CN102249478B - Deep nitrogen and phosphorus removal process for surface water body - Google Patents
Deep nitrogen and phosphorus removal process for surface water body Download PDFInfo
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention provides a deep nitrogen and phosphorus removal process for a surface water body. The process mainly comprises six working sections, such as contact oxidation, rapid filtration, anaerobic denitrification, flocculation reaction, phosphorus sediment removal and phosphate removal through adsorption. The process is realized on the basis of improvement, strengthening and combination of the traditional treatment processes integrates a biological method, a chemical method and a physical method and is used for removing various pollutants in the water body effectively; the sewage purifying efficiency is remarkably increased; and an entire treatment device is free from odor and secondary noise pollution; a natural flow type combination mode is adopted in the design without any multistage elevating pump or reflux pump; a back washing system is arranged in a rapid filter and used for periodic back-washing, so that the problems of blocking and power consumption are solved; and the entire process has the advantages of full automation, no need of manual guard, and convenience for management and maintenance.
Description
(1) technical field
The present invention relates to a kind of advanced nitrogen dephosphorization process of surface water body.
(2) background technology
In recent years, along with the fast and stable development of economy, most of surface water of China and underground water have all received pollution in various degree.According to NEPA 2003,2006 and 2009 " China Environmental State Bulletin " report, state control emphasis lake to be monitored, principal pollutant are total nitrogen (TN) and total phosphorus (TP).China's water resources ownership per capita is few, and water resources is not enough and the water environment pollution problem seriously restricts social economy's sustainable development, harm ecotope and influence people ' s health.The control of each form N, P becomes the main task of water pollution control gradually in the river course.
General urban river water system bearing hold the rain flood passage, divide flow down ooze, alleviate tropical island effect, create beautiful environment, many-sided function such as protection species diversity; Be society, the economic and natural compound ecosystem, unique view glamour and ecological, environmental protective are worth.Along with urbanization process is accelerated, the rapid expansion of city size, network of waterways hydrology vigor disappears gradually, even causes cutout, causes network of waterways self-purification capacity to weaken, and ecotope and environment for human survival are on the hazard.Urban water conservancy engineering is in the past only considered functions such as neatization, few occupation of land, water delivery, antiseepage, drainage and flood control; And reinforcement and the construction of peripheral ecotope of the natural purification function in river course have been ignored; Thereby caused riverbank vegetation, hydrobiont to be isolated by river course embankment, concrete revetment, material cycle is obstructed, so that the self-purification capacity of water body weakens; The eutrophication degree increases, the Ecosystem Service forfeiture that urban river should exist.
For the restoration of the ecosystem and maintenance technology of urban water-body, the researchist has done significant analysis and discussion from ecological view both at home and abroad, and has obtained some measure of urban water-body ecological management and correlation experience on this basis.Usually, developed country is after water body point source, pollution of area source are controlled in the world, and the control that water pollutes progressively forwards the reparation aspect of water surrounding to.Can make up the urban ecology water system with water quality maintenance technology as a whole and reduce the following aspects:
(1) water system strengthened purification regulation: technology commonly used has diversion dilution, low mud dredging, river aeration, throwing bacterium, biomembrane purification and hydrobiological purification techniques or the like.American-European countries is tending to the direct aeration in river course, channel cleanout, restoring river two sides wetland more and is recovering the natural purification mode in snakelike river course etc. aspect the river purification.But the common quantities of these modes is big, and disposable input expense is surprising.
(2) structure of bank zoology and ecological revetment: divide the natural landscape (like massif, greenery patches, center etc.) of excavating river course bank,, view is introduced in the river course scope, form scenery with hills and waters and melt ecosystem mutually through road greenbelt, sight line vestibule.Make full use of ecological bank band both at home and abroad city surface source pollution is held back, guarantee to get into the water quality of water body.This technical characterstic is exactly that technology is simple, cost and maintenance cost are cheap, and ecological environment benefit is remarkable, can adapt to the unstable characteristic of non-point pollution.But the technology only to xenobiotic pollutants hold back the water body DeGrain that endogenous pollution is serious.
(3) moisturizing and running water scheduling: this technology is when strengthening water ecology improvement; Also the mutual relationship between different water systems is started with; The land productivity of making the best use of the situation recovers with the water system streamflow regime and improves river ecosystem, the management that effectively utilize the diversion dirt removal, improves means reinforcement water systems such as water system ecological functions.Simultaneously, in conjunction with urban flood defence, adopt the theory of harnessing the river of " stifled dredging combines, holds to let out and lay equal stress on "; The respect for nature rule gives the river necessary space, increases the water-carrying section in river, gives flood with outlet, and this is the new concept of modern flood control planning.Moisturizing and running water scheduling have been considered the water system balance of ecosystem from hydromechanics and science of water resources, and quantities is huge, final-period management difficulty problem but also have, and can be used as useful the replenishing under the emergency case.
(4) Ecological Recovery of Water: technology main concern water body and incident space species diversity, Harmony, stability comprise the ecological dredging of bed mud, river channel ecology shore protection, aquatic animals and plants and light greenization of shore etc.Be one of the most rising technology that is considered at present, it has considered the regulation and the structure of water system from the angle of restoration of the ecosystem, but will see normally process that effect is slow and very long of restoration of the ecosystem equally.This technology is according to network of waterways water environment situation; To reduce the ecological riverway pollutant load is major objective; Integrated utilization physics, chemistry and biological means; Carrying out river water quality and improve technical study, is the denitrogenation of main purpose deep phosphorous removal to reduce surface water body nutritive salt, makes the water quality of surface drainage system meet surface water IV class water quality standard.
(3) summary of the invention
The city river water quality constantly worsens; Eutrophication is serious; To this present situation; The objective of the invention is to obtain a kind ofly have that higher treatment effect, robotization control, working cost are low, the on-the-spot disposal novel technique of non-secondary pollution, convenient management, guarantee that water outlet reaches " water environment quality standard " (GB3838-2002) III class water quality standard, cuts down the nutritive salt in the water body to greatest extent.
The technical scheme that the present invention adopts is:
A kind of advanced nitrogen dephosphorization process of surface water body, said technology mainly comprises:
(1) catalytic oxidation: will introduce contact-oxidation pool from the sewage of the surface water body pipeline at the bottom of by the pond and carry out oxide treatment 0.4h～1.5h; Be furnished with the soft biologic packing material that accounts for contact-oxidation pool body volume 1/3～1/2 in the said contact-oxidation pool, and be provided with aeration blower; Said soft biologic packing material is the filler of the common biofilm carrier type in this area, comprising: industrialized biologic packing material has: ZH901 elastic solid filler, Natrix floating stuffing etc.The effect of this step is ammonia nitrogen and the organism of removing in the sewage; The extension membrane process of biologic packing material is the mode through natural membrane, does not need to add in addition its nutritive element or organism, and domestication (extension film) time in early stage approximately is 40 days;
(2) filter fast: got in the quick filtering basin that are filled with silica sand by the effusive sewage of contact-oxidation pool and filter, said quick filtering basin bottom is provided with gas blower, and water body is carried out back flushing; This step effect is the microbial film that comes off in solid suspension impurity and the contact-oxidation pool in the filtered water;
(3) double oxygen denitrification: get into oxygen compatibility pool by the effusive waste water of quick filtering basin, carry out anti-nitration reaction 1h～2.5h and remove the nitrate nitrogen in the waste water; Be provided with in the said oxygen compatibility pool account for oxygen compatibility pool pond body volume 60～80% haydite as filling carrier, also be evenly distributed with the carbon source that accounts for oxygen compatibility pool pond body volume 0.2%～0.8% in the packing layer; Carbon source can adopt solid carbon source, and to avoid the outer drawback that adds liquid carbon source control aspect, this stage is mainly removed the nitrate nitrogen that accumulates out in Aerobic Pond and the quick filtering basin, finally reaches the purpose of removing TN through denitrification; DO is controlled at 0.8mg/L;
(4) flocculation reaction: get into flocculation basin by the effusive waste water of oxygen compatibility pool, add flocculation agent, utilize the interior aeration blower of flocculation basin to blast pressurized air and stir by 2～6mg/L input amount; This step is to utilize flocculation, chemical settling process that the phosphorus of free state in the water is transferred in the flco;
(5) dephosphorization deposition: the flocculation basin water outlet is got in the pond by dephosphorization settling tank middle part, and the supernatant of post precipitation gets into the adsorption and dephosphorization pond through the inclined tube filler in the pond, and throw out is through pond bottom blowdown tube drainage; This step effect is to make the flco precipitate and separate that generates in the flocculation tank, and this part phosphorus is removed;
(6) adsorption and dephosphorization: get into the adsorption and dephosphorization pond by the effusive waste water of dephosphorization settling tank by the bottom, upwards ANTHRACITE FILTER MEDIA dephosphorization in the pond, said ANTHRACITE FILTER MEDIA packing volume is 1/3～1/2 of an adsorption and dephosphorization pond volume, treat effluent is through the effluent weir discharging; This step effect is the phosphorus of further removing in the sewage.
Said surface water water intaking can adopt the diving lift pump to promote, and lift pump is installed on the support that is fixed in the river revetment, easy access and maintenance.
After ANTHRACITE FILTER MEDIA absorption in the said adsorption and dephosphorization pond is saturated, reclaims filler and carry out reusing after the activation; Said activation method is following: earlier with 20～30% hydrochloric acid or sulfuric acid scrubbing, then with the washing of 30～40% sodium hydroxide, extremely neutral with the clear water washing at last.
Preferably, the used carbon source of step (3) is the solid slow-release carbon source, and said solid slow-release carbon source prepares as follows: take by weighing starch 40～50g; Add an amount of aqueous solvent and under whipped state, be heated to the gelatinization dissolving; Keep 1～2h, under 90～95 ℃ of water bath condition with dissolve 60～70g Z 150PH of getting well and mix and stir, be cooled to normal temperature; Put to refrigerator; Carry out the freeze-thaw process repeatedly 4 times, it is subsequent use that resulting product is placed 4 ℃ of refrigerators preservations, and said starch is wheat starch, W-Gum, yam starch or tapioca(flour).
Preferably, the used flocculation agent of step (4) is the mixture of polymer alumina and SEPIGEL 305 mass ratio 8～12: 1.
The present invention adopts the denitrogenation of modified version BAF, enhanced coagulation deposition dephosphorization and quick adsorption filtration combination process to realize the advanced treatment to face of land micropollutant water.
Along with the quick propelling of urbanization process, urban ecology water system function more and more comes into one's own, but the function of urban ecology water system is along with the aggravation of polluting more and more is on the hazard at present.How to keep ecological water system water body cleaning, safety to become the task of top priority.The present invention has avoided tradition to the low problem of the more single purification efficiency of river course treatment technology, through the form of biological process and physico-chemical process combination micropollutant water is efficiently handled.Biological contact oxidation pond, deoxidation pond and oxygen compatibility pool can with indigenous microorganism in the river course a large amount of hold back and breed growth; Form strong and stable microbial film; Through filtration hold back, biological oxido reduction and biological flocculation be mainly used in and remove organic pollutant, suspended particulate and nitrate pollution in the body of river; Supply with through the continuous electronics of solid slow-release carbon source,, guarantee to react normal operation for denitrification flora in the oxygen compatibility pool provides nutritive substance.Coagulation basin, dephosphorization settling tank and adsorption tank are mainly used in to be removed the phosphorus in the water body.Phosphorus is able to remove at settling tank through solid-liquid separation method with the insoluble phosphate colloid, through hard coal water outlet is further purified at last, guarantee that finally water outlet is to COD, NH with efficient absorption phosphorus ability
4 +-N, NO
3 -The maximization of materials such as-N, TN, TP, SS, Chl-a is removed, and reaches " water environment quality standard (GB3838-2002) III class water quality standard.For the solid-state carbon source of starch that adopts in the experiment, its life cycle is longer; And silica sand can reuse owing to back flushing regularly, and the high adsorption capacity filler reaches 2mg/g to the adsorptive capacity of phosphorus, can reach 2 years for handling this covering device of micropollutant water life cycle.The present invention does not control temperature, and purpose is to understand the treatment effect of Various Seasonal.
Beneficial effect of the present invention is mainly reflected in:
1) the indigenous bacterial classification of employing natural water has been realized the high prolificacy from culturing micro-organisms under test domestication condition; Do not add other external microbial strainss, thereby prevented invasion and the pollution of external mikrobe; The water outlet biological activity is high, helps the restoration of the ecosystem of water body self;
2) oxygen compatibility pool add unique denitrogenation material solid slow-release carbon source (C-80) as the carbon source (electron donor) of denitrification flora with adhere to carrier, avoid tradition to add the unmanageable drawback of liquid carbon source outward;
3) on traditional treatment process basis, improving reinforcement and combination, is one with biological process, chemical method and physics method collection, effectively removes all contaminations in the water body, has significantly improved wastewater purification efficiency, and the entire treatment device does not have foul smell and noise secondary pollution;
4) adopt spontaneous current dynamic formula array mode in the design, need not multistage lift pump and reflux pump; Rapid filter is arranged back-purge system, and back flushing has regularly solved obstruction and power consumption problem; The full-automatic operation of whole technology does not need artificial guard, and management maintenance is convenient;
(4) description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is that 4 kinds of synthetic carbon source materials are released carbon power curve figure respectively in zero(ppm) water and river.
(5) embodiment
Below in conjunction with specific embodiment the present invention is described further, but protection scope of the present invention is not limited in this:
Embodiment 1: the solid carbon source preparation
Adopt starch as carbon source, Z 150PH is a framework construction slowly-releasing carbon source material.Choose wheat, corn, yam, tapioca(flour) respectively and prepare slowly-releasing organic carbon source material C-80 through blend of solution wet method and low temperature frozen glue forming technique, concrete grammar is following:
Take by weighing starch 40g, add an amount of aqueous solvent and under whipped state, be heated to gelatinization dissolving, performance different characteristic during different starch pasting; Keep 1h; Under 95 ℃ of water bath condition with dissolve good 60g Z 150PH and mix and stir, be cooled to normal temperature, put to cryogenic refrigerator; Carry out the freeze-thaw process repeatedly 4 times, resulting product is placed 4 ℃ of refrigerators and is preserved subsequent use.
Cassava is in lasting release conditions in zero(ppm) water, whole denitrification percent is not high; It is slower that corn is released carbon ratio, and nitric efficiency is minimum; Yam and wheat are released the carbon similar performance and are fluctuation, and all have higher denitrification effect, and denitrification percent is more than 90%.Organic burst size γ
Cassava＞γ
Wheat＞γ
Corn≈ γ
Ma Ling PotatoPreceding 7d denitrogenation meets zero level denitrification kinetic equation, and through the later stage checking, the denitrogenation cycle of yam and two kinds of carbon sources of wheat is 7d.In latter stage, pH remains on 6.75～7.68 in the lake water reaction unit at each synthetic materials place.Comparatively speaking, the yam synthetic materials shows good characteristic in organic matter release and nitrate salt degradation process.
Embodiment 2:
Equipment therefor of the present invention is following:
1. water intaking lift pump
Water intaking adopts the diving lift pump to promote, and lift pump is installed on the support that is fixed in the river revetment, easy access and maintenance.Grid is set around the lift pump, and the big foreign material of interception size prevent the obstruction of follow-up pipeline.
Major equipment
According to the processing power of treatment unit, adopt 2 of proof submersible sand discharging pumps (the using and the reserved).
Model: WQ80-60-15-8.0,8.0kW, Q=80m
3/ h, H=15m, VFC.
Mounting and fixing bracket is one in addition, grid one cover.
One on vacuum breaker is installed on the outlet conduit, and one under meter is used to show instantaneous delivery.
2. denitrogenation dephosphorizing pond
The denitrogenation dephosphorizing pond is divided into purification system core structures; Accomplish the removal of pollutents such as organism, suspended substance and nitrogen phosphorus; Mainly combine the process of the oxidation of completion ammonia nitrogen, denitrification, chemical dephosphorization and the adsorption and dephosphorization of nitric nitrogen for 6 sections by contact-oxidation pool, quick filtering basin, oxygen compatibility pool, flocculation tank, dephosphorization settling tank and adsorption and dephosphorization etc.
(1) contact-oxidation pool
Function: the ammonia nitrogen in the river, organism transform removal in contact-oxidation pool
Design variable:
Tankage is 18m
3, steelwork.
Pond base fabric water pipe water inlet; The soft-filler (ZH901 elastic solid filler, Zhejiang Yuhuan Zhenxing Environmental Protection Equipment Co., Ltd.) of arranging
is used for system's microorganism colonization (account for whole pond volume 1/3).
One of aeration blower is set, and form is rotary blower: Q=1.0m
3/ h, H=60Kpa, 1.0kW, VFC; Aeration intensity is: 3m
3/ (m
2H), HTR is 0.4h.
Operation scheme: operation continuously.
(2) quick filtering basin
Function: filling silica sand in the quick filtering basin, the microbial film that comes off in solid suspension impurity in the filtered water and the contact-oxidation pool.
Design variable:
Tankage is 21.6m
3, steelwork.
The pond base fabric is put the back flushing water pipe, utilizes intake pump to carry out back flushing (with the rotary blower in (1) contact-oxidation pool).
Operation scheme: normally operate to the filtration state, look the back flushing of pressure-losses situation.
Main raw: gravel is laid 0.3m as supporting layer; Silica sand is laid 0.7～1.0m as filtering layer.
(3) oxygen compatibility pool
Function: it is carbon source and the carrier of the C-80 of feedstock production as the denitrification flora that oxygen compatibility pool adopts with the yam starch; Can avoid the outer drawback that adds liquid carbon source control aspect; This stage is mainly removed the nitrate nitrogen that accumulates out in Aerobic Pond and the quick filtering basin, finally reaches the purpose of removing TN through denitrification.
Design variable:
Tankage is 42m
3, steelwork.
Operation scheme: the oxygen condition (control DO is about 0.8mg/L) that keeps when normally moving holding concurrently, utilize the bottom to divide the gravel water distribution.
Main raw: gravel is laid 0.3m as supporting layer; (particle diameter is 3～5cm) as the aerating biological filter pool filler carrier to haydite, accounts for 75% (v/v) in whole pond; C-80 is laid in as denitrification solid slow-release carbon source in the middle of the ceramics filling layer, and usage quantity is 0.5% (v/v) that whole pond holds.
(4) flocculation tank
Function: the place of flocculant concentration, mixing and precipitin reaction, utilize pressurized air to stir.Utilize flocculation, chemical settling process that the phosphorus of free state in the water is transferred in the flco.
Design variable:
Tankage is 12m
3, steelwork.
Operation scheme: (polymer alumina PAC+ SEPIGEL 305 PAM is according to 10: 1 proportionings of mass ratio for medicament; Dosage is 4mg/L) add from the top, pond; Utilize the pressurized air of aeration blower (with the rotary blower in (1) contact-oxidation pool) to stir, aeration intensity is: 1.8m
3/ (m
2H).
Main raw:
boring aeration pipe 2m.
(5) dephosphorization settling tank
Function: the flco precipitate and separate that generates in the flocculation tank, this part phosphorus is removed.Inside, pond adds the inclined tube filler, increases to remove efficient.
Design variable:
Tankage is 33.6m
3, steelwork.
Operation scheme: the flocculation tank water outlet gets into settling tank from the middle part, pond, and clear water gets into the adsorption and dephosphorization pond through the inclined tube filler, and throw out is through the bottom blow-down tube drainage.
Main raw:
Inclined tube filler 7m
3
(6) adsorption and dephosphorization pond
Function: the high adsorption capacity filler that filters out in the lab scale in experiment reaches 2mg/g to the adsorptive capacity of phosphorus, and filling adsorption saturated after, can carry out activation to filler, realize its recycling.Draw through the lab scale experimental comparison, adsorption stuffing is to micropollutant water, and phosphorus can be controlled in below the 0.02mg/L.
Design variable:
Tankage is 36m
3, steelwork.
Operation scheme: the settling tank water outlet is upwards flow through the suction phosphate material through bottom gravel water distribution, and treating water is through the effluent weir discharging.
Main raw: it is 1/3 of pond appearance that hard coal lays volume.
(7) sludge sump
Function: collect each pond mud, discharging regularly or outward transport are handled.
Design variable:
Tankage is 7.7m
3, steelwork.
3. miscellaneous equipment
Flocculation agent dissolves joins throwing device
Function: with solid-state flocculation agent dissolving, solution is added to flocculation tank through mechanically actuated diaphragm metering pump.
Major equipment: 800L PE adds 1 of explosive barrel.
1 of 20L/h mechanically actuated diaphragm metering pump.
According to the said apparatus design,, built a day processing 2000m to certain river course river in the Xiangfan City
3Surface water deep phosphorous removal denitrogenation on-the-spot disposal device, adopt the microbial acclimation in early stage, through augmented flow method progressively river water body is carried out advanced treatment.Water inlet is promoted by lift pump and gets into biological contact oxidation pond, lift pump outlet design discharge meter, control pump capacity; Biological contact oxidation pond is to hang the film filler to adopt the rotary type blower fan to carry out aeration with the soft fiber; Water outlet overflows to rapid filter, rapid filter bottom design back flushing pipeline, and back flushing regularly avoids taking place stopping state.The deoxidation pond is passed through in the water outlet of rapid filter from bottom to top, and purpose is to reduce the DO in the water body, for follow-up denitrification provides favourable condition; Oxygen compatibility pool adopts haydite and C-80 slowly-releasing filler mainly to realize the denitrification of nitrate, reaches the purpose of removing TN; Water outlet flows into flocculation tank and under agitation condition, carries out enhanced coagulation, carries out solid-liquid separation at the dephosphorization settling tank; Supernatant flows through the hard coal filler unit from bottom to top, finally flows into the lake body.Regularly sampling monitoring is carried out in each reaction unit water outlet, when under a permanent flow, when stable, continue enlargement discharge and detect, concrete Inlet and outlet water index is seen table 1.
Table 1: main water-quality guideline of river and set(ting)value
| Numbering | Title | Content range/average | Average | Set(ting)value |
| 1 | pH | 5.64～8.32 | 7.43 | 6～9 |
| 2 | SS(mg/L) | 8～24 | 13 | Do not have |
| 3 | Visibility (cm) | 80～140 | 110 | - |
| 4 | TP(mg/L) | 0.010～0.090 | 0.057 | ≤0.015 |
| 5 | COD(mg/L) | 0.000～52.224 | 33.851 | ≤20 |
| 6 | Chl-a(μg/L) | 0.00～90.09 | 18.769 | ≤4 |
| 7 | NH 4 +-N(mg/L) | 0.231～0.885 | 0.573 | ≤1 |
| 8 | NO 2 --N(mg/L) | 0.009～0.571 | 0.117 | - |
| 9 | NO 3 --N(mg/L) | 0.168～2.168 | 1.148 | - |
| 10 | TN(mg/L) | 0.787～7.810 | 4.672 | ≤1 |
Claims (4)
1. the advanced nitrogen dephosphorization process of a surface water body, said technology mainly comprises:
(1) catalytic oxidation: will introduce contact-oxidation pool from the sewage of the surface water body pipeline at the bottom of by the pond and carry out oxide treatment 0.4h～1.5h; Be furnished with the soft biologic packing material that accounts for contact-oxidation pool body volume 1/3～1/2 in the said contact-oxidation pool, and be provided with aeration blower;
(2) filter fast: got in the quick filtering basin that are filled with silica sand by the effusive sewage of contact-oxidation pool and filter, said quick filtering basin bottom is provided with gas blower, and water body is carried out back flushing;
(3) double oxygen denitrification: get into oxygen compatibility pool by the effusive waste water of quick filtering basin, carry out anti-nitration reaction 1h～2.5h and remove the nitrate nitrogen in the waste water; Be provided with in the said oxygen compatibility pool account for oxygen compatibility pool pond body volume 60～80% haydite as filling carrier, also be evenly distributed with the slowly-releasing carbon source that accounts for oxygen compatibility pool pond body volume 0.2%～0.8% in the packing layer;
(4) flocculation reaction: get into flocculation basin by the effusive waste water of oxygen compatibility pool, add flocculation agent, utilize the interior aeration blower of flocculation basin to blast pressurized air and stir by 2～6mg/L input amount;
(5) dephosphorization deposition: got in the pond by dephosphorization settling tank middle part by the effusive waste water of flocculation basin, the supernatant of post precipitation gets into the adsorption and dephosphorization pond through the inclined tube filler in the pond, and throw out is through pond bottom blowdown tube drainage;
(6) adsorption and dephosphorization: get into the adsorption and dephosphorization pond by the effusive waste water of dephosphorization settling tank by the bottom, upwards ANTHRACITE FILTER MEDIA dephosphorization in the pond, said ANTHRACITE FILTER MEDIA packing volume is 1/3～1/2 of an adsorption and dephosphorization pond volume, treat effluent is through the effluent weir discharging.
2. technology as claimed in claim 1, it is characterized in that ANTHRACITE FILTER MEDIA absorption in the said adsorption and dephosphorization pond is saturated after, reclaim filler and carry out reusing after the activation; Said activation method is following: earlier with 20～30% hydrochloric acid or sulfuric acid scrubbing, then with the washing of 30～40% sodium hydroxide, extremely neutral with the clear water washing at last.
3. technology as claimed in claim 1; It is characterized in that the used slowly-releasing carbon source of step (3) prepares as follows: take by weighing starch 40～50g, add an amount of aqueous solvent and under whipped state, be heated to the gelatinization dissolving, keep 1～2h; Under 90～95 ℃ of water bath condition with dissolve good 60～70g Z 150PH and mix and stir; Be cooled to normal temperature, put, carry out the freeze-thaw process repeatedly 4 times to refrigerator; It is subsequent use that resulting product is placed 4 ℃ of refrigerators preservations, and said starch is wheat starch, W-Gum, yam starch or tapioca(flour).
4. technology as claimed in claim 1 is characterized in that the used flocculation agent of step (4) is the mixture of polymer alumina and SEPIGEL 305 mass ratio 8～12: 1.
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| CN102627822B (en) * | 2012-04-17 | 2013-07-31 | 合肥工业大学 | Modified PVA (Polyvinyl Alcohol)-starch controlled-release carbon source material and preparation method thereof |
| CN102815785A (en) * | 2012-08-30 | 2012-12-12 | 北京工业大学 | Preparation method of encapsulated solid-phase slow-release composite carbon source |
| CN103265144B (en) * | 2013-05-16 | 2014-03-12 | 安徽华骐环保科技股份有限公司 | Town wastewater treatment process and device with intensified nitrogen and phosphorus removing function |
| CN103382075A (en) * | 2013-07-29 | 2013-11-06 | 中国科学院城市环境研究所 | Bypass purification system for treating slightly polluted river water |
| CN105800791B (en) * | 2016-05-04 | 2019-01-04 | 江南大学 | A method of using polycaprolactone and the denitrogenation of haydite strengthened artificial wet land |
| CN106977749A (en) * | 2017-04-14 | 2017-07-25 | 成都衔石科技有限公司 | A kind of lignin filters sedimenting system |
| WO2020052086A1 (en) * | 2018-09-14 | 2020-03-19 | 江苏中车环保设备有限公司 | Upgrading device and system suitable for distributed domestic sewage treatment in towns and villages |
| CN109970133A (en) * | 2019-01-24 | 2019-07-05 | 玉溪师范学院 | The porous ecological assemblage device and its technique of sewage plant level-one A Tailwater Depth processing |
| CN110156258A (en) * | 2019-05-21 | 2019-08-23 | 兴源环境科技股份有限公司 | A kind of advanced sewage treatment system and technique |
| CN114790069B (en) * | 2022-04-14 | 2023-12-22 | 北控技术服务(广东)有限公司 | Biological dephosphorization effect evaluation method for municipal wastewater treatment plant |
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| CN2481707Y (en) * | 2001-06-18 | 2002-03-13 | 大庆市北盛有限公司 | Process for high-efficiency treating sewage by denitrogenation and dephosphorization |
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| CN101514068A (en) * | 2009-04-01 | 2009-08-26 | 哈尔滨工业大学 | Method for employing anaerobic-aerobic combined biological filter to process domestic sewage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481707Y (en) * | 2001-06-18 | 2002-03-13 | 大庆市北盛有限公司 | Process for high-efficiency treating sewage by denitrogenation and dephosphorization |
| CN1715217A (en) * | 2004-07-02 | 2006-01-04 | 桂林工学院 | Process for removing nitrogen and phosphor from sewage capable of being built by separate periods |
| CN101514068A (en) * | 2009-04-01 | 2009-08-26 | 哈尔滨工业大学 | Method for employing anaerobic-aerobic combined biological filter to process domestic sewage |
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