CN103755114B - Concentrating and phosphorus removing method for excess sludge - Google Patents
Concentrating and phosphorus removing method for excess sludge Download PDFInfo
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- CN103755114B CN103755114B CN201410060605.XA CN201410060605A CN103755114B CN 103755114 B CN103755114 B CN 103755114B CN 201410060605 A CN201410060605 A CN 201410060605A CN 103755114 B CN103755114 B CN 103755114B
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- sludge
- excess sludge
- concentrate
- clear water
- phosphorus
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Abstract
The invention discloses a concentrating and phosphorus removing method for excess sludge. The method comprises the following steps: (1) taking appropriate excess sludge mixed liquor to be processed, and determining sludge concentration and the content of phosphorus in clear water; (2) putting the excess sludge to be processed and a mixed concentrating agent into a stirring device for stirring at the sped of 300-330r/min; after uniformly stirring, transferring to a concentrating machine for concentrating to obtain concentrated sludge with the concentration of 40-50g/L, wherein the content of phosphorus in the clear water drained after concentration is smaller than 1mg/L. Compared with the gravity concentration method, the concentrating and phosphorus removing method for the excess sludge has small occupied area and short time. Compared with a mechanical concentrating method, the occupied area is small, the price of drugs is low, and the operation is simple and fast. The content of phosphorus in the clear water drained after concentration is smaller than 1mg/L, and the clear water returning a processing system has a small influence on the phosphorus removal of an integral processing system.
Description
Technical field
The present invention relates to a kind for the treatment of process of mud, particularly relate to a kind of concentrate phosphorus removing method for excess sludge.
Background technology
Carry out in Aerobic at sewage, the organism of 1/3rd is degraded, 2/3rds are synthesized as microorganism---i.e. active sludge, active sludge will constantly increase with system cloud gray model, for the balance of keeping system active sludge, constantly amount of activated mud need be discharged system as excess sludge.Excess sludge flows to second pond from aeration tank and precipitates, and a mud part for precipitation is back to aeration tank, and a part of discharge system, concentration is 7-9 grams per liter, and water ratio is greater than 99%.For reducing the volume of excess sludge, need concentrated to reduce water ratio further, concentration method has gravity concentration, floatation thickening and mechanical thickening, gravity concentration tank volume is large, and the time is long, and floatation thickening equipment is complicated, troublesome poeration, costly, mechanical thickening needs adding medicine cost high, and efficiency is low, because the concentrate time is long, the anaerobism time of excess sludge is long, and mud release phosphorus is just many, and in the clear water got rid of after making concentrate, the content of phosphorus is just high, retrieval system is very large on system dephosphorization impact, and this is the main drawback of above three kinds of condensing mode.
Summary of the invention
The technical problem to be solved in the present invention is to provide the concentrate phosphorus removing method of a kind of cost excess sludge low, easy and simple to handle.
A concentrate phosphorus removing method for excess sludge, comprises the steps:
(1) phosphorus content in the sludge concentration in pending excess sludge and the clear water after sludge dewatering is detected: get excess sludge mixed solution pending in right amount, measure sludge concentration by national standard method (GB/T11901-1989) and measure the content of phosphorus in de-clear water by national standard method (GB11893-89), calculating the sludge concentration in pending excess sludge and the phosphorus content in clear water;
(2) pending excess sludge is placed in whipping appts together with the agent of compound concentrate and stirs 300-330r/min, concentrate in concentrating machine is transferred to after stirring, obtain the enrichment mud that concentration is 40 ~ 50 grams per liters, in the clear water of discharging after described enrichment, phosphorus content is less than 1mg/L;
The chemical equation of dephosphorization with ferric salt: Fe
3++ PO
4 3-→ FePO
4; Reacted tertiary iron phosphate is deposited in mud;
Wherein, the agent of described compound concentrate is molysite and Fe
3o
4or aluminium salt and Fe
3o
4mixture, described Fe
3o
4addition be 0.4 times that need process dewatered sludge weight in excess sludge, the weight of described dewatered sludge calculates according to the amount of the excess sludge of sludge concentration and actual treatment, and the addition of described molysite or aluminium salt is the phosphorus complete reaction just and in the clear water of discharging after enrichment; Described molysite or aluminium salt and excess sludge adhere to evenly, and described concentrating machine adopts the method for Magneto separate to carry out concentrate.
The concentrate phosphorus removing method of excess sludge of the present invention, wherein said molysite is Fe
2(SO
4)
3or ferrous sulfate, described aluminium salt is Tai-Ace S 150 or polymerize aluminum chloride.
The concentrate phosphorus removing method of excess sludge of the present invention, wherein said concentrating machine comprises: described concentrating machine comprises: housing, is provided with the through hole, clear water relief outlet and the enrichment sludge outlet that pass for sludge carrier pipe road, support, be placed in described housing, the bottom of described support is the cell body holding mud, sludge inlet is provided with bottom it, be connected with described sludge carrier pipe road, one end of described frame upper is provided with magnetic roller, the other end is support bar, connected by annulus rubber cincture between described magnetic roller and described support bar, described magnetic roller comprises axle portion and column magnetic roller main body, described column magnetic roller main body comprises permanent magnet, described axle portion is connected with drive unit, in described concentrating machine concentrate process, described drive unit drives described magnetic roller to rotate with the rotating speed of 15 ~ 30r/min, described magnetic roller drives described ring-shaped rubber Tape movement and carries mud, the radial cross-section of described cell body is semicircle, coaxially arranges, the large 15-25mm of the radius of magnetic roller described in its radius ratio with described magnetic roller.
The concentrate phosphorus removing method of excess sludge of the present invention, the excess sludge of wherein said excess sludge to be the concentration of discharging in aeration tank be 2 ~ 5 grams per liters.
The concentrate phosphorus removing method of excess sludge of the present invention, wherein said excess sludge is to discharge from aeration tank and concentration through second pond discharge is the excess sludge of 8 ~ 9 grams per liters.
The concentrate phosphorus removing method of excess sludge of the present invention, enrichment mud and clear water is obtained after wherein said excess sludge concentrate, described clear water discharge is got back in preliminary sedimentation tank, and a described enrichment mud part returns to aeration tank, and a part enters centrifuge dehydration system and carries out the process of continuation deep dehydration.
The concentrate phosphorus removing method of excess sludge of the present invention, wherein on described sludge carrier pipe road, be provided with sludge pump, described support is made up of Bai Gang, and described drive unit is motor, and described whipping appts is static mixer.
The principle of the method for the invention: the compound that the present invention utilizes energy and mud adsorbs, throwing out also can be magnetically attracted, utilize magneticaction to make the mud displacement of Adsorption and flocculation, assemble, stick on magnetic drum and be separated with water, utilize mechanical effect that adhesion mud is peeled off, adopt the method that sludge concentration can be made from 2-4 grams per liter concentrate to 40-50 grams per liter.Therefore, the mud of discharging from aeration tank directly can add without precipitation and enters equipment of the present invention (concentrating machine) after this medicament mixes and carry out concentrate, and concentrate rear portion is back to aeration tank, and a part becomes excess sludge and goes centrifuge dehydration; Also the excess sludge of second pond discharge can add and enter equipment of the present invention (concentrating machine) after this compound mixes and carry out concentrate, no matter sludge concentration height before entering concentrating machine, add after hybrid reaction is carried out in the agent of this compound concentrate in dewatered sludge ratio and send into concentrating machine, the sludge concentration that concentrating machine is discharged all can reach 40-50 grams per liter.First the phosphorus content in clear water after sludge concentration and dehydration is detected, according to dewatered sludge weight and the content determination Z 250 of phosphorus and the ratio of ferric sulfate, by dewatered sludge weight 1; 0.4 adds Z 250, after being uniformly mixed, send into the magnetic concentrating machine of band, with the mud quick adsorption be mixed evenly with the agent of this compound concentrate on string rubber, a part is transported on centrifuge through string rubber carries out deep dehydration, a part is back to aeration tank, and the clear water discharged after concentrate is discharged into preliminary sedimentation tank and enters Sewage treatment systems.
The concentrate phosphorus removing method difference from prior art of excess sludge of the present invention is:
The concentrate phosphorus removing method of excess sludge of the present invention, floor space is little compared with gravity concentration method, time is short, take up an area little compared with mechanical thickening method, medicament price is low, simple and quick, the clear water phosphorus content of discharging after enrichment is low, returns the removal impact of aeration tank on bulk treatment system phosphorus little.
If the mud of discharging from aeration tank directly carries out concentrate, concentrate rear section returns to aeration tank, part goes centrifuge dehydration, and the sludge concentration returning to aeration tank is high, does not affect microbic activity, improve processing efficiency, reduce backflow mud amount, reach energy efficiency, remove the mud of centrifuge dehydration, because concentration is high, centrifuge can efficiently run by fully loaded.
Be described further below in conjunction with the concentrate phosphorus removing method of accompanying drawing to excess sludge of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the concentrate phosphorus removing method of excess sludge of the present invention;
Fig. 2 is the internal structure schematic diagram of concentrating machine of the present invention;
Fig. 3 is the structural representation under concentrating machine of the present invention and peripheral equipment combined situation.
Embodiment
Embodiment 1
As shown in Figure 1, the concentrate phosphorus removing method of excess sludge of the present invention comprises the steps:
(1) active sludge intermixture of pending excess sludge to be the concentration of discharging from aeration tank be 2 ~ 5 grams per liters, detect the phosphorus content in the sludge concentration in pending excess sludge and the clear water after sludge dewatering: get excess sludge mixed solution pending in right amount, measure sludge concentration by national standard method (GB/T11901-1989) and measure the content of phosphorus in de-clear water by national standard method (GB11893-89), calculating the sludge concentration in pending excess sludge and the phosphorus content in clear water;
(2) pending excess sludge is placed in whipping appts together with the agent of compound concentrate and stirs 300-330r/min, concentrate in concentrating machine is transferred to after stirring, obtain the enrichment mud that concentration is 40 ~ 50 grams per liters, in the clear water of discharging after enrichment, phosphorus content is less than 1mg/L;
The agent of compound concentrate is molysite and Fe
3o
4mixture, Fe
3o
4addition be 0.4 times that need process dewatered sludge weight in excess sludge, the weight of dewatered sludge calculates according to the amount of the excess sludge of sludge concentration and actual treatment, and the addition of molysite is the phosphorus complete reaction just and in the clear water of discharging after enrichment; Molysite and excess sludge adhere to evenly, and concentrating machine adopts the method for Magneto separate to carry out concentrate.Molysite is ferric sulfate or ferrous sulfate, and reactant precipitation is stayed in mud.
As shown in Figures 2 and 3, concentrating machine comprises: housing (not shown), is provided with the through hole, clear water relief outlet and the enrichment sludge outlet that pass for sludge carrier pipe road 7, support 1, be placed in housing, the bottom of support 1 is the cell body 2 holding mud, sludge inlet 9 is provided with bottom it, be connected with sludge carrier pipe road 7, the one end on support 1 top is provided with magnetic roller 3, the other end is support bar 4, connected by annulus rubber cincture 5 between magnetic roller 3 and support bar 4, magnetic roller 3 comprises axle portion and column magnetic roller main body, column magnetic roller main body comprises permanent magnet, axle portion is connected with drive unit 6, in concentrating machine concentrate process, drive unit 6 drives magnetic roller 3 to rotate with the rotating speed of 15 ~ 30r/min, magnetic roller 3 drives annulus rubber cincture 5 move and carry mud, the radial cross-section of cell body 2 is semicircle, and coaxially arrange with magnetic roller 3, namely the shape of described cell body 4 is identical with the half of described magnetic roller, size a little than magnetic roller more greatly, the large 15-25mm of radius of the radius ratio magnetic roller 3 of cell body 2.Sludge carrier pipe road 7 is provided with sludge pump 10, and support is made up of Bai Gang, and drive unit 6 is adjustable speed motor, and whipping appts is static mixer.
The working process of concentrating machine is: open switch, start sludge pump motor 8, the excess sludge adding the agent of compound concentrate enters in cell body 2 by sludge pump transfer line 7 and sludge inlet, magnetic roller 3 rotates sludge absorption on string rubber 5, concentrate is also delivered to enrichment sludge outlet, and the clear water after concentrate is discharged from clear water relief outlet.
The excess sludge of excess sludge to be the concentration of discharging in aeration tank be 2 ~ 5 grams per liters, enrichment mud and clear water is obtained after excess sludge concentrate, clear water discharge is got back in preliminary sedimentation tank, and an enrichment mud part returns to aeration tank, and a part enters centrifuge dehydration system and carries out the process of continuation deep dehydration.
The agent of compound concentrate and concentrating machine and dephosphorization are combined in the concentrate of the excess sludge being used in sewage disposal by of the present invention focusing on, reach energy-efficient effect, treatment effect is well a lot of compared with existing thickened sludge method, after concentrate, concentration reaches 40 ~ 50 grams per liters, adopt the inventive method, after concentrate, in clear water, phosphorus content is less than 1mg/L.
Embodiment 2
As shown in Figure 1, the concentrate phosphorus removing method of excess sludge of the present invention comprises the steps:
(1) pending excess sludge is to discharge from aeration tank and concentration through second pond discharge is the excess sludge of 8 ~ 9 grams per liters, detect the phosphorus content in the sludge concentration in pending excess sludge and the clear water after sludge dewatering: get excess sludge mixed solution pending in right amount, measure sludge concentration by national standard method (GB/T11901-1989) and measure the content of phosphorus in de-clear water by national standard method (GB11893-89), calculating the sludge concentration in pending excess sludge and the phosphorus content in clear water;
(2) pending excess sludge is placed in whipping appts together with the agent of compound concentrate and stirs 300-330r/min, concentrate in concentrating machine is transferred to after stirring, obtain the enrichment mud that concentration is 40 ~ 50 grams per liters, in the clear water of discharging after enrichment, phosphorus content is less than 1mg/L;
The agent of compound concentrate is aluminium salt and Fe
3o
4mixture, Fe
3o
4addition be 0.4 times that need process dewatered sludge weight in excess sludge, the weight of dewatered sludge calculates according to the amount of the excess sludge of sludge concentration and actual treatment, and the addition of aluminium salt is phosphorus (phosphorus that in concentrate process, anaerobism discharges) complete reaction just and in the clear water of discharging after enrichment and is deposited in concentrate mud; Compound and excess sludge adhere to evenly, and concentrating machine adopts the method for Magneto separate to carry out concentrate, and aluminium salt is Tai-Ace S 150 or polymerize aluminum chloride.
As shown in Figures 2 and 3, concentrating machine comprises: housing, is provided with the through hole, clear water relief outlet and the enrichment sludge outlet that pass for sludge carrier pipe road 7, support 1, be placed in housing, the bottom of support 1 is the cell body 2 holding mud, sludge inlet 9 is provided with bottom it, be connected with sludge carrier pipe road 7, the one end on support 1 top is provided with magnetic roller 3, the other end is support bar 4, connected by annulus rubber cincture 5 between magnetic roller 3 and support bar 4, magnetic roller 3 comprises axle portion and column magnetic roller main body, column magnetic roller main body comprises permanent magnet, axle portion is connected with drive unit 6, in concentrating machine concentrate process, drive unit 6 drives magnetic roller 3 to rotate with the rotating speed of 15 ~ 30r/min, magnetic roller 3 drives annulus rubber cincture 5 move and carry mud, the radial cross-section of cell body 2 is semicircle, coaxially arrange with magnetic roller 3, namely the shape of described cell body 4 is identical with the half of described magnetic roller, size a little than magnetic roller more greatly, the large 15-25mm of radius of the radius ratio magnetic roller 3 of cell body 2, the setting of this size can ensure the efficient work of concentrating machine, reaches again the object of saving material.Sludge carrier pipe road 7 is provided with sludge pump 10, and support is made up of Bai Gang, and drive unit 6 is adjustable speed motor, and whipping appts is static mixer.
Excess sludge is to discharge from aeration tank and concentration through second pond discharge is the excess sludge of 8 ~ 9 grams per liters, enrichment mud and clear water is obtained after excess sludge concentrate, clear water discharge is got back in preliminary sedimentation tank, an enrichment mud part returns to aeration tank, and a part enters centrifuge dehydration system and carries out the process of continuation deep dehydration.
The working process of concentrating machine is: open switch, start sludge pump 8 and motor, the excess sludge adding the agent of compound concentrate enters in cell body 2 by sludge carrier pipe road 7 and sludge inlet, magnetic roller 3 rotates sludge absorption on string rubber 5, concentrate is also delivered to enrichment sludge outlet, and the clear water after concentrate is discharged from clear water relief outlet.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (5)
1. a concentrate phosphorus removing method for excess sludge, is characterized in that: comprise the steps:
(1) get excess sludge mixed solution pending in right amount, measure the content of phosphorus in sludge concentration and de-clear water;
(2) pending excess sludge is placed in whipping appts together with the agent of compound concentrate and stirs 300-330r/min, concentrate in concentrating machine is transferred to after stirring, obtain the enrichment mud that concentration is 40 ~ 50 grams per liters, in the clear water of discharging after described enrichment, phosphorus content is less than 1mg/L;
Wherein, the agent of described compound concentrate is molysite and Fe
3o
4or aluminium salt and Fe
3o
4mixture, described Fe
3o
4addition be 0.4 times that need process dewatered sludge weight in excess sludge, the weight of described dewatered sludge calculates according to the amount of the excess sludge of sludge concentration and actual treatment, and the addition of described molysite or aluminium salt is the phosphorus complete reaction just and in the clear water of discharging after enrichment; Described molysite or aluminium salt and excess sludge adhere to evenly, and described concentrating machine adopts the method for Magneto separate to carry out concentrate;
Described molysite is Fe
2(SO
4)
3or ferrous sulfate, described aluminium salt is Tai-Ace S 150 or polymerize aluminum chloride;
Described concentrating machine comprises: housing, is provided with the through hole, clear water relief outlet and the enrichment sludge outlet that pass for sludge carrier pipe road (7), support (1), be placed in described housing, the bottom of described support (1) is the cell body (2) holding mud, sludge inlet (9) is provided with bottom it, be connected with described sludge carrier pipe road (7), the one end on described support (1) top is provided with magnetic roller (3), the other end is support bar (4), connected by annulus rubber cincture (5) between described magnetic roller (3) and described support bar (4), described magnetic roller (3) comprises axle portion and column magnetic roller main body, described column magnetic roller main body comprises permanent magnet, described axle portion is connected with drive unit (6), in described concentrating machine concentrate process, described drive unit (6) drives described magnetic roller (3) to rotate with the rotating speed of 15 ~ 30r/min, described magnetic roller (3) drives described annulus rubber cincture (5) move and carry mud, the radial cross-section of described cell body (2) is semicircle, coaxially arranges, the large 15-25mm of radius of magnetic roller (3) described in the radius ratio of described cell body (2) with described magnetic roller (3).
2. the concentrate phosphorus removing method of excess sludge according to claim 1, is characterized in that: the excess sludge of described excess sludge to be the concentration of discharging in aeration tank be 2 ~ 5 grams per liters.
3. the concentrate phosphorus removing method of excess sludge according to claim 2, is characterized in that: described excess sludge is to discharge from aeration tank and concentration through second pond discharge is the excess sludge of 8 ~ 9 grams per liters.
4. the concentrate phosphorus removing method of the excess sludge according to Claims 2 or 3, it is characterized in that: after described excess sludge concentrate, obtain enrichment mud and clear water, described clear water discharge is got back in preliminary sedimentation tank, a described enrichment mud part returns to aeration tank, and a part enters centrifuge dehydration system and carries out the process of continuation deep dehydration.
5. the concentrate phosphorus removing method of excess sludge according to claim 1, it is characterized in that: on described sludge carrier pipe road (7), be provided with sludge pump (8), described support is made up of Bai Gang, described drive unit (6) is motor, and described whipping appts is static mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060605.XA CN103755114B (en) | 2014-02-21 | 2014-02-21 | Concentrating and phosphorus removing method for excess sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060605.XA CN103755114B (en) | 2014-02-21 | 2014-02-21 | Concentrating and phosphorus removing method for excess sludge |
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| Publication Number | Publication Date |
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| CN103755114A CN103755114A (en) | 2014-04-30 |
| CN103755114B true CN103755114B (en) | 2015-07-08 |
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|---|---|---|---|
| CN201410060605.XA Expired - Fee Related CN103755114B (en) | 2014-02-21 | 2014-02-21 | Concentrating and phosphorus removing method for excess sludge |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601061B (en) * | 2015-12-16 | 2018-04-03 | 余元华 | A kind of not anti-molten processing method and processing device of the innoxious decrement of excess sludge broken wall |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1190490A (en) * | 1997-09-19 | 1999-04-06 | Mishima Kosan Co Ltd | Regeneration of oil-containing sludge |
| CN101125700A (en) * | 2007-08-17 | 2008-02-20 | 北京交通大学 | Magnetic dephosphorising agent, magnetic sephosphorising sewage treatment device and sephosphorising method thereof |
| CN101628770A (en) * | 2007-08-17 | 2010-01-20 | 北京交通大学 | Magnetically dephosphorizing sewage treatment device and dephosphorizing method thereof |
| CN101654238A (en) * | 2009-09-11 | 2010-02-24 | 华东理工大学 | Method for recovering phosphonium compound from phosphorous excess sludge of urban sewage treatment plant |
| CN101798166B (en) * | 2010-04-21 | 2011-12-28 | 中国船舶重工集团公司第七○二研究所 | Device and method for magnetic separation of underwater sludge |
| CN201678577U (en) * | 2010-04-21 | 2010-12-22 | 中国船舶重工集团公司第七○二研究所 | Underwater sludge magnetic separation treatment device |
| CN102329039A (en) * | 2011-08-25 | 2012-01-25 | 杭州银江环保科技有限公司 | Mud-water separation system |
| CN103204613B (en) * | 2013-04-12 | 2015-01-14 | 同济大学 | Method for extracting phosphorus in phosphorus containing chemical-biological mixed sludge |
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2014
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| CB03 | Change of inventor or designer information |
Inventor after: Wang Gang Inventor after: Su Hong Inventor after: Zhang Xiaojie Inventor before: Su Hong Inventor before: Zhang Xiaojie |
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Effective date of registration: 20180102 Address after: 264000 Shandong Province, Yantai city Laishan District No. 30 Jieaisilu Patentee after: YANTAI YIYUAN ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO.,LTD. Address before: 264005 Qingquan Road, Laishan District, Yantai, Shandong Province, No. 35 Patentee before: Yantai University |
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