CN101045596A - Aeration inner circulation type garbage infiltration liquid two-phase treatment reactor - Google Patents
Aeration inner circulation type garbage infiltration liquid two-phase treatment reactor Download PDFInfo
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Abstract
A two-phase reactor with aerating and internal circulation functions is composed of a main body divided by a perforated partition into a small liquid-phase aerating cavity containing a gas diffusing plate connected to the aerating pump via tube and a big cavity containing mixed filler, a liquid guide tube communicated to said both cavities via creeping pump, electrical valves at the bottoms of Said both cavities, the percolated liquid collectors, and a time controller connected to all the electric units.
Description
Technical field
The present invention relates to a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor.
Background technology
Landfill method is the garbage treatment mode that generally adopts both at home and abroad, and the domestic waste of the whole world more than 95% disposed by landfill.Physical chemistry and biological chemistry variation can take place behind the garbage loading embeading, and organic matter degradation and rainwater infiltrate the generation that causes a large amount of percolates, and the time length reaches 50 years.Typical percolate contains high concentration COD (6000-15000mg/L) and ammonia nitrogen (500-3000mg/L), very easily causes underground water, surface water pollution, stimulate face of land algae and water growth, cause body eutrophication, destroy aquatic ecosystem, and then jeopardize HUMAN HEALTH.Therefore, percolate is handled extremely people's concern in recent years.
Landfill layer rubbish has entered anaerobism and has produced acid and produce methane phase through after the aerobic decomposition of short-term.The a large amount of VFA that produce at souring stage are the main organism in the percolate, and these organism are degraded by microorganisms easily, and percolate BOD/COD is 0.4-0.5.Producing methane phase, organic aliphatic acid is through the degraded and the conversion of methanobacteria, and concentration reduces greatly, and percolate pH rises to more than 7.0.Along with the prolongation of landfill time, the organism in the percolate mainly exists with polymer soil ulmin form, and BOD/COD is reduced to below 0.1, and biodegradability is relatively poor.Percolate character is to select the main foundation of treatment process, and most of treatment processs are the major objective pollutent with COD and ammonia nitrogen, comprise physics method, chemical method and biological process.Technology such as the physics method mainly contains that sedimentation, gas are carried, absorption and membrane filtration; Chemical method mainly contains technology such as coagulation, chemical precipitation, chemistry or electrochemical oxidation; Biological rule mainly contains aerobic and the anaerobic treatment technology.In actual applications, for improving the combination process that treatment effect often adopts several different methods.
People such as Marttinen find that nano filtering process is 66% and 50% to COD and ammonia-N removal rate, at pH=11, when temperature is 20 ℃, carries through 24 hours gas, can obtain 89% deamination rate, and ozone oxidation can strengthen the biodegradability of percolate.People such as Li adopt the magnesium ammonium phosphate sediment method to remove the percolate ammonia nitrogen, react after 15 minutes, and the percolate ammonia nitrogen concentration is reduced to 110mg/L from 5600mg/L.Steensen utilizes H
2O
2/ UV, O
3Methods such as/stagnant catalyst are handled hardly degraded organic substance, all can obtain the ideal treatment effect.
The pressure filter film technology is applied in the percolate biology treating processes, as combination process: active sludge-ultrafiltration-chemical oxidation, active sludge-ultrafiltration-reverse osmosis etc.Charcoal absorption and active sludge combination process also successfully are applied to percolate and are handled, and for refractory organics organism, colourity efficient removal are arranged all.
Compare with aerobic method, anaerobic process is more suitable for handling high-concentration garbage percolate.Discover that the UASB method can reach 92% to the COD clearance.The anaerobic-aerobic combination process reaches 80-90% to the COD clearance, and ammonia nitrogen reaches more than 80%.Aerobic activated sludge process and biomembrance process also are widely used in percolate and handle.Maehlum adopts the anaerobic-aerobic pool and artificial wet land system to handle percolate, can obtain 70% nitrogen removal rate.People such as Irene adopt the SBR method to handle percolate, and 20-40 days ammonia nitrogen removal franks of process are up to 99%.It is the moving-bed biofilm method processing percolate of filler that people such as Loukidou adopt with polyurethane and granular active carbon, obtains almost 100% ammonia nitrogen and COD clearance.People's applied activated carbon fluidized-bed reactors such as Imai are handled the infiltration liquid difficult degradation organism, obtain 70% clearance.Discoveries such as Cecen add powdered carbon and can strengthen nitrification in Sludge System.Discoveries such as Ahmet Uygur add powdered carbon and help ammonia nitrogen removal in the sbr reactor device.
In recent years, the leachate recirculation technology has also obtained developing rapidly, has carried out some rig-site utilization in developed country, has obtained COD removal effect preferably, but the removal of ammonia nitrogen is not good.In many leachate treatment technologies, absorption method such as gac, zeolite etc. are the methods that present domestic and international research is more and application is wider.There are some researches show that gac is that the percolate clearance of 5690～17000mg/L can reach 95% to the COD starting point concentration.Materialization-life assemblage technology can effectively be handled mature landfill leachate, and Emilia Otal etc. discovers that zeolite has good effect of removing to the percolate ammonia nitrogen.
Summary of the invention
The object of the invention provides a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor.
The aeration inner circulation type garbage infiltration liquid two-phase treatment reactor has support, support is provided with reactor body, by a vertical clapboard reactor body body is divided into two cavitys that differ in size in the middle of the reactor body, 30cm to 35cm zone, vertical clapboard bottom is provided with equally distributed multirow communicating aperture, reactor body big, little cavity bottom is the back taper cavity, in the big cavity of reactor body mixed fillers is housed, filler top is gravel bed, be provided with the water distribution board of horizontal positioned in the middle of the gravel bed, be provided with water distributor above the water distribution board, water distributor is through first peristaltic pump, catheter reaches in the little cavity of reactor body, first peristaltic pump links to each other with the 4th time controller, the big cavity different heights of reactor body is provided with a plurality of first sampling tubes, the back taper cavity bottom of big cavity is provided with automatically controlled water discharge valve, automatically controlled water discharge valve links to each other with the 5th time controller, be provided with the water outlet gathering barrel below the automatically controlled water discharge valve, the little cavity of reactor body is the liquid phase aeration zone, loculus body back taper cavity is the sludge settling district, loculus body back taper cavity bottom is provided with automatically controlled mud valve, automatically controlled mud valve links to each other with the 3rd time controller, is provided with the mud gathering barrel below the automatically controlled mud valve; At loculus body different heights second sampling tube is housed, aeration pump is linked to each other with the threeway escape valve by a flexible pipe, the threeway escape valve another the outlet by aeration tube in glass rotameter stretches into little cavity, and be close to little cavity inner wall extend the bottom link to each other with the multi-hole type gas diffusion plate; Aeration pump links to each other with very first time controller, and the support next door is provided with a percolate bucket, and in second peristaltic pump put in little cavity, second peristaltic pump connected second time controller to the percolate bucket by water inlet pipe.
The rectangular parallelepiped of the big cavity of described reactor body is of a size of long 60～70cm * wide 30～40cm * high 100～110cm.The rectangular parallelepiped of the little cavity of reactor body is of a size of 60cm * wide 10～20cm * high 100cm.Mixed fillers is mixed by cinder, zeolite and gac, and the mixed fillers particle diameter is 0.5～1.0cm, and the mass ratio of cinder, zeolite and gac is 2～2.5: 2～2.5: 1.Mixed fillers in the big cavity of reactor body is to be filled to apart from top 15～20cm from the bottom.The first sampling tube level is inserted packing layer, and the first sampling tube depth of penetration is 3/4 to 4/5 of a packing layer, and the sampling tube tube wall is provided with equally distributed a plurality of aperture.
The present invention aims to provide a kind of percolate treatment reactor.Adopt " two-phase three districts " design philosophy,, in reactor, form " liquid phase aeration zone-many fillers aerobic zone-many filler anaerobics district " promptly by process optimization.Utilize the internal recycle stream between liquid phase aeration zone and the many fillers aerobic zone, give full play to the combined action of active sludge degraded-multiple filling adsorption, realize the removal of percolate high-enriched organics and ammonia nitrogen.The current of liquid phase aeration zone and filler aerobic zone can import the filler anaerobic district simultaneously, for anaerobic zone provides organism and nitric nitrogen, realize denitrification denitrogenation, avoid the classical inverse nitrifying process need add the problem of organic carbon source.The reactor operation process is flexible, easy and simple to handle, and can realize automatization control.
The present invention adopts " two-phase three districts " design philosophy, promptly by process optimization, forms in reactor " liquid phase aeration zone-many fillers aerobic zone-many filler anaerobics district ".Utilize the internal recycle stream between liquid phase aeration zone and the many fillers aerobic zone, give full play to the combined action of active sludge degraded-multiple filling adsorption, realize the removal of percolate high-enriched organics and ammonia nitrogen.The current of liquid phase aeration zone and filler aerobic zone can import the filler anaerobic district simultaneously, for anaerobic zone provides organism and nitric nitrogen, realize denitrification denitrogenation, avoid the classical inverse nitrifying process need add the problem of organic carbon source.The reactor operation process is flexible, easy and simple to handle, and can realize automatization control.
Description of drawings
Fig. 1 is an aeration inner circulation type garbage infiltration liquid two-phase treatment reactor structural representation; Among the figure: automatically controlled plate 1, very first time controller 2, second time controller 3, the 3rd time controller 4, the 4th time controller 5, the 5th time controller 6, aeration pump 7, threeway escape valve 8, glass rotameter 9, aeration tube 10, water inlet pipe 11, second peristaltic pump 12, support 13, percolate bucket 14, catheter 15, second sampling tube 16, liquid phase aeration zone 17, communicating aperture 18, multi-hole type gas diffusion plate 19, sludge settling district 20, automatically controlled mud valve 21, mud gathering barrel 22, first peristaltic pump 23, water distributor 24, grit layer 25, water distribution board 26, filler aerobic zone 27, first sampling tube 28, filler anaerobic district 29, automatically controlled water discharge valve 30, water outlet gathering barrel 31;
Fig. 2 is an aeration inner circulation type garbage infiltration liquid two-phase processing flow chart.
Embodiment
As shown in Figure 1, the aeration inner circulation type garbage infiltration liquid two-phase treatment reactor has support 13, support 13 is provided with reactor body, by a vertical clapboard reactor body body is divided into two cavitys that differ in size in the middle of the reactor body, 30cm to 35cm zone, vertical clapboard bottom is provided with equally distributed multirow communicating aperture 18, reactor body big, little cavity bottom is the back taper cavity, in the big cavity of reactor body mixed fillers is housed, filler top is gravel bed 25, be provided with the water distribution board 26 of horizontal positioned in the middle of the gravel bed, be provided with water distributor 24 above the water distribution board, water distributor is through first peristaltic pump 23, catheter is close to 15 and is close in the little cavity that reaches reactor body, first peristaltic pump is close to 23 and is close to and is close to 5 with the 4th time controller and is close to and links to each other, the big cavity different heights of reactor body is provided with a plurality of first sampling tubes and is close to 28 and is close to, the back taper cavity bottom of big cavity is provided with automatically controlled water discharge valve and is close to 30 and is close to, automatically controlled water discharge valve is close to 30 and is close to and is close to 6 with the 5th time controller and is close to and links to each other, automatically controlled water discharge valve is close to 30 and is provided with the water outlet gathering barrel below being close to and is close to 31 and is close to, the little cavity of reactor body is close to 17 for the liquid phase aeration zone and is close to, loculus body back taper cavity is close to 20 for the sludge settling district and is close to, loculus body back taper cavity bottom is provided with automatically controlled mud valve and is close to 21 and is close to, automatically controlled mud valve is close to 21 and is close to and is close to 4 with the 3rd time controller and is close to and links to each other, and automatically controlled mud valve is close to 21 and is provided with the mud gathering barrel below being close to and is close to 22 and is close to; At loculus body different heights second sampling tube being housed is close to 16 and is close to, aeration pump is close to 7 and is close to and is close to 8 by a flexible pipe and threeway escape valve and is close to and links to each other, another outlet of threeway escape valve is close to 10 by aeration tube and is close to and is close to 9 through glass rotameter and is close to and stretches in the little cavity, and is close to little cavity inner wall and extends bottom and multi-hole type gas diffusion plate and be close to 19 and be close to and link to each other; Aeration pump is close to 7 and is close to and is close to 2 with very first time controller and is close to and links to each other, support next door is provided with a percolate bucket and is close to 14 and is close to, the percolate bucket is close to 11 by water inlet pipe and is close to and is close to 12 through second peristaltic pump and is close to and puts in the little cavity, and second peristaltic pump connects second time controller and is close to 3 and is close to.
The rectangular parallelepiped of the big cavity of described reactor body is of a size of long 60～70cm * wide 30～40cm * high 100～110cm.The rectangular parallelepiped of the little cavity of reactor body is of a size of 60cm * wide 10～20cm * high 100cm.Mixed fillers is mixed by cinder, zeolite and gac, and the mixed fillers particle diameter is 0.5～1.0cm, and the mass ratio of cinder, zeolite and gac is 2～2.5: 2～2.5: 1.Mixed fillers in the big cavity of reactor body is to be filled to apart from top 15～20cm from the bottom.First sampling tube is close to 28 and is close to level and inserts packing layer, and first sampling tube is close to 28, and to be close to depth of penetration be 3/4 to 4/5 of packing layer, and the sampling tube tube wall is provided with equally distributed a plurality of aperture.
As shown in Figure 2, operation scheme can adopt intermittent type or continous way, specifically can realize by time controller.After system operational parameters is determined, regulate the micro computer time controller realize intaking automatically, from pneumatic aeration and operations such as sludge settling, automated cycle, automatic draining and automatic mud removing.
(1) reactor function: in the liquid phase aeration zone, pollutents such as the organism in the percolate, ammonia nitrogen are decomposed into carbonic acid gas, water, nitrate etc. by the biological degradation and the biotransformation of active sludge microorganism.Why the filler aerobic zone is aerobic zone, is that along with the circulation of circulation fluid between the solid-liquid two-phase, the part active sludge will be brought into the solid phase packing area because the circulation fluid of liquid phase aeration zone has been in oxygen condition, and attached to filling surface, forms microbial film.At the filler aerobic zone, porous cinder, zeolite and gac have very strong adsorption, and can realize having complementary advantages, and pollutents such as ammonia nitrogen can be adsorbed in the middle of particle surface or the micropore, further reduce the pollutant load in the circulation fluid; By the pollutent of filling adsorption, under biomembranous effect, obtain degraded and further nitrated.In the regular drainage procedure in filler anaerobic district, the sewage of upper strata aerobic zone and liquid phase aeration zone can enter the filler anaerobic district simultaneously.Therefore, in the middle of the sewage in filler anaerobic district, both comprised coming the nitrate of self filler aerobic zone, comprise partial organic substances (its load can be controlled) again from the liquid phase aeration zone, the existence of partial organic substances can provide carbon source for denitrifying bacteria, realize not having the denitrification denitrogenation process that manually adds carbon source, have the effect of Prepositive denitrification technology.
(2) startup of reactor and debugging: reach the percolate ammonia nitrogen and efficiently remove and save energy consumption, each link and reaction zone will be brought into play best-of-breed functionality and reach optimum combination, whole reactor needs a cover optimal operating parameter, comprise flooding quantity, influent quality, aeration rate, aeration time, filler aerobic zone hydraulic detention time, liquid phase aeration zone mud state and the residence time, filler aerobic zone hydraulic retention Shi Wen etc., these parameters are determining the performance of reactor, need through debugging and field experiment operating parameter to be optimized selection.For shortening the activated sludge acclimatization time, can directly get the mud of percolate treatment plant and debug; Default earlier each operating parameter is opened total system, each thief hatch sampling carrying out water quality and sludge quality analysis from reactor, adjust operating parameter again according to operating performance,, can obtain the best system operational parameters of a cover up to obtaining best operating performance and reaching the saving energy consumption.
(3) operating parameter setting: on the basis of findding out the reactor operating parameter, can realize automatic operating.Check circuit, pipeline, gas circuit, gas meter, reaction vessel, electrical equipment of a whole set of reactor assembly etc.According to hydraulic load and the pollutant load parameter that reactor can bear, set the second peristaltic pump flow, set second time controller work and the stand-by time again.Regulate glass rotameter and set flow, the threeway escape valve is to be the protection aeration pump, avoids its excessive heat production and is provided with, and sets very first time controller work and stand-by time again.Regulate first peristaltic pump and set flow, setting the 4th time controller work and stand-by time.Set the 3rd time controller work and stand-by time, to determine the open and close time of automatically controlled mud valve.Set the 5th time controller work and stand-by time, to determine the open and close time of automatically controlled water discharge valve.
(4) system's operation: after having set every operating parameter, in the percolate bucket, inject pending percolate; Open the master control power supply, make to enter each time controller and enter automatic control state, make the second peristaltic pump intermittent type or continous way work, amount ground is delivered to the liquid phase aeration zone with pending percolate through water inlet pipe termly.Aeration pump regularly blasts air the liquid phase aeration zone quantitatively through glass rotameter, aeration tube and multi-hole type gas diffusion plate.First peristaltic pump realizes that through catheter, water distributor, water distribution board, grit layer and communicating aperture percolate regularly circulates quantitatively between liquid phase aeration zone and filler aerobic zone.When aeration pump quit work, the active sludge in the liquid phase aeration zone began sedimentation, and automatically controlled mud valve combines with the sludge settling process, regularly quantitatively the part mud in the sludge settling district was entered the mud gathering barrel.Automatically controlled water discharge valve can regularly enter the water outlet gathering barrel with the treating water in the filler anaerobic district quantitatively.
Claims (6)
1. aeration inner circulation type garbage infiltration liquid two-phase treatment reactor, it is characterized in that, it has support (13), support (13) is provided with reactor body, by a vertical clapboard reactor body body is divided into two cavitys that differ in size in the middle of the reactor body, 30cm to 35cm zone, vertical clapboard bottom is provided with equally distributed multirow communicating aperture (18), reactor body big, little cavity bottom is the back taper cavity, in the big cavity of reactor body mixed fillers is housed, filler top is gravel bed (25), be provided with the water distribution board (26) of horizontal positioned in the middle of the gravel bed, be provided with water distributor (24) above the water distribution board, water distributor is through first peristaltic pump (23), catheter (15) reaches in the little cavity of reactor body, first peristaltic pump (23) links to each other with the 4th time controller (5), the big cavity different heights of reactor body is provided with a plurality of first sampling tubes (28), the back taper cavity bottom of big cavity is provided with automatically controlled water discharge valve (30), automatically controlled water discharge valve (30) links to each other with the 5th time controller (6), be provided with water outlet gathering barrel (31) below the automatically controlled water discharge valve (30), the little cavity of reactor body is liquid phase aeration zone (17), loculus body back taper cavity is sludge settling district (20), loculus body back taper cavity bottom is provided with automatically controlled mud valve (21), automatically controlled mud valve (21) links to each other with the 3rd time controller (4), is provided with mud gathering barrel (22) below the automatically controlled mud valve (21); At loculus body different heights second sampling tube (16) is housed, aeration pump (7) is linked to each other with threeway escape valve (8) by a flexible pipe, another outlet of threeway escape valve is stretched in the little cavity through glass rotameter (9) by aeration tube (10), and be close to little cavity inner wall extend the bottom link to each other with multi-hole type gas diffusion plate (19); Aeration pump (7) links to each other with very first time controller (2), and the support next door is provided with a percolate bucket (14), and the percolate bucket is put in the little cavity through second peristaltic pump (12) by water inlet pipe (11), and second peristaltic pump connects second time controller (3).
2. a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor according to claim 1 is characterized in that, the rectangular parallelepiped of the big cavity of described reactor body is of a size of long 60～70cm * wide 30～40cm * high 100～110cm.
3. a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor according to claim 1 is characterized in that the rectangular parallelepiped of the little cavity of described reactor body is of a size of 60cm * wide 10～20cm * high 100cm.
4. a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor according to claim 1, it is characterized in that, described mixed fillers is mixed by cinder, zeolite and gac, the mixed fillers particle diameter is 0.5～1.0cm, and the mass ratio of cinder, zeolite and gac is 2～2.5: 2～2.5: 1.
5. a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor according to claim 1 is characterized in that the mixed fillers in the big cavity of described reactor body is to be filled to apart from top 15～20cm from the bottom.
6. a kind of aeration inner circulation type garbage infiltration liquid two-phase treatment reactor according to claim 1, it is characterized in that, described first sampling tube (28) level is inserted packing layer, first sampling tube (28) depth of penetration is 3/4 to 4/5 of a packing layer, and the sampling tube tube wall is provided with equally distributed a plurality of aperture.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343133B (en) * | 2008-08-26 | 2010-06-02 | 浙江林学院 | Comprehensive treatment method for wastewater of livestock and poultry cultivation |
| CN102849841A (en) * | 2011-06-28 | 2013-01-02 | 天津万联管道工程有限公司 | Prefabricated reaction tank for biological contact oxidation for sewage pretreatment |
| CN103466796A (en) * | 2013-09-27 | 2013-12-25 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
| CN104163498A (en) * | 2014-07-08 | 2014-11-26 | 浙江大学 | Partitioned methane oxidation-denitrification reactor and method thereof |
| CN106610348A (en) * | 2016-10-13 | 2017-05-03 | 中核第四研究设计工程有限公司 | Fully automatic liquid sampling device and use method thereof |
| CN111003806A (en) * | 2019-12-23 | 2020-04-14 | 河南建卓环保科技有限公司 | Novel AAO technology integration equipment |
| CN112408705A (en) * | 2020-11-12 | 2021-02-26 | 江西挺进环保科技有限公司 | Domestic sewage treatment system with tidal flow percolation system and treatment process |
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| CN2543952Y (en) * | 2001-05-08 | 2003-04-09 | 王崇达 | Filling type inner circulation biological reactor |
| CN2725288Y (en) * | 2004-09-20 | 2005-09-14 | 中国石油天然气股份有限公司 | Anaerobic aerobic integrated fixed bed biological membrane reactor |
| CA2481853C (en) * | 2004-10-12 | 2013-10-01 | Laleh Yerushalmi | Integrated multi-zone wastewater treatment system and method |
| CN1887741A (en) * | 2006-07-28 | 2007-01-03 | 于容朴 | Airlift inner circulation sewage treating process and apparatus |
| CN201010581Y (en) * | 2007-03-26 | 2008-01-23 | 浙江大学 | Aerating inner loop type garbage leachate diphasic treating effector |
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- 2007-03-26 CN CNB2007100677892A patent/CN100455526C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343133B (en) * | 2008-08-26 | 2010-06-02 | 浙江林学院 | Comprehensive treatment method for wastewater of livestock and poultry cultivation |
| CN102849841A (en) * | 2011-06-28 | 2013-01-02 | 天津万联管道工程有限公司 | Prefabricated reaction tank for biological contact oxidation for sewage pretreatment |
| CN102849841B (en) * | 2011-06-28 | 2014-09-17 | 天津万联管道工程有限公司 | Prefabricated reaction tank for biological contact oxidation for sewage pretreatment |
| CN103466796A (en) * | 2013-09-27 | 2013-12-25 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
| CN103466796B (en) * | 2013-09-27 | 2015-01-21 | 桂林理工大学 | Method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using mineralized refuse reaction bed |
| CN104163498A (en) * | 2014-07-08 | 2014-11-26 | 浙江大学 | Partitioned methane oxidation-denitrification reactor and method thereof |
| CN106610348A (en) * | 2016-10-13 | 2017-05-03 | 中核第四研究设计工程有限公司 | Fully automatic liquid sampling device and use method thereof |
| CN106610348B (en) * | 2016-10-13 | 2023-10-20 | 中核第四研究设计工程有限公司 | Full-automatic liquid sampling device and application method thereof |
| CN111003806A (en) * | 2019-12-23 | 2020-04-14 | 河南建卓环保科技有限公司 | Novel AAO technology integration equipment |
| CN112408705A (en) * | 2020-11-12 | 2021-02-26 | 江西挺进环保科技有限公司 | Domestic sewage treatment system with tidal flow percolation system and treatment process |
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| CN100455526C (en) | 2009-01-28 |
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