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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Abstract
The invention relates to a biological filter capable of improving the sewage interception capacity of a down-flow biological filter. The biological filter comprises a filter body, a water inlet pipeline, a filter material layer, a catchment area and a water-producing well, wherein the water inlet pipeline is arranged on the upper part of the filter body; the filter material layer is arranged in the filter body; the catchment area is arranged below the filter material layer; and the water-producing well is arranged on one side of the filter body and is communicated with the catchment area. The biological filter also comprises three water outlet pipelines which are connected to the water-producing well from top to bottom in sequence. By adopting the biological filter, the water producing height of the pipelines of the water-producing well of the biological filter is adjusted to ensure that the water level in the biological filter is always kept nearby a high water level, and the water pressure received by the filter material layer during operation is the maximum, so that more surface layer intercepted particles and biological sludge can be pushed to a deep layer of a filter material to bring the deep layer sewage interception efficiency of the filter material into full play, the filter cycle of the filter is prolonged, the back flushing water amount is reduced, the back flushing sludge yield is reduced, and the running cost is reduced.
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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| CN103058358B true CN103058358B (en) | 2014-06-25 |
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Families Citing this family (4)
| 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 |
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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