CN101913736A - Corridor-type multi-area domestic sewage advanced treatment system and treatment method - Google Patents

Corridor-type multi-area domestic sewage advanced treatment system and treatment method Download PDF

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Publication number
CN101913736A
CN101913736A CN2010102548116A CN201010254811A CN101913736A CN 101913736 A CN101913736 A CN 101913736A CN 2010102548116 A CN2010102548116 A CN 2010102548116A CN 201010254811 A CN201010254811 A CN 201010254811A CN 101913736 A CN101913736 A CN 101913736A
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China
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area
filler
aeration
sewage
treatment
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CN2010102548116A
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Chinese (zh)
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任洪强
牛川
丁原红
郭瑞昕
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Nanjing University
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Nanjing University
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Priority to CN2010102548116A priority Critical patent/CN101913736A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/33Wastewater or sewage treatment systems using renewable energies using wind energy

Abstract

The invention discloses a corridor-type multi-area domestic sewage advanced treatment system and a corridor-type multi-area domestic sewage advanced treatment method and belongs to the field of sewage treatment. The treatment system comprises filler areas and aeration areas, wherein a first-level filler area is formed at a water inlet and is sequentially connected with an aeration area, a second-level filler area, an aeration area and a third-level filler area. The treatment method comprises the following steps that: domestic sewage enters the first-level filler area through the water inlet and performs film formation on the filler to realize synchronous denitrogenation; sewage flows are combined in the aeration area, and a rotary brush is driven to rotate by fan wings; the aerated sewage enters the second-level filler area, and the second-level filler area is driven to rotate by wind power to realize film formation and pollutant adsorption; the sewage output by the second-level filler area again goes through the rotary brush aeration area and is aerated again; and the aerated sewage enters the third-level filler area in which the filler is elastic three-dimensional filler, and the sewage is treated and drained. The system is convenient to install, move and combine and the filler is convenient to adjust and replace; and the system and the method have the characteristics of energy conservation, environmental protection, low purchasing cost, low operation cost and the like.

Description

A kind of corridor-type multi-area domestic sewage advanced treatment system and treatment process
Technical field
The invention belongs to a kind of advanced treatment system and method thereof in the water treatment field, particularly a kind of corridor-type multi-area domestic sewage advanced treatment system and treatment process.
Background technology
Along with the quickening and the growth in the living standard of urbanization speed, the quantity discharged of city domestic sewage also increases year by year.The city domestic sewage pollutant load mainly is an organism, as starch, fat, protein, Mierocrystalline cellulose, carbohydrate, mineral wet goods, wherein COD Cr, BOD 5, TKN (kjeldahl nitrogen), TN, TP be also higher.Sanitary sewage is COD after one-level physical treatment, secondary biochemical treatment Cr, BOD 5, TKN, NH 3-N etc. reduce significantly, but TN, TP are still higher, enter the eutrophication that easily causes water body behind the water body, make the breeding of algae raised growth, cause red tide and wawter bloom.The plasmic composition of algae bio is C 106H 263O 110N 16P contains a spot of nitrogen, phosphorus as can be known and just can impel the algae raised growth in the water, and when algae metabolism mass mortality, just makes the corrupt smelly water quality deterioration of waters water body.
State Environmental Protection Administration has formulated " control is two up to standard " about carrying out gross contamination emission control and the general policy up to standard to the source of pollution undertake treatment within a prescribed limit of time.In order to realize that the total amount of pollutant is controlled, revise and improved the emission standard and the urban wastewater treatment firm pollutant emission standard of the first kind and second pollutant again, the measure that these are great and the promulgation of policies and regulations have proposed requirements at the higher level to municipal sewage treatment.
According to the town sewage plant pollutant emission standard of China's new promulgation in 2002, the municipal wastewater treatment plant discharging will reach one-level A standard (COD CrBe 50mg/L) and one-level B standard (COD CrBe 60mg/L), most Sewage Plant do not reach first discharge standard far away.
There is following several problem in conventional at present municipal effluent activated carbon advanced treatment process: in (1) activated carbon advanced treatment process, activated carbon regeneration is a difficult problem always, causes the high and advanced treatment effect instability of working cost; (2) city domestic sewage is through after the secondary biochemical treatment, and organic concentration reduces greatly, has influenced the processing efficiency of ozone oxidation, and ozonizer is difficult to the city domestic sewage of coupling high flow capacity simultaneously.
City domestic sewage, if reaching the water quality of production reuse with traditional secondary biochemical treatment processing requirement is difficult, for improving the city sewage deep treatment effect, be necessary for town domestic sewage factory brand-new sewage solution is provided, problems such as particularly low at follow-up advanced treatment efficient, energy consumption height need to propose feasible, economic, solution efficiently.
The brush aeration device claims Kai Sennaier (Kessener) brush aerator again, is to be popular a kind of old-fashioned aerating apparatus in Europe, and it is that the aerating apparatus that changes brush is set in the oxidation ditch of biological wastewater treatment.It is made up of cylindrical shell, and the cylindrical shell periphery has and stretches into steel wool in the waste water.The cylindrical shell adjoined water surface, level is installed.Rotating cylinder is by electric motor driving, and rotation makes the waste water of constantly kicking up pass the aeration tank rapidly, and acceleration cycle is used, and makes in the air admission water.Oxygen transfer rate reaches 1.2~2.4kgO 2/ (kWh).
Summary of the invention
In order to solve the deficiency of existing advanced treatment purification techniques, the purpose of this invention is to provide a kind of corridor-type multi-area domestic sewage advanced treatment system and treatment process, utilize brush aeration and the immersion filling tube combination process of wind energy as motivating force, it can carry out the significant depth processing to sanitary wastewater and Sewage Plant tail water pollutent, at utmost reduce energy expenditure, increase rate of mass transfer, improve coefficient of oxygen utilization, fully reach the effect of advanced treatment.
The technical solution adopted for the present invention to solve the technical problems is: a kind of corridor-type multi-area domestic sewage advanced treatment system, comprise packing area and aeration zone, the water inlet place establishes the one-level packing area, connects aeration zone, secondary packing area, aeration zone and three grades of packing areas thereafter successively.
A kind of corridor-type multi-area domestic sewage deep treatment method the steps include: that (a) sanitary sewage enters the one-level packing area by water inlet, and sanitary sewage carries out biofilm to filler, and two-layer inside and outside dividing after the biofilm, internal layer is anaerobic environment, realizes simultaneous denitrification; (b) current import the aeration zone by the one-level packing area, change brush and drive rotation by awe, make the dissolved oxygen in the water return to metastable state; (c) sewage through aeration enters the secondary packing area, drives the packing area rotation by wind-force, realizes the absorption of biofilm and pollutent; (d) the brush aeration district is passed through in the water outlet of secondary packing area once more, and sewage is carried out aeration again; (e) sewage through aeration enters three grades of packing areas, and this district's filler is an elastic solid filler, and sewage is discharged after treatment.
As the basic technology unit, the alternate combination with the brush aeration district in packing area is established the one-level packing area at water inlet, lays brush aeration district and two, three grades of packing areas successively, reaches the effect of multistage advanced treatment waste water with packing area and brush aeration district in the present invention.Ball-type packing is adopted in water inlet one-level packing area, does not establish aerating apparatus, and the microbial film after the Ball-type packing biofilm divides inside and outside two-layer, when microbial film reaches certain thickness, can play the effect of synchronous nitration and denitrification, realizes the removal to ammonia nitrogen.The brush aeration district is a core with custom-designed brush aeration device, and bearing and windmill fin are one, in rotation process, changes brush waste water is constantly stirred, and increases the contact area of waste water and air, arrives the aeration effect.Enter the secondary packing area through the waste water of aeration, secondary packing area filler is that polyethylene is rigid filled, and waste water fully contacts with filler in the immersion filler rotating cylinder; Because waste water is through abundant aeration, the microorganism in the microbial film of packing area is based on aerobic bacteria, and microbial film thickness is moderate, and filler moves under the stirring of current, with the pollutent thorough mixing, has improved mass-transfer efficiency greatly.The filler different with the I and II packing area taked in three grades of packing areas, is elastic solid filler, to reach the treatment effect that different fillers are had complementary advantages; Two, reflux is established in three grades of packing areas, circular treatment can be carried out in sewage backflow to one-level packing area.
The immersion filler rotating cylinder that the present invention uses is right cylinder, with screen cloth biologic packing material is wrapped in the tube, in the technology initial launch stage, need filler is carried out biofilm, driving filling tube with wind energy rotates, in the contact process of current and filler, the rate of mass transfer of organism and dissolved oxygen is greatly enhanced, and makes microbial film realize successful biofilm at short notice.
In the entire treatment flow process, dissolved oxygen exists with certain gradient profile, and in the water inlet packing area, along with the carrying out of biochemical reaction, dissolved oxygen concentration is reduced to a certain degree, helps the biomembranous denitrogenation of filler internal layer; Enter the brush aeration district, dissolved oxygen returns to higher level, and the microorganism of packing area is improved the removal ability of COD in the competent environment of dissolved oxygen, and dissolved oxygen is with the decline of the reaction property advanced; Enter one section brush aeration-filler combination and handle, whole flow process provides the microbial film condition of various dissolved oxygen conditions and different fillers, makes microorganism degradation of contaminant under suitable separately dissolved oxygen concentration and microbial film thickness condition.
Beneficial effect of the present invention: a kind of corridor-type multi-area domestic sewage advanced treatment system and treatment process are provided, with wind energy as motivating force (being specially adapted to the powerful area of wind field), drive the reactor motion of whole process flow, fundamentally solved the problem of energy consumption; Carry out aeration to change brush, realize aeration and reaction separate treatment, help improving aeration rate and avoid the interference of aeration the microorganism life condition; Can be implemented on the basis of effective removal ammonia nitrogen COD is handled, reach the good result of advanced treatment; Filler rotates biofilm and absorb polluted matter, helps increasing microbial film and organic contact area, has improved the rate of mass transfer of organism and dissolved oxygen simultaneously, makes microorganism obtain better life condition, guarantees stable treated efficient; Take multi-stage type technology, form certain dissolved oxygen gradient, help creating suitable separately dissolved oxygen environment for microorganism; This biologically-intensifying device can be handled at the pollution situation of sanitary sewage and Sewage Plant tail water, this system is convenient to install, moves and the arbitrary combination of different function units, filler is convenient to adjust and change, and has characteristics such as energy-saving and environmental protection, acquisition cost is low, running cost is low simultaneously.
Description of drawings
Fig. 1 is an advanced treatment system structural representation provided by the invention; Fig. 2 is the brush aeration synoptic diagram of advanced treatment system provided by the invention; Fig. 3 is the immersion filler rotating cylinder synoptic diagram of advanced treatment system provided by the invention.
Embodiment
The present invention will be further described: domestic sewage advanced treatment system provided by the invention and method below in conjunction with specific embodiment and accompanying drawing, combine with packing area and brush aeration district, drive brush aeration and the rotation of immersion filling tube with wind energy, be followed successively by on the layout: one-level packing area 1, one section brush aeration district 2, secondary packing area 3, two sections brush aeration districts 4, three grades of packing areas 5.The treatment stage of entering after biofilm is carried out in the packing area, utilization multistage aeration-filler is in conjunction with the purpose that reaches advanced treatment.
The filler of one-level packing area is a Ball-type packing, does not carry out aeration and handles, and filler is inside and outside two-layer after the biofilm, and internal layer is anaerobic environment, and skin is an aerobic environment, and diversified biofilm microorganisms population helps realizing the simultaneous denitrification of sewage.
The brush aeration district changes brush and is rotated by the driving of windmill fin, has replaced traditional electric motor driving, and this windmill is applicable to the area that wind energy resources is abundant, can make full use of the natural resources, and has the technical characterstic of less energy-consumption.
Secondary adopts different elastic fillers with three grades of packing areas, because the difference of packing property helps enriching microbe species in the microbial film, multiple pollutent is played good removal effect.
Shown in accompanying drawing 1,2,3, entry at first enters the one-level packing area 1 that Ball-type packing is housed, and Ball-type packing is after successful biofilm, because its spheric skeleton structure, microbial film are divided inside and outside two-layer, internal layer is anaerobic environment, when microbial film contacts with pollutent, can realize the effect of simultaneous denitrification; After certain biochemical reaction is carried out in one-level packing area 1, sewage enters one section brush aeration district 2, changeing brush rotates under the driving of windmill 6, current are stirred aeration, water is under the effect of rotating commentaries on classics brush blade, tangentially be the water-drop sputtering shape dish out the water surface with entrain into the air intense mixing, finish airborne oxygen and in water, shift; Sewage through aeration enters secondary packing area 3, and immersion filling tube 8 is adopted in this packing area, with screen cloth 9 filler is enclosed in the sizing vat, and under the drive of wind-force, filling tube is rotated biofilm and pollutent is removed in absorption; This segment process is taked aeration zone and biochemical reaction zone separating treatment, can avoid the inhomogeneous influence to microorganism in the microbial film of aeration, for microbial film provides metastable living environment; Sewage carries out aeration again in two sections brush aeration districts 4, so that dissolved oxygen returns to certain level, enters three grades of packing areas 5, and the filler that is different from the I and II packing area is adopted in this zone, helps enriching microbe species, improves pollutant removal; Establish reflux 7 at two, three grades of fillers, sewage is refluxed, supplementary carbon source carries out circular treatment to sewage on the other hand on the one hand, reaches the advanced treatment effect.
Processing set-up is carried out in this method packing area and aeration zone combination, multistage packing area adopts different elastic fillers to carry out biochemical treatment simultaneously, this process characteristic helps forming the dissolved oxygen gradient along the technical process direction, the dissolved oxygen situation of different steps provides suitable living environment for various microorganisms, being used in combination of multiple filler helps multiple microorganism coexistence in the microbial film simultaneously, realizes all contaminations is removed maximization.
Embodiment 1 directly sets up the corridor-type multi-area advanced treatment system at the biological treatment stage based on the sewage work that handles sanitary sewage, and its basic structure and treatment process are same as above.Diameter 180mm fibrous nodules filler is adopted in the one-level packing area, and specific surface area 0.82m is adopted in the secondary packing area 2/ m 3The garland filler, the cascade ring fillers are adopted in three grades of packing areas, the steps include: that sanitary sewage entry that (1) will handle with this factory carries out biofilm and handle, through 1~2 month biofilm successfully; (2) sewage work's sanitary wastewater directly enters the removal that advanced treatment process carries out pollutent behind the basic pretreatment unit of process Sewage Plant; (3) enter the aeration zone after sewage is handled through the one-level packing area and carry out aeration, dissolved oxygen is returned to a certain degree; (4) enter the secondary packing area through the sewage of aeration and handle, enter the aeration zone afterwards and carry out aeration again; (5) sewage going out under the water concentration situation up to standard to carry out reuse, refluxes for water outlet not up to standard after handle three grades of packing areas, and circular treatment is until up to standard.This method energy consumption is low, and treatment effect is good, and COD reduces 60%-70%, and ammonia nitrogen reduces 40%~45%.
Embodiment 2 sets up the corridor-type multi-area advanced treatment system in sewage treatment plant tail water area not up to standard, and its basic structure and treatment process are same as above.50mm multiaspect hollow ball filler is adopted in the one-level packing area, and specific surface area 0.89m is adopted in the secondary packing area 2/ m 3The garland filler, specific surface area 114m is adopted in three grades of packing areas 2/ m 3The polypropylene filler the steps include: that (1) carry out biofilm with certain density sanitary wastewater to the packing area, guarantees the normal demand of microorganism to carbon source and nitrogenous source; (2) treat biofilm success after, constant gradient reduces concentration of wastewater, and microbial film is tamed processing; (3) treat that biological film thickness is stable after, sewage treatment plant tail water is inserted this advanced treatment process, pollutent is removed; (4) enter the aeration zone after sewage is handled through the one-level packing area and carry out aeration, dissolved oxygen is returned to a certain degree; (5) enter the secondary packing area through the sewage of aeration and handle, enter the aeration zone afterwards and carry out aeration again; (6) sewage going out under the water concentration situation up to standard to carry out reuse, refluxes for water outlet not up to standard after handle three grades of packing areas, and circular treatment is until up to standard, and simultaneously to the insufficient link supplementary carbon source of carbon source, the assurance biochemical reaction is stable to carry out.This technical process has advanced treatment effect preferably, and COD reduces 40%~50%, and ammonia nitrogen reduces 30%~40%.

Claims (7)

1. a corridor-type multi-area domestic sewage advanced treatment system comprises packing area and aeration zone, it is characterized in that the water inlet place establishes one-level packing area (1), connects aeration zone (2), secondary packing area (3), aeration zone (4) and three grades of packing areas (5) thereafter successively.
2. domestic sewage advanced treatment system according to claim 1 is characterized in that the packing area is an immersion filler rotating cylinder.
3. domestic sewage advanced treatment system according to claim 2 is characterized in that one-level packing area (1) filler is a Ball-type packing.
4. domestic sewage advanced treatment system according to claim 3 is characterized in that aeration zone (2) is the brush aeration district.
5. according to each described domestic sewage advanced treatment system in the claim 1~4, it is characterized in that secondary packing area (3) filler is that polyethylene is rigid filled.
6. according to each described domestic sewage advanced treatment system in the claim 1~4, it is characterized in that three grades of packing areas (5) filler is an elastic solid filler.
7. a corridor-type multi-area domestic sewage deep treatment method the steps include:
(a) sanitary sewage enters one-level packing area (1) by water inlet, and sanitary sewage carries out biofilm to filler, and two-layer inside and outside dividing after the biofilm, internal layer is anaerobic environment, realizes simultaneous denitrification;
(b) current import aeration zone (2) by one-level packing area (1), change brush and rotate by awe (6) driving, make the dissolved oxygen in the water return to metastable state;
(c) sewage through aeration enters secondary packing area (3), drives the packing area rotation by wind-force, realizes the absorption of biofilm and pollutent;
(d) brush aeration district (4) is passed through in the water outlet of secondary packing area once more, and sewage is carried out aeration again;
(e) sewage through aeration enters three grades of packing areas (5), and this district's filler is an elastic solid filler, and sewage is discharged after treatment.
CN2010102548116A 2010-08-16 2010-08-16 Corridor-type multi-area domestic sewage advanced treatment system and treatment method Pending CN101913736A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674536A (en) * 2011-03-17 2012-09-19 尹军 Method for suspending combined filler intermittently
CN103112999A (en) * 2013-02-25 2013-05-22 北京工业大学 Regeneration method for urban sewage by continuous flow

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2144517C1 (en) * 1999-05-05 2000-01-20 Камайданов Евгений Николаевич Method and plant for treatment of sewage
CN1569689A (en) * 2004-04-30 2005-01-26 重庆大学 Lateral flow aeration biological filtering-tank reactor
CN201313853Y (en) * 2008-11-10 2009-09-23 重庆大学 Biofilm reaction equipment for wastewater treatment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2144517C1 (en) * 1999-05-05 2000-01-20 Камайданов Евгений Николаевич Method and plant for treatment of sewage
CN1569689A (en) * 2004-04-30 2005-01-26 重庆大学 Lateral flow aeration biological filtering-tank reactor
CN201313853Y (en) * 2008-11-10 2009-09-23 重庆大学 Biofilm reaction equipment for wastewater treatment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674536A (en) * 2011-03-17 2012-09-19 尹军 Method for suspending combined filler intermittently
CN103112999A (en) * 2013-02-25 2013-05-22 北京工业大学 Regeneration method for urban sewage by continuous flow

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