CN102689988B - Carbon-oxygen combined regulatory denitrification system for horizontal underflow constructed wetlands - Google Patents
Carbon-oxygen combined regulatory denitrification system for horizontal underflow constructed wetlands Download PDFInfo
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- CN102689988B CN102689988B CN201210126651.6A CN201210126651A CN102689988B CN 102689988 B CN102689988 B CN 102689988B CN 201210126651 A CN201210126651 A CN 201210126651A CN 102689988 B CN102689988 B CN 102689988B
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- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 11
- 238000005273 aeration Methods 0.000 claims abstract description 41
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 30
- 239000002689 soil Substances 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 239000008103 glucose Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
- 229930006000 Sucrose Natural products 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000005720 sucrose Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 11
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract 2
- 239000010865 sewage Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 238000006396 nitration reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000684239 Canna x generalis Species 0.000 description 1
- 241000234653 Cyperus Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000143231 Scirpus validus Species 0.000 description 1
- 235000008573 Scirpus validus Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000001398 Typha domingensis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention discloses a carbon-oxygen combined regulatory denitrification system for horizontal underflow constructed wetlands. The denitrification system is provided with a treating pond, the top on the front end of the treating pond is provided with a water inlet pipe, the top on the tail end of the treating pond is provided with a discharge pipe, soil is filled in an inner cavity of the treating pond, and a plurality of aquatic plants are planted on the soil. The carbon-oxygen combined regulatory denitrification system is characterized in that at least three lines and three rows of carbon source throwing pipes are vertically inserted in the back half part in the soil, the front half part in the soil is divided into an upper layer, a middle layer and a lower layer, each layer is horizontally provided with at least three micropore aeration pipes which are arranged side by side at intervals, the front ends of all micropore aeration pipes are together connected with an air compressor on the ground surface by an air guide pipe, and the tail ends of all micropore aeration pipes are sealed. The denitrification system organically combines nitrification with denitrification so that the denitrification effect is greatly improved, and simultaneously solves the problems of nonuniform aeration, high energy consumption, easy blockage and the like existing in the traditional aeration pipes. The denitrification system is especially suitable for treating low-carbon and high-nitrogen waste water including the nitrogenous waste water and polluted lake water bodies and the like.
Description
(i). technical field: the invention belongs to environmental engineering technical field of sewage, more specifically relate to a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system, be applicable to the processing of " low-carbon high-nitrogen " sewage such as sanitary sewage, polluted surface water, eutrophication water, nitrogenous effluent.
(ii). background technology: nitrogen is one of principal pollutant index characterizing surface water quality situation is also to affect aquatic ecosystem health and stable important factor.At present, the many polluted water bodies of south China all exist COD compared with feature low and that the content of nitrogen and phosphorous is relatively high, and the ratio of its C:N:P, far below 100:5:1, is unfavorable for the removal of existing biological treatment system to nitrogen.
Artificial swamp is a kind of sewage treatment process growing up nineteen seventies, there is the advantages such as reduced investment, efficiency is high, environmental benefit is good, be widely used in the improvement of point-source pollution, Rural Plane Source Pollution and the municipal pollution water surroundings such as some industrial sewage, sanitary sewage, the chemical index such as TSS, COD have been had to comparatively desirable treatment effect.Yet, special sewage for this classes " low-carbon high-nitrogen " such as nitrogenous effluent, polluted lake water bodys, existing wet land system is unsatisfactory to the removal effect of nitrogen, still can not meet the water quality requirement of function of water body, improves wet land system very necessary to the removal efficiency of nitrogen.
Artificial swamp is that system comprises absorption, precipitation, the absorption of waterplant, the nitrification and denitrification effect of the volatilization of nitrogen and microorganism of matrix for the removal effect of nitrogen, and wherein the nitrification and denitrification effect of microorganism is the main path of wetland denitrogenation.Nitration reaction is by NH
4 +-N is converted into NO
3 -the process of-N, it is an oxidizing reaction, needs aerobic wetland soil envrionment conditions; And anti-nitration reaction is by NO
3 --N is converted into N
2process, it is a reduction reaction, needs the wetland soil envrionment conditions of anaerobism and sufficient carbon source.Because drowned flow artificial wet land is often in full water state, this restriction of self constructing causes the interior dissolved oxygen concentration of wetland on the low side, and nitration reaction is not thorough.Meanwhile, organism by a large amount of decomposition and inversion, causes denitrification stage carbon source not enough in the nitrated stage, the activity decreased of denitrifying bacterium, thus anti-nitration reaction is slowed down, nitric efficiency reduces greatly.Especially when processing " low-carbon high-nitrogen " special sewage, the denitrification effect of wetland is poorer.
For above problem, the measure of current drowned flow artificial wet land strengthened denitrification has: the one, by natural ventilation or artificial-strengthening ventilation, improve dissolved oxygen levels in wetland, and strengthen nitrification; The 2nd, in wetland, add carbon source promotion denitrification.These two kinds of enhancements have the following disadvantages:
1, wetland denitrogenation depends on nitrification and two reaction process of denitrification of microorganism; and above two kinds of enhancements isolate these two processes, do not organically combine, only improve nitrification or denitrification; although there is certain effect, nitric efficiency is limited;
2, the natural ventilation of wetland or artificial-strengthening ventilation are all the boring aeration pipes adopting at present, and existing aeration tube is mainly that the single PVC of employing moulds pipe or steel pipe is made, piercing aperture large (being generally 3-10mm) and distribute sparse on it, thereby cause aeration bubble large, aeration is inhomogeneous, energy consumption is high, and grit very easily enters in aeration tube while stopping aeration, the perforation on blocking aeration pipe.
(iii) summary of the invention: the object of the invention is to overcome the deficiency that above-mentioned denitrogenation measure exists, a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system is provided.
Specific design scheme of the present invention is: for existing horizontal drowned flow artificial wet land denitrification system, improve, it has treating pond, the front top for the treatment of pond is equipped with water inlet pipe, delivery pipe is equipped with at the tail end top for the treatment of pond, and at treating pond afterbody, dividing plate is housed, form drain chamber, the bottom of dividing plate is provided with relief hole drain chamber is communicated with treating pond inner chamber, in treating pond inner chamber, be filled with soil, on soil, plant and be implanted with some strain waterplant, it is characterized in that: in soil, by the latter half of at least 3 row 3 row carbon sources that are vertically fitted with for the treatment of pond, add pipe, in soil, lean on treating pond first half, in, lower three layers, every layer of horizontally disposed micropore aeration pipe that has at least 3 intervals to be arranged side by side respectively, the front end of all micropore aeration pipes collects the air compressor connecting on earth's surface by airway, the tail end sealing of all micropore aeration pipes.
Micropore aeration pipe described in the present invention is comprised of supporting tube and its outer silicon rubber aeration film of parcel, on described supporting tube outer wall, have at least four axial arranged air channels, the upper end that is positioned at supporting tube in every air channel has air inlet port, and aperture is 0.5-1.0mm; On silicon rubber aeration film, be densely covered with micropore, aperture is 0.03-0.08mm.
Carbon source described in the present invention adds and on pipe, has the uniform through hole of four rows of arranging vertically, the adjacent two exhausting holes layout that misplaces up and down, and in every row, the distance between through hole and through hole is 100-150mm, the aperture design of all through holes is 3-6mm.It is also feasible that certain through hole otherwise distributes, but carry out uniform with whole tube wall, is more rational.
Carbon source described in the present invention adds and in pipe, adds glucose, starch, sucrose, methyl alcohol, ethanol a kind of or arbitrary combination wherein.
Described in the present invention, water inlet pipe is arranged higher than soil surface; Described delivery pipe is arranged lower than soil surface.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1. utilization of the present invention strengthens nitrification at soil horizontal drowned flow artificial wet land front end aeration, and carbon source regulation and control in rear end promote denitrification, thereby have greatly improved wetland denitrification effect;
2. the micropore aeration pipe that the present invention adopts is that supporting tube adds silicone rubber membrane and makes, and is difficult for corrosion, long service life; Laser boring, micropore is evenly tiny, produces bubble little, and oxygen-transfer efficiency is high, compares with current other aerating apparatus, can greatly save power consumption; And micropore shrinks closedly while stopping aeration, is difficult for producing eyelet and stops up;
3. what the present invention controlled air compressor in using is 0.1～0.5 m than aeration speed
3/ (hm
2), stop exposing to the sun the time than being 15min:15min～60min:15min, can make carbon source add carbon source dosage in pipe is 1.0～2.5 g/m
3time, system nitric efficiency is the highest.
(iv). accompanying drawing explanation:
Fig. 1 is that system global structure master of the present invention looks (signal) figure;
The system global structure of the present invention of Fig. 2 is overlooked (signal) figure;
Micropore aeration pipe structural representation in the present invention of Fig. 3;
Fig. 4 is that in the present invention, carbon source adds tubular construction schematic diagram.
In figure: 1-air compressor, 2-water inlet pipe, 3-airway, 4-treating pond, 5-micropore aeration pipe, 6-soil, 7-waterplant, 8-carbon source adds pipe, 9-dividing plate, 10-drain chamber, 11-delivery pipe ，12— relief hole, 13-polypropylene supporting tube, 14-silicon rubber aeration film, 15-micropore, 16-air inlet port, 17-air channel, 18-through hole.
(v). embodiment:
Referring to Fig. 1, 2, the present invention has treating pond 4, the front top for the treatment of pond 4 is equipped with water inlet pipe 2, delivery pipe 11 is equipped with at the tail end top for the treatment of pond 4, and at treating pond 4 afterbodys, dividing plate 9 is housed, form drain chamber 10, the bottom of dividing plate 9 is provided with relief hole 12 drain chamber 10 is communicated with treating pond 4 inner chambers, in treating pond 4 inner chambers, be filled with soil 6, on soil 6, planting and be implanted with some strain waterplant 7(can be reed, Canna generalis Bailey, cattail, nutgrass flatsedge, Rush, Scirpus tabernaemontani etc.), it is characterized in that: in soil 6, by latter half of 3 row 3 row (can also be more more multiple row setting of the multirow) carbon sources that are vertically fitted with for the treatment of pond 4, add pipe 8, in soil 6, lean on treating pond 4 first halfs, in, lower three layers, every layer of horizontally disposed micropore aeration pipe 5 that has 3 (can be more) intervals to be arranged side by side respectively, the front end of all micropore aeration pipes 5 collects the air compressor 1 connecting on earth's surface by airway 3, the tail end sealing of all micropore aeration pipes 5.
Micropore aeration pipe described in the present embodiment 5 is comprised of polypropylene supporting tube 13 and its outer silicon rubber aeration film 14 of parcel, on described supporting tube 13 outer walls, have eight (having four at least) axial arranged air channels 17, the upper end that is positioned at supporting tube in every air channel has air inlet port 16, aperture is 0.5-1.0mm, concrete optional 0.8mm; On silicon rubber aeration film 14, be densely covered with micropore 15 (employing laser boring), aperture is 0.03-0.08mm, concrete optional 0.05mm.
Carbon source described in the present embodiment adds the uniform through hole 18 of four rows that has arrangement vertically on pipe 8, adjacent two exhausting holes 18 layout that misplaces up and down, and the distance up and down in every row between through hole and through hole is 100-150mm, concrete optional 120mm, the aperture design of all through holes 18 is 3-6mm, concrete optional 5mm.
Carbon source described in the present embodiment adds in pipe 8 and adds glucose, starch, sucrose, methyl alcohol, ethanol a kind of or arbitrary combination wherein.
Water inlet pipe described in the present embodiment 2 is arranged higher than soil 6 surfaces; Described delivery pipe 11 is arranged lower than soil 6 surfaces.
When the present invention specifically implements, in order to promote nitrification and denitrification simultaneously, improve wetland denitrification effect, air compressor 1 than aeration speed, be 0.1～0.5 m
3/ (hm
2), stop exposing to the sun the time than being 15min:15min～60min:15min, it is 1.0～2.5 g/m that carbon source adds carbon source dosage in pipe 5
3.
Working process of the present invention:
By water inlet pipe, to soil, adopt the mode of operation of intermittent water inflow, plug-flow water outlet, when sewage is when water inlet pipe enters wetland front end, start air compressor 1, the high-pressure air of its generation enters wetland inside through airway 3, micropore aeration pipe 5, thereby increased the dissolved oxygen in sewage, make wetland front end form aerobic environment condition, promoted the generation (NH of nitration reaction
4 +-N is converted into NO
3 --N); When this part contains a large amount of NO
3 -the sewage of-N, is added pipeline by carbon source and carries out carbon source regulation and control during to wetland rear end by horizontal plug-flow, supplements the required carbon source of denitrification, and wetland rear end is still in detesting anaerobic environment condition, thereby has promoted the carrying out (NO of anti-nitration reaction
3 --N is converted into N
2), finally realized the efficient removal to nitrogen.
In the above embodiment of the present invention, in soil, the upper, middle and lower of (L * B * H=1m * 0.5m * 0.4m) forebody arrange respectively 3 micropore aeration pipes that are connected in parallel, latter half of be arranged vertically 3 row 3 row totally 9 carbon sources add pipeline.Water inlet adopts artificial distribution, when hydraulic load is 0.4m
3/ (m
2d), COD, total nitrogen, ammonia nitrogen average are respectively 30mg/L, 28.4mg/L, 25.2 mg/L, air compressor than aeration speed, be 0.1～0.5 m
3/ (hm
2), stop exposing to the sun the time than being 15min:15min～60min:15min, it is 1.0～2.5 g/m that carbon source adds glucose dosage in pipe
3, the clearance of measurement result COD, total nitrogen, ammonia nitrogen is respectively 50.6%, 86.3%, 99.2%.Experimental result shows to have significantly improved wetland nitric efficiency by the method at the oxygenation of horizontal drowned flow artificial wet land front end, rear end supplementary carbon source.
Claims (5)
1. a horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system, there is treating pond, the front top for the treatment of pond is equipped with water inlet pipe, delivery pipe is equipped with at the tail end top for the treatment of pond, and at treating pond afterbody, dividing plate is housed, form drain chamber, the bottom of dividing plate is provided with relief hole drain chamber is communicated with treating pond inner chamber, in treating pond inner chamber, be filled with soil, on soil, plant and be implanted with some strain waterplant, it is characterized in that: in soil, by the latter half of at least 3 row 3 row carbon sources that are vertically fitted with for the treatment of pond, add pipe, in soil, lean on treating pond first half, in, lower three layers, every layer of horizontally disposed micropore aeration pipe that has at least 3 intervals to be arranged side by side respectively, the front end of all micropore aeration pipes collects the air compressor connecting on earth's surface by airway, the tail end sealing of all micropore aeration pipes.
2. a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system according to claim 1, it is characterized in that: described micropore aeration pipe is comprised of supporting tube and its outer silicon rubber aeration film of parcel, on described supporting tube outer wall, have at least four axial arranged air channels, the upper end that is positioned at supporting tube in every air channel has air inlet port, and aperture is 0.5-1.0mm; On silicon rubber aeration film, be densely covered with micropore, aperture is 0.03-0.08mm.
3. a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system according to claim 1, it is characterized in that: described carbon source adds the uniform through hole of four rows that has arrangement vertically on pipe, the adjacent two exhausting holes layout that misplaces up and down, and the distance in every row between through hole and through hole is 100-150mm, the aperture design of all through holes is 3-6mm.
4. a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system according to claim 1, is characterized in that: described carbon source adds and in pipe, adds glucose, starch, sucrose, methyl alcohol, ethanol a kind of or arbitrary combination wherein.
5. a kind of horizontal drowned flow artificial wet land carbon oxygen combined regulating denitrification system according to claim 1, is characterized in that: described water inlet pipe is arranged higher than soil surface; Described delivery pipe is arranged lower than soil surface.
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| BE1023113B1 (en) * | 2015-05-19 | 2016-11-23 | M.H.C. Nv | Installation for waste water treatment |
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| CN103253772B (en) * | 2013-05-23 | 2014-04-09 | 中国环境科学研究院 | Solid carbon source enhanced nitrogen removal system of horizontal subsurface flow constructed wetland |
| CN103936161B (en) * | 2014-04-25 | 2015-09-30 | 暨南大学 | A kind of plant carbon source strengthened artificial wet land that utilizes is to the method and system of low-carbon high-nitrogen sewage denitrogenation |
| CN105399208A (en) * | 2015-11-20 | 2016-03-16 | 云南大学 | Enhanced constructed wetland denitration system and method |
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| CN101423297B (en) * | 2008-11-24 | 2010-10-06 | 中国科学院水生生物研究所 | Composite vertical current artificial wetland oxygenation system |
| CN201334400Y (en) * | 2008-12-30 | 2009-10-28 | 中国科学院水生生物研究所 | Device for replenishing composite vertical current artificial marsh carbon source |
| CN101704585B (en) * | 2009-11-06 | 2011-07-27 | 山东大学 | Progressively reduced aeration subsurface constructed wetland |
| CN101973636A (en) * | 2010-09-26 | 2011-02-16 | 山东大学 | Distributed water inflow enhanced biological denitrification subsurface flow wetland |
| CN202717631U (en) * | 2012-04-27 | 2013-02-06 | 湖北理工学院 | Carbon-oxygen combined regulation and control denitrification system of horizontal subsurface-flow wetland |
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| BE1023113B1 (en) * | 2015-05-19 | 2016-11-23 | M.H.C. Nv | Installation for waste water treatment |
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