CN106396053A - Method for removing pollutants by using ultrasonic enhanced coagulation - Google Patents
Method for removing pollutants by using ultrasonic enhanced coagulation Download PDFInfo
- Publication number
- CN106396053A CN106396053A CN201610847206.7A CN201610847206A CN106396053A CN 106396053 A CN106396053 A CN 106396053A CN 201610847206 A CN201610847206 A CN 201610847206A CN 106396053 A CN106396053 A CN 106396053A
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- China
- Prior art keywords
- mud
- ultrasonic
- sludge
- intensified
- leachable
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for removing pollutants by using ultrasonic enhanced coagulation. Firstly, sludge in a water treatment plant is crushed with ultrasonic waves, then pollutants dissolved out of the sludge are removed, and sludge free of dissolved matter is obtained; finally, the sludge free of dissolved matter is mixed with raw water mixed with a coagulant and subjected to precipitation after multiple stages of flocculation treatment. With the adoption of the method, accumulated control on organic matter, heavy metals and microorganisms in a sludge reflux process can be realized, the water supply safety is improved, and the method is applicable to technical transformation and popularization and application of existing small and medium-sized water plants.
Description
Technical field
The invention belongs to technical field of drinking water treatment, particularly to a kind of organic using the removal of intensified by ultrasonic wave coagulation
The method of thing, heavy metal and pathogenic microorganisms.
Background technology
Purification plant sludge backflow as strengthening low turbidity source water routine coagulation effective technology, become Recent study with
Application focus, is also the important form of recycling sludge.During purification plant sludge reflux enhanced coagulation, mud is in technique stream
In journey, the time of staying is long, the poisonous and harmful substance such as each heavy metal species included in it and pathogenic microorganisms accumulate in process and
Concentrate, Process for Effluent water quality can be affected, increase the security risk of drinking water.And, current and mechanical shearing in reflux course
The lower mud flco of power effect can crush, and being wrapped in pollutant therein can be discharged in water, directly affect effluent quality.
Content of the invention：
In order to solve above-mentioned technical problem, the invention provides a kind of solve organic matter in purification plant sludge reflux technique,
The method of the accumulation problem of the poisonous and harmful substances such as pathogenic microorganisms, heavy metal, ensures chemical safety and the life of reflux technique
Thing security.
The technical solution adopted in the present invention is：A kind of method that utilization intensified by ultrasonic wave coagulation removes pollutant, it is special
Levy and be, comprise the following steps：
Step 1：Using ultrasonic disruption purification plant sludge；
Step 2：Remove dissolution pollutant in mud, obtain no leachable mud；
Step 3：No leachable mud is mixed with the raw water of dosing coagulant, precipitates after carrying out multistage flocculation treatment.
Preferably, the process that implements in step 1 is, take water treatment plant's mud sample in sonde-type reservoir, TSS is
1000～2000mg/L, ultrasonic acoustic density is 1.0～3.0W/mL, and action time is 10～20min, realizes purification plant sludge
Broken；In ultrasonic procedure, ultrasonic probe chaotropic face 2.0～2.5cm；For avoiding sludge settling to liquid storage trench bottom, magnetic force stirs
Mixing speed is 250～310rpm.The temperature of non-conditioning of mud and pH value in ultrasonic procedure.
Preferably, the mud after ultrasonication in step 1 removes dissolution pollutant after standing 8～12h.
Preferably, in step 3, water treatment plant's raw water quickly stirs mixing 1min with 300～350rpm first, adds coagulation
Agent；Then 1min is stirred with 120rpm, add the no leachable mud obtaining in step 2；Finally 15min is stirred with 50rpm, quiet
Put precipitation.
Preferably, in step 3, mud dosage determines according to water treatment plant's raw water quality and raw water flow, sludge reflux
Volume ratio is 4%～6%；Returned sludge adds in first order flocculated stage.
The present invention can largely improve effluent quality, reduces the load of subsequent processing units, improves water supply security
Property is it is adaptable to the technological transformation of existing middle-size and small-size water factory and popularization and application.Compared with original sludge reflux technique, the dirt of the present invention
Mud reflux technique capacity of resisting impact load is higher, can significantly reduce coagulant charging quantity, reduces sludge yield, reduces and runs into
This.
Brief description
Fig. 1：The flow chart of the embodiment of the present invention；
Fig. 2：The turbidity of the embodiment of the present invention and organic matter removal design sketch；
Fig. 3：Pathogenic microorganisms removal effect during the sludge reflux of the embodiment of the present invention；
Fig. 4：The removal effect of heavy metal during the sludge reflux of the embodiment of the present invention.
Specific embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with the accompanying drawings and embodiment is to this
Bright be described in further detail it will be appreciated that described herein enforcement example be merely to illustrate and explain the present invention, not
For limiting the present invention.
Ask for an interview Fig. 1, the method that a kind of utilization intensified by ultrasonic wave coagulation that the present invention provides removes pollutant, walk including following
Suddenly：
Step 1：Using ultrasonic disruption purification plant sludge；
Step 2：Remove dissolution pollutant in mud, obtain no leachable mud；
Step 3：No leachable mud is mixed with the raw water of dosing coagulant, precipitates after carrying out multistage flocculation treatment.
The present invention passes through laboratory a large amount of static test research, compares different ultrasonication conditions (acoustic density, ultrasonic
Time and sludge characteristics) under enhanced coagulation effect without leachable sludge reflux, finally with the lifting of water water quality after heavy for
The novelty of bright the method and superiority.Lift three examples and specific embodiment is described, but scope of the presently claimed invention is simultaneously
It is not limited to this.
Embodiment 1：
The characteristic of raw water and former mud is shown in Table 1.
Table 1 raw water and the characteristic of former mud
Using the method in the present invention, former for 100mL mud is put in glass container, ultrasonic acoustic density is 1.0～4.0W/
ML, effect 20min, in ultrasonic procedure, magnetic stirring apparatus rotating speed is 250rpm, does not have temperature and the pH value of conditioning of mud.Take 60mL
Ultrasonic mud standing 12h after remove supernatant.Carry out sludge reflux test using six static agitation, by 40mL no leachable
Ultrasonic mud adds to 120rpm stirring initial time.There is the coagulation effect such as accompanying drawing of dissolution mud and no leachable sludge reflux
Shown in 2, wherein coagulant FeCl3Dosage is 14.08mg/L.Contrast find, acoustic density be 3.0W/mL, ultrasonic time
During for 20min, the turbidity removal rate highest of the no ultrasonic sludge reflux of leachable, reach (63.02 ± 2.01) %, and close in acoustic energy
Spend for 1.0W/mL, ultrasonic time be 20min when, UV254Maximum with DOC clearance, respectively (51.44 ± 0.43) % and
(32.58±1.29).Now, the backflow depollution effect of no dissolution mud is substantially better than depollution effect during former mud backflow.
Embodiment 2：
With the raw water of certain water treatment plant and mud for test water sample and mud sample, with total Survival probability of bacteria and total coli group survival
Number is Testing index, assesses pathogenic microorganisms removal effect of the present invention.The temperature of test water sample is 18.5 DEG C, and pH value is 7.67,
Total bacteria and total coli group quantity are respectively 37800CFU/mL and 500000CFU/100mL.Total bacterium in test mud sample
It is respectively 38000CFU/mL and 3700000CFU/100mL with amount of total colibacillus, the TSS mass concentration of mud is 2.0g/L.
Using the method in the present invention, former for 100mL mud is put in glass container, ultrasonic acoustic density is 0.5～5.0W/
ML, effect 20min, in ultrasonic procedure, magnetic stirring apparatus rotating speed is 270rpm, does not have temperature and the pH value of conditioning of mud.Take 60mL
Ultrasonic mud standing 10h after remove supernatant.Carry out sludge reflux test using six static agitation, by 60mL no leachable
Ultrasonic mud adds to 120rpm stirring initial time.
Work as FeCl3When dosage is 17.2mg/L, return sludge ratio is 6%, now total Survival probability of bacteria and total coliform
Group's survival number is respectively -1.48 and 48600CFU/100mL.There is the pathogenic microorganisms of dissolution mud and no leachable sludge reflux
Effect is as shown in Figure 3.Contrast finds, when acoustic density is for 1.0W/mL, no leachable sludge reflux when heavy after total large intestine in water
Flora does not detect.After ultrasonication no leachable sludge reflux when, total bacterium and amount of total colibacillus can be controlled, raw
Thing security can be improved.
Embodiment 3：
The characteristic of raw water and former mud is shown in Table 2.
Table 2 raw water and the characteristic of former mud
Using the method in the present invention, former for 100mL mud is put in glass container, ultrasonic acoustic density is 1.0～4.0W/
ML, effect 10min, in ultrasonic procedure, magnetic stirring apparatus rotating speed is 300rpm, does not have temperature and the pH value of conditioning of mud.Take 60mL
Ultrasonic mud standing 12h after remove supernatant.Carry out sludge reflux test using six static agitation, by 60mL no leachable
Ultrasonic mud adds to 120rpm stirring initial time.There is the heavy metal Cd of dissolution mud and no leachable sludge reflux2+And Cu2 +As shown in figure 4, wherein coagulant FeCl3Dosage is 9.36mg/L.Contrast finds, the Cd in mud2+、Cu2+And Fe3+Mainly
Existed with nonionic state form, the content that it discharges to supernatant after ultrasonication is also less.Backflow have leachable and
No after leachable mud, to removal Cd2+、Cu2+And Fe3+Impact is less.Consider to remove Cd2+、Cu2+Removal effect, optimal acoustic energy
Density is 3.0W/mL.
The present invention can realize the accumulation to organic matter, heavy metal and microorganism and control, and ensure the chemistry peace of reflux technique
Full property and biological safety.
It should be appreciated that the part that this specification does not elaborate belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The restriction of invention patent protection scope, those of ordinary skill in the art, under the enlightenment of the present invention, is weighing without departing from the present invention
Profit requires under protected ambit, can also make replacement or deform, each fall within protection scope of the present invention, this
Bright scope is claimed should be defined by claims.
Claims (5)
1. a kind of method using intensified by ultrasonic wave coagulation removal pollutant is it is characterised in that comprise the following steps：
Step 1：Using ultrasonic disruption purification plant sludge；
Step 2：Remove dissolution pollutant in mud, obtain no leachable mud；
Step 3：No leachable mud is mixed with the raw water of dosing coagulant, precipitates after carrying out multistage flocculation treatment.
2. utilization intensified by ultrasonic wave coagulation according to claim 1 remove pollutant method it is characterised in that：Step 1
In the process that implements be to take water treatment plant's mud sample in sonde-type reservoir, TSS is 1000 ~ 2000mg/L, and ultrasonic acoustic energy is close
Spend for 1.0 ~ 3.0W/mL, action time is 10 ~ 20min, realize the broken of purification plant sludge；In ultrasonic procedure, ultrasonic probe from
Liquid level 2.0 ~ 2.5cm；For avoiding sludge settling to liquid storage trench bottom, magnetic stirring speed is 250 ~ 310rpm；In ultrasonic procedure
The temperature of non-conditioning of mud and pH value.
3. utilization intensified by ultrasonic wave coagulation according to claim 1 and 2 remove pollutant method it is characterised in that：Step
Mud after ultrasonication in rapid 1 removes dissolution pollutant after standing 8 ~ 12h.
4. utilization intensified by ultrasonic wave coagulation according to claim 1 remove pollutant method it is characterised in that：Step 3
In, water treatment plant's raw water quickly stirs mixing 1 min, dosing coagulant with 300 ~ 350rpm first；Then stir 1 with 120rpm
Min, adds the no leachable mud obtaining in step 2；Finally 15min is stirred with 50rpm, staticly settle.
5. utilization intensified by ultrasonic wave coagulation according to claim 1 or 4 remove pollutant method it is characterised in that：Step
In rapid 3, mud dosage determines according to water treatment plant's raw water quality and raw water flow, and sludge reflux volume ratio is 4% ~ 6%；Backflow is dirty
Mud adds in first order flocculated stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847206.7A CN106396053A (en) | 2016-09-21 | 2016-09-21 | Method for removing pollutants by using ultrasonic enhanced coagulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847206.7A CN106396053A (en) | 2016-09-21 | 2016-09-21 | Method for removing pollutants by using ultrasonic enhanced coagulation |
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| Publication Number | Publication Date |
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| CN106396053A true CN106396053A (en) | 2017-02-15 |
Family
ID=57996549
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847206.7A Pending CN106396053A (en) | 2016-09-21 | 2016-09-21 | Method for removing pollutants by using ultrasonic enhanced coagulation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040154988A1 (en) * | 2002-11-25 | 2004-08-12 | Sheets Richard G. | Animal waste effluent treatment |
| CN1765780A (en) * | 2005-09-14 | 2006-05-03 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| CN103102056A (en) * | 2013-03-13 | 2013-05-15 | 南京盟博环保科技有限公司 | Equipment for slushing and reducing sludge |
| CN103496832A (en) * | 2013-10-14 | 2014-01-08 | 北京工业大学 | Method of improving quality of settled water from sludge return process by ultrasonic wave |
| CN103864250A (en) * | 2014-03-13 | 2014-06-18 | 庄妍 | Treatment method of high-concentration organic wastewater |
-
2016
- 2016-09-21 CN CN201610847206.7A patent/CN106396053A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040154988A1 (en) * | 2002-11-25 | 2004-08-12 | Sheets Richard G. | Animal waste effluent treatment |
| CN1765780A (en) * | 2005-09-14 | 2006-05-03 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| CN103102056A (en) * | 2013-03-13 | 2013-05-15 | 南京盟博环保科技有限公司 | Equipment for slushing and reducing sludge |
| CN103496832A (en) * | 2013-10-14 | 2014-01-08 | 北京工业大学 | Method of improving quality of settled water from sludge return process by ultrasonic wave |
| CN103864250A (en) * | 2014-03-13 | 2014-06-18 | 庄妍 | Treatment method of high-concentration organic wastewater |
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Application publication date: 20170215 |
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