CN103058358B - Biological filter capable of improving sewage interception capacity of down-flow biological filter - Google Patents
Biological filter capable of improving sewage interception capacity of down-flow biological filter Download PDFInfo
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- CN103058358B CN103058358B CN201310033111.8A CN201310033111A CN103058358B CN 103058358 B CN103058358 B CN 103058358B CN 201310033111 A CN201310033111 A CN 201310033111A CN 103058358 B CN103058358 B CN 103058358B
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- 239000010865 sewage Substances 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000706 filtrate Substances 0.000 claims description 15
- 238000011001 backwashing Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 11
- 239000010802 sludge Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 abstract 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000013618 particulate matter Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明涉及一种提高下向流生物滤池截污容量的生物滤池，包括滤池体、进水管道、滤料层、集水区及出水井，进水管道设在滤池体的上部，滤料层设置在滤池体内，集水区设在滤料层的下方，出水井设在滤池体的侧部并与集水区连通，还包括三根自上而下依次连接在出水井上的出水管道。本发明通过对生物滤池出水井管道的出水高度加以调节，使生物滤池中的水位始终维持在高水位附近，运行过程中滤料层中承受的水压力最大，从而能够将更多表层截留的颗粒物、生物污泥推往滤料深层，充分发挥滤料的深层截污效能，延长滤池的过滤周期，节约反冲洗水量，减少反冲洗污泥产量，降低运行成本。
The invention relates to a biological filter for improving the sewage interception capacity of the downward flow biological filter, which comprises a filter body, a water inlet pipe, a filter material layer, a water collection area and a water outlet well, and the water inlet pipe is arranged on the upper part of the filter body , the filter material layer is set in the filter body, the water collection area is set under the filter material layer, the water outlet well is set on the side of the filter body and communicates with the water collection area, and it also includes three sequentially connected on the water outlet well from top to bottom of the water outlet pipe. The present invention adjusts the water outlet height of the outlet well pipeline of the biological filter, so that the water level in the biological filter is always maintained near the high water level, and the water pressure in the filter layer is the largest during operation, so that more surface layers can be intercepted The particulate matter and biological sludge are pushed to the deep layer of the filter material, giving full play to the deep interception efficiency of the filter material, prolonging the filtration cycle of the filter tank, saving backwash water, reducing backwash sludge production, and reducing operating costs.
Description
Technical field
The invention belongs to environmental project technical field of sewage, especially relate to a kind of biofilter of improving Downward-flow biofilter retaining power.
Background technology
At present, water environment pollution and shortage of water resources have become the subject matter of the further sustainable development of restriction Chinese national economy, have caused showing great attention to of various circles of society.Biofilter is a kind of Novel sewage biologic treating technique with simple and easy, efficient and low consumption feature, is one of the study hotspot in Sewage Biological Treatment field in recent years.This technology have stable effluent quality, treatment effeciency high, process that the water yield is large, floor space is little, compact equipment, convenient operation and management, be easy to realize automatic control, the feature such as applied widely.Be widely used at present municipal sewage treatment, the processing of community life sewage and the pretreatment of reuse, Industrial Wastewater Treatment and micro-polluted source water of China, become just gradually one of a kind of important technological means in China's Sewage Biological Treatment field.
The water (flow) direction of biofilter is divided into upward flow and lower to two kinds of forms of stream, refer to into the water filter material layer of flowing through from top to bottom to stream down, apposition growth microbial population in filter material layer completes holding back and degraded to dissolubility pollutant in water inlet suspension and microorganism in water inlet in filter material layer.Because suspension is to be all often just trapped on top layer, pollutant major part is also to degrade on upper strata, impel microorganism at upper strata Fast-propagation, so in filter process, filtrate upper strata resistance increment is very fast, in the time reaching the filtration resistance limit value of setting, the dirty usefulness of cutting of lower floor's filtrate does not also often reach good performance.In view of this, under this operational mode, the dirty usefulness of cutting of lower floor's filtrate does not reach good performance, will be because the limit value that overall filtering layer reaches resistance carries out backwash, the dirty usefulness of cutting of lower floor's filtrate is not fully utilized on the one hand, on the other hand again can be because backwash causes the operation energy consumption of system to increase frequently, producing water ratio reduces, backwashing sludge output is large, operation usefulness is unstable.
Summary of the invention
Object of the present invention is exactly to provide a kind of biofilter of improving filtrate deep layer retaining power in order to overcome the defect that above-mentioned prior art exists, and extends the filter cycle, improves producing water ratio, reduces system operation energy consumption.
Object of the present invention can be achieved through the following technical solutions:
A kind of biofilter of improving Downward-flow biofilter retaining power, comprise filter tank body, inlet channel, filter material layer, gathering ground and wet well, inlet channel is located at the top of filter tank body, described filter material layer is arranged in the body of filter tank, described gathering ground is located at the below of filter material layer, described wet well is located at the sidepiece of filter tank body and is communicated with gathering ground, also comprises three outlet conduits that are connected in turn on wet well from top to bottom.
As preferred embodiment, on three outlet conduits, be respectively arranged with high-order outlet pipe valve, meta outlet pipe valve, low level outlet pipe valve, three outlet conduit ends are aggregated into an outlet pipe.
As preferred embodiment, the vertical separation between three outlet conduits is 400mm.
As preferred embodiment, gathering ground is also connected with backwash water inlet pipe and backwash air inlet pipe.
As preferred embodiment, the top of filter tank body is also provided with backwash water leg and backwashing water is collected canal, and backwashing water is collected canal and is communicated with backwash drainpipe.
By being set, three highly different outlet conduits substitute traditional water outlet regulating weir (delivery port keeps permanent water level), when filter tank brings into operation, process the water bed of material after filtration from top to bottom, outlet conduit by bottom enters wet well, the water outlet when water level of wet well is increased to first outlet conduit, enters subsequent treatment structures.Now, in filter tank, liquid level, in higher level (setting near of recoil liquid level limit value), can give the hydraulic pressure that filtering layer is higher, and the pollutant that hold back on top layer, under higher water pressure pushing, advances to filtrate deep layer place gradually; When filtering layer resistance rising 400mm (liquid level rising 400mm in filter tank), open the outlet conduit valve of the second height, the water level in wet well reduces 400mm, and the 400mm that also can thereupon decline of the liquid level in filter tank, maintains near original water level; The continuation of filter tank resistance increases thereupon, and water level continues to rise, and when after filter tank water level rising 400mm, opens the outlet conduit valve of wet well third high degree, wet well water level decline 400mm, and the 400mm that can decline again of the water level in filter tank, continues filter process.As the filter tank water level 400mm that again rises, while reaching liquid level limit value, now start and send out a cleaning procedure, start the cleaning process of filtrate.
As preferred embodiment, the material of high-order outlet pipe valve, meta outlet pipe valve, low level outlet pipe valve is steel, and diameter valve is 100mm.
As preferred embodiment, filter tank body adopts armored concrete to build by laying bricks or stones.
As preferred embodiment, the filtrate of light filling haydite in filter material layer.
As preferred embodiment, the particle diameter of light ceramic is 6-9mm.
Compared with prior art, the present invention can make filter material layer under higher hydraulic pressure state, work all the time, the pollutant of holding back in filtering layer can successively move toward filtering layer depths, thereby makes the deep layer filtrate that thickness is higher bring into play a section dirty effect, instead of only brings into play the dirty effect of cutting of top layer filtrate.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure, 1 is filter tank body, and 2 is inlet channel, 3 is filter material layer, and 4 is gathering ground, and 5 is wet well, 6 is high-order outlet pipe valve, and 7 is meta outlet pipe valve, and 8 is low level outlet pipe valve, 9 is outlet pipe, 10 is backwash water inlet pipe, and 11 is backwash air inlet pipe, and 12 is backwash water leg, 13 collect canal for backwashing water, and 14 is backwash drainpipe.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Improve a biofilter for Downward-flow biofilter retaining power, its structure as shown in Figure 1, mainly comprises filter tank body 1, inlet channel 2, filter material layer 3, gathering ground 4, wet well 5, high-order outlet pipe valve 6, meta outlet pipe valve 7, low level outlet pipe valve 8, outlet pipe 9, backwash water inlet pipe 10, backwash air inlet pipe 11, backwash water leg 12, backwashing water is collected canal 13, backwash drainpipe 14.
In running, raw water is entered filter tank 1 by inlet channel 2, and the former water filter material layer 3 of flowing through from top to bottom, comes together in gathering ground 4, enters wet well 5 by water distribution tracery wall, when sump 5 middle water levels are increased to high-order outlet pipe, opens high-order outlet pipe valve 6 water outlets; Along with the prolongation of running time, the water level in biofilter 1 raises gradually, when lift-off value reaches 400mm, opens 7 water outlets of meta outlet pipe valve, now wet well middle water level decline 400mm, and the water level in filter tank 1 400mm that also can thereupon decline, filtration is proceeded; Along with the prolongation of running time, the 400mm that again raises of the water level in biofilter 1, now opens 8 water outlets of low level outlet pipe valve, wet well middle water level decline 400mm, and the water level in filter tank 1 400mm that again thereupon declines, filtration is proceeded.Along with the prolongation of filtration time, the water level in filter tank 1 400mm that again raise, now, finish a filter cycle, need to carry out filter back washing.By the outlet conduit of three differing heights is set, can make filter material layer 3 under higher hydraulic pressure state, work all the time, the pollutant of holding back in filter material layer 3 can successively move toward the depths of filter material layer 3, thereby make the deep layer filtrate that thickness is higher bring into play a section dirty effect, instead of only bring into play the dirty effect of cutting of top layer filtrate.
In backwash process, adopt combined water and air backwash mode, close low level outlet pipe valve 8, water inlet pipe valve, open the valve of backwash water pipe 10 and backwash tracheae 11, carry out backwash, backwashing water enters in backwash water leg 12, and import backwashing water and collect canal 13, then by backwash drainpipe 14 discharge systems.
In the Yuhuang Mount pretreatment water factory of Hangzhou, set up under lattice to stream denitrification bio-filter, adopt armored concrete to build by laying bricks or stones.Biofilter single lattice planar dimension 3x4m, height 5.2m; Filtrate adopts light ceramic, and particle diameter is 6-9mm, and thickness of filter bed is 2m; Gathering ground, bottom height is 0.8m; Wet well is of a size of 1x1m, is highly 5.2m; Inlet channel is steel pipe, and diameter is 100mm; A high position, meta, three outlet conduits of low level are steel pipe, and diameter is 100mm, and valve is DN100, and the height difference of three outlet conduits is 400mm.
Of the present inventionly in the Yuhuang Mount pre-treatment plant of Hangzhou, contrast and move 1 year to stream denitrification bio-filter to the lower of stream denitrification bio-filter device and an other lattice same size down, to COD, TN, the average removal rate of SS is respectively 23%, 72%, and 82%; 25%, 70%, 83%; The backwashing period of the two is respectively 2 days and 1.5 days.Can find out, the two is close to the clearance of COD, SS and TN, and of the present inventionly the denitrification bio-filter cycle of operation has extended 1/3 to stream down, has reduced backwash number of times, backwashing sludge output and operating cost, has good environment and economy benefit.
Claims (7)
1. one kind is improved the biofilter of Downward-flow biofilter retaining power, comprise filter tank body (1), inlet channel (2), filter material layer (3), gathering ground (4) and wet well (5), described inlet channel (2) is located at the top of filter tank body (1), described filter material layer (3) is arranged in filter tank body (1), described gathering ground (4) is located at the below of filter material layer (3), described wet well (5) is located at the sidepiece of filter tank body (1) and is communicated with gathering ground (4), it is characterized in that, also comprise three outlet conduits that are connected in turn on wet well (5) from top to bottom, on three outlet conduits, be respectively arranged with high-order outlet pipe valve (6), meta outlet pipe valve (7), low level outlet pipe valve (8), three outlet conduit ends are aggregated into an outlet pipe (9), vertical separation between three outlet conduits is 400mm.
2. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 1, it is characterized in that, the material of described high-order outlet pipe valve (6), meta outlet pipe valve (7), low level outlet pipe valve (8) is steel, and diameter valve is 100mm.
3. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 1, is characterized in that, described filter tank body (1) adopts armored concrete to build by laying bricks or stones.
4. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 1, is characterized in that, the filtrate of light filling haydite in described filter material layer (3).
5. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 4, is characterized in that, the particle diameter of described light ceramic is 6-9mm.
6. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 1, is characterized in that, described gathering ground (4) is also connected with backwash water inlet pipe (10) and backwash air inlet pipe (11).
7. a kind of biofilter of improving Downward-flow biofilter retaining power according to claim 1, it is characterized in that, the top of described filter tank body (1) is also provided with backwash water leg (12) and backwashing water is collected canal (13), and described backwashing water is collected canal (13) and is communicated with backwash drainpipe (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310033111.8A CN103058358B (en) | 2013-01-29 | 2013-01-29 | Biological filter capable of improving sewage interception capacity of down-flow biological filter |
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| CN201310033111.8A CN103058358B (en) | 2013-01-29 | 2013-01-29 | Biological filter capable of improving sewage interception capacity of down-flow biological filter |
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| CN103058358A CN103058358A (en) | 2013-04-24 |
| CN103058358B true CN103058358B (en) | 2014-06-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105621606A (en) * | 2016-03-02 | 2016-06-01 | 上海交通大学 | Novel denitrification biological filter with light filtering material |
| CN108392865A (en) * | 2018-04-12 | 2018-08-14 | 华东师范大学 | End based on the existing Storm Sewer Network in residential block cuts dirty separator and cuts dirty method |
| CN109081442A (en) * | 2018-10-29 | 2018-12-25 | 上海溪昌环境工程有限公司 | A kind of light filter material high-efficient biological reactor |
| CN111252888A (en) * | 2020-02-17 | 2020-06-09 | 上源环工生态环境科技(苏州)有限公司 | Biomembrane light filter device |
| CN112499758A (en) * | 2020-08-25 | 2021-03-16 | 中清生态环境(宁波)有限公司 | Back flush system of fixed bed denitrification biological filter of downflow |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201930588U (en) * | 2010-10-25 | 2011-08-17 | 湖北中碧环保科技有限公司 | Drawer-type filtering device for water treatment |
| CN202099163U (en) * | 2011-05-26 | 2012-01-04 | 上海交通大学 | Combined layering biological filter for sewage treatment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201930588U (en) * | 2010-10-25 | 2011-08-17 | 湖北中碧环保科技有限公司 | Drawer-type filtering device for water treatment |
| CN202099163U (en) * | 2011-05-26 | 2012-01-04 | 上海交通大学 | Combined layering biological filter for sewage treatment |
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