CN103819025B - Method and device for synchronous phosphorus removal and turbidity removal of thickened sludge water - Google Patents
Method and device for synchronous phosphorus removal and turbidity removal of thickened sludge water Download PDFInfo
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- CN103819025B CN103819025B CN201410085213.9A CN201410085213A CN103819025B CN 103819025 B CN103819025 B CN 103819025B CN 201410085213 A CN201410085213 A CN 201410085213A CN 103819025 B CN103819025 B CN 103819025B
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- thickened sludge
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Abstract
A method for synchronous phosphorus removal and turbidity removal of thickened sludge water comprises the following steps: stirring at high speed to perform homogenization treatment on sludge flocs in the thickened sludge water; adding a flocculating agent into the thickened sludge water subjected to homogenization treatment to realize quick flocculation; performing coagulation reaction on the thickened sludge water subjected to flocculation reaction to realize further densification of particle sludge produced in the coagulation reaction; performing solid-liquid separation on muddy water mixture subjected to densification, discharging the particle sludge through a spiral conveyor, collecting treated water through a collecting tank and further removing residual phosphorus in the water through adsorption to finally enable the outlet water to meet the discharge standards. The invention further provides a device for synchronous phosphorus removal and turbidity removal of the thickened sludge water. By the method and the device provided by the invention, the synchronous phosphorus removal and turbidity removal effect on the thickened sludge water in a sewage treatment plant is realized, the treatment cost is low, the treatment efficiency is high and the consumed time is short.
Description
Technical field
The invention belongs to technical field of sewage, particularly the synchronous dephosphorization of a kind of thickened sludge water is except purifying method and device.
Background technology
At present, municipal effluent generally adopts the biological treatment with denitrification dephosphorization function, comprising: the techniques such as AAO, oxidation ditch, Cass.Described several biological treatment pollutent in Reduction of Municipal Wastewater achieves huge achievement in the discharge of water body environment, has effectively contained that municipal effluent enters water surrounding and the water pollution problem caused.But the phosphor-removing effect in all biological treatments is all realized by the phosphorus effect of biting of polyP bacteria and the discharge of propagation mud (excess sludge).At present, conventional excess sludge processing mode comprises two kinds: 1) sludge condensation-sludge digestion-sludge dewatering, 2) integration of sludge concentrating and dewatering.Wherein first kind of way is applicable to big-and-middle-sized sewage work, and its treating processes can produce thickened sludge water and mud deviates from water; The second way is applicable to small sewage treatment plant, and its treating processes only produces mud and deviates from water.Excess sludge outward transport after concentrating, dewatering, carries out the recycling such as sanitary landfill or compost.Because thickened sludge water and mud are deviate from containing a large amount of suspensoids and phosphoric in water, the disposal options of its present stage carries out secondary treatment for entering sewage treatment plant inflow well.
Generally speaking, thickened sludge water and mud deviate from water quantity discharged comparatively large (accounting for 2 ~ 5% of sewage quantity), and SS content high (reaching as high as 20000mg/l), TP concentration large (50 ~ 150mg/l).Therefore, it directly enters Sewage treatment systems can bring great impact (municipal sewage plant's design water inlet TP concentration is generally less than 10mg/l) to biological treatment, and then has influence on the concentration of TP in process water.Along with the carrying out of mark transformation is carried by nationwide municipal sewage plant, pollutant emission standard rises to one-level A standard by one-level B, and the emission concentration of corresponding TP is increased to 0.5mg/l by 1mg/l.Therefore, develop the treatment process of applicable high-density phosphorus sludge water, for properly disposing thickened sludge water and mud is deviate from water, ensured that sewage work is stable and reach pollutant emission one-level A standard and have important practical significance.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide the synchronous dephosphorization of a kind of thickened sludge water except purifying method and device, the homogenization of thickened sludge water is completed by high-speed stirring, optimised coagulation operational condition, utilize aluminum salt flocculant synchronously to flocculate, the characteristic of Phosphate Sorption, complete the synchronous dephosphorization turbidity removal of thickened sludge water, increase the adsorption zone of residual phosphorus in water outlet simultaneously, realize the effect of the synchronous dephosphorization turbidity removal of sewage work's thickened sludge water, there is processing cost cheap, processing efficiency is high, short advantage consuming time.
To achieve these goals, the technical solution used in the present invention is:
The synchronous dephosphorization of a kind of thickened sludge water, except purifying method, comprises the steps:
High-speed stirring, carries out homogenization process to mud flco in thickened sludge water;
In the sludge water after homogenization process, add flocculation agent carry out rapid flocculation, form flco, carry out the adsorption process of phosphoric on flco in water simultaneously along with flocculation agent is hydrolyzed in water, the phosphoric absorption in final water migrates in mud flco;
Thickened sludge water through flocculation reaction is carried out aggregation, under hydraulic shear effect, forms initial granule sludge;
Optimum Hydraulic condition, the further densification of the granule sludge that cohesion is produced;
The mud mixture obtained after densification is carried out solid-liquid separation, and granule sludge is discharged through spiral conveyer, and process water removes phosphorus residual in water further by absorption, final outflow water qualified discharge after water leg is collected.
In described homogenization process, control stirring intensity G=350s
-1~ 450s
-1, time length 10 ~ 15min; In described rapid flocculation, stirring intensity G=150s
-1~ 200s
-1, the reaction times is 1 ~ 2min; In described aggregation, stirring intensity G=18s
-1~ 23s
-1, the reaction times is 10 ~ 15min; In described densification reaction, stirring intensity G=28s
-1~ 33s
-1, the reaction times is 25 ~ 30min.
Described flocculation agent is polyaluminium AlSnSi alloy, and dosage is 80 ~ 200mg/l.
Also add coagulant aids in described rapid flocculation process, coagulant aids is cationic-type polyacrylamide, and dosage is 5 ~ 15mg/l.
Described solid-liquid separation adopts perpendicular stream coprecipitation mode, upflow velocity 2mm/s.
Activated alumina is adopted to be sorbent material in described adsorption process, adsorption time 15min.
Invention also provides the synchronous dephosphorization separator for removing dirt of a kind of thickened sludge water, comprise connect in turn high-speed stirring district, flocculation reaction district, aggregation district, granulation compact zone, solid-liquid displacement zone and residual phosphorus adsorption zone.
Described high-speed stirring district connects the water inlet pipe 1 of thickened sludge water, wherein be provided with homogenizer 2, the top sides in high-speed stirring district is along making sludge water can flow into flocculation reaction district from top higher than flocculation reaction district, be provided with rapid flocculation stirrer 3 in flocculation reaction district and be connected with flocculating agent feeding device 12, set out water hole 4 bottom flocculation reaction district to be communicated with aggregation district, aggregation stirrer 5 is set in aggregation district and is connected with coagulant aids throwing device 13, the top sides in aggregation district is along making sludge water can flow into granulation compact zone from top higher than granulation compact zone, densification reaction stirrer 6 is provided with in granulation compact zone, arranging through hole between granulation compact zone and solid-liquid displacement zone makes sludge water can flow into solid-liquid displacement zone from through hole, the bottom of solid-liquid displacement zone is provided with sludge conveyor 8, the top sides of solid-liquid displacement zone is along making sludge water can flow into residual phosphorus adsorption zone from top higher than residual phosphorus adsorption zone, the supporting plate 10 of band filter cap is provided with in residual phosphorus adsorption zone, the top of supporting plate 10 is provided with adsorption beds of activated alumina, the below of supporting plate 10 is catchment area 11.
Described densification reaction stirrer 6 connects propeller 7.
Compared with prior art, the invention has the beneficial effects as follows:
1, present method achieves efficient, the flow process weakness reason of thickened sludge water.
2, present method and device easy and simple to handle, operate without the need to professional.
3, present method processing cost is cheap, easily realizes large-scale application.
Accompanying drawing explanation
Fig. 1 is the vertical view of the synchronous dephosphorization separator for removing dirt of a kind of thickened sludge of the present invention water.
Fig. 2 is A-A sectional view in Fig. 1.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
As depicted in figs. 1 and 2, the synchronous dephosphorization separator for removing dirt of a kind of thickened sludge water of the present invention, comprise connect in turn high-speed stirring district I (amounting to two lattice), flocculation reaction district II, aggregation district III, granulation compact zone IV, solid-liquid displacement zone V and residual phosphorus adsorption zone VI.High-speed stirring district I connects the water inlet pipe 1 of thickened sludge water, wherein be provided with homogenizer 2, the top sides in high-speed stirring district I is along making sludge water can flow into flocculation reaction district II from top higher than flocculation reaction district II, be provided with rapid flocculation stirrer 3 in flocculation reaction district II and be connected with flocculating agent feeding device 12, the bottom in flocculation reaction district II sets out water hole 4 and is communicated with aggregation district III, arranges aggregation stirrer 5 and be connected with coagulant aids throwing device 13 in aggregation district III.The top sides in aggregation district III is along making sludge water can flow into granulation compact zone IV from top higher than granulation compact zone IV, the densification reaction stirrer 6 of propeller 7 is provided with in granulation compact zone IV, arranging through hole between granulation compact zone IV and solid-liquid displacement zone V makes sludge water can flow into solid-liquid displacement zone V from through hole, the bottom of solid-liquid displacement zone V is provided with sludge conveyor 8, the top sides of solid-liquid displacement zone V is along making sludge water can flow into residual phosphorus adsorption zone VI from top higher than solid-liquid displacement zone, the supporting plate 10 of band filter cap is provided with in residual phosphorus adsorption zone VI, the top of supporting plate 10 is provided with adsorption beds of activated alumina, the below of supporting plate 10 is catchment area 11.
According to above structure, working process of the present invention is:
Sludge condensation water enters high-speed stirring district I (amounting to two lattice) by water inlet pipe 1, controls homogenizer 2 stirring intensity G=350s
-1~ 450s
-1, time length 10 ~ 15min, under the strong field of turbulent flow effect formed, makes flco homogenization in sludge water; Sludge water enters flocculation reaction district II from top subsequently, adds aluminum salt flocculant by flocculating agent feeding device 12 in water, and dosage is 80 ~ 200mg/l; And under flocculation stirring machine 3 is auxiliary, control stirring intensity G=150s
-1~ 250s
-1, carry out flocculation reaction, the reaction times is 1 ~ 2min, and in this process, complicated physical-chemical reaction occurs for mud granule, aluminum salt flocculant hydrolysate, and phosphoric free in strong adsorption water.
Sludge water through flocculation reaction enters aggregation district III by posticum 4 bottom flocculation reaction district II; Utilize coagulant aids throwing device 13 to add cationic-type polyacrylamide solution in process water, dosage is 5 ~ 10mg/l, under aggregation stirrer 5 acts on, and stirring intensity G=18s
-1~ 23s
-1, the reaction times is 10 ~ 15min, and polyacrylamide solution mixes with sludge water rapidly, playing it adsorbs-and bridge formation function, the tiny mud flco cohesion that flocculation reaction is formed increases, and the mud flco that this process is formed is more open; With after sludge water after aggregation enter granulation compact zone IV, formed in homogeneous shearing force field under stirrer 6 and propeller 7 acting in conjunction, stirring intensity G=28s
-1~ 33s
-1, the reaction times is 15 ~ 30min, completes granulating and the densification of loose mud flco; Sludge water through densification process enters solid-liquid displacement zone V from the bottom of densification reaction zone, granule sludge sinks to bottom through sludge conveyor 8 discharger, process water then enters residual phosphorus adsorption zone VI from top, after adsorption beds of activated alumina 9 processes, by the supporting plate 10 collection and treatment water of band filter cap, outer row after coming together in catchment area 11.
Claims (5)
1. the synchronous dephosphorization of thickened sludge water is except a purifying method, comprises the steps:
High-speed stirring, carries out homogenization process to mud flco in thickened sludge water;
In the sludge water after homogenization process, add flocculation agent carry out rapid flocculation, form flco, carry out the adsorption process of phosphoric on flco in water simultaneously along with flocculation agent is hydrolyzed in water, the phosphoric absorption in final water migrates in mud flco;
Thickened sludge water through flocculation reaction is carried out aggregation, under hydraulic shear effect, forms initial granule sludge;
Optimum Hydraulic condition, the further densification of the granule sludge that cohesion is produced;
The mud mixture obtained after densification is carried out solid-liquid separation, and granule sludge is discharged through spiral conveyer, and process water removes phosphorus residual in water further by absorption, final outflow water qualified discharge after water leg is collected;
It is characterized in that, in described homogenization process, control stirring intensity G=350s
-1~ 450s
-1, time length 10 ~ 15min; In described rapid flocculation, stirring intensity G=150s
-1~ 200s
-1, the reaction times is 1 ~ 2min; In described aggregation, stirring intensity G=18s
-1~ 23s
-1, the reaction times is 10 ~ 15min; In described densification reaction, stirring intensity G=28s
-1~ 33s
-1, the reaction times is 25 ~ 30min.
2. the synchronous dephosphorization of thickened sludge water according to claim 1 is except purifying method, and it is characterized in that, described flocculation agent is polyaluminium AlSnSi alloy, and dosage is 80 ~ 200mg/l.
3. the synchronous dephosphorization of thickened sludge water according to claim 1 is except purifying method, and it is characterized in that, also add coagulant aids in described rapid flocculation process, coagulant aids is cationic-type polyacrylamide, and dosage is 5 ~ 15mg/l.
4. the synchronous dephosphorization of thickened sludge water according to claim 1 is except purifying method, it is characterized in that, described solid-liquid separation adopts perpendicular stream coprecipitation mode, upflow velocity 2mm/s.
5. the synchronous dephosphorization of thickened sludge water according to claim 1 is except purifying method, it is characterized in that, adopts activated alumina to be sorbent material, adsorption time 15min in described adsorption process.
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|---|---|---|---|
| CN201410085213.9A CN103819025B (en) | 2014-03-10 | 2014-03-10 | Method and device for synchronous phosphorus removal and turbidity removal of thickened sludge water |
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|---|---|---|---|
| CN201410085213.9A CN103819025B (en) | 2014-03-10 | 2014-03-10 | Method and device for synchronous phosphorus removal and turbidity removal of thickened sludge water |
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| CN103819025B true CN103819025B (en) | 2015-02-25 |
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| CN107081122A (en) * | 2017-06-15 | 2017-08-22 | 兰州交通大学 | The method that dephosphorization agent is prepared using copper water-supply pipe |
| CN109336295B (en) * | 2018-12-12 | 2021-07-27 | 河南省科学院化学研究所有限公司 | Method for treating organophosphorus-containing flame-retardant cloth production wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648066A (en) * | 2004-12-27 | 2005-08-03 | 西安建筑科技大学 | Method and device for treating multiple form heavy metal waste water by multiphase transfer method |
| CN101117250A (en) * | 2007-06-01 | 2008-02-06 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648066A (en) * | 2004-12-27 | 2005-08-03 | 西安建筑科技大学 | Method and device for treating multiple form heavy metal waste water by multiphase transfer method |
| CN101117250A (en) * | 2007-06-01 | 2008-02-06 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
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Effective date of registration: 20220301 Address after: 721013 No. 1, north section of Fenghuang Sixth Road, high tech Development Zone, Baoji City, Shaanxi Province Patentee after: SHAANXI URSTAR ENVIRONMENTAL SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 710055 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |
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