CN101985384A - Method for treating sewage by utilizing grid aeration tank - Google Patents
Method for treating sewage by utilizing grid aeration tank Download PDFInfo
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- CN101985384A CN101985384A CN201010566547XA CN201010566547A CN101985384A CN 101985384 A CN101985384 A CN 101985384A CN 201010566547X A CN201010566547X A CN 201010566547XA CN 201010566547 A CN201010566547 A CN 201010566547A CN 101985384 A CN101985384 A CN 101985384A
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- graticule mesh
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a method for treating sewage by utilizing a grid aeration tank, and relates to a method for the purification treatment of sewage, which aims to solve the problems of low utilization rate of activated sludge on dissolved oxygen and high energy consumption of aeration during running due to lack of grid aeration in sewage treatment by the conventional plug flow activated sludge method. The method comprises the following steps of: 1, allowing sewage to flow in, wherein the flow rate that the sewage flows through holes is 0.1 m/s; 2, performing aeration, namely allowing the sewage to flow through a multi-layer grid arranged in a vortex biochemical pond vertically to form horizontal flow, wherein the retention time of the sewage in the vortex biochemical pond is 2 hours, and air amount blasted from an aerator is in an amount which is 4 times treated water volume; 3, performing the flocculation process for 6 minutes by taking zoogloea as a flocculating agent and the multi-layer grid arranged horizontally as flocculation equipment, wherein the flow rate that mixed solution flows in the multi-layer grid is 0.08 m/s; 4, performing secondary flocculation process for 9 minutes; and 5, separating mud from water, and precipitating for 1.2 hours. The method is used for the sewage treatment.
Description
Technical field
The present invention relates to a kind of method for cleaning treatment of sewage.
Background technology
At present large-scale sewage treatment project adopts the pulling flow type aerobic activated sludge process more, as A/O, A/A/O etc.The flow process of pulling flow type can increase organic degradation time in the sewage, and can form a longshore current journey direction by rudimentary to the high-grade microbial ecosystem, help improving organic clearance.But the flow process of pulling flow type also has many unfavorable, as: the short flow phenomenon of current easily taking place, reduced the utilization ratio of pond body, causes and take up an area of waste; Streamflow regime in the plug-flow aeration tank is a laminar flow regime substantially, and Reynolds number is less, current to the stirring of air-flow, organism and active sludge in the water body, mixing effect a little less than, can not fast above three-phase material be distributed on the whole transverse section equably well; The yardstick of active sludge flco is big in the common aeration tank, specific surface area is less, and the ability of its absorption organic substrates and oxygen is relatively poor, causes the utilization ratio of dissolved oxygen not high.These also cause the major cause that the common plug-flow aeration tank residence time is long, occupation of land is bigger just.
Micro porous aeration head commonly used has at present reduced the diameter of incipient bubble significantly, can reach about 3mm, the specific surface area of bubble increases greatly, its oxygen transfer rate can reach 30%, contained oxygen still has 70% not to be dissolved in the sewage in the air that promptly blasts, and rises to the water surface, overflows with bubble.As seen, the oxygen transfer rate of micro-pore aeration is still lower, and major cause is as follows: (1), oxygen are not soluble in water, and its saturation solubility is very little, are generally every liter several milligrams, this factor can not the people for a change; (2), do not establish filler in the main reaction region of conventional aeration tank, can not stop bubble quick merging, grow up, the suffered buoyancy of the bubble after growing up is bigger, very easily floats to the water surface and overflows and loose in atmosphere; The merging of bubble causes its specific surface area to reduce rapidly, has also just reduced the contact area of oxygen and active sludge, water body, has reduced the rate of transform of oxygen; (3) even in the plug-flow aeration tank of filler is set, set filler mostly is light suspended filler, and light filler is floated with the mixed liquid of Chi Zhongqi, water, mud, and is very faint to the cutting action of bubble, the merging that can not suppress the gas bubble with grow up.If can not rationally control freely merging of bubble, will cause a large amount of wastes that blast air.In general, the required electricity charge of aeration are chief components that entire sewage is handled working cost in the good oxidisability mud method.
Summary of the invention
The objective of the invention is to dispose of sewage and do not utilize the graticule mesh aeration in order to solve existing plug-flow type active sludge method, make active sludge low to the utilization ratio of dissolved oxygen, the high problem of aeration energy consumption during operation provides a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage.
Method of the present invention realizes by following steps: step 1, put into sewage: sewage flows into distribution reservoir by water inlet pipe, flows into equably through the distributing hole on the distribution reservoir on the transverse section of eddy current biochemistry pool, and the via hole flow velocity is 0.08m/s～0.12m/s; Step 2, aeration process: the sewage vertical multilayer graticule mesh of placing in the eddy current biochemistry pool of under the impellent of follow-up current and mass force effect, flowing through successively, form horizontal flow, at this moment the active sludge in the eddy current biochemistry pool is in suspended state, the residence time of sewage in the eddy current biochemistry pool is 1.5h～4.0h, the air that is diffused out by aeration head then rises to water surface gradually by the bottom, the air capacity that blasts is 3 times～6 times of the processing water yield, make sewage become gas, water, mud mixes liquid, mixed liquid is after process multilayer graticule mesh, the mixed contained majority of organic pollutants of liquid is degraded by active sludge, and making mixed liquid contain a large amount of suspended sludges is zoogloea; Step 3, main flocculation process: mixed liquid enters in the eddy current flocculation basin, with zoogloea from being that flocculation apparatus is finished flocculation process as flocculation agent, with the multilayer graticule mesh of horizontal positioned, the flow velocity that mixed liquid flows into the multilayer graticule mesh is 0.06m/s～0.12m/s, this flocculation process is to impel to be difficult for sedimentary molecule in the mixed solution and the colloid particle forms small and dense real floc particle, and flocculation time is 5min～8min; Step 4, inferior flocculation process: the mixed solution after the step 3 enters time flocculation basin, and from continuing to finish flocculation process as flocculation agent, flocculation time is 8min～10min, forms big and closely knit sunk particle with zoogloea; Step 5, mud-water separation: the mixed solution that contains the mud flocs unit climbs over effluent weir and enters into settling tank through pipe connecting and precipitate, sedimentation time is 1h～1.5h, big and closely knit particle sinks to the settling tank bottom, and the clear liquid after the clarification is discharged by rising pipe, and sewage disposal is finished.
The present invention compared with prior art has following beneficial effect: one, the present invention utilizes the multilayer graticule mesh in eddy current biochemistry pool and the eddy current flocculation basin repeatedly to cut the mixed liquid of three-phase that the oxygen in the sewage, the water body that contains organic pollutant and active sludge are formed, make the mud of suspension be in the high reactivity state by cutting action, the specific surface area and the rate of mass transfer of bubble and active sludge have been increased, and make mud have higher activity, improved oxygen transfer rate, coefficient of oxygen utilization and volumetric loading, thus can save aeration consumption.Two, make mixed liquid form activated sludge particles by eddy current flocculation basin and inferior flocculation basin, utilize activated sludge particles severe big, be easy to sedimentary characteristics it is precipitated in settling tank, thereby reduced the possibility that mud expands.Three, therefore the common plug-flow aeration tank volume-diminished of the eddy current biochemistry pool volume ratio 20%-30% among the present invention, has reduced occupation of land, has saved initial cost, and sewage work is brought bigger economic benefit.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment realizes by following steps: step 1, put into sewage: sewage flows into distribution reservoir 4 by water inlet pipe 1, flow into equably through the distributing hole on the distribution reservoir 43 on the transverse section of eddy current biochemistry pool 6, the via hole flow velocity is 0.08m/s～0.12m/s; Step 2, aeration process: the sewage vertical multilayer graticule mesh 7 of placing in the eddy current biochemistry pool 6 of under the impellent of follow-up current and mass force effect, flowing through successively, form horizontal flow, at this moment the active sludge in the eddy current biochemistry pool 6 is in suspended state, the residence time of sewage in eddy current biochemistry pool 6 is 1.5h～4.0h, the air that is diffused out by aeration head 9 then rises to water surface gradually by the bottom, the air capacity that blasts is 3 times～6 times of the processing water yield, make sewage become gas, water, mud mixes liquid, mixed liquid is after process multilayer graticule mesh 7, the mixed contained majority of organic pollutants of liquid is degraded by active sludge, and making mixed liquid contain a large amount of suspended sludges is zoogloea; Step 3, main flocculation process: mixed liquid enters in the eddy current flocculation basin 10, with zoogloea from being that flocculation apparatus is finished flocculation process as flocculation agent, with the multilayer graticule mesh 7 of horizontal positioned, the flow velocity that mixed liquid flows into multilayer graticule mesh 7 is 0.06m/s～0.12m/s, this flocculation process is to impel to be difficult for sedimentary molecule in the mixed solution and the colloid particle forms small and dense real floc particle, be easy to precipitate in heavy pond, pond, flocculation time is 5min～8min; Step 4, inferior flocculation process: the mixed solution after the step 3 enters time flocculation basin 12, and from continuing to finish flocculation process as flocculation agent, flocculation time is 8min～10min, forms big and closely knit sunk particle with zoogloea; Step 5, mud-water separation: the mixed solution that contains the mud flocs unit climbs over effluent weir 13 and enters into settling tank 15 precipitations through pipe connecting 14, sedimentation time is 1h～1.5h, big and closely knit particle sinks to settling tank 15 bottoms, and the clear liquid after the clarification is discharged by rising pipe 16, and sewage disposal is finished.After the mud-water separation, part mud is back to distribution reservoir 4 by reflux pump 18 and return line 19, reflux ratio is 50%～100%, and guaranteeing having certain density living microorganism in the eddy current biochemistry pool 6, rest part mud then is disposed to follow-up sludge treatment workshop section as excess sludge by sludge pipe 17.Distribution reservoir 4, eddy current biochemistry pool 6, eddy current flocculation basin 10, inferior flocculation basin 12 and settling tank 15 pond bodies are made by Steel Concrete.On the pool wall between distribution reservoir 4 and the eddy current biochemistry pool 6, offer distributing hole 3, be used for the uniformly distributing incoming flow.Aeration head 9 is laid in the bottom of eddy current biochemistry pool 6, and aeration head 9 is installed on the inlet pipe 2, and aeration head 9 is ABS or PVC material, and 2 predetermined fixed of inlet pipe are at the bottom of the pond.Effluent weir 13 is used for evenly collecting the sewage mixed solution.
When aeration head 9 is worked in the step 2, because gas is proposed effect, can make current up-flow from bottom to top, form vertically stream, horizontal flow is when flowing through graticule mesh 7, because its flow velocity that reduces of section increases suddenly, suddenly reduce and flow through graticule mesh 7 its flow velocitys of back just, this current difference can produce numerous vortexs of inducing in water body, induce vortex in water body, constantly to cross and form more, littler vortex, thereby in the body of whole pond, form countless micro swirls, suspension active sludge (zoogloea) in the eddy current biochemistry pool 6, the suspension bubble, dissolved oxygen and organic pollutant are at vertical stream, under the acting in conjunction of horizontal flow and three kinds of current of micro swirl, be in and highly suspend and admixture, and be evenly distributed on the transverse section of eddy current biochemistry pool 6, avoid the short flow phenomenon that is prone in the common plug-flow pond, improved the space availability ratio of pond body.
Be connected to form an integral body by union lever 8 between the multilayer graticule mesh 7 in step 2 and the step 3, and be installed on the support 5.Graticule mesh 7 has the stronger whirlpool ability of making, can function as follows: (1), small vortex in the water has stronger centrifugal intertia force, entrained oxygen in the vortex, contain the water body of organic pollutant and the three-phase material particulate that active sludge is formed, as the active sludge flco, dissolved oxygens etc. can radially move under action of centrifugal force, also can under the effect of mass force, tangentially move, the countless small vortex that exists in the water has promoted the disordered motion of tiny particle in water, thereby increased the touch opportunity of three-phase material, promoted the three-phase mass transfer, improve the rate of transform of oxygen, saved aeration rate; (2), graticule mesh 7 can play the effect of cutting air pocket and bulk mud flco, staggered multilayer eyelet can constantly cut bubble on flow process, avoid the too fast merging of bubble, grow up and the bubble concentration of local, thereby make the bubble that is diffused in the water body have bigger specific surface area, help the mass transfer between dissolved oxygen and the active sludge, according to the concentration gradient theory as can be known, also just improved the utilization ratio of oxygen; (3), the equally continuous nicking activity mud of graticule mesh 7, its surface is brought in constant renewal in, and is kept enough big specific surface area, and have the effect of physical adsorption dissolved oxygen microbubble, help active sludge and obtain sufficient oxygen and carry out metabolism.
Embodiment two: present embodiment is described in conjunction with Fig. 1, in the multilayer graticule mesh 7 of vertically placing in the step 2 of present embodiment, spacing between adjacent two graticule mesh 7 is 0.5m～1.0m, the eyelet of every graticule mesh 7 is shaped as circle, regular polygon or rectangle, and the eyelet inscribed circle diameter of every graticule mesh 7 is controlled at 0.045m～0.065m.Mixed liquid can carry out in this interval laterally, vertically mix, and helps dissolved oxygen, organic substrates and active sludge redistributing on body transverse section, whole pond, avoids occurring the aeration dead band, has improved the utilization ratio of aeration head.Other step is identical with embodiment one.
Embodiment three: present embodiment is described in conjunction with Fig. 1, in the step 3 of present embodiment in the multilayer graticule mesh 7 of horizontal positioned, spacing between adjacent two graticule mesh 7 is 0.4m～0.6m, the eyelet of every graticule mesh 7 is shaped as circle, regular polygon or rectangle, and the eyelet inscribed circle diameter of every graticule mesh 7 is controlled at 0.045m～0.065m.Mixed liquid can flocculate in this interval, helps dissolved oxygen, organic substrates and active sludge.Other step is identical with embodiment one.
Embodiment four: in conjunction with Fig. 1 present embodiment is described, place, the base angle of eddy current flocculation basin 10 is provided with water conservancy diversion slope 11 in the step 3 of present embodiment.But water conservancy diversion slope 11 second pouring concrete or brick, water conservancy diversion slope 11 is for preventing to form the mud dead angle.Other step is identical with embodiment one.
Embodiment five: in conjunction with Fig. 1 present embodiment is described, place, the base angle of time flocculation basin 12 is provided with water conservancy diversion slope 11 in the step 4 of present embodiment.But water conservancy diversion slope 11 second pouring concrete or brick, water conservancy diversion slope 11 is for preventing to form the mud dead angle.Other step is identical with embodiment one.
Embodiment six: sewage via hole flow velocity is 0.1m/s in the step 1 of present embodiment.The via hole flow velocity of this numerical value can make the sewage in the distribution reservoir 4 flow into uniformly in the eddy current biochemistry pool 6, and is even to guarantee follow-up aeration.Other step is identical with embodiment one.
Embodiment seven: the residence time of sewage in eddy current biochemistry pool 6 is 2.0h in the step 2 of present embodiment, and the air capacity that aeration blasts is 4 times of the processing water yield.Above-mentioned numerical value makes that sewage aeration in eddy current biochemistry pool 6 is abundant, and sewage forms flco easily.Other step is identical with embodiment one.
Embodiment eight: the flow velocity that mixed liquid flows into multilayer graticule mesh 7 in the step 3 of present embodiment is 0.08m/s, and flocculation time is 6min.Above-mentioned numerical value can guarantee that mixed solution forms small and dense real floc particle.Other step is identical with embodiment one.
Embodiment nine: time flocculation time is 9min in the step 4 of present embodiment.This flocculation time is enough to guarantee that mixed solution forms big and closely knit sunk particle.Other step is identical with embodiment one.
Embodiment ten: the sedimentation time of mixed solution in settling tank 15 that contains the mud flocs unit in the step 5 of present embodiment is 1.2h.This sedimentation time can guarantee the more thorough of mud-water separation.Other step is identical with embodiment one.
Claims (10)
1. method of utilizing the graticule mesh aeration tank to dispose of sewage, it is characterized in that: described method realizes by following steps: step 1, put into sewage: sewage flows into distribution reservoir (4) by water inlet pipe (1), distributing hole (3) on distribution reservoir (4) flows on the transverse section of eddy current biochemistry pool (6) equably, and the via hole flow velocity is 0.08m/s～0.12m/s; Step 2, aeration process: the sewage vertical multilayer graticule mesh (7) of placing in the eddy current biochemistry pool (6) of under the impellent of follow-up current and mass force effect, flowing through successively, form horizontal flow, at this moment the active sludge in the eddy current biochemistry pool (6) is in suspended state, the residence time of sewage in eddy current biochemistry pool (6) is 1.5h～4.0h, the air that is diffused out by aeration head (9) then rises to water surface gradually by the bottom, the air capacity that blasts is 3 times～6 times of the processing water yield, make sewage become gas, water, mud mixes liquid, mixed liquid is after process multilayer graticule mesh (7), the mixed contained majority of organic pollutants of liquid is degraded by active sludge, and making mixed liquid contain a large amount of suspended sludges is zoogloea; Step 3, main flocculation process: mixed liquid enters in the eddy current flocculation basin (10), with zoogloea from being that flocculation apparatus is finished flocculation process as flocculation agent, with the multilayer graticule mesh (7) of horizontal positioned, the flow velocity that mixed liquid flows into multilayer graticule mesh (7) is 0.06m/s～0.12m/s, this flocculation process is to impel to be difficult for sedimentary molecule in the mixed solution and the colloid particle forms small and dense real floc particle, and flocculation time is 5min～8min; Step 4, inferior flocculation process: the mixed solution after the step 3 enters time flocculation basin (12), and from continuing to finish flocculation process as flocculation agent, flocculation time is 8min～10min, forms big and closely knit sunk particle with zoogloea; Step 5, mud-water separation: the mixed solution that contains the mud flocs unit climbs over effluent weir (13) and enters into settling tank (15) precipitation through pipe connecting (14), sedimentation time is 1h～1.5h, big and closely knit particle sinks to settling tank (15) bottom, clear liquid after the clarification is discharged by rising pipe (16), and sewage disposal is finished.
2. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: in the multilayer graticule mesh (7) of vertically placing in the described step 2, spacing between adjacent two graticule mesh (7) is 0.5m～1.0m, the eyelet of every graticule mesh (7) is shaped as circle, regular polygon or rectangle, and the eyelet inscribed circle diameter of every graticule mesh (7) is controlled at 0.045m～0.065m.
3. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: in the described step 3 in the multilayer graticule mesh (7) of horizontal positioned, spacing between adjacent two graticule mesh (7) is 0.4m～0.6m, the eyelet of every graticule mesh (7) is shaped as circle, regular polygon or rectangle, and the eyelet inscribed circle diameter of every graticule mesh (7) is controlled at 0.045m～0.065m.
4. according to claim 1 or 3 described a kind of methods of utilizing the graticule mesh aeration tank to dispose of sewage, it is characterized in that: place, the base angle of eddy current flocculation basin (10) is provided with water conservancy diversion slope (11) in the described step 3.
5. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: place, the base angle of time flocculation basin (12) is provided with water conservancy diversion slope (11) in the described step 4.
6. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: sewage via hole flow velocity is 0.1m/s in the described step 1.
7. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: the residence time of sewage in eddy current biochemistry pool (6) is 2.0h in the described step 2, and the air capacity that aeration blasts is 4 times of the processing water yield.
8. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: the flow velocity that mixed liquid flows into multilayer graticule mesh (7) in the described step 3 is 0.08m/s, and flocculation time is 6min.
9. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: time flocculation time is 9min in the described step 4.
10. according to the described a kind of method of utilizing the graticule mesh aeration tank to dispose of sewage of claim 1, it is characterized in that: the sedimentation time of mixed solution in settling tank (15) that contains the mud flocs unit in the described step 5 is 1.2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010566547XA CN101985384A (en) | 2010-11-30 | 2010-11-30 | Method for treating sewage by utilizing grid aeration tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010566547XA CN101985384A (en) | 2010-11-30 | 2010-11-30 | Method for treating sewage by utilizing grid aeration tank |
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| CN101985384A true CN101985384A (en) | 2011-03-16 |
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| CN201010566547XA Pending CN101985384A (en) | 2010-11-30 | 2010-11-30 | Method for treating sewage by utilizing grid aeration tank |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674540A (en) * | 2012-05-21 | 2012-09-19 | 北京斯凯特达科技开发有限公司 | Bionic structural aeration device for wastewater biochemical treatment |
| CN108635955A (en) * | 2018-05-03 | 2018-10-12 | 桑博 | A kind of waste water multistage sieving settlement treatment method |
| CN108862966A (en) * | 2018-06-26 | 2018-11-23 | 杭州小橙工业设计有限公司 | A kind of excrement sludge treating system |
| CN112390474A (en) * | 2020-12-04 | 2021-02-23 | 烟台和盛康洁环保科技有限公司 | Integrated equipment and method for efficiently treating landfill leachate of refuse transfer station |
| CN112957934A (en) * | 2020-12-25 | 2021-06-15 | 广州易能克科技有限公司 | Bubble cutting device |
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| GB2152021A (en) * | 1983-11-11 | 1985-07-31 | Projekt Wasserwirtschaft Veb | Biological treatment of effluent |
| CN1167090A (en) * | 1996-05-31 | 1997-12-10 | 王绍文 | Vertical retained aeration sewage treatment process and device |
| CN2426875Y (en) * | 2000-05-18 | 2001-04-18 | 王绍文 | Folded plate uniform limited aeration type horizontal push flowing aeration tank |
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2010
- 2010-11-30 CN CN201010566547XA patent/CN101985384A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2152021A (en) * | 1983-11-11 | 1985-07-31 | Projekt Wasserwirtschaft Veb | Biological treatment of effluent |
| CN1167090A (en) * | 1996-05-31 | 1997-12-10 | 王绍文 | Vertical retained aeration sewage treatment process and device |
| CN2426875Y (en) * | 2000-05-18 | 2001-04-18 | 王绍文 | Folded plate uniform limited aeration type horizontal push flowing aeration tank |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674540A (en) * | 2012-05-21 | 2012-09-19 | 北京斯凯特达科技开发有限公司 | Bionic structural aeration device for wastewater biochemical treatment |
| CN102674540B (en) * | 2012-05-21 | 2013-09-25 | 北京斯凯特达科技开发有限公司 | Bionic structure aeration device for wastewater biochemical treatment |
| CN108635955A (en) * | 2018-05-03 | 2018-10-12 | 桑博 | A kind of waste water multistage sieving settlement treatment method |
| CN108635955B (en) * | 2018-05-03 | 2020-10-27 | 诸暨市天佑环保科技有限公司 | Multistage screening and sedimentation treatment method for wastewater |
| CN108862966A (en) * | 2018-06-26 | 2018-11-23 | 杭州小橙工业设计有限公司 | A kind of excrement sludge treating system |
| CN112390474A (en) * | 2020-12-04 | 2021-02-23 | 烟台和盛康洁环保科技有限公司 | Integrated equipment and method for efficiently treating landfill leachate of refuse transfer station |
| CN112957934A (en) * | 2020-12-25 | 2021-06-15 | 广州易能克科技有限公司 | Bubble cutting device |
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Open date: 20110316 |