CN101205097A - Two-stage A/O vertical flow artificial wetland sewage treatment system - Google Patents
Two-stage A/O vertical flow artificial wetland sewage treatment system Download PDFInfo
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- CN101205097A CN101205097A CNA2007101902421A CN200710190242A CN101205097A CN 101205097 A CN101205097 A CN 101205097A CN A2007101902421 A CNA2007101902421 A CN A2007101902421A CN 200710190242 A CN200710190242 A CN 200710190242A CN 101205097 A CN101205097 A CN 101205097A
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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
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Abstract
The invention relates to a system device for treating sewage in an A/O vertical flow constructed wetland, which is characterized in that the system device comprises a pretreatment desilting basin and a multilevel vertical flow constructed wetland; an outlet of the pretreatment desilting basin is connected with an inlet of the multilevel flow constructed wetland; two neighboring levels of the multilevel flow constructed wetland are communicated; the first processing unit of each level is a hypoxia unit; the rest processing units belong to aerobic 'wet/dry' alternating running-state processing units; the last aerobic 'wet/dry' alternating running-state processing unit of each level is communicated with the oxygen-poor processing unit of which the last aerobic 'wet/dry' alternating running-state processing unit is arranged.The constructed wetland system can strengthen nitrogen and phosphorus removal capacity of water and has high efficiency, fast phosphorus removal speed, small covering area, strong resistance to shock load and long service life of the wetland.
Description
One, technical field
The invention belongs to the sewage/wastewater processing technology field, particularly a kind of two-stage A/O type vertical flow artificial wetland sewage treatment system device.
Two, background technology
Prior art: the artificial swamp technology characteristics such as is considered to have less energy-consumption, low maintenance, sewage disposal and beautifies that view combines and is widely used in municipal wastewater processing, trade effluent and the agricultural effluent processing.But still exist dephosphorization and denitrification effect poor in this technology, fluctuation of service, problem such as floor space is big, the life-span is short.In recent years, people constantly seek to have the efficient dephosphorization ability and conveniently obtains cheap material as the matrix in the artificial swamp, the principle of selecting these materials is exactly the Ca of material own, Al, Fe content is higher, bigger specific surface area and voidage, hydraulics is better, many in Shen Qing the patent in the past with zeolite, blast furnace slag, Wingdale, flyash etc. are as artificial swamp dephosphorization filler, although these fillers itself all have the ability of absorption phosphorus, but it is higher often to be difficult for acquisition and cost, as wetland medium anti impulsion load ability, rate of adsorption is slow and easily saturated, can not improve the soil fertilizer efficiency effectively, long-play also can cause wetland seriously to stop up.
Sludge of drinking water is the by product of water technologies such as coagulation, flocculation in the urban drinking water factory, the waterworks preprocessing part all adopts aluminium salt or molysite to remove natural organic matter, turbidity, colloidalmaterial, colourity etc. in the former water in the existing large-and-medium size cities of China, thus in the sludge of drinking water content of Al or Fe than higher.Present most of sludge of drinking water all passes through the just direct landfill of simple dehydration, seldom as the secondary reuse, it is turned waste into wealth.Once reported that sludge of drinking water efficiently adsorbed the behavior of phosphorus and the characteristic that can effectively improve soil abroad.But the sludge of drinking water that will dewater is used for the vertical current constructed wetland main stuffing not to appear in the newspapers.
For traditional artificial wetland process, no matter be surperficial flow pattern or undercurrent type, only rely on plant absorption, precipitation and faint biological denitrification ability still can not effectively remove when ammonia nitrogen concentration is higher in the nitrogen, particularly water in the water body, effluent quality is difficult to up to standard.Therefore be necessary a plurality of artificial swamp cell string and backflow, be similar to traditional active sludge A/O denitrification process, denitrogenation ability in the technological angle consolidation system.Up-to-date in addition research shows that also adopting the intermittent operation mode can effectively recover wetland matrix adsorbs saturated unrenewable problem, prolongs wetland working time.But with multistage artificial swamp unit according to the different residence time, idle mixing time and realize that the combination of internal system backflow intensified denitrification and dephosphorization does not but appear in the newspapers.
Three, summary of the invention
Technical problem: the present invention is directed to above-mentioned technical problem, a kind of have anaerobic-aerobic (Anoxic/oxic, A/O) function two-stage composite vertical current artificial wetland treatment system device are provided.This artificial wet land system can be strengthened the water body denitrification dephosphorization ability, and the efficient height, and dephosphorization speed is fast, and floor space is little, and the anti impulsion load ability is strong, the wetland long service life.
Technical scheme: a kind of two-stage A/O type vertical flow artificial wetland sewage treatment system device, this system and device comprises pre-treatment sedimentation basin and multistage vertical current constructed wetland, the water outlet of pre-treatment sedimentation basin is connected with the water-in of multistage vertical current constructed wetland, the adjacent two-stage of described multistage vertical current constructed wetland is communicated with, first processing unit of each grade is the anaerobic treatment unit, all the other processing units are aerobic " wet/as to do " alternate run state processing unit, and the anaerobic treatment unit of aerobic " wet/as to do " the alternate run state processing unit of last of each grade and its place level is communicated with.Multistage vertical current constructed wetland is made up of one-level A/O artificial swamp and secondary A/O artificial swamp, above-mentioned one-level A/O artificial swamp is made up of anaerobic treatment unit a, aerobic treatment unit b, aerobic treatment unit c, aerobic treatment unit c is communicated with anaerobic treatment unit a, secondary A/O artificial swamp is made up of anaerobic treatment unit a ', aerobic treatment unit b ', aerobic treatment unit c ', and aerobic treatment unit c ' is communicated with anaerobic treatment unit a '.Be filled with 70% dewatered sludge, gravel and soil in each processing unit of multistage vertical current constructed wetland, wherein the top layer of weighting material is a pedosphere, and pedosphere is the sludge blanket and the gravel bed of alternately filling down, and the grain-size grade of described sludge blanket from top to bottom successively decreases.Each processing unit of multistage vertical current constructed wetland is equipped with water distribution system, suction pump and magnetic valve, and all pumps connect control by the PLC programmable controller.
With the dehydration sludge of drinking water that accounts for total filler volume 70% is that the artificial swamp of main stuffing is characterized in that treatment system is made up of pre-treatment sedimentation basin and multistage vertical current constructed wetland two parts, sedimentation basin is used for removing a large amount of foreign material of water body, suspended substance, partial organic substances etc., to guarantee that follow-up artificial wet land treating system is difficult for stopping up.Multistage artificial swamp unit uses suction pump to be communicated with in turn, and the sludge of drinking water that remains among anaerobic treatment unit a and the anaerobic treatment unit a ' is in submerged, it is anaerobic environment, and aerobic treatment unit c and the c ' water outlet of aerobic treatment unit are back to anaerobic treatment unit a and anaerobic treatment unit a ' respectively, thereby strengthened the wetland denitrification denitrogenation function from technological angle, aerobic treatment unit b, aerobic treatment unit c, aerobic treatment unit b ', aerobic treatment unit c ' takes into water, emptying, idle alternate run mode, not only make filler be in " wet/as to do " alternating state, and effectively realize the reoxygenation mass transfer of filler inside, strengthen nitrated ability, also recovered the efficient absorption potential of sludge of drinking water phosphorus.Suppress filling surface microorganism hypertrophy phenomenon simultaneously, prevented the packing layer obstruction.Anaerobic treatment unit a, aerobic treatment unit b, aerobic treatment unit c constitute one-level A/O artificial wetland process, and anaerobic treatment unit a ', aerobic treatment unit b ', aerobic treatment unit c ' constitute secondary A/O artificial wetland process.Six wetland unit Inlet and outlet waters all adopt the pump suction, top water inlet bottom water outlet, give full play to the strainability of holding back of packing layer, system is by PLC programmable controller control running fully automatically, and according to the different update reprogramming operational mode of waste water quality, the water yield.
Filling filler in six wetland units all adopts 70% dewatered sludge and gravel, the anti-granularity of soil to load, big particle diameter dewatered sludge is as for the superiors, small particle size mud filling bottom, and type of feed adopts one deck mud one deck gravel, top layer is a soil, and filling can fully increase the packing layer voidage and prevents that effectively filler from stopping up and increase the oxygen transfer ability like this.
Beneficial effect: adopt 70% tap water dewatered sludge and join gravel etc. as the wetland compounded mix, this compounded mix can effectively be removed the phosphorus of various forms in the water body, and filler is inner fully to be contacted with air, has strengthened the oxygen transfer ability, and the sludge of drinking water surface is difficult for and air in CO
2In conjunction with the surface scale phenomenon takes place, has more superior condition than the filler that contains the Ca composition.
The multistage artificial wetland process of A/O type itself has the very strong ability of denitrogenating, and gives full play to attached to microorganism denitrification denitrogenation ability under the filling surface anoxia condition, and this also is a characteristic of the present invention.
Based on the waterworks dewatered sludge is the multistage artificial wet land system of wetland main stuffing, strengthened the dephosphorization ability of filler own, and rate of adsorption is fast, hydraulic detention time is short, significantly reduced the artificial swamp floor space, investment and working cost are low, convenient management.And multistage artificial wet land system operation/stagnation hockets, and the again absorption property of the saturated phosphorus sludge of drinking water of efficient recovery to phosphorus can be arranged, and has prolonged wetland operation life greatly.
System is strong to the anti impulsion load ability of phosphorus, and sludge of drinking water also has stronger quick adsorptive power to high concentration phosphorus.The dehydration sludge of drinking water except phosphorus, organism etc. being had the efficient removal ability, also can be removed arsenic residual in the water and endocrine disrupter as wetland matrix.This also is another characteristics that the present invention adopts the reuse of dehydration sludge of drinking water secondary.
Sludge of drinking water is used for artificial swamp and has also opened up another approach for water treatment plant dewatered sludge treatment and disposal, makes its second stage employ, turns waste into wealth.
This artificial wet land system has been strengthened filler effect, under the situation that does not have the plant purification function, still can efficiently remove nitrogen in the water, phosphorus and harmful, toxic organic compound, reaches the purpose that purifies water.
Four, description of drawings
Fig. 1 is the multistage artificial swamp integrated technique of an A/O of the present invention synoptic diagram.
Among the figure: water inlet settling pit (26), intake pump (29), anaerobic treatment unit a (1), aerobic treatment unit b (2), aerobic treatment unit c (3), anaerobic treatment unit a ' (4), aerobic treatment unit b ' (5), aerobic treatment unit c ' (6), outlet pipeline (28), intake pump magnetic valve (25), suction pump (9) magnetic valve (24), suction pump (10) magnetic valve (23), suction pump (11) magnetic valve (21), suction pump (12), magnetic valve (17), suction pump (13) magnetic valve (18), suction pump (14) magnetic valve (19), reflux pump (15) magnetic valve (22), reflux pump (16) magnetic valve (20), aerobic treatment unit c (3) part effluent recycling is to the piping system (7) of anaerobic treatment unit a (1), the return line system (8) of aerobic treatment unit c ' (6) backflow anaerobic treatment unit a ' (4), PLC programmable controller (27).
Five, embodiment
Add COD, ammonia nitrogen, total nitrogen, total phosphorus mean concns and be respectively the sanitary sewage of 178mg/L, 18.7mg/L, 15.6mg/L, 2.55mg/L, the enhanced compounded mix multi-stage alternate wet land system is respectively 95%, 98%, 96%, 99% to the clearance of COD, ammonia nitrogen, total nitrogen, total phosphorus, treat effluent COD, ammonia nitrogen, total nitrogen, total phosphorus mean concns are 8.9mg/L, 0.374mg/L, 0.624mg/L, 0.03mg/L, reach the reusing sewage standard.
Take from farm sewage, water body SS, COD, BOD, total nitrogen, PO
4 3-Concentration is 85-178mg/L, 210-378mg/L, 87-245mg/L, 210-350mg/L, 49-90mg/L, and former water is through two-stage A/O type vertical current constructed wetland treatment system, water outlet SS, COD, BOD, total nitrogen, PO
4 3-Clearance be respectively 92%, 94%, 90%, 95%, 98%.
A kind of two-stage A/O type vertical flow artificial wetland sewage treatment system device, this system and device comprises pre-treatment sedimentation basin and multistage vertical current constructed wetland, the water outlet of pre-treatment sedimentation basin is connected with the water-in of multistage vertical current constructed wetland, the adjacent two-stage of described multistage vertical current constructed wetland is communicated with, first processing unit of each grade is the anaerobic treatment unit, all the other are water inlet, emptying, " wet/as to do " that leave unused replaces aerobic operation unit, and the anaerobic treatment unit of aerobic " wet/as to do " the alternate run state processing unit of last of each grade and its place level is communicated with.
Multistage vertical current constructed wetland is made up of one-level A/O artificial swamp and secondary A/O artificial swamp, above-mentioned one-level A/O artificial swamp is made up of anaerobic treatment unit a (1), aerobic treatment unit b (2), aerobic treatment unit c (3), aerobic treatment unit c (3) is communicated with anaerobic treatment unit a1, secondary A/O artificial swamp is made up of anaerobic treatment unit a ' (4), aerobic treatment unit b ' (5), aerobic treatment unit c ' (6), and aerobic treatment unit c ' (6) is communicated with anaerobic treatment unit a ' (4).Be filled with 70% dewatered sludge, gravel and soil in each processing unit of multistage vertical current constructed wetland, wherein the top layer of weighting material is a pedosphere, and pedosphere is the sludge blanket and the gravel bed of alternately filling down, and the grain-size grade of described sludge blanket from top to bottom successively decreases.Each processing unit of multistage vertical current constructed wetland is equipped with water distribution system, suction pump and magnetic valve, and all pumps connect control by PLC programmable controller (27).
Claims (4)
1. two-stage A/O type vertical flow artificial wetland sewage treatment system device, it is characterized in that this system and device comprises pre-treatment sedimentation basin and multistage vertical current constructed wetland, the water outlet of pre-treatment sedimentation basin is connected with the water-in of multistage vertical current constructed wetland, the adjacent two-stage of described multistage vertical current constructed wetland is communicated with, first processing unit of each grade is the anaerobic treatment unit, all the other processing units are aerobic " wet/as to do " alternate run state processing unit, and the anaerobic treatment unit of aerobic " wet/as to do " the alternate run state processing unit of last of each grade and its place level is communicated with.
2. two-stage A/O type vertical flow artificial wetland sewage treatment system device according to claim 1, it is characterized in that described multistage vertical current constructed wetland is made up of one-level A/O artificial swamp and secondary A/O artificial swamp, above-mentioned one-level A/O artificial swamp is by anaerobic treatment unit a (1), aerobic treatment unit b (2), aerobic treatment unit c (3) forms, aerobic treatment unit c (3) is communicated with anaerobic treatment unit a (1), secondary A/O artificial swamp is by anaerobic treatment unit a ' (4), aerobic treatment unit b ' (5), aerobic treatment unit c ' (6) forms, and aerobic treatment unit c ' (6) is communicated with anaerobic treatment unit a ' (4).
3. two-stage A/O type vertical flow artificial wetland sewage treatment system device according to claim 1 and 2, it is characterized in that being filled with in each processing unit of described multistage vertical current constructed wetland and account for total filler volume 70% dehydration sludge of drinking water, gravel and soil, wherein the top layer of weighting material is a pedosphere, pedosphere is the sludge blanket and the gravel bed of alternately filling down, and the grain-size grade of described sludge blanket from top to bottom successively decreases.
4. two-stage A/O type vertical flow artificial wetland sewage treatment system device according to claim 1 and 2, each processing unit that it is characterized in that described multistage vertical current constructed wetland is equipped with water distribution system, suction pump and magnetic valve, and all pumps connect control by PLC programmable controller (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101902421A CN101205097A (en) | 2007-11-22 | 2007-11-22 | Two-stage A/O vertical flow artificial wetland sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101902421A CN101205097A (en) | 2007-11-22 | 2007-11-22 | Two-stage A/O vertical flow artificial wetland sewage treatment system |
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| CN101205097A true CN101205097A (en) | 2008-06-25 |
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| CNA2007101902421A Withdrawn CN101205097A (en) | 2007-11-22 | 2007-11-22 | Two-stage A/O vertical flow artificial wetland sewage treatment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745954A (en) * | 2019-11-28 | 2020-02-04 | 云南大学 | Composite sewage treatment device and method for tidal flow artificial wetland coupling biological contact reaction tank |
| CN115215516A (en) * | 2022-09-20 | 2022-10-21 | 湖南中拓环境工程有限公司 | Heterocyclic wastewater biochemical treatment device and process thereof |
| CN116216906A (en) * | 2023-03-02 | 2023-06-06 | 温州大学 | Device suitable for advanced treatment of tail water of sewage biochemical process and application method of device |
-
2007
- 2007-11-22 CN CNA2007101902421A patent/CN101205097A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745954A (en) * | 2019-11-28 | 2020-02-04 | 云南大学 | Composite sewage treatment device and method for tidal flow artificial wetland coupling biological contact reaction tank |
| CN115215516A (en) * | 2022-09-20 | 2022-10-21 | 湖南中拓环境工程有限公司 | Heterocyclic wastewater biochemical treatment device and process thereof |
| CN116216906A (en) * | 2023-03-02 | 2023-06-06 | 温州大学 | Device suitable for advanced treatment of tail water of sewage biochemical process and application method of device |
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