CN105254156A - Reduction processing device and method for residual activated sludge - Google Patents
Reduction processing device and method for residual activated sludge Download PDFInfo
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- CN105254156A CN105254156A CN201510690219.3A CN201510690219A CN105254156A CN 105254156 A CN105254156 A CN 105254156A CN 201510690219 A CN201510690219 A CN 201510690219A CN 105254156 A CN105254156 A CN 105254156A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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Abstract
The invention belongs to the technical field of sludge processing and particularly relates to a reduction processing device and method for residual activated sludge. A specific processing device and processing method are adopted for the device and method, the residual activated sludge is processed in a multi-period pressure cyclic change mode, the oxygen transferring and utilizing efficiency is greatly improved, the degrading speed of organic matter is increased, and therefore a higher reaction rate and higher removing efficiency are achieved; the processed sludge is discharged when pressure in a biological reactor is P, scum and water can be fast and efficiently separated, the phosphorus removal step is used in an assisting mode in the processing process, insoluble phosphate and the scum can float up together to be discharged, and therefore the purpose of removing phosphorus is achieved.
Description
Technical field
The invention belongs to technical field of sludge treatment, be specifically related to a kind of minimizing treatment unit and method of residual active sludge.
Background technology
Excess sludge is the solid sediment produced in biological wastewater treatment process, it is the fittings after sewage disposal, the main component of these residual active sludges is bacterial cell material, organic concentration is high and be mainly solid substance, if do not dealt carefully with, these mud is very easy to cause secondary pollution to underground water, soil etc., becomes the threat of environmental safety and public health.Aerobic biological process technology is one of effective ways of sludge reduction process.At present, the aerobe decrement treatment method of biological sludge is mainly normal pressure aerobic sigestion technique, because the solids concn of pending excess sludge is high, organic concentration is high, need to consume more dissolved oxygen, and the transfer efficiency of aerator to oxygen is low under normal pressure, in mixed solution, dissolved oxygen concentration is low, therefore, normal pressure sludge aerobic digestion process also exists the degradation rate of biological sludge slow, needs the problems such as longer reaction times (about 20d) and larger air demand.
Summary of the invention
For the deficiencies in the prior art part, the present invention proposes a kind of minimizing treatment unit and method of residual active sludge, adopt the present invention, effectively can realize the minimizing process of residual active sludge.
The minimizing treatment unit of residual active sludge of the present invention comprises high pressure bio-reactor and floating upper separator, passes through sample pipe and be communicated with floating upper separator bottom bottom high pressure bio-reactor; Floating upper separator one side-lower is provided with primary water delivery pipe; High pressure bio-reactor top is provided with exhaust supervisor, and exhaust supervisor is provided with exhaust branch pipe; High pressure bio-reactor is provided with sample feeding pipe, chemical feed pipe and aeration air-supply duct from top to bottom successively.
Described exhaust supervisor is provided with at least two exhaust branch pipes; Described each exhaust branch pipe is equipped with magnetic valve and manually-operated gate.
Described high pressure bio-reactor top is provided with tensimeter and adjustable pressure safety value.
Apply the method that device of the present invention carries out the minimizing process of residual active sludge, its concrete steps are:
(1) pending residual active sludge is put into high pressure bio-reactor, open aeration air-supply duct;
(2) exhaust branch pipe is adjusted, P is risen to by 0 by the pressure uniform in high pressure bio-reactor within the time of 300-500s, then within the time of 300-500s, the pressure in high pressure bio-reactor is evenly dropped to 0 by P, complete a circular treatment;
(3) according to behind circulating treatment procedure circular treatment 4-6 days described in step (2), in high pressure bio-reactor, dephosphorization agent is added by chemical feed pipe, hybrid reaction 20-30min, when then bio-reactor internal pressure being risen to P, the mud processed is passed through sample pipe and enter floating upper separator separation.
During specific works, pending residual active sludge is put into high pressure bio-reactor, open aeration air-supply duct, in order to ensure that described residual active sludge can aeration preferably, ensure the utilization ratio of oxygen in reactor, the air demand of aeration air-supply duct of the present invention is that 1.5-3.0L air/h.L pond holds, and under this air demand condition, within the corresponding time, can ensure that the pressure in high pressure bio-reactor reaches the pressure condition of process needed for residual active sludge.
First the present invention adjusts exhaust branch pipe in concrete treating processes, P is risen to by 0 by the pressure uniform in high pressure bio-reactor within the time of 300-500s, then within the time of 300-500s, the pressure in high pressure bio-reactor is evenly dropped to 0 by P, complete a circular treatment; Why adopt this processing mode, be because the microorganisms such as bacterium in operational process in residual active sludge are in the environment that pressure constantly changes, its membrane passage can be strengthened, improve the mass-transfer efficiency of material.When the pressure in reactor rises to P by 0, the dissolved oxygen concentration in residual active sludge can be strengthened; Because aeration process of the present invention is oxygenation under the hydraulic pressure that will exceed several times and even decades of times than conventional aeration, the waste gas of supersaturated air and the generation of biooxidation reactions process can be dissolved with in residual active sludge (as CO
2deng), therefore when the pressure in reactor drops to 0 by P, the waste gas dissolved in residual active sludge can be removed, be beneficial in residual active sludge, refill fresh sky (oxygen) gas.Adopt circulating treatment procedure of the present invention, considerably increase the utilization ratio of oxygen, organic matter degradation speed is fast, has higher speed of reaction and removal efficiency, Be very effective.In order to reach good treatment effect, top pressure P of the present invention is 5-15atm, and top pressure is too small, circulation variable pressure DeGrain, and final treatment effect is bad; Top pressure is excessive, and machine utilization is excessive.
In order to realize controlling easily and effectively to the pressure in high pressure bio-reactor, exhaust supervisor of the present invention is provided with at least two exhaust branch pipes, preferably 10; Described each exhaust branch pipe is equipped with magnetic valve and manually-operated gate, is temporally set the open and close of Controlling solenoid valve successively by PLC.Magnetic valve is exhaust or cut out by means of only driving or close control vapor pipe, can not regulate free air delivery, needs, by regulating manual valve-opening degree size to control every root exhaust branch pipe air output, to be in opening-wide state after adjusting open degree.Magnetic valve and manually-operated gate combined utilization, can control reactor pressure easily and effectively, adapts to multiple operational conditions.
Residual active sludge in the present invention, after biological degradation, can discharge a large amount of phosphate radical, and concentration can reach 50 ~ 100mgP/L.Therefore, the present invention adds molysite or aluminium salt dephosphorization agent with high pressure dosing pump before process terminates in reactor, hybrid reaction 20-30min, dephosphorization agent generates insoluble phosphoric acid salt with phosphate radical hybrid reaction in the reactor, float together with mud in separator on floating, thus reach the object removing phosphorus from clear liquor.Described dephosphorization agent is Tai-Ace S 150 or iron(ic) chloride; Dephosphorization agent and phosphatic mol ratio are Fe
3+/ Al
3+: P=1.1.
Why by the residual active sludge that processes when bio-reactor internal pressure is P, enter floating upper separator by going out sample pipe to carry out separation be because now pressure is very large, large quantity of air is dissolved in residual active sludge, when it flows into floating separator through going out sample pipe, greatly reduce owing to going out sample pipe outlet pressure, the air be dissolved in residual active sludge is separated out and is formed a large amount of micro-bubble, these micro-bubbles stick on residual active sludge solid particulate, residual active sludge floats to rapidly liquid level and forms scum silica frost and separated removal under the buoyancy of micro-bubble, clarified water then flows in the waste water processes of Sewage Plant and processes.
Pending residual active sludge of the present invention refers to the residual active sludge that sewage work produces, and suspended sediment concentration is 8000 ~ 30000mg/L, is mainly bacterial cell material, and organic concentration is high and be mainly solid substance.
In sum, the present invention adopts specific treatment unit and treatment process, the mode of multicycle pressure cycling change is adopted to process to residual active sludge, considerably increase the transfer utilising efficiency of oxygen, improve organic degradation speed, thus there is higher speed of reaction and removal efficiency; The mud processed is discharged when bio-reactor internal pressure is P, achieves rapidly and efficiently being separated of scum silica frost and water, and in treating processes, be aided with dephosphorization step, insoluble phosphate and scum silica frost are together floated and discharges, and then reach dephosphorization object.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1, high pressure bio-reactor, 2, floating upper separator, 3, go out sample pipe, 4, primary water delivery pipe, 5, exhaust supervisor, 6, exhaust branch pipe, 7, sample feeding pipe, 8, chemical feed pipe, 9, aeration air-supply duct, 10, magnetic valve, 11, manually-operated gate, 12, tensimeter, 13, adjustable pressure safety value.
Embodiment
Embodiment 1
A minimizing treatment unit for residual active sludge, this device comprises high pressure bio-reactor 1 and floating upper separator 2, passes through sample pipe 3 and be communicated with bottom floating upper separator 2 bottom high pressure bio-reactor 1; Floating upper separator 2 one side-lower is provided with primary water delivery pipe 4; High pressure bio-reactor 1 top is provided with exhaust supervisor 5, and exhaust supervisor 5 is provided with exhaust branch pipe 6; High pressure bio-reactor 1 is provided with sample feeding pipe 7, chemical feed pipe 8 and aeration air-supply duct 9 from top to bottom successively.
Described exhaust supervisor 5 is provided with 10 exhaust branch pipes 6; Described each exhaust branch pipe 6 is equipped with magnetic valve 10 and manually-operated gate 11.
Described high pressure bio-reactor 1 top is provided with tensimeter 12 and adjustable pressure safety value 13.
Apply the method that above-mentioned device carries out the minimizing process of residual active sludge, its concrete steps are:
(1) pending residual active sludge is put into high pressure bio-reactor 1, open aeration air-supply duct 9;
(2) adjust exhaust branch pipe 6, rise to P by the pressure uniform in high pressure bio-reactor 1 within the time of 500s by 0, then within the time of 500s, the pressure in high pressure bio-reactor 1 is evenly dropped to 0 by P, complete a circular treatment;
(3) according to the circulating treatment procedure circular treatment described in step 2 after 6 days, in high pressure bio-reactor 1, dephosphorization agent is added by chemical feed pipe 8, hybrid reaction 20min, when then bio-reactor 1 internal pressure being risen to P, pass through the mud processed to go out sample pipe 3 and enter floating upper separator 2 and be separated.
The air demand 3.0L air/h.L pond of described aeration air-supply duct 1 holds.
Described pressure P is 15atm.
Described dephosphorization agent is Tai-Ace S 150; Dephosphorization agent and phosphatic mol ratio are Al
3+: P=1.1.
In described pending residual active sludge, suspended sediment concentration is 29000mg/L, water ratio is 97.1%, wherein the content of volatile solid is 19.2g/L, the content having processed rear volatile solid is 11.4g/L, in floating upper separator, the water ratio of floating scum silica frost is about 95.6%, clear liquor phosphate-containing 4.0mg/L.
Embodiment 2
A minimizing treatment unit for residual active sludge, this device comprises high pressure bio-reactor 1 and floating upper separator 2, passes through sample pipe 3 and be communicated with bottom floating upper separator 2 bottom high pressure bio-reactor 1; Floating upper separator 2 one side-lower is provided with primary water delivery pipe 4; High pressure bio-reactor 1 top is provided with exhaust supervisor 5, and exhaust supervisor 5 is provided with exhaust branch pipe 6; High pressure bio-reactor 1 is provided with sample feeding pipe 7, chemical feed pipe 8 and aeration air-supply duct 9 from top to bottom successively.
Described exhaust supervisor 5 is provided with 10 exhaust branch pipes 6; Described each exhaust branch pipe 6 is equipped with magnetic valve 10 and manually-operated gate 11.
Described high pressure bio-reactor 1 top is provided with tensimeter 12 and adjustable pressure safety value 13.
Apply the method that above-mentioned device carries out the minimizing process of residual active sludge, its concrete steps are:
(1) pending residual active sludge is put into high pressure bio-reactor 1, open aeration air-supply duct 9;
(2) adjust exhaust branch pipe 6, rise to P by the pressure uniform in high pressure bio-reactor 1 within the time of 400s by 0, then within the time of 400s, the pressure in high pressure bio-reactor 1 is evenly dropped to 0 by P, complete a circular treatment;
(3) according to the circulating treatment procedure circular treatment described in step 2 after 5 days, in high pressure bio-reactor 1, dephosphorization agent is added by chemical feed pipe 8, hybrid reaction 20min, when then bio-reactor 1 internal pressure being risen to P, pass through the mud processed to go out sample pipe 3 and enter floating upper separator 2 and be separated.
The air demand 2.2L air/h.L pond of described aeration air-supply duct 1 holds.
Described pressure P is 12atm.
Described dephosphorization agent is iron(ic) chloride; Dephosphorization agent and phosphatic mol ratio are Fe
3+: P=1.1.
In described pending residual active sludge, suspended sediment concentration is 18000mg/L, water ratio is 98.2%, wherein the content of volatile solid is 12.4g/L, the content having processed rear volatile solid is 8.8g/L, in floating upper separator, the water ratio of floating scum silica frost is about 95.0%, clear liquor phosphate-containing 4.8mg/L.
Embodiment 3
A minimizing treatment unit for residual active sludge, this device comprises high pressure bio-reactor 1 and floating upper separator 2, passes through sample pipe 3 and be communicated with bottom floating upper separator 2 bottom high pressure bio-reactor 1; Floating upper separator 2 one side-lower is provided with primary water delivery pipe 4; High pressure bio-reactor 1 top is provided with exhaust supervisor 5, and exhaust supervisor 5 is provided with exhaust branch pipe 6; High pressure bio-reactor 1 is provided with sample feeding pipe 7, chemical feed pipe 8 and aeration air-supply duct 9 from top to bottom successively.
Described exhaust supervisor 5 is provided with 10 exhaust branch pipes 6; Described each exhaust branch pipe 6 is equipped with magnetic valve 10 and manually-operated gate 11.
Described high pressure bio-reactor 1 top is provided with tensimeter 12 and adjustable pressure safety value 13.
Apply the method that above-mentioned device carries out the minimizing process of residual active sludge, its concrete steps are:
(1) pending residual active sludge is put into high pressure bio-reactor 1, open aeration air-supply duct 9;
(2) adjust exhaust branch pipe 6, rise to P by the pressure uniform in high pressure bio-reactor 1 within the time of 300s by 0, then within the time of 300s, the pressure in high pressure bio-reactor 1 is evenly dropped to 0 by P, complete a circular treatment;
(3) according to the circulating treatment procedure circular treatment described in step 2 after 4 days, in high pressure bio-reactor 1, dephosphorization agent is added by chemical feed pipe 8, hybrid reaction 30min, when then bio-reactor 1 internal pressure being risen to P, pass through the mud processed to go out sample pipe 3 and enter floating upper separator 2 and be separated.
The air demand 1.5L air/h.L pond of described aeration air-supply duct 1 holds.
Described pressure P is 5atm.
Described dephosphorization agent is iron(ic) chloride; Dephosphorization agent and phosphatic mol ratio are Fe
3+: P=1.1.
In described pending residual active sludge, suspended sediment concentration is 8500mg/L, water ratio is 99.1%, wherein the content of volatile solid is 6.3g/L, the content having processed rear volatile solid is 3.6g/L, in floating upper separator, the water ratio of floating scum silica frost is about 96%, clear liquor phosphate-containing 3.8mg/L.
Claims (8)
1. the minimizing treatment unit of a residual active sludge, it is characterized in that: this device comprises high pressure bio-reactor (1) and floating upper separator (2), high pressure bio-reactor (1) bottom is passed through sample pipe (3) and is communicated with floating upper separator (2) bottom; Floating upper separator (2) side-lower is provided with primary water delivery pipe (4); High pressure bio-reactor (1) top is provided with exhaust supervisor (5), and exhaust supervisor (5) is provided with exhaust branch pipe (6); High pressure bio-reactor (1) is provided with sample feeding pipe (7), chemical feed pipe (8) and aeration air-supply duct (9) from top to bottom successively.
2. the minimizing treatment unit of a kind of residual active sludge according to claim 1, is characterized in that: described exhaust supervisor (5) is provided with at least two exhaust branch pipes (6); Described each exhaust branch pipe (6) is equipped with magnetic valve (10) and manually-operated gate (11).
3. the minimizing treatment unit of a kind of residual active sludge according to claim 1, is characterized in that: described high pressure bio-reactor (1) top is provided with tensimeter (12) and adjustable pressure safety value (13).
4. application rights requires that the device described in 1 carries out the method for the minimizing process of residual active sludge, it is characterized in that: its concrete steps are:
(1) pending residual active sludge is put into high pressure bio-reactor (1), open aeration air-supply duct (9);
(2) exhaust branch pipe (6) is adjusted, P is risen to by 0 by the pressure uniform in high pressure bio-reactor (1) within the time of 300-500s, then within the time of 300-500s, the pressure in high pressure bio-reactor (1) is evenly dropped to 0 by P, complete a circular treatment;
(3) according to behind circulating treatment procedure circular treatment 4-6 days described in step (2), in high pressure bio-reactor (1), dephosphorization agent is added by chemical feed pipe (8), hybrid reaction 20-30min, when then bio-reactor (1) internal pressure being risen to P, the mud processed is passed through sample pipe (3) and enter floating upper separator (2) separation.
5. the method for the minimizing process of residual active sludge according to claim 4, is characterized in that: the air demand 1.5-3.0L air/h.L pond of described aeration air-supply duct (1) holds.
6. the method for the minimizing process of residual active sludge according to claim 4, is characterized in that: described pressure P is 5-15atm.
7. the method for the minimizing process of residual active sludge according to claim 4, is characterized in that: described dephosphorization agent is Tai-Ace S 150 or iron(ic) chloride; Dephosphorization agent and phosphatic mol ratio are Fe
3+/ Al
3+: P=1.1.
8. the method for the minimizing process of residual active sludge according to claim 4, is characterized in that: in described pending residual active sludge, suspended sediment concentration is 8000 ~ 30000mg/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510690219.3A CN105254156B (en) | 2015-10-22 | 2015-10-22 | The minimizing of a kind of residual active sludge processes device and method |
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|---|---|---|---|
| CN201510690219.3A CN105254156B (en) | 2015-10-22 | 2015-10-22 | The minimizing of a kind of residual active sludge processes device and method |
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| CN105254156A true CN105254156A (en) | 2016-01-20 |
| CN105254156B CN105254156B (en) | 2016-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106396308A (en) * | 2016-10-27 | 2017-02-15 | 环境保护部华南环境科学研究所 | Excess activated sludge recycling method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687498A (en) * | 1979-12-18 | 1981-07-16 | Miura Eng Internatl Kk | Treatment of dehydrated sludge |
| JPS57105294A (en) * | 1980-12-19 | 1982-06-30 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for aerobic digestion of sludge |
| CN104961308A (en) * | 2015-06-12 | 2015-10-07 | 辽宁大学 | Method of enhancing gradient phosphorus release for excess sludge by high-pressure pulse preprocessing technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5687498B2 (en) * | 2011-01-05 | 2015-03-18 | 株式会社Ｎｔｔファシリティーズ | Power conversion system |
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2015
- 2015-10-22 CN CN201510690219.3A patent/CN105254156B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5687498A (en) * | 1979-12-18 | 1981-07-16 | Miura Eng Internatl Kk | Treatment of dehydrated sludge |
| JPS57105294A (en) * | 1980-12-19 | 1982-06-30 | Hitachi Plant Eng & Constr Co Ltd | Method and apparatus for aerobic digestion of sludge |
| CN104961308A (en) * | 2015-06-12 | 2015-10-07 | 辽宁大学 | Method of enhancing gradient phosphorus release for excess sludge by high-pressure pulse preprocessing technique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106396308A (en) * | 2016-10-27 | 2017-02-15 | 环境保护部华南环境科学研究所 | Excess activated sludge recycling method |
| CN106396308B (en) * | 2016-10-27 | 2019-12-31 | 环境保护部华南环境科学研究所 | Recycling method of residual activated sludge |
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| CN105254156B (en) | 2016-06-08 |
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