flushing draining overflow port, and 48 is gas blower, and 49 is house steward, 50 is second riser tube, 51 is second air nozzle, and 52 is the second lifting tracheae, and 53 is the 3rd riser tube, 54 is the 3rd air nozzle, and 55 is the 3rd lifting tracheae.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment 1: as Fig. 1-shown in Figure 8, processing dispersed wastewater integrated A/O bacteria filter device that the present invention proposes is a cylinder-like structure, and virtual height is 1.3m, superelevation 0.2m, and height overall 1.9m, diameter are 1.8m.The device center is a little cylinder, be made as vertical-flow preliminary sedimentation tank 7, between inside and outside cylindrical shell, be provided with partition wall, from the space device is divided into equalizing tank 11, preliminary sedimentation tank 7, anoxic biological filter 12, aerobic biofilter 1, clean water basin 3 and storage basin 4, the area ratio is 1: 2: 6: 9.2: 12.2: 19.Wherein, anoxic biological filter 12, aerobic biofilter 1 and clean water basin 3 are concentric(al) circles arc structure.
Equalizing tank 11 comprises water inlet pipe 10, equalizing tank sewage airlift 9.Wherein, water inlet pipe 10 is positioned at the pool wall top of equalizing tank 11, with the sewage drainage pipe connection; Equalizing tank sewage airlift 9 comprises first riser tube 16 (caliber is 32mm), first air nozzle 17, first and promotes tracheae 18 (caliber is 15mm), air and discharge case 19, venting port 20, rising pipe 21 (caliber is 50mm), oil slick scum silica frost retaining pipe 22 (caliber is 70mm), U-shaped water inlet pipe 23 (caliber is 32mm, and water-in height at the bottom of the pond is 0.4m).Wherein, first riser tube 16 and first promotes tracheae 18 parts and places equalizing tank 11, and rising pipe 21 links to each other with the pipe core 25 of preliminary sedimentation tank 7, and first promotes tracheae 17 links to each other with gas blower 48, controls the lifting flow quantity by charge flow rate.Equalizing tank airlift 9 is fixed on by pipe collar 24 on the partition wall of 7 of equalizing tank 11 and preliminary sedimentation tanks apart from 0.3m place, wall top.
Anoxic biological filter 12 comprises that (the main caliber is 32mm to water distributor 28, branch diameter is 15mm, the perforate aperture is 8mm), epimere filter material layer 29, the first back flushing water pipe 30 (main caliber 25mm, branch diameter is 15mm, the perforate aperture is 8mm), the first back flushing tracheae 31 (main caliber 20mm, branch diameter is 15mm, the perforate aperture is 8mm), segmentation filter screen 32 (being stainless steel), hypomere filter material layer 33, supporting layer 34 (high 15cm, particle diameter of filter medium is 15～20mm), (the perforate aperture is 8mm to perforate filter plate 35, pitch-row is 30mm), the second back flushing water pipe 36 (main caliber 25mm, branch diameter is 15mm, the perforate aperture is 8mm), the second back flushing tracheae 37 (main caliber 20mm, branch diameter is 15mm, and the perforate aperture is 8mm), back flushing draining overflow port 38 (aperture is 50mm).Wherein, water distributor 28 is positioned at the top of anoxic biological filter 12, plays the effect of water distribution uniformity; Anoxic biological filter 12 filter material layers are divided into two sections by segmentation filter screen 32, the particle diameter of filter medium of epimere filter material layer 29 is 4-7mm, thickness 25cm, the particle diameter of filter medium of hypomere filter material layer 33 is 1-4mm, thickness 50cm, two sections filter material layers are equipped with separately independently back flushing tracheae, back flushing water pipe, to realize segmentation, timesharing back flushing; Perforate filter plate 35 is used to carry supporting layer 34 and hypomere filter material layer 33, builds flange in the bottom of pool wall, in order to support filter plate.Back flushing draining overflow port 38 is positioned at the partition wall upper position of 11 of anoxic biological filter 12 and equalizing tanks, and width between centers wall top 12cm is higher than normal level of liquid, and backwashing wastewater can flow in the equalizing tank 11 certainly.
Aerobic biofilter 1 comprises that (the perforate aperture is 8mm to perforate water distribution board 39, pitch-row is 30mm), filter material layer 40, supporting layer 41, the 3rd back flushing tracheae 42 (main caliber 20mm, branch diameter is 15mm, the perforate aperture is 8mm), the 3rd back flushing water pipe 43 (main caliber 25mm, branch diameter is 15mm, the perforate aperture is 8mm), (aperture is 15mm to micropore aeration pipe 44, the perforate aperture is 4mm, and pitch-row is 20mm), blast main 45 (aperture is 20mm), second effluent weir 46 (its water outlet groove width 50mm), back flushing draining overflow port 47 (aperture is 50mm).Wherein, the particle diameter of filter medium of filter material layer 40 is 1-3mm, and thickness 75cm, supporting layer thickness are 15cm, and particle diameter is 15～20mm; Micropore aeration pipe 44 is arranged in the supporting layer 40 back flushing tracheae 42, back flushing water pipe 43 with blast main 45; Aerobic biofilter 1 water outlet is collected by second effluent weir 46 and is entered clean water basin 3; Back flushing draining overflow port 47 is positioned at the partition wall upper position of 11 of aerobic biofilter 1 and equalizing tanks, apart from wall top 20cm, is higher than normal level of liquid, and backwashing wastewater can flow in the equalizing tank 11 certainly.
Be provided with clear water airlift 8 and rising pipe 6 (caliber is 40mm) in the clean water basin 3.Wherein, phegma airlift 8 comprises the 3rd riser tube 53, the 3rd air nozzle the 54, the 3rd promotes tracheae 55 and rising pipe 21 (caliber is 32mm).Wherein, the 3rd riser tube 53 and the 3rd promotes tracheae 55 parts and places the 3rd air nozzle 17 of clean water basin 3, the three lifting tracheaes 18 bottoms to communicate with the 3rd riser tube 16, and the 3rd promotes tracheae 18 upper ends links to each other with gas blower 48.The end of the 3rd riser tube 16 extends above the effluent trough of preliminary sedimentation tank 7, is connected with the 3rd back flushing water pipe 43, the second back flushing water pipe 36, the first back flushing water pipe 30.Phegma airlift 8 is fixed on by pipe collar 24 on the partition wall of 1 of clean water basin 3 and aerobic biofilter apart from 0.3m place, wall top.During not back flushing, the clear water in the clean water basin 3 is back to anoxic biological filter 12 by clear water airlift 8 and carries out denitrification denitrogenation; During back flushing, also be used for back flushing by 8 liftings of clear water airlift.
Anoxic biological filter 12 and aerobic biofilter 1 all can be selected the volcanics biofilter material for use, or accumulation formula filler---the spherical light ceramic developed recently of clay ceramic grain filter, haydites of book structure filtrate and China Jiangxi environmental protection company of Pingxiang Canon.
Flooding velocity is 1m
3/ d, BOD
5Be 180-220mg/L, ammonia nitrogen is 30-50mg/L, and nitrate nitrogen is 1.0-3.0mg/L, and SS is 130-170mg/L.Effluent quality: BOD is 15-25mg/L, and ammonia nitrogen is 3-6mg/L, and SS is 15-25mg/L.
Working process of the present invention is as follows:
(1) sanitary sewage (sewage of domestic grey water, rainwater and process septic tank) flows into equalizing tank 11 voluntarily by drainage pipeline and water inlet pipe 10, and equalizing tank 11 mainly plays the effect of regulating water quality, the water yield.After equalizing tank 11 water inlets arrive certain water level, start sewage airlift 9 sewage is promoted to preliminary sedimentation tank 7.
The sewage lifting gear of equalizing tank 11 does not adopt traditional sewage pump, and adopt a kind of new design device one airlift, its special construction makes it have multiple actions such as lifting sewage, oil removal concurrently, and this can prevent that oil slick is to the unitary influence of subsequent disposal.
(2) in preliminary sedimentation tank 7, sewage is at first flowed through for 25 times from pipe core and is distributed in equably the whole negative area after flow out around it reflector 26 reflection backs, and slowly upwards flow, flow out from being arranged on vertical first effluent weir 27 of pool wall through the supernatant liquor after the clarification, flow into anoxic biological filter 12 by anoxic biological filter water distributor 28 again with its effluent trough UNICOM, but and water distribution uniformity.
(3) in anoxic biological filter 12, sewage flow through successively from top to bottom its epimere filter material layer 31, hypomere filter material layer 33, supporting layer 34 reach the purpose of denitrogenation, enter the bottom of aerobic biofilter 1 at last from 12 bottoms, anoxic biological filter.The two sections filter material layer of anoxic biological filter 12 is carried out segmentation, timesharing back flushing, its at the middle and upper levels backwashing period be one day, lower floor is four days.During flushing lower floor filtrate along band flushing upper strata filtrate, therefore this moment back flushing upper strata filtrate separately.During back flushing upper strata filtrate, only open earlier air gate valve and air magnetic valve on the first back flushing tracheae 31, other valve Close All, separately behind the air purge 3min, open the 3rd again and promote going out Water gate valve and going out water solenoid valve on air gate valve on the tracheae 55 and air magnetic valve, the first back flushing water pipe 30, air water is closed air gate valve and air magnetic valve on the first back flushing tracheae 31 after uniting flushing 5min again, washes 3min separately.Backwashing wastewater flows in the equalizing tank 11 certainly from back flushing draining overflow port 38.During back flushing lower floor filtrate, only open earlier air gate valve and air magnetic valve on the second back flushing tracheae 37, other valve Close All, separately behind the air purge 3min, open the 3rd again and promote going out Water gate valve and going out water solenoid valve on air gate valve on the tracheae 55 and air magnetic valve, the second back flushing water pipe 36, air water is closed air gate valve and air magnetic valve on the second back flushing tracheae 37 after uniting flushing 5min again, washes 3min separately.Backwashing wastewater flows in the equalizing tank 11 certainly from back flushing draining overflow port 38.
(4) in aerobic biofilter 1, first water distribution board 39, supporting layer 40, the filter material layer 41 of flowing through successively from bottom to top from its bottom of sewage, reach degradation of organic substances and nitrated purpose, water outlet enters water leg from second effluent weir 46 at 12 tops, anoxic biological filter after handling, and enters clean water basin (water solenoid valve that goes out on the water leg vent pipe 14 is opened condition at this moment) from water leg vent pipe 14 at last.During normal the operation, open air gate valve and air magnetic valve on the blast main 45, air enters in the aerobic biofilter by blast main 45, micropore aeration pipe 44, and aerobic environment is provided.During back flushing, only open earlier air gate valve and air magnetic valve on the 3rd back flushing tracheae 42, other valve Close All, separately behind the air purge 3min, the backwashing wastewater of opening back flushing draining overflow port 47 places is again discharged magnetic valve, the 3rd and is promoted going out Water gate valve and going out water solenoid valve on air gate valve on the tracheae 55 and air magnetic valve, the 3rd back flushing water pipe 43, after air water is united flushing 5min, close air gate valve and air magnetic valve on the 3rd back flushing tracheae 42 again, wash 3min separately.Backwashing wastewater flows in the equalizing tank 11 certainly from back flushing draining overflow port 47.
(5) in clean water basin 3, during normal the operation, part clear water is back to anoxic biological filter 12 by 8 liftings of clear water airlift and carries out denitrification denitrogenation (reflux ratio is generally 2), the water solenoid valve that goes out on air gate valve on the 3rd lifting tracheae 55, air magnetic valve, the nitrification liquid return line 15 is opened condition at this moment, and another part is discharged outside the ponds by rising pipe 6; During back flushing, the water solenoid valve that goes out on the nitrification liquid return line 15 is closing condition, and the 3rd air gate valve and the air magnetic valve that promotes on the tracheae 55 is opened condition, and clear water promotes by clear water airlift 8 and is used for back flushing.
(6) dredging tube 13 in mud airlift in the preliminary sedimentation tank 75 and the storage basin 4 links, and mud is promoted to storage basin 4 by mud airlift 5.Storage basin 4 side wall upper part are provided with supernatant liquor overflow port 2, and supernatant liquor can be by the 2 direct overflows of supernatant liquor overflow port to equalizing tank 11 after reaching certain liquid.Sludge discharging period is half a year, and mud is transported to relevant treatment unit and focuses on.
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| CN102276063A (en) * | 2011-07-06 | 2011-12-14 | 刘学琳 | Integrated sewage treatment tank structure and manufacturing process thereof |
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