CN104787884A - Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor - Google Patents
Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor Download PDFInfo
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- CN104787884A CN104787884A CN201410033376.2A CN201410033376A CN104787884A CN 104787884 A CN104787884 A CN 104787884A CN 201410033376 A CN201410033376 A CN 201410033376A CN 104787884 A CN104787884 A CN 104787884A
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Abstract
The invention provides a method and system for nitrogen and phosphorus removal via a WTRs-reinforced tidal-flow reactor, which belongs to the field of water treatment. According to the invention, WTRs is used as matrix, and a tidal-flow reactor is filled with WTRs; deposit is added to realize microbial inoculation of the tidal-flow reactor; and then synthesized waste water with high nitrogen-phosphorus content is added into the tidal-flow reactor, and treatment is carried out. The objective of the invention is to simulate eutrophicated river water and to simultaneously and highly-effectively eliminate nitrogen pollution and phosphorus pollution in the eutrophicated river water. The method and system are characterized in that all the matrix in the tidal-flow reactor is air-dried WTRs with a size of 1 to 3 cm, nitrogen in the tidal-flow reactor is removed mainly through microbial action, and phosphorus pollutants are removed mainly through physical and chemical absorption. According to the invention, the system has a simple structure and is easy to use; materials used in the invention have low cost and are environment-friendly; the method is simple to operate; and while WTRs are recycled, nitrogen and phosphorus pollutants in an eutrophicated water body are removed in virtue of the tidal-flow reactor, so the win-win objectives of waste recycling and ecological restoration are achieved.
Description
Technical field
The invention belongs to water treatment field, or environmental engineering.Be specially a kind of method and system utilizing water purification plant's waste sludge strengthening tide current reactor denitrogenation dephosphorizing.
Background technology
Along with urbanization is fast-developing and all kinds of sewage drainage amount continues to increase, a large amount of sanitary sewage and factory effluent have been accepted in river.Constantly increase at the excessive and various emission factor of China's urban density of population, the pollution of urban river is on the rise, and the pressure of river improvement continues to increase.With North China, the heavily contaminated river of main body that to be all typical productive life waste water and B-grade sewage treatment plant tail water be in most river.The clearance of conventional B-grade sewage treatment plant to the nutrient salts such as nitrogen, phosphorus is about 50% and 40%, and tail water nitrogen and phosphorus content is after treatment still general higher, causes nutrient concentration in River pollution to exceed standard.Wherein, the Main Morphology that ammonia nitrogen exists as nitrogen is one of major incentive causing river eutrophication.River has natural self-purification function, under its essence refers to natural condition, decomposes each pollutant by approach such as bio-oxidation, photoxidation decomposition and plant absorption decomposition.But a large amount of ammonia nitrogen existed obviously can reduce dissolved oxygen in water body in polluted river, cause anaerobic condition abundant, optimum self-purification function disappears or is badly damaged.And so forth, ammonia nitrogen exceeds standard, river anoxic, forms vicious cycle, day by day increases the weight of the destruction of hydrobiological harm and river ecosystem.Therefore, for realizing the protection of water resources further and promoting the Sustainable development of ecotope, develop easy, low consumption, efficiently water pollutions treatment technology and seem particularly urgent and most important.
Artificial swamp is the important sewage purification technology grown up last century, is widely used in sanitary sewage disposal because it has the feature such as effective, energy consumption is low and pollutes in the restoration of the ecosystem of natural water (as river, lake, estuarine wetland etc.).Tidal flow artificial wetland is a kind of novel artificial wetland that development in recent years is got up, and have laboratory experiment to show, in tidal flow artificial wetland, nitrogen removal rate is 85%, and maximum nitrogen load reaches 28gN m
-2day
-1.Tidal flow artificial wetland, by arranging different reactions and idle mixing time, enters row Mao oxygen and reoxygenation with making wetland intercycle property, and constantly forms aerobic anaerobic process.This periodic change can produce powerful matrix pores suction, significantly enhances transfer rate and the consumption of oxygen, and then improves artificial swamp internal contamination thing removal efficiency.Investigator is had to propose the combined system of tide current and other types artificial swamp, as: Application Number (patent) CN201010565595.7 discloses the method and system that a kind of tide current and horizontal drowned flow combination type wetland dispose of sewage, and Application Number (patent) 201210487252.2 publication No. CN102923860A discloses method and the system thereof of tide current-horizontal drowned flow hybrid constructed wetland strengthened denitrification, all realize aerobic nitrification effect in tidal flow artificial wetland, denitrification is realized in horizontal drowned flow artificial wet land, in two systems, realize aerobic and anaerobic environment respectively and then reach the object that nitrogen pollutant removes.Similar, as Application Number (patent) 200910040219.3 publication number CN101575157A discloses method and treatment system thereof that a compound tidal flow artificial wetland disposes of sewage.Be characterized in that arranging two tidal flow artificial wetlands connects, and secondary tidal flow artificial wetland not run duration reach anaerobic environment.Part investigator it is also proposed more complicated group. mould assembly tidal flow artificial wetland, and as Application Number (patent) 200910093528.7 publication number CN101671092A discloses a kind of combined tidal flow artificial wetland Sewage treatment systems and method.Adopt in system the method for siphon to achieve waterflooding absorption and two stages of emptying reoxygenation preferably, but system is bottom-up comprises layer of displacement, denitrification strengthening layer, strengthening reoxygenation layer and aerobic ecological layer of sand, constructs slightly aobvious complexity.Similar strengthens tidal flow artificial wetland sewage water treatment method and system as Application Number (patent) 201210487252.2 publication No. CN102923860A discloses cluster, content comprises the cluster be made up of multiple individual small tidal flow artificial wetland and strengthens aerobic wetland bed body and be placed in the wetland bed body of its lower floor's supplementary carbon source type anaerobism, structure is slightly aobvious complicated, and running maintenance is difficult.In addition, the electrochemical method of auxiliary use realizes denitrogenation dephosphorizing better to have investigator to consider, but running cost is relatively high, as Application Number (patent) 201210519479.0 publication No. CN102942293A discloses a kind of method and system of tide current wetland coupling electrochemical intensified denitrification and dephosphorization.Graphite electrode plate and metal polar plate being set in anaerobism bed electrolysis, by starting direct supply and timing exchange direct supply positive and negative electrode, realizing nitrate electrolytic reduction and phosphoric acid salt flocculation sediment.Part investigator is also had to propose the importance that in artificial swamp, matrix is selected, as Application Number (patent) 200910191513.4 publication No. CN101700945A discloses a kind of Preposed acidification-tide flow polymorphic marsh group Sewage treatment systems and method.Matrix in the body of pond is the single of rubble, cinder and slag or multiple combinations.Application Number (patent) 201010225270.4 publication No. CN101891304A discloses tidal flow constructed wetland with rich reoxygenation, and matrix is one or more in fine sand, coarse sand, gravel, cobble, rubble, zeolite, haydite, galleting, lime-ash, blast furnace slag, slag.
WTRs, as safe waste a kind of in water treatment plant, contains abundant Fe/A1.These Fe/A1 mainly exist with amorphous state at WTRs, and make it have larger specific surface area, and have good adsorptive power to various material.Moreover, WTRs all has good crystallized ability to P active in settling and metal.The denitrogenation of microorganism is in the restraining effect being subject to phosphoric acid salt, heavy metal and hydrogen sulfide in varying degrees, and Fe (III) is within the scope of finite concentration, can strengthen part microorganism active, as aerobic nitrification effect and Anammox effect.Therefore, comprehensive above factor, mixes WTRs with settling and is applied in tidal flow artificial wetland, to contribute to building aerobic and anaerobic environment, and improve the habitat of nitrogen functional flora, eliminate its retardation of growth, strengthen microorganism active, and then the Nitrogen/Phosphorus Removal of strengthening tidal flow artificial wetland.
Summary of the invention
The invention provides a kind of with the method and system of water purification plant's waste sludge (WTRs) for Nitrogen/Phosphorus Removal in matrix strengthening tide current reactor, overcome the problem that removal efficiency of nitrogen and phosphorus in existing tide current reactor sewage water treatment method is not high.
The present invention is that matrix is packed in tide current reactor with WTRs, adds settling and carries out microbial inoculant to tide current reactor, and then, the synthetic wastewater adding nitrogen and phosphorus content abundant in tide current reactor processes.Object is simulation sludge with high silver, is efficiently removed wherein nitrogen and phosphorus pollution by tide current reactor simultaneously.
The present invention is realized by following technical measures:
First, fresh WTRs is made the ball of 1-3cm, and naturally dry, take the WTRs of a certain amount of preparation, be filled in tide current reactor, add a certain proportion of settling afterwards in tide current reactor.Control intake pump working time by motorized valve, in bottom-up mode, in system, supply synthetic wastewater is to the specific water surface, under this anoxic condition, carry out microorganism denitrification, and WTRs realizes the Adsorption to phosphorus simultaneously.Control wet-pit by motorized valve, drain sewage fast, realize the reoxygenation of intrasystem matrix mummification and microorganism, and realize nitrification in this case.Whole process has been controlled by time controller.
The above-mentioned method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal, it is characterized in that: in tide current reactor, matrix is all the WTRs of the 1-3cm after drying, shape is not limit, cube, circle and irregularly shapedly all can reach ideal effect, especially be good with circle, only lay cobble and the quartz sand of different-grain diameter at system bottom.
The above-mentioned method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal, it is characterized in that: in tide current reactor, water-in is higher than reaction liquid level, reaction liquid level shows higher than matrix, and hydraulic load is 0.2-0.3m
3m
-2day
-1.
The above-mentioned method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal, is characterized in that: tide current reactor operation scheme is " water inlet-reaction-draining-oxygen enrichment ".For realizing aerobic-anaerobic environment alternately, system adopts the operation scheme of 1 every day in cycle, and the concrete time is: water inlet 4min, reaction 21h53min, emptying 3min, mummification 2h.
The above-mentioned method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal, it is characterized in that: in tide current reactor, nitrogen is removed based on microbial process, nitration reaction occurs in step of reaction initial stage and mummification stage, and anti-nitration reaction mainly occurs in the step of reaction middle and later periods; The removal of phosphor contaminant is based on physical and chemical adsorption, and the Adsorption of phosphorus occurs in between water and drainage period.
Advantage of the present invention and beneficial effect are embodied in:
1) raw material of the present invention is water purification plant's waste sludge, belongs to the safe disposal thing of water purification plant, has the advantage easily obtained;
2) Operation system setting of the present invention is simple and easy, and operating process is simple, is beneficial to the practical application of sewage treatment project;
3) the present invention utilizes the own characteristic of water purification plant's waste sludge, improves bacterium habitat, enhances microbial process in settling;
4) the present invention utilizes water purification plant's waste sludge, is conducive to the doulbe-sides' victory effect realizing " treatment of wastes with processes of wastes against one another ".
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part.Schematic description and description of the present invention, for explaining the present invention, is not formed improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the system construction drawing utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal of the present invention.
1-sewage collecting box, 2-intake pump, 3-time controller, 4-water-in, 5-WTRs matrix, 6-bottom cobble and quartz sand, 7-water port, 8-wet-pit.
Fig. 2 is the total nitrogen removal effect figure in the embodiment of the present invention.
Fig. 3 is the total phosphorus removal effect figure in the embodiment of the present invention.
Fig. 4 is the activity change of the denitrifying bacterium in the embodiment of the present invention.
Fig. 5 is the Plantago fengdouensis of the aerobic ammonia oxidation bacterium in the embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Example one: with the waste sludge of water purification plant of Beijing (WTRs) for raw material, in this waste sludge, the content of iron and aluminium is respectively 150 and 100mgg
-1.Water purification plant's waste sludge makes 1-3cm ball, and naturally dries.Tide current reactor is the Plexiglas cylinder of internal diameter 10cm, high 100cm, and the high cobble (6-10mm) of 10cm and the high quartz sand (2-6mm) of 5cm are laid in bottom, by paramount for the WTRs of the about 1.7kg of preparation filling be 75cm place.Get North China eutrophic lake settling 1kg, add in tide current reactor.In addition, in second pillar, enrichment is carried out to the settling not adding WTRs, and with this as control group.The cycle of operation is 1day, water inlet 4min, reaction 21h53min, emptying 3min, idle 2h.Day output is 2.5L.Water inlet PO
4 3+, NO
2 -and NO
3 -mean concns is respectively 3.5mg/L, 10mg/L and 5mg/L, NH
4 +be progressively be increased to 30mg/L by 10mg/L, 20mg/L, within every 3 days, measure PO in water outlet
4 3+, NH
4 +, NO
2 -and NO
3 -concentration.Through the operation of 212d, tide current reactor pollutent average removal rate is NH
4 +78.95%, PO
4 3+95.89%, TN81.83%.
Example two: same with the waste sludge of water purification plant of Beijing (WTRs) for raw material.Tide current reactor is the Plexiglas cylinder of internal diameter 10cm, high 100cm, and the high cobble (6-10mm) of 10cm and the high quartz sand (2-6mm) of 5cm are laid in bottom, by paramount for the WTRs of the about 1.7kg of preparation filling be 75cm place.Get North China high ammonia and nitrogen pollution fluvial deposit 800g, add in tide current reactor.In addition, in second pillar, enrichment is carried out to the settling not adding WTRs, and with this as control group.The cycle of operation is 1day, water inlet 4min, reaction 21h53min, emptying 3min, idle 2h.Day output is 2.5L.Water inlet PO
4 3+, NH
4 +, NO
2 -and NO
3 -mean concns is respectively 3.5mg/L, 10mg/L, 10mg/L and 5mg/L, within every 3 days, measures PO in water outlet
4 3+, NH
4 +, NO
2 -and NO
3 -concentration.Through the operation of 212d, tide current reactor pollutent average removal rate is NH
4 +77.32%, PO
4 3+98.94%, TN85.62%.
15n isotopic tracing experimental result shows (Fig. 4), and the activity of denitrifying bacterium is by the 6.9nmol Ng in in-situ deposition thing
-1h
-1bring up to 11.3nmol Ng
-1h
-1.Quantitative PCR result shows that the abundance of (Fig. 5) aerobic ammonia oxidation bacterium is by 5.8. × 10 in in-situ deposition thing
7copiesg
-1bring up to 2.1 × 10
8copiesg
-1.
It is emphasized that; although above-described embodiment to be contrasted detailed description to the present invention, these illustrate just illustrative to the present invention, instead of the restriction to invention; any innovation and creation do not exceeded in connotation of the present invention, all drop within rights protection scope of the present invention.
Claims (5)
1. utilize the method and system of water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal, described system comprises water feed apparatus, tide current reactor, water-freeing arrangement and time controller.Its know-why is as follows: the ball fresh WTRs being made 1-3cm, and naturally dries, and takes the WTRs of a certain amount of preparation, is filled in tide current reactor, adds a certain proportion of settling afterwards in tide current reactor.Control intake pump working time by motorized valve, in bottom-up mode, in system, supply synthetic wastewater is to the specific water surface, under this anoxic condition, carry out microorganism denitrification, and WTRs realizes the Adsorption to phosphorus simultaneously.Control wet-pit by motorized valve, drain sewage fast, realize the reoxygenation of intrasystem matrix and microorganism, and realize nitrification in this case.Whole process has been controlled by time controller.
2. the method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal according to claim 1, it is characterized in that: in tide current reactor, matrix is all the WTRs of the 1-3cm after drying, shape is not limit, cube, circle and irregularly shapedly all can reach ideal effect, especially be good with circle, only lay cobble and the quartz sand of different-grain diameter at system bottom.
3. the method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal according to claim 1,2, it is characterized in that: in tide current reactor, water-in is higher than reaction liquid level, reaction liquid level shows higher than matrix, and hydraulic load is 0.2-0.3m
3m
-2day
-1.
4. the method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal according to claim 1,2,3, is characterized in that: tide current reactor operation scheme is " water inlet-reaction-draining-mummification ".For realizing aerobic-anaerobic environment alternately, system adopts the operation scheme of 1 every day in cycle, and the concrete time is: water inlet 4min, reaction 21h53min, emptying 3min, mummification 2h.
5. the method and system utilizing water purification plant's waste sludge strengthening tide current reactor Nitrogen/Phosphorus Removal according to claim 1,2,3,4, it is characterized in that: in tide current reactor, nitrogen is removed based on microbial process, nitration reaction occurs in step of reaction initial stage and mummification stage, and anti-nitration reaction mainly occurs in the step of reaction middle and later periods; The removal of phosphor contaminant is based on physical and chemical adsorption, and the Adsorption of phosphorus occurs in between water and drainage period.
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430537A (en) * | 2016-11-14 | 2017-02-22 | 兰州交通大学 | Tide-type biological contact oxidation treatment process |
| CN108675443A (en) * | 2018-04-11 | 2018-10-19 | 南京大学 | A kind of Novel anaerobic granular sludge expansion bed reactor and start and run method |
| CN109399808A (en) * | 2018-12-10 | 2019-03-01 | 云南大学 | A kind of bacteria filter device and application method of high-efficient purification sewage |
| CN109928507A (en) * | 2019-04-19 | 2019-06-25 | 贵州民族大学 | A kind of tidal flow constructed wetland with rich reoxygenation system and its maintaining method |
| CN110272172A (en) * | 2019-07-31 | 2019-09-24 | 河南中汇环保科技有限公司 | A kind of transformation of environment-friendly and energy-efficient rural area swag and domestic sewage treatment device |
| CN111943359A (en) * | 2020-07-24 | 2020-11-17 | 山东大学 | Artificial wetland coupled with iron ore enhanced denitrification, operation method and application |
-
2014
- 2014-01-21 CN CN201410033376.2A patent/CN104787884A/en active Pending
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430537A (en) * | 2016-11-14 | 2017-02-22 | 兰州交通大学 | Tide-type biological contact oxidation treatment process |
| CN108675443A (en) * | 2018-04-11 | 2018-10-19 | 南京大学 | A kind of Novel anaerobic granular sludge expansion bed reactor and start and run method |
| CN108675443B (en) * | 2018-04-11 | 2020-12-04 | 南京大学 | Anaerobic granular sludge expanded bed reactor and starting and operating method |
| CN109399808A (en) * | 2018-12-10 | 2019-03-01 | 云南大学 | A kind of bacteria filter device and application method of high-efficient purification sewage |
| CN109928507A (en) * | 2019-04-19 | 2019-06-25 | 贵州民族大学 | A kind of tidal flow constructed wetland with rich reoxygenation system and its maintaining method |
| CN110272172A (en) * | 2019-07-31 | 2019-09-24 | 河南中汇环保科技有限公司 | A kind of transformation of environment-friendly and energy-efficient rural area swag and domestic sewage treatment device |
| CN111943359A (en) * | 2020-07-24 | 2020-11-17 | 山东大学 | Artificial wetland coupled with iron ore enhanced denitrification, operation method and application |
| CN111943359B (en) * | 2020-07-24 | 2022-06-03 | 山东大学 | Artificial wetland coupled with iron ore enhanced denitrification, operation method and application |
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Application publication date: 20150722 |