CN1285515C - Artificial rapid diafiltration sewage treating system - Google Patents
Artificial rapid diafiltration sewage treating system Download PDFInfo
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- CN1285515C CN1285515C CN 200410073951 CN200410073951A CN1285515C CN 1285515 C CN1285515 C CN 1285515C CN 200410073951 CN200410073951 CN 200410073951 CN 200410073951 A CN200410073951 A CN 200410073951A CN 1285515 C CN1285515 C CN 1285515C
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- 239000010865 sewage Substances 0.000 title claims abstract description 57
- 238000011026 diafiltration Methods 0.000 title claims abstract description 19
- 239000000945 filler Substances 0.000 claims abstract description 58
- 238000001914 filtration Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000004576 sand Substances 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000004062 sedimentation Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000009736 wetting Methods 0.000 claims abstract description 5
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 239000011707 mineral Substances 0.000 claims abstract description 4
- 239000010457 zeolite Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- -1 bed thickness 1.2m Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 1
- 239000004579 marble Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000010802 sludge Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000002689 soil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000006065 biodegradation reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000005325 percolation Methods 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Abstract
The present invention discloses an artificial rapid diafiltration sewage treating system which comprises a retainer tank, a preliminary sedimentation tank and a rapid filtration tank, wherein artificial filtering materials artificially prepared are filled in the rapid filtration tank. The artificial filtering materials are prepared by mixing general fillers with certain grain composition with special fillers according to a volume ratio of 9 to 1, and the general fillers are natural sand; the special fillers comprises three kinds of natural minerals of marble sand or limestone sand, zeolite sand and magnetite ore sand according to a volume ratio of 90: 8: 2. The rapid filtration tank adopts an operating mode of the alternation of drying and wetting to carry out sewage treatment, and the period of hydraulic load is short; water distribution is carried out for four times within 24 hours of a day, and water distribution is kept for 15 to 20 minutes each time, namely water flooding and drying are carried out frequently. The hydraulic load of the CRI system is generally from 1.0 to 1.5 m/d (m<3>/m<2>. d), and about 0.8<2>/m<3>. d of land occupation areas are required for treating each square of sewage. The CRI system has the advantages of no limitation from fields, broad application ranges, less construction investment, low management cost, high hydraulic load, convenient operation and easy management.
Description
Technical field
The present invention relates to a kind of Sewage treatment systems, promptly artificial rapid diafiltration (Constructed RapidInfiltration) Sewage treatment systems is called for short " manpower rapid-infiltration system " or " CRI system ".
Background technology
Traditional rapid diafiltration sewage treating system (Rapid Infiltration system is called for short " RI system ") is a kind of of polluted water land treatment technology.The natural sand soil that it selects good penetrability for use is oozing sewage cloth on the pond soon as oozing the place, pond soon, produces complicated physics, chemistry and biological action when oozing soil layer under the sewage sewage is purified.The RI system realizes that the principle of sewage disposal is: utilize the natural sand soil as oozing the pond soon, by the drive manner that oozes the pond alternation of wetting and drying soon sewage is handled.Sewage hockets mutually oozing in the pond waterflooding soon and fall to doing process, a waterflooding and once to fall dried be a hydraulic load cycle, the hydraulic load cycle is important operating parameters of RI system, and the RI system makes effluent characteristics reach optimum effect by adjusting the hydraulic load cycle.
The advantage that the RI system is outstanding is: it is to utilize the natural sand soil of good penetrability to carry out sewage disposal as oozing the pond soon, so construction investment economizes, running expense is low, and is easy to operate, be easy to management, effluent quality is better than conventional activated sludge process B-grade sewage treatment system.
The defective that the RI system is outstanding is:
(1) strictly is subjected to the site condition restriction, do not have the natural sand soil of good penetrability just can not form the RI system, just can not adopt the RI technology to carry out sewage disposal.
(2) because the infiltrative nonuniformity in natural sand soil so hydraulic load is low, generally has only 0.3-0.4m/d (m
3/ m
2D).
(3) system's floor space is big, and handling every side's sewage floor space is 2.5-3.3m
2/ m
3D.
Though the RI system has very outstanding advantage, under the national conditions that China has a large population and a few land, its outstanding scarce filling seriously hampers its widespread use.
At present, the large, medium and small city B-grade sewage treatment systems that are similar to the conventional activated sludge method that adopt more.Its shortcoming is: construction investment is big, the working cost height.
Summary of the invention
Be subjected in order to solve the RI system that restriction range of application in place is narrow, floor space is big, hydraulic load is low, and problems such as conventional activated sludge process B-grade sewage treatment system construction investment is big, running cost height, the purpose of this invention is to provide that a kind of construction investment is few, overhead charges are low, hydraulic load is high, easy to operate, the artificial rapid diafiltration sewage treating system device that is easy to manage, i.e. CRI system and device.
For achieving the above object, the present invention by the following technical solutions: a kind of artificial rapid diafiltration sewage treating system device, it is by barrier pond, preliminary sedimentation tank and ooze the pond soon and form; It is characterized in that:
The described Artificial filtering material that is filled with human configuration in the pond that oozes soon, this kind Artificial filtering material are to be that 9: 1 mixed forms by volume by the general filler of particle level and particular fillers;
Described general filler is a natural sand; Described particular fillers is to be that 90: 8: 2 mixed form by volume by Dali stone sand or limestone sand, zeolite sand and three kinds of natural mineral of magnetic sand.
The described pond of oozing soon adopts the drive manner of alternation of wetting and drying to carry out sewage disposal, and the hydraulic load cycle is very short, and water distribution is 4 times in promptly one day 24 hours, and each water distribution 15-20 minute, promptly frequent waterflooding frequently fell dried.
The described pond of oozing soon is semi-underground type, brick mix structure; The described pool structure that oozes soon divides general structure and strengthens two kinds on nitrogen removal structure.
The pond of oozing soon of described general structure is divided two-layer: the bottom is a bed course, and filling out particle diameter is gravel cobble or the rubble of 30-40mm, bed thickness 0.4m; Bed course top 10cm is an inverted filter, and filler is a pebbles, this layer from top to bottom particle by thin chap; Header is established in the bed course bottom, and every single header that oozes the pond soon links to each other with main discharge pipe, and the sewage after the processing is discharged by total comb; Top layer is a filtering layer, fills out the mixture of general filler and particular fillers, bed thickness 1.2m, and water distributor is established on the filtering layer surface; Ooze the pond pool wall soon and exceed filtering layer surface 0.3m as the protection height, whole total height of oozing the pond soon is 1.9m.
Described reinforcement nitrogen is removed the pond of oozing soon of structure and divided two-layer: the bottom is a bed course, and filling out particle diameter is gravel cobble or the rubble of 30-40mm, bed thickness 0.7m; Bed course top 10cm is an inverted filter, and filler is a pebbles, this layer from top to bottom particle by thin chap; Header is established in bed course bottom, and every single header that oozes the pond soon will be bent to that the 0.65m place is connected with main discharge pipe at the bottom of the pond, and the sewage after the processing enters clean water basin by total comb; Top layer is a filtering layer, fills out the mixture of general filler and particular fillers, bed thickness 1.2m, and water distributor is established on the filtering layer surface; Ooze the pond pool wall soon and exceed filtering layer surface 0.3m, ooze the total height 2.2m in pond soon as the protection height; Do antiseepage at the bottom of the described pond of oozing the pond soon and handle, and also want antiseepage at the periphery of 0.7m at the bottom of the pond.
C in the described general filler
uPercentage composition＜5% of value＜5.0, particle diameter＜0.075mm is qualified filler; Coefficient of permeability K=the HL/R of general filler, wherein, HL is a hydraulic load, and R is a correction factor, and general value is 0.05-0.06.
The artificial rapid diafiltration sewage treating system of the present invention also comprises rapid filter, distribution reservoir and clean water basin; Described rapid filter and distribution reservoir are at described preliminary sedimentation tank and ooze between the pond soon; Described clean water basin are positioned at and describedly ooze after the pond soon;
This rapid filter is divided into two-layer: the upper strata is a filtering layer, and floor height 0.6-0.7m, filtrate are equal grain quartz sand or the Dali stone sand of particle diameter 2mm; Bottom is a bed course, and filler is general gravel cobble or rubble or the pebbles of particle diameter 30-40mm, floor height 0.4m, bed course top 10cm is an inverted filter, filler is a pebbles, this inverted filter from top to bottom particle by thin chap; Be provided with water distributor on the filtering layer surface; The rapid filter pool wall exceeds filtering layer surface 0.3m as the protection height, and the total height of rapid filter is 1.3-1.4m.
The hydraulic load of CRI system and device of the present invention is generally 1.0-1.5m/d (m
3/ m
2D), handle every side's sewage floor space and be about 0.8m
2/ m
3D.CRI of the present invention system is not subjected to place restriction applied range and construction investment is few, overhead charges are low, hydraulic load is high, easy to operate, be easy to management.CRI of the present invention system be applicable to no ice period or ice period short wide geographic area, be applicable to the processing and the advanced treatment of wastewater of contaminated rivers and canals water, municipal effluent and sanitary sewage, treat effluent water quality reaches the relevant ambient quality standard of country fully.
Description of drawings
Fig. 1 is the artificial rapid diafiltration sewage treating system of the present invention (CRI system) plant system drawing
Fig. 2 is a process flow sheet of the present invention
Embodiment
Artificial rapid diafiltration sewage treating system disclosed by the invention (be called for short CRI system) is that the defective at the RI system proposes, and it has carried out great improvement to the RI system.As shown in Figure 1, CRI system and device of the present invention comprises pretreatment unit and main reaction unit.
Pretreatment unit is made up of barrier pond, preliminary sedimentation tank, rapid filter and distribution reservoir, its major function is to make sewage quality homogenizing, sand setting, hold back bigger floating matter and suspended substance, and removal part particle COD (chemical oxygen demand (COD)), prevent the quick obstruction of oozing the pond soon in the main reaction unit, keep oozing soon the stable rate of percolation in pond.
The main reaction unit is for oozing the pond soon.The unitary major function of main reaction is: make the sewage handled through pretreatment unit ooze above the pond from top to bottom the process of diafiltration downwards soon from the main reaction unit, produce comprehensive physics, chemistry and biological respinse, pollutent is removed, wherein mainly be biochemical reaction, it makes organic pollutant remove by biological degradation.
The difference of CRI system of the present invention and traditional RI system is:
1, oozing what fill in the pond in the CRI of the present invention system soon is not natural soil layer, but the Artificial filtering material of human configuration.This kind Artificial filtering material is to be mixed by the natural sand of certain granules level and particular fillers.The application of this kind Artificial filtering material, make CRI of the present invention system can not be subjected to the restriction in place, the processing to sewage also can be realized in the natural sand soil that does not rely on good penetrability, has both guaranteed that higher hydraulic load was arranged simultaneously, can improve treatment effect again, guarantee to satisfy the processing target of water outlet requirement.
In normal course of operation, the pond filter material surface microbial film of growing is oozed soon in the CRI system.Out-of-date when effluent stream, hold back suspended substance and part pollutent in the sewage by absorption and filteration; Simultaneously, because of filter material surface (particularly oozing top, pond filtrate soon) the abundant microbial film of growing, when sewage infiltrate filtrate, the formed microbial film of filter material surface with high-specific surface area carries out fast purification to sewage.The same with the RI system, the CRI system adopts also that waterflooding-the dried operation scheme that alternates falls.It prevents the obstruction that biomembranous quick growth causes, helps the aerobic and anaerobic biodegradation of organic pollutant again.Fall to oozing dry spell that the pond is most of is aerobic environment, it is anaerobic environment that the waterflooding phase is oozed the pond, often is aerobic and anaerobic environment replaces mutually so ooze soon in the pond, and organic pollutant is removed by aerobic biodegradation and anaerobic biodegradation.With regard to nitrogen, produce ammoniumization and nitrification when falling to doing, the waterflooding phase produces denitrification, and nitrogen is removed by above-mentioned conversion process.
2, CRI of the present invention system has also set up the manual rapid infiltration land pond, and its main purpose is to make sewage quality homogenizing, filtering part suspended solids (SS) and particle COD (chemical oxygen demand (COD)), prevents that the main reaction unit from oozing the pond soon and stopping up, and keeps oozing soon the stable rate of percolation in pond.But when handling contaminated rivers and canals water, under the lower situation of water inlet SS, rapid filter in the pre-treatment and distribution reservoir can not established.
As shown in Figure 1, barrier pond, preliminary sedimentation tank, distribution reservoir and the clean water basin in the CRI system and device of the present invention are waste disposal plants of using always, and the present invention does not have special requirement, so be not described in detail in this.Below only to the manual rapid infiltration land pond with ooze the pond soon and set forth.
Rapid filter in the CTI system and device is divided into two-layer: the upper strata is a filtering layer, and floor height 0.6-0.7m, filtrate are equal grain quartz sand or the Dali stone sand of particle diameter 2mm, and the filtering layer surface is provided with water distributor; Bottom is a bed course, and floor height 0.4m, filler are pebbles or rubble or the gravel cobble of particle diameter 30-40mm, in order to reduce the head loss of back flushing, preferably use pebbles.Bed course top 10cm is an inverted filter, and filler is a pebbles, and this inverted filter particle from top to bottom be its objective is that the filtering layer fine particle enters bed course when preventing the back flushing rapid filter and caused obstruction by thin chap (progressively carrying out the transition to 20mm from 3mm).The rapid filter protection highly is 0.3m, total height 1.3-1.4m.
To stream, filtering velocity was generally 40m/d under rapid filter adopted; In order to prevent to stop up, rapid filter is wanted regular back flushing (as shown in Figure 2), and back washing strength is generally 8L/m
2S, backwashing time is generally 5min, and preliminary sedimentation tank is returned in the back flushing water outlet.
Oozing the pond soon is the main reaction unit of CRI system and device of the present invention, also is the core of CRI of the present invention system, and its design is vital to the CRI system.
The whole place of oozing soon can be divided into several by particular case and oozes the pond soon, and each oozes soon, and available brick partition wall separates between the pond; Also can not establish partition wall, but be divided into several with native ridge and ooze the pond oozing pool surface soon.Singlely ooze the designed cloth outlet capacity of neglecting greatly of pond and decide, generally with can make ooze soon the pond fast the cloth full water be principle.
Each oozes the pond soon is semi-underground type, brick mix structure, and ground, visual field particular case is done suitable antiseepage processing at the bottom of the pond.Ooze the pond soon two kinds of structures are arranged: general structure and reinforcement nitrogen are removed structure.
One, general structure oozes the pond soon
Oozing the pond soon divides two-layer up and down.The bottom is a bed course, fills out the bed course filler, floor height 0.4m, and bed course top 10cm is an inverted filter, this inverted filter particle from top to bottom be its objective is that rapid filter filtering layer fine particle enters bed course when preventing back flushing and is caused obstruction by thin chap (progressively carrying out the transition to 20mm from 3mm); Header is established in the bed course bottom, and every single header that oozes the pond soon links to each other with main discharge pipe, and the sewage after the processing enters clean water basin by total comb.Top layer is a filtering layer, fills out general filler and particular fillers, load behind these two kinds of filler thorough mixing, and bed thickness 1.2m, water distributor is established on the filtering layer surface.Ooze the pond pool wall soon and exceed filtering layer surface 0.3m as the protection height.Ooze pond total height 1.9m soon.
Being filled in the bed course filler that oozes soon in the bed course of pond is general rubble or gravel cobble, and particle diameter is generally 30-40mm.
Being filled in the general filler that oozes soon in the filtering layer of pond is natural sand.General filler is that natural sand selected is the analysis by grain composition, measures nonuniformity coefficient C
uValue and the percentage composition of particle diameter＜0.075mm and fixed.C
uPercentage composition＜5% of value＜5.0, particle diameter＜0.075mm are qualified filler.
Ooze pond filtering layer coefficient of permeability K value soon by darcy instrument mensuration.Calculate hydraulic load HL value according to the coefficient of permeability K value with following formula
HL＝K×R (1)
K＝HL/R (2)
In the formula, HL is a hydraulic load, m/d or m
3m
-2D
-1K is permeability coefficient (or rate of percolation), m/d; R is a correction factor, and zero dimension, R value are experience factors, and general value is 0.05-0.06.
Definite as the HL value, available formula (2) calculate the general desired K value of filler.If the K value of selected filler and calculate to such an extent that the K value is roughly suitable with formula (2), then selected filler is qualified filler.General filler accounts for 90% of total filler.
Be filled in the particular fillers that oozes soon in the filtering layer of pond and be made up of Dali stone sand (or limestone sand), zeolite sand and three kinds of natural mineral of magnetic sand, its proportion of composing (volume ratio) is 90: 8: 2.Particular fillers accounts for 10% of total filler.Its grain composition and permeability coefficient require with general filler.During filling, will load behind general filler and the particular fillers thorough mixing.
That two, strengthens that nitrogen removes structure oozes the pond soon
This is the another kind of structure of oozing the pond soon, and it is to use when the treat effluent nitrogen removal efficiency is had relatively high expectations.It with the difference of oozing the pond soon of general structure is: cushion thickness is increased to 0.7m, and total height is increased to 2.2m; Header is established in bed course bottom, but header will be bent to that 0.65m place is connected with main discharge pipe at the bottom of the pond, its objective is zone of saturation of formation in bed course, is beneficial to denitrification; This structure is wanted the antiseepage at the bottom of except that the pond, and the periphery of 0.7m is also wanted antiseepage at the bottom of the pond.Other with general structure to ooze the pond soon identical.
Though be general structure ooze the pond soon, that strengthens still that nitrogen removes structure oozes the pond soon, its floor space by formula (3) is calculated
W＝Q/HL (3)
In the formula, W is for oozing the total floor space of Chi, m soon
2Q is the treatment capacity of every day, m
3/ d; HL is a hydraulic load, m/d.
The suitable HL value scope of CRI system of the present invention generally is 1.0-1.5m/d (m
2/ m
3D), by improving the treatment effect of pre-treatment to SS, the HL value also can be brought up to 2.0m/d (m
2/ m
3D).
The effluent quality of neglecting greatly of HL value requires to decide with the size of disposal field can be provided.In general, effluent quality requires high, and the hydraulic load design load is smaller relatively, to guarantee the effluent quality requirement.But if the site area that is provided is less, then the hydraulic load design load will improve relatively; Hydraulic load improves, and may reduce removal effect, and this problem can solve by changing the hydraulic load cycle.
The pond of oozing soon in the CRI of the present invention system also is the drive manner that adopts alternation of wetting and drying, is promptly oozing in the pond waterflooding soon and is falling to doing mutual replacing.A waterflooding and once to fall dried be a hydraulic load cycle.
The hydraulic load cycle of RI system is very long, and the waterflooding time generally is 1-3 days, and falling to doing the time generally is 4-10 days.The hydraulic load cycle of CRI system is different fully with the hydraulic load cycle of RI system, and the hydraulic load cycle of CRI system is very short, generally is water distribution 4 times in a day 24 hours, and each water distribution 15-20 minute, promptly frequent waterflooding frequently fell dried.The length in hydraulic load cycle looks the influent quality situation and effluent quality requires to do suitable adjustment.Because the hydraulic load of CRI system is than high several times of the hydraulic load of RI system, so the hydraulic load cycle of CRI system makes sure to keep in mind long, long meeting causes penetrating of pollutent, and treatment effect can obviously descend, and water outlet does not reach standard.But the optimum hydraulic load cycle will be determined by concrete debugging and operation.The hydraulic load cycle is the most important operating parameter of CRI system, determines that scientifically and rationally the optimum hydraulic load cycle is this system's key of success.
CRI of the present invention system can be suitable for following situation:
Influent quality:
| COD Cr | BOD 5 | SS | NH 4-N | TP |
| 80-500mg/L | 50-200mg/L | 30-150mg/L | 15-50mg/L | 3.0-5.0mg/L |
The area that is suitable for: the CRI system mainly is applicable to the wide geographic area that no ice period or ice period lack.
The sewage type that is suitable for: it is applicable to the advanced treatment of dispersion treatment, the water treatment of contaminated river course and the B-grade sewage of the focusing on of municipal effluent, samll cities and towns (the especially unsound cities and towns of network of drains) sewage.
CRI of the present invention system compares with traditional RI system, has both kept that the construction investment of traditional RI system is low, running expense is economized, effluent quality is better than conventional second-stage treatment, the easy to operate and advantage that is easy to manage, has overcome the major defect of RI system again:
(1) adopts hand-stuff to improve the hydraulic load of system greatly, overcome the low defective of RI system hydraulic load.The hydraulic load of CRI system is generally 1.0-1.5m/d (m
3/ m
2D), be the RI system 3-5 doubly.
(2) greatly reduce floor space, handle every side's sewage floor space and be about 0.8m
2/ m
3D, only be the RI system 1/4-1/3.
(3) owing to ooze the pond soon and manually construct, maneuverability is not limited by site condition, has overcome fully that the RI system is subjected to the site condition restriction and defective that can not widespread usage.
In addition, CRI of the present invention system compares with the conventional activated sludge method and has the following advantages:
(1) because oozing the pond filler soon, the main reaction unit adopts the natural sand of particle diameter less than 2mm, the surface-area of filter bed is big, sewage can fully contact with the microbial film of particle surface, existing aerobic bacteria also has anerobe in the bed, they are to be fixed on the dominant bacteria of sand grain surface through long-term domestication, so its effluent characteristics generally all is better than the secondary treatment yielding water of conventional activated sludge process.
(2) less investment, Fang Shui invests about 500 yuan/m
3D (not containing fees paid for taking rural land) only is about 1/2 of conventional activated sludge process investment.
(3) economic operating cost, 0.2 yuan/m of the direct running cost of square water
3About, be about 1/3 of conventional activated sludge process.
(4) except that preliminary sedimentation tank produces the mud of minute quantity, do not produce active sludge, save the facility of handling active sludge, expense with and to the influence of environment.
(5) need not second pond.
(6) this system's anti-shock loading is stronger, and water inlet COD concentration reaches as high as 500-600mg/L; System's short-term is out of service very little to the microbiological effect of oozing soon in the pond, even after 3～4 months out of service, just can return to original processing power in 3～5 days, conventional activated sludge process does not have this kind performance, handles so the CRI system is particularly suitable for the unsettled dispersive small-scale sewage of sewage generation.
The experiment proved that, the present invention to contaminated rivers and canals water treatment after, effluent characteristics generally can reach country's " water environment quality standard " V class water quality standard (GB3838-2002), can reach IV class or III class water quality standard (denitrogenate phosphorus outer) sometimes; For municipal effluent and sanitary sewage, handle the back effluent characteristics can reach country's " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) in the standard of primary standard A or B.
Claims (7)
1, a kind of artificial rapid diafiltration sewage treating system device, it is by barrier pond, preliminary sedimentation tank and ooze the pond soon and form; It is characterized in that:
The described Artificial filtering material that is filled with human configuration in the pond that oozes soon, this kind Artificial filtering material are to be that 9: 1 mixed forms by volume by the general filler of particle level and particular fillers;
Described general filler is a natural sand; Described particular fillers is to be that 90: 8: 2 mixed form by volume by Dali stone sand or limestone sand, zeolite sand and three kinds of natural mineral of magnetic sand.
2, artificial rapid diafiltration sewage treating system device according to claim 1, it is characterized in that: the described pond of oozing soon adopts the drive manner of alternation of wetting and drying to carry out sewage disposal, the hydraulic load cycle is: water distribution is 4 times in one day 24 hours, each water distribution 15-20 minute, promptly frequent waterflooding frequently fell dried.
3, artificial rapid diafiltration sewage treating system device according to claim 1 and 2 is characterized in that: the described pond of oozing soon is semi-underground type, brick mix structure; The described pool structure that oozes soon divides general structure and strengthens two kinds on nitrogen removal structure.
4, artificial rapid diafiltration sewage treating system device according to claim 3 is characterized in that: the pond of oozing soon of described general structure is divided two-layer:
The bottom is a bed course, and filling out particle diameter is gravel cobble or the rubble of 30-40mm, bed thickness 0.4m; Bed course top 10cm is an inverted filter, and filler is a pebbles, this layer from top to bottom particle by thin chap; Header is established in the bed course bottom, and every single header that oozes the pond soon links to each other with main discharge pipe, and the sewage after the processing is discharged by total comb;
Top layer is a filtering layer, fills out the mixture of general filler and particular fillers, bed thickness 1.2m, and water distributor is established on the filtering layer surface;
Ooze the pond pool wall soon and exceed filtering layer surface 0.3m as the protection height, whole total height of oozing the pond soon is 1.9m.
5, artificial rapid diafiltration sewage treating system device according to claim 3 is characterized in that: described reinforcement nitrogen is removed the pond of oozing soon of structure and is divided two-layer:
The bottom is a bed course, and filling out particle diameter is gravel cobble or the rubble of 30-40mm, bed thickness 0.7m; Bed course top 10cm is an inverted filter, and filler is a pebbles, this layer from top to bottom particle by thin chap; Header is established in bed course bottom, and every single header that oozes the pond soon will be bent to that the 0.65m place is connected with main discharge pipe at the bottom of the pond, and the sewage after the processing enters clean water basin by total comb;
Top layer is a filtering layer, fills out the mixture of general filler and particular fillers, bed thickness 1.2m, and water distributor is established on the filtering layer surface;
Ooze the pond pool wall soon and exceed filtering layer surface 0.3m, ooze the total height 2.2m in pond soon as the protection height;
Do antiseepage at the bottom of the described pond of oozing the pond soon and handle, and also want antiseepage at the periphery of 0.7m at the bottom of the pond.
6, according to claim 1 or 4 or 5 described artificial rapid diafiltration sewage treating system devices, it is characterized in that: C in the described general filler
uPercentage composition＜5% of value＜5.0, particle diameter＜0.075mm is qualified filler;
Coefficient of permeability K=the HL/R of described general filler, wherein, HL is a hydraulic load, and R is a correction factor, and general value is 0.05-0.06.
7, according to claim 1 or 2 or 4 or 5 described artificial rapid diafiltration sewage treating system devices, it is characterized in that: this artificial rapid diafiltration sewage treating system also comprises rapid filter, distribution reservoir and clean water basin; Described rapid filter and distribution reservoir are at described preliminary sedimentation tank and ooze between the pond soon; Described clean water basin are positioned at and describedly ooze after the pond soon;
This rapid filter is divided into two-layer: the upper strata is a filtering layer, and floor height 0.6-0.7m, filtrate are equal grain quartz sand or the Dali stone sand of particle diameter 2mm;
Bottom is a bed course, and filler is general gravel cobble or rubble or the pebbles of particle diameter 30-40mm, floor height 0.4m, bed course top 10cm is an inverted filter, filler is a pebbles, this inverted filter from top to bottom particle by thin chap;
Be provided with water distributor on the filtering layer surface; The rapid filter pool wall exceeds filtering layer surface 0.3m as the protection height, and the total height of rapid filter is 1.3-1.4m.
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| CN 200410073951 CN1285515C (en) | 2004-09-17 | 2004-09-17 | Artificial rapid diafiltration sewage treating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9423414B2 (en) | 2011-03-30 | 2016-08-23 | Siemens S.A.S. | Method and system for measuring the variation in speed of a moving body |
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| CN101397178B (en) * | 2008-08-14 | 2012-01-11 | 中国地质大学（武汉） | Livestock and poultry raising sewage disposal process and disposal system thereof |
| CN101508507B (en) * | 2009-03-25 | 2010-10-06 | 湖南绿源环保工程有限公司 | Ecological-artificial percolation filtration water treatment system and method for dispersion type domestic wastewater |
| CN101993163A (en) * | 2010-10-14 | 2011-03-30 | 深圳市深港产学研环保工程技术股份有限公司 | Device and method for treating water of micro-polluted water source |
| CN103657174B (en) * | 2012-09-07 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of continuous filter for the moisture solid waste of mummification |
| CN103112997B (en) * | 2013-02-08 | 2015-04-08 | 农业部沼气科学研究所 | High-ammonia nitrogen organic sewage purification treatment system and method |
| CN103910465B (en) * | 2014-01-14 | 2017-08-29 | 卓勒（上海）环境工程有限公司 | A kind of microkinetic saprobia rapid filtration system and technique |
| CN104193084B (en) * | 2014-07-25 | 2016-01-20 | 中国环境科学研究院 | The waste disposal plant of multistage water inlet vertical current Efficiency for Soil Aquifer Treatment and method |
| CN104355407B (en) * | 2014-10-22 | 2017-04-05 | 南京中电环保股份有限公司 | A kind of processing method and processing device of slaughtering wastewater |
| CN105399229A (en) * | 2015-12-03 | 2016-03-16 | 重庆甘泰环保设备有限公司 | Constructed rapid infiltration water treatment device suitable for town domestic wastewater |
| CN105948247B (en) * | 2016-05-25 | 2020-08-25 | 成都理工大学 | Operation method for improving denitrification efficiency of artificial rapid infiltration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9423414B2 (en) | 2011-03-30 | 2016-08-23 | Siemens S.A.S. | Method and system for measuring the variation in speed of a moving body |
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