CN103086507A - Denitrification and precipitation integrated sewage treatment device and treatment process thereof - Google Patents
Denitrification and precipitation integrated sewage treatment device and treatment process thereof Download PDFInfo
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- CN103086507A CN103086507A CN2013100676490A CN201310067649A CN103086507A CN 103086507 A CN103086507 A CN 103086507A CN 2013100676490 A CN2013100676490 A CN 2013100676490A CN 201310067649 A CN201310067649 A CN 201310067649A CN 103086507 A CN103086507 A CN 103086507A
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Abstract
The invention discloses a denitrification and precipitation integrated sewage treatment device and a treatment process thereof. The treatment device comprises a sewage treatment tank, wherein the sewage treatment tank is sequentially provided with a sludge layer composed of activated sludge, a lower buffer layer, a lower-layer inclined tube, an upper buffer layer, an upper-layer inclined tube and a water outlet channel from bottom to top; a sludge scraper is arranged in the sludge layer and used for stirring and mixing influent sewage and the sludge layer to achieve denitrification effect and entrap suspended solids; and sludge enriched with denitrifying bacteria is attached in the upper-layer inclined tube and the lower-layer inclined tube to achieve the purposes of enhancing denitrification effect and performing solid-liquid separation. The invention has the following advantages: the removal rates of TN (total nitrogen) and COD (chemical oxygen demand) can be simultaneously improved; the treatment device can successfully remove nitrite, nitrate and COD simultaneously and stably; the maximum removal efficiencies of TN and COD in sewage are respectively up to 58% and 23% in the treatment process; and the application of the integrated process achieves the characteristics of small occupied area, convenient operation management, high load rate, short hydraulic retention time and favorable treatment effect.
Description
Technical field
The invention belongs to field of environment engineering technology, be specifically related to a kind of denitrification of be coupled upward flow fixed bed and active sludge and waste disposal plant and the treatment process thereof of precipitation integral.
Background technology
Along with China enters Fast Urbanization developing period, the overall situation that worsens of water surrounding is very severe, the serious problems such as water pollution and eutrophication have generally appearred, these phenomenons cause in short supply, the threat of water security of obstacle, the water resources of some regional water cycles, the deterioration of Ecology, the destruction of water landscape, have become the bottleneck problem of restriction China sustained economic development.A large amount of research is verified, and the nitrogen in sewage and phosphorus are the major causes that causes the receiving water body eutrophication.The B-grade sewage biologic treating technique that in the past adopted is mainly removed organism and suspended solids, place to go efficient to nitrogen and phosphorus is lower, new " urban wastewater treatment firm pollutant emission standard " of promulgating proposed strict requirement to the discharging of the nitrogen phosphorus in sewage, and proposes existing a large amount of municipal sewage plant's upgradings that do not possess the denitrogenation dephosphorizing ability." 12 " energy-saving and emission-reduction in period proposed clear and definite environmental goals: by 2015, the newly-increased sewage daily handling ability forty-two million ton in the whole nation, the COD quantity discharged is subdued 2,800,000 tons, the whole nation realizes that substantially county, emphasis organic town possesses sewage treatment capacity, treatment rate of domestic sewage will reach 85%, and high standard and high growth mean huge technical need.
Ripe Technology and operational management experience make activated sludge process become the widest sewage denitrification and dephosphorization biological treatment of range of application.In the anaerobism section, polyP bacteria discharges phosphorus and absorbs the easily organism of degraded such as lower fatty acid; In the anoxic section, the nitrate that denitrifying bacterium is brought internal reflux into transfers nitrogen to by denitrification overflows, thereby reaches the purpose of denitrogenation; And aerobic section one side degradation of organic substances reaches with ammonia nitrogen the ammonia nitrogen that is become by the organonitrogen ammonification on the other hand and transfers nitrate to by the biological nitration effect.In addition, the phosphorus that discharges of anaerobism section under aerobic condition by activated sludge absorption and reach the purpose of dephosphorization with excess sludge discharge.This technique itself exist nitrifier, denitrifying bacteria and polyP bacteria different mud age, release phosphorus and denitrification to competition and the contradiction of carbon source, be difficult to obtain simultaneously the efficient removal of nitrogen, phosphorus in same system.It is larger that the ammonia complete oxidation of full flow and a high proportion of mixed-liquor return etc. have all caused technique to be taken up an area, and energy consumption is high.
Sewage disposal is as the optimum carrier of putting into practice energy-saving and emission-reduction, and denitrogenation becomes the bottleneck problem of restriction activated sludge process.Anammox, nitrifying process all can comparatively be easy to realize in anaerobism section and aerobic section, but denitrifying control difficulty is large, and stability is not strong, so the bottleneck of biological denitrification process is the denitrification link.
Utilize the advantage of upward flow sludge bed reactor, save the advantage of taking up an area when working in conjunction with inclined-plate clarifying basin, developed a kind of coupling upward flow fixed bed and the denitrifying waste disposal plant of active sludge and treatment process thereof.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, waste disposal plant and the treatment process thereof of a kind of denitrification and precipitation integral are provided, this treatment unit mainly comprises upper and lower layer inclined tube and mud scraper, the mud that described upper and lower layer inclined tube is rich in denitrifying bacterium by employing adheres to intensified anti-nitrated effect, described mud scraper is by adopting grizzly bar to stir, sewage is contacted, to play the effect of the holding back of suspended solids in sewage, denitrification and acidication with the active sludge of high density.
The object of the invention realizes being completed by following technical scheme:
The waste disposal plant of a kind of denitrification and precipitation integral, described sewage comprises former water and Aerobic Pond mixed solution, it is characterized in that described treatment unit comprises a treatment tank, the bottom of described treatment tank is provided with the sludge blanket that is made of active sludge, in described sludge blanket, mud scraper is installed, the top of described sludge blanket is disposed with bottom breaker, lower floor's inclined tube, upper buffer layer, upper strata inclined tube and outlet canal, is attached with the mud that is rich in denitrifying bacterium in wherein said lower floor inclined tube and upper strata inclined tube.
The water inlet pipe of described treatment tank is arranged at described sludge blanket top.
The central axis place of described upper strata inclined tube is provided with the V-notch weir water leg, and is connected with described outlet canal, and the end of described outlet canal is the rising pipe of described treatment tank.
Described mud scraper is made of grizzly bar, suction pipe and pump, and described grizzly bar is placed in described sludge blanket, and the bottom of described suction pipe is arranged in described sludge blanket, and its top is connected with the described pump that is arranged at described outlet canal top; Be provided with sludge out pipe bottom described V-notch weir water leg, described suction pipe is connected with described sludge out pipe by a dredging tube.
The thickness of described sludge blanket is 0.9～1.1m, described bottom breaker height is 0.4～0.6m, and described lower floor inclined tube height is 0.6～0.8m, and described upper buffer layer height is 0.2～0.4m, described upper strata inclined tube height is 0.6～0.8m, the 0.9～1.1m of being separated by between described upper strata inclined tube and liquid level.
A kind for the treatment of process that relates to the waste disposal plant of above-mentioned denitrification and precipitation integral, it is characterized in that treatment process comprises the steps: that at least at first sewage flows into from described water inlet pipe, the grizzly bar that starts in described mud scraper stirs, so that sewage mixes with described sludge blanket, denitrification occurs and hold back suspended solids in sewage; Sewage flows in described lower floor inclined tube and contacts with described denitrifying bacterium in it afterwards, with intensified anti-nitrated effect; Thereafter sewage flows in the inclined tube of described upper strata and the denitrifying bacterium in it contact through described buffer layer, continues the generation denitrification, and separates the suspended solids in described sewage; Sewage after treatment enters described outlet canal, enters described rising pipe after collecting by described V-notch weir water leg; When the activated sludge concentration in described sludge blanket exceeded standard, the pump on described mud scraper drove described suction pipe and begins to inhale mud, and the described active sludge of the part in described sludge blanket is sent into described sludge out pipe by described dredging tube.
Advantage of the present invention is, the clearance of TN and COD can improve simultaneously, and treatment unit realizes that successfully the Simultaneous Stabilization of nitrite, nitrate and COD removes, during in sewage the highest removal efficient of TN and COD reach respectively 58% and 23%; Use this combination process and reach that floor space is little, operational management is easy, rate of load condensate is high, hydraulic detention time is short, treatment effect is good.
Description of drawings
Fig. 1 is the structural representation of the waste disposal plant of denitrification and precipitation integral in the present invention.
Embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1, in figure, mark 1-12 is respectively: water inlet pipe 1, sludge blanket 2, lower floor's inclined tube 3, upper strata inclined tube 4, outlet canal 5, mud scraper 6, grizzly bar 6-1, suction pipe 6-2, pump 6-3, dredging tube 7, sludge out pipe 8, rising pipe 9, V-notch weir water leg 10, bottom breaker 11, upper buffer layer 12.
Embodiment: the present embodiment relates to a kind of coupling upward flow fixed bed and the denitrifying waste disposal plant of active sludge and treatment process thereof, and device mainly comprises: Double-layer oblique tube packing and special-purpose mud scraper.The Double-layer oblique tube packing all adopts the mud that denitrifying bacterium is rich in the filler special reinforcement to adhere to, and increases the concentration of denitrifying bacteria in reactor, intensified anti-nitrated effect.Special-purpose mud scraper by customization grizzly bar stir, water inlet plays by contacting with the active sludge of high density the effect that SS holds back (suspended solids in water), denitrification and acidication simultaneously.
As shown in Figure 1, below describe for the concrete structure of this treatment unit: this treatment unit comprises a rectangle treatment tank, and water inlet pipe 1 and rising pipe 9 lay respectively at the two ends for the treatment of tank, and the significant depth of pond body is about 5m; Set gradually from bottom to top in treatment tank into sludge blanket 2, bottom breaker 11, lower floor's inclined tube 3, on buffer layer 12, upper strata inclined tube 4 and outlet canal 5, the sludge blanket 2 for the treatment of tank bottom is the active sludge of high density, thickness is about 1m, and special-purpose mud scraper 6 is installed in this sludge blanket 2; Bottom breaker 11 between sludge blanket 2 and lower floor's inclined tube 3 highly is about 0.5m; Be attached with the mud that is rich in denitrifying bacterium in lower floor's inclined tube 3, highly be about 0.7m; Upper buffer layer 12 between lower floor's inclined tube 3 and upper strata inclined tube 4 highly is about 0.3m; Be attached with equally the mud that is rich in denitrifying bacterium in the inclined tube of upper strata, highly be about 0.7m; Be about 1m between upper strata inclined tube 4 end faces and liquid level.Water inlet pipe 1 is positioned at sludge blanket 2 above positions, top; Be vertically arranged with V-notch weir water leg 10 on the central axis of upper strata inclined tube 4, outlet canal 5 is connected with V-notch weir water leg 10, and is provided with rising pipe 9 in V-notch weir water leg 10.
As shown in Figure 1, mud scraper 6 mainly comprises grizzly bar 6-1, suction pipe 6-2 and pump 6-3, and grizzly bar 6-1 is arranged in sludge blanket 2, can be rotated stirring movement; The bottom of suction pipe 6-2 is not in sludge blanket 2, and its top is connected with pump 6-3 and is driven by it, in the upper epitaxial of suction pipe 6-2, dredging tube 7 arranged, and dredging tube 7 is connected with the sludge out pipe 8 that is arranged at V-notch weir water leg 10 bottoms.
As shown in Figure 1, the sewage denitrification treatment process specifically comprises the steps:
1. the water inlet pipe 1 for the treatment of unit is positioned at the lower floor for the treatment of tank, and the sewage that flows into from water inlet pipe 1 mainly comprises former water and Aerobic Pond mixed solution; Sludge blanket 2 is positioned at below water inlet pipe 1 height, main by the crowded precipitation formation in lower floor's inclined tube 3 packing area free sedimentations, flocculation sediment and mud district sludge blanket, the similar performance of these mud and traditional active sludge, distinguish under the precipitating action that is by the inclined tube packing area, the very high concentrations of bottom active sludge, can reach 10mg/L, have the denitrifying bacterium of the extremely most amounts of quantity in active sludge, strengthen denitrification; After sewage flowed into, the grizzly bar 6-1 that starts on mud scraper 6 stirred, so that sewage mixes with sludge blanket 2, played that SS holds back and denitrification;
2. after, sewage is in bottom breaker 11 enters lower floor's inclined tube 3, by adhering to the mud effect of being rich in denitrifying bacterium in the inner, intensified anti-nitrated effect, in the former water of sewage, more carbon source is arranged, and has more nitric nitrogen in the Aerobic Pond mixed solution, under anaerobic environment, denitrification is mainly carried out in sludge blanket 2 and lower floor's inclined tube 3 packing areas;
3. sewage is by behind lower floor's inclined tube 3 packing areas, then enter upper strata inclined tube 4 packing areas through upper buffer layer 12, proceed in this regional denitrification, but denitrifying speed has been subject to the inhibition of nitrate, the effect that separates SS in sewage accounts for dominant position;
4. after the denitrification and mud-water separation effect by upper strata inclined tube 4 packing areas, treated sewage enters outlet canal 5, enters rising pipe 9 after collecting by V-notch weir water leg 10;
5. the active sludge in sludge blanket 2 is by after certain hour, when activated sludge concentration during higher than 15mg/L, mud scraper 6 begins to inhale mud, with the part active sludge in sludge blanket 2 under pump 6-3 drives by suction pipe 6-2 sucking-off, send into sludge out pipe 8 through dredging tube 7, be conducive to the renewal of active sludge in treatment unit, guarantee that in reactor, denitrifying bacterium has higher activity.
The characteristics of this technique are that denitrification efficiency is high, floor space is little, due to the denitrifying bacterium of high density being arranged in the Double-layer oblique tube packing, bottom mud has the denitrification function function of conventional activated sludge process simultaneously, so the Denitrification rate of whole pond body significantly improves, the residence time of sewage in the pond can shorten in 1h, saves when improving denitrification efficiency and takes up an area, and has good development prospect aspect the saving floor space.
The unusual effect of the present embodiment is: the clearance of TN and COD can improve simultaneously, and treatment unit realizes that successfully the Simultaneous Stabilization of nitrite, nitrate and COD removes, during in sewage the highest removal efficient of TN and COD reach respectively 58% and 23%.Use that this combination process reaches that floor space is little, operational management is easy, rate of load condensate is high, hydraulic detention time is short, high treating effect and beneficial effect.
Claims (6)
1. the waste disposal plant of a denitrification and precipitation integral, described sewage comprises former water and Aerobic Pond mixed solution, it is characterized in that described treatment unit comprises a treatment tank, the bottom of described treatment tank is provided with the sludge blanket that is made of active sludge, in described sludge blanket, mud scraper is installed, the top of described sludge blanket is disposed with bottom breaker, lower floor's inclined tube, upper buffer layer, upper strata inclined tube and outlet canal, is attached with the mud that is rich in denitrifying bacterium in wherein said lower floor inclined tube and upper strata inclined tube.
2. the waste disposal plant of a kind of denitrification according to claim 1 and precipitation integral, the water inlet pipe that it is characterized in that described treatment tank are arranged at described sludge blanket top.
3. the waste disposal plant of a kind of denitrification according to claim 1 and precipitation integral, the central axis place that it is characterized in that described upper strata inclined tube is provided with the V-notch weir water leg, and be connected with described outlet canal, the end of described outlet canal is the rising pipe of described treatment tank.
4. the waste disposal plant of 3 described a kind of denitrifications and precipitation integral according to claim 1,, it is characterized in that described mud scraper is made of grizzly bar, suction pipe and pump, described grizzly bar is placed in described sludge blanket, the bottom of described suction pipe is arranged in described sludge blanket, and its top is connected with the described pump that is arranged at described outlet canal top; Be provided with sludge out pipe bottom described V-notch weir water leg, described suction pipe is connected with described sludge out pipe by a dredging tube.
5. the waste disposal plant of a kind of denitrification according to claim 1 and precipitation integral, the thickness that it is characterized in that described sludge blanket is 0.9～1.1m, described bottom breaker height is 0.4～0.6m, described lower floor inclined tube height is 0.6～0.8m, described upper buffer layer height is 0.2～0.4m, described upper strata inclined tube height is 0.6～0.8m, the 0.9～1.1m of being separated by between described upper strata inclined tube and liquid level.
6. treatment process that relates to the waste disposal plant of the described denitrification of claim 1-5 and precipitation integral, it is characterized in that treatment process comprises the steps: that at least at first sewage flows into from described water inlet pipe, the grizzly bar that starts in described mud scraper stirs, so that sewage mixes with described sludge blanket, denitrification occurs and hold back suspended solids in sewage; Sewage flows in described lower floor inclined tube and contacts with described denitrifying bacterium in it afterwards, with intensified anti-nitrated effect; Thereafter sewage flows in the inclined tube of described upper strata and the denitrifying bacterium in it contact through described buffer layer, continues the generation denitrification, and separates the suspended solids in described sewage; Sewage after treatment enters described outlet canal, enters described rising pipe after collecting by described V-notch weir water leg; When the activated sludge concentration in described sludge blanket exceeded standard, the pump on described mud scraper drove described suction pipe and begins to inhale mud, and the described active sludge of the part in described sludge blanket is sent into described sludge out pipe by described dredging tube.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019741A1 (en) * | 2005-08-19 | 2007-02-22 | Aquanova Gmbh | Water recirculation plant for pisciculture and fish feeding, includes water distribution assembly, flooded bioreactors for microbiological water nitrification, sedimentation filters, fish basins, pump chamber with water supply plant |
| CN201400627Y (en) * | 2009-02-27 | 2010-02-10 | 丁晓 | All-in-one water processing device |
| CN101823814A (en) * | 2010-03-30 | 2010-09-08 | 环境保护部华南环境科学研究所 | Method and system of integrated denitrifying phosphorus and nitrogen removal |
| CN203295259U (en) * | 2013-03-04 | 2013-11-20 | 上海市政工程设计研究总院（集团）有限公司 | Denitrification and precipitation integrated sewage treatment device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019741A1 (en) * | 2005-08-19 | 2007-02-22 | Aquanova Gmbh | Water recirculation plant for pisciculture and fish feeding, includes water distribution assembly, flooded bioreactors for microbiological water nitrification, sedimentation filters, fish basins, pump chamber with water supply plant |
| CN201400627Y (en) * | 2009-02-27 | 2010-02-10 | 丁晓 | All-in-one water processing device |
| CN101823814A (en) * | 2010-03-30 | 2010-09-08 | 环境保护部华南环境科学研究所 | Method and system of integrated denitrifying phosphorus and nitrogen removal |
| CN203295259U (en) * | 2013-03-04 | 2013-11-20 | 上海市政工程设计研究总院（集团）有限公司 | Denitrification and precipitation integrated sewage treatment device |
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