CN103693806A - Authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device - Google Patents
Authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device Download PDFInfo
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Abstract
The invention discloses an authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device. The device is provided with a chemical flocculation settling area, a ferrous salt supplement area, a nitrogen and phosphorus removal area and a three-phase separation area from bottom to top, wherein the chemical flocculation settling area is provided with a solid-liquid separation phosphorus removal area and a slowly flocculating phosphorus removal area, the ferrous salt supplement area is provided with a zero-valent iron filling area, the nitrogen and phosphorus removal area is provided with a rapidly settling phosphorus removal area and a ferrous oxidization biological nitrogen removal area from inside to outside, the three-phase separation area is provided with a gas release area and a settling area, and the settling area is provided with a biological sludge discharge port, a reflux port, an overflow weir and a water outlet. According to the device, the matrix of the phosphorus removal process and the nitrogen removal process can be recycled; by using biological denitrificatio and authigenic ferric salt chemical phosphorus removal agent, the cost for removing phosphorus is lowered; zero-valent iron such as cheap iron residue/scrap iron is dissolved by acid ferric salt phosphorous removal reaction solution so as to provide ferrous salt matrix for biological denitrification, and the purpose of processing waste with waste is achieved; by using autotroph for denitrification, the problem of insufficient carbon source in biological denitrification of wastewater is effectively solved.
Description
Technical field
The present invention relates to denitrification dephosphorization apparatus, relate in particular to a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus.
Background technology
Body eutrophication is the important environmental problem that China faces.According to China < < whole nation Environmental statistics communique > > and < < China Environmental State Bulletin > >, in 2012 Nian62Ge state control emphasis lakes (reservoir), eutrophic state water body accounts for 86.7%, and the main contamination index that causes body eutrophication is total nitrogen and total phosphorus.Therefore, denitrogenation of waste water dephosphorization has become the important channel of control body eutrophication.
Biological wastewater treatment technology is conventional wastewater processing technology.Waste water is through biological treatment (second-stage treatment), and COD concentration is substantially up to standard, but that concentration of nitrogen and phosphorus exceeds standard is still serious.For the low C:N:P ratio wastewater of this class, process, traditional wastewater biological denitrificaion (nitrated-denitrification) technique and biological phosphate-eliminating (aerobic suction phosphorus-anaerobic phosphorus release) technique is aobvious weak, and this is because these bioprocesss need electron donor, conventionally by organism, is provided.Therefore, novel denitrification dephosphorization technique exploitation is extremely urgent.
Chemical precipitation method is a kind of important waste water dephosphorization technology.Ferric salt because of its dephosphorization efficiency by using high, the advantage such as stability is strong and being widely used.Yet, practical discovery, ferric salt dephosphorization technique also faces the shortcomings such as reagent cost is high, consumption is large.Therefore, relatively cheap ferric salt source is expanded very necessary.
Nitrate type anaerobism iron oxidation (Nitrate-dependent Anaerobic Ferrous Oxidation, NAFO) be the great discovery of environmental area and microorganism field, under anaerobic, some microorganisms can be take ferrous salt as electron donor, and nitrate or nitrite are reduced to N
2, ferrous salt is oxidized to ferric salt (formula 1) simultaneously.Because NAFO is autotrophic organism reaction process, utilize this reaction to carry out denitrogenation of waste water, can effectively alleviate the problem of carbon source deficiency in wastewater biological denitrificaion.On the other hand, the Fe that NAFO denitrification process produces
3+can be waste water chemical dephosphorization ferric salt source is provided.
10FeCO
3 + 2NO
3 - + 24H
2O → 10Fe(OH)
3 + N
2 + 10HCO
3 - + 8H
+ (1)
Ferric salt, except solution after phosphorus reaction is acid, can dissolve the cheap Zero-valent Iron such as iron filings/scum (common industrial waste) to produce Fe
2+, for NAFO denitrification process provides matrix (electron donor).Finally realize spontaneous ferric salt chemical dephosphorization process and anaerobism iron oxidation biological denitrification process integrated.
From above-mentioned spontaneous ferric salt chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integral process principle, this technique can realize the matrix recycle of dephosphorization process and denitrification process.By backflow NAFO reaction product, for chemical dephosphorization provides ferric salt precipitation agent, reduce dephosphorization cost; By the acid-reaction liquid after ferric salt dephosphorization, dissolve the cheap Zero-valent Iron such as iron filings/scum, for biological denitrificaion provides ferrous salt matrix, realize the treatment of wastes with processes of wastes against one another; By adopting NAFO denitrification of autotrophic organism, effectively solve the problem of carbon source deficiency in wastewater biological denitrificaion dephosphorization process.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus is provided.
Spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus is provided with chemical flocculation precipitation district, ferrous salt additional area, denitrogenation dephosphorizing district and three-phase separation area from top to bottom successively; Chemical flocculation precipitation district is provided with solid-liquid separation dephosphorization district and the dephosphorization district of flocculating at a slow speed from bottom to top, solid-liquid separation dephosphorization district bottom centre is provided with chemical sludge discharge outlet, solid-liquid separation dephosphorization district and the dephosphorization district of flocculating at a slow speed directly connect, and the central upper portion place, dephosphorization district of flocculating is at a slow speed provided with hydraucone; Top, chemical flocculation precipitation district is connected and connects with ferrous salt additional area by supporting plate, and ferrous salt additional area inside is provided with Zero-valent Iron fill area; Ferrous salt additional area top is connected with denitrogenation dephosphorizing district by post disc type up-flow water distributor, denitrogenation dephosphorizing district is provided with stage casing, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district from inside to outside successively, rapid precipitation dephosphorization district hypomere is positioned at chemical flocculation precipitation district, hypomere end, rapid precipitation dephosphorization district is provided with hydraucone, hydraucone below is provided with reflector, top, stage casing, rapid precipitation dephosphorization district is provided with from bottom to top successively into stype hydrophone and taper water-in, enter stype hydrophone and be connected with drug-feeding tube, taper water-in) be connected with water inlet pipe; Denitrogenation dephosphorizing district is oxidized top, biological denitrificaion district by iron and three-phase separation area connects, three-phase separation area is provided with rapid precipitation dephosphorization district epimere, outgas district and settling region from inside to outside successively, outgas district and settling region are separated by mud guard, three-phase separation area bottom is provided with biological sludge discharge outlet, and three-phase separation area top is provided with refluxing opening, overflow weir and water outlet.
Described hydraucone is positioned at 1/4 ~ 1/3 place, top, dephosphorization district of flocculating at a slow speed.The described stype hydrophone that enters is positioned at 1/4 ~ 1/3 place, top, stage casing, rapid precipitation dephosphorization district, and taper water-in is positioned at 1/5 ~ 1/4 place, top, stage casing, rapid precipitation dephosphorization district.Described stage casing, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district sectional area ratio are 1:20 ~ 40.The described dephosphorization of flocculation at a slow speed district and iron oxidation biological denitrificaion district height ratio are 1:5 ~ 10.Described refluxing opening is positioned at 1/3 ~ 1/2 place, top, settling region, and refluxing opening phegma flow and taper water-in flooding velocity ratio are 0.4 ~ 3.0.Described bottom, chemical flocculation precipitation district inclination alpha is 55 °, and reflector cone angle beta is 17 °, and three-phase separation area bottom tilt angle gamma is 50 °, and upper end, stage casing, rapid precipitation dephosphorization district inclination angle δ is 145 °, and mud guard bottom inclination angle ε is 140 °.
The present invention's beneficial effect is compared with prior art: 1) reactor is comprised of chemical flocculation precipitation district, ferrous salt additional area, denitrogenation dephosphorizing district and four unit of three-phase separation area, and adjacent cells has complementary functions, compact construction, and floor space is little; 2) by structure ingehious design, realize the recycle of chemical dephosphorization process and biological denitrification process matrix, reduce additional pharmaceutical quantities; 3), by backflow anaerobism iron oxidation reaction product, for chemical dephosphorization provides ferric salt precipitation agent, reduce dephosphorization cost; 4) by the acid-reaction liquid after ferric salt dephosphorization, dissolve the cheap Zero-valent Iron such as iron filings/scum, for biological denitrificaion provides ferrous salt matrix, the treatment of wastes with processes of wastes against one another; 5) associating autotrophic type biological denitrification process and chemical dephosphorization technique, in one, effectively solve the carbon resource shortage problem in wastewater biological denitrificaion dephosphorization process.
Accompanying drawing explanation
Fig. 1 is spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus section of structure;
Fig. 2 is spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus structure A-A sectional view;
In figure: chemical flocculation precipitation district I, ferrous salt additional area II, denitrogenation dephosphorizing reaction zone III, three-phase separation area IV; Chemical sludge discharge outlet 1, solid-liquid separation dephosphorization district 2, reflector 3, hydraucone 4, at a slow speed flocculate dephosphorization district 5, supporting plate 6, Zero-valent Iron fill area 7, post disc type up-flow water distributor 8, rapid precipitation dephosphorization district 9, iron oxidation biological denitrificaion district 10, drug-feeding tube 11, enter stype hydrophone 12, water inlet pipe 13, taper water-in 14, mud guard 15, outgas district 16, settling region 17, overflow weir 18, water outlet 19, refluxing opening 20, biological sludge discharge outlet 21.
Embodiment
As shown in Figure 1, 2, spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus is provided with chemical flocculation precipitation district I, ferrous salt additional area II, denitrogenation dephosphorizing district III and three-phase separation area IV from top to bottom successively, chemical flocculation precipitation district I is provided with solid-liquid separation dephosphorization district 2 and the dephosphorization district 5 of flocculating at a slow speed from bottom to top, solid-liquid separation dephosphorization district 2 bottom centre are provided with chemical sludge discharge outlet 1, solid-liquid separation dephosphorization district 2 and the dephosphorization district 5 of flocculating at a slow speed directly connect, and the 5 central upper portion places, dephosphorization district of flocculating are at a slow speed provided with hydraucone 4, I top, chemical flocculation precipitation district is connected and connects with ferrous salt additional area II by supporting plate 6, and ferrous salt additional area II inside is provided with Zero-valent Iron fill area 7, ferrous salt additional area II top is connected with denitrogenation dephosphorizing district III by post disc type up-flow water distributor 8, denitrogenation dephosphorizing district III is provided with 9 stage casings, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district 10 from inside to outside successively, rapid precipitation dephosphorization district 9 hypomeres are positioned at chemical flocculation precipitation district I, 9 hypomere ends, rapid precipitation dephosphorization district are provided with hydraucone 4, hydraucone 4 belows are provided with reflector 3, 9 tops, stage casing, rapid precipitation dephosphorization district are provided with from bottom to top successively into stype hydrophone 12 and taper water-in 14, entering stype hydrophone 12 is connected with drug-feeding tube 11, taper water-in 14 is connected with water inlet pipe 13, denitrogenation dephosphorizing district III is oxidized 10 tops, biological denitrificaion district by iron and three-phase separation area IV connects, three-phase separation area IV is provided with rapid precipitation dephosphorization district 9 epimeres, 16He settling region, outgas district 17 from inside to outside successively, separate by mud guard 15 16He settling region 17 in outgas district, three-phase separation area IV bottom is provided with biological sludge discharge outlet 21, and three-phase separation area IV top is provided with refluxing opening 20, overflow weir 18 and water outlet 19.
Described hydraucone 4 is positioned at 1/4 ~ 1/3 place, 5 top, dephosphorization district of flocculating at a slow speed.The described stype hydrophone 12 that enters is positioned at 1/4 ~ 1/3 place, 9 top, stage casing, rapid precipitation dephosphorization district, and taper water-in 14 is positioned at 1/5 ~ 1/4 place, 9 top, stage casing, rapid precipitation dephosphorization district.Described 9 stage casings, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district 10 sectional area ratios are 1:20 ~ 40.The described dephosphorization of flocculation at a slow speed district 5 is 1:5 ~ 10 with iron oxidation biological denitrificaion district 10 height ratio.Described refluxing opening 20 is positioned at 1/3 ~ 1/2 place, 17 top, settling region, and refluxing opening 20 phegma flows and taper water-in 14 flooding velocity ratios are 0.4 ~ 3.0.Described chemical flocculation precipitation district I bottom inclination alpha is 55 °, and reflector 3 cone angle beta are 17 °, and three-phase separation area IV bottom tilt angle gamma is 50 °, and rapid precipitation dephosphorization district 9 upper end, stage casing inclination angle δ are 145 °, and mud guard 18 inclination angle, bottom ε are 140 °.
Spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus can be made of PVC plate and steel plate, its working process is as follows: containing the waste water of nitre nitrogen/nitrite nitrogen and phosphorus, and by settling region 17, through refluxing opening 20, refluxed be rich in ferric salt solution together by water inlet pipe 13 access to plant rapid precipitation dephosphorization districts 9, mixed solution flow velocity after taper water-in 14 is improved, downwards with through drug-feeding tube 11 with enter adding medicine outside the part of stype hydrophone 12 accesss to plant and fully mix, carry out rapid chemical dephosphorization process; Solidliquid mixture after rapid chemical dephosphorization flows downward, by the hydraucone 4 being connected with 9 bottoms, rapid precipitation dephosphorization district, enter the dephosphorization district 5 of flocculating at a slow speed, in this region, carry out chemical flocculation dephosphorization process at a slow speed, reacted solid enters solid-liquid separation dephosphorization district 2 downwards and carries out solid-liquid separation, solid matter is discharged by chemical sludge discharge outlet 1, reacted liquid (being acid) upwards enters the Zero-valent Iron fill area 7 of ferrous salt additional area II through supporting plate 6, the Zero-valent Iron material dissolves such as iron filings/scum that inside is filled are ferrous iron; Containing ferrous waste water, through post disc type up-flow water distributor 8, enter iron oxidation biological denitrificaion district 10 and carry out biological denitrificaion; Reacted solid-liquid-gas mixture enters three-phase separation area IV through 10 tops, biological denitrificaion district, wherein, gas enters atmosphere through outgas district 16, solidliquid mixture 17 carries out solid-liquid separation through settling region, liquid is discharged reactor by overflow weir 18 and water outlet 19, solid is discharged reactor by top biological sludge discharge outlet 21, and in settling region 17, settled solution part refluxes through refluxing opening 20.
Claims (7)
1. spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus, is characterized in that: device is provided with chemical flocculation precipitation district (I), ferrous salt additional area (II), denitrogenation dephosphorizing district (III) and three-phase separation area (IV) from top to bottom successively, chemical flocculation precipitation district (I) is provided with solid-liquid separation dephosphorization district (2) and the dephosphorization district (5) of flocculating at a slow speed from bottom to top, solid-liquid separation dephosphorization district (2) bottom centre is provided with chemical sludge discharge outlet (1), solid-liquid separation dephosphorization district (2) and the dephosphorization district (5) of flocculating at a slow speed directly connect, and the central upper portion place, dephosphorization district (5) of flocculating is at a slow speed provided with hydraucone (4), top, chemical flocculation precipitation district (I) is connected and connects with ferrous salt additional area (II) by supporting plate (6), and ferrous salt additional area (II) inside is provided with Zero-valent Iron fill area (7), ferrous salt additional area (II) top is connected with denitrogenation dephosphorizing district (III) by post disc type up-flow water distributor (8), denitrogenation dephosphorizing district (III) is provided with (9) stage casing, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district (10) from inside to outside successively, rapid precipitation dephosphorization district (9) hypomere is positioned at chemical flocculation precipitation district (I), hypomere end, rapid precipitation dephosphorization district (9) is provided with hydraucone (4), hydraucone (4) below is provided with reflector (3), top, stage casing, rapid precipitation dephosphorization district (9) is provided with from bottom to top successively into stype hydrophone (12) and taper water-in (14), entering stype hydrophone (12) is connected with drug-feeding tube (11), taper water-in (14) is connected with water inlet pipe (13), denitrogenation dephosphorizing district (III) is oxidized (10) top, biological denitrificaion district by iron and three-phase separation area (IV) connects, three-phase separation area (IV) is provided with rapid precipitation dephosphorization district (9) epimere, outgas district (16) and settling region (17) from inside to outside successively, separate by mud guard (15) outgas district (16) and settling region (17), three-phase separation area (IV) bottom is provided with biological sludge discharge outlet (21), and three-phase separation area (IV) top is provided with refluxing opening (20), overflow weir (18) and water outlet (19).
2. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus according to claim 1, is characterized in that: described hydraucone (4) is positioned at 1/4 ~ 1/3 place, top, dephosphorization district (5) of flocculating at a slow speed.
3. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron according to claim 1 is oxidized biological denitrificaion integrated apparatus, it is characterized in that: the described stype hydrophone (12) that enters is positioned at 1/4 ~ 1/3 place, top, stage casing, rapid precipitation dephosphorization district (9), and taper water-in (14) is positioned at 1/5 ~ 1/4 place, top, stage casing, rapid precipitation dephosphorization district (9).
4. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus according to claim 1, is characterized in that: described (9) stage casing, rapid precipitation dephosphorization district and iron oxidation biological denitrificaion district (10) sectional area ratio are 1:20 ~ 40.
5. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron oxidation biological denitrificaion integrated apparatus according to claim 1, is characterized in that: the described dephosphorization of flocculation at a slow speed district (5) is 1:5 ~ 10 with iron oxidation biological denitrificaion district (10) height ratio.
6. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron according to claim 1 is oxidized biological denitrificaion integrated apparatus, it is characterized in that: described refluxing opening (20) is positioned at 1/3 ~ 1/2 place, top, settling region (17), refluxing opening (20) phegma flow and taper water-in (14) flooding velocity ratio are 0.4 ~ 3.0.
7. a kind of spontaneous high ferro chemical dephosphorization-anaerobism iron according to claim 1 is oxidized biological denitrificaion integrated apparatus, it is characterized in that: described bottom, chemical flocculation precipitation district (I) inclination alpha is 55 °, reflector (3) cone angle beta is 17 °, three-phase separation area (IV) bottom tilt angle gamma is 50 °, rapid precipitation dephosphorization district (9) upper end, stage casing inclination angle δ is 145 °, and mud guard (18) inclination angle, bottom ε is 140 °.
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| CN104085986A (en) * | 2014-07-07 | 2014-10-08 | 东华大学 | Air-lifting type external-circulation vortex enhanced biological nitrogen-removal reactor |
| CN104843902A (en) * | 2015-05-15 | 2015-08-19 | 浙江大学 | Integrated biological vector dephosphorizing reactor |
| CN105645602A (en) * | 2016-03-30 | 2016-06-08 | 浙江大学 | Automatic fed-batch type efficient iron salt denitrification reaction device and automatic fed-batch type efficient iron salt denitrification reaction method for bacteria |
| CN105776530A (en) * | 2016-04-22 | 2016-07-20 | 浙江大学 | Self-shelling malysite denitrification reaction device and self-shelling method |
| CN105776759A (en) * | 2016-04-18 | 2016-07-20 | 浙江艾摩柯斯环境科技有限公司 | Alkalinity self-regulating efficient anaerobic iron oxidation denitrification reactor and method thereof |
| CN110357367A (en) * | 2019-08-15 | 2019-10-22 | 沈阳环境科学研究院 | Based on low-intensity magnetic field-sewage water denitrification dephosphorization apparatus associated with Zero-valent Iron-MABR |
| CN110606626A (en) * | 2019-09-27 | 2019-12-24 | 西安建筑科技大学 | Synchronous nitrogen and phosphorus removal sewage treatment process |
| CN111943444A (en) * | 2020-08-19 | 2020-11-17 | 苏州科技大学 | Sewage treatment device and method for enhancing municipal sewage autotrophic nitrogen removal and synchronous phosphorus recovery |
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| CN104843902A (en) * | 2015-05-15 | 2015-08-19 | 浙江大学 | Integrated biological vector dephosphorizing reactor |
| CN105645602A (en) * | 2016-03-30 | 2016-06-08 | 浙江大学 | Automatic fed-batch type efficient iron salt denitrification reaction device and automatic fed-batch type efficient iron salt denitrification reaction method for bacteria |
| CN105776759B (en) * | 2016-04-18 | 2018-11-30 | 浙江艾摩柯斯环境科技有限公司 | The efficient anaerobic iron oxidation process denitrification reactor and its method of basicity Self-controlled |
| CN105776759A (en) * | 2016-04-18 | 2016-07-20 | 浙江艾摩柯斯环境科技有限公司 | Alkalinity self-regulating efficient anaerobic iron oxidation denitrification reactor and method thereof |
| CN105776530B (en) * | 2016-04-22 | 2018-05-29 | 浙江大学 | One kind is from shell molysite denitrogenation reactor and from shell method |
| CN105776530A (en) * | 2016-04-22 | 2016-07-20 | 浙江大学 | Self-shelling malysite denitrification reaction device and self-shelling method |
| CN110357367A (en) * | 2019-08-15 | 2019-10-22 | 沈阳环境科学研究院 | Based on low-intensity magnetic field-sewage water denitrification dephosphorization apparatus associated with Zero-valent Iron-MABR |
| CN110606626A (en) * | 2019-09-27 | 2019-12-24 | 西安建筑科技大学 | Synchronous nitrogen and phosphorus removal sewage treatment process |
| CN110606626B (en) * | 2019-09-27 | 2021-12-21 | 西安建筑科技大学 | Synchronous nitrogen and phosphorus removal sewage treatment process |
| CN111943444A (en) * | 2020-08-19 | 2020-11-17 | 苏州科技大学 | Sewage treatment device and method for enhancing municipal sewage autotrophic nitrogen removal and synchronous phosphorus recovery |
| CN111943444B (en) * | 2020-08-19 | 2021-11-23 | 苏州科技大学 | Sewage treatment device and method for enhancing municipal sewage autotrophic nitrogen removal and synchronous phosphorus recovery |
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