CN109626794A - A kind of process of combined type sludge dewatering - Google Patents
A kind of process of combined type sludge dewatering Download PDFInfo
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- CN109626794A CN109626794A CN201910038311.XA CN201910038311A CN109626794A CN 109626794 A CN109626794 A CN 109626794A CN 201910038311 A CN201910038311 A CN 201910038311A CN 109626794 A CN109626794 A CN 109626794A
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- sludge
- combined type
- sludge dewatering
- treatment
- dewatering according
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The case where the purpose of the present invention is for moisture percentage in sewage sludge can not be further decreased by existing dewatering technology of mud, propose a kind of process of sludge dewatering, the dehydrating process combines PAC to the flocculation of sludge, polar water soluble small molecular alcohol compounds to the modifying function of protein, and destruction of the hydro-thermal process to cell membrane is combined, develop a kind of sludge dewatering treatment new process.The present invention, which has, uses PAC, methanol and hydro-thermal combined dehydration, and reagent additive amount is few, and process flow is simple, after being dehydrated, the advantages that moisture percentage in sewage sludge capable of being made to be down to 65% or less.
Description
Technical field
The present invention relates to sludge dewatering treatment technical fields, and in particular to a kind of process of combined type sludge dewatering.
Background technique
Treatment of Sludge becomes one of the research hotspot of water and field of waste water treatment because of its processing cost height.Dewatered sludge is
Essential cell process in Treatment of Sludge, liquid and solid efficiently separates the volume that can greatly reduce sludge in sludge
And ultimate cost.Sludge can be divided into supernatant, sludge, particle and Extracellular Polymers (EPS), be broadly divided into soluble E PS, pine
Dissipating bind closes EPS and the EPS that combines closely, the complex component of sludge, especially EPS, so that realizing that effective dehydrating effect is quite tired
It is difficult.
Before conventional mechanical dehydration, various pretreatments are carried out, such as heat treatment, microwave treatment and ultrasonication, and
Framework construction agent, acid, alkali, surfactant, oxidant and coagulant/flocculant are added, to change the property of sludge, is improved most
Whole dewatering.Man Si.In view of the cost and efficiency in practical operation, coagulation/flocculation is most common sludge conditioning method
One of, in the process, the small colloidal solid in sludge can form big flocculating body by charging neutrality and with bridge linking effect, thus
Improve precipitating.Improve the dehydration dewatering of dewatering rate and solid content.But that sludge can be made to be formed is small for coagulation/flocculation
Incompressible densification sludge cake, can not effectively compress LB-EPS structure, can not further decrease moisture percentage in sewage sludge.
Therefore, it is proposed that the method for aluminium polychloride (PAC), methanol and hydro-thermal Combined Treatment, it is de- that research improves sludge
Aqueous energy.Coagulation/flocculation, hydro-thermal and alcohols method can individually be improved by destroying the structure of Extracellular Polymers (EPS)
Sludge conditioning and dehydration make capillary respiratory time (CST) reduce by more than 18%.The advantages of PAC- methanol-water thermal method is to improve
Reaction rate reduces the consumption of chemicals and reduces retention time.
Summary of the invention
The purpose of the present invention is for the feelings that can not further decrease moisture percentage in sewage sludge by existing dewatering technology of mud
Condition proposes a kind of process of sludge dewatering, which combines flocculation of the PAC to sludge, polarity
Soluble small molecular alcohol compound combines destruction of the hydro-thermal process to cell membrane to the modifying function of protein, opens
Issue a kind of sludge dewatering treatment new process.
In order to achieve the above object, technical scheme is as follows:
A kind of process of combined type sludge dewatering, includes the following steps:
(1) into pending mud, aluminium polychloride is added, stirs evenly, obtains Treatment of Sludge object A；Wherein, described to stir
It mixes using mechanical stirring, churned mechanically stirring rate is 50-150rpm, mixing time 10-30min.
(2) into Treatment of Sludge object A, methanol is added, stirs evenly, obtains Treatment of Sludge object B；Stirring is stirred using machinery
It mixes, churned mechanically stirring rate is 50-150rpm, mixing time 10-30min.
(3) Treatment of Sludge object B is placed in temperature is 160-200 DEG C, and soaking time is preferably 10-50min, after reaction, from
It is so cooled to room temperature, the sludge that obtains that treated；
(4) will treated sludge settling, after layering, be dehydrated, obtain the water of dewatered sludge and sludge removing
Phase.
The dewatered sludge, moisture content≤65%, the pH of dewatered sludge are 6.9~7.2.
The additional amount of aluminium polychloride is 700-900mg/L in the step (1).
In the step (2), methanol concentration can be arbitrary value, and net content reaches requirement regulation.
In the step (2), the additional amount of methanol is 10-15 times of sludge quality.
In the step (3), the heating rate of Treatment of Sludge object B heating is 4-10 DEG C/min.
In the step (4), sedimentation time 0.5-2h.
In the step (4), dehydration is dehydrated using dehydration equipment, and dehydration equipment is preferably plate and frame filter press, band
One of formula filter, high speed deposition centrifugal dehydrator.
In the step (4), contains a large amount of carbonaceous materials in the water phase of mud removing, can be used as in denitrification process
Carbon source carry out reuse.
Compared with existing sludge dewatering technology, a kind of process of sludge dewatering of the invention, the beneficial effect is that:
(1) present invention uses PAC, methanol and hydro-thermal combined dehydration, and reagent additive amount is few, and process flow is simple, is taken off
After water, moisture percentage in sewage sludge can be made to be down to 65% or less.
(2) pH of sludge tends to be neutral after handling, corrosion-free to equipment, environmental-friendly.
(3) water phase after sludge dewatering can be used as carbon source.
(4) this technique is widely used in the sewage treatment plant of various sludge processing sewage.
(5) a kind of composite sludge dehydrant of the invention carries out in dewatering technology of mud, includes chemical treatment and physics
Handle two parts.The reagent used in chemical treating process includes: PAC and methanol.Physical treatment main method are as follows: at hydro-thermal
Reason.
Specific embodiment
Embodiment 1
PAC additive amount is 700mg/L, and methanol additive amount is 10 times of sludge butt, and hydro-thermal process temperature is 170 DEG C.Tool
Preparation is as follows:
(1) sludge of a certain amount of solid content 2.5% is weighed, sludge dry weight is calculated, proportionally adds PAC, with
100rpm stirs 20min.
(1) methanol is added in proportion into sludge after (1) processing, 30min is stirred with 150rpm.
(1) sludge after (2) processing is warming up to 170 DEG C with 10 DEG C/min, Temperature fall after constant temperature 20min, sludge pH is
7.0。
(1) by the static 1h of sludge in (3).
(1) sludge in (4) is subjected to mechanical dehydration in plate and frame filter press.Filter plate area 0.28m2, sludge in filter press
Treating capacity about 0.12m3, time of filter pressing 30min, maximum pressure 4.5MPa.
(1) the mud cake viscosity formed by sludge after processing in (5) is lower, moisture content of the cake 63%, and pressing filtering liquid pH is
7.1。
Embodiment 2
PAC additive amount is 900mg/L, and methanol additive amount is 15 times of sludge butt, and hydro-thermal process temperature is 180 DEG C.Tool
Preparation is as follows:
(1) sludge of a certain amount of solid content 2.2% is weighed, sludge dry weight is calculated, proportionally adds PAC, with
150rpm stirs 20min.
(1) methanol is added in proportion into sludge after (1) processing, 30min is stirred with 150rpm.
(1) sludge after (2) processing is warming up to 180 DEG C with 8 DEG C/min, Temperature fall after constant temperature 20min, sludge pH is
6.9。
(1) by the static 1.5h of sludge in (3).
(1) sludge in (4) is subjected to mechanical dehydration in plate and frame filter press.Filter plate area 0.28m in filter press2, sludge
Treating capacity about 0.12m3, time of filter pressing 30min, maximum pressure 4.5MPa.
(1) the mud cake viscosity formed by sludge after processing in (5) is lower, moisture content of the cake 62%, and pressing filtering liquid pH is
7.0。
Embodiment 3
PAC additive amount is 850mg/L, and methanol additive amount is 12 times of sludge butt, and hydro-thermal process temperature is 200 DEG C.Tool
Preparation is as follows:
(1) sludge of a certain amount of solid content 2.3% is weighed, sludge dry weight is calculated, proportionally adds PAC, with
100rpm stirs 20min.
(1) methanol is added in proportion into sludge after (1) processing, 30min is stirred with 100rpm.
(1) sludge after (2) processing is warming up to 200 DEG C with 5 DEG C/min, Temperature fall after constant temperature 20min, sludge pH is
7.1。
(1) by the static 0.5h of sludge in (3).
(1) sludge in (4) is subjected to mechanical dehydration in plate and frame filter press.Filter plate area 0.28m in filter press2, sludge
Treating capacity about 0.12m3, time of filter pressing 30min, maximum pressure 4.5MPa.
(1) the mud cake viscosity formed by sludge after processing in (5) is lower, moisture content of the cake 63%, and pressing filtering liquid pH is
7.0。
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (9)
1. a kind of process of combined type sludge dewatering, which comprises the steps of:
(1) into pending mud, aluminium polychloride is added, stirs evenly, obtains Treatment of Sludge object A；Wherein, the stirring is adopted
With mechanical stirring, churned mechanically stirring rate is 50-150rpm, mixing time 10-30min.
(2) into Treatment of Sludge object A, methanol is added, stirs evenly, obtains Treatment of Sludge object B；Stirring uses mechanical stirring, machine
The stirring rate of tool stirring is 50-150rpm, mixing time 10-30min.
(3) Treatment of Sludge object B is placed in temperature is 160-200 DEG C, and soaking time is preferably 10-50min, naturally cold after reaction
But to room temperature, the sludge that obtains that treated；
(4) will treated sludge settling, after layering, be dehydrated, obtain the water phase of dewatered sludge and sludge removing.
2. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that described dewatered
Sludge, moisture content≤65%, the pH of dewatered sludge are 6.9~7.2.
3. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step (1)
The additional amount of middle aluminium polychloride is 700-900mg/L.
4. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(2) in, methanol concentration can be arbitrary value, and net content reaches requirement regulation.
5. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(2) in, the additional amount of methanol is 10-15 times of sludge quality.
6. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(3) in, the heating rate of Treatment of Sludge object B heating is 4-10 DEG C/min.
7. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(4) in, sedimentation time 0.5-2h.
8. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(4) in, dehydration is dehydrated using dehydration equipment, dehydration equipment be preferably plate and frame filter press, band filter, high speed deposition from
One of heart dewaterer.
9. a kind of process of combined type sludge dewatering according to claim 1, which is characterized in that the step
(4) in, contain a large amount of carbonaceous materials in the water phase of mud removing, the carbon source that can be used as in denitrification process carries out reuse.
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| CN201910038311.XA CN109626794A (en) | 2019-01-16 | 2019-01-16 | A kind of process of combined type sludge dewatering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732322A (en) * | 2020-07-10 | 2020-10-02 | 同济大学 | Sludge deep dehydration treatment technical method for recycling conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070062882A1 (en) * | 2005-09-22 | 2007-03-22 | Water Environment Research Foundation | Method to control odors from dewatered biosolids cake |
| CN106316024A (en) * | 2016-09-28 | 2017-01-11 | 中国科学院新疆理化技术研究所 | Oil-containing sludge low-temperature pyrolysis reclamation treatment method |
| WO2018045543A1 (en) * | 2016-09-09 | 2018-03-15 | Kemira Oyj | Process for improved sludge dewatering |
| CN107804953A (en) * | 2016-09-09 | 2018-03-16 | 景津环保股份有限公司 | A kind of quenched high level cadre's dehydration technique of sludge hot |
| CN108249714A (en) * | 2018-02-02 | 2018-07-06 | 东华大学 | A kind of river bottom mud stabilizes and the method for recycling |
| CN108659876A (en) * | 2018-05-18 | 2018-10-16 | 沈阳航空航天大学 | The method for preparing bio oil is combined in pretreatment of raw material with hydrothermal liquefaction |
-
2019
- 2019-01-16 CN CN201910038311.XA patent/CN109626794A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070062882A1 (en) * | 2005-09-22 | 2007-03-22 | Water Environment Research Foundation | Method to control odors from dewatered biosolids cake |
| WO2018045543A1 (en) * | 2016-09-09 | 2018-03-15 | Kemira Oyj | Process for improved sludge dewatering |
| CN107804953A (en) * | 2016-09-09 | 2018-03-16 | 景津环保股份有限公司 | A kind of quenched high level cadre's dehydration technique of sludge hot |
| CN106316024A (en) * | 2016-09-28 | 2017-01-11 | 中国科学院新疆理化技术研究所 | Oil-containing sludge low-temperature pyrolysis reclamation treatment method |
| CN108249714A (en) * | 2018-02-02 | 2018-07-06 | 东华大学 | A kind of river bottom mud stabilizes and the method for recycling |
| CN108659876A (en) * | 2018-05-18 | 2018-10-16 | 沈阳航空航天大学 | The method for preparing bio oil is combined in pretreatment of raw material with hydrothermal liquefaction |
Non-Patent Citations (1)
| Title |
|---|
| 王学刚等: "《水处理工程（下册）》", 31 January 2015, 中国环境出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732322A (en) * | 2020-07-10 | 2020-10-02 | 同济大学 | Sludge deep dehydration treatment technical method for recycling conditioner |
| CN111732322B (en) * | 2020-07-10 | 2023-03-28 | 同济大学 | Sludge deep dehydration treatment technical method for recycling conditioner |
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