CN106882914A - The method for improving excess sludge of municipal sewage plant dewatering - Google Patents
The method for improving excess sludge of municipal sewage plant dewatering Download PDFInfo
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- CN106882914A CN106882914A CN201710119778.8A CN201710119778A CN106882914A CN 106882914 A CN106882914 A CN 106882914A CN 201710119778 A CN201710119778 A CN 201710119778A CN 106882914 A CN106882914 A CN 106882914A
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- Prior art keywords
- sludge
- excess sludge
- municipal sewage
- dewatering
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a kind of method of improvement excess sludge of municipal sewage plant dewatering, the pH value of the excess sludge that municipal sewage plant is produced is adjusted to 6.8 7.2, to adding CaTiO in excess sludge3Ionising radiation treatment is carried out to it afterwards.The present invention is using gamma-rays to CaTiO3The irradiation of nano material, and promote the carrying out of redox reaction, sludge flocculation structure is destroyed, macromolecular substances are decomposed in making sludge solid phase, and cause microorganism death in sludge, discharge internal junction Heshui, effective to improve excess sludge dewatering.
Description
Technical field
The present invention relates to environmental technology field, specifically a kind of improvement excess sludge of municipal sewage plant dewatering
Method.
Background technology
Excess sludge refers to from secondary sedimentation tank in activated Sludge System（Or settling zone）Activated sludge outside discharge system,
It is a kind of extremely complex heterogeneous body being made up of organic relic, microorganism, inorganic particle, colloid etc., because it contains greatly
The harmful substance effect on environment such as amount pathogenic microorganism, parasitic ovum and heavy metal greatly, need to be disposed properly.The master of excess sludge
It is moisture content high to want characteristic, up to more than 95%, content of organics is high, and is difficult to carry out separation of solid and liquid by sedimentation.Sludge takes off
Water is an extremely important link of whole sludge treatment technique, the purpose is to make solids enrichment, reduces sludge volume, is dirty
The final disposal of mud creates conditions.The dewatering of sludge directly influences sludge treatment cost and disposal effect, but uses
Relatively inexpensive dewater treatment mode can only also make the dehydrated sludge cake moisture content of sludge drop to 70%~85%.
γ irradiation techniques belong to a kind of emerging high-level oxidation technology, because with applied widely, reaction speed it is fast, do not produce
The features such as raw secondary pollution, received significant attention in environmental area.γ irradiation techniques produce hydroxyl using gamma-rays with water effect
The free radicals such as free radical, hydroperoxyl radical, aqueous electron, peroxide, because these free radicals have activity very high, it is easy to
Pollutant is had an effect and causes its decomposition, so as to reach the effect of Disposal of Contaminants.
Perovskite composite oxide CaTiO3 is that a kind of novel inorganic with specific physical properties and chemical property is non-
Metal material, good performance is shown in the many-side such as catalysis, storage, sensing, light absorbs.There is the electromagnetism of uniqueness due to it
Property and redox catalysis activity, it is widely paid close attention in photocatalysis field.
The content of the invention
The present invention is in order to solve problem of the prior art, there is provided one kind improves excess sludge of municipal sewage plant dehydration
The method of performance, using gamma-rays to CaTiO3The irradiation of nano material, and promote the carrying out of redox reaction, destroy sludge
Flocculation structure, macromolecular substances are decomposed in making sludge solid phase, and cause microorganism death in sludge, discharge internal junction Heshui,
It is effective to improve excess sludge dewatering.
The present invention provide method be：The pH value of the excess sludge that municipal sewage plant is produced is adjusted to 6.8-7.2,
To the CaTiO that 0.2g/l is added in excess sludge3, ionising radiation treatment is then carried out to it, exposure time is 2-5h.
Described ionising radiation uses the gamma emitter of Co-60 or Cs-137, and its activity is more than 100,000 Curie, absorbed dose of radiation
Should be greater than 3kGy.
Described CaTiO3Material is the solid powder of a diameter of 10nm.
Beneficial effect of the present invention is：Due to there is certain improvement in itself using gamma-ray radiation method treatment excess sludge
The effect of dewatering performance of sludge, but its improvement is limited.It is remaining in gamma-ray irradiation further to improve dewatering performance of sludge
While sludge, appropriate CaTiO is added in excess sludge3Nano material, using gamma-rays to CaTiO3The spoke of nano material
According to, its catalysis activity is excited, and gamma-rays penetration capacity is strong, its catalysis activity can be effectively improved, because nano material compares table
Area is small, it is easy to dispersion and contact target thing, so as to promote the carrying out of redox reaction, destroys sludge flocculation structure, makes dirt
Macromolecular substances are decomposed in mud solid phase, and cause microorganism death in sludge, discharge internal junction Heshui, effective to improve remaining
Dewatering performance of sludge.
Brief description of the drawings
Fig. 1 is the sludge specific resistance changing trend diagram (pH=7.0) in embodiment 1.
Fig. 2 is the sludge specific resistance changing trend diagram (pH=10.0) in embodiment 2.
Fig. 3 is sludge specific resistance changing trend diagram (the addition CaTiO in embodiment 33Diameier is 100nm).
Fig. 4 is sludge specific resistance changing trend diagram (the addition CaTiO in embodiment 43The amount of powder is 0.05g).
Specific embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1：
（1）Excess sludge sample 1000mL is taken, its moisture content is 85%, and its sludge specific resistance is 5.864 × 1011M/kg, pH are
6.7, with the H of 1mol/L2SO4It is 7.0 that solution adjusts its pH with the NaOH solution of 10g/L, and 1000mL mud samples are sub-packed in into 10
Individual capacity for 100mL sealed sample bottle in, the bottled 100mL mud samples of each capacity.By 10 appearances equipped with mud sample
Measuring bottle is divided into the 1st group and the 2nd group, every group 5, wherein the 1st group of 5 volumetric flasks difference label 1-1,1-2,1-3,1-4 and 1-5
Number, wherein the 2nd group of 5 volumetric flasks difference label 2-1,2-2,2-3,2-4, No. 2-5.
（2）It is separately added into a diameter of 10nm's of 0.02g in the 1st group of 1-1,1-2,1-3,1-4 and 1-5 sample bottle
CaTiO3Powder, and concussion shakes up manually.
（3）1st group of sample and the 2nd group of sample are placed in into γ Radiation Centers duct carries out radiation treatment, wherein 1-1, No. 2-1
Volumetric flask exposure time is 2h, and 1-2,2-2 volumetric flask exposure time are 4h, and 1-3,2-3 volumetric flask exposure time are 6h, 1-
4th, 2-4 volumetric flasks exposure time is 8h, and 1-5,2-5 volumetric flask exposure time are 10h, and its radiation source is Co-60, and activity is
300000 Curie, central duct inner absorbent dose rate is 0.75kGy/h.
（4）The method filtered with level pressure determines the sludge specific resistance in irradiated latter 1st group and the 2nd pool-size bottle respectively.It is dirty
Mud resistivity is smaller, shows that dewatering performance of sludge is better.
（5）Measurement result is as shown in Figure 1.
Embodiment 2：
（1）Excess sludge sample 1000mL is taken, its moisture content is 85%, and its sludge specific resistance is 5.864 × 1011M/kg, pH are
6.7, with the H of 1mol/L2SO4It is 10.0 that solution adjusts its pH with the NaOH solution of 10g/L, and 1000mL mud samples are sub-packed in
10 capacity in the sealed sample bottle of 100mL, the bottled 100mL mud samples of each capacity.Mud sample is housed by 10
Volumetric flask is divided into the 1st group and the 2nd group, every group 5, wherein the 1st group of 5 volumetric flasks difference label 1-1,1-2,1-3,1-4 and 1-5
Number, wherein the 2nd group of 5 volumetric flasks difference label 2-1,2-2,2-3,2-4, No. 2-5.
（2）It is separately added into a diameter of 10nm's of 0.02g in the 1st group of 1-1,1-2,1-3,1-4 and 1-5 sample bottle
CaTiO3Powder, and concussion shakes up manually.
（3）1st group of sample and the 2nd group of sample are placed in into γ Radiation Centers duct carries out radiation treatment, wherein 1-1, No. 2-1
Volumetric flask exposure time is 2h, and 1-2,2-2 volumetric flask exposure time are 4h, and 1-3,2-3 volumetric flask exposure time are 6h, 1-
4th, 2-4 volumetric flasks exposure time is 8h, and 1-5,2-5 volumetric flask exposure time are 10h, and its radiation source is Co-60, and activity is
300000 Curie, central duct inner absorbent dose rate is 0.75kGy/h.
（4）The method filtered with level pressure determines the sludge specific resistance in irradiated latter 1st group and the 2nd pool-size bottle respectively.It is dirty
Mud resistivity is smaller, shows that dewatering performance of sludge is better.
（5）Measurement result as shown in Fig. 2 compared with Example 1, explanation higher with sludge specific resistance under radiation absorber amount
The ph values regulation of sludge is not so good as embodiment 1 to dewatering performance of sludge after 10 in embodiment 2.
Embodiment 3：
（1）Excess sludge sample 1000mL is taken, its moisture content is 85%, and its sludge specific resistance is 5.864 × 1011M/kg, pH are
6.7, with the H of 1mol/L2SO4It is 7.0 that solution adjusts its pH with the NaOH solution of 10g/L, and 1000mL mud samples are sub-packed in into 10
Individual capacity for 100mL sealed sample bottle in, the bottled 100mL mud samples of each capacity.By 10 appearances equipped with mud sample
Measuring bottle is divided into the 1st group and the 2nd group, every group 5, wherein the 1st group of 5 volumetric flasks difference label 1-1,1-2,1-3,1-4 and 1-5
Number, wherein the 2nd group of 5 volumetric flasks difference label 2-1,2-2,2-3,2-4, No. 2-5.
（2）It is separately added into a diameter of 100nm's of 0.02g in the 1st group of 1-1,1-2,1-3,1-4 and 1-5 sample bottle
CaTiO3Powder, and concussion shakes up manually.
（3）1st group of sample and the 2nd group of sample are placed in into γ Radiation Centers duct carries out radiation treatment, wherein 1-1, No. 2-1
Volumetric flask exposure time is 2h, and 1-2,2-2 volumetric flask exposure time are 4h, and 1-3,2-3 volumetric flask exposure time are 6h, 1-
4th, 2-4 volumetric flasks exposure time is 8h, and 1-5,2-5 volumetric flask exposure time are 10h, and its radiation source is Co-60, and activity is
300000 Curie, central duct inner absorbent dose rate is 0.75kGy/h.
（4）The method filtered with level pressure determines the sludge specific resistance in irradiated latter 1st group and the 2nd pool-size bottle respectively.It is dirty
Mud resistivity is smaller, shows that dewatering performance of sludge is better.
（5）Measurement result as shown in figure 3, compared with Example 1, explanation higher with sludge specific resistance under radiation absorber amount
The CaTiO that will be added in embodiment 33The diameter of powder from 10nm be changed to 100nm after dewatering performance of sludge be not so good as embodiment 1.
Embodiment 4：
（1）Excess sludge sample 1000mL is taken, its moisture content is 85%, and its sludge specific resistance is 5.864 × 1011M/kg, pH are
6.7, with the H of 1mol/L2SO4It is 7.0 that solution adjusts its pH with the NaOH solution of 10g/L, and 1000mL mud samples are sub-packed in into 10
Individual capacity for 100mL sealed sample bottle in, the bottled 100mL mud samples of each capacity.By 10 appearances equipped with mud sample
Measuring bottle is divided into the 1st group and the 2nd group, every group 5, wherein the 1st group of 5 volumetric flasks difference label 1-1,1-2,1-3,1-4 and 1-5
Number, wherein the 2nd group of 5 volumetric flasks difference label 2-1,2-2,2-3,2-4, No. 2-5.
（2）It is separately added into a diameter of 10nm's of 0.05g in the 1st group of 1-1,1-2,1-3,1-4 and 1-5 sample bottle
CaTiO3Powder, and concussion shakes up manually.
（3）1st group of sample and the 2nd group of sample are placed in into γ Radiation Centers duct carries out radiation treatment, wherein 1-1, No. 2-1
Volumetric flask exposure time is 2h, and 1-2,2-2 volumetric flask exposure time are 4h, and 1-3,2-3 volumetric flask exposure time are 6h, 1-
4th, 2-4 volumetric flasks exposure time is 8h, and 1-5,2-5 volumetric flask exposure time are 10h, and its radiation source is Co-60, and activity is
300000 Curie, central duct inner absorbent dose rate is 0.75kGy/h.
（4）The method filtered with level pressure determines the sludge specific resistance in irradiated latter 1st group and the 2nd pool-size bottle respectively.It is dirty
Mud resistivity is smaller, shows that dewatering performance of sludge is better.
（5）Measurement result is relatively low with sludge specific resistance under radiation absorber amount as shown in figure 4, compared with Example 1, but simultaneously
There is no obvious gain effect, illustrate CaTiO in embodiment 43Addition from 0.02g increase to 0.05g after sludge dewatering
Performance has no and is obviously improved.
Concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, some improvement can also be made, this
A little improvement also should be regarded as protection scope of the present invention.
Claims (3)
1. the method for a kind of improvement excess sludge of municipal sewage plant dewatering, it is characterised in that：By municipal sewage treatment
The pH value of the excess sludge that factory produces is adjusted to 6.8-7.2, to the CaTiO that 0.2g/l is added in excess sludge3, then it is entered
Row ionising radiation is processed, and exposure time is 2-5h.
2. the method for improvement excess sludge of municipal sewage plant according to claim 1 dewatering, it is characterised in that：
Described ionising radiation uses the gamma emitter of Co-60 or Cs-137, and its activity is more than 100,000 Curie, and absorbed dose of radiation should be greater than
3kGy。
3. the method for improvement excess sludge of municipal sewage plant according to claim 1 and 2 dewatering, its feature exists
In：Described CaTiO3Material is the solid powder of a diameter of 10nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710119778.8A CN106882914B (en) | 2017-03-02 | 2017-03-02 | Method for improving dehydration performance of excess sludge of municipal sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710119778.8A CN106882914B (en) | 2017-03-02 | 2017-03-02 | Method for improving dehydration performance of excess sludge of municipal sewage treatment plant |
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| Publication Number | Publication Date |
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| CN106882914A true CN106882914A (en) | 2017-06-23 |
| CN106882914B CN106882914B (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710119778.8A Active CN106882914B (en) | 2017-03-02 | 2017-03-02 | Method for improving dehydration performance of excess sludge of municipal sewage treatment plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716537A (en) * | 2017-09-08 | 2018-02-23 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of advanced oxidation reaction unit for purifying petroleum-contaminated soil |
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| CN102513108A (en) * | 2011-12-07 | 2012-06-27 | 江苏兆盛环保集团有限公司 | TiO2-carrying photoelectric catalyst for photoelectrocatalytic advanced treatment on sludge and method and device for TiO2-carrying photoelectric catalyst-based photoelectrocatalytic advanced treatment on sludge |
| CN102976583A (en) * | 2012-12-28 | 2013-03-20 | 江苏兆盛环保集团有限公司 | Deep dehydration treatment method for sludge of river courses and enclosed lakes |
| CN105217905A (en) * | 2015-09-30 | 2016-01-06 | 王立鹏 | The combined modified flyash of gamma-rays cracks the method for excess sludge |
-
2017
- 2017-03-02 CN CN201710119778.8A patent/CN106882914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513108A (en) * | 2011-12-07 | 2012-06-27 | 江苏兆盛环保集团有限公司 | TiO2-carrying photoelectric catalyst for photoelectrocatalytic advanced treatment on sludge and method and device for TiO2-carrying photoelectric catalyst-based photoelectrocatalytic advanced treatment on sludge |
| CN102976583A (en) * | 2012-12-28 | 2013-03-20 | 江苏兆盛环保集团有限公司 | Deep dehydration treatment method for sludge of river courses and enclosed lakes |
| CN105217905A (en) * | 2015-09-30 | 2016-01-06 | 王立鹏 | The combined modified flyash of gamma-rays cracks the method for excess sludge |
Non-Patent Citations (3)
| Title |
|---|
| Y.S.HUO 等: "《A polyacrylamide gel route to different-sized CaTiO3 nanoparticles and their photocatalytic activity for dye degradation》", 《J. SOL-GEL SCI. TECHNOL.》 * |
| 吴宇琦 等: "《γ-射线辐照法处理剩余活性污泥的试验研究》", 《南华大学学报（自然科学版）》 * |
| 裴立宅: "《高技术陶瓷材料》", 30 June 2015, 合肥工业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716537A (en) * | 2017-09-08 | 2018-02-23 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of advanced oxidation reaction unit for purifying petroleum-contaminated soil |
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| CN106882914B (en) | 2021-04-06 |
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