WO2005026054B1 - Drain and flood wastewater treatment system and associated methods - Google Patents
Drain and flood wastewater treatment system and associated methodsInfo
- Publication number
- WO2005026054B1 WO2005026054B1 PCT/US2004/028531 US2004028531W WO2005026054B1 WO 2005026054 B1 WO2005026054 B1 WO 2005026054B1 US 2004028531 W US2004028531 W US 2004028531W WO 2005026054 B1 WO2005026054 B1 WO 2005026054B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vessel
- wastewater
- media
- system recited
- predetermined time
- Prior art date
Links
- 238000004065 wastewater treatment Methods 0.000 title claims abstract 3
- 239000002351 wastewater Substances 0.000 claims abstract 27
- -1 ammonia ions Chemical class 0.000 claims 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 9
- 239000000463 material Substances 0.000 claims 7
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims 6
- 238000005086 pumping Methods 0.000 claims 5
- 238000001914 filtration Methods 0.000 claims 4
- 230000035812 respiration Effects 0.000 claims 4
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 4
- 241000894006 Bacteria Species 0.000 claims 3
- 238000004064 recycling Methods 0.000 claims 3
- 239000000370 acceptor Substances 0.000 claims 2
- 150000001768 cations Chemical class 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 2
- 239000007789 gas Substances 0.000 claims 2
- 230000005484 gravity Effects 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 2
- 238000005273 aeration Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
Abstract
A wastewater treatment system includes at least one fluidized bed reactor (11-14) containing media (20) to which biofilms are attached. The vessel has an inlet (15) and outlet (16) adjacent to the bottom and an overflow outlet (18) adjacent to the top. Wastewater is admitted into the bottom of the vessel and contacted with the media. The Wastewater is agitated to scour some of the biofilm, then additional wastewater is added to overflow the vessel and remove some of the biofilm. The vessel is then drained to aerate the media surface, and then refilled. The fill and drain cycles effect nitrification and denitrification of the wastewater.
Claims
AMENDED CLAIMS
[received by the International Bureau on 27 January 2006 (27.01.2006); original claims 20-39 amended (6 pages)]
+ Statement
draining the vessel for aerating the media surface, causing a nitrification of the adsorbed ammonia ions to nitrate and nitrite ions upon exposure to oxygen in the air; refilling the vessel with water after a second predetermined time, thereby permitting the nitrate and nitrite ions to desorb into the refilling water; and permitting respiration of the biofilm bacteria to occur, wherein the nitrate and nitrite ions become terminal electron acceptors in respiration reactions, leading to a liberation of nitrogen gas.
20- A system for wastewater treatment comprising: at least one biological reactor comprising a vessel containing media having a surface adapted to permit biofilms to attach thereto, the vessel having an inlet and an outlet adjacent a bottom thereof and an overflow outlet adjacent a top thereof; means for admitting wastewater into the vessel via the inlet; means for agitating wastewater in the vessel with sufficient energy to scour at least some of the biofilm material from the media; means for admitting additional wastewater into the vessel via the inlet following a predetermined time to a level sufficient to cause water and the scoured biofilm material to exit the overflow outlet; means for draining wastewater through the bottom outlet after a first predetermined time for permitting aeration of the media; ; means for refilling the vessel with wastewater to be treated after a second predetermined time;
18
means for controlling the wastewater draining means to retain the wastewater in the vessel for the first predetermined time following admission of the wastewater; and means for controlling the refilling means to permit the vessel to remain drained for the second predetermined time following drainage of the wastewater.
21. The system recited in Claim 20, wherein the media has one of natural or induced cation adsorption capacity.
22. The system recited in Claim 20, wherein the draining means comprises at least one of means for opening the vessel outlet for permitting gravity flow therethrough and a pump for pumping out the vessel through the vessel bottom outlet.
23. The system recited in Claim 20, further comprising a filter positioned for filtering the water drained from the vessel.
24. The system recited in Claim 20, further comprising a filter positioned for filtering the overflow.
25. The system recited in Claim 20, further comprising means for recycling at least some of the drained water to the vessel for additional treatment.
19
26. The system recited in Claim 25, wherein the recycling means comprises a pump.
27. The system recited in Claim 20, wherein the media comprise a substantially πonbuoyant media, and wherein the agitating means comprises a pump for pumping wastewater into the vessel with sufficient upflow velocity to fluidize the media when the vessel is substantially full,
28. The system recited in Claim 20, wherein the media comprise a substantially buoyant media, and wherein the agitating means comprises means for fluidizing the media, comprising one of a gas sparging pump and a mecharijcal agitation means.
29. The system recited in Claim 20, wherein the wastewater-admitting means comprises a pump for pumping the wastewater into the vessel from an inlet adjacent the vessel bottom.
30. The system recited in Claim 29, wherein the additional-wastewater- admitting means comprises the pump. :
31. A system for treating wastewater comprising: a first vessel containing media having a surface adapted to permit biofilms to attach thereto, the first vessel having an inlet and an outlet adjacent a bottom thereof and an overflow outlet adjacent a top thereof;
20
means for admitting wastewater to be treated into the first vessel via the inlet; : means agitating the wastewater in the first vessel with sufficient energy to scour at least some of the biofilm material from the media surface; means for adding additional wastewater to the first vessel to an overflow level, the overflow containing at least some of the scoured biofilm material; means for transporting the overflow to a second vessel containing media having a surface adapted to permit biofilms to attach thereto, the second vessel having an inlet and an outlet adjacent a bottom thereof and an overflow outlet adjacent a top thereof; means for draining the first vessel for aerating the media surface; means for transporting the drainage from the first vessel to the second vessel; means for refilling the first vessel after a second predetermined time; means for agitating the wastewater in the second vessel with sufficient energy to scour at least some of the biofilm material from the media surface; means for adding additional wastewater to the second vessel to an overflow level, the overflow containing at least some of the scoured bϊofrlm material; and means for draining the second vessel for aerating the media surface.
32. The system recited in Claim 31 , wherein the media has one of natural or induced cation adsorption capacity,
21
33. The system recited in Claim 31, wherein the first- and the second- vessel draining means each comprises at least one of means for opening the first and the second bottom outlet, respectively, for permitting gravity flow therethrough and a first and a second pump for pumping out the first and the second vessel,
5 respectively, through the first and the second vessel bottom outlets, :
34. The system recited in Claim 31 , further comprising at least one filter for filtering the water drained from at least one of the first and the second vessel, ■
o 35. The system recited in Claim 31 , further comprising at least one filter for filtering the overflow from at least one of the first and the second vessel.
36. The system recited in Claim 31 , further comprising means for recycling at least some of the drained water from the second vessel to the first vessel for 5 additional treatment.
37. The system recited in Claim 31, wherein the media comprise a substantially πonbuoyant media, and wherein the agitating means comprise a first and a second pump for pumping wastewater into the respective first and the second 0 vessel with sufficient upflow velocity to fluid \ze the media when the respective first and second vessel is substantially full.
38. The system recited in Claim 31 , wherein the media comprise a substantially buoyant media, and wherein the agitating means comprise means for
22
fluidizing the media in the respective first and the second vessel, comprising one of a gas sparging pump and a mechanical agitation means.
39. A system for treating wastewater comprising: a vessel for contacting media with wastewater to be treated for a first predetermined time, the media having a surface adapted to permit biofilms to attach thereto, the biofiims comprising bacteria, the media and the biofilms adapted to permit ammonia ions in the wastewater to adsorb thereto; means for agitating the wastewater in the vessel with sufficient energy to scour at least some of the biofilm material from the media surface; means for draining the vessel for aerating the media surface, causing a nitrification of the adsorbed ammonia ions to nitrate and nitrite ions upon exposure to oxygen in the air; means for refilling the vessel with water after a second predetermined time, thereby permitting the nitrate and nitrite ions to desorb into the refilling water, respiration of the biofilm bacteria thereby permitted to occur, wherein the nitrate and nitrite ions become terminal electron acceptors in respiration reactions, leading to a liberation of nitrogen gas; means for controlling the vessel draining means to retain the wastewater in the vessel for the first predetermined time; and means for controlling the vessel refilling means to permit the vessel to remain drained for the second predetermined time following drainage of the vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50065403P | 2003-09-05 | 2003-09-05 | |
| US60/500,654 | 2003-09-05 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2005026054A2 WO2005026054A2 (en) | 2005-03-24 |
| WO2005026054A3 WO2005026054A3 (en) | 2006-02-02 |
| WO2005026054B1 true WO2005026054B1 (en) | 2006-03-30 |
Family
ID=34312210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2004/028531 WO2005026054A2 (en) | 2003-09-05 | 2004-09-02 | Drain and flood wastewater treatment system and associated methods |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US7056438B2 (en) |
| WO (1) | WO2005026054A2 (en) |
Families Citing this family (7)
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| WO2005026052A2 (en) * | 2003-06-19 | 2005-03-24 | University Of Hawaii | Bionest reactor for the application of anaerobic wastewater treatment and bioenergy recovery |
| US7347940B2 (en) * | 2004-06-17 | 2008-03-25 | Worrell Water Technologies, Llc | Nitrogen removal system and method for wastewater treatment lagoons |
| US7309434B2 (en) * | 2004-06-28 | 2007-12-18 | Potts David A | Apparatus and method for wastewater treatment |
| WO2008124514A2 (en) * | 2007-04-04 | 2008-10-16 | Tvt Us Corp. | Fixed film bioprocess for removing carbon compounds in oil and gas drilling sludge |
| US20110089171A1 (en) * | 2009-10-21 | 2011-04-21 | Reilly James P | Wastewater treatment process basins |
| CN103153880A (en) | 2010-08-24 | 2013-06-12 | 三T净化有限公司 | Wastewater treatment system |
| US9120038B2 (en) | 2010-09-07 | 2015-09-01 | Liberty Evans, Llc | Wastewater treatment system design |
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2004
- 2004-09-02 WO PCT/US2004/028531 patent/WO2005026054A2/en active Application Filing
- 2004-09-02 US US10/933,139 patent/US7056438B2/en not_active Expired - Fee Related
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