CN107364952A - A kind of series connection biological aerated filter process for micro-polluted raw pretreatment - Google Patents
A kind of series connection biological aerated filter process for micro-polluted raw pretreatment Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/104—Granular carriers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a kind of series connection biological aerated filter process for micro-polluted raw pretreatment, by water inlet system, two-stage series connection BAF and outlet system form successively, in the two-stage aerated biological filter initial operating stage, biofilm is carried out according to the water water inlet less than design inflow, by adjusting first order BAF and second level BAF operating condition, it is heterotroph to make dominant microflora in the first order BAF, dominant microflora is nitrifier in the second level BAF, the present invention is applied to micro-polluted raw and pre-processed, it can realize that the synchronism stability of organic matter and ammonia nitrogen removes.
Description
Technical field
The present invention relates to a kind of series connection biological aerated filter process for micro-polluted raw pretreatment, belong to drinking water water
Processing technology field.
Background technology
In recent years, being aggravated with the eutrophication of water source raw water, ammonia nitrogen is on the rise with organic concentration excessive problem,
2015《China Environmental State Bulletin》It has been shown that, each primary contamination index of large watershed in the whole nation are COD, the Huanghe valley, pine
More basin ammonia nitrogens such as Hua Jiang basins, Liaohe River Basin are main contamination index.The conventional water treatment technology of water supply plant at present, i.e.,：It is mixed
Solidifying-precipitation-filtering-sterilization, colloid, suspension, bacterium and the impurity being primarily directed in water body, for organic matter and ammonia nitrogen
The higher micro-polluted raw of concentration, the removal ability of common process are poor.Ammonia nitrogen and organic concentration excessive problem are urgently to be resolved hurrily.
At present, the domestic technique commonly used for ammonia nitrogen and the exceeded raw water of organic concentration is to strengthen conventional treatment process and depth
Spend handling process.But all there is the problems such as removal effect is bad or application is narrower in these methods.Strengthen conventional treatment work
Skill economical and effective, but its application has limitation, the larger molecular organicses removal effect that the technology can remove to common process
Preferably, but to ammonia nitrogen, small organic molecule still it is difficult to remove；Advanced treatment process is widely used at present, but its operating cost
It is higher, and have some limitations more.It would therefore be highly desirable to seek a kind of more economical and effective, micro- pollution applied widely original
Water technology.
BAF（Biological Aerated Filter, BAF）It is full by French moral profit in the eighties in last century
Company develops, and the technology has the characteristics that manually to force oxygen supply, separation of solid and liquid filtering, high water-base fluid, periodically backwashed,
There is preferable decarburization nitrification function.Tang Wen peaks et al.（Tang Wenfeng, Hu Youbiao, He Xiaowen, Sun Feng English BAFs biology
Pretreating micro-polluted experiment [J] environmental projects, 2014,32 (09):26-31. [2017-08-20]. DOI：
10.13205/j.hjgc.201409007）The Study on pretreatment of micro-polluted water has been carried out using single biological aerated filter, tested
Show, single biological aerated filter is preferable to CODMn removal effect and more stable（Clearance about 40%-60%）, but ammonia
Nitrogen removal effect is influenceed very greatly by the change of filter tank operating condition, when hydraulic load is in 2-6 m3/（m2•h）In the range of fluctuate
When, ammonia nitrogen removal frank drops to 29.4% by 60.1% rapidly, it is difficult to realizes that the synchronism stability of organic matter and ammonia nitrogen removes.
The patent of application number 201510918527.7 discloses a kind of two-part BAF and its life of processing rural area
The method of sewage living, this method are directed to domestic sewage in rural areas, it is proposed that the technique such as commissioning test of two sections of BAFs is joined
Number.However, in drinking water treatment field, due to the dystrophic water quality characteristic of micro-polluted raw, the high standard of pretreatment effluent quality
Standard, if the existing BAF operating condition applied to high concentrated organic wastewater is directly applied into drinking water treatment neck
Domain, CODMnPrevious level is difficult to hold in ammonia nitrogen removal frank.Therefore, the characteristics of taking into full account micro-polluted raw, develops pin
The series connection BAF operation process strong to property, improves its removal effect to micro-polluted raw, is very necessary.Mesh
Before, there is not been reported for the series connection biological aerated filter process pre-processed for micro-polluted raw.
The content of the invention
It is applied to micro-polluted raw the technical problem to be solved by the invention is to provide one kind to pre-process, it is possible to achieve have
The series connection biological aerated filter process that the synchronism stability of machine thing and ammonia nitrogen removes.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of series connection biological aerated filter process for micro-polluted raw pretreatment, by water inlet system, two-stage series connection aeration life
Thing filter tank and outlet system form successively, in the two-stage aerated biological filter initial operating stage, according to less than design inflow
Water water inlet carry out biofilm, by adjusting first order BAF and second level BAF operating condition,
Dominant microflora is set in the first order BAF to be heterotroph, dominant microflora is in the second level BAF
Nitrifier.
The permanganate index of the micro-polluted raw（CODMn）Not higher than 15mg/L, ammonia nitrogen（In terms of N）Not higher than 10
Mg/L, biodegradability（BOD5/CODcr）Not less than 0.1.
The two-stage aerated biological filter initial operating stage inflow is 50% design inflow, treats second level aeration and biological filter
Pond water outlet CODMnClearance stabilization is more than 40%, ammonia nitrogen removal frank is stable more than 50%, recovers to design inflow to run.
During normal operation, the first order BAF hydraulic load 3-5 m3/（m2•h）, residence time 20-30
Min, gas-water ratio（2-4）：1, gas-water ratio controls is not less than 5 mg/L, institute according to for first order effluent of aeration biological filter dissolved oxygen
State second level BAF hydraulic load 1-3 m3/（m2·h）, residence time 20-30 min, gas-water ratio（0.5-2）：1,
Gas-water ratio controls is not less than 5 mg/L according to for second level effluent of aeration biological filter dissolved oxygen.
First order BAF backwashing period 7-10 days, backwashing procedures：Gas rushes 2-3 min, air water connection
Syzygies 3-5 min, water rush 3-5 min；Tolerance：15-20 L/（m2·s）, water：8-15 L/（m2·s）, the second level exposes
Gas biofilter backwashing period 10-15 days, backwashing procedures：Gas rushes 0.5-1 min, and air water, which is combined, rushes 2-3 min, and water rushes 2-
3 min；Tolerance：10-15 L/（m2·s）, water 5-10 L/（m2·s）.
The two-stage aerated biological filter uses commercially available leca filtrate, particle diameter 3-5 mm, and porosity is not less than
50%。
The beneficial effect that the present invention is reached：When organic matter and ammonia nitrogen are coexisted in same biological treatment system, heterotroph
Stronger to the contention ability of dissolved oxygen and organic matter, huge uptake pollutant carries out metabolism, synthesizes the nutrition needed for itself
Material, shoot up as dominant bacteria, and the specific growth rate for being responsible for the nitrifier of ammonium oxidation is relatively low, the generation cycle is longer,
It is harsher to requirements such as substrate, dissolved oxygen and pH value, competitive disadvantages are in the environment coexisted with heterotroph, are unfavorable for ammonia
The conversion degraded of nitrogen, on this basis, the present invention uses two-stage series connection BAF, in 2 autonomous systems, passes through fortune
The regulation of row operating mode etc., heterotroph in first order BAF is set to grow into dominant microflora, second level BAF
Interior nitrifier grows into dominant microflora, and so as to realize that the synchronism stability of organic matter and ammonia nitrogen removes, the present invention is also short with flow,
Operational management is easy, the characteristics of strong applicability.
Brief description of the drawings
Fig. 1 is present invention process flow chart；
Fig. 2 is COD during biofilm in embodimentMnAnd ammonia nitrogen removal frank result.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
The present embodiment carries out micro-polluted source water pretreating process research using the source water of water factory of Chongqing City as object.
The water factory water source is reservoir water, and CODMn is 5.8-10.1 mg/L, ammonia nitrogen 1.27-1.94 mg/L, and water quality is difficult to reach ground throughout the year
Table quality standard of water environment（GB3838-2002）Group III water quality standard, the water factory is town level water factory, using common process（Coagulation-
Precipitation-filtering-sterilization）, output water permanganate index and ammonia nitrogen are exceeded（GB5749-2006）.Now using proposed by the present invention
Group technology, as shown in figure 1, newly-built two-stage series connection BAF pilot-plant is a set of, water factory's source water is carried out pre-
Treatment research, it is intended to which the water treatment is accessed into the original common process of water factory to after meeting Group III water quality standard.
Two-stage aerated biological filter uses commercially available leca filtrate, particle diameter 3-5 mm, porosity 73%, two-stage filter tank
Upward flow operation process is used, upward flow technique can effectively improve the utilization rate of filler in BAF, delay dirt
Contaminate the cycle.
The pilot-plant designs the m3/h of inflow 2, after pilot-plant is built, to design the 50% of inflow（1 m3/
h）It is passed through micro-polluted raw and carries out biofilm, COD during biofilmMnAnd ammonia nitrogen removal frank is shown in Fig. 2.As shown in Figure 2, in the investigation of 26 days
In phase, CODMnClearance stably reached more than 40% from the 16th day, and ammonia nitrogen removal frank stably reached more than 50% from the 21st day,
It is believed that from the 21st day, filtrate biofilm is basically completed.After probation terminates within 26 days, recover to design inflow to start normally to transport
OK.
During normal operation, the m of first order BAF hydraulic load 53/（m2•h）, the min of residence time 20, air water
Than 4：1, the mg/L of first order effluent of aeration biological filter dissolved oxygen 7.1, the m of second level BAF hydraulic load 23/（m2•
h）, the min of residence time 27, gas-water ratio 1：1, the mg/L of second level effluent of aeration biological filter dissolved oxygen 6.4.
During normal operation, micro-polluted raw pretreating effect is shown in Table 1 to the present embodiment.As it can be seen from table 1 this embodiment party
Formula pretreating effect is good, and effluent of aeration biological filter fully meets water environment quality standard（GB3838-2002）Group III
Water quality standard.
The micro-polluted raw pre-processed results of table 1
| Index | Micro-polluted raw | Effluent of aeration biological filter |
| Turbidity（NTU） | 6.31 | 1.38 |
| Ammonia nitrogen (mg/L) | 1.72 | 0.53 |
| Permanganate index (mg/L) | 8.43 | 3.17 |
| Dissolved oxygen (mg/L) | 8.2 | 6.4 |
| pH | 8.14 | 7.13 |
First order BAF is backwashed after running 7 days, backwashing procedures：Gas rushes 3 min, air water joint punching 5
Min, water rush 5 min；Tolerance：20 L/（m2•s）, water：15 L/（m2•s）, second level BAF backwashing period
12 days, backwashing procedures：Gas rushes 0.5 min, air water joint 2 min of punching, and water rushes 2 min；Tolerance：10 L/（m2•s）, water 5
L/（m2•s）.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment, it is characterized in that, by water inlet system, two-stage
Series connection BAF and outlet system form successively, in the two-stage aerated biological filter initial operating stage, according to less than
The water water inlet for designing inflow carries out biofilm, by adjusting first order BAF and second level BAF
Operating condition, dominant microflora is set in the first order BAF to be heterotroph, in the second level BAF
Dominant microflora is nitrifier.
2. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment according to claim 1, it is special
Sign is the permanganate index of the micro-polluted raw（CODMn）Not higher than 15mg/L, ammonia nitrogen（In terms of N）Not higher than 10 mg/L,
Biodegradability（BOD5/CODcr）Not less than 0.1.
3. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment according to claim 1, it is special
Sign is that the two-stage aerated biological filter initial operating stage inflow is 50% design inflow, treats that second level BAF goes out
Water CODMnClearance stabilization is more than 40%, ammonia nitrogen removal frank is stable more than 50%, recovers to design inflow to run.
4. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment according to claim 1, it is special
Sign is, during normal operation, the first order BAF hydraulic load 3-5 m3/（m2•h）, residence time 20-30
Min, gas-water ratio（2-4）：1, gas-water ratio controls is not less than 5 mg/L, institute according to for first order effluent of aeration biological filter dissolved oxygen
State second level BAF hydraulic load 1-3 m3/（m2·h）, residence time 20-30 min, gas-water ratio（0.5-2）：1,
Gas-water ratio controls is not less than 5 mg/L according to for second level effluent of aeration biological filter dissolved oxygen.
5. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment according to claim 1, it is special
Sign is first order BAF backwashing period 7-10 days, backwashing procedures：Gas rushes 2-3 min, air water joint punching
3-5 min, water rush 3-5 min；Tolerance：15-20 L/（m2·s）, water：8-15 L/（m2·s）, the second level aeration life
10-15 days filter back washing cycle of thing, backwashing procedures：Gas rushes 0.5-1 min, and air water, which is combined, rushes 2-3 min, and water rushes 2-3
min；Tolerance：10-15 L/（m2·s）, water 5-10 L/（m2·s）.
6. a kind of series connection biological aerated filter process for micro-polluted raw pretreatment according to claim 1, it is special
Sign is that the two-stage aerated biological filter uses commercially available leca filtrate, particle diameter 3-5 mm, and porosity is not less than 50%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747511A (en) * | 2020-07-08 | 2020-10-09 | 江西理工大学 | Method and system for synchronously removing ammonia nitrogen and rare earth ion pollution in rare earth mining area |
Citations (3)
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|---|---|---|---|---|
| CN201284265Y (en) * | 2008-06-23 | 2009-08-05 | 华南理工大学 | Double up-flow type aerating biological filter system for micro-polluted raw water processing |
| CN102627353A (en) * | 2012-03-30 | 2012-08-08 | 北京工业大学 | Nitration denitrificatoin and filter method and nitration denitrification and filter device for double-sludge series-connection aeration biofilter |
| CN105366894A (en) * | 2015-12-11 | 2016-03-02 | 南京大学 | Two-stage biological aerated filter and method for processing rural domestic wastewater |
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- 2017-09-05 CN CN201710791088.7A patent/CN107364952A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201284265Y (en) * | 2008-06-23 | 2009-08-05 | 华南理工大学 | Double up-flow type aerating biological filter system for micro-polluted raw water processing |
| CN102627353A (en) * | 2012-03-30 | 2012-08-08 | 北京工业大学 | Nitration denitrificatoin and filter method and nitration denitrification and filter device for double-sludge series-connection aeration biofilter |
| CN105366894A (en) * | 2015-12-11 | 2016-03-02 | 南京大学 | Two-stage biological aerated filter and method for processing rural domestic wastewater |
Non-Patent Citations (1)
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| 杨春平等: "《废水处理原理》", 31 December 2012, 湖南大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747511A (en) * | 2020-07-08 | 2020-10-09 | 江西理工大学 | Method and system for synchronously removing ammonia nitrogen and rare earth ion pollution in rare earth mining area |
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Application publication date: 20171121 |