CN101428943A - Full-flow process for upgrading and reconstructing urban sewage factory - Google Patents
Full-flow process for upgrading and reconstructing urban sewage factory Download PDFInfo
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- CN101428943A CN101428943A CNA2008102392261A CN200810239226A CN101428943A CN 101428943 A CN101428943 A CN 101428943A CN A2008102392261 A CNA2008102392261 A CN A2008102392261A CN 200810239226 A CN200810239226 A CN 200810239226A CN 101428943 A CN101428943 A CN 101428943A
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention provides a whole flow for upgrading a municipal sewage treatment plant, which belongs to the field of municipal sewage treatment and reclamation. The flow is characterized in that second-stage outlet water from the sewage treatment plant enters a flocculation tank through a water inlet pipe, simultaneously added with a flocculant through a flocculation tank addition pipe, and flows to an air flotation tank by the gravity of a water outlet pipe; in the air flotation tank, floc combination meets dissolved-air water in a dissolved-air backflow pipe, is collided with and adhered to micro bubbles released by a dissolved air releaser, and floated upwards to an air flotation tank separation region; scum is discharged from a scum outlet; air flotation outlet water flows in an arobic filtering pool through a water outlet pipe, oxygen needed by organism is supplied by an aeration pipe, and the water is charged through a water outlet pipe; after one filter cycle; and a filter material is backwashed by air and water supplied by a backwashing air pipe and a backwashing water pipe respectively, and the backwashing sewage is discharged through a sewage pipe. The whole flow has the advantages of eliminating nutrients such as organism and ammonia nitrogen in the second-stage outlet water, further reducing physical indexes such as turbidity and chromaticity after the particle removal by air flotation and improving water quality.
Description
Technical field
The invention belongs to municipal sewage treatment and resource utilization field, particularly sewage second-level treatment plant upgrading, regeneration effluent full-flow process.
Background technology
At present, China has realized that cities and towns must be provided with the target of sewage work, and the situation in line river of municipal effluent originally and lake is able to very big change, and urban environment has had bigger improvement.But the present Sewage Plant overwhelming majority is a second-stage treatment, severe situation at China's shortage of water resources, water is again as a kind of resource of sustainable recycle, Sewage Plant faces upgrading, the secondary effluent advanced treatment of national secondary discharge standard will be reached, strive for reaching one-level B standard, or even one-level A standard, make water resources can come back to the city, satisfy the demand of user to reuse water, really allow water resources finish health nature and society circulation, for human economy and life are benefited.
The variation of Sewage Plant upgrading technology, mainly according to secondary effluent water quality, increase physics, chemistry and biological method and further remove materials such as granule foreign in the water, nitrogen, phosphorus, but the coagulation+precipitation+filtration process for routine is not only numerous and diverse, occupation of land is many, and limited to the nutraceutical removal effect of organism and nitrogen etc. in the secondary effluent.
Summary of the invention
The objective of the invention is to solve the problem that existing municipal effluent plant effluent can not satisfy reuse water water quality, and overcome the shortcoming of present conventional water treatment process, and a kind of regeneration effluent full-flow process is provided, thereby the assurance Sewage Plant is carried out upgrading on the basis of original treatment process.
Equipment therefor of the present invention is by forming with the lower section:
The invention provides a kind of full-flow process that is used for upgrading and reconstructing urban sewage factory, it is characterized in that: the Sewage Plant secondary effluent enters flocculation basin 1 by water inlet pipe 4, add flocculant of polymeric aluminium chloride by flocculant concentration pipe 8 simultaneously, after flocculation, impurity particle in the water, mud fragment, organism take off steady polymerization, form wadding burl zoarium, flow to air flotation pool 2 by rising pipe 5 gravity then;
In air flotation pool, the flco combination runs into the dissolved air water of molten gas backflow water pipe 9, the micro bubble collision that discharges with dissolved air release adheres to, float to the air flotation pool disengaging zone, scum silica frost is discharged through scum silica frost outlet 10, and the air supporting water outlet has flowed into air filter pond 3 by rising pipe 6, aeration tube provides biological aerobic, physics through the filter tank is held back, the microbial process on absorption and the filtrate, and water quality is further purified, through rising pipe 7 water outlets;
Finish filtration cycle, provides G﹠W to the filtrate back flushing respectively by backwash tracheae and backwash water pipe 12, and backwash waste is discharged through backwash waste pipe 13.
Compare with existing city sewage deep treatment technology, the present invention has following beneficial effect:
1, the air flotation pool of process using replaces traditional settling tank, is easy to remove the suspended sludge fragment in the secondary effluent, the micro polluting substance that the colloidal solid isodensity approaches water.And the air flotation pool load is high, floor space is little, invests low.
2, air flotation pool water outlet dissolved oxygen is beneficial to the biochemical reaction in the follow-up good air filter pond near saturated, further removes organism, purifies water.If consider the nitration reaction of ammonia nitrogen, aeration tube can replenish biological aerobic.
3, good air filter pond is as the maturation process of secondary effluent advanced treatment, the function that possesses BAF and conventional rapid filter simultaneously, not only to nutrient removals such as organism in the secondary effluent and ammonia nitrogens, and can also after particulate matter is removed in air supporting, further reduce physical indexs such as turbidity and colourity, water quality is improved.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The former life sewage of Sewage Plant, secondary effluent, degree of depth water outlet and degree of depth clearance such as following table 1.
The concrete operations statement parameter is as follows:
With reference to Fig. 1, the Sewage Plant secondary effluent enters flocculation basin 1 by water inlet pipe 4, adds flocculant of polymeric aluminium chloride by flocculant concentration pipe 8 simultaneously, is 70mg/L according to table 1 secondary effluent water quality situation flocculant dosage.Hybrid reaction takes place in secondary effluent and flocculation agent in line mixer, and under three grades of stirrings flocculation reaction takes place in flocculation basin, and stirring intensity is 50/30/20 (S
-1), reaction time is 20min.After flocculation, the impurity particle in the water, mud fragment, organism etc. take off steady polymerization, form wadding burl zoarium, flow to air flotation pool 2 by rising pipe 5 gravity then, the air flotation pool molten gas of gas-liquid mixing pump, and dissolved-air pressure is 392kPa, reflux ratio is 40%.In air flotation pool, flco runs into the dissolved air water of molten gas backflow water pipe 9, the micro bubble collision that discharges with dissolved air release adheres to, float to the air flotation pool disengaging zone, scum silica frost is discharged through scum silica frost outlet 10, and the air supporting water outlet has flowed into air filter pond 3 by rising pipe 6, the upward flow operation scheme is adopted in the filter tank, filtering velocity 2.0m/h, aeration tube 11 provides biological aerobic, gas-water ratio 2:1.Physics through the filter tank is held back, the microbial process on absorption and the filtrate, and water quality is further purified, through rising pipe 7 water outlets.The filter tank head loss reaches 1m, and finish filtration cycle, provides G﹠W to the filtrate back flushing respectively by backwash tracheae 11 and backwash water pipe 12, and backwash waste is discharged through backwash waste pipe 13, and the back flushing parameter is: gas is towards intensity 11.1L/m separately
2S, flushing 3min; Associating gas is towards intensity 11.1L/m
2S, water is towards intensity 4.5L/m
2S, flushing 6min; Water rinse intensity 8.9L/m
2S, rinsing time 5min.
As seen from Table 1, by flocculation-air floating-good air filter pool process, secondary effluent water quality is largely increased, except that the bacterium index need increase disinfect, all other indexs have reached the reuse water water-quality guideline.
Table 1
| Index | Turbidity/NTU | Colourity/degree | UV 254 /cm -1 | COD /mg/L | NH 3-N /mg/L | TP /mg/L | Total plate count/10 4Individual ml -1 |
| Raw waste water | — | — | — | 350-450 | 80-100 | 8-10 | — |
| Secondary effluent | 4-15 | 100-150 | 0.12-0.27 | 50-80 | 15-70 | 1-5 | 13-22 |
| Degree of depth water outlet | 0.5-2.6 | 29.7-51.7 | 0.03-0.17 | 22.5-35.2 | 0.4-15 | 0-0.8 | 3.9-6.1 |
| Degree of depth clearance (%) | 78 | 65 | 46 | 47 | 80 | 83 | 63 |
Claims (1)
1. full-flow process that is used for upgrading and reconstructing urban sewage factory, it is characterized in that: the Sewage Plant secondary effluent enters flocculation basin by water inlet pipe, add flocculation agent by the flocculant concentration pipe simultaneously, after flocculation, impurity particle in the water, mud fragment, organism take off steady polymerization, form wadding burl zoarium, flow to air flotation pool by rising pipe gravity then;
In air flotation pool, the flco combination runs into the dissolved air water of molten gas backflow water pipe, the micro bubble collision that discharges with dissolved air release adheres to, float to the air flotation pool disengaging zone, scum silica frost is discharged through the scum silica frost outlet, and the air supporting water outlet has flowed into the air filter pond by rising pipe, aeration tube provides biological aerobic, physics through the filter tank is held back, the microbial process on absorption and the filtrate, and water quality is further purified, through the rising pipe water outlet;
Finish filtration cycle, provides G﹠W to the filtrate back flushing respectively by backwash tracheae and backwash water pipe, and backwash waste is discharged through the backwash waste pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102392261A CN101428943A (en) | 2008-12-05 | 2008-12-05 | Full-flow process for upgrading and reconstructing urban sewage factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102392261A CN101428943A (en) | 2008-12-05 | 2008-12-05 | Full-flow process for upgrading and reconstructing urban sewage factory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101428943A true CN101428943A (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102392261A Pending CN101428943A (en) | 2008-12-05 | 2008-12-05 | Full-flow process for upgrading and reconstructing urban sewage factory |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126816A (en) * | 2011-04-25 | 2011-07-20 | 榆林学院 | Method for treating sewage by adopting biological-physical combined method |
| CN102826720A (en) * | 2012-09-18 | 2012-12-19 | 焦作隆丰皮草企业有限公司 | Fur processing wastewater reuse treatment method |
| CN105174633A (en) * | 2015-09-28 | 2015-12-23 | 罗依依 | Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A |
| CN105236662A (en) * | 2015-09-28 | 2016-01-13 | 罗依依 | Comprehensive standard improving apparatus for municipal sewage treatment plant discharge water from glade 1B to grade A |
| CN108128861A (en) * | 2017-12-18 | 2018-06-08 | 宁波清智环保科技有限公司 | Industrial sewage treatment system |
-
2008
- 2008-12-05 CN CNA2008102392261A patent/CN101428943A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126816A (en) * | 2011-04-25 | 2011-07-20 | 榆林学院 | Method for treating sewage by adopting biological-physical combined method |
| CN102826720A (en) * | 2012-09-18 | 2012-12-19 | 焦作隆丰皮草企业有限公司 | Fur processing wastewater reuse treatment method |
| CN105174633A (en) * | 2015-09-28 | 2015-12-23 | 罗依依 | Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A |
| CN105236662A (en) * | 2015-09-28 | 2016-01-13 | 罗依依 | Comprehensive standard improving apparatus for municipal sewage treatment plant discharge water from glade 1B to grade A |
| CN108128861A (en) * | 2017-12-18 | 2018-06-08 | 宁波清智环保科技有限公司 | Industrial sewage treatment system |
| CN108128861B (en) * | 2017-12-18 | 2020-04-14 | 宁波清智环保科技有限公司 | Industrial sewage treatment system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |