CN1994927A - Method for removing nitrobenzene from original water adopting powder active carbon and coagulant - Google Patents
Method for removing nitrobenzene from original water adopting powder active carbon and coagulant Download PDFInfo
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- CN1994927A CN1994927A CN 200610151163 CN200610151163A CN1994927A CN 1994927 A CN1994927 A CN 1994927A CN 200610151163 CN200610151163 CN 200610151163 CN 200610151163 A CN200610151163 A CN 200610151163A CN 1994927 A CN1994927 A CN 1994927A
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- wooden powder
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Abstract
The invention discloses a removing method of nitrobenzene in the raw water through active charcoal and coagulant, which comprises the following steps: 1. adding 20-80mg/l wood powder active charcoal in the water; 2. adding 40-80mg/l coagulant in the reacting pond first; 3. blending wood powder active charcoal and raw material to input in the input pipe to flow along water for 2-3h; 4. making blended water through reacting pond, sediment pond and sand filter; sterilizing; obtaining the water with the nitrobenzene content at 0.002-0.006mg/l.
Description
Technical field
The present invention relates to remove the method for oil of mirbane in the former water.
Background technology
In China oil of mirbane took place once and entered source water in a large number, had a strong impact on source quality, the major accident that causes the city to cut off the water.Contain oil of mirbane in the tap water, not only violated the hygienic standard of Drinking Water, and oil of mirbane is doubtful carcinogenic artificial synthetic organic materials, there is serious potential hazard in human body, thereby brought very big threat for people's water safety problem.After certain or certain several chemosynthesis pollutent entered water body in a large number, conventional water technology was difficult to effectively remove to it.At present, the charcoal sand filtration process that adopts granulated active carbon (GAC) and quartz sand to form removes the method for oil of mirbane in the former water, but the removal of this method p-nitrophenyl relatively lags behind, and the residence time of water in filter bed is very short, so be difficult to realize effective removal of oil of mirbane, there is GAC periodic replacement problem simultaneously, poor operability; Adopt the method for advanced oxidation, with strong oxidizer under the condition that catalyzer exists with nitrobenzene oxidation, but because nitro is very stable functional group, therefore the resistance of oxidation that contains substituent phenyl ring is also stronger, adopts the removal effect of method p-nitrophenyl of advanced oxidation or catalyzed oxidation limited; Adopt Powdered Activated Carbon to remove that oil of mirbane easily causes the obstruction in filter tank in the former water in filtration process, and that Powdered Activated Carbon has is floating in water, can not be fully effectively contacts with oil of mirbane in the former water, removal efficient is low.
Summary of the invention
The present invention removes in order to solve the existing GAC of employing that oil of mirbane relatively lags behind in the former water, and the residence time of water in filter bed is very short, so be difficult to the effective removal to oil of mirbane in the former water, has the GAC periodic replacement simultaneously, poor operability; Adopt the method for advanced oxidation, because nitro is very stable functional group, the resistance of oxidation that contains substituent phenyl ring is stronger; The oil of mirbane that adopts Powdered Activated Carbon to remove in the former water easily causes the obstruction in filter tank in filtration process, and that Powdered Activated Carbon has in water is floating, can not fully effectively remove the problem of the oil of mirbane in the former water, provide a kind of method that adopts Powdered Activated Carbon and coagulating agent to remove oil of mirbane in the former water, the concrete technical scheme that addresses the above problem:
It is as follows that the present invention adopts Powdered Activated Carbon and coagulating agent to remove the step of the method for oil of mirbane in the former water:
Step 1, finished product wooden powder gac water is made the suspension wooden powder gac emulsion of homogeneous, adding wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add polymeric ferric aluminum (PAFC) coagulating agent behind pressure stabilizing well and before the reaction tank, the dosage of coagulating agent is 40～80mg/L;
Step 3, wooden powder's gac emulsion mixed with former water and import in the hydraulic pipe-line with flow, wooden powder's gac and former water duration of contact of flowing is 2～3h;
Step 4, mixed water promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L after reaction tank, settling tank, sand filter and sterilization.
It is as follows that the present invention adopts Powdered Activated Carbon and coagulating agent to remove the step of the other method of oil of mirbane in the former water:
Step 1, finished product wooden powder gac water is made the suspension wooden powder gac emulsion of homogeneous, adding wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add FeCl behind pressure stabilizing well and before the reaction tank
3Coagulating agent, the dosage of coagulating agent are 40～80mg/L;
Step 3, wooden powder's gac emulsion mixed with former water and import in the hydraulic pipe-line with flow, wooden powder's gac and former water duration of contact of flowing is 2～3h;
Step 4, mixed water promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L after reaction tank, settling tank, sand filter and sterilization.
The present invention can effectively remove the oil of mirbane (clearance of oil of mirbane is more than 99.9% in the former water) in the former water, the filter tank of having avoided the Powdered Activated Carbon after the absorption to cause in filtration process is simultaneously stopped up or is penetrated and has floating residual in water outlet, thereby guarantee the qualified of effluent water quality index, have the incomparable superiority of existing technology; (nitrobenzene of water outlet is 0.002～0.006mg/L in that higher guarantee has been arranged aspect the water supply quality security than existing pre-throwing chlorine technology to adopt the water technology of throwing PAC in advance, well below national drinking water standard), strengthened in the water permanganate index simultaneously to the removal effect of aromatics, natural organic substance (NOM) and disinfection byproduct (DBP) (DBPs) precursor, made the water quality of water outlet be more suitable for the people and drink.
Embodiment
Embodiment one: the step of present embodiment method is as follows:
Step 1, with finished product wooden powder activated carbon granule, particulate order number is 150～250 orders, water is made the suspension wooden powder gac emulsion of homogeneous, adopting measuring apparatus to add wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add polymeric ferric aluminum (PAFC) coagulating agent behind pressure stabilizing well and before the reaction tank, the dosage of coagulating agent is 40～80mg/L; Coagulating agent is beneficial to the formation of flco as the skeleton of coagulation flco, and wooden powder's gac is fully contacted with oil of mirbane in the water, reaches the purpose of oil of mirbane in the abundant planar water.
Step 3, wooden powder's gac emulsion and Yuan Shui be mixed in the hydraulic pipe-line together flow, wooden powder's gac and former water mobile duration of contact is 2～3h;
Step 4, with wooden powder's mixed water of gac emulsion after reaction tank, settling tank, sand filter and sterilization, promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L.
The gac dosage 20～80mg/L of wooden powder is the value of the adding scope that nitrobenzene exceeds 5～50 times the scope of national drinking water standard value upper limit 0.017mg/L in the former water.
Embodiment two: the difference of present embodiment and embodiment one is when nitrobenzene in the former water exceeds 5 times of national drinking water standard value upper limit 0.017mg/L, step 1, and getting wooden powder's gac content is the emulsion of 20mg/L; Step 2, the dosage of polymeric ferric aluminum (PAFC) is 50mg/L; Step 3, wooden powder's gac and former water duration of contact are 3h.Other step is identical with embodiment one.
Embodiment three: the difference of present embodiment and embodiment one is when nitrobenzene exceeds 20 times of national drinking water standard value upper limit 0.017mg/L in the former water, step 1, and getting wooden powder's gac content is the emulsion of 40mg/L; Step 2, the dosage of polymeric ferric aluminum (PAFC) coagulating agent is 60mg/L; Step 3, wooden powder's gac and former water duration of contact are 2.5h.Other step is identical with embodiment one.
Embodiment four: the difference of present embodiment and embodiment one is when nitrobenzene exceeds 50 times of national drinking water standard value upper limit 0.017mg/L in the former water, step 1, and getting wooden powder's gac content is the emulsion of 70mg/L; Step 2, the dosage of polymeric ferric aluminum (PAFC) is 70mg/L; Step 3, wooden powder's gac and former water duration of contact are 2h.Other step is identical with embodiment one.
Embodiment five: the step of present embodiment method is as follows:
Step 1, with finished product wooden powder activated carbon granule, particulate order number is 150～250 orders, water is made the suspension wooden powder gac emulsion of homogeneous, adopting measuring apparatus to add wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add FeCl behind pressure stabilizing well and before the reaction tank
3Coagulating agent, the dosage of coagulating agent are 40～80mg/L; Coagulating agent is beneficial to the formation of flco as the skeleton of coagulation flco, and wooden powder's gac is fully contacted with oil of mirbane in the water, reaches the purpose of oil of mirbane in the abundant planar water.
Step 3, wooden powder's gac emulsion and Yuan Shui be mixed in the hydraulic pipe-line together flow, wooden powder's gac and former water mobile duration of contact is 2～3h;
Step 4, with wooden powder's mixed water of gac emulsion after reaction tank, settling tank, sand filter and sterilization, promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L.
Embodiment six: the difference of present embodiment and embodiment five is when nitrobenzene in the former water exceeds 5 times of national drinking water standard value upper limit 0.017mg/L, step 1, and getting wooden powder's gac content is the emulsion of 20mg/L; Step 2, FeCl
3Dosage be 50mg/L; Step 3, wooden powder's gac and former water duration of contact are 3h.Other step is identical with embodiment five.
Embodiment seven: the difference of present embodiment and embodiment five is when nitrobenzene exceeds 20 times of national drinking water standard value upper limit 0.017mg/L in the former water, step 1, and getting wooden powder's gac content is the emulsion of 40mg/L; Step 2, FeCl
3The dosage of coagulating agent is 60mg/L; Step 3, wooden powder's gac and former water duration of contact are 2.5h.Other step is identical with embodiment five.
Embodiment eight: the difference of present embodiment and embodiment five is when nitrobenzene exceeds 50 times of national drinking water standard value upper limit 0.017mg/L in the former water, step 1, and getting wooden powder's gac content is the emulsion of 70mg/L; Step 2, FeCl
3Dosage be 70mg/L; Step 3, wooden powder's gac and former water duration of contact are 2h.Other step is identical with embodiment five.
Described PAC is commercial dry type PAC, adopt the wet type dosing method at getting water from water head site mouth place, utilize getting water from water head site mouth place to the time of delivery of water purification plant finish PAC in former water with the thorough mixing and the absorption of oil of mirbane, after the former water that adds PAC and coagulating agent enters reaction tank, PAC can be used as the skeleton of coagulation flco again, be beneficial to the formation of flco, adjusting consuming amount of concrete simultaneously is optimized coagulation condition, play enhanced coagulation jointly, the effect of absorption oil of mirbane is passed through follow-up precipitation (wooden powder's gac is removed through precipitation) again, water outlet behind filtration and the sterilizing part.
The dosage and the water outlet nitrobenzene of wooden powder's gac, coagulating agent under table one, the different oil of mirbane times of ultra standard
| Times of ultra standard (doubly) | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 |
| PAC dosage (mg/L) | 20 | 30 | 30 | 40 | 50 | 50 | 80 | 80 |
| Coagulant charging quantity (mg/L) | 40 | 50 | 50 | 50 | 60 | 60 | 70 | 80 |
| Post precipitation nitro phenenyl concentration (mg/L) | 0. 00 2 | 0.0 03 | 0.00 5 | 0.00 4 | 0.00 4 | 0.00 6 | 0.00 4 | 0.00 5 |
Claims (10)
1, adopt Powdered Activated Carbon and coagulating agent to remove the method for oil of mirbane in the former water, its characteristic is that the step of this method is as follows:
Step 1, finished product wooden powder gac water is made the suspension wooden powder gac emulsion of homogeneous, adding wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add polymeric ferric aluminum (PAFC) coagulating agent behind pressure stabilizing well and before the reaction tank, the dosage of coagulating agent is 40～80mg/L;
Step 3, wooden powder's gac emulsion mixed with former water and import in the hydraulic pipe-line with flow, wooden powder's gac and former water duration of contact of flowing is 2～3h;
Step 4, mixed water promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L after reaction tank, settling tank, sand filter and sterilization.
2, employing Powdered Activated Carbon according to claim 1 and coagulating agent are removed the method for oil of mirbane in the former water, and its characteristic is that the order number of wooden powder's activated carbon granule is 150～250 orders.
3, employing Powdered Activated Carbon according to claim 1 and 2 and coagulating agent are removed the method for oil of mirbane in the former water, and its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 20mg/L; Step 2, the dosage of polymeric ferric aluminum are 50mg/L; Step 3, wooden powder's gac and former water duration of contact are 3h.
4, employing Powdered Activated Carbon according to claim 1 and 2 and coagulating agent are removed the method for oil of mirbane in the former water, and its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 40mg/L; Step 2, the dosage of polymeric ferric aluminum coagulating agent are 60mg/L; Step 3, wooden powder's gac and former water duration of contact are 2.5h.
5, employing Powdered Activated Carbon according to claim 1 and 2 and coagulating agent are removed the method for oil of mirbane in the former water, and its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 70mg/L; Step 2, the dosage of polymeric ferric aluminum are 70mg/L; Step 3, wooden powder's gac and former water duration of contact are 2h.
6, adopt Powdered Activated Carbon and coagulating agent to remove the method for oil of mirbane in the former water, its characteristic is that the step of this method is as follows:
Step 1, finished product wooden powder gac water is made the suspension wooden powder gac emulsion of homogeneous, adding wooden powder's gac content to the intake place is the emulsion of 20～80mg/L;
Step 2, add FeCl behind pressure stabilizing well and before the reaction tank
3Coagulating agent, the dosage of coagulating agent are 40～80mg/L;
Step 3, wooden powder's gac emulsion mixed with former water and import in the hydraulic pipe-line with flow, wooden powder's gac and former water duration of contact of flowing is 2～3h;
Step 4, mixed water promptly obtain the water outlet that nitrobenzene is 0.002～0.006mg/L after reaction tank, settling tank, sand filter and sterilization.
7, employing Powdered Activated Carbon according to claim 6 and coagulating agent are removed the method for oil of mirbane in the former water, and its characteristic is that the order number of wooden powder's activated carbon granule is 150～250 orders.
8, remove the method for oil of mirbane in the former water according to claim 6 or 7 described employing Powdered Activated Carbons and coagulating agent, its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 20mg/L; Step 2, FeCl
3Dosage be 50mg/L; Step 3, wooden powder's gac and former water duration of contact are 3h.
9, remove the method for oil of mirbane in the former water according to claim 6 or 7 described employing Powdered Activated Carbons and coagulating agent, its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 40mg/L; Step 2, FeCl
3The dosage of coagulating agent is 60mg/L; Step 3, wooden powder's gac and former water duration of contact are 2.5h.
10, remove the method for oil of mirbane in the former water according to claim 6 or 7 described employing Powdered Activated Carbons and coagulating agent, its characteristic is step 1, and getting wooden powder's gac content is the emulsion of 70mg/L; Step 2, FeCl
3Dosage be 70mg/L; Step 3, wooden powder's gac and former water duration of contact are 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610151163 CN1994927A (en) | 2006-12-19 | 2006-12-19 | Method for removing nitrobenzene from original water adopting powder active carbon and coagulant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610151163 CN1994927A (en) | 2006-12-19 | 2006-12-19 | Method for removing nitrobenzene from original water adopting powder active carbon and coagulant |
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| CN1994927A true CN1994927A (en) | 2007-07-11 |
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| CN 200610151163 Pending CN1994927A (en) | 2006-12-19 | 2006-12-19 | Method for removing nitrobenzene from original water adopting powder active carbon and coagulant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040298A (en) * | 2010-11-17 | 2011-05-04 | 哈尔滨工业大学 | Water treatment method for reducing chlorpyrifos pollution |
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2006
- 2006-12-19 CN CN 200610151163 patent/CN1994927A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040298A (en) * | 2010-11-17 | 2011-05-04 | 哈尔滨工业大学 | Water treatment method for reducing chlorpyrifos pollution |
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