CN209522733U - A kind of residents underground powerless integration compound bio sewage-treatment plant - Google Patents
A kind of residents underground powerless integration compound bio sewage-treatment plant Download PDFInfo
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- CN209522733U CN209522733U CN201822188406.3U CN201822188406U CN209522733U CN 209522733 U CN209522733 U CN 209522733U CN 201822188406 U CN201822188406 U CN 201822188406U CN 209522733 U CN209522733 U CN 209522733U
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Abstract
The utility model discloses a kind of residents underground powerless integration compound bio sewage-treatment plants, anaerobic baffled reactor including being equipped with water inlet, compound bio trickling filter is equipped in anaerobic baffled reactor, the water outlet of anaerobic baffled reactor is communicated with compound bio trickling filter water inlet end, sewage sequentially enters automatic running in anaerobic baffled reactor and compound bio trickling filter by gravity plug-flow, and compound bio trickling filter is equipped with water outlet.The utility model overall process utilizes gravity plug-flow automatic running, and high concentration sewage treatment practical technique is economical and practical, operate, safeguard it is simple and convenient, be not necessarily to power-equipment, achieve the purpose that economize on resources, pollutant process effect is good, the popularization and application suitable for distributing rural domestic sewage treatment.
Description
Technical field
The utility model belongs to technical field of sewage, is related to rural scattered domestic sewage processing equipment, specifically relates to
And a kind of residents underground powerless integration compound bio sewage-treatment plant.
Background technique
China is a developing large agricultural country, and the 6th national census shows that China's people in the countryside account for the whole nation
The 50.32% of total population, and it is sparsely populated, and in addition, the village in China 96% is not provided with sewage disposal system, rural resident is raw
The raw sewage of life birth is largely unprocessed to be just discharged into nearby river, pond waters, natural environment, rainwash, underground water source,
Agricultural land soil etc. is by different degrees of pollution.
Domestic sewage in rural areas feature is that biodegradability is strong, and the content of nitrogen and phosphorous is higher, is substantially free of the noxious materials such as heavy metal.
Emission point dispersion, each household discharge amount is less and the fluctuation of sewage quality water is bigger, and it is larger to collect difficulty, and rural economy and
Professional standards are lower, lack administrative skill specification etc..In addition, people in the countryside it is sparsely populated and generate sanitary sewage amount it is smaller,
Sewage treatment is also influenced by local natural environment, therefore rural domestic sewage treatment process cannot be applied simply at town sewage
Science and engineering skill, existing traditional handicraft are used for distributing rural domestic sewage treatment, and to reach, " urban wastewater treatment firm pollutant is arranged
Put standard " (GB18918-2002) primary standard, required energy consumption is high, cost of investment is high, maintenance management trouble.
Utility model content
The utility model provides a kind of without special for drawbacks described above present in distributing rural domestic sewage treatment
Industry technical staff's operational administrative, compact-sized, at low cost, high treating effect residents underground powerless integrated sewage water are net
Makeup is set.
The technical solution adopted in the utility model is as follows: a kind of residents underground powerless integration compound bio sewage
Processing unit, the anaerobic baffled reactor including being equipped with water inlet, anaerobic baffled reactor is interior to be equipped with compound bio drop filter
The water outlet in pond, anaerobic baffled reactor is communicated with compound bio trickling filter water inlet end, sewage by gravity plug-flow successively into
Enter automatic running in anaerobic baffled reactor and compound bio trickling filter, compound bio trickling filter is equipped with water outlet.
It is equipped with compartment in the anaerobic baffled reactor, and is set around compound bio trickling filter enclosure body periphery,
Downlink flow chamber and uplink flow chamber are formed by baffle plate in each compartment, wherein communicating with water inlet is under first compartment
Row flow chamber, the water outlet of anaerobic baffled reactor use overflow weir, overflow weir be set in the upstream room of last compartment and
Compound bio trickling filter water inlet end communicates.
Preferably, the compound bio trickling filter includes enclosure body, it is sequentially placed and mentions from top to bottom in enclosure body
The two stage biological filter tank of the level-one biofilter from anoxic to aerobic environment, aerobic environment that change for and it is aerobic to anaerobic environment turn
The biofiltration unit of the three-level biofilter of change；The water inlet end is set to above level-one biofilter, and water outlet is set to last
Below level-one biofilter.
Further, one, two, three described biofilter is opening up shell, and the bottom surface of shell was distributed with
Water hole, shell lower section are equipped with supporting element, and shell is provided with filler, and the top of each shell is erected with punched-type water distributing plate；Shell
The top of the punched-type water distributing plate of level-one biofilter is cloth water chamber in ontology, has in water distribution indoor distribution and is connected with overflow weir
Semi-canal type overflow water distributor, between the bottom surface of every level-one biofilter shell and the punched-type water distributing plate of next stage biofilter
Form draft chamber.
Further, grid type splash board is placed in each draft chamber, grid type splash board is located at punched-type water distributing plate
Top.
Further, the draft chamber is respectively arranged with ventilation duct, and the nozzle of ventilation duct upper end is located at ground or more, and pacifies
Equipped with no-power air blower.
A kind of technique carrying out sewage treatment using above-mentioned residents buried type integrated compound bio sewage-treatment plant,
Including anaerobic hydrolysis stage and biofiltration stage；Wherein, larger molecular organics in anaerobic hydrolysis stage degradation sewage, removal portion
Divide organic matter, enter the biofiltration stage after reducing sewage organic loading, removes inorganic pollution and the organic dirt of residue in sewage
Contaminate object.
The anaerobic hydrolysis stage are as follows:, will be to filled with spherical soft-filler in each compartment in anaerobic baffled reactor
The sewage of processing is injected in anaerobic baffled reactor by gravity from the water inlet, and it is anti-that sewage flows successively through anaerobic baffle plate
Each compartment of device is answered, sewage passes through downstream and upstream in each compartment, gradually removes COD in sewage, finally leads to
It crosses overflow weir inflow semi-canal type overflow water distributor and enters cloth water chamber.
The biofiltration stage the following steps are included:
Step (1) cloth water chamber: the perforation on level-one biofilter top is dropped into the sewage of semi-canal type overflow water distributor
Formula water distributing plate is flowed into level-one biofilter by the plate hole of the water distributing plate；
Step (2) level-one biofilter: level-one biofilter shell is provided with haydites of book structure filler, divulges information thereunder
Under the oxygen supply effect of room, level-one biofilter is from anaerobic environment gradually to aerobic environment transition, and in the process, heterotroph utilizes
Carbon source mass propagation, a large amount of to remove COD in sewage, part organic nitrogen is converted into ammonia, and the biomembrane of haydites of book structure filler surface is made
After removing a part of nitrogen with the synchronous nitration and denitrification effect carried out under aerobic-hypoxic microenvironment, successively it is dropped under shell
Grid type splash board, the punched-type water distributing plate of side, sewage are sufficiently oxygenated in the draft chamber below shell in moisture film or drops
It flows into two stage biological filter tank afterwards；
Step (3) two stage biological filter tank: two stage biological filter tank shell is provided with sponge+sponge Iron-complex-filling, in shell
Under the common oxygen supply effect of body upper and lower draft chamber, two stage biological filter tank is under aerobic environment, is flowed into two stage biological filter tank
Sewage through PO4 3-+Fe3+→FePO4It is synchronous after ↓ effect, the effect of polyP bacteria aerobic phosphorus absorption and filler itself suction-operated dephosphorization
Suddenly (2) are successively dropped on the grid type splash board and punched-type water distributing plate below shell, and sewage is in moisture film or drops in shell
It is flowed into three-level biofilter after being sufficiently oxygenated in draft chamber below body；
Step (4) three-level biofilter: three-level biofilter shell is provided with haydites of book structure filler, divulges information above it
Under the action of room, from aerobic environment to anaerobic environment transition, sewage flows through three-level biofilter aerobic environment for three-level biofilter
Section, nitrobacteria mass propagation are converted into NO through a large amount of nitrogen in nitrification sewage3 -And NO2 -Form exist, shale pottery
The synchronous nitration and denitrification effect carried out under the biomembrane effect on particulate filler surface and aerobic-hypoxic microenvironment removes a small amount of nitrogen,
Flow through three-level biofilter anaerobic environment section, the NO in sewage3 -And NO2 -The nitrogen of form is converted into N by denitrification2Row
Out, it is discharged after removing a large amount of nitrogen through water outlet, purified water can be obtained.
A kind of residents buried type integrated compound bio sewage treatment process of the utility model, using buried installation
Power-free integrated compound bio sewage-treatment plant handles distributing domestic sewage in rural areas for the four seasons.
The utility model has the beneficial effects that:
1. utility model device utilizes gravity plug-flow automatic running using device each section difference in height and overall process, it is not necessarily to
Power-equipment achievees the purpose that economize on resources；The compartment being sequentially communicated in the utility model anaerobic baffled reactor is around multiple
It closes bio-trickling filter enclosure body periphery to concentrate and set, meets that integrated design occupied area is small, and structure is simple, can highly collect
It is middle processing sewage, economical and practical.
2. the utility model is by no-power air blower, ventilation duct, grid type splash board and punched-type water distributing plate, using without dynamic
The effect of the splashing reoxygenation of power blower, wind-drawing effect and grid type splash board and punched-type water distributing plate is that aerobic filter tank supplies oxygen, and is improved
Dissolved Oxygen in Water, and then sewage treating efficiency is improved, it is supplied oxygen without power-equipment, energy saving, the fortune for reducing sewage treatment
Row expense is especially suitable for dispersion rural area and uses.
It is stacked 3. biofilter shell at different levels described in the utility model successively discharges in compound bio trickling filter shell
In body ontology, replacement filler is simple and convenient, and assembling, convenient disassembly are convenient for safeguarding.
4. the utility model passes through anaerobism, anoxic, the Aerobic Process for Treatment process being connected in series, degraded by the anaerobic hydrolysis stage dirty
Larger molecular organics in water remove partial organic substances, reduce sewage organic loading, lay the foundation for subsequent processing；Subsequently into
Biofiltration stage, biofiltration stage can load different types of fill out according to sewage quality feature in every grade of biofilter
Material, effectively removes the polluters such as organic matter, the nitrogen phosphorus in sewage, and sludge yield is few, effluent quality is up to standard, stable etc.
Series of advantages, the popularization and application suitable for distributing rural domestic sewage treatment.
5. utility model device uses buried installation, winter can be operated normally, internal component can easy removal assembling,
Without professional technician's Operation and Maintenance, the sanitary sewage disposal of distributing rural area is suitble to promote the use of.
6. the residents underground powerless integration compound bio sewage-treatment plant using the utility model handles agriculture
Village's sanitary sewage, this integrated apparatus is to COD and NH4 +- N has preferable removal effect, meets " urban wastewater treatment firm pollution
Object discharge standard " (GB18918-2002) level-one A standard, TN and TP can satisfy " urban wastewater treatment firm pollutant emission mark
It is quasi- " (GB18918-2002) level-one B standard, water outlet can qualified discharge.
Detailed description of the invention
Fig. 1 is the schematic perspective view of utility model device；
Fig. 2 is the schematic cross-sectional view of utility model device.
In figure: 1 anaerobic baffled reactor, 2 water inlets, 3 anaerobic baffled reactor first compartments, 4 anaerobic baffle plates
Reactor second compartment, 5 anaerobic baffled reactor third compartments, the 4th compartment of 6 anaerobic baffled reactor, 7 baffle plates, 8
Overflow weir, 9 semi-canal type overflow water distributors, 10 compound bio trickling filters, 11 water outlets, 12 ventilation ducts, 13 no-power air blowers, 14 1
Grade biofilter, 15 two stage biological filter tanks, 16 three-level biofilters, 17 grid type splash boards, 18 punched-type water distributing plates, 19 water distributions
Room, 20 level-one draft chambers, 21 second level draft chambers, 22 supporting elements.
Specific embodiment
It is dirty to a kind of residents underground powerless integration compound bio provided by the utility model with reference to the accompanying drawing
Water treatment facilities, technique are described in further detail, and the embodiments of the present invention includes but is not limited to the following example.
As shown in Figure 1, a kind of residents underground powerless integration compound bio sewage-treatment plant, including be equipped with into
The anaerobic baffled reactor at the mouth of a river, anaerobic baffled reactor 1 is interior to be equipped with compound bio trickling filter 10.The anaerobic baffle plate
Be separated into several compartments in reactor 1, and set around the middle and upper part of 10 enclosure body of compound bio trickling filter periphery, each every
Interior forms downlink flow chamber and uplink flow chamber by baffle plate 7, wherein communicated with water inlet be first compartment downstream
Room, the water outlet of anaerobic baffled reactor 1 use overflow weir 8, and overflow weir 8 is set in the upstream room of last compartment.Institute
Stating compound bio trickling filter 10 includes enclosure body, is sequentially placed from top to bottom in enclosure body and provides anoxic to aerobic environment turn
The level-one biofilter 14 of change, the two stage biological filter tank 15 of aerobic environment and the aerobic three-level biological filter changed to anaerobic environment
The biofiltration unit in pond 16.Filter element repeats to be arranged according to demand, wherein one, two, three biofilter is opening court
On shell, the bottom surface of shell is distributed with water hole, supporting element 22 is equipped with below shell, and shell is provided with filler, each shell
Top be erected with punched-type water distributing plate 18；The top of the punched-type water distributing plate 18 of level-one biofilter 14 is cloth in enclosure body
The semi-canal type overflow water distributor 9 being connected with overflow weir 8 is distributed in water chamber 19 in cloth water chamber 19.Positioned at three-level biofilter
The enclosure body side-walls of 16 lower sections are provided with water outlet 11.Wherein, level-one biofilter shell is erected at two by supporting element 22
Above the punched-type water distributing plate of grade biofilter housing tip, level-one draft chamber 20 is formed between the two.Two stage biological filter tank shell
Body is erected above the punched-type water distributing plate of three-level biofilter housing tip, forms second level draft chamber 21 between the two.It is each
Grid type splash board 17 is placed in draft chamber, grid type splash board 17 is supported on 18 top of punched-type water distributing plate, equal with its
Row.The draft chamber is respectively arranged with ventilation duct 12, and the nozzle of 12 upper end of ventilation duct is located at ground or more, and is equipped with unpowered
Blower 13.
Sewage sequentially enters each compartment and compound bio trickling filter 10 of anaerobic baffled reactor 1 by gravity plug-flow
The intracorporal every level-one biofilter automatic running decontamination of shell.
It is preferably provided with four compartments being sequentially communicated in anaerobic baffled reactor 1, successively includes first compartment 3, second
Compartment 4, third compartment 5, the 4th compartment 6, the every compartment of anaerobic baffled reactor 1 all by baffle plate 7 divide for downlink flow chamber and on
Row flow chamber；The side wall upper part of the downlink flow chamber of first compartment 3 drives the mouth of a river 2 into, and overflow is equipped in the upstream room of the 4th compartment 6
Weir 8, overflow weir 8 are connected with 9 one end of semi-canal type overflow water distributor, and 9 other end of semi-canal type overflow water distributor is arranged in compound life
In 10 inner walls of object trickling filter, semi-canal type overflow water distributor 9 is located in water distribution room, is distributed in level-one biofilter housing tip
The top of punched-type water distributing plate 18.
14 shell of level-one biofilter, 15 shell of two stage biological filter tank, three being arranged inside compound bio trickling filter 10
Grade biofilter 16 shell, grid type splash board 17 and punched-type water distributing plate 18 are mutually independent individual, when use successively
It is discharged, is stacked in 10 shell of compound bio trickling filter.
The residents buried type integrated compound bio sewage-treatment plant of the utility model is in the process of running；Specifically such as
Under:
Including anaerobic hydrolysis stage and biofiltration stage；As shown in Figure 1, arrow direction is device water flow inside side in figure
To；To clearly show that device internal structure, the cover board on device top does not represent in figure, this in actual moving process is practical new
Type device top uses cover plate for sealing.
Wherein, larger molecular organics in anaerobic hydrolysis stage degradation sewage, reduce sewage organic loading, subsequently into biology
Filtration stage utilizes the biomembrane effect of Chemicobiological phosphorous removal process effect, the suction-operated of filler itself, filler surface, aerobic ring
It is carried out under the aerobic-hypoxic microenvironment of the denitrification and filler surface formation under nitrification, anaerobic environment under border
Synchronous nitration and denitrification effect, remove the polluters such as dirty Organic substance in water, N, P.
The spherical soft-filler of middle filling, the anaerobic hydrolysis stage in each compartment of anaerobic baffled reactor 1 are as follows:
The sludge of certain sewage treatment plant's secondary sedimentation tank is inoculated in anaerobic baffled reactor 1, sanitary sewage is anaerobic baffled by being arranged in
Water inlet 2 at the top of 3 outer wall of plate reactor first compartment enters device, and the every compartment of anaerobic baffled reactor 1 is sequentially connected in series company
Logical, sewage passes sequentially through the downlink flow chamber and uplink flow chamber of each compartment, and anaerobic baffled reactor 1 can not only play buffering
Effect, and can be improved the biodegradability of sewage, sewage gradually removes COD followed by four compartments, and sewage flows through the 4th
Compartment 6 enters compound bio trickling filter 10 through overflow weir 8 and semi-canal type overflow water distributor 9.
The filtration stage the following steps are included:
Step (1) cloth water chamber: the water outlet of anaerobic baffled reactor 1 enters semi-canal type overflow water distributor 9 by overflow weir 8 and drips
The punched-type water distributing plate 18 that 14 housing tip of level-one biofilter is set up is dropped down onto, is flowed by the plate hole of the punched-type water distributing plate 18
Level-one biofilter 14；
Step (2) level-one biofilter: level-one biofilter 14 is provided with haydites of book structure filler, in level-one draft chamber 20
Under oxygen supply effect, from anaerobic environment gradually to aerobic environment transition, heterotroph utilizes carbon source mass propagation for level-one biofilter 14,
COD is largely removed in sewage, and part organic nitrogen is converted into ammonia, the biomembrane effect of filler surface and aerobic-hypoxic microenvironment
The synchronous nitration and denitrification effect of lower progress removes a part of nitrogen, after successively drip grid type splash board 17 and two thereunder
The punched-type water distributing plate 18 of 15 housing tip of grade biofilter, sewage sufficiently fill in level-one draft chamber 20 in moisture film or drops
Oxygen flows into two stage biological filter tank 15；
Step (3) two stage biological filter tank: two stage biological filter tank 15 is provided with sponge+sponge Iron-complex-filling, logical in level-one
Under the common oxygen supply effect of air compartment 20 and second level draft chamber 21, two stage biological filter tank 15 is under aerobic environment, and it is raw to flow into second level
Sewage in object filter tank 15 is through PO4 3-+Fe3+→FePO4Phosphorus effect and filler itself suction-operated dephosphorization are inhaled in ↓ effect, polyP bacteria,
16 shell of grid type splash board 17 and three-level biofilter similar with described in step (2) afterwards, being successively dropped in below its shell
The punched-type water distributing plate 18 on body top, sewage are sufficiently oxygenated in second level draft chamber 21 in moisture film or drops, and it is raw to flow into three-level
In object filter tank 16；
Step (4) three-level biofilter: three-level biofilter 16 is provided with haydites of book structure filler, in second level draft chamber 21
Oxygen supply effect under, from aerobic environment to anaerobic environment transition, it is good that sewage flows through three-level biofilter 16 for three-level biofilter 16
Oxygen environment section, nitrobacteria mass propagation are converted into NO through a large amount of nitrogen in nitrification sewage3 -And NO2 -Form exist,
The synchronous nitration and denitrification effect carried out under the biomembrane effect of filler surface and aerobic-hypoxic microenvironment removes a small amount of nitrogen, after
Flow through 16 anaerobic environment section of three-level biofilter, the NO in sewage3 -And NO2 -The nitrogen of form is converted into N by denitrification2Row
Out, a large amount of nitrogen are removed, is discharged through water outlet 11, purified water can be obtained, effectively remove the polluter in sewage, so that sewage
Qualified discharge.
The technique biofilter is by no-power air blower 13, the wind-drawing effect of ventilation duct 12, grid type splash board 17 and wears
The splashing reoxygenation of cellular type water distributing plate 18 acts on oxygen supply.
It is formed with certain voidage between the filler particles in every grade of biofilter, can be formed in the outer surface of particle
Local aerobic-hypoxic microenvironment, when water flow flows through the filter tank for loading filler, the difference of the inside and outside flow rate of water flow of filler easy to form
It is different, further, since the inside and outside oxygen supply condition of filler difference, can mention for the microorganism to play a role in sewage disposal process
For suitable living environment, treatment effeciency can be improved.
The present apparatus uses buried installation, and winter can operate normally, and water outlet can be used for afforesting, flush the toilet, and is conducive to disperse
The popularization and application of formula rural domestic sewage treatment.
Embodiment
The treatment scale of device is 0.05m3/d, and integrated apparatus is having a size of 485mm × 485mm × 1140mm, wherein detesting
Oxygen baffled reactor (1) is centered around anaerobic-aerobic compound bio trickling filter (10) surrounding, anaerobic baffled reactor (1) ruler
Very little is 485mm × 485mm × 490mm, and bio-trickling filter (10) is having a size of 265mm × 265mm × 1140mm, level-one biofilter
Height be 330 mm, two stage biological filter tank, three-level biofilter height be 200mm, between adjacent filter tank between be divided into
100mm, hydraulic detention time are for 24 hours that the method for operation is continuous operation, and treatment effect see the table below 1:
The analysis of 1. device treatment effect of table
It is shown according to upper table data, is handled by residents underground powerless integration compound bio sewage-treatment plant
Domestic sewage in rural areas, this integrated apparatus is to COD and NH4 +- N has preferable removal effect, meets " urban wastewater treatment firm dirt
Contaminate object discharge standard " (GB18918-2002) level-one A standard, though undesirable to TN and TP removal, it is also able to satisfy " cities and towns
Wastewater Treatment discharge standard " (GB18918-2002) level-one B standard, water outlet can qualified discharge.
It is noted that the above content is done specifically in conjunction with specific preferred embodiment to the utility model
Bright, the protection scope of the utility model is not limited thereto, and all retouchings done in the spirit and principles of the utility model include
It is within the protection scope of the utility model.
Claims (6)
1. a kind of residents underground powerless integration compound bio sewage-treatment plant, the anaerobism including being equipped with water inlet is rolled over
Flowing plate reactor, it is characterised in that: be equipped with compound bio trickling filter (10) in anaerobic baffled reactor (1), anaerobic baffle plate
The water outlet of reactor (1) is communicated with compound bio trickling filter (10) water inlet end, and sewage sequentially enters anaerobism by gravity plug-flow
Baffled reactor (1) and compound bio trickling filter (10) interior automatic running, compound bio trickling filter (10) are equipped with water outlet
(11).
2. a kind of residents underground powerless integration compound bio sewage-treatment plant according to claim 1,
It is characterized in that: being equipped with compartment in the anaerobic baffled reactor (1), and outside compound bio trickling filter (10) enclosure body
It encloses and sets, form downlink flow chamber and uplink flow chamber by baffle plate (7) in each compartment, wherein communicating with water inlet is the
The water outlet of the downlink flow chamber of one compartment, anaerobic baffled reactor (1) uses overflow weir (8), and overflow weir (8) is set to last
It is communicated in the upstream room of compartment with compound bio trickling filter (10) water inlet end.
3. a kind of residents underground powerless integration compound bio sewage-treatment plant according to claim 2,
Be characterized in that: compound bio trickling filter (10) includes enclosure body, be sequentially placed from top to bottom in enclosure body provide anoxic to
Aerobic environment transformation level-one biofilter (14), aerobic environment two stage biological filter tank (15) and it is aerobic to anaerobic environment turn
The biofiltration unit of the three-level biofilter (16) of change；The water inlet end is set to above level-one biofilter (14), water outlet
(11) it is set to below afterbody biofilter.
4. a kind of residents underground powerless integration compound bio sewage-treatment plant according to claim 3,
Be characterized in that: one, two, three biofilter is opening up shell, and water hole, shell lower section is distributed in the bottom surface of shell
Equipped with supporting element, shell is provided with filler, and the top of each shell is erected with punched-type water distributing plate (18)；Level-one in enclosure body
The top of the punched-type water distributing plate (18) of biofilter (14) is cloth water chamber (19), is distributed in the cloth water chamber (19) and overflow weir
(8) the semi-canal type overflow water distributor (9) being connected, the perforation of the bottom surface and next stage biofilter of every level-one biofilter shell
Draft chamber is formed between formula water distributing plate.
5. a kind of residents underground powerless integration compound bio sewage-treatment plant according to claim 4,
It is characterized in that: being placed in each draft chamber grid type splash board (17), grid type splash board (17) is located at punched-type water distributing plate
(18) top.
6. a kind of residents underground powerless integration compound bio sewage-treatment plant according to claim 4 or 5,
It is characterized by: the draft chamber is respectively arranged with ventilation duct (12), the nozzle of ventilation duct (12) upper end is located at ground or more, and
No-power air blower (13) are installed.
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| CN201822188406.3U CN209522733U (en) | 2018-12-25 | 2018-12-25 | A kind of residents underground powerless integration compound bio sewage-treatment plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109502917A (en) * | 2018-12-25 | 2019-03-22 | 兰州交通大学 | A kind of residents underground powerless integration compound bio sewage-treatment plant and technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109502917A (en) * | 2018-12-25 | 2019-03-22 | 兰州交通大学 | A kind of residents underground powerless integration compound bio sewage-treatment plant and technique |
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