CN106186329A - A kind of method injecting adsorbing material control internal phosphorus release to bed mud - Google Patents
A kind of method injecting adsorbing material control internal phosphorus release to bed mud Download PDFInfo
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- CN106186329A CN106186329A CN201610758292.4A CN201610758292A CN106186329A CN 106186329 A CN106186329 A CN 106186329A CN 201610758292 A CN201610758292 A CN 201610758292A CN 106186329 A CN106186329 A CN 106186329A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The present invention provides a kind of and injects the method that adsorbing material controls internal phosphorus release to bed mud, and step is as follows: first will be dried after purification plant sludge ferrum screen filtration, then sieve after pulverizing, then calcination, then mix the calcium peroxide powder of 100 mesh, use blender mix homogeneously, obtain adsorbing material；Adsorbing material is injected to bed mud to be repaired, injection mode is as follows, as bed mud total phosphorus content≤500mg/kg, in terms of every square of bed mud, adsorption material stock column sample is injected at this bed mud planar central point, as bed mud total phosphorus content >=500mg/kg but during≤1000mg/kg, in terms of every square of bed mud, it is injected separately into adsorption material stock column sample at 4 points of this bed mud plane；As bed mud total phosphorus content >=1000mg/kg, in terms of every square of bed mud, it is injected separately into adsorption material stock column sample at 4 points of this bed mud plane, injects the degree of depth and be all as the criterion reaching background.The present invention can reach to suppress the purpose of internal phosphorus release.
Description
Technical field
The invention belongs to technical field of environmental management, particularly relate to one and release to bed mud injection adsorbing material control Endogenous Phosphorus
The method put.
Background technology
Phosphorus is the restrictive factor of phytoplankton growth, particularly during algal grown, needs substantial amounts of phosphorus.Along with sewage cuts
The construction of stream facility and the enforcement of watershed management plan, increasing water body has amputated the input of external source phosphorus, such as point
Source (sanitary sewage or industrial wastewater), source, face (agricultural run-off and rainfall runoff), river input etc..Therefore, water body is controlled
Middle algal grown, can be by the method for internal phosphorus release in suppression bed mud.This is also to be currently widely used for water remediation, control
The method of algae.
The control method of internal phosphorus release is broadly divided into in-situ method and dystopy method.Compared to dystopy method, in-situ method is not due to
Need subsequent processes, non-secondary pollution, so being used widely.And cladding process is be most widely used in method in position
Kind.Bed mud to be repaired is mainly completely cut off with overlying water by cladding process by covering material, blocks Endogenous Phosphorus and enters the way of overlying water
Footpath or reduction Endogenous Phosphorus enter the amount of overlying water.The covering material of application has physical property and chemical material 2 kinds, and the former is main
Including clean sand, stone, loess, geotextiles etc..It is more weak to the phosphorus absorbability of release that these cover material, substantially without
With phosphorus generation chemical reaction, the suppression of Phosphurus release is mainly completely cut off by it by physical property.The latter then be utilize cover material with
The character of phosphorus generation chemical reaction, adsorbs the phosphorus of release and fixes, and suppresses it to discharge.Application main material includes zeolite, changes
Property zeolite, modified calcite, quick lime, iron chloride modified kaolin etc..These cover material mainly by porous to phosphorus
Absorption, and react with phosphorus and be fixed, suppress it to discharge to overlying water.
In actual application, in order to obtain more preferable coverage effect, cover the usual particle diameter of material the most homogeneous, and often
Particle diameter is minimum, thus reaches the purpose of physical property isolation, but this exacerbates the internal anaerobic state of bed mud, causes in bed mud Interstitial Water
Phosphorus content is significantly increased, this also explosive release for phosphorus hide some dangers for.
Purification plant sludge is because it is rich in aluminum, ferrum plasma, and it is very strong, particularly through high temperature sintering to the absorbability of phosphorus
Afterwards, in bed mud, the metal ion such as aluminum, ferrum mainly exists with oxide form.Also can carry further additionally, add calper calcium peroxide
The adsorptivity of high novel absorption material and oxidisability, inject bed mud by this material, then increase aerobic Domain Volume in bed mud, and
Can the most persistently keep oxidisability.So can avoid the internal anaerobic zone volume of bed mud, reduce the possibility of internal phosphorus release
Property.Even if additionally, the phosphonium ion being discharged into bed mud Interstitial Water also can be adsorbed the ferrum in material, aluminum, calcium plasma are adsorbed.By
Inside bed mud, there is aerobic, anaerobic zone, in Interstitial Water transition process, constantly experience the replacement of anaerobic-aerobic state,
Can promote that the most again P form is converted to difficulty release state phosphorus by easily discharging state phosphorus, thus the control action that strengthening is to internal phosphorus release.
Therefore, based on clean water sludge transformation effect to bed mud internal medium rich in the metal ion such as aluminum, ferrum and injection method, the present invention
Arise at the historic moment.
Summary of the invention
Solve the technical problem that: cannot effectively control in Interstitial Water phosphorus content for existing cladding process and promote P form
The shortcoming converted, the present invention provides a kind of and injects the method that adsorbing material controls internal phosphorus release to bed mud, by bed mud
Inject special adsorbing material, it is to avoid bed mud is completely cut off with overlying water physical property by traditional cladding process, cause the internal anaerobism of bed mud,
And cause the shortcoming accumulated in Interstitial Water of phosphorus of release.
Technical scheme: a kind of method injecting adsorbing material control internal phosphorus release to bed mud, the step of the method is as follows:
The first step: first by purification plant sludge with after 1-2mm ferrum screen filtration, is dried 2-4h at 110 DEG C, then crosses 100 after pulverizing
Mesh sieve, the purification plant sludge after being processed；
Second step: the purification plant sludge calcination 2-4h at 550 DEG C after processing；
3rd step: mix the calcium peroxide powder of 100 mesh in the purification plant sludge after calcination, uses blender mix homogeneously,
To adsorbing material, wherein the purification plant sludge after calcination is (2-4) with the weight ratio of calcium peroxide powder: 1, the stirring of blender
Speed is 100rpm, and mixing time is 10min；
4th step: injecting adsorbing material to bed mud to be repaired, injection mode is as follows, 1. as bed mud total phosphorus content≤500mg/kg
Time, in terms of every square of bed mud, inject the adsorption material stock column sample of diameter 3-6cm at this bed mud planar central point, inject the degree of depth to reach
It is as the criterion to background；2. as bed mud total phosphorus content >=500mg/kg but during≤1000mg/kg, in terms of every square of bed mud, at this bed mud
4 points of plane are injected separately into the adsorption material stock column sample of diameter 3-6cm, inject the degree of depth and are as the criterion to reach background, each decanting point away from
Adjacent edge is 33.3cm；3. as bed mud total phosphorus content >=1000mg/kg, in terms of every square of bed mud, in this bed mud plane 4
Individual point is injected separately into the adsorption material stock column sample of diameter 8-12cm, injects the degree of depth and is as the criterion to reach background, and each decanting point is away from adjacent
While be 33.3cm.
First by after purification plant sludge 1mm ferrum screen filtration in the first step described above, at 110 DEG C, it is dried 3.5h.
Purification plant sludge calcination 3h at 550 DEG C after processing in second step described above.
In the 3rd step described above, purification plant sludge after calcination is 3:1 with the weight ratio of calcium peroxide powder.
Injecting adsorbing material to bed mud to be repaired in the 4th step described above, injection mode is as follows, 1. when bed mud total phosphorus
During content≤500mg/kg, in terms of every square of bed mud, inject the adsorption material stock column sample of diameter 5cm at this bed mud planar central point,
Inject the degree of depth to be as the criterion to reach background；2. as bed mud total phosphorus content >=500mg/kg but during≤1000mg/kg, with every square of end
Mud meter, is injected separately into the adsorption material stock column sample of diameter 5cm at 4 points of this bed mud plane, injects the degree of depth and is as the criterion to reach background, often
Individual decanting point is 33.3cm away from adjacent edge；3. as bed mud total phosphorus content >=1000mg/kg, in terms of every square of bed mud, at this
4 points of bed mud plane are injected separately into the adsorption material stock column sample of diameter 10cm, inject the degree of depth and are as the criterion to reach background, each decanting point
It is 33.3cm away from adjacent edge.
Beneficial effect: a kind of method injecting adsorbing material control internal phosphorus release to bed mud that the present invention provides, has
Following beneficial effect:
1. the material source that the present invention uses is extensive, it is simple to make, and the utilization of purification plant sludge achieves the resource of refuse
Change and utilize, solve the whereabouts problem of purification plant sludge；
2. the present invention is suitable for having controlled the enclosed type water body that external source is polluted, and is not affecting or is destroying water landscape function
In the case of, it is achieved water remediation；
3. use the method for the present invention to not only avoid tradition cladding process to be completely cut off with overlying water physical property by bed mud, cause bed mud
Internal anaerobism, and cause the shortcoming that the phosphorus of release accumulate in Interstitial Water, additionally, due to the adsorbing material of injection is rich in aluminum, ferrum
Deng metal-oxide and calper calcium peroxide, then the internal aerobic Domain Volume of bed mud is caused to increase, in Interstitial Water transition process, logical
Cross the replacement of aerobic-anaerobic state, promote P form to be converted to difficulty release state phosphorus by easily discharging state phosphorus；
4. the present invention also provides new approaches for the recycling of purification plant sludge.
Detailed description of the invention
The purification plant sludge that embodiment 1 uses obtains from Suzhou High-Tech Zone tap water company limited high and new technology industrial development zone Second Waterworks
?.
Embodiment 1
A kind of new method injecting special adsorbing material control internal phosphorus release to bed mud, the step of the method is as follows:
(1) purification plant sludge processes
Waterworks is dehydrated the mud (Al of postprecipitation2O3Content is 28.2%) screen out large particulate matter with 1mm ferrum screen cloth, then
Being placed in baking oven, at 110 DEG C of dry 3.5h, then pulverize, sieve with 100 eye mesh screens, the water treatment plant after being processed is dirty
Mud；Will process after clean water sludge be placed in Muffle furnace, calcination 3h at 550 DEG C, after calcination take out, be placed in drying basin cool extremely
Room temperature.
(2) preparation of adsorbing material
Take the clean water sludge 12kg after calcination, then take 4kg and cross the calcium peroxide powder of 100 eye mesh screens and be placed in organic container,
Rotating speed be 100rpm blender in stirring mixing 10min, obtain adsorbing material.
The adsorbing material utilizing embodiment 1 to prepare carries out the internal phosphorus release control of river course, Suzhou University of Science and Technology Shi Hu school district
System experiment, specifically comprises the following steps that
This section water body is serious rice-nutrient state (soluble phosphate content 0 ~ 0.58mg/L).Take undisturbed dirt
Dye bed mud (bed mud total phosphorus content 619mg/kg, the content of organic matter 5.9%), delivers to laboratory, is laid in 2 experimental provisions
(1m × 1m × 1m), respectively numbered ES1, ES2, laying depth is 50cm.For ES1, it is first determined 4 adsorbing materials inject
Point, each decanting point is 33.3cm away from adjacent edge, secondly, inserts the lucite tube of a diameter 5cm at each sampled point,
The degree of depth is gone directly (background of simulation bed mud) bottom experimental provision, then, extracts the bed mud in glass tubing out with vacuum pump, afterwards, adds
Enter the adsorbing material that 1.05kg is already prepared to, and be compacted；For ES2, by this weight of 4.2kg(and the adsorption material of addition in ES1
Material equivalent) adsorbing material cover on bed mud surface, cladding thickness about 7.6cm.Add fresh tap water, depth of water 30cm.Every day is examined
Survey soluble phosphate content in overlying water, within every 5 days, use soluble phosphate content in Ryzin sampler detector gap water.
In ES1 system, 20d, in water body, soluble phosphate content is 0.05mg/L；60d, soluble phosphate in water body
Content reaches 0.1mg/L；100d, in water body, dissolubility sulfate also only has 0.15mg/L.In ES2 system, 20d, molten in water body
Solving acid phosphate content is 0.07mg/L；60d, in water body, soluble phosphate content reaches 0.12mg/L；100d, molten in water body
Solution property sulfate is 0.20mg/L.It can be seen that adsorbing material uses the mode and the mode of covering injected, to internal phosphorus release
Inhibitory action similar, the former is also only to be slightly better than the latter.
But variation tendency and the content of soluble phosphate are the most entirely different in both Interstitial Waters.In ES1,20d, Interstitial Water
Middle soluble phosphate content is 0.15mg/L；60d, in Interstitial Water, soluble phosphate content is 0.20mg/L；100d, gap
In water, soluble phosphate content is 0.25mg/L.And in ES2,20d, in Interstitial Water, soluble phosphate content is 0.35mg/
L；60d, in Interstitial Water, soluble phosphate content is 0.60mg/L；100d, in Interstitial Water, soluble phosphate content is
1.25mg/L。
After 100d, bed mud is taken out, respectively different shape phosphorus content in detection bed mud, ferrum aluminum bound phosphorus in ES1 bed mud
Content substantially reduces, and calcium bound phosphorus content is significantly raised, and in ES2 bed mud, ferrum aluminum bound phosphorus slightly reduces, calcium combined state
Phosphorus content is held essentially constant.Although ferrum aluminum bound phosphorus all decreases in ES1 and ES2, but contains according to calcium bound phosphorus
Amount is it can be seen that the ferrum aluminum bound phosphorus reduced in ES1 is to be converted into calcium bound phosphorus, and in ES2, the ferrum aluminum of reduction combines
State phosphorus does not the most change into calcium bound phosphorus, but enters Interstitial Water with the form of soluble phosphate.
Contrast finds, adsorbing material use the mode injected inhibit well in bed mud phosphorus to the release of Interstitial Water, from
And avoid phosphorus in Interstitial Water and migrate to overlying water under Concentraton gradient effect, just the opposite, under coverage mode, in bed mud, phosphorus is big
Amount is discharged in Interstitial Water, owing to bed mud is coated with adsorbing material, so inhibiting its migration to overlying water.Therefore, although
Cladding process the most preferably inhibits soluble phosphate content in overlying water, but owing to its Interstitial Water have accumulated the molten of high concentration
Solve acid phosphate, cause bed mud to there is the danger of burst release phosphorus.On long terms, injection method is more beneficial for controlling for a long time phosphorus.
Above the embodiment of the present invention is described in detail, for one of ordinary skill in the art, according to the present invention
The thought of embodiment, the most all will change, and in sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (5)
1. the method injecting adsorbing material control internal phosphorus release to bed mud, it is characterised in that the step of the method is as follows:
The first step: first by purification plant sludge with after 1-2mm ferrum screen filtration, is dried 2-4h at 110 DEG C, then crosses 100 after pulverizing
Mesh sieve, the purification plant sludge after being processed；
Second step: the purification plant sludge calcination 2-4h at 550 DEG C after processing；
3rd step: mix the calcium peroxide powder of 100 mesh in the purification plant sludge after calcination, uses blender mix homogeneously,
To adsorbing material, wherein the purification plant sludge after calcination is (2-4) with the weight ratio of calcium peroxide powder: 1, the stirring of blender
Speed is 100rpm, and mixing time is 10min；
4th step: injecting adsorbing material to bed mud to be repaired, injection mode is as follows, 1. as bed mud total phosphorus content≤500mg/kg
Time, in terms of every square of bed mud, inject the adsorption material stock column sample of diameter 3-6cm at this bed mud planar central point, inject the degree of depth to reach
It is as the criterion to background；2. as bed mud total phosphorus content >=500mg/kg but during≤1000mg/kg, in terms of every square of bed mud, at this bed mud
4 points of plane are injected separately into the adsorption material stock column sample of diameter 3-6cm, inject the degree of depth and are as the criterion to reach background, each decanting point away from
Adjacent edge is 33.3cm；3. as bed mud total phosphorus content >=1000mg/kg, in terms of every square of bed mud, in this bed mud plane 4
Individual point is injected separately into the adsorption material stock column sample of diameter 8-12cm, injects the degree of depth and is as the criterion to reach background, and each decanting point is away from adjacent
While be 33.3cm.
A kind of method injecting adsorbing material control internal phosphorus release to bed mud the most according to claim 1, its feature exists
In: in the described first step first by purification plant sludge 1mm ferrum screen filtration after, at 110 DEG C be dried 3.5h.
A kind of method injecting adsorbing material control internal phosphorus release to bed mud the most according to claim 1, its feature exists
In: the purification plant sludge calcination 3h at 550 DEG C after processing in described second step.
A kind of method injecting adsorbing material control internal phosphorus release to bed mud the most according to claim 1, its feature exists
In: in described 3rd step, purification plant sludge after calcination is 3:1 with the weight ratio of calcium peroxide powder.
A kind of method injecting adsorbing material control internal phosphorus release to bed mud the most according to claim 1, its feature exists
In: in described 4th step to bed mud to be repaired inject adsorbing material, injection mode is as follows, 1. when bed mud total phosphorus content≤
During 500mg/kg, in terms of every square of bed mud, inject the adsorption material stock column sample of diameter 5cm at this bed mud planar central point, inject deep
Spend and be as the criterion reaching background；2. as bed mud total phosphorus content >=500mg/kg but during≤1000mg/kg, in terms of every square of bed mud,
4 points of this bed mud plane are injected separately into the adsorption material stock column sample of diameter 5cm, inject the degree of depth and are as the criterion to reach background, each injection
Point is 33.3cm away from adjacent edge；3., as bed mud total phosphorus content >=1000mg/kg, in terms of every square of bed mud, put down at this bed mud
4, face point is injected separately into the adsorption material stock column sample of diameter 10cm, injects the degree of depth and is as the criterion to reach background, and each decanting point is away from adjacent
While be 33.3cm.
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Cited By (3)
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| CN107285583A (en) * | 2017-08-07 | 2017-10-24 | 深圳市海源能源科技有限公司 | A kind of sludge treatment technique based on carbon source reuse |
| CN109607664A (en) * | 2018-12-20 | 2019-04-12 | 苏州科技大学 | A kind of material and preparation method thereof of quick elimination black and odorous water |
| CN114291986A (en) * | 2021-12-27 | 2022-04-08 | 华侨大学 | Preparation method of active covering plate for synchronously controlling release of nitrogen and phosphorus in sediment |
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| CN106186329B (en) | 2019-07-12 |
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