CN105967269B - A kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water - Google Patents

A kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water Download PDF

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Publication number
CN105967269B
CN105967269B CN201610353681.9A CN201610353681A CN105967269B CN 105967269 B CN105967269 B CN 105967269B CN 201610353681 A CN201610353681 A CN 201610353681A CN 105967269 B CN105967269 B CN 105967269B
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water
intensity
zooplankter
sand filter
sized
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CN105967269A (en
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林涛
陈卫
缪刚
张佳男
谭怡雯
王帅
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Suzhou Water Supply Co ltd
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Hohai University HHU
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physical Water Treatments (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses a kind of minimizing technologies of the medium-and-large-sized Magna class zooplankter of drinking water, operating process is as follows: arranging blue-ray light in the top of water factory's sand filter water surface, the radiation intensity of blue light is not less than 600lux at the water surface, so that Daphnia magna in the case where filtering velocity is no more than 9m/h can light source direction on the water surface it is mobile and be enriched at the water surface, recycle filter tank water rush backwash process generation on Daphnia magna class zooplankter from the water surface to water flow that will accumulate near be discharged outside pond by way of backwash draining.This method is high to the removal efficiency of Daphnia magna class zooplankter, easy to operate, securely and reliably, and without adding chemical agent, will not generate by-product.

Description

A kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water
Technical field
The invention belongs to water treatment field, processing more particularly to a kind of medium-and-large-sized Magna class of drinking water for being related to drinking water are floating The minimizing technology of travelling object.
Background technique
In recent years, Daphnia magna (Daphnia magna) class zooplankter is in water source, especially mistake in eutrophication water Degree is bred, and is entered in water treatment procedure with raw water.Common process cannot completely remove the medium-and-large-sized Magna class zooplankter of water, large-scale Magna class zooplankter can penetrate sand filter, and living body can occur in water after filter and water distribution system.Daphnia magna class is swum dynamic Object naked eyes are as it can be seen that seriously affect the sensory properties of water；Meanwhile Daphnia magna class zooplankter can be used as microorganism carrier, to water Matter causes potential security threat.Therefore, Daphnia magna class zooplankter is effectively removed in drinking water treatment, and drinking water is pacified It is of great significance entirely.
Currently, the method that zooplankter is removed in domestic common drinking water treatment technique have oxidizing process, enhanced coagulation method, Dry pool technology etc..When removing zooplankter using oxidizing process, to completely remove zooplankter, need using higher oxidant agent Amount, this leads to no matter can all by-product be caused to increase in pre-oxidation or sterilization process；To affect the water quality of drinking water, Cause unnecessary security risk.
In addition, enhanced coagulation is directed to dosing coagulant in water source and controls certain pH value, to improve conventional treatment The removal effect of middle natural organic matter.Due to the motility of zooplankter, the effect of enhanced coagulation removal zooplankter is difficult to protect Card.Dry pool technology will cause cut off the water the underproduction and effect it is undesirable.
It can be seen that the reinforcing of common process and control technology optimization do not ensure that completely removing for zooplankter.In addition, grinding Study carefully the protection shown by zooplankter, the microorganism carried has stronger anti-disinfecting power, causes to make to swim dynamic The sterilization dose of object inactivation can not kill the microorganism of its carrying completely, to cause more water quality biological safety problems. Therefore, need to be sought a kind of more effective safer control method.
Summary of the invention
The technical issues of solution: in order to overcome in the prior art common process to Daphnia magna class zooplankter removal effect not Good, the defects of effluent quality safety is not high, complex process, the present invention provides a kind of medium-and-large-sized Magna class zooplankters of drinking water Minimizing technology.
A kind of technical solution: minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water comprising the steps of:
(1) arrange that blue-ray light, the wavelength of the blue-ray light are 460nm~470nm above sand filter；
(2) influent turbidity and organic concentration in sand filter are controlled, wherein influent turbidity≤3NTU, organic concentration, With CODMnMeter ,≤3mg/L；
(3) control filter cycle is in 12~36h, filtering velocity≤9m/h of sand filter；
(4) blue-ray light is opened when sand filter filters, the sand filter water surface is irradiated, the radiation intensity of blue light at the water surface >=600lux, so that Daphnia magna class zooplankter is mobile to water surface light source direction and is gathered at the water surface；
(5) floating to the Daphnia magna class for being gathered in the water surface using the water punching in backwash process when filter tank is backwashed Travelling object is removed, flushing process are as follows: is first carried out water and is rushed 45~60s, water rushes 10~12L/ of intensity (m2S), recoil is utilized The Daphnia magna class zooplankter for being gathered in the water surface is removed to water flow on caused by washing, so that being gathered in the large size of the water surface Magna class zooplankter is discharged into rhone with backwashing wastewater and is emitted into sewage conduct；Then 1~2min is carried out gas, Air blasting intensity is 13~17L/ (m2·s)；Air water rinses 3~4min simultaneously again, and air blasting intensity is 13~17L/ (m2S), water rushes 3~4L/ of intensity (m2·s)；Last water rinses 5~8min, and it is 5~8L/ (m that water, which rushes intensity,2·s)；Whole surface sweep washing, surface Sweeping and washing intensity is 1.4~2.3L/ (m2·s)。
Preferably, step (1) sand filter is V-type filter tank, and blue-ray light is set to above the V-type sand filter water surface at 1m, and quantity is 12, and be evenly arranged.
Preferably, in the sand filter of step (2), influent turbidity is 1NTU~3NTU, with CODMnMeter, organic concentration are 1mg/L~3mg/L.
Preferably, it is filtered for 24 hours in step (4), and the filtering velocity of sand filter is 6m/h~9m/h.
Preferably, the radiation intensity of blue light is 600lux~1000lux at the water surface in step (3).
Preferably, flushing process is that first water rushes 60s in step (5), and intensity is 10L/ (m2·s)；Then it carries out gas 2min, air blasting intensity are 14L/ (m2·s)；Air water rinses 3min simultaneously again, and air blasting intensity is 14L/ (m2S), water rushes intensity 4L/(m2·s)；Last water rinses 6min, and it is 6L/ (m that water, which rushes intensity,2·s)；Whole surface sweep washing, surface sweep washing intensity are 2L/ (m2·s)。
The utility model has the advantages that (1) operation of the present invention process is simple, securely and reliably, can guarantee in sand filter water outlet without Daphnia magna Class zooplankter；(2) filtering velocity≤9m/h of radiation intensity >=600lux of blue light or sand filter at the water surface of the present invention, or water inlet Turbidity≤3NTU or organic concentration, with CODMnMeter, when≤3mg/L, can ensure that Daphnia magna class zooplankter is removed completely； (3) present invention is high to the removal efficiency of Daphnia magna class zooplankter, easy to operate, securely and reliably, and without adding chemical agent, By-product will not be generated.
Detailed description of the invention
Fig. 1 is the floor plan of V-type sand filter；
Fig. 2 is the A-A sectional view of V-type sand filter；
Fig. 3 is V-type sand filter B-B sectional view；
Wherein, 1 is blue-ray light, and 2 be rhone, and 3 be backwash tube.
Specific embodiment
Following embodiment further illustrates the contents of the present invention, but should not be construed as limiting the invention.Without departing substantially from In the case where spirit of that invention and essence, to modification made by the method for the present invention, step or condition and replaces, belong to the present invention Range.Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
The present embodiment is discharged the control of medium-and-large-sized Magna class zooplankter using the V-type sand filter of Jiangsu water factory as sand filter Application study.As described in Figure 1, V-type sand filter includes blue-ray light 1, rhone 2 and backwash tube 3, and wherein blue-ray light 1 is set to V-type Above the sand filter water surface at 1m, quantity is 12；The rhone 2 is set to V-type sand filter bottom center, and backwash tube 3 is set to In rhone 2, the planar dimension of V-type sand filter is 10m × 12m.
Filter tank influent turbidity is 3NTU, organic concentration, with CODMnMeter is 3mg/L, makes filtering velocity by regulating water inlet valve For 9m/h.V-type sand filter is backwashed using water pump, and the filter period is for 24 hours, when filter tank reaches washing time, first to carry out The water of 60s rushes backwash, and it is 10L/ (m that water, which rushes intensity,2S), zooplankter is removed, then starts backwashing procedures again.It rinses Mode rushes 2min using first gas, and air blasting intensity is 14L/ (m2·s)；Air water rinses 3min, air blasting intensity 14L/ simultaneously again (m2S), water rushes intensity 4L/ (m2·s)；Last water rinses 6min, and it is 6L/ (m that water, which rushes intensity,2·s)；Whole surface sweep washing, table It is 2L/ (m that face, which sweeps and washes intensity,2·s).Using wave-length coverage in the blue-ray light 1 of 460nm~470nm, easy to implement, blue light is considered Lamp 1 is 1m away from water surface distance, guarantees at liquid level that (the present embodiment minimum strength is blue ray radiation intensity not less than 600lux 603lux), it determines that 1 quantity of blue-ray light is 12, and is evenly arranged.
It filters sand filter filtered water inlet and the water outlet of 20L respectively using 30 μm of zooplankter strainer, swim in water Animal sampling, and detected.
It is inverted strainer, with the water sample containing zooplankter is obtained after distilled water flushing strainer, brings water sample into laboratory, it is dense The fixed zooplankter of appropriate formaldehyde is added after being reduced to 50mL, content of formaldehyde 4%, the water sample after fixation, which is transferred to diameter, is In the culture dish of 9cm, the quantity of Daphnia magna class zooplankter is counted under 40 times of Stereo microscopes.
This example carries out 4 groups of tests altogether, and test data is averaged, and the results are shown in Table 1.
The comparison of the medium-and-large-sized Magna removal effect of 1 embodiment of table 1
Wherein, "-" representative is not detected；Control group is the filter tank that do not irradiated using blue-ray light 1, remaining parameter is all the same.
From table 1 as it can be seen that operation of the present invention process is simple, securely and reliably, can guarantee in sand filter water outlet without Daphnia magna Class zooplankter.
Embodiment 2
The difference from embodiment 1 is that influent turbidity in sand filter is respectively set to 1~2NTU, 2~2.5NTU, 2.5 ~3NTU, 3~3.5NTU, 3.5~4NTU, test data are averaged, and the results are shown in Table 2.
The different influent turbidities of table 2 compare Daphnia magna removal effect
Experimental group It intakes (a/L) It is discharged (a/L) Daphnia magna removal rate (%)
1~2NTU 29 - 100
2~2.5NTU 30 - 100
2.5~3NTU 31 - 100
3~3.5NTU 25 3 88
3.5~4NTU 26 5 80.8
As seen from Table 2, when influent turbidity is in 3NTU or less, Daphnia magna class zooplankter removal effect is best.
Embodiment 3
The difference from embodiment 1 is that by sand filter entering organic matter of water concentration, with CODMnMeter, be divided into following 5 groups: 1~ 2mg/L, 2~2.5mg/L, 2.5~3mg/L, 3~3.5mg/L, 3.5~4mg/L, test data are averaged, and the results are shown in Table 3.
3 entering organic matter of water content of table compares Daphnia magna removal effect
Experimental group It intakes (a/L) It is discharged (a/L) Daphnia magna removal rate (%)
1~2.0mg/L 28 - 100
2~2.5mg/L 27 - 100
2.5~3mg/L 29 - 100
3~3.5mg/L 26 2 92.3
3.5~4mg/L 27 4 85.2
As seen from Table 3, when sand filter entering organic matter of water concentration is (with CODMnMeter) be greater than 3mg/L when, Daphnia magna cannot get Full removal, so entering organic matter of water concentration need to be controlled (with CODMnMeter) in 3mg/L or less.
Embodiment 4
The difference from embodiment 1 is that regulating water inlet valve, control sand filter filtering velocity be respectively 6m/h, 7m/h, 8m/h, 9m/h, 9.5m/h, 10m/h, test data are averaged, and the results are shown in Table 4.
The different filtering velocitys of table 4 compare Daphnia magna removal effect
Experimental group It intakes (a/L) It is discharged (a/L) Daphnia magna removal rate (%)
6m/h 29 - 100
7m/h 27 - 100
8m/h 26 - 100
9m/h 31 - 100
9.5m/h 29 2 93.1
10m/h 30 4 86.7
As seen from Table 4, when filtering velocity is greater than 9m/h, Daphnia magna cannot be completely removed, so filtering velocity need to be controlled in 9m/ H or less.
Embodiment 5
The difference from embodiment 1 is that control blue-ray light 1 the water surface minimized radiation intensity be 400lux, 500lux, 600lux, 800lux, 1000lux, test data are averaged, and the results are shown in Table 5.
5 different illumination intensity of table compares Daphnia magna removal effect
Experimental group It intakes (a/L) It is discharged (a/L) Daphnia magna removal rate (%)
400lux 26 6 76.9
500lux 33 5 84.8
600lux 31 - 100
800lux 26 - 100
1000lux 28 - 100
As seen from Table 5, when being not less than 600lux using water surface intensity of illumination, Daphnia magna can be removed completely.

Claims (5)

1. a kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water, which is characterized in that comprise the steps of:
(1) blue-ray light (1) is arranged above sand filter, the wavelength of the blue-ray light (1) is 460nm~470nm；
(2) influent turbidity and organic concentration in sand filter are controlled, wherein influent turbidity≤3NTU, organic concentration, with CODMnMeter ,≤3mg/L；
(3) control filter cycle is in 12~36h, filtering velocity≤9m/h of sand filter；
(4) blue-ray light (1) is opened when sand filter filters, the sand filter water surface is irradiated, the radiation intensity of blue light at the water surface >=600lux, so that Daphnia magna class zooplankter is mobile to water surface light source direction and is gathered at the water surface；
(5) it when filter tank is backwashed, is swum using the water punching in backwash process to the Daphnia magna class for being gathered in the water surface dynamic Object is removed, flushing process are as follows: is first carried out water and is rushed 45~60s, water rushes 10~12L/ of intensity (m2S), removal is gathered in water The Daphnia magna class zooplankter in face；Then 1~2min is carried out gas, air blasting intensity is 13~17L/ (m2·s)；Air water is simultaneously again 3~4min is rinsed, air blasting intensity is 13~17L/ (m2S), water rushes 3~4L/ of intensity (m2·s)；Last water rinses 5~8min, It is 5~8L/ (m that water, which rushes intensity,2·s)；Whole surface sweep washing, surface sweep washing intensity are 1.4~2.3L/ (m2·s)。
2. a kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water according to claim 1, which is characterized in that step Suddenly in the sand filter of (2), influent turbidity is 1NTU~3NTU, with CODMnMeter, organic concentration are 1mg/L~3mg/L.
3. a kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water according to claim 1, which is characterized in that step Suddenly it is filtered for 24 hours in (3), and the filtering velocity of sand filter is 6m/h~9m/h.
4. a kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water according to claim 1, which is characterized in that step Suddenly the radiation intensity of blue light is 600lux~1000lux at the water surface in (4).
5. a kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water according to claim 1, which is characterized in that step Suddenly flushing process is that first water rushes 60s in (5), and intensity is 10L/ (m2·s)；Then 2min, air blasting intensity 14L/ are carried out gas (m2·s)；Air water rinses 3min simultaneously again, and air blasting intensity is 14L/ (m2S), water rushes intensity 4L/ (m2·s)；Last water rinses 6min, it is 6L/ (m that water, which rushes intensity,2·s)；Whole surface sweep washing, surface sweep washing intensity are 2L/ (m2·s)。
CN201610353681.9A 2016-05-25 2016-05-25 A kind of minimizing technology of the medium-and-large-sized Magna class zooplankter of drinking water Active CN105967269B (en)

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CN107094721B (en) * 2017-07-10 2021-01-26 广东民信科技发展有限公司 Wild large native daphnia magna enrichment device and enrichment method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001269669A (en) * 2000-03-28 2001-10-02 Fuji Electric Co Ltd Method and device for water treatment using sand filter
CN102502987A (en) * 2011-10-27 2012-06-20 西安建筑科技大学 ClO2 oxidation/sand filtration ClO2 oxidation/sand filtration synergic control method for aquatic organism pollution in waterworks
CN103723789A (en) * 2013-12-17 2014-04-16 河海大学 Method for removing cyclop type zooplanktons during treatment of drinking water
CN203999031U (en) * 2013-12-29 2014-12-10 黑龙江工程学院 A kind of for removing the physical removal device of water source Cyclops of Zooplankton

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001269669A (en) * 2000-03-28 2001-10-02 Fuji Electric Co Ltd Method and device for water treatment using sand filter
CN102502987A (en) * 2011-10-27 2012-06-20 西安建筑科技大学 ClO2 oxidation/sand filtration ClO2 oxidation/sand filtration synergic control method for aquatic organism pollution in waterworks
CN103723789A (en) * 2013-12-17 2014-04-16 河海大学 Method for removing cyclop type zooplanktons during treatment of drinking water
CN203999031U (en) * 2013-12-29 2014-12-10 黑龙江工程学院 A kind of for removing the physical removal device of water source Cyclops of Zooplankton

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Effective date of registration: 20190423

Address after: No. 1100 Renmin Road, Suzhou City, Jiangsu Province

Patentee after: SUZHOU WATER SUPPLY CO.,LTD.

Address before: 211100 No. 8 fo Cheng Xi Road, Jiangning Development Zone, Nanjing, Jiangsu.

Patentee before: HOHAI University