CN102718321A - Rotary type recycle ratio adjustable oxidation ditch device and operating method thereof - Google Patents
Rotary type recycle ratio adjustable oxidation ditch device and operating method thereof Download PDFInfo
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- CN102718321A CN102718321A CN2012102452856A CN201210245285A CN102718321A CN 102718321 A CN102718321 A CN 102718321A CN 2012102452856 A CN2012102452856 A CN 2012102452856A CN 201210245285 A CN201210245285 A CN 201210245285A CN 102718321 A CN102718321 A CN 102718321A
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Abstract
The invention discloses a rotary type recycle ratio adjustable oxidation ditch device and an operating method of the rotary type recycle ratio adjustable oxidation ditch device. The device comprises an anaerobic pool (2), an oxidation ditch pool (3) and a sedimentation pool (4), wherein a first stirrer (9) is arranged inside the anaerobic pool (2); a second stirrer (10) and a third stirrer (11) are respectively arranged at two ends of the oxidation ditch pool (3); the oxidation ditch pool (3) is divided into an aerobic zone and an anoxic zone; a micropore aerator (13) is arranged inside the aerobic zone; and rotary type recycle ratio regulating devices (12) are respectively arranged at the starting end of the aerobic zone and the starting end of the anoxic zone. The rotary type recycle ratio adjustable oxidation ditch device has the advantages that other operation parameters are not changed; no chemical agents are used; the pollution cleaning effect of the oxidation ditch can be greatly improved by only regulating the recycle ratio; and furthermore a higher removing rate can be achieved during denitrification and dephosphorization at the same time; and in comparison with other activated slime process for realizing the same processing effect, the oxygen consumption and the electricity consumption are saved.
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 rotary 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 rotary 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 rotary recycle ratio.
Technical scheme of the present invention is summarized as follows:
The adjustable oxidation ditch device of a kind of rotary 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 first whisking appliance 9 is arranged; Be respectively arranged with second whisking appliance 10 and the 3rd whisking appliance 11 at the two ends in oxidation ditch pond 3; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; In aerobic zone, be provided with micro-hole aerator 13; Be respectively arranged with rotary recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, said rotary recycle ratio adjusting device 12 comprises operating stick 14, and the middle part of operating stick 14 is fixedly connected with the middle part of rotation flashboard 18; The bottom of operating stick 14 flexibly connects through overcoat bearing 20 and operating stick Connection Block 21; Leave passage between the lower edge of rotation flashboard 18 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, the top of operating stick 14 and service platform 17 flexibly connect, and the top of operating stick 14 is connected with electrically operated device or manual operation rotating disk.
The working method of the adjustable oxidation ditch device of a kind of rotary recycle ratio comprises the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rotary 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 first whisking appliance 9 is arranged; Be respectively arranged with second whisking appliance 10 and the 3rd whisking appliance 11 at the two ends in oxidation ditch pond 3; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; In aerobic zone, be provided with micro-hole aerator 13; Be respectively arranged with rotary recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, said rotary recycle ratio adjusting device 12 comprises operating stick 14, and the middle part of operating stick 14 is fixedly connected with the middle part of rotation flashboard 18; The bottom of operating stick 14 flexibly connects through overcoat bearing 20 and operating stick Connection Block 21; Leave passage between the lower edge of rotation flashboard 18 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, the top of operating stick 14 and service platform 17 flexibly connect, and the top of operating stick 14 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 first whisking appliance 9 and react; The muddy water mixed solution that forms flows into oxidation ditch pond 3, opens micro-hole aerator 13, second whisking appliance 10 and the 3rd whisking appliance 11, and the muddy water mixed solution in the oxidation ditch pond 3 circulates in oxygen-starved area and aerobic interval; The angle θ that opens two rotary recycle ratio adjusting devices 12 and keep rotation flashboard 18 to open is consistent, and said 0 °≤θ≤90 ° is used to change the flow section area of the circulation gallery in oxidation ditch pond 3, thereby changes 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 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 rotary recycle ratio of the present invention.
Fig. 2 is rotary 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 rotation flashboard of the rotatable recycle ratio adjusting device of oxidation ditch pond inward turning 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 rotary 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 rotary 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 first whisking appliance 9 is arranged; Be respectively arranged with second whisking appliance 10 and the 3rd whisking appliance 11 at the two ends in oxidation ditch pond 3; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; In aerobic zone, be provided with micro-hole aerator 13; Be respectively arranged with rotary recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal, said rotary recycle ratio adjusting device 12 comprises operating stick 14, and the middle part of operating stick 14 is fixedly connected with the middle part of rotation flashboard 18; The bottom of operating stick 14 flexibly connects through overcoat bearing 20 and operating stick Connection Block 21; Leave passage between the lower edge of rotation flashboard 18 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, the top of operating stick 14 and service platform 17 flexibly connect, and the top of operating stick 14 is connected with electrically operated device or manual operation rotating disk.
The working method of the adjustable oxidation ditch device of a kind of rotary recycle ratio comprises the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rotary 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 first whisking appliance 9 is arranged; Be respectively arranged with second whisking appliance 10 and the 3rd whisking appliance 11 at the two ends in oxidation ditch pond 3; Oxidation ditch pond 3 is divided into aerobic zone and oxygen-starved area; In aerobic zone, be provided with micro-hole aerator 13; Be respectively arranged with rotary recycle ratio adjusting device 12 at aerobic zone initiating terminal and oxygen-starved area initiating terminal; Said rotary recycle ratio adjusting device 12 comprises operating stick 14; The middle part of operating stick 14 is fixedly connected through taper pin 19 with the middle part of rotation flashboard 18; The bottom of operating stick 14 flexibly connects through overcoat bearing 20 and operating stick Connection Block 21, leaves passage between the lower edge of rotation flashboard 18 and the upper surface at the bottom of 3 ponds, oxidation ditch pond, and the top of operating stick 14 and service platform 17 flexibly connect; (the second overcoat bearing can reduce the wearing and tearing of operating stick and service platform contact part operating stick preferably to be provided with the second overcoat bearing 16 in the position that operating stick is connected with service platform; Reduce swinging moment), the top of operating stick 14 is provided with connecting key 15, has the electrically operated device (commercially available) or the manual operation rotating disk (commercially available) of angle of rotation telltale and auto-lock function (preventing that operating stick from rotating voluntarily under the off-duty situation of operating gear) with connection.
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 first whisking appliance and react; The muddy water mixed solution that forms flows into the oxidation ditch pond, opens micro-hole aerator, second whisking appliance and the 3rd whisking appliance, and the muddy water mixed solution in the oxidation ditch pond circulates in oxygen-starved area and aerobic interval; The angle θ that opens two rotary recycle ratio adjusting devices and keep the rotation flashboard to open is consistent, and said 0 °≤θ≤90 ° is used to change the flow section area of the circulation gallery in oxidation ditch pond, thereby changes 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.
The highest design water level is concordant in upper edge and the oxidation ditch pond of rotation flashboard; Leave passage between the upper surface at the bottom of the lower edge of rotation flashboard 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), rotation flashboard width is with to belong to gallery wide consistent.The working method of rotary recycle ratio adjusting device is: rotate along vertical line through electrically operated device or manual operation rotating disk red-tape operati bar, the rotation driven rotary flashboard of operating stick rotates.
Adopt the adjustable oxidation ditch device of rotary 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 rotary recycle ratio adjusting devices respectively in oxidation ditch pond circulation gallery.Experimental stage, will rotate flashboard opening angle θ be opened into 0 ° (the rotation flashboard cuts out fully, muddy water mixed solution only from the flashboard foot passage through), will to rotate flashboard opening angle θ unlatching be 90 ° (flashboard complete openings).
Embodiment 1
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 2.
The different open degree scrubbing of oxidation ditch device effect that the rotary recycle ratio of table 2 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 the rotary recycle ratio of table 3 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 the rotary recycle ratio of table 4 is adjustable
The experiment proof; The highest design water level is concordant in upper edge and the oxidation ditch pond of rotation flashboard; Distance between the upper surface at the bottom of the lower edge of rotation flashboard and the pond in oxidation ditch pond is 1/30 of an oxidation ditch pond available depth; Rotation flashboard width is wide consistent with the place gallery; The angle θ that the rotation flashboard is opened is in 25 °≤θ≤65 °; 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, finds best opening angle θ=45 ° through test, and this moment, the settling tank water outlet can reach the one-level A standard in " urban wastewater treatment firm pollutant emission standard (GB18918-2002) ".
If reduce the height of rotation flashboard upper edge, or change the distance between the upper surface at the bottom of the pond in lower edge and oxidation ditch pond of rotation flashboard, or reduce to rotate the flashboard width, the scope of opening angle θ that then obviously improves the rotation flashboard of treatment effect can change to some extent.
Claims (2)
1. adjustable oxidation ditch device of rotary 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 first whisking appliance (9) is arranged; Be respectively arranged with second whisking appliance (10) and the 3rd whisking appliance (11) at the two ends of oxidation ditch pond (3); Oxidation ditch pond (3) is divided into aerobic zone and oxygen-starved area; In said aerobic zone, be provided with micro-hole aerator (13); Be respectively arranged with rotary recycle ratio adjusting device (12) at aerobic zone initiating terminal and oxygen-starved area initiating terminal; Said rotary recycle ratio adjusting device (12) comprises operating stick (14); The middle part of operating stick (14) is fixedly connected with the middle part of rotation flashboard (18), and the bottom of operating stick (14) flexibly connects through overcoat bearing (20) and operating stick Connection Block (21), leaves passage between the lower edge of rotation flashboard (18) and the upper surface at the bottom of the pond, oxidation ditch pond (3); The top of operating stick (14) and service platform (17) flexibly connect, and the top of operating stick (14) is connected with electrically operated device or manual operation rotating disk.
2. the working method of the adjustable oxidation ditch device of rotary recycle ratio is characterized in that comprising the steps:
Step 1: prepare the adjustable oxidation ditch device of a kind of rotary 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 first whisking appliance (9) is arranged; Be respectively arranged with second whisking appliance (10) and the 3rd whisking appliance (11) at the two ends of oxidation ditch pond (3); Oxidation ditch pond (3) is divided into aerobic zone and oxygen-starved area; In said aerobic zone, be provided with micro-hole aerator (13); Be respectively arranged with rotary recycle ratio adjusting device (12) at aerobic zone initiating terminal and oxygen-starved area initiating terminal; Said rotary recycle ratio adjusting device (12) comprises operating stick (14); The middle part of operating stick (14) is fixedly connected with the middle part of rotation flashboard (18), and the bottom of operating stick (14) flexibly connects through overcoat bearing (20) and operating stick Connection Block (21), leaves passage between the lower edge of rotation flashboard (18) and the upper surface at the bottom of the pond, oxidation ditch pond (3); The top of operating stick (14) and service platform (17) flexibly connect, and the top of operating stick (14) 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 first whisking appliance (9) and react; The muddy water mixed solution that forms flows into oxidation ditch pond (3); Open micro-hole aerator (13), second whisking appliance (10) and the 3rd whisking appliance (11), the muddy water mixed solution in oxidation ditch pond (3) circulates in oxygen-starved area and aerobic interval; The angle θ that opens two rotary recycle ratio adjusting devices (12) and keep rotation flashboard (18) to open is consistent, is used to change the flow section area of the circulation gallery in oxidation ditch pond (3), thereby changes 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).
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| CN 201210245285 CN102718321B (en) | 2012-07-16 | 2012-07-16 | Rotary type recycle ratio adjustable oxidation ditch device and operating method thereof |
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| CN 201210245285 CN102718321B (en) | 2012-07-16 | 2012-07-16 | Rotary type recycle ratio adjustable oxidation ditch device and operating method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204585A (en) * | 2012-10-17 | 2013-07-17 | 林金华 | Activated sludge process for sewage treatment |
| CN105060469A (en) * | 2015-07-30 | 2015-11-18 | 天津霍普环保科技有限公司 | Sewage treatment reactor |
| CN106630498A (en) * | 2017-02-21 | 2017-05-10 | 云南水务投资股份有限公司 | Integral rural sewage treatment equipment |
| CN106745741A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | The anaerobic oxidation ditch and its operating method of intensified anti-nitrated denitrogenation dephosphorizing |
| CN110746037A (en) * | 2019-09-29 | 2020-02-04 | 广西皖维生物质科技有限公司 | Pretreatment method of high-concentration organic wastewater |
| CN117585743A (en) * | 2024-01-18 | 2024-02-23 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
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| CN101041509A (en) * | 2007-04-24 | 2007-09-26 | 上海亚同环保实业有限公司 | Circulation flow ring-shaped biological denitrification phosphorous removal technique |
| CN200981836Y (en) * | 2006-11-07 | 2007-11-28 | 张新春 | Concentric nesting active oxidation channel |
| CN101844829A (en) * | 2009-11-17 | 2010-09-29 | 天津城市建设学院 | High-efficiency biological nitrogen and phosphorus removal oxidation ditch |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200981836Y (en) * | 2006-11-07 | 2007-11-28 | 张新春 | Concentric nesting active oxidation channel |
| CN101041509A (en) * | 2007-04-24 | 2007-09-26 | 上海亚同环保实业有限公司 | Circulation flow ring-shaped biological denitrification phosphorous removal technique |
| CN101844829A (en) * | 2009-11-17 | 2010-09-29 | 天津城市建设学院 | High-efficiency biological nitrogen and phosphorus removal oxidation ditch |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204585A (en) * | 2012-10-17 | 2013-07-17 | 林金华 | Activated sludge process for sewage treatment |
| CN103204585B (en) * | 2012-10-17 | 2017-06-20 | 华鸿水务集团有限公司 | Sewage disposal process by activated sludge process |
| CN105060469A (en) * | 2015-07-30 | 2015-11-18 | 天津霍普环保科技有限公司 | Sewage treatment reactor |
| CN106745741A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | The anaerobic oxidation ditch and its operating method of intensified anti-nitrated denitrogenation dephosphorizing |
| CN106630498A (en) * | 2017-02-21 | 2017-05-10 | 云南水务投资股份有限公司 | Integral rural sewage treatment equipment |
| CN106630498B (en) * | 2017-02-21 | 2023-07-25 | 云南水务投资股份有限公司 | Integrated village and town sewage treatment equipment |
| CN110746037A (en) * | 2019-09-29 | 2020-02-04 | 广西皖维生物质科技有限公司 | Pretreatment method of high-concentration organic wastewater |
| CN117585743A (en) * | 2024-01-18 | 2024-02-23 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
| CN117585743B (en) * | 2024-01-18 | 2024-04-16 | 浙江浙达水业有限公司 | Sewage treatment regulating tank and regulating method |
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