CN102603116B - Distribution treatment combination technological method for domestic sewage of small-sized towns - Google Patents
Distribution treatment combination technological method for domestic sewage of small-sized towns Download PDFInfo
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Abstract
The invention discloses a distribution treatment combination technological method for domestic sewage of small-sized towns. The distribution treatment combination technological method includes steps: S1, water collection regulation treatment: leading the sewage to enter a water collecting and regulating tank and lifting the sewage by a submersible pump after solid residues in the sewage is removed by a porous grating pipe; S2: integral biological treatment: sequentially carrying out a primary sedimentation process, an anoxia process, a rotary biological treatment process and a secondary sedimentation process; S3, treatment by the aid of an artificial wetland: feeding the sewage to the subsurface artificial wetland; and S4, disinfection. In the primary sedimentation process, parts of suspended matters and inorganic particulate matters are absorbed and settled, and simultaneously, parts of organic matters are removed; a denitrification process is complete din the anoxia process; organic matters which are not removed are degraded in the rotary biological treatment process; and in the secondary sedimentation process, suspended matters in the sewage are settled, and the sewage is clarified. The combination technological method has the advantages of fine denitrification effect, low excess sludge quantity, high standards of treated yielded water, low energy consumption and running cost and simplicity in management and maintenance, and is suitable for popularization and application in the small-sized towns.
Description
Technical field
The invention belongs to the sewage treatment technology field, relate in particular to a kind of domestic sewage of villages and small towns dispersion treatment that is applicable to, made up that integral biological is handled and the small-scale sewage treatment process method of artificial swamp.
Background technology
Small-sized villages and small towns are remote relatively, relatively disperse, backward in economy, seldom sewage centralized collection facility is arranged, sanitary sewage is arbitrarily discharging usually, water body and ecotope near the severe contamination, and it is increasingly serious to pollute situation.Along with the further quickening of China's new countryside construction progress, the processing of small-sized domestic sewage of villages and small towns will more and more be subject to people's attention.The decentralized treatment technology has that one-time investment is little, running cost is low, treatment effect is good, the management maintenance characteristic of simple, thereby by extensive concern and application.
At present, the main technique of the small-sized domestic sewage of villages and small towns treatment facility employing of China has BAF, integrated film bio-reactor, sbr reactor device, manpower rapid-infiltration, biological contact oxidation process, stabilization pond, artificial swamp etc.Effluent quality standard after these traditional decentralized wastewater treatment technologies are handled generally only reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard, therefore, require higher area, major river valley at effluent quality, above-mentioned Technology can not meet the demands, must consider follow-up further advanced treatment for the standard of increasing water quality.
The patent document of the patent No. 200510031468.8 discloses a kind of sewage disposal combination type wetland system and sewage treatment process thereof.Its sewage treatment process is: " sewage at first enters biological regulating reservoir; through precipitation; bio-absorbable with transform after enter aerobic degradation with aerated reaction is carried out in the microorganism culturing pond; the medium by artificial current wetland adsorbs and plant absorbing again; enter artificial surface-flow at last; in aquatic animals and plants utilization and natural sedimentation process, sewage is cleaned." subject matter that exists of this technology is: because nitrogen element content is higher in the sanitary sewage; and be rich in organism; the effect that this technology is denitrogenated and reduce the organic content DeGrain; eutrophication can often appear in the artificial swamp unit; the effluent quality instability, can't satisfy the geographic sewage disposal demand in major river valley that effluent quality is had relatively high expectations.
Summary of the invention
The object of the present invention is to provide a kind of small-sized domestic sewage of villages and small towns dispersion treatment combined technical method; Make the treatment effect of small-sized domestic sewage of villages and small towns better, effluent quality reaches higher standard, and less energy-consumption, low cost, is convenient to administer and maintain.Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of small-sized domestic sewage of villages and small towns dispersion treatment combined technical method of the present invention may further comprise the steps:
Step S1, the adjusting of catchmenting are handled: sewage is collected through sewage network and is entered the equalizing tank that catchments, and adopts the apertured grills pipe to block except that behind the solid residue wherein, promotes via submersible pump again; Described submersible pump is positioned in the described apertured grills pipe;
Step S2, integral biological are handled: treating processes comprises primary deposition process, anoxic process, rotating biological treating processes and secondary sedimentation process successively; The described primary deposition process of sewage process by submersible pump described in the step S1 is lifted out makes part suspended substance and inorganic particulate matter adsorption and sedimentation, removes a part of organism simultaneously; Finish the denitrogenation operation through described anoxic process then, make the organic matter degradation of not removing through described rotating biological treating processes again, the described secondary sedimentation process of process makes suspended substance precipitation, the clarification in the sewage at last; The part of the mud that described secondary sedimentation process produces is back to described anoxic process;
Step S3, artificial swamp are handled: the sewage gravity flow after will handling through described integral biological is sent into for the streaming artificial swamp, carries out advanced treatment.
Step S4, disinfect: the water outlet water leg will be sent in the sewage gravity flow after will handling through described artificial swamp, and the mode that adopts the sterilization medicine-chest to add chlorine tablets carries out disinfection water outlet discharging or reuse after the sterilization.
Above-mentioned purpose of the present invention can also be further perfect by the following technical programs:
Described primary deposition process among the step S2 is carried out in preliminary sedimentation tank; Described preliminary sedimentation tank adopts the fibrous bundle filler; Described fibrous bundle filler is made up of filler unit and axial cord, and described filler unit is made up of wheel shape plastics disk and fibrous bundle, and a plurality of described filler units are through on the described axial cord by certain spacing, and are fixed in the described preliminary sedimentation tank.
The voidage of described fibrous bundle filler is 98%, and filtering velocity is per hour 35 meters.
The process of anoxic described in the step S2 is carried out in anoxic pond; Described denitrogenation operation is: the returned sluge that produces in nitrification liquid that produces in sewage after the described primary deposition process of process and the described rotating biological treating processes and the described secondary sedimentation process, in described anoxic pond, mix, carry out anti-nitration reaction, the nitric nitrogen in the sewage is converted into nitrogen.
Described anoxic pond and described preliminary sedimentation tank bottom separate.
Described rotating biological treating processes among the step S2 adopts the two stage biological reactor; Described two stage biological reactor is made up of a biological rotor and a biochemical groove, and the inside of described biological rotor comprises the multi-stage biological impeller, and each described biological impeller is provided with a plurality of spiral helicine biological blades;
Certainly flow to described rotating biological processing unit from the sewage that comes out of described anoxic pond, under the driving of transmission mechanism, described biological rotor rotates synchronously, and air enters by the air water hole of described biological rotor end-face, mixes with the sewage that comes out from described anoxic pond; Contact and mass transfer through three of oxygen, sewage, microorganism, make the degraded of the organic pollutant in the sewage; Simultaneously, described biological blade is washed away by sewage, makes its aged biofilm detachment, forms new microbial film; Part through the sewage after the described bioreactor for treatment is promoted in the described anoxic pond as nitrification liquid by described biological rotor.
The process of secondary sedimentation described in the step S2 is carried out in second pond, and described second pond is an inclined-plate clarifying basin; Sewage precipitates in described inclined-plate clarifying basin, clarifies through after the described rotating biological treating processes.
Another part mud that produces in mud that produces in the described primary deposition process and the described secondary sedimentation process is regularly removed by taking out dung-cart.
Added filler in the streaming artificial swamp described in the step S3, and kind is implanted with the waterplant with purification function;
The significant depth of described filler is more than or equal to 1 meter, and it comprises gravel, Wingdale and zeolite; Described waterplant comprises Canna generalis Bailey, reed, Medulla Junci, fairy bamboo.
The invention has the beneficial effects as follows: 1, the small-sized domestic sewage of villages and small towns dispersion treatment of the present invention combined technical method, adopt the decentralized treatment technology, have that one-time investment is little, running cost is low, treatment effect is good, the management maintenance characteristic of simple; 2, adopt the artificial swamp technology as advanced treatment, realized the higher standard of treat effluent water quality, the while is with low cost, management is simple; 3, anoxic process in the technology and rotating biological treating processes combine, play effective denitrogenation dephosphorizing, removed organic effect, reduced carbon emission, avoided causing the artificial swamp eutrophication, guarantee stable water flow quality, reduced surplus sludge volume simultaneously; 4, the sewage after will handling as in water be back to greening or field irrigation, realized the regeneration of water resources; 5, can effectively solve the problem of Rural areas domestic sewage treatment, have unusual effect improving Rural Water Environment.
Description of drawings
Fig. 1 is the schema of small-sized domestic sewage of villages and small towns dispersion treatment combined technical method of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, small-sized domestic sewage of villages and small towns dispersion treatment combined technical method of the present invention is further elaborated below in conjunction with drawings and Examples; Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, the specific embodiment for small-sized domestic sewage of villages and small towns dispersion treatment combined technical method of the present invention may further comprise the steps:
Step S1, the adjusting of catchmenting are handled: sanitary sewage at first enters the equalizing tank that catchments through the sewage network collection and carries out pre-treatment, adopts the apertured grills pipe to block except that solid residue in the sewage, is promoted to the subsequent disposal unit through submersible pump then; Submersible pump is placed in the apertured grills pipe, and is fixedly installed at the bottom of the equalizing tank that catchments; The residence time of sewage in the equalizing tank that catchments is 6 hours;
Step S2, integral biological are handled: treating processes comprises primary deposition process, anoxic process, rotating biological treating processes and secondary sedimentation process successively; The sanitary sewage after the debris retaining of apertured grills pipe among the described S1 is at first passed through the primary deposition process, part suspended substance and inorganic particulate matter adsorption and sedimentation are got off, remove a part of organism simultaneously; Finish the denitrogenation operation through described anoxic process then, make in the primary deposition process organic matter degradation of not removing through described rotating biological treating processes again, at last through described secondary sedimentation process make in the sewage suspended substance precipitation, clarification after enter the subsequent disposal unit; The part of the mud that described secondary sedimentation process produces is back to described anoxic process;
Step S3, artificial swamp: the sewage gravity flow after the described integral biological processing is sent into for the streaming artificial swamp, and the further advanced treatment through artificial swamp enters the subsequent disposal unit after water outlet is up to standard.
Step S4, disinfect: the water outlet water leg is sent in the sewage gravity flow after described artificial swamp is handled, and the easy means that adopts the sterilization medicine-chest to add chlorine tablets then carries out disinfection, and water body is directly discharged in the water outlet after the sterilization nearby, or is back to peripheral green area irrigation.
Preferably, the primary deposition process among the present embodiment step S2 is carried out in preliminary sedimentation tank; Described preliminary sedimentation tank adopts the fibrous bundle filler; Average hydraulic detention time 0.5h, design discharge 2.0m
3/ h; Under action of gravity, utilize to filter and absorption principle, most suspended substances and inorganic particulate matter adsorption and sedimentation are got off, also can remove a part of organism simultaneously;
Further, the fibrous bundle filler in the present embodiment is made up of filler unit and axial cord, and each filler unit is made up of wheel shape plastics disk and fibrous bundle, and a plurality of filler units are through on the axial cord at a certain distance, and are fixed in the preliminary sedimentation tank; The voidage of described fibrous bundle filler is 98%, and filtering velocity is 35m/h; Utilize the water level gravity from top to bottom in the preliminary sedimentation tank to make the filtering layer compression, the fibrous bundle filler is in dense state, has improved the usefulness of filtering layer impurity trapped, the water quality after having guaranteed to filter.
Preferably, the anoxic process among the present embodiment step S2 is carried out in anoxic pond;
Described denitrogenation operation is: the returned sluge that produces in nitrification liquid that produces in sewage after the described primary deposition process of process and the described rotating biological treating processes and the described secondary sedimentation process, in described anoxic pond, mix, carry out anti-nitration reaction, the nitric nitrogen in the sewage is converted into nitrogen; From water, overflow, finally reach the purpose of denitrogenation; The average hydraulic detention time of anoxic pond is 2.5h, and design discharge is 2.0m
3/ h;
The bottom of described anoxic pond and the bottom of described preliminary sedimentation tank separate, and avoid the stirring of anoxic pond mixed solution, influence the sedimentation effect of preliminary sedimentation tank;
Preferably, the rotating biological treating processes among the present embodiment step S2 adopts the two stage biological reactor; Described two stage biological reactor is made up of a biological rotor and a biochemical groove, and the inside of described biological rotor comprises the multi-stage biological impeller, and each described biological impeller is provided with a plurality of spiral helicine biological blades;
Further, certainly flow in the described bio-reactor from the sewage that comes out of described anoxic pond, under the driving of transmission mechanism, described biological rotor rotates synchronously, air enters by the air water hole of described biological rotor end-face, mixes with the sewage that comes out from described anoxic pond; Contact and mass transfer through three of oxygen, sewage, microorganism, make the degraded of the organic pollutant in the sewage; Simultaneously, described biological blade is washed away by sewage, makes its aged biofilm detachment, forms new microbial film, carries out the metabolic processes of microorganism; Part through the sewage after the described bioreactor for treatment is promoted in the described anoxic pond as nitrification liquid by described biological rotor.Described bio-reactor has adopted unique composite bio-chemical technology, can be under the less energy-consumption condition efficient degradation pollutent; Sewage is 3.5h at the hydraulic detention time of rotating biological treating processes, and design discharge is 2.0m
3/ h.
Preferably, the secondary sedimentation process is carried out in second pond described in the present embodiment step S2; Described second pond is an inclined-plate clarifying basin; Sewage precipitates in described inclined-plate clarifying basin, clarifies through after the described rotating biological treating processes; The average hydraulic detention time of secondary sedimentation process is 0.6h, and design discharge is 2.0m
3/ h.Under action of gravity, utilize the shallow layer settling principle, with the precipitation of the suspended substance in the sewage, enter the subsequent disposal unit after the clarification; Its sedimentary mud part enters anoxic pond by sludge reflux pump, participates in anti-nitration reaction;
Further, another part mud that mud that described primary deposition process produces and described secondary sedimentation process produce is regularly removed, is transported outward by taking out dung-cart.
Preferably, added filler in the described underflow type artificial wet land among the present embodiment step S3, and kind is implanted with the waterplant with purification function;
Described filler comprises gravel, Wingdale and the zeolite of different gradation; Described waterplant comprises Canna generalis Bailey, reed, Medulla Junci, fairy bamboo; The material bed significant depth of filler is more than or equal to 1.0m, and hydraulic surface loading is 0.2m
3/ m
2D; Hydraulic detention time is 1.6 days; Water outlet leading indicator after artificial swamp is handled reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard.
The experimental data of the sanitary sewage that the small-sized domestic sewage of villages and small towns dispersion treatment combined technical method in the employing present embodiment is handled is as follows:
Small-sized domestic sewage of villages and small towns dispersion treatment combined technical method in the present embodiment, adopt the decentralized treatment technology, anoxic process and rotating biological treating processes in the technology combine, play effective denitrogenation dephosphorizing, removed organic effect, reduced carbon emission, avoid causing the artificial swamp eutrophication, guaranteed stable water flow quality, reduced surplus sludge volume simultaneously; And adopt the artificial swamp technology as advanced treatment, and realized the higher standard of treat effluent water quality, the while is with low cost, management is simple; Water is back to greening or field irrigation in direct discharging in sewage process sterilization back after treatment or the conduct, has realized the regeneration of water resources; Has unusual effect to improving Rural Water Environment.
The above only is the preferred embodiments of the present invention; be not limited to the present invention; for a person skilled in the art; the present invention can have various changes and variation; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improve, all should be included in protection scope of the present invention.
Claims (8)
1. a small-sized domestic sewage of villages and small towns dispersion treatment combined technical method is characterized in that, may further comprise the steps:
Step S1, the adjusting of catchmenting are handled: sewage is collected through sewage network and is entered the equalizing tank that catchments, and adopts the apertured grills pipe to block except that behind the solid residue wherein, promotes via submersible pump again; Described submersible pump is positioned in the described apertured grills pipe;
Step S2, integral biological are handled: treating processes comprises primary deposition process, anoxic process, rotating biological treating processes and secondary sedimentation process successively; The described primary deposition process of sewage process by submersible pump described in the step S1 is lifted out makes part suspended substance and inorganic particulate matter adsorption and sedimentation, removes a part of organism simultaneously; Finish the denitrogenation operation through described anoxic process then, make the organic matter degradation of not removing through described rotating biological treating processes again, the described secondary sedimentation process of process makes suspended substance precipitation, the clarification in the sewage at last; The part of the mud that described secondary sedimentation process produces is back to described anoxic process;
Described rotating biological treating processes among the step S2 adopts the two stage biological reactor; Described two stage biological reactor is made up of a biological rotor and a biochemical groove, and the inside of described biological rotor comprises the multi-stage biological impeller, and each described biological impeller is provided with a plurality of spiral helicine biological blades;
The process of anoxic described in the step S2 is carried out in anoxic pond;
From flowing to described two stage biological reactor, under the driving of transmission mechanism, described biological rotor rotates synchronously from the sewage that comes out of described anoxic pond, and air enters by the air water hole of described biological rotor end-face, mixes with the sewage that comes out from described anoxic pond; Contact and mass transfer through three of oxygen, sewage, microorganism, make the degraded of the organic pollutant in the sewage; Simultaneously, described biological blade is washed away by sewage, makes its aged biofilm detachment, forms new microbial film; Part through the sewage after the described bioreactor for treatment is promoted in the described anoxic pond as nitrification liquid by described biological rotor;
Step S3, artificial swamp are handled: underflow type artificial wet land is sent in the sewage gravity flow after will handling through described integral biological, carries out advanced treatment;
Step S4, disinfect: the water outlet water leg will be sent in the sewage gravity flow after will handling through described artificial swamp, and the mode that adopts the sterilization medicine-chest to add chlorine tablets carries out disinfection water outlet discharging or reuse after the sterilization.
2. combined technical method according to claim 1 is characterized in that:
Described primary deposition process among the step S2 is carried out in preliminary sedimentation tank; Described preliminary sedimentation tank adopts the fibrous bundle filler; Described fibrous bundle filler is made up of filler unit and axial cord, and described filler unit is made up of wheel shape plastics disk and fibrous bundle, and a plurality of described filler units are through on the described axial cord by certain spacing, and are fixed in the described preliminary sedimentation tank.
3. combined technical method according to claim 2 is characterized in that:
The voidage of described fibrous bundle filler is 98%, and filtering velocity is per hour 35 meters.
4. combined technical method according to claim 1 and 2 is characterized in that:
Described denitrogenation operation is: the returned sluge that produces in nitrification liquid that produces in sewage after the described primary deposition process of process and the described rotating biological treating processes and the described secondary sedimentation process, in described anoxic pond, mix, carry out anti-nitration reaction, the nitric nitrogen in the sewage is converted into nitrogen.
5. combined technical method according to claim 4 is characterized in that:
Described anoxic pond and described preliminary sedimentation tank bottom separate.
6. combined technical method according to claim 1 is characterized in that:
The process of secondary sedimentation described in the step S2 is carried out in second pond, and described second pond is an inclined-plate clarifying basin; Sewage precipitates in described inclined-plate clarifying basin, clarifies through after the described rotating biological treating processes.
7. according to claim 1 or 6 described combined technical methods, it is characterized in that:
Another part mud that produces in mud that produces in the described primary deposition process and the described secondary sedimentation process is regularly removed by taking out dung-cart.
8. combined technical method according to claim 1 is characterized in that:
Added filler described in the step S3 in the underflow type artificial wet land, and kind is implanted with the waterplant with purification function;
The significant depth of described filler is more than or equal to 1 meter, and it comprises gravel, Wingdale and zeolite; Described waterplant comprises Canna generalis Bailey, reed, Medulla Junci, fairy bamboo.
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| CN103233598B (en) * | 2013-05-07 | 2015-05-20 | 江苏科威环保技术有限公司 | Life integration environmentally-friendly facility for field operation |
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| CN107739132A (en) * | 2017-11-15 | 2018-02-27 | 北京泰昌科睿环保科技有限公司 | A kind of sanitary sewage self-circulation type integrated treatment unit |
| CN110498576A (en) * | 2019-09-23 | 2019-11-26 | 苏州首创嘉净环保科技股份有限公司 | A kind of efficient low-consume domestic sewage of villages and small towns treatment process |
| CN111196669A (en) * | 2020-03-25 | 2020-05-26 | 重庆科技学院 | Sewage treatment and nitrogen and phosphorus resource utilization system |
| CN111825272A (en) * | 2020-05-25 | 2020-10-27 | 安徽普偌森环保科技有限公司 | Microbial degradation treatment process for rural domestic sewage |
| CN111875177A (en) * | 2020-08-05 | 2020-11-03 | 山东省农业可持续发展研究所 | Agricultural sewage treatment device with good treatment effect and combined artificial wetland |
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