CN1132789C - City sewage treatment technology - Google Patents
City sewage treatment technology Download PDFInfo
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- CN1132789C CN1132789C CN 00112079 CN00112079A CN1132789C CN 1132789 C CN1132789 C CN 1132789C CN 00112079 CN00112079 CN 00112079 CN 00112079 A CN00112079 A CN 00112079A CN 1132789 C CN1132789 C CN 1132789C
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- anaerobic filter
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- sewage
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Abstract
The present invention relates to a treating technique of municipal sewage, which integrates aerobic treatment and anaerobic treatment. The present invention adopts the multi-stage cycle operation of upward flowing type anaerobic filters and downward flowing type anaerobic filters; with the combination of the methods of biological contact oxidation, sedimentation and sterilization, most of organic matters in the sewage are decomposed by the anaerobic decomposition of a multi-stage cycle section. The present invention has low power consumption, the running cost of the present invention is only about one third of the running cost of a traditional sewage treatment process, and land occupation is saved; the equipment investment of the present invention is small and is reduced for about one third than that of a traditional sewage treatment system; the integral equipment of the present invention adopts PLC program control, so the present invention has few control points, and the management is simple and convenient in the running of the equipment.
Description
Technical field
The present invention involves in the municipal sewage treatment technology, specifically a kind of anaerobism, aerobic method for the treatment of city waste water of integrating.
Technical background
Traditional urban sewage treatment process is with biological contact oxidation process, activated sludge process is in the majority, though the former decomposing organic matter is respond well, but power consumption is big, relevant auxiliary facilities is many, though latter's power consumption is little, but the resolving time is long even decompose incomplete, influence whole structure, therefore the collection anaerobism has appearred, aerobic in the sewage treatment technique of one, as notification number is that the application of CN1175556A discloses a kind of " facilities for treating waste water on large scale ", its technical process precipitates the 1st and the 2nd precipitation of decomposing with anaerobism, decomposition chamber (1 with reference to figure 1 with sand and the inclusion that contains in the object being treated, 2); The contact aeration chamber (3) that utilizes the continuous air of supplying with to remove organic substance; Make the microbial floc of generation and the final settling chamber (4) for the treatment of water solid-liquid separation; To be transported to the 1st precipitation, the mud Handling device of decomposition chamber and contact aeration chamber at the mud of the bottom settlings of final settling chamber; Will be not precipitation and directly effusive fine throw out carry out the filtration of secondary treatment, decomposition chamber (5) with filtering material; Remove the sand filter bed of sterilization bacterium behind the suspended solid fully, activated-charcoal filter bed and disinfection trough (6), this technology has the very good efficient of removing to organic substance, but because this technology is based on aerobic, advance sewage before the contact aeration chamber through the second-level settling pond removal of impurities, the centre is carried out anaerobic digestion simultaneously, but not based on anaerobic digestion, while is with the different flow and the concentration of equalization different time sewage, thereby reduce the impact load of aerator tank, that is to say, two procedures before the contact aeration mainly play precipitation and regulating effect, the organism overwhelming majority in the sewage still need rely on catalytic oxidation to decompose, the working load of contact aeration chamber does not still have and alleviates, power consumption is bigger, corresponding moving row expense height, aeration time is also long, and that oversize aeration time can make throw out between microorganism form is bad, is difficult for forming precipitation but directly flows out with fine throw out, in order to guarantee effluent characteristics, this technology is provided with filtration again behind settling tank, decomposition chamber (5), it is built-in with a plurality of filtrations, decomposes plate, remove undecomposed organic substance and fine throw out in the treating water to reach, thereby make whole processing unit many, investment is big, and corresponding floor space is also many.
Summary of the invention
The present invention is just in order to overcome above-mentioned deficiency, a kind of less investment is provided, take up an area of economize, working cost is low, the processing cycle short, the method for the treatment of city waste water of convenient management and low power.
Innovation part of the present invention is integrating on anaerobism, the aerobic basis, in process, strengthen anaerobic treatment, alleviate aerobic treatment, promptly before bio-contact oxidation, take multistage anaerobism circulation to decompose most organic substance, to difficult decompose or the undecomposed organism of small part, handle by bio-contact oxidation again.Specifically, a kind of method for the treatment of city waste water, flow process is that sewage enters anaerobic filter again through the biological contact oxidation pond decomposing organic matter after grille well is held back the coarse grain foreign material, aged microbial film and inorganics are removed through settling tank, the mud of settling tank bottom is carried through gas and is moved to sludge digestion tank, it is characterized in that anaerobic filter adopts the multistage ball mode of following, multistage round-robin anaerobic filter leading portion is designed to the anoxic section, and back segment is designed to the anaerobism section.The leading portion of anaerobic filter-anoxic section, dissolved oxygen≤0.5mg/L, back segment-anaerobism section, dissolved oxygen≤0.1mg/L, the setting of anoxic section is exceeded to be no more than 1/3 of full cycle.The anoxic section mainly is to utilize the oxygen bacterium of holding concurrently that organic sewage is hydrolyzed and acidifying, and the oxygen bacterium of holding concurrently is attached on the filling carrier in the filter tank, and the lytic enzyme that it discharges in sewage has quickened reaction process, partly does catalysis for follow-up anaerobism simultaneously and prepares; The anaerobism section utilizes anerobe to decompose the organism of sewage, anerobe is evenly distributed on filling surface, sewage through and packing layer is evenly passed through in the water hole, organism is by the adsorbed decomposition of the anerobe on the filling surface, through reciprocation cycle, the most of organism in the sewage is progressively degraded, and has alleviated the load of postorder oxidation scrubbing, just reduce the power consumption of aerobic section, thereby greatly reduced moving row expense.
Municipal effluent at first passes through grille well, holds back the floating matter in coarse grain foreign material and the water.Be made up of coarse rack, fine fack before and after the described grille well, sewage is at first further removed thin slightly suspended solid through fine fack again after coarse rack is removed the foreign material of large volume; Sewage behind grid enters the multistage circulation that is crisscross arranged by upflow type anaerobic filter tank, downflow system anaerobic filter, the packing layer that is provided with in the anaerobic filter is greater than 3 meters and all be equipped with water-distributing device and captation, avoid the stopping generation of phenomenon, can improve wastewater treatment efficiency greatly, multistage circulation is the most of organism in the degradation of sewage progressively.Described multistage circulation can be begun by the upflow type anaerobic filter tank, also can begin by the downflow system anaerobic filter, with the initial the best of upflowing anaerobic filter, because the active sludge of bottom, the easier drive of the current that make progress filter tank, its surperficial bacterium helps organic decomposition, multistage circulation also can be arbitrarily with upflowing, the downflow system anaerobic filter finishes, still end up being good with the upflowing anaerobic filter, because the sewage that goes out after the multistage circulation directly will enter biological contact oxidation pond, its underpart is provided with the qi-emitting hole of continuously feeding air, the effusive sewage of downflow system anaerobic filter directly enters the biological contact oxidation pond bottom, the easier generation crossfire of sewage that comes out than upflow type anaerobic filter tank, bring air into anaerobic pond, influence the scrubbing effect of anaerobic pond.In order to prevent that air from sealing in anaerobic filter, can be provided with water seal at the sewage inlet place of biological contact oxidation pond.The upper and lower filter tank number that is crisscross arranged in the multistage circulation is determined by the treatment capacity of whole facility.
Be provided with the filtrate reflux in multistage circulation, the adjustable throttle amount has been omitted equalizing tank on the one hand, can further improve the scrubbing rate of anaerobism section on the other hand.Reflux is good before the last step anaerobic filter in the multistage circulation to be arranged on, and filtrate is through being pumped to multistage round-robin first step anaerobic filter.
Still some does not degrade and the organism of difficult degradation exists sewage after anaerobic treatment, and it further decomposes with bio-contact oxidation.Bio-contact oxidation has activated sludge process concurrently based on biomembrance process, provides oxygen source by gas blower, and aerobic bacteria is evenly distributed on filling surface, and the residual organism that has is by aerobic bacteria absorption, degraded.
The sewage that comes out from biological contact oxidation pond enters settling tank, removes aged microbial film and inorganics, and the mud that the settling tank bottom accumulates submits into sludge digestion tank through gas, and the clear water on settling tank top then enters sterilization pool and discharges after sterilizing.
Sludge digestion tank top height has the clear liquid reflux, and the supernatant liquor in the pond enters multistage circulation by reflux, normally enters multistage round-robin last step.
The present invention adopts skeleton construction, be arranged at and be full closeding state below the face of land, the waste gas that produces in the sewage treatment process is concentrated high altitude discharge, non-secondary pollution, but Lawn planted, flowers and trees on the face of land, also can build parking lot, road, house, actual floor space seldom, investment cost is also very low simultaneously.
The technology that the present invention sets forth need not the personal management, all adopts the PLC time variable control, and the reference mark seldom, only need control mechanical grille, gas blower and filtrate reflux pump, thereby the position that can produce fault in operational process is few, control corresponding simply, and do not have the refluence phenomenon of sewage.
The sewage degradation treatment cycle of this technology is shorter, generally is designed to 24 hours, and its residence time distributes roughly as table one.
Table one
| The position | The residence time |
| Multistage circulation | 16～17 hours |
| Bio-contact oxidation | 6～7 hours |
| Settling tank | 1.5～2 hours |
| Sterilization discharging pond | 0.5～1 hour |
The present invention collects anaerobism, aerobic in one, take the upflow type anaerobic filter tank, the multistage circular flow of downflow system anaerobic filter, in conjunction with bio-contact oxidation, precipitation, disinfectant method, power consumption is low, it only is about 1/3rd of traditional waste water treatment process, working cost also only accounts for about 1/3rd of traditional waste water treatment process, place under the face of land is that structure whole detested facility sewage place time short (cycle is designed to 24 hours) with Steel Concrete, itself has regulating power, need not to be equipped with equalizing tank, also saved simultaneously the sewage lifting system, not only take up an area of and economize, and facility investment has been few, reduce about about 1/3rd than traditional wastewater treatment system, adopt the PLC time variable control in the entire equipment, the reference mark is few, and management in service is very simple;
Description of drawings
Fig. 1 is the process flow sheet of prior art.
Fig. 2 is a process flow sheet of the present invention.
Embodiment
Further specify the present invention below in conjunction with embodiment.
The design objective of present method sees Table two, schema is with reference to figure 2, sewage is at first by the grid removal of impurities, enter the multistage circulation that the downflow system anaerobic filter begins, this circulation is by downflow system, the upflow type anaerobic filter tank is crisscross arranged, last step in the circulation also is designed to the downflow system anaerobic filter, preceding 1/4th sections of full cycle are designed to the anoxic section, back 3/4ths is designed to the anaerobism section, other is provided with and is subjected to the programme controlled filtrate reflux pump of PLC, this pump is arranged on multistage round-robin last step upflow type anaerobic filter tank section, be back to multistage round-robin initial section, sewage through 16 hours anaerobic treatment enters the good pond of bio-contact oxidation, aerobic decomposition entered settling tank precipitation 1.5 hours after 6 hours, the sterilization in sterilization discharging pond of the clear liquid on settling tank top was discharged after 0.5 hour, and the mud of settling tank bottom is regularly carried by gas and moved to aerobic sludge digestion tank and efflux at last, this top, pond is provided with the clear liquid reflux, and supernatant liquor is back to multistage round-robin last step.Through the sewage that this technology was handled in about 24 hours, up to standard fully during discharging, its result can be referring to table three.
Table two
| Pollution factor | Water inlet (mg/l) | Water outlet (mg/l) |
| BOD 5 | ≤250 | ≤20 |
| COD cr | ≤400 | ≤70 |
| Suspended substance | ≤300 | ≤70 |
| PH | 6——9 | 6——9 |
| Ammonia nitrogen | ≤40 | ≤15 |
Table three
| Device name | Project | COD cr | ?SS | ?BOD 5 | Ammonia nitrogen | Total nitrogen |
| Multistage round-robin filter tank | Influent concentration (mg/l) | 183 | ?83 | ?40.8 | ?12.5 | ?16.9 |
| Go out water concentration (mg/l) | 65 | ?23 | ?16.2 | ?12.2 | ?13.5 | |
| But remove rate (%) | 64.5 | ?72.3 | ?60.3 | ?2.4 | ?20.1 | |
| Biological contact oxidation pond | Influent concentration (mg/l) | 65 | ?23 | ?16.2 | ?12.2 | ?13.5 |
| Go out water concentration (mg/l) | 40 | ?22 | ?6.04 | ?3.97 | ?6.05 | |
| Clearance (%) | 38.5 | ?4.3 | ?62.7 | ?67.5 | ?55.2 | |
| Assembly of devices | Influent concentration (mg/l) | 183 | ?83 | ?40.8 | ?12.5 | ?16.9 |
| Go out water concentration (mg/l) | 40 | ?22 | ?6.04 | ?3.97 | ?6.05 | |
| Clearance (%) | 78.1 | ?73.5 | ?85.2 | ?68.2 | ?64.2 |
Claims (7)
1. method for the treatment of city waste water, flow process is that sewage enters anaerobic filter again through the biological contact oxidation pond decomposing organic matter after grille well is held back the coarse grain foreign material, aged microbial film and inorganics are removed through settling tank, the mud of settling tank bottom is carried through gas and is moved to sludge digestion tank, it is characterized in that anaerobic filter adopts multistage Recycle design, multistage round-robin anaerobic filter leading portion is designed to the anoxic section, and back segment is designed to the anaerobism section.
2. method according to claim 1 is characterized in that the anoxic section is no more than 1/3 of anaerobic filter full cycle.
3. method according to claim 1 and 2, what it is characterized in that the multistage circulation of anaerobic filter adopts is upflow type anaerobic filter tank and the downflow system anaerobic filter mode that is crisscross arranged.
4. method according to claim 3 is characterized in that the multistage round-robin first step of anaerobic filter is the upflow type anaerobic filter tank.
5. method according to claim 3 is characterized in that the multistage round-robin last step of anaerobic filter is the upflow type anaerobic filter tank.
6. method according to claim 3 is characterized in that being equipped with the filtrate reflux in the multistage circulation of anaerobic filter.
7. method according to claim 1 is characterized in that to sink the clear liquid sterilization back discharging of deciding the pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112079 CN1132789C (en) | 2000-02-01 | 2000-02-01 | City sewage treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112079 CN1132789C (en) | 2000-02-01 | 2000-02-01 | City sewage treatment technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1259491A CN1259491A (en) | 2000-07-12 |
| CN1132789C true CN1132789C (en) | 2003-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00112079 Expired - Fee Related CN1132789C (en) | 2000-02-01 | 2000-02-01 | City sewage treatment technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1132789C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318328C (en) * | 2005-04-28 | 2007-05-30 | 蒋遂安 | Process for treating organic sewage by three section method and its apparatus |
| CN102381814A (en) * | 2011-10-09 | 2012-03-21 | 天津国水设备工程有限公司 | Integrated rural sewage treatment plant |
| CN102701540A (en) * | 2012-06-28 | 2012-10-03 | 苏州科博思流体科技有限公司 | High-efficiency domestic sewage treatment device |
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2000
- 2000-02-01 CN CN 00112079 patent/CN1132789C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1259491A (en) | 2000-07-12 |
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