CN104445617B - A kind of complex biological strengthened denitrification oxidation ditch system - Google Patents
A kind of complex biological strengthened denitrification oxidation ditch system Download PDFInfo
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Abstract
The present invention relates to a kind of complex biological strengthened denitrification oxidation ditch system and technique, belong to sewage disposal, field of environment protection。, effluent quality not enough for the denitrification ability of low hydraulic detention time oxidation ditch is lower than the problem of existing sewage standard, invent and a kind of take up an area little and that denitrification effect is good compound oxidizing trench system and technique, can be used for the newly-built Sewage Plant that land used is nervous, it is also possible to the low cost of the oxidation ditch of total nitrogen and ammonia nitrogen discharge original Sewage Plant not up to standard proposes mark transformation under low hydraulic detention time。The innovative point of the present invention is in that: biological reinforced nitrification zone。The tap drain road of oxidation ditch isolates biological reinforced nitrification zone, and load multiporous biological filler, microorganism concn is substantially improved, enrichment culture nitrifier (nitrococcus) and denitrifying bacterium, break through in short hydraulic detention time oxidation ditch, complete biological nitration and denitrifying bottleneck, realize simultaneous nitrification-denitrification, the denitrification efficiency being substantially improved under low hydraulic detention time " de-carbon type " oxidation ditch。
Description
Technical field
The present invention relates to a kind of complex biological strengthened denitrification oxidation ditch system and technique, belong to sewage disposal, field of environment protection。The newly-built Sewage Plant two stage biological putting forward mark transformation and land used anxiety discharging municipal wastewater treatment plant not up to standard suitable in total nitrogen and ammonia nitrogen processes technique。
Background technology
Oxidation ditch is the sewage treatment process of a kind of common employing activated sludge process。Typical oxidation ditch uses a kind of aeration with direction controlling and agitating device, horizontal velocity is transmitted to the material in reaction tank, so that the liquid being stirred circulates in closed type channel, the dissolved oxygen of mixed liquor changes along ditch length, form anoxic zone and aerobic zone, removing organic pollution, denitrogenation dephosphorizing, effluent quality is good。Oxidation ditch motility and extremely well-adapted, be therefore widely used, and quickly grows, of a great variety。But, for the oxidation ditch of low hydraulic detention time, it is respond well that it removes BOD, COD etc., but owing to its hydraulic detention time is shorter, nitration denitrification is abundant all not, thus denitrification ability is not enough, and effluent quality is lower than existing sewage quality standard。Therefore, for the oxidation ditch of low hydraulic detention time, it is badly in need of carrying out transforming or newly-built, to improving its denitrification ability, makes water outlet total nitrogen, ammonia nitrogen up to standard。
The improvement of sewage effluents water quality is realized mainly through increasing advanced treating structures after two stage treatment technical field involved in the present invention, domestic scholars and project planner。This kind of Technical comparing is ripe, but is difficult to apply in the Sewage Plant lacking reorganization and expansion land used, and construction investment and operating cost are intended to dramatically increase。When not newly increasing process structures, scholars have developed very eurypalynous compound oxidizing ditch, have by change fluidised form thus optimizing the nitrogen removal performance of oxidation ditch, what have carries out subregion isolation by anaerobic zone, anoxic zone, aerobic zone, and what have builds SBR pond jointly inside oxidation ditch。These inventions are substantially all and achieve beneficial effect, but mostly pond holds greatly, floor space is big, is not suitable for the transformation to original oxidation ditch。In addition, also scholar is had to test the mode adding floating stuffing in oxidation ditch to improve microbial biomass in oxidation ditch, and then raising biological treatment efficiency, but owing to not fully taking into account the characteristics of fluid state of oxidation ditch high flow rate, and organic matter degradation microorganism and denitrogenate between microorganism collaborative and competitive relation, the operational management of oxidizing ditch will bringing extreme difficulties, its efficiencies of nitrogen removal is also undesirable。The developed countries such as America and Europe then have by arranging hollow fiber membrane filtration system in oxidation ditch, and the mode that oxidation ditch is changed into membrane bioreactor (MBR) is run, to improve the treatment effeciency of oxidation ditch。This method can be obviously improved the microbial biomass in oxidation ditch, and process effluent quality be substantially improved, but investment, operating cost are all significantly high, and management technique difficulty is also very big, is not appropriate for developing country and adopts。
According to statistics, the first batch of municipal wastewater treatment plant in Three Gorge Reservoir Region in Chongqing have 70% to use oxidation ditch process, ammonia nitrogen≤15mg/l in the primary standard of the specification " integrated wastewater discharge standard " (GB8978-1996) adopted during design at that time, to total nitrogen not requirement, and the one-level B mark of existing " town sewage plant pollutant emission standard " (GB189182002) requires ammonia nitrogen≤8mg/l, total nitrogen≤20mg/l。Visible, the oxidation ditch denitrification ability of these water factories is substantially not enough。Owing to most plant area land used is nervous, therefore the low cost of not newly-increased structures is put forward mark renovation technique demand very urgent。Simultaneously for the newly-built Sewage Plant that land used is nervous, invent a kind of take up an area little and under short hydraulic detention time can efficient denitrification, oxidation ditch that effluent quality is good, be also very necessary。Therefore, a kind of biological reinforced denitrogenation oxidation ditch that the present invention relates to and technique have very big application prospect and the market demand。
Summary of the invention
The technical issues that need to address of the present invention are: the denitrification ability existed for low hydraulic detention time oxidation ditch is not enough, effluent quality is lower than the problem of existing sewage standard, and for original Sewage Plant plant area land used anxiety problem, the rebuilding at low cost technology of a kind of not newly-increased structures is provided, it is the nervous newly-built Sewage Plant of land used, it is provided that a kind of take up an area little and that effluent quality is good oxidation Ditch Technology simultaneously。A kind of complex biological strengthened denitrification oxidation ditch system of invention and technique, enhanced biological nitrogen removal ability, so that effluent quality, particularly total nitrogen, ammonia nitrogen reach the primary standard of " town sewage plant pollutant emission standard " (GB189182002)。
Employed technical scheme comprise that such for realizing the object of the invention, a kind of complex biological strengthened denitrification oxidation ditch system, it is characterised in that: include an oxidation ditch surrounded by pool wall。The tap drain road of oxidation ditch includes biological denitrification district and oxidation operation district, and isolation is provided with independent biological reinforced nitrification zone。Described biological denitrification district is anoxic zone, and oxidation operation district is aerobic zone, and the intersection in biological denitrification district and oxidation operation district is provided with aerator。The initiating terminal of described biological reinforced nitrification zone is positioned at described oxidation operation district, the endcapped of described biological reinforced nitrification zone。
In the process that sewage flows in oxidation ditch tap drain road, after flowing through oxidation operation district, a part of sewage flows into described biological reinforced nitrification zone from the initiating terminal of biological reinforced nitrification zone。By water pump, the sewage of biological reinforced nitrification zone end is extracted in tap drain road, then proceedes to circulate in tap drain road。
Described biological reinforced nitrification zone is not blocked tap drain road, only accounts for the part in tap drain road, is separated by partition wall (enclosing material) and tap drain road, loading multiporous biological filler, carrying out aeration, thus strengthening Nitrification。
Further, described oxidation ditch includes one section of training wall being arranged in pool wall。The upper end of described training wall is higher than the horizontal plane in oxidation ditch。
Dividing plate I and dividing plate II are connected with training wall, and tap drain road isolates a counter drain road。Namely described counter drain road is biological reinforced nitrification zone。In described biological reinforced nitrification zone, it is provided with deflection plate (deflection plate I, II) alternatively up and down, to extend hydraulic detention time, loads multiporous biological filler between adjacent baffle, increase microbe density。The initiating terminal of described biological reinforced nitrification zone is positioned at described oxidation operation district, the endcapped of described biological reinforced nitrification zone。
The water inlet of described biological reinforced nitrification zone initiating terminal is provided with up flow type swash plate device for separating mud and water, and the sewage flowing into biological reinforced nitrification zone is carried out mud-water separation。Further, described oxidation ditch includes one section of training wall being arranged in pool wall。One end of described training wall is provided with dividing plate III, the other end is provided with dividing plate IV。It is provided with dividing plate V between described dividing plate III and dividing plate IV。
Described dividing plate III lower end is connected to the bottom of oxidation ditch, and the two ends, left and right of dividing plate III are connected on training wall and pool wall, and the upper end of dividing plate III is higher than the horizontal plane in oxidation ditch。
Having gap between described dividing plate IV lower end and the bottom of oxidation ditch, the two ends, left and right of dividing plate IV are connected on training wall and pool wall, and the upper end of dividing plate IV is higher than the horizontal plane in oxidation ditch。
Described dividing plate V lower end is connected to the bottom of oxidation ditch, and the two ends, left and right of dividing plate V are connected on training wall and pool wall, and the upper end of dividing plate V is lower than the horizontal plane in oxidation ditch。
Up flow type swash plate device for separating mud and water is set between described dividing plate IV and dividing plate V。
It is provided with multiporous biological filler between described dividing plate III and dividing plate IV。
When oxidation ditch runs, with water pump, dividing plate III is extracted into dividing plate III dividing plate IV side dorsad towards the sewage of dividing plate IV side, makes the water outlet of biological reinforced nitrification zone mix in tap drain road water, and continue cycling through flowing。
Further, some pieces of deflection plates I and some pieces of deflection plates II are also included。Deflection plate I and deflection plate II it is alternately arranged between described dividing plate III and dividing plate IV。
Having gap between described deflection plate I lower end and the bottom of oxidation ditch, the two ends, left and right of deflection plate I are connected on partition wall and pool wall, and the upper end of deflection plate I is higher than the horizontal plane in oxidation ditch。
Deflection plate II lower end is connected to the bottom of oxidation ditch, and the two ends, left and right of deflection plate II are connected on partition wall (4,1041,1) and pool wall, and the upper end of deflection plate II is lower than the horizontal plane in oxidation ditch。
Further, bottom up flow type swash plate device for separating mud and water, mud accumulation area arranges a slope。Described swash plate device for separating mud and water bottom connects with tap drain road。Slope aspect tap drain road, described slope。
Further, aerating system is set in bottom, biological reinforced nitrification zone。These aerating systems are arranged on bottom the oxidation ditch between described dividing plate III and dividing plate IV。
Invention additionally discloses a kind of complex biological strengthened denitrification oxidation ditch process that have employed said system, it is characterized in that: the water inlet pipe that sewage is arranged from oxidation ditch flows in biological denitrification district, and cyclically flows through biological denitrification district and oxidation operation district successively。When sewage is behind oxidation operation district, being partly into described biological reinforced nitrification zone, a part continues flowing in tap drain road。In the end separator of described biological reinforced nitrification zone, water pump is set, the sewage of described biological reinforced nitrification zone is extracted in tap drain road, continues cycling through flowing。
The biologic packing material of described biological reinforced nitrification zone filling, in oxidation ditch initial operation phase, need to carry out biofilm process, increases microbe density, until biofilm formation and stably after, can be properly functioning。
Described biological reinforced nitrification zone to carry out aeration, makes microorganism be in aerobic environment, thus being beneficial to the enrichment of nitrobacteria and the carrying out of Nitrification。
The solution have the advantages that mathematical, when not newly-increased constructing, the oxidation ditch of low hydraulic detention time is carried out rebuilding at low cost, strengthen the nitration denitrification usefulness of short hydraulic detention time internal oxidition ditch, denitrification ability is greatly improved, makes effluent quality indices all reach existing sewage quality primary standard。A kind of complex biological strengthened denitrification oxidation ditch system and the technique of a kind of newly-built plant area nervous suitable in land used have been invented simultaneously。
Accompanying drawing explanation
The plane graph that Fig. 1 is the present invention；
Fig. 2 is the A-A profile stretch-out view of Fig. 1；
Fig. 3 is the B-B sectional view of Fig. 1；
Fig. 4 is existing oxidation ditch schematic diagram。
In figure: oxidation ditch 1, water inlet pipe 101, outlet pipe 102, demarcation strip 103, training wall 104, dividing plate I 1041, dividing plate II 1042, the aerator of falling umbrella 105, anaerobic pond 106, pool wall 107, deflection plate I 2, deflection plate II 3, dividing plate III 4, aerating system 5, multiporous biological filler 6, up flow type swash plate device for separating mud and water 7, dividing plate IV 701, dividing plate V 702, slope 8
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention and be only limitted to following embodiment。Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should include in protection scope of the present invention。
Embodiment 1:
Present embodiment discloses a kind of complex biological strengthened denitrification oxidation ditch system, including an oxidation ditch surrounded by pool wall 107 1。The tap drain road of oxidation ditch 1 includes biological denitrification district and oxidation operation district, and isolation is provided with independent biological reinforced nitrification zone。Described biological denitrification district is anoxic zone, and oxidation operation district is aerobic zone, and the intersection in biological denitrification district and oxidation operation district is provided with aerator。As existing oxidation ditch 1, sewage is continuously flowed into biological denitrification district from water inlet pipe 101, flowing into oxidation operation district again, and cyclically flow between biological denitrification district and oxidation operation district, a part of sewage flows out from being arranged on oxidation operation district outlet pipe 102 continuously simultaneously。
With existing oxidation ditch the difference is that, in embodiment, described biological reinforced nitrification zone is special setting, and its initiating terminal is positioned at described oxidation operation district, the endcapped of described biological reinforced nitrification zone。
In the process that sewage flows in oxidation ditch tap drain road, after flowing through oxidation operation district, a part of sewage flows into described biological reinforced nitrification zone from the initiating terminal of biological reinforced nitrification zone。By water pump, the sewage of biological reinforced nitrification zone end is extracted in tap drain road, then proceedes to circulate in tap drain road。
Described biological reinforced nitrification zone is not blocked tap drain road, only accounts for the part in tap drain road, is separated by partition wall (enclosing material) and tap drain road, loading multiporous biological filler, carrying out aeration, thus strengthening Nitrification。
Embodiment 2
Biological reinforced nitrification zone is further illustrated by the present embodiment on embodiment 1 basis, and described oxidation ditch 1 includes one section of training wall being arranged in pool wall 107 104。The upper end of described training wall 104 is higher than the horizontal plane in oxidation ditch 1。
Dividing plate I 1041 and dividing plate II 1042 are connected with training wall 104, and tap drain road isolates a counter drain road。Namely described counter drain road is biological reinforced nitrification zone。Referring to accompanying drawing, described training wall 104 is parallel to pool wall, and is parallel to the direction of fluid motion。Owing to the tap drain road, one end of oxidation ditch 1 is therefrom separated (being divided into two) by this training wall 104；A secondary water channel is made in the side (side towards pool wall) of training wall 104 by the present embodiment just, in order to arrange biological reinforced nitrification zone。In embodiment, dividing plate I 1041 and dividing plate II 1042 are connected on the two ends of training wall 104 respectively, substantially extend training wall 104, have namely isolated biological reinforced nitrification zone from tap drain road。
The water inlet of described biological reinforced nitrification zone initiating terminal is provided with up flow type swash plate device for separating mud and water 7, and the sewage flowing into biological reinforced nitrification zone is carried out mud-water separation。Multiporous biological filler 6 is loaded in described biological reinforced nitrification zone。
Embodiment 3:
The present embodiment discloses a kind of compound Carrousel oxidation ditch system, including Carrousel oxidation ditch 1, and is arranged on the biological reinforced nitrification zone in Carrousel oxidation ditch 1 and water pump。Described Carrousel oxidation ditch 1 is existing equipment, and its structure is disclosed document and records。Referring to accompanying drawing 4, figure is a common Carrousel oxidation ditch 1, including water inlet pipe 101, outlet pipe 102, the aerator of falling umbrella 105, midfeather 103 and training wall 104。From plane graph, this Carrousel oxidation ditch 1 is the ellipse that pool wall 107 surrounds。Described midfeather 103 is positioned at Carrousel oxidation ditch 1 central authorities, and Carrousel oxidation ditch 1 is not cut off by the two ends of midfeather 103。The described aerator of falling umbrella 105 is used for increasing dissolved oxygen。Sewage flows into Carrousel oxidation ditch 1 from described water inlet pipe 101, and midfeather 103 is anaerobic zone, i.e. denitrification zone towards the side of water inlet pipe 101；Demarcation strip 103 is aerobic zone towards the side of outlet pipe 102 (dorsad water inlet pipe 101), i.e. oxidation operation district (de-carbon district)。
Described Carrousel oxidation ditch 1 includes one section of training wall being arranged in pool wall 107 104。Referring to Fig. 2, the upper end of described partition wall 104,1041,1042 is higher than the horizontal plane in Carrousel oxidation ditch 1。Referring to Fig. 1 or 3, described training wall 104 is positioned at the side of demarcation strip 103, all has gap between described partition wall 104 and pool wall 107 and midfeather 103。A secondary water channel is formed between described training wall 104 and pool wall 107。Namely the water inlet of the described biological reinforced nitrification zone in existing Carrousel oxidation ditch 1 and outlet lay respectively at the two ends (origin or beginning and end) of training wall 104。
In the present embodiment, one end (water inlet of biological reinforced nitrification zone) of described partition wall 104 is provided with dividing plate IV701, the other end (end of biological reinforced nitrification zone) is provided with dividing plate III 4。It is provided with dividing plate V 702 between described dividing plate III 4 and dividing plate IV 701。
Described dividing plate III 4 lower end is connected to the bottom of Carrousel oxidation ditch 1, and the two ends, left and right of dividing plate III 4 are connected on training wall 104 and pool wall 107, and the upper end of dividing plate III 4 is higher than the horizontal plane in Carrousel oxidation ditch 1。Namely the water side of described biological reinforced nitrification zone is completely enclosed by described dividing plate III 4。
Having gap between described dividing plate IV 701 lower end and the bottom of Carrousel oxidation ditch 1, the two ends, left and right of dividing plate IV 701 are connected on training wall 104 and pool wall 107, and the upper end of dividing plate IV 701 is higher than the horizontal plane in Carrousel oxidation ditch 1。Namely the water inlet (leaving water inlet below dividing plate IV 701) of described swash plate device for separating mud and water not exclusively closed by described dividing plate IV 701。
Described dividing plate V 702 lower end is connected to the bottom of Carrousel oxidation ditch 1, and the two ends, left and right of dividing plate V 702 are connected on training wall 104 and pool wall 107, and the upper end of dividing plate V 702 is lower than the horizontal plane in Carrousel oxidation ditch 1。Namely the water inlet (dividing plate V 702 is reserved above with water inlet) of described biological reinforced nitrification zone not exclusively closed by described dividing plate V 702。
Up flow type swash plate device for separating mud and water 7 is set between described dividing plate IV 701 and dividing plate V 702。Namely described up flow type swash plate device for separating mud and water 7 is arranged between dividing plate IV 701 and the relative plate face of dividing plate V 702, fills up the space between described dividing plate IV 701 and the relative plate face of dividing plate V 702。In embodiment, described up flow type swash plate device for separating mud and water 7 includes some swash plates, and these swash plates are fixed between dividing plate IV 701 and dividing plate V 702。In embodiment, the sewage in Carrousel oxidation ditch 1 enters described up flow type swash plate device for separating mud and water 7 by the water inlet below dividing plate IV 701 in cyclic process。At this time, mud drops into the slope 8 below up flow type swash plate device for separating mud and water 7, thus slipping into the bottom of Carrousel oxidation ditch 1。And remove sewage the spilling over from up flow type swash plate device for separating mud and water 7 of mud, and flowing over from dividing plate V 702, continue to flow into described biological reinforced nitrification zone。
It is provided with multiporous biological filler 6 between described dividing plate III 4 and dividing plate IV 701。Namely described multiporous biological filler 6 is arranged in described biological reinforced nitrification zone。Described multiporous biological filler 6 is cultivated and is enriched with nitrifier (nitrococcus) and a small amount of denitrifying bacterium。The upper end of described multiporous biological filler 6 is positioned under the horizontal plane of sewage, lower end is positioned at above the bottom surface of Carrousel oxidation ditch 1。When sewage flows through described biological reinforced nitrification zone, in multiporous biological filler 6, the microorganism of load acts in contrast, the purpose nitrated to reach strengthening。
Due to the end seal of described biological reinforced nitrification zone, when Carrousel oxidation ditch 1 runs, dividing plate III 4 is extracted into dividing plate III 4 dividing plate IV 701 side dorsad towards the liquid of dividing plate IV 701 side by described submersible sewage pump。Namely the sewage of described biological reinforced nitrification zone end is extracted out described biological reinforced nitrification zone by submersible sewage pump so that it is continue to circulate in Carrousel oxidation ditch 1。
Embodiment 4:
A kind of compound oxidizing trench system, including oxidation ditch 1, and is arranged on the biological reinforced nitrification zone in oxidation ditch 1 and water pump。Described oxidation ditch 1 is existing equipment, and its structure is disclosed document and records。Referring to the oxidation ditch 1 in accompanying drawing 1, figure, including water inlet pipe 101, outlet pipe 102, the aerator of falling umbrella 105, midfeather 103 and training wall 104。From plane graph, this oxidation ditch 1 is the ellipse that pool wall 107 surrounds。Described midfeather 103 is positioned at oxidation ditch 1 central authorities, and oxidation ditch 1 is not cut off by the two ends of midfeather 103。Bottom in described oxidation ditch 1 is additionally provided with the aerator of falling umbrella 105, and the described aerator of falling umbrella 105 is used for increasing dissolved oxygen。Sewage flows into oxidation ditch 1 from described water inlet pipe 101, and midfeather 103 is anoxic zone, i.e. denitrification zone towards the side of water inlet pipe 101；Midfeather 103 is aerobic zone towards the side of outlet pipe 102 (dorsad water inlet pipe 101), i.e. oxidation operation district (de-carbon district)。
Described oxidation ditch 1 includes one section of training wall being arranged in pool wall 107 104。Referring to Fig. 2, the described aerator of falling umbrella 105 and be positioned at training wall 104 and lay respectively at the both sides of midfeather 103。The upper end of described training wall 104 is higher than the horizontal plane in oxidation ditch 1。Referring to Fig. 1 or 3, the side of the centrally located partition wall 103 of described training wall 104, between described training wall 104 and pool wall 107, form a secondary water channel。Namely the origin or beginning of the described biological reinforced nitrification zone in existing oxidation ditch 1 and end lay respectively at the two ends of training wall 104。In embodiment, the two ends of described training wall 104 are connecting partition I 1041 and dividing plate II 1042 respectively。The lower end of described dividing plate I 1041 and dividing plate II 1042 is connected to the bottom of oxidation ditch 1；The upper end of described dividing plate I 1041 and dividing plate II 1042 is higher than the horizontal plane of sewage in oxidation ditch 1。Described dividing plate I 1041 and dividing plate II 1042 are integrally formed new partition wall 104 with original training wall 104。
In the present embodiment, one end (water inlet of biological reinforced nitrification zone) of described new partition wall 104 is provided with dividing plate III 4, the other end (biological reinforced nitrification zone end) is provided with dividing plate IV 701。It is provided with dividing plate V 702 between described dividing plate III 4 and dividing plate IV 701。
Described dividing plate III 4 lower end is connected to the bottom of oxidation ditch 1, the two ends, left and right of dividing plate III 4 are connected on partition wall 104 and pool wall 107 (being also likely to be the plate face for the dividing plate I 1041 or dividing plate II 1042 extending partition wall 104), and the upper end of dividing plate III 4 is higher than the horizontal plane in Carrousel oxidation ditch 1。Namely the water side of described biological reinforced nitrification zone is completely enclosed by described dividing plate III 4。
Between described dividing plate IV 701 lower end and the bottom of oxidation ditch 1, there is gap, the two ends, left and right of dividing plate IV 701 are connected to training wall 104 (being also likely to be the plate face for the dividing plate I 1041 or dividing plate II 1042 extending partition wall 104) and pool wall 107, and the upper end of dividing plate IV 701 is higher than the horizontal plane in oxidation ditch 1。Namely the water inlet (leaving water inlet below dividing plate IV 701) of described swash plate device for separating mud and water not exclusively closed by described dividing plate IV 701。
Described dividing plate V 702 lower end is connected to the bottom of oxidation ditch 1, the two ends, left and right of dividing plate V 702 are connected on training wall 104 and pool wall 107 (being also likely to be the plate face for the dividing plate I 1041 or dividing plate II 1042 extending partition wall 104), and the upper end of dividing plate V 702 is lower than the horizontal plane in oxidation ditch 1。Namely the water inlet (dividing plate V 702 is reserved above with water inlet) of described biological reinforced nitrification zone not exclusively closed by described dividing plate V 702。
Up flow type swash plate device for separating mud and water 7 is set between described dividing plate IV 701 and dividing plate V 702。Namely described up flow type swash plate device for separating mud and water 7 is arranged between dividing plate IV 701 and the relative plate face of dividing plate V 702, closes the space between dividing plate IV 701 and the relative plate face of dividing plate V 702 described in filling up。In embodiment, described up flow type swash plate device for separating mud and water 7 includes some swash plates, and these swash plates are fixed between dividing plate IV 701 and dividing plate V 702。In embodiment, after the sewage in oxidation ditch 1 enters described swash plate device for separating mud and water 7 by the water inlet below dividing plate IV 701 in cyclic process, enter below up flow type swash plate device for separating mud and water 7 from described up flow type swash plate device for separating mud and water 7。At this time, mud drops into the slope 8 below up flow type swash plate device for separating mud and water 7, thus being slipped to the bottom of oxidation ditch 1。And go out sewage the spilling over from up flow type swash plate device for separating mud and water 7 of mud flowing over from dividing plate V 702, continue to flow into described biological reinforced nitrification zone。Described slope 8 is 10 °, the mud that up flow type swash plate device for separating mud and water 7 described in access filters, and makes it be slipped in tap drain road。
The present embodiment also includes some pieces of deflection plates I 2 and some pieces of deflection plates II 3。Deflection plate I 2 and deflection plate II 3 it is alternately arranged between described dividing plate III 4 and dividing plate IV 701。Fewer than deflection plate II 3 one piece of described deflection plate I 2, deflection plate II 3 has at least two pieces。In embodiment, there are four pieces of deflection plates I 2 and five pieces of deflection plates II 3。Dividing plate III 4 is adjacent with one piece of deflection plate II 3 towards the side of described biological reinforced nitrification zone；Described dividing plate IV 701 is adjacent with another block deflection plate II 3 towards the side of dividing plate III 4 equally。
Between described deflection plate I 2 lower end and the bottom of oxidation ditch 1, there is gap, the two ends, left and right of deflection plate I 2 are connected on training wall 104 and pool wall 107 (being also likely to be the plate face for the dividing plate I 1041 or dividing plate II 1042 extending training wall 104), and the upper end of deflection plate I 2 is higher than the horizontal plane in oxidation ditch 1。Deflection plate II 3 lower end is connected to the bottom of oxidation ditch 1, the two ends, left and right of deflection plate II 3 are connected on training wall 104 and pool wall 107 (being also likely to be the plate face for the dividing plate I 1041 or dividing plate II 1042 extending training wall 104), and the upper end of deflection plate II 3 is lower than the horizontal plane in oxidation ditch 1。Described biological reinforced nitrification zone is thus made to be divided into " it " word structure。
It is provided with multiporous biological filler 6 between described dividing plate III 4 and dividing plate IV 701。Namely described multiporous biological filler 6 is arranged in described biological reinforced nitrification zone。The upper end of described multiporous biological filler 6 is positioned under the horizontal plane of sewage, lower end is positioned at above the bottom surface of oxidation ditch 1。When sewage flows through described biological reinforced nitrification zone, in multiporous biological filler 6, the microorganism of load acts in contrast, the purpose nitrated to reach strengthening。In the present embodiment, owing to there is deflection plate I 2 ratio deflection plate II 3, described multiporous biological filler 6 has some pieces。These multiporous biological fillers 6 are arranged in deflection plate I 2, deflection plate II 3, dividing plate IV 701 and dividing plate III 4 between any plank two pieces adjacent so that when sewage flows in described biological reinforced nitrification zone, repeatedly through multiporous biological filler 6。
Due to the end seal of described biological reinforced nitrification zone, when oxidation ditch 1 runs, dividing plate III 4 is extracted into dividing plate III 4 dividing plate IV 701 side dorsad towards the liquid of dividing plate IV 701 side by described submersible sewage pump。Namely extract the sewage of described biological reinforced nitrification zone end out described biological reinforced nitrification zone by submersible sewage pump so that it is mix with tap drain road sewage, and continue to circulate in oxidation ditch 1。
Preferably, aerating system 5 is also included。These aerating systems 5 be arranged between described dividing plate III 4 and dividing plate IV 701 (in described biological reinforced nitrification zone) oxidation ditch 1 bottom。In the present embodiment, having nine described aerating systems 5, these aerating systems 5 are positioned at the lower section of each block of described multiporous biological filler 6。These aerating systems 5 are for increasing the dissolved oxygen of the sewage in described biological reinforced nitrification zone, to promote Nitrification。
Embodiment 5
The present embodiment is the complex biological strengthened denitrification oxidation ditch process that have employed any of the above-described embodiment (particularly embodiment 1) described system, the water inlet pipe 101 that sewage is arranged from oxidation ditch 1 flows in biological denitrification district, and cyclically flows through biological denitrification district and oxidation operation district successively。When sewage is behind oxidation operation district, being partly into described biological reinforced nitrification zone, a part continues flowing in tap drain road。In the end separator of described biological reinforced nitrification zone, submersible sewage pump is set, the sewage of described biological reinforced nitrification zone is extracted in tap drain road, continues cycling through flowing。
The biologic packing material of described biological reinforced nitrification zone filling, in oxidation ditch 1 initial operation phase, need to carry out biofilm process, increases microbe density, until biofilm formation and stably after, can be properly functioning。In the present embodiment, biological reinforced nitrification zone biologic packing material, adopt activated sludge inoculated and cultured filler。When taking out mud mixture from oxidation ditch to behind biological reinforced nitrification zone, vexed exposure 2d, then changes water vexed exposure 1d again。Vexed exposure starts after terminating, from continuum micromeehanics, to cultivate 1 month。When naked-eye observation to filling surface is light yellow, the visible campanularian of microscopy, wheel animalcule etc., and biological reinforced nitrification zone stable effluent quality, it was shown that biofilm success。
Described biological reinforced nitrification zone to carry out aeration, makes microorganism be in aerobic environment, thus being beneficial to the enrichment of nitrobacteria and the carrying out of Nitrification。
Adopt the effect of existing oxidation ditch: influent quality is: CODCrContent is 400 to 500mg/l, BOD5Content is 200 to 300mg/l, TN content is 50 to 60mg/l, NH4 +-N content is 40-50mg/l, and hydraulic detention time is 7.1h；The effect of the present embodiment: after this complex biological strengthened denitrification oxidation ditch system processes, effluent quality is: CODCrContent is less than 60mg/l, BOD5Content less than 20mg/l, TN content less than 20mg/l, NH4 +-N content, less than 8mg/l, reaches the one-level B mark of " town sewage plant pollutant emission standard " (GB189182002)。
Claims (1)
1. a complex biological strengthened denitrification oxidation ditch system, it is characterised in that: include an oxidation ditch (1) surrounded by pool wall (107)；The tap drain road of oxidation ditch (1) includes biological denitrification district and oxidation operation district, and isolation is provided with independent biological reinforced nitrification zone；Described biological denitrification district is anoxic zone, and oxidation operation district is aerobic zone, and the intersection in biological denitrification district and oxidation operation district is provided with aerator；The initiating terminal of described biological reinforced nitrification zone is positioned at described oxidation operation district, the endcapped of described biological reinforced nitrification zone；
In the process that sewage flows in oxidation ditch tap drain road, after flowing through oxidation operation district, a part of sewage flows into described biological reinforced nitrification zone from the initiating terminal of biological reinforced nitrification zone；By water pump, the sewage of biological reinforced nitrification zone end is extracted in tap drain road, then proceedes to circulate in tap drain road；
Described oxidation ditch (1) includes one section of training wall (104) being arranged in pool wall (107)；The upper end of described training wall (104) is higher than the horizontal plane in oxidation ditch (1)；
Dividing plate I (1041) and dividing plate II (1042) are connected with training wall (104), and tap drain road isolates a counter drain road；Namely described counter drain road is biological reinforced nitrification zone；
The water inlet of described biological reinforced nitrification zone initiating terminal is provided with up flow type swash plate device for separating mud and water (7), and the sewage flowing into biological reinforced nitrification zone is carried out mud-water separation；Multiporous biological filler (6) is loaded in described biological reinforced nitrification zone。
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| CN110540294A (en) * | 2019-08-27 | 2019-12-06 | 首创爱华(天津)市政环境工程有限公司 | System and process for biologically enhanced denitrification ASH oxidation ditch |
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| US4548712A (en) * | 1977-11-04 | 1985-10-22 | Reid John H | Conservation of momentum in a barrier oxidation ditch |
| CN1376642A (en) * | 2001-03-27 | 2002-10-30 | 中国科学院生态环境研究中心 | Equipment and process for treating sewage by integrated oxidizing ditch with 3D circulation |
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| JP2002320994A (en) * | 2001-04-24 | 2002-11-05 | Sumitomo Heavy Ind Ltd | Method for operating oxidation ditch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4548712A (en) * | 1977-11-04 | 1985-10-22 | Reid John H | Conservation of momentum in a barrier oxidation ditch |
| CN1376642A (en) * | 2001-03-27 | 2002-10-30 | 中国科学院生态环境研究中心 | Equipment and process for treating sewage by integrated oxidizing ditch with 3D circulation |
Non-Patent Citations (1)
| Title |
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| 内置生物强化区用于Carrousel氧化沟提标改造研究;何强等;《中国给水排水》;20141031;第30卷(第19期);第11-14页 * |
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