CN101892702A - Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof - Google Patents

Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof Download PDF

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Publication number
CN101892702A
CN101892702A CN2010102457371A CN201010245737A CN101892702A CN 101892702 A CN101892702 A CN 101892702A CN 2010102457371 A CN2010102457371 A CN 2010102457371A CN 201010245737 A CN201010245737 A CN 201010245737A CN 101892702 A CN101892702 A CN 101892702A
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China
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layer
soil
water
gravel
early
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CN2010102457371A
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Chinese (zh)
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CN101892702B (en
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楼紫阳
朱南文
聂俊英
沈后起
袁海平
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上海交通大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108Rainwater harvesting

Abstract

The invention provides an onsite processing process for discarding initial rainwater in a heavy rain without occupying area, belonging to the technical field of environmental engineering. The invention discloses an onsite processing device for the discarding initial rainwater in the heavy rain without occupying area, which comprises a water inlet mechanism, a soil covering layer, a mixed layer, a soil layer, a gravel layer, a fine sand layer, a foundation layer and a draining mechanism, wherein the soil covering layer, the mixed layer, the soil layer, the gravel layer, the fine sand layer and the foundation layer are arranged in sequence from top to bottom; and the water inlet mechanism is connected with the mixed layer; and the draining mechanism is connected with the gravel layer and the fine sand layer. By the invention, the discarded initial rainwater in the heavy rain can reach the grade I discharge standard of the Discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) and GB/T 18920-2002 reuse of recycling water for urban and water quality standard for urban miscellaneous water consumption, and the blockage problem of the groove processing system can be effectively prevented.

Description

The rainstorm process early-stage rainwater stream abandoning does not have and takes up an area for the treatment of apparatus and processing method thereof on the spot
Technical field
The present invention relates to a kind of devices and methods therefor of technical field of waste water processing, specifically is that a kind of rainstorm process early-stage rainwater stream abandoning does not have occupation of land and handles on the spot and processing method.
Background technology
The at present a lot of cities of China are owing to the combined system reason, make rainwater enter the sewerage treatment pipeline, this subject matter wherein bringing is that the quantity of sand and mud in the sewage is very high, had a strong impact on the final processing of sewage plant sludge, and had serious abrasive action for plant equipment of aqueduct and mud etc.Simultaneously, propelling along with China's energy-saving and emission-reduction, the middle water reuse of carrying out that requirement is tried one's best for rainwater, and early-stage rainwater is owing to carried a large amount of silt and pollutant, handle if mix with the later stage rainwater, then can have a strong impact on water reuse purpose in the rainwater wherein, and increase rainwater processing load.Therefore, be necessary very much early-stage rainwater shunted and throw aside, or handle separately.
The waterproof area in city, the increase as roof, street, parking lot etc. makes suitable watershed be covered by fluid-tight hardened surface, therefore causes rain (snow) water directly to permeate the ground, and has increased the flow of surface flow.Simultaneously, urbanization has caused the decline of rainfall runoff water quality to the influence of city hydrological environment, its reason is that mainly urbanization is based on the purpose that rainfall runoff is drained as early as possible to the transformation of drainage system, the increase of rainfall runoff flow velocity and flow, make runoff significantly increase to the souring on roof, road surface, the pollutant of city underlying surface deposition is dissolved by rainwater or carries the diffusion that pollutes; Because China's overwhelming majority urban sewerage and drainage system adopts combined system, rainfall runoff enters sewage network, has increased the load of treatment facility.If can realize the utilization of rainwater, will effectively solve the municipal sewage treatment load.And wherein the most key be the efficient processing target of realizing municipal sewage initial Split-flow water, thereby can directly use after the later stage rainwater is collected, so then can effectively reduce the treating capacity of rainwater.
The use of rainwater also can be used as other water such as air conditioning cooling water, water for fire, car washing water, flowers and plants pouring, landscape water, road cleaning etc. except can be used as lavatory, street wash water, purposes is wider.The research of China's Application of Urban Rain Water and application start from the eighties in 20th century, are developed the nineties." building and sub-district rainwater utilization engineering legislation " implemented on April 1st, 2007 plays positive impetus to Application of Urban Rain Water.The processing procedure of rainwater is similar to general water treatment procedure at present, mainly adopts physico-chemical process.
Find through literature search prior art, Chinese patent notice of authorization number for CN101220603 (day for announcing: patent specification 2008.07.16) has disclosed following content: provide a kind of in water reuse and rainwater sewage separation centralized processor, comprise the coarse filtration sedimentation basin, the biochemical treatment tank that contains the sewage decomposing pool, Buffer Pool that is communicated with coarse filtration sedimentation basin and biochemical treatment tank and the fine filtering pond that contains movable filter bed that is communicated with Buffer Pool respectively, middle water handling reclamation control room, middle water water storage pond, in the middle water handling reclamation control room central operator is arranged, the ultra-filtration and separation machine that is communicated with the fine filtering pond of acceptor center control panel control, concentrated sewage well by pipeline respectively with biochemical treatment tank, the coarse filtration sedimentation basin, Buffer Pool, the fine filtering pond is communicated with.Both solve the shunting of sewage rainwater and focused on problem, obtained regenerated water again.This patent technological process is longer, and needs the long time of staying.The technical problem to be solved in the present invention is: rainstorm process early-stage rainwater stream abandoning sewage, its sand content is higher, and contains the complicated pollutant of Chuck Steak, water reuse standard in satisfying after this technology is disposed.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of rainstorm process early-stage rainwater stream abandoning not have occupation of land and handle on the spot and processing method.The initial Split-flow rainwater is through entering the grit chamber precipitation behind the flow abandoning apparatus, after enter the water intake mechanism water distribution, carry out the soil processing from flowing into the sewage clarification soil ditch, pass through special construction, solve the soil method blockage problem of disposing of sewage, can make the initial stage throw aside rainwater and reach first discharge standard (GB18918-2002) in " urban wastewater treatment firm pollutant emission standard ", and can effectively prevent locking system generation blocking problem.
The present invention realizes by following technical scheme:
The rainstorm process early-stage rainwater stream abandoning that the present invention relates to does not have occupation of land to be handled on the spot, comprise: water intake mechanism, overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer, basal layer and drainage mechanism, wherein: overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer and basal layer from top to bottom set gradually, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with layer of gravel and fine sand layer.
Described water intake mechanism comprises: intake pool, several distribution channels, wherein: the intake pool outlet is connected with distribution channel, distribution channel is arranged in the mixed layer, rely on flow by gravity to enter in the groove early-stage rainwater, the distribution channel width is 200mm, it lays the quantity basis: calculate perpendicular transverse width, the transverse width of every 1.5m is provided with a groove.
Described drainage mechanism comprises: header, reservoir, suction pump, and wherein: an end of header places layer of gravel and fine sand layer, and the other end is connected with the reservoir of built-in suction pump; Suction pump is arranged in the reservoir.
The rainstorm process early-stage rainwater stream abandoning that the present invention relates to does not have and takes up an area of processing method on the spot, may further comprise the steps:
The first step in selected position, comprises the green area on subdistrict greening district and road traffic next door, the excavation grit chamber, and add more than the argillic horizon 0.6m bottom, and compacting.After water enters grit chamber sand setting a period of time, remove part grains of sand material.
Second step, the grit chamber water outlet enters sewage treatment system on the spot, sewage treatment system on the spot wherein, comprise: water intake mechanism, overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer, basal layer and drainage mechanism, wherein: overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer and basal layer from top to bottom set gradually, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with layer of gravel and fine sand layer.
The 3rd step, the position of selecting, the green area that comprises subdistrict greening district and road traffic next door, the trench cell body, add more than the argillic horizon 0.6m bottom, and compacting, lays fine sand layer and layer of gravel then up successively, and at bottom laying header, and header laid to the water outlet direction with 5 ‰ the gradient, and make it connect reservoir, suction pump is set in the reservoir is used for discharging and handles water;
Described groove body its degree of depth when not comprising overburden layer is 700-900mm, and area is 2.5Q-5Qm 2What wherein, Q was is the day processing water yield of unit with the cubic meter.
The 4th step, above the soil horizon of groove body with the mounting and fixing support of wooden grid as biologic packing material, then biologic packing material is suspended on the latticed fixed mount, make the biologic packing material vertical hanging and contact with the layer of gravel of groove body in the lower end.
The 5th step, with the soil of excavation from top to bottom progressively in the impouring cell body, until soil add to reach the soil horizon thickness of 450-500mm after can satisfying compacting after, the biologic packing material that is suspended on the fixed mount is cut along the soil plane, the grid fixed mount is removed, tamp soil horizon then, guarantee the rigidity of rainwater purification soil ditch structure.
The 6th step, lay mixed layer on soil horizon, and along the water inlet direction mixed layer is tilted to the collecting well direction by 5 ‰ the gradient, distribution channel is arranged on the mixed layer front end, utilizes mixed layer to system's uniform water distribution.Add overburden layer at last on mixed layer, overburden layer thickness also should remain on more than the 100mm, thereby can satisfy demand of plant growth.Early-stage rainwater is through sewage on the spot after the treatment system, qualified discharge.
In the step 4, described biologic packing material is that TPO and polyamide constitute, and structure is a class test-tube brush hairbrush shape, and described biologic packing material design addition is determined in the following manner:
Soil permeability coefficient in soil horizon is less than 10 -6During cm/s, the biologic packing material loading density is that every cubic metre of soil evenly loads surface area and is no less than 40m 2Filler;
Soil permeability coefficient in soil horizon is 10 -5-10 -6During cm/s, the biologic packing material loading density is that evenly to load surface area be 20-40m to every cube of soil 2Filler;
Soil permeability coefficient in soil horizon is greater than 10 -5During cm/s, the biologic packing material loading density is that evenly to load surface area be 10-20m to every cubic metre of soil 2Filler.
Compared with the prior art, the present invention has following advantage: (1) need not sneak into media such as sandstone and iron filings adopting normal soil to do in the system of soil ditch medium in soil; (2) through after removing pretreated early-stage rainwaters such as the grains of sand and entering this system, the system jams problem can not appear because soil property changes, utilize the water guide performance of the commercially available brush shape biologic packing material of TPO and polyamide material formation, make the permeability of soil improve greatly, broken away from of the dependence of traditional soil ditch, enlarged the territorial scope that early-stage rainwater and sewage clarification soil ditch use the soil type selecting; (3) can bear bigger hydraulic load, when hydraulic load during up to 20-40cm/d, initial stage rain sewage still can reach first discharge standard (GB18918-2002) and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality in " urban wastewater treatment firm pollutant emission standard " through after this system handles; (4) do not take floor area, keep the greening on ground and other, as demands such as parking lots.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the biologic packing material scheme of installation.
The specific embodiment
Below embodiments of the invention are elaborated, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
One, the rainstorm process early-stage rainwater stream abandoning is not had takes up an area of the embodiment for the treatment of apparatus on the spot
As shown in Figure 1, present embodiment comprises: water intake mechanism, overburden layer 1, mixed layer 2, soil horizon 3, layer of gravel 4, fine sand layer 5, basal layer 6 and drainage mechanism, wherein: overburden layer 1, mixed layer 2, soil horizon 3, layer of gravel 4, fine sand layer 5 and basal layer 6 from top to bottom set gradually, water intake mechanism is connected with mixed layer 3, and drainage mechanism is connected with layer of gravel 4 and fine sand layer 5.
Described water intake mechanism comprises: intake pool 7, several distribution channels 8, wherein: the intake pool outlet is connected with distribution channel, distribution channel is arranged in the mixed layer, rely on flow by gravity to enter in the groove early-stage rainwater, the distribution channel width is 200mm, it lays quantity: calculate perpendicular transverse width, the transverse width of every 1.5m is provided with a groove.
Described drainage mechanism comprises: header 9, reservoir 10, suction pump 11, and wherein: an end of header places layer of gravel and fine sand layer, and the other end is connected with the reservoir of built-in suction pump; Suction pump is arranged in the reservoir.
Described overburden layer 1 comprises: face of land hardened layer or vegetable layer, and overburden layer thickness also should remain on more than the 100mm;
Described mixed layer 2 is that 1: 1 gravel and coarse sand mixes by volume ratio, and its thickness is 100-150mm, wherein: gravel particle diameter 6-10mm, coarse sand diameter 0.5-2.0mm;
Described soil horizon 3 thickness are 350-500mm, are made of soil that excavates out and biologic packing material;
Described layer of gravel 4 thickness are 50-100mm, are made of the gravel of 6-10mm
Described fine sand layer 5 thickness are 100-150mm, are made of the fine sand of 0.5-1.0mm;
Described basal layer 6 is an argillic horizon, and thickness>0.6mm is as the basic supporting layer of technology disposal.
As shown in Figure 2, the installation process of biologic packing material needs latticed fixed mount A in the soil horizon, is mainly used in the soil ditch building process edaphic biologic packing material is fixed.Biologic packing material B is suspended on the fixed mount, and soil is inserted by the space in fixed mount and the biologic packing material.When soil add to reach the soil horizon thickness of 450-500mm after can satisfying compacting after, biologic packing material is separated with fixed mount, remove fixed mount, biologic packing material relies on the interior friction of soil to be fixed in the soil horizon.
Be illustrated in figure 3 as edaphic work schematic diagram, biologic packing material plays the water guide effect, has increased vertical water permeability of soil, make effluent stream to be mainly vertical gravity current, increase soil permeability, thereby avoided that blockage problem takes place in the disposal process.
Two, following examples are not taken up an area of the performance of processing method on the spot for the rainstorm process early-stage rainwater stream abandoning is had
Embodiment 1
Get that transmission coefficient is 6.2 * 10 in the sub-district, county, Chongming, Shanghai City -4The soil of cm/s, making up one is 10m by filling surface area in every cubic metre of soil 2The rainwater purification soil ditch of biologic packing material, the gash depth when not comprising overburden layer is 700mm, and the degree of depth of groove is 800mm behind the earthing, and area is 2.0m 2, the Design Treatment water yield is 0.3-0.9m 3/ d, promptly hydraulic load is 15-45cm/d.The soil ditch for purifying of building an identical size that does not have a biologic packing material simultaneously as a comparison.The artificial distribution tests in the experimental rig of batching.
Water inlet COD CrFor 50.4-180.6mg/L, SS are that 18-52mg/L, total phosphorus are that 1.9-2.7mg/L, ammonia nitrogen are that 13.4-38.7mg/L, pH are 5.8-6.5, batch in the experimental rig with the hydraulic load of 40cm/d, through behind the device, the COD of water outlet CrBe 11.1-27.8mg/L, SS is 5.5-7.1mg/L, and total phosphorus is 0.05-0.06mg/L, and ammonia nitrogen is 4.5-5.1mg/L, and the water outlet effect has reached municipal sewage plant's one-level A standard and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality.
Embodiment 2
Getting the interior transmission coefficient of certain university campus is 2.9 * 10 -7The soil of cm/s, making up one is 20m by filling surface area in every cubic metre of soil 2The early-stage rainwater stream abandoning process for purifying of biologic packing material.Gash depth when not comprising overburden layer is 700mm, and the degree of depth of groove is 800mm behind the earthing, and area is 2m 2, the Design Treatment water yield is 0.4-0.8m 3/ d, promptly hydraulic load is 20-40cm/d.The soil ditch for purifying domestic wastewater of building a same size that does not have a biologic packing material simultaneously as a comparison.The early-stage rainwater of simulated roadway is tested in the experimental rig of batching.
Water inlet simulated roadway runoff: COD is 186-312mg/L, SS is 25-106mg/L, total phosphorus is 0.4-1.3mg/L, ammonia nitrogen is 1.6-4.9mg/L, total nitrogen is 2.3-7.4mg/L, and pH is 5.3-6.5, batches in two soil ditch with the hydraulic load of 40cm/d, after the soil ditch processing of having loaded biologic packing material, the COD of water outlet CrBe 18.2-32.8mg/L, SS is 3.2-6.3mg/L, total phosphorus is 0.03-0.11mg/L, ammonia nitrogen is 7.6-9.7mg/L, total nitrogen is 15.6-18.5mg/L, water outlet has reached municipal sewage plant's one-level B standard and GB/T 18920-2002 urban sewage reutilization city miscellaneous water water quality, moves 3 years continuously, blockage problem do not occur.And,, promptly stop up, occur the problem that sewage can not ooze down after 16 days though can reach identical wastewater purifying efficiency through after the soil ditch processing of not loading biologic packing material.

Claims (6)

1. a rainstorm process early-stage rainwater stream abandoning does not have and takes up an area for the treatment of apparatus on the spot, it is characterized in that, the rainstorm process early-stage rainwater stream abandoning that the present invention relates to does not have occupation of land to be handled on the spot, comprise: water intake mechanism, overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer, basal layer and drainage mechanism, wherein: overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer and basal layer from top to bottom set gradually, water intake mechanism is connected with mixed layer, and drainage mechanism is connected with layer of gravel and fine sand layer.
2. rainstorm process early-stage rainwater stream abandoning according to claim 1 does not have and takes up an area for the treatment of apparatus on the spot, it is characterized in that, described water intake mechanism comprises: intake pool, several distribution channels, wherein: the intake pool outlet is connected with distribution channel, distribution channel is arranged in the mixed layer, relies on flow by gravity to enter in the groove early-stage rainwater, and the distribution channel width is 200mm, it lays quantity: calculate perpendicular transverse width, the transverse width of every 1.5m is provided with a groove.
3. rainstorm process early-stage rainwater stream abandoning according to claim 1 does not have and takes up an area for the treatment of apparatus on the spot, it is characterized in that, described drainage mechanism comprises: header, reservoir, suction pump, wherein: an end of header places layer of gravel and fine sand layer, and the other end is connected with the reservoir of built-in suction pump; Suction pump is arranged in the reservoir.
4. a rainstorm process early-stage rainwater stream abandoning does not have and takes up an area of the processing method for the treatment of apparatus on the spot, it is characterized in that, may further comprise the steps:
The first step in selected position, comprises the green area on subdistrict greening district and road traffic next door, the excavation grit chamber, and add more than the argillic horizon 0.6m bottom, and compacting, after water enters grit chamber sand setting a period of time, removes part grains of sand material;
Second the step, the grit chamber water outlet enter sewage on the spot overburden layer, mixed layer, soil horizon, layer of gravel, fine sand layer and the basal layer for the treatment of apparatus from top to bottom set gradually, water intake mechanism is connected with mixed layer, drainage mechanism is connected with layer of gravel and fine sand layer;
The 3rd step, the position of selecting, the green area that comprises subdistrict greening district and road traffic next door, the trench cell body, add more than the argillic horizon 0.6m bottom, and compacting, lays fine sand layer and layer of gravel then up successively, and at bottom laying header, and header laid to the water outlet direction with 5 ‰ the gradient, and make it connect reservoir, suction pump is set in the reservoir is used for discharging and handles water;
The 4th step, above the soil horizon of groove body with the mounting and fixing support of wooden grid as biologic packing material, then biologic packing material is suspended on the latticed fixed mount, make the biologic packing material vertical hanging and contact with the layer of gravel of groove body in the lower end;
The 5th step, with the soil of excavation from top to bottom progressively in the impouring cell body, until soil add to reach the soil horizon thickness of 450-500mm after can satisfying compacting after, the biologic packing material that is suspended on the fixed mount is cut along the soil plane, the grid fixed mount is removed, tamp soil horizon then, guarantee the rigidity of rainwater purification soil ditch structure;
The 6th goes on foot, lays mixed layer on soil horizon, and mixed layer is tilted to the collecting well direction by 5 ‰ the gradient along the water inlet direction, distribution channel is arranged on the mixed layer front end, utilize mixed layer to system's uniform water distribution, add overburden layer at last on mixed layer, overburden layer thickness also should remain on more than the 100mm, thereby can satisfy demand of plant growth, early-stage rainwater is through sewage on the spot after the treatment system, qualified discharge.
5. rainstorm process early-stage rainwater stream abandoning according to claim 4 does not have occupation of land processing method on the spot, it is characterized in that, in the step 4, described biologic packing material is that TPO and polyamide constitute, and addition is determined in the following manner:
Soil permeability coefficient in soil horizon is less than 10 -6During cm/s, the biologic packing material loading density is that every cubic metre of soil evenly loads surface area and is no less than 40m 2Filler;
Soil permeability coefficient in soil horizon is 10 -5-10 -6During cm/s, the biologic packing material loading density is that evenly to load surface area be 20-40m to every cube of soil 2Filler;
Soil permeability coefficient in soil horizon is greater than 10 -5During cm/s, the biologic packing material loading density is that evenly to load surface area be 10-20m to every cubic metre of soil 2Filler.
6. rainstorm process early-stage rainwater stream abandoning according to claim 4 does not have occupation of land processing method on the spot, it is characterized in that, the groove body degree of depth described in the 3rd step is 700-900mm, and area is 2.5Q-5Qm 2What wherein, Q was is the day processing water yield of unit with the cubic meter.
CN2010102457371A 2010-08-05 2010-08-05 Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof CN101892702B (en)

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