CN102718372A - Roller shutter type recycle-ratio-adjustable oxidation ditch device and operation method thereof - Google Patents
Roller shutter type recycle-ratio-adjustable oxidation ditch device and operation method thereof Download PDFInfo
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- CN102718372A CN102718372A CN2012102452841A CN201210245284A CN102718372A CN 102718372 A CN102718372 A CN 102718372A CN 2012102452841 A CN2012102452841 A CN 2012102452841A CN 201210245284 A CN201210245284 A CN 201210245284A CN 102718372 A CN102718372 A CN 102718372A
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Abstract
The invention discloses a roller shutter type recycle-ratio-adjustable oxidation ditch device and an operation method thereof. The device comprises an anaerobic tank (2), an oxidation ditch tank (3) and a sedimentation tank (4), wherein a stirrer (9) is arranged in the anaerobic tank (2), the oxidation ditch tank (3) is divided into an aerobic zone and an anoxic zone, a roller shutter type recycle ratio adjustment devices (12) is arranged at the starting end of each of the aerobic zone and the anoxic zone respectively, a high-speed rotary brush (11) is arranged in the aerobic zone, and a low-speed rotary brush (10) is arranged in the anoxic zone. The roller shutter type recycle-ratio-adjustable oxidation ditch device has the advantages that decontamination effect of an oxidation ditch can be remarkably improved only by adjusting the recycle ratio without changing other running parameters and using chemical agents, and nitrogen and phosphorus removal can be achieved while the removal rate is high. Compared with other activated sludge processes capable of achieving the same processing effect, the roller shutter type recycle-ratio-adjustable oxidation ditch device can save oxygen consumption and power consumption.
Description
Technical field
The invention belongs to the technical field of sewage in the environmental engineering, relate to adjustable oxidation ditch device of a kind of rolling type recycle ratio and working method thereof.
Background technology
1954, first oxidation ditch sewage work set up in Holland in the world, gone through the development of decades.At present, in oxidation ditch process design specifications or the handbook all not with recycle ratio (circular flow that circulation gallery section passes through and the ratio of flooding velocity) as process design parameter.In the design process; Often select design parameter value such as sludge concentration, sludge loading, sludge age according to design specifications or handbook; Calculate the required volume of oxidation ditch afterwards,, confirm width of corridor, the degree of depth and length and the gallery number of oxidation ditch at last according to requirements such as places; It is widely different finally to have caused having built the oxidation ditch process recycle ratio, sees table 1.
Table 1 has been built the recycle ratio of oxidation ditch process
Annotate: Q
TOT=86400vBH=Q
In+ R
sQ
In+ RQ
InSo,
In the formula: Q
ToT--through the total flux of circulation gallery section, m
3/ d; Q
In--single seat oxidation ditch flooding velocity, m
3/ d
The R--recycle ratio; The B--gallery is wide, m; The H--available depth, m; A 86400-unit time second and a day transformation ratio.
R
S--return sludge ratio, estimate and get 1 (promptly 100%); V--mixed solution flow velocity is estimated and is got 0.3m/s.
Because recycle ratio is not taken into account as the design variable person of being designed in the oxidation ditch process design.In addition, after sewage work went into operation and moves, flooding velocity was not the parameter that managerial personnel can regulate and control, but is determined by extraneous circumstance.Built up oxidation ditch process system gallery wide (B) and available depth (H, be at the bottom of the oxidation ditch pond upper surface to the oxidation ditch pond distance of high design water level) be definite value.And the too small meeting of the flow velocity of mixed solution in ditch causes the sludge settling alluvial.The excessive one side of flow velocity can cause operation uneconomical; Active sludge flco particle diameter is diminished, and muddy water mixed solution gets into settling property variation behind the settling tank by the oxidation ditch pond like this, finally can make the effluent quality variation of oxidation ditch process system.So the mixed solution flow velocity often remains on about 0.3m/s in the oxidation ditch.The return sludge ratio of oxidation ditch process system (being back to the sludge quantity of reaction tank and the ratio of flooding velocity) empirical value (being 75%-150%) between 0.75-1.5 by settling tank; Numerical value is less, so the minor fluctuations of return sludge ratio Rs is to not very big influence of recycle ratio R.
In existing oxidation ditch process technology, has and in the circulation gallery, install plate additional, but the open area of plate is a fixed that therefore for such oxidation ditch process, its recycle ratio can not be regulated, and also is definite value with certain pore size.
To sum up can know; Have following problem in the existing oxidation ditch process technology: recycle ratio fails to become the technology operating parameter that can effectively regulate and control, has therefore caused not adding chemical agent and has only relied on the oxidation ditch process of active sludge microorganism Degradation to be difficult to make denitrogenation dephosphorizing to reach higher clearance simultaneously.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of rolling type recycle ratio adjustable oxidation ditch device.
Second purpose of the present invention provides the working method of the adjustable oxidation ditch device of a kind of rolling type recycle ratio.
Technical scheme of the present invention is summarized as follows:
The adjustable oxidation ditch device of a kind of rolling type recycle ratio, anaerobic pond 2 is connected with the feed-water end of oxidation ditch pond 3, settling tank 4, sludge reflux pump 5 through pipeline successively, and the water side of sludge reflux pump 5 is connected with anaerobic pond 2 through pipeline; The sidewall of anaerobic pond 2 is provided with water inlet pipe 1; The pipeline that connects the feed-water end of settling tank 4 and sludge reflux pump 5 is provided with threeway 6, and the 3rd outlet of threeway 6 is connected with excess sludge discharge pipe 7; The top of settling tank 4 is provided with rising pipe 8; In anaerobic pond 2 set inside whisking appliance 9 is arranged; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, in aerobic zone, being provided with changes brush 11 at a high speed, and in the oxygen-starved area, being provided with low speed changes brush 10; Said rolling type recycle ratio adjusting device 12 comprises operating stick 13; Operating stick 13 is fixedly connected with the top of volume flashboard 14, and slide in volume flashboard track 16 both sides of volume flashboard 14, and operating stick 13 is connected with the top movable of volume flashboard track 16; Leave passage between the lower end of volume flashboard 14 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, an end of operating stick 13 is connected with electrically operated device or manual operation rotating disk.
The working method of the adjustable oxidation ditch device of a kind of rolling type recycle ratio comprises the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rolling type recycle ratio, anaerobic pond 2 is connected with the feed-water end of oxidation ditch pond 3, settling tank 4, sludge reflux pump 5 through pipeline successively, and the water side of sludge reflux pump 5 is connected with anaerobic pond 2 through pipeline; The sidewall of anaerobic pond 2 is provided with water inlet pipe 1; The pipeline that connects the feed-water end of settling tank 4 and sludge reflux pump 5 is provided with threeway 6, and the 3rd outlet of threeway 6 is connected with excess sludge discharge pipe 7; The top of settling tank 4 is provided with rising pipe 8; In anaerobic pond 2 set inside whisking appliance 9 is arranged; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, in aerobic zone, being provided with changes brush 11 at a high speed, and in the oxygen-starved area, being provided with low speed changes brush 10; Said rolling type recycle ratio adjusting device 12 comprises operating stick 13; Operating stick 13 is fixedly connected with the top of volume flashboard 14, and slide in volume flashboard track 16 both sides of volume flashboard 14, and operating stick 13 is connected with the top movable of volume flashboard track 16; Leave passage between the lower end of volume flashboard 14 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, an end of operating stick 13 is connected with electrically operated device or manual operation rotating disk;
Step 2: raw waste water is flowed into anaerobic pond 2 from water inlet pipe 1; The returned sluge in autoprecipitation pond 4 pumps into anaerobic pond 2 through sludge reflux pump 5 in the future simultaneously; Raw waste water and returned sluge mix under the effect of whisking appliance 9 and react; The muddy water mixed solution that forms flows into oxidation ditch pond 3, and brush 11 and low speed commentaries on classics brush 10 are changeed in unlatching at a high speed, and muddy water mixed solutions circulate in oxygen-starved area and aerobic interval in the oxidation ditch pond 3; Open two rolling type recycle ratio adjusting devices 12 and degree of being held open unanimity, be used to change the flow section area of the circulation gallery in oxidation ditch pond 3, thereby change the recycle ratio in oxidation ditch pond 3; Muddy water mixed solution flows into settling tank 4 through pipeline; Settling tank 4 supernatant liquids are discharged through rising pipe 8, and settling tank 4 bottom mud parts pump into anaerobic pond 2 through sludge reflux pump 5, and another part discharges through excess sludge discharge pipe 7 through threeway 6.
The working method of said rolling type recycle ratio adjusting device is: rotate through electrically operated device or manual operation rotating disk red-tape operati bar 13, the rotation of operating stick 13 drives volume flashboard 14 and slides.The open degree of volume flashboard is γ, and said γ is that the actual flow section area of oxidation ditch pond circulation gallery accounts for the wide ratio of amassing with available depth of gallery, preferably 0.2≤γ≤0.6.
The present invention has following beneficial effect:
(1) do not change other operating parameter, do not use chemical agent, only can significantly improve the scrubbing effect of oxidation ditch, and can make denitrogenation dephosphorizing reach higher clearance simultaneously through regulating recycle ratio.
(2) compare with other activated sludge process of realizing the same treatment effect, can save oxygen-consumption and about 15% current consumption about 30%.
(3) compare with conventional activated sludge process, saved internal reflux pump house and the internal reflux pump of aerobic zone, reduced floor space, practiced thrift fabrication cost to the oxygen-starved area backflow mixed liquor.
(4) compare with other activated sludge process, enlarged the reflux ratio regulation range of aerobic zone, increased the flexibility of oxidation ditch process influent quality, water yield fluctuation to the oxygen-starved area backflow mixed liquor.
(5) simple to having sewage work's reforming mode that oxidation ditch process is set now.
Description of drawings
Fig. 1 is the structural representation of the adjustable oxidation ditch device of a kind of rolling type recycle ratio of the present invention.
Fig. 2 is a rolling type recycle ratio adjusting device structural representation.
Embodiment
The present invention makes sewage realize denitrogenation dephosphorizing simultaneously through anaerobism, anoxic, aerobic treatment process; The open degree of regulating the volume flashboard of rolling type recycle ratio adjusting device in the oxidation ditch pond during this period changes the flow section area of the circulation gallery in oxidation ditch pond; Regulate and control the recycle ratio of oxidation ditch pond mixed solution with this; Change mixed solution oxygen-starved area and aerobic zone round-robin cycle (mixed solution is in the oxygen-starved area and the time in one week of aerobic zone circulation) and frequency (mixed solution is at oxygen-starved area and aerobic zone round-robin number of times in the unit time) in the oxidation ditch pond, finally under the best open degree of recycle ratio adjusting device, can make the denitrogenation dephosphorizing of the adjustable oxidation ditch device of a kind of rolling type recycle ratio of the present invention reach higher clearance simultaneously.
Below in conjunction with accompanying drawing the present invention is further described.
The adjustable oxidation ditch device of a kind of rolling type recycle ratio, anaerobic pond 2 is connected with the feed-water end of oxidation ditch pond 3, settling tank 4, sludge reflux pump 5 through pipeline successively, and the water side of sludge reflux pump 5 is connected with anaerobic pond 2 through pipeline; The sidewall of anaerobic pond 2 is provided with water inlet pipe 1; The pipeline that connects the feed-water end of settling tank 4 and sludge reflux pump 5 is provided with threeway 6, and the 3rd outlet of threeway 6 is connected with excess sludge discharge pipe 7; The top of settling tank 4 is provided with rising pipe 8; In anaerobic pond 2 set inside whisking appliance 9 is arranged; Oxidation ditch 3 is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, in aerobic zone, being provided with changes brush 11 at a high speed, and in the oxygen-starved area, being provided with low speed changes brush 10; Said rolling type recycle ratio adjusting device 12 comprises operating stick 13; Operating stick 13 is fixedly connected with the top of volume flashboard 14, and slide in volume flashboard track 16 both sides of volume flashboard 14, and operating stick 13 is connected with the top movable of volume flashboard track 16; Leave passage between the lower end of volume flashboard 14 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, an end of operating stick 13 is connected with electrically operated device or manual operation rotating disk.
The working method of the adjustable oxidation ditch device of a kind of rolling type recycle ratio comprises the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rolling type recycle ratio, anaerobic pond 2 is connected with the feed-water end of oxidation ditch pond 3, settling tank 4, sludge reflux pump 5 through pipeline successively, and the water side of sludge reflux pump 5 is connected with anaerobic pond 2 through pipeline; The sidewall of anaerobic pond 2 is provided with water inlet pipe 1; The pipeline that connects the feed-water end of settling tank 4 and sludge reflux pump 5 is provided with threeway 6, and the 3rd outlet of threeway 6 is connected with excess sludge discharge pipe 7; The top of settling tank 4 is provided with rising pipe 8; In anaerobic pond 2 set inside whisking appliance 9 is arranged; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal; In aerobic zone, be provided with commentaries on classics brush 11 (change brush at a high speed and also have aeration oxygen supply function simultaneously concurrently) at a high speed at promotion mixed solution mobile; In the oxygen-starved area, be provided with low speed and change brush 10 (low speed changes brush only has the effect of the mixed solution of promotion mobile); Said rolling type recycle ratio adjusting device 12 comprises operating stick 13, and operating stick 13 is fixedly connected with the top of volume flashboard 14, and slide in volume flashboard track 16 both sides of volume flashboard 14; Operating stick 13 is connected with the top movable of volume flashboard track 16, leaves passage between the lower end of volume flashboard 14 and the upper surface at the bottom of 3 ponds, oxidation ditch pond;
Step 2: raw waste water is flowed into anaerobic pond from water inlet pipe; The returned sluge in autoprecipitation pond pumps into anaerobic pond through sludge reflux pump in the future simultaneously; Raw waste water and returned sluge mix under the effect of whisking appliance and react; The muddy water mixed solution that forms flows into the oxidation ditch pond, opens high speed commentaries on classics brush and low speed and changes brush, and muddy water mixed solution circulates in oxygen-starved area and aerobic interval in the oxidation ditch pond; Open two rolling type recycle ratio adjusting devices and degree of being held open unanimity, be used to change the flow section area of the circulation gallery in oxidation ditch pond, thereby change the recycle ratio in oxidation ditch pond; Muddy water mixed solution flows into settling tank through pipeline; The settling tank supernatant liquid is discharged through rising pipe, and a settling tank bottom mud part pumps into anaerobic pond through sludge reflux pump, and another part is through the three excess sludge discharge tube drainages that stimulate the menstrual flow.
Said rolling type recycle ratio adjusting device comprises operating stick 13; Operating stick 13 is fixedly connected through taper pin 15 with the top of volume flashboard 14; Slide in volume flashboard track 16 both sides of volume flashboard; Operating stick is connected (circular hole that operating stick passes the top of volume flashboard track) with the top movable of volume flashboard track, operating stick one end is provided with connecting key 18, has the electrically operated device (commercially available) or the manual operation rotating disk (commercially available) of auto-lock function with connection; Operating stick 13 the other ends are provided with plug 19; The diameter of plug 19 is greater than the diameter of the circular hole at the top of rolling up the flashboard track, comes off from the circular hole at volume flashboard track top to prevent operating stick 13, leaves passage between the lower end of volume flashboard and the upper surface at the bottom of the pond, oxidation ditch pond; When volume flashboard 14 was rolled-up, outside one side was provided with scale 17, and scale is indicated current open degree during volume flashboard scrolling.
During volume flashboard 14 complete shut-downs; Leave passage between the upper surface at the bottom of the lower edge of volume flashboard 14 and the pond in oxidation ditch pond; Its distance is the 1/30 (available depth in oxidation ditch pond of oxidation ditch pond available depth; Be upper surface to the oxidation ditch pond distance of high design water level at the bottom of the oxidation ditch pond), the width of volume flashboard 14 is in the wide unanimity of place gallery.The working method of rolling type recycle ratio adjusting device is: rotate through electrically operated device or manual operation rotating disk red-tape operati bar 13, the rotation of operating stick 13 drives volume flashboard 14 and slides.
Said volume flashboard open degree is γ, and during volume flashboard complete shut-down, γ is 0.03; During volume flashboard standard-sized sheet, the highest design water level is concordant in volume flashboard lower edge and the oxidation ditch pond, and γ is 1.When between 0.03≤γ≤1.0 are regulated, oxidation ditch pond recycle ratio is changed between hundreds of tens.Can make the best setting scope of rolling type recycle ratio adjusting device that the oxidation ditch process denitrogenation dephosphorizing reaches higher clearance simultaneously between 0.2≤γ≤0.6.
Adopt the adjustable oxidation ditch device of rolling type recycle ratio shown in Figure 1; Dissolved oxygen concentration is that the aerobic zone initiating terminal at 0.5mg/L place and oxygen-starved area initiating terminal that dissolved oxygen concentration is the 0.5mg/L place are provided with two rolling type recycle ratio adjusting devices respectively in oxidation ditch pond circulation gallery, and the volume flashboard lower edge and the distance between the upper surface at the bottom of the oxidation ditch pond of this rolling type recycle ratio adjusting device are 1/30 of oxidation ditch pond available depth.
Embodiment 1
Flooding quantity 50L/h, hydraulic detention time HRT=12h, return sludge ratio RS=100%, sludge age SRT=12d, mixed solution sludge concentration MLSS=4000mg/L, device water inlet and effluent quality of sedimentation tank and removal effect are seen table 2.
The different open degree scrubbing of oxidation ditch device effect that table 2 rolling type recycle ratio is adjustable
Embodiment 2:
Flooding quantity 50L/h, hydraulic detention time HRT=12h, return sludge ratio R
S=100%, sludge age SRT=12d, mixed solution sludge concentration MLSS=4000mg/L, device water inlet and effluent quality of sedimentation tank and removal effect are seen table 3.
The different open degree scrubbing of oxidation ditch device effect that table 3 rolling type recycle ratio is adjustable
Embodiment 3:
Flooding quantity 60L/h, hydraulic detention time HRT=10h, return sludge ratio R
S=100%, sludge age SRT=12d, mixed solution sludge concentration MLSS=4000mg/L, device water inlet and effluent quality of sedimentation tank and removal effect are seen table 4.
The different open degree scrubbing of oxidation ditch device effect that table 4 rolling type recycle ratio is adjustable
Experimental stage will be rolled up flashboard and closed fully, and muddy water mixed solution only passes through from volume flashboard foot passage, and this moment, open degree γ minimum was 0.03, will roll up the flashboard standard-sized sheet, and this moment, open degree γ was 1 to the maximum; Simultaneously in best setting scope 0.2≤γ≤0.6; Effluent quality of sedimentation tank can reach the one-level B standard in " urban wastewater treatment firm pollutant emission standard (GB18918-2002) "; In the best setting scope, find a certain best open degree through test, this moment, the settling tank water outlet can reach the one-level A standard in " urban wastewater treatment firm pollutant emission standard (GB18918-2002) ".
Claims (3)
1. adjustable oxidation ditch device of rolling type recycle ratio, anaerobic pond (2) is connected with the feed-water end of oxidation ditch pond (3), settling tank (4), sludge reflux pump (5) through pipeline successively, and the water side of sludge reflux pump (5) is passed through pipeline and is connected with anaerobic pond (2); The sidewall of anaerobic pond (2) is provided with water inlet pipe (1); The pipeline that connects the feed-water end of settling tank (4) and sludge reflux pump (5) is provided with threeway (6), and the 3rd outlet of threeway (6) is connected with excess sludge discharge pipe (7); The top of settling tank (4) is provided with rising pipe (8); In anaerobic pond (2) set inside whisking appliance (9) is arranged; Oxidation ditch pond (3) is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device (12) at aerobic zone initiating terminal and oxygen-starved area initiating terminal; In aerobic zone, being provided with changes brush (11) at a high speed; In the oxygen-starved area, being provided with low speed changes brush (10), and said rolling type recycle ratio adjusting device (12) comprises operating stick (13), and operating stick (13) is fixedly connected with the top of volume flashboard (14); Slide in volume flashboard track (16) both sides of volume flashboard (14); Operating stick (13) is connected with the top movable of volume flashboard track (16), leaves passage between the lower end of volume flashboard (14) and the upper surface at the bottom of the pond, oxidation ditch pond (3), and an end of operating stick (13) is connected with electrically operated device or manual operation rotating disk.
2. the working method of the adjustable oxidation ditch device of rolling type recycle ratio is characterized in that comprising the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rolling type recycle ratio; Anaerobic pond (2) is connected with the feed-water end of oxidation ditch pond (3), settling tank (4), sludge reflux pump (5) through pipeline successively, and the water side of sludge reflux pump (5) is connected with anaerobic pond (2) through pipeline; The sidewall of anaerobic pond (2) is provided with water inlet pipe (1); The pipeline that connects the feed-water end of settling tank (4) and sludge reflux pump (5) is provided with threeway (6), and the 3rd outlet of threeway (6) is connected with excess sludge discharge pipe (7); The top of settling tank (4) is provided with rising pipe (8); In anaerobic pond (2) set inside whisking appliance (9) is arranged; Oxidation ditch pond (3) is divided into aerobic zone and oxygen-starved area; Be respectively arranged with rolling type recycle ratio adjusting device (12) at aerobic zone initiating terminal and oxygen-starved area initiating terminal; In aerobic zone, being provided with changes brush (11) at a high speed; In the oxygen-starved area, being provided with low speed changes brush (10), and said rolling type recycle ratio adjusting device (12) comprises operating stick (13), and operating stick (13) is fixedly connected with the top of volume flashboard (14); Slide in volume flashboard track (16) both sides of volume flashboard (14); Operating stick (13) is connected with the top movable of volume flashboard track (16), leaves passage between the lower end of volume flashboard (14) and the upper surface at the bottom of the pond, oxidation ditch pond (3), and an end of operating stick (13) is connected with electrically operated device or manual operation rotating disk;
Step 2: raw waste water is flowed into anaerobic pond (2) from water inlet pipe (1); The returned sluge of autoprecipitation pond (4) pumps into anaerobic pond (2) through sludge reflux pump (5) in the future simultaneously; Raw waste water and returned sluge mix under the effect of whisking appliance (9) and react; The muddy water mixed solution that forms flows into oxidation ditch pond (3), opens high speed commentaries on classics brush (11) and low speed and changes brush (10), and the interior muddy water mixed solution in oxidation ditch pond (3) circulates in oxygen-starved area and aerobic interval; Open two rolling type recycle ratio adjusting devices (12) and degree of being held open unanimity, be used to change the flow section area of the circulation gallery in oxidation ditch pond (3), thereby change the recycle ratio in oxidation ditch pond (3); Muddy water mixed solution flows into settling tank (4) through pipeline; Settling tank (4) supernatant liquid is discharged through rising pipe (8), and settling tank (a 4) bottom mud part pumps into anaerobic pond (2) through sludge reflux pump (5), and another part discharges through excess sludge discharge pipe (7) through threeway (6).
3. the working method of the adjustable oxidation ditch device of a kind of rolling type recycle ratio according to claim 2 is characterized in that the rotation of said operating stick (13) drives volume flashboard (14) slip, and said open degree is γ, said 0.2≤γ≤0.6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210245284 CN102718372B (en) | 2012-07-16 | 2012-07-16 | Roller shutter type recycle-ratio-adjustable oxidation ditch device and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210245284 CN102718372B (en) | 2012-07-16 | 2012-07-16 | Roller shutter type recycle-ratio-adjustable oxidation ditch device and operation method thereof |
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| CN102718372A true CN102718372A (en) | 2012-10-10 |
| CN102718372B CN102718372B (en) | 2013-07-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045150A (en) * | 2013-03-14 | 2014-09-17 | 上海市政工程设计研究总院（集团）有限公司 | Anaerobic acidification hydrolysis sedimentation tank for sewage pretreatment |
| WO2022057125A1 (en) * | 2020-09-17 | 2022-03-24 | 广东粤海水务股份有限公司 | Anoxic and aerobic interactive reaction device and reaction method |
| CN115321667A (en) * | 2022-09-15 | 2022-11-11 | 重庆市梁平排水有限公司 | Biochemical pond of liquid level adjustable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60132700A (en) * | 1983-12-21 | 1985-07-15 | Sumitomo Jukikai Envirotec Kk | Biological denitrification treatment of sewage in recirculation water channel type aeration tank |
| JPH0461998A (en) * | 1990-06-26 | 1992-02-27 | Kubota Corp | Discharged water treatment device |
| CN200981836Y (en) * | 2006-11-07 | 2007-11-28 | 张新春 | Concentric nesting active oxidation channel |
| CN101182067A (en) * | 2007-11-21 | 2008-05-21 | 天津市天水环保设计工程有限公司 | Main ditch surrounding functional pool type integral combined building oxidation ditch |
-
2012
- 2012-07-16 CN CN 201210245284 patent/CN102718372B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60132700A (en) * | 1983-12-21 | 1985-07-15 | Sumitomo Jukikai Envirotec Kk | Biological denitrification treatment of sewage in recirculation water channel type aeration tank |
| JPH0461998A (en) * | 1990-06-26 | 1992-02-27 | Kubota Corp | Discharged water treatment device |
| CN200981836Y (en) * | 2006-11-07 | 2007-11-28 | 张新春 | Concentric nesting active oxidation channel |
| CN101182067A (en) * | 2007-11-21 | 2008-05-21 | 天津市天水环保设计工程有限公司 | Main ditch surrounding functional pool type integral combined building oxidation ditch |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045150A (en) * | 2013-03-14 | 2014-09-17 | 上海市政工程设计研究总院（集团）有限公司 | Anaerobic acidification hydrolysis sedimentation tank for sewage pretreatment |
| WO2022057125A1 (en) * | 2020-09-17 | 2022-03-24 | 广东粤海水务股份有限公司 | Anoxic and aerobic interactive reaction device and reaction method |
| CN115321667A (en) * | 2022-09-15 | 2022-11-11 | 重庆市梁平排水有限公司 | Biochemical pond of liquid level adjustable |
| CN115321667B (en) * | 2022-09-15 | 2024-03-22 | 重庆市梁平排水有限公司 | Biochemical pool with adjustable liquid level |
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| CN102718372B (en) | 2013-07-03 |
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