CN103449608B - Novel vertical flow automatic aeration annular artificial wetland system - Google Patents
Novel vertical flow automatic aeration annular artificial wetland system Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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Abstract
The invention discloses a novel vertical flow automatic aeration annular artificial wetland system which is characterized by comprising a diversion channel (1), an annular downstream pool (2), an annular upstream pool (3), a water collecting tank (4), a reflux pump (5) and a hollow circular flow jet device (7), wherein the diversion channel (1) is provided with a concave opening, two ends of the diversion channel (1) are respectively provided with a water inlet, and the inner side of the diversion channel (1) is 5-10cm lower than the outer side of the diversion channel (1); the annular downstream pool (2) is connected with the diversion channel (1), the bottom of the right of the annular downstream pool (2) is provided with an opening with the size of 20-30cm, the right wall of the annular downstream pool (2) is 10-20cm lower than the left wall of the annular downstream pool (2), and the annular downstream pool (2) is filled with oil sand and gravels and is additionally provided with plants; the annular upstream pool (3) is connected with the annular downstream pool (2), the right of the annular upstream pool (3) is 10-20cm lower than the left of the annular upstream pool (3), and the annular upstream pool (3) is filled with fine sand and shingles and is additionally provided with herbaceous plants; and the water collecting tank (4) is connected with the annular downstream pool (2), and sewage is reflowed by the reflux pump (5) and is jet to the diversion channel (1) through the hollow circular flow jet device (7).
Description
Technical field
The invention belongs to environmental engineering technical field of sewage, more specifically designed a kind of vertical current automatic oxygenation annular artificial wet land system, be applicable to sanitary sewage, polluted surface water, face source sewage.
Background technology
Artificial swamp is a kind of Novel waste water technology growing up the seventies and eighties in 20th century, due to the method, to have efficiency high, less investment, the features such as running expense is low, be widely used in oily(waste)water, sanitary sewage, the fields such as breeding wastewater processing and lake pollution control, but because water distribution is uneven, filler grating is unreasonable, limited and the influenced by ambient temperature reason such as large of plant transmission oxygen, cause artificial swamp to stop up, for hypoxgia, formed serious reducing environment, also limited the nitrification of microorganism simultaneously, exist the problem that nitric efficiency is low always.Therefore, improve the denitrification effect of wetland, key is to improve water distribution and the oxygen environment of wetland, thereby improves nitrification effect.
At present, artificial swamp mainly contains 3 kinds of forms: surface stream, underground undercurrent, vertical current.Surface stream wetland and natural wetland are very similar, and the impact of operating performance climate is larger, and also can grow a large amount of mosquitos and flies summer, and environmental health condition is poor; Although underground current wetland has the features such as good heat insulating, the impact for the treatment of effect climate is little, sanitary condition is better, due to the oxygen therapy effect of this technology utilization root system of plant, therefore vegetation to be had relatively high expectations, and control relative complex, denitrification effect is not good enough.The sewage of vertical-flow wetland flows to bed of packings bottom from wetland surface longitudinal, and bed body is in undersaturated condition, and oxygen can transmit the wet land system into people by atmospheric diffusion and plant.The nitrification ability of vertical-flow wetland descends current wetland above Ground, and in this technique, the action of gravity of water reuse water flows downward, and high insulating effect, the impact high, treatment effect climate of loading are little, adopts in the world more also this technique just at present.But the removal of nitrogen is the limiting factor of drowned flow artificial wet land usefulness always, especially in the winter time.General TN clearance is below 40%, NH
3 -clearance is below 45%.
Vertical current constructed wetland treatment system comprises the volatilization of absorption, filtration, precipitation and the ammonia of matrix to the removal effect of nitrogen, in the absorption of plant and wetland, under microbial process, through nitrated, denitrification, remove.Nitrated, the denitrification of microorganism play an important role in the removal of nitrogen, and its primary condition is to have a large amount of nitrification and denitrification bacteriums and suitable wetland soil envrionment conditions, need existence and the necessary aerobic environment of nitrifying bacteria community in nitrifying process.But because undercurrent type wetland inside, particularly bulk soil are often in anaerobic state, thereby the growth of nitrifier and the generation of nitration reaction have been limited.
The oxygenation way of current artificial swamp has: the one, perforate ventpipe is installed in wet land system, and carry out natural ventilation; The 2nd, with air compressor, continuously or intermittently to the tube having holes in wet land system, strengthen ventilation; The 3rd, utilize wind energy to pass into air to the tube having holes in wet land system.These three kinds of oxygenation ways have following deficiency:
1, ventpipe is air gravity flow ventilation, and transfer of air efficiency is not high; And the laying of multilayer ventilating pipe, has increased the initial cost of wet land system.
2, wind energy oxygen increasing mode is subject to the restriction of region and weather very large, causes wet land system treatment effect unstable.
3, three kinds of oxygenation ways are not all created aerobic, the envrionment conditions that anaerobism alternately changes of nitrated, the required optimum of anti-nitration reaction, cause NO in wetland effluent
3 -concentration increase, the clearance of nitrogen declines.
4, three kinds of oxygenation ways are all directly perforate ventpipe to be embedded in the matrix of wet land system, and tiny grit very easily stops up the perforate of ventpipe.
5, the present invention can effectively improve the water treatment efficiency of artificial swamp, significantly reduces the construction rate of unit water treatment wetland.
Summary of the invention
The present invention is in order to make up the existing weak point of above-mentioned prior art, a kind of vertical-flow wetland water distribution uniformity and aeration system are provided, this system utilizes annular flow artificial swamp extend sewage duration of contact and automatic oxygenation system is set, create aerobic, the anaerobism that microorganism is nitrated, anti-nitration reaction is required and replaced the envrionment conditions changing, greatly improved denitrification effect.
Technical scheme of the present invention is:
Feature of the present invention is: waste water utilizes water natural flow water distribution to set gradually through splitter box: downstream Structure and up stream Structure, through ejector automatic oxygenation, be back to skin again, constructional feature of the present invention is that downstream annular pool and up stream annular pool all adopt circular circulating device, centre is provided with partition wall, downstream annular pool is filled fine sand and gravel, and with vegetation, up stream annular pool is filled fine sand and pebbles, and with herbaceous plant, downstream annular pool hypothallus is than up stream annular pool matrix floor height 10～20cm.
Feature of the present invention is also that water collecting basin is connected with automatic oxygenation ejector, and water outlet and splitter box on ejector are at 45 °.
A new vertical stream automatic oxygenation annular artificial wet land system, is:
Splitter box, downstream annular pool and up stream annular pool that water distribution is set form artificial wet land system, and water collecting basin and reflux pump and hollow circulation ejector form sewage collecting and secondary circulation treating processes; The downstream annular pool being communicated with in bottom and up stream annular pool and water collecting basin form vertical current constructed wetland, and the bottom of downstream annular pool is communicated with up stream annular pool, and hollow circulation ejector is set above water collecting basin, and is connected with return line.
Downstream annular pool and up stream annular pool all have hypothallus; Described hollow circulation ejector comprises: nozzle, inlet pipe, mixing section, trunnion, diffuser tube and tail pipe; Hollow circulation ejector working process is: sewage converges by nozzle and inlet pipe, and the recoil effect that passes into air-flow through inlet pipe overflows to mixing section and then through trunnion, imports to diffuser tube and finally by tail pipe, exported, and completes oxygenation process.
Further, the described splitter box that water distribution is set, downstream annular pool and up stream annular pool all adopt circular circulating device, centre is provided with partition wall, downstream annular pool hypothallus is filled fine sand and gravel, and with vegetation, up stream annular pool hypothallus is filled fine sand and pebbles, and with herbaceous plant, downstream annular pool hypothallus is than up stream annular pool matrix floor height 20～30cm.
Further, described sewage collecting is to be uniformly distributed and to be entered Vertical Flow Constructed Wetland Systems by splitter box, by water collecting basin partial reflux, be connected with automatic oxygenation ejector, complete the process that effluent cycle oxygenation is processed, water outlet and splitter box on ejector are at 45 °.
Further, described downstream annular pool hypothallus comprises surface soil layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described pedosphere is mollic, supports Limnodrilus hoffmeisteri in soil, puts 3-8 seedling in a suitable place to breed for every square metre, preferably 6.
Further, described downstream annular pool hypothallus comprises Biomedia packing layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described Biomedia packing layer is sawdust fillers layer, straw packing layer or palm silk packing layer.
Further, the pond bottom sloping of described downstream annular pool and up stream annular pool is 2-5 °.
Further, one deck beds and catalyst reaction section are set on the hypothallus of described up stream annular pool, the height of described beds height from top to bottom reduces by half successively, under upper, be that gac is uploaded ruthenium beaded catalyst, ceramic honeycomb catalyst and hydroxyl oxidize iron catalyst successively, controlling the residence time of water in catalyst bed is 10～25min, the hydraulic load 2～6m of beds
3/ m
2h.
Further, one deck is set on the hypothallus of described up stream annular pool and there is adsorbing carrier layer, it is described that to have adsorbing carrier layer be nano carbon microsphere, described nano carbon microsphere is attached with hydroxyl oxidize iron catalyst, described hydroxyl oxidize iron catalyst is carrier model hydrous iron oxide, its preparation process is as follows, the dilute hydrochloric acid of carrier being put into pH=1～2 soaks 10 hours, rinse the carrier after soaking, and then put into iron nitrate solution and soak 18 hours, add wherein sodium hydroxide solution, iron ion is precipitated completely, generate brown precipitate thing, described brown precipitate thing is following dry at 300 ℃, obtain yellow carrier hydroxyl oxidize iron powder, it is carrier model hydrous iron oxide.When the dilute hydrochloric acid that carrier is put into pH=1～2 soaks 10 hours, preferred pH=1.5.
Further, the preparation method of described nano carbon microsphere is, employing liquefied petroleum gas (LPG) is raw material, hydrogen is carrier, by liquefied petroleum gas (LPG), hydrogen is input in gas-holder in the ratio of 1: 4, control mixture temperature 30-35 ℃ in gas-holder, pressure 0.3-0.32Pa, arc plasma generator inner bag is vacuumized, described vacuum tightness is less than 0.0001Pa, gas mixture is passed into, control arc plasma generator inner bag mixture pressure to 0.22-0.28Pa, control the sparking voltage 380-420kv of arc plasma generator, 1 time/min of discharge frequency, discharge time 30-35min, at arc plasma generator inner bag, generate nano carbon microsphere, the carbon ball of gained is flaky graphite structure, nano carbon microsphere sphere diameter 10～20nm, specific surface area is greater than 380m
2/ g.
Further, the horizontal floor space of described new vertical stream automatic oxygenation annular artificial wet land system is 400～780m
2.
Beneficial effect
Compare with existing technology, beneficial effect of the present invention is embodied in:
1, the present invention adopts circulation artificial wet land system, can it be refluxed and oxygenation processing for the water quality characteristic of difference water inlet and different steps sewage, has reached the emission standard of sewage completely.
2, the present invention is refluxed and is processed and can artificially effectively control the removal effect of dirty water pollutant again by ejector automatic oxygenation device, and effectively controls the decontamination effect improving of sewage.
3, the present invention can collect water reuse in water outlet conduct, has effectively saved resource.
4, carrier layer of the present invention, can adsorb a large amount of pollutents, after periodic cleaning, can purify water, and protection of the environment.
5, the present invention can effectively improve the water treatment efficiency of artificial swamp, significantly reduces the construction rate of unit water treatment wetland.
Accompanying drawing explanation
Fig. 1 is this new vertical stream automatic oxygenation artificial wet land system vertical view.
Fig. 2 is this new vertical stream automatic oxygenation artificial wet land system process flow sheet.
Fig. 3 is hollow circulation ejector structural representation.
In figure, Reference numeral is as follows:
1-splitter box; 2-downstream annular pool; 3-up stream annular pool; 4-water collecting basin; 5-reflux pump; 6-return line; 7-hollow circulation ejector; 8-nozzle; 9-inlet pipe; 10-mixing section; 11-trunnion; 12-diffuser tube; 13-tail pipe.
Embodiment
Implement place, suburb, Hefei ,Anhui, in November, 2012 enforcement time, floor space 5m
2, day designing treatment water yield 2～2.5m
3/ d.Concrete operations are as follows:
As shown in Figure 1, a kind of new vertical stream automatic oxygenation annular artificial wet land system, be: splitter box 1, downstream annular pool 2 and up stream annular pool 3 that water distribution is set form artificial wet land system, and water collecting basin 4 and reflux pump 5 and hollow circulation ejector 7 form sewage collecting and secondary circulation treating processes; The downstream annular pool 2 being communicated with in bottom and up stream annular pool 3 and water collecting basin 4 form vertical current constructed wetland, and the bottom of downstream annular pool 2 is communicated with up stream annular pool 3, and hollow circulation ejector 7 is set above water collecting basin, and is connected with return line 6.
Downstream annular pool 2 and up stream annular pool 3 all have hypothallus; Described hollow circulation ejector 7 comprises: nozzle 8, inlet pipe 9, mixing section 10, trunnion 11, diffuser tube 12 and tail pipe 13; Hollow circulation ejector 7 working process are: sewage converges by nozzle 8 and inlet pipe 9, and the recoil effect that passes into air-flow through inlet pipe 9 overflows to mixing section 10 and then through trunnion, imports to diffuser tube 12 and finally by tail pipe 13, exported, and completes oxygenation process.
Further, the described splitter box 1 that water distribution is set, downstream annular pool 2 and up stream annular pool 3 all adopt circular circulating device, centre is provided with partition wall, and downstream annular pool 2 hypothalluses are filled fine sand and gravel, and with vegetation, up stream annular pool 3 hypothalluses are filled fine sand and pebbles, and with herbaceous plant, downstream annular pool 2 hypothalluses are than up stream annular pool 3 matrix floor height 20～30cm, the filling proportion of described fine sand and pebbles is 1: 2.5.
Further, described sewage collecting is to be uniformly distributed and to be entered Vertical Flow Constructed Wetland Systems by splitter box, by water collecting basin partial reflux, be connected with automatic oxygenation ejector, complete the process that effluent cycle oxygenation is processed, water outlet and splitter box on ejector are at 45 °.
Further, described downstream annular pool 2 hypothalluses comprise surface soil layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described pedosphere is mollic, supports Limnodrilus hoffmeisteri in soil, puts 3-8 seedling in a suitable place to breed for every square metre.
Further, described downstream annular pool 2 hypothalluses comprise Biomedia packing layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described Biomedia packing layer is sawdust fillers layer, straw packing layer or palm silk packing layer.
Further, the pond bottom sloping of described downstream annular pool and up stream annular pool is 2-5 °.
Further, one deck beds and catalyst reaction section are set on the hypothallus of described up stream annular pool 3, the height of described beds height from top to bottom reduces by half successively, under upper, be that gac is uploaded ruthenium beaded catalyst, ceramic honeycomb catalyst and hydroxyl oxidize iron catalyst successively, controlling the residence time of water in catalyst bed is 10～25min, the hydraulic load 2～6m of beds
3/ m
2h.
Further, one deck is set on the hypothallus of described up stream annular pool 3 and there is adsorbing carrier layer, it is described that to have adsorbing carrier layer be nano carbon microsphere, described nano carbon microsphere is attached with hydroxyl oxidize iron catalyst, described hydroxyl oxidize iron catalyst is carrier model hydrous iron oxide, its preparation process is as follows, the dilute hydrochloric acid of carrier being put into pH=1～2 soaks 10 hours, rinse the carrier after soaking, and then put into iron nitrate solution and soak 18 hours, add wherein sodium hydroxide solution, iron ion is precipitated completely, generate brown precipitate thing, described brown precipitate thing is following dry at 300 ℃, obtain yellow carrier hydroxyl oxidize iron powder, it is carrier model hydrous iron oxide.
Further, the preparation method of described nano carbon microsphere is, employing liquefied petroleum gas (LPG) is raw material, hydrogen is carrier, by liquefied petroleum gas (LPG), hydrogen is input in gas-holder in the ratio of 1: 4, control mixture temperature 30-35 ℃ in gas-holder, pressure 0.3-0.32Pa, arc plasma generator inner bag is vacuumized, described vacuum tightness is less than 0.0001Pa, gas mixture is passed into, control arc plasma generator inner bag mixture pressure to 0.22-0.28Pa, control the sparking voltage 380-420kv of arc plasma generator, 1 time/min of discharge frequency, discharge time 30-35min, at arc plasma generator inner bag, generate nano carbon microsphere, the carbon ball of gained is flaky graphite structure, nano carbon microsphere sphere diameter 10～20nm, specific surface area is greater than 380m
2/ g.
Further, the ton wastewater treatment floor space of described new vertical stream automatic oxygenation annular artificial wet land system is 0.1-2m2.The present invention can effectively improve the tax processing efficiency of artificial swamp, significantly reduces the construction rate of unit water treatment wetland.To adopting water source after above-mentioned wetland is processed to carry out nitrogen and phosphorus content, detect; the detection method of the Water phosphorus content of regulation in the < < water that employing State Environmental Protection Administration writes and effluent monitoring analytical procedure > > (the 4th edition); water source before and after this wet land system is processed carries out nitrogen and phosphorus content detection, and detected result is in Table 1.Detected result shows: this wet land system has the treatment effect of highly significant to the ammonia nitrogen in water body and total phosphorus:
Table 1
Specific works process:
New vertical stream automatic oxygenation artificial wet land system can adopt continuously or the mode of operation of intermittent water inflow, automatic outletting, when entering splitter box (1) through water inlet pipe, sewage flows into downstream annular pool (2), in sewage infitration process, formed a belt strip that is transitioned into gradually anaerobic environment by aerobic environment, under this envrionment conditions, for providing, microorganism carries out the required reaction conditions of nitrification and denitrification, make the itrogenous organic substance in waste water be converted into nitric nitrogen, therefore, remainder contains NO
3the sewage of-N is by plug-flow during to up stream annular pool (3), because downstream annular pool (2) makes microorganism can fully carry out anti-digestive process to the overlength flowing time of up stream annular pool (3), and then promoted the generation NO of anti-nitration reaction
3-N is converted into N
2, aerobic-anaerobic-anaerobic-anoxic-oxic circulation envrionment conditions of vertical current constructed wetland, has further promoted the thorough removal to nitrogen., because vertical-flow wetland system also can be processed for the higher concentration waste water automatic oxygenation that refluxes, so this device is as Multi-functional effluent treatment unit, can under a plurality of fields and condition, effectively use simultaneously.
The numerical range relating in the embodiment of being described herein is all through many experiments gained, and each point can be realized, and is not confined to end points or terminal, and length is limit, and at this, does not enumerate.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. new vertical flows an automatic oxygenation annular artificial wet land system, it is characterized in that:
Splitter box (1), downstream annular pool (2) and up stream annular pool (3) that water distribution is set form artificial wet land system, and water collecting basin (4) and reflux pump (5) and hollow circulation ejector (7) form sewage collecting and secondary circulation treating processes; The downstream annular pool (2) being communicated with in bottom and up stream annular pool (3) and water collecting basin (4) form vertical current constructed wetland, the bottom of downstream annular pool (2) is communicated with up stream annular pool (3), hollow circulation ejector (7) is set above water collecting basin, and is connected with return line (6);
Downstream annular pool (2) and up stream annular pool (3) all have hypothallus; Described hollow circulation ejector (7) comprising: nozzle (8), inlet pipe (9), mixing section (10), trunnion (11), diffuser tube (12) and tail pipe (13); Hollow circulation ejector (7) working process is: sewage converges by nozzle (8) and inlet pipe (9), the recoil effect that passes into air-flow through inlet pipe (9) overflows to mixing section (10) and then through trunnion, imports to diffuser tube (12) finally by tail pipe (13) output, completes oxygenation process;
On the hypothallus of described up stream annular pool (3), one deck is set and there is adsorbing carrier layer, it is described that to have adsorbing carrier layer be nano carbon microsphere, described nano carbon microsphere is attached with hydroxyl oxidize iron catalyst, described hydroxyl oxidize iron catalyst is carrier model hydrous iron oxide, its preparation process is as follows, the dilute hydrochloric acid of carrier being put into pH=1～2 soaks 10 hours, rinse the carrier after soaking, and then put into iron nitrate solution and soak 18 hours, add wherein sodium hydroxide solution, iron ion is precipitated completely, generate brown precipitate thing, described brown precipitate thing is following dry at 300 ℃, obtain yellow carrier hydroxyl oxidize iron powder, it is carrier model hydrous iron oxide, the preparation method of described nano carbon microsphere is, employing liquefied petroleum gas (LPG) is raw material, hydrogen is carrier, by liquefied petroleum gas (LPG), hydrogen is input in gas-holder in the ratio of 1: 4, control mixture temperature 30-35 ℃ in gas-holder, pressure 0.3-0.32Pa, arc plasma generator inner bag is vacuumized, vacuum tightness is less than 0.0001Pa, gas mixture is passed into, control arc plasma generator inner bag mixture pressure to 0.22-0.28Pa, control the sparking voltage 380-420kv of arc plasma generator, 1 time/min of discharge frequency, discharge time 30-35min, at arc plasma generator inner bag, generate nano carbon microsphere, the carbon ball of gained is flaky graphite structure, nano carbon microsphere sphere diameter 10～20nm, specific surface area is greater than 380m
2/ g.
2. a kind of new vertical according to claim 1 flows automatic oxygenation annular artificial wet land system, it is characterized in that: described sewage collecting is to be uniformly distributed and to be entered Vertical Flow Constructed Wetland Systems by splitter box, by water collecting basin partial reflux, be connected with hollow circulation ejector again, complete the process that effluent cycle oxygenation is processed, water outlet and splitter box on ejector are at 45 °.
3. a kind of new vertical stream automatic oxygenation annular artificial wet land system according to claim 1, is characterized in that: described downstream annular pool (2) hypothallus comprises surface soil layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described pedosphere is mollic, supports Limnodrilus hoffmeisteri in soil, puts 3-8 seedling in a suitable place to breed for every square metre.
4. a kind of new vertical stream automatic oxygenation annular artificial wet land system according to claim 1, is characterized in that: described downstream annular pool (2) hypothallus comprises Biomedia packing layer, layer of sand and gravel bed from top to bottom successively; Described gravel bed is Calcium of intensifiens gravel bed; Described Biomedia packing layer is sawdust fillers layer, straw packing layer or palm silk packing layer.
5. a kind of new vertical according to claim 1 flows automatic oxygenation annular artificial wet land system, it is characterized in that: on the hypothallus of described up stream annular pool (3), one deck beds and catalyst reaction section are set, the height of described beds height from top to bottom reduces by half successively, under upper, be that gac is uploaded ruthenium beaded catalyst, ceramic honeycomb catalyst and hydroxyl oxidize iron catalyst successively, controlling the residence time of water in catalyst bed is 10～25min, the hydraulic load 2～6m of beds
3/ m
2h.
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| CN102218319B (en) * | 2011-04-08 | 2013-07-10 | 大连理工大学 | Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system |
| CN102580743B (en) * | 2011-12-30 | 2013-09-25 | 浙江大学 | Method for preparing oxidation catalyst from gold ore tailing slag, and prepared oxidation catalyst and application thereof |
| CN103204588B (en) * | 2012-01-16 | 2014-05-28 | 辽宁省环境科学研究院 | Vertical undercurrent artificial wetland system capable of reinforcing removal of total nitrogen without obstruction |
| CN203382571U (en) * | 2013-07-19 | 2014-01-08 | 合肥工业大学 | Novel vertical current automatic oxygen-charging annular artificial wetland system |
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2013
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