CN105152496A - BC-BAF (biochemical-biological aerated filter) municipal sewage treatment technique - Google Patents
BC-BAF (biochemical-biological aerated filter) municipal sewage treatment technique Download PDFInfo
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- CN105152496A CN105152496A CN201510681608.XA CN201510681608A CN105152496A CN 105152496 A CN105152496 A CN 105152496A CN 201510681608 A CN201510681608 A CN 201510681608A CN 105152496 A CN105152496 A CN 105152496A
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Abstract
The invention provides a BC-BAF (biochemical-biological aerated filter) municipal sewage treatment technique. The technique comprises the following steps: treating sewage through a coarse grid and a lifting pump well, treating through a fine grid, treating in a sedimentation tank, treating in a preliminary sedimentation tank, treating through a superfine grid, treating through a BC reactor, treating through a decarbonization BAF, treating through a denitrification BAF, carrying out coagulation and filtration, disinfecting, treating through a metering tank, and discharging after reaching the standard. The technique has the characteristics of favorable capacities for removing suspended substances, COD (chemical oxygen demand) and ammonia nitrogen, favorable denitrification capacity under low carbon/nitrogen ratio conditions and favorable denitrification and dephosphorization capacities under low-temperature conditions, no need of any additional deodorizing system, and low sludge yield. The municipal sewage treated by the technique can achieve Grade 1A in Municipal Sewage Treatment Plant Pollutant Discharge Standard.
Description
Technical field
The present invention relates to a kind of sewage treatment process, relate to a kind of BC-BAF municipal wastewater treatment process specifically, belong to water treatment field.
Background technology
Along with the continuous quickening of urbanization and process of industrialization, environmental pollution is day by day serious, various purification method for effluent and technology emerge in an endless stream and obtain application, but because these purifying process of waste water also exist various problem, particularly along with the growing tension with soil, the energy that improves constantly of current emission standard, greatly limit the engineer applied of these purification of waste water treatment technologies.
BAF BAF is the sewage treatment technique risen the beginning of the nineties, widely popular in developed countries such as America and Europe and Japan.This technique has removes SS, chemical oxygen demand (COD), BOD and nitrated, denitrogenation, dephosphorization, removal AOX(objectionable impurities) effect, be characterized in integrating bio-oxidation and retaining suspended solids, save post precipitation pond (second pond), its volumetric loading and hydraulic load large, hydraulic detention time is short, and required initial cost is few, and effluent quality is good, operation energy consumption is low, economic operating cost.
But BAF requires higher to influent quality, needs to carry out coagulating sedimentation pre-treatment; Denitrogenation dephosphorizing ability is compared traditional technology and is short of to some extent, and denitrification ability is not enough, needs to add carbon source in operational process, and dephosphorization aspect needs to add chemical dephosphorization medicament at preprocessing process, and reagent cost is high; BAF is less due to particle diameter of filter medium, often filter clogging occurs, if long-term back flushing is not in place, filtrate can be caused to harden and cannot run; Need back-purge system be equipped with, higher to the requirement of automatization in operation.
Before BAF technique, increase applicable denitrification system or adopt engineering bacteria to be more efficiently the effective way solving BAF technique denitrogenation dephosphorizing ability shortcoming.By adding high efficiency engineering bacterium, and maintaining high efficiency engineering bacterium in intrasystem superiority, adopting suitable Prepositive denitrification system simultaneously, effectively effluent quality can be controlled to one-level A standard in conjunction with the decarburization of BAF and nitrification ability.
Summary of the invention
Main purpose of the present invention is to provide a kind of BC-BAF municipal wastewater treatment process, to solve the problem of BAF denitrogenation dephosphorizing scarce capacity.
To achieve these goals, the invention provides a kind of BC-BAF municipal wastewater treatment process, this technical process is: sewage → coarse rack and lifting pump sump → fine fack → settling pit → preliminary sedimentation tank → ultra-fine grid → BC biochemical reactor → decarburization BAF → denitrogenation BAF → coagulation and filtration → sterilization → scale tank → detection qualified discharge.Its implementation comprises the steps:
(1) sewage collects through pipe network, retains large volume pollutent by coarse rack;
(2) coarse rack water outlet flows into sewage lifting pump sump, then is promoted to fine fack from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and small volume pollutent;
(3) fine fack water outlet flows into settling pit, and the dense medium in water precipitates and is separated by settling pit;
(4) settling pit water outlet flows into preliminary sedimentation tank, and in preliminary sedimentation tank, remove suspended substance further, the mode also by adding chemical agent removes part total phosphorus;
(5) fiber, hair and other the tiny suspended substances that suspend in water are removed in preliminary sedimentation tank water outlet by ultra-fine grid;
(6) ultra-fine grid water outlet gravity flow enters BC biochemical reactor, mixes, and add microorganism promotor at the former water of BC biochemical reactor ingress and the BAF sewage that refluxes;
(7) BC biochemical reactor water outlet gravity flow enters into decarburization BAF, removes majority of organic pollutants, part ammonia nitrogen and part total phosphorus in decarburization BAF;
(8) decarburization BAF water outlet gravity flow enters into denitrogenation BAF, removes ammonia nitrogen further, most ammonia-nitrogen is converted into nitrate in denitrogenation BAF;
(9) denitrogenation BAF water outlet gravity flow enters in coagulation and filtration system, by adding Dephosphorization reagent, can remove total phosphorus and suspended substance further;
(10) water outlet of coagulation and filtration system is by detecting qualified discharge through scale tank after sterilization.
Further, in a kind of BC-BAF municipal wastewater treatment process, BC biochemical reactor built-in biological filler, biologic packing material adopts pencil filler, and material is PP and vinylon, and filler diameter is 40 ~ 100mm, and packing specific area is 400 ~ 800m
2/ m
3, biofilm weight is that in 2 ~ 5kg/m, BC biochemical reactor, filler arranges that density is 40% ~ 80%, and filler arrangement pitch is 50 ~ 250mm.BC biochemical reactor adds genus bacillus in initial start stage, and the genus bacillus utilized in this technique mainly comprises Bacillus licheniformis, causticity bacillus, Bacillus sphaericus, bacillus polymyxa, Bacillus macerans; Genus bacillus has superpower fecundity, has in harsh extreme environment also have adaptive faculty at low temperature, high salinity, high pressure etc.; The genus bacillus selected has higher capacity of decomposition to protein, starch and fat, can fast decoupled organic pollutant; Genus bacillus directly can draw amine (organonitrogen), ammonia nitrogen and ammonium salt, thus carry out denitrogenation, nitrogen element portions enters in air with nitrogen form, part enters in mud with the form of organonitrogen, and removed from system by the discharge of excess sludge, genus bacillus when denitrogenation, not by the constraint of C/N, simultaneously by temperature impact compared with nitrifier and denitrifying bacteria little; BC biochemical reactor continues to add microorganism promotor in operational process, and this promotor is major ingredient by veterinary antibiotics, and mineral substance is that auxiliary material carries out fermentation and forms under certain envrionment temperature, and dosage is 0.2 ~ 1.2mL/kgBOD.
Further, in a kind of BC-BAF municipal wastewater treatment process, decarburization BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.2 ~ 0.5, and denitrogenation BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.5 ~ 1.0.
Further, in a kind of BC-BAF municipal wastewater treatment process, before decarburization BAF and denitrogenation BAF backwash water are pumped into coarse rack after backwash tank is collected, containing a large amount of genus bacillus in excess sludge, bacillus fits nitrogen and thioflavin bacterial classification, can by nitrogen in sewage and element sulphur and oxidized before the material absorbing of the state such as ammonia, ammonia salt, hydrogen sulfide, eliminate foul smell and produce composition, the object of deodorizing can be reached.
Apply art breading municipal wastewater of the present invention, water outlet can reach " urban wastewater treatment firm pollutant emission standard " one-level A standard, and present invention process has the ability of good removal suspended substance, COD and ammonia nitrogen; Denitrification ability under low ratio of carbon to ammonium condition; Denitrogenation dephosphorizing ability under cold condition; Without the need to extra deodoration system; Low sludge yield.
Accompanying drawing explanation
Fig. 1 is a kind of BC-BAF municipal wastewater processing technological flow schematic diagram of the present invention.
Embodiment
In order to enable one of ordinary skill in the art clearly understand technology contents of the present invention, now elaborate further with specific embodiment.
Embodiment 1: the invention provides a kind of BC-BAF municipal wastewater treatment process, its implementation comprises the steps: that (1) sewage collects through pipe network, retains large volume pollutent by coarse rack, and coarse rack grid spacing is 25mm; (2) coarse rack water outlet flows into sewage lifting pump sump, then is promoted to fine fack from sewage lifting pump sump through lift pump, and lifting capacity is 1000m
3/ h, fine fack will tackle impurities in water and small volume pollutent, and fine fack grid spacing is 5mm; (3) fine fack water outlet flows into settling pit, and settling pit adopts swirling flow desilting device, and the dense medium in water precipitates and is separated by settling pit; (4) settling pit water outlet flows into preliminary sedimentation tank, and preliminary sedimentation tank adopts tube settler, removes suspended substance further, remove part total phosphorus by the mode adding PAC in preliminary sedimentation tank; (5) fiber, hair and other the tiny suspended substances that suspend in water are removed in preliminary sedimentation tank water outlet by ultra-fine grid, and ultra-fine grid adopts rotary fine fack, and grid spacing is 1mm; (6) ultra-fine grid water outlet gravity flow enters BC biochemical reactor, and BC biochemical reactor adopts steel and concrete structure, and hydraulic detention time is 1.0h, and in BC biochemical reactor ingress, former water and the BAF sewage that refluxes mixes, and adds microorganism promotor; (7) BC biochemical reactor water outlet gravity flow enters into decarburization BAF, decarburization BAF adopts steel and concrete structure, and hydraulic detention time is 1h, built-in volcanic filling material, packing material size is 5 ~ 10mm, removes majority of organic pollutants, part ammonia nitrogen and part total phosphorus in decarburization BAF; (8) decarburization BAF water outlet gravity flow enters into denitrogenation BAF, and denitrogenation BAF adopts steel and concrete structure, and hydraulic detention time is 1h, built-in volcanic filling material, packing material size is 4 ~ 6mm, removes ammonia nitrogen further, most ammonia-nitrogen is converted into nitrate in denitrogenation BAF; (9) denitrogenation BAF water outlet gravity flow enters in coagulation and filtration system, by adding Dephosphorization reagent iron(ic) chloride, removes total phosphorus and suspended substance further; (10) water outlet of coagulation and filtration system is by after disinfection by ultraviolet light, detects qualified discharge through Bashel scale tank.
BC biochemical reactor built-in biological filler, biologic packing material adopts pencil filler, and material is PP and vinylon, and filler diameter is 55mm, and packing specific area is 500m
2/ m
3, biofilm weight is that in 3kg/m, BC biochemical reactor, filler arranges that density is 50%, and filler arrangement pitch is 150mm.BC biochemical reactor adds genus bacillus in initial start stage, and dosage is 3000kg, and the genus bacillus of utilization mainly comprises Bacillus licheniformis, causticity bacillus, Bacillus sphaericus, bacillus polymyxa, Bacillus macerans.BC biochemical reactor continues to add microorganism promotor in operational process, and dosage is 0.5mL/kgBOD.Decarburization BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.5, and denitrogenation BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.5, and total reflux ratio is 1.0.Before decarburization BAF and denitrogenation BAF backwash water are pumped into coarse rack after backwash tank is collected.
Embodiment 2: the invention provides a kind of BC-BAF municipal wastewater treatment process, its implementation comprises the steps: that (1) sewage collects through pipe network, retains large volume pollutent by coarse rack, and coarse rack grid spacing is 20mm; (2) coarse rack water outlet flows into sewage lifting pump sump, then is promoted to fine fack from sewage lifting pump sump through lift pump, and lifting capacity is 2000m
3/ h, fine fack will tackle impurities in water and small volume pollutent, and fine fack grid spacing is 4mm; (3) fine fack water outlet flows into settling pit, and settling pit adopts aerated grit chamber, and the dense medium in water precipitates and is separated by settling pit; (4) settling pit water outlet flows into preliminary sedimentation tank, and preliminary sedimentation tank adopts width flow settling pond, removes suspended substance further, remove part total phosphorus by the mode adding PFS in preliminary sedimentation tank; (5) fiber, hair and other the tiny suspended substances that suspend in water are removed in preliminary sedimentation tank water outlet by ultra-fine grid, and ultra-fine grid adopts rotary fine fack, and grid spacing is 0.8mm; (6) ultra-fine grid water outlet gravity flow enters BC biochemical reactor, and BC biochemical reactor adopts steel and concrete structure, and hydraulic detention time is 0.45h, and in BC biochemical reactor ingress, former water and the BAF sewage that refluxes mixes, and adds microorganism promotor; (7) BC biochemical reactor water outlet gravity flow enters into decarburization BAF, decarburization BAF adopts steel and concrete structure, and hydraulic detention time is 0.45h, built-in ceramics filling, packing material size is 4 ~ 6mm, removes majority of organic pollutants, part ammonia nitrogen and part total phosphorus in decarburization BAF; (8) decarburization BAF water outlet gravity flow enters into denitrogenation BAF, and denitrogenation BAF adopts steel and concrete structure, and hydraulic detention time is 0.45h, built-in ceramics filling, packing material size is 3 ~ 5mm, removes ammonia nitrogen further, most ammonia-nitrogen is converted into nitrate in denitrogenation BAF; (9) denitrogenation BAF water outlet gravity flow enters in coagulation and filtration system, by adding Dephosphorization reagent PAC, removes total phosphorus and suspended substance further; (10) water outlet of coagulation and filtration system is by detecting qualified discharge through Bashel scale tank after disinfection by chlorine dioxide.
BC biochemical reactor built-in biological filler, biologic packing material adopts pencil filler, and material is PP and vinylon, and filler diameter is 80mm, and filling surface amasss as 400m
2/ m
3, biofilm weight is that in 4.2kg/m, BC biochemical reactor, filler arranges that density is 80%, and filler arrangement pitch is 200mm; BC biochemical reactor adds genus bacillus in initial start stage, and dosage is 5000kg, and the genus bacillus of utilization mainly comprises Bacillus licheniformis, causticity bacillus, Bacillus sphaericus, bacillus polymyxa, Bacillus macerans; BC biochemical reactor continues to add microorganism promotor in operational process, and dosage is 0.6mL/kgBOD; Decarburization BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.4, and denitrogenation BAF water part is back to the import of BC biochemical reactor, and reflux ratio is 0.8, and total reflux ratio is 1.2; Before decarburization BAF and denitrogenation BAF backwash water are pumped into coarse rack after backwash tank is collected.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a BC-BAF municipal wastewater treatment process, is characterized in that, implementation comprises the steps:
(1) sewage collects through pipe network, retains large volume pollutent by coarse rack;
(2) coarse rack water outlet flows into sewage lifting pump sump, then is promoted to fine fack from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and small volume pollutent;
(3) fine fack water outlet flows into settling pit, and the dense medium in water precipitates and is separated by settling pit;
(4) settling pit water outlet flows into preliminary sedimentation tank, and in preliminary sedimentation tank, remove suspended substance further, the mode also by adding chemical agent removes part total phosphorus;
(5) fiber, hair and other the tiny suspended substances that suspend in water are removed in preliminary sedimentation tank water outlet by ultra-fine grid;
(6) ultra-fine grid water outlet gravity flow enters BC biochemical reactor, mixes, and add microorganism promotor at the former water of BC biochemical reactor ingress and the BAF sewage that refluxes;
(7) BC biochemical reactor water outlet gravity flow enters into decarburization BAF, removes majority of organic pollutants, part ammonia nitrogen and part total phosphorus in decarburization BAF;
(8) decarburization BAF water outlet gravity flow enters into denitrogenation BAF, removes ammonia nitrogen further, most ammonia-nitrogen is converted into nitrate in denitrogenation BAF;
(9) denitrogenation BAF water outlet gravity flow enters in coagulation and filtration system, by adding Dephosphorization reagent, can remove total phosphorus and suspended substance further;
(10) water outlet of coagulation and filtration system is by detecting qualified discharge through scale tank after sterilization.
2. a kind of BC-BAF municipal wastewater treatment process according to claim 1, is characterized in that, described BC biochemical reactor built-in biological filler, biologic packing material adopts pencil filler, material is PP and vinylon, and filler diameter is 40 ~ 100mm, and packing specific area is 400 ~ 800m
2/ m
3, biofilm weight is 2 ~ 5kg/m, and in described BC biochemical reactor, filler arranges that density is 40% ~ 80%, and filler arrangement pitch is 50 ~ 250mm.
3. a kind of BC-BAF municipal wastewater treatment process according to claim 1, it is characterized in that, described BC biochemical reactor adds genus bacillus in initial start stage, and the genus bacillus utilized in this technique mainly comprises Bacillus licheniformis, causticity bacillus, Bacillus sphaericus, bacillus polymyxa, Bacillus macerans.
4. a kind of BC-BAF municipal wastewater treatment process according to claim 1, it is characterized in that, described BC biochemical reactor continues to add described microorganism promotor in operational process, described microorganism promotor is major ingredient by veterinary antibiotics, mineral substance is that auxiliary material carries out fermentation and forms under certain envrionment temperature, and dosage is 0.2 ~ 1.2mL/kgBOD.
5. a kind of BC-BAF municipal wastewater treatment process according to claim 1, it is characterized in that, described decarburization BAF water part is back to the import of described BC biochemical reactor, reflux ratio is 0.2 ~ 0.5, described denitrogenation BAF water part is back to the import of described BC biochemical reactor, and reflux ratio is 0.5 ~ 1.0.
6. a kind of BC-BAF municipal wastewater treatment process according to claim 1, it is characterized in that, before described decarburization BAF and described denitrogenation BAF backwash water are pumped into described coarse rack after backwash tank is collected, containing a large amount of genus bacillus in excess sludge, bacillus fits nitrogen and thioflavin bacterial classification, can by nitrogen in sewage and element sulphur and oxidized before the material absorbing of the state such as ammonia, ammonia salt, hydrogen sulfide, eliminate foul smell and produce composition, the object of deodorizing can be reached.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108328783A (en) * | 2017-12-29 | 2018-07-27 | 简阳市沱江环保生化有限责任公司 | A kind of community scenery sewage-treatment plant |
| CN108457178A (en) * | 2018-04-12 | 2018-08-28 | 广州市市政工程设计研究总院 | A kind of environmentally friendly collection and purification system of across rivers bridge floor sewage/wastewaters |
-
2015
- 2015-10-21 CN CN201510681608.XA patent/CN105152496A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108328783A (en) * | 2017-12-29 | 2018-07-27 | 简阳市沱江环保生化有限责任公司 | A kind of community scenery sewage-treatment plant |
| CN108457178A (en) * | 2018-04-12 | 2018-08-28 | 广州市市政工程设计研究总院 | A kind of environmentally friendly collection and purification system of across rivers bridge floor sewage/wastewaters |
| CN108457178B (en) * | 2018-04-12 | 2024-02-27 | 广州市市政工程设计研究总院有限公司 | Environmental protection collection and purification system for river bridge deck sewage/wastewater |
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