CN106277683B - A kind of method of contaminated lake pool sediment in-situ control - Google Patents

A kind of method of contaminated lake pool sediment in-situ control Download PDF

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Publication number
CN106277683B
CN106277683B CN201610807791.8A CN201610807791A CN106277683B CN 106277683 B CN106277683 B CN 106277683B CN 201610807791 A CN201610807791 A CN 201610807791A CN 106277683 B CN106277683 B CN 106277683B
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Prior art keywords
bed mud
aeration head
reactor
lake pool
water
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CN106277683A (en
Inventor
冼萍
唐海芳
冯晓娟
黄宇钊
李桃
拜俊岑
梁韩英
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Guangxi University
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Guangxi University
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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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

Abstract

The invention discloses a kind of methods of contaminated lake pool sediment in-situ control, in lake, pond sludge water interface hangs immobilized microorganism device, microporous aeration device includes aeration head and air compressor, aeration head is placed among the microbe carrier of immobilized microorganism device, and air compressor connects aeration head by supply conduit；It is aerated by microporous aeration device, provides dissolved oxygen for bed mud and lake pool water body, while will be in the spreading that bred in immobilized microorganism device to bed mud and lake pool water body.The method of the present invention makes bed mud surface form a thick layer brown oxidation layer, becomes natural screening agent, has both prevented the release of lower layer's pollutants in sediments, plays the role of masking covering；Substrate volume is not will increase again, shallow waters are also suitable；Aquatic environment system is not constituted and endangered, habitat can be provided for microorganism；It is easy to maintain, starting is quick, easy to operate, low energy consumption, does not cause secondary pollution, is easily separated.

Description

A kind of method of contaminated lake pool sediment in-situ control
Technical field
The invention belongs to water environment treatment fields, and in particular to a kind of method of contaminated lake pool sediment in-situ control.
Background technique
With the development of the city with the quickening of process of industrialization, a large amount of waste water are discharged into urban river lake, due to obtaining not To timely and effectively administering, pollutant is largely deposited in bed mud, and after water body environment variation, pollutant releases again in bed mud It is put into overlying water, becomes pollution source.In recent years, it is controlled as external source pollutes, the release of pollutants in sediments becomes The primary pollution source of rivers and lakes influence water quality.Especially in the closed landscape lake pool, the release of deposit nutritive salt, gradually The main reason for as lake pool eutrophication.Research shows that nitrogen and phosphorus in water body mainly come after external source pollutes to obtain control It is discharged derived from deposit, and thus caused lake pool eutrophication can maintain a very long time.Therefore, to Sediments Reparation is the only way for fundamentally solving water eutrophication.
In existing lake pool in-situ sediment remediation technology, there are peripheral doses, such as masking covering, diversion are washed away, the party Method is quick, but can destroy to Benthic ecology system, and limits vulnerable to hydraulics；Chemical remediation, usually to fluvial deposit Chemical agent is added in object, convert (innoxious) or solidifies the polluter in bed mud, to reduce the readily degradable of polluted bed mud Or toxicity and migration.It include mainly redox, passivation etc., this method is quick, but at high cost, and easily causes secondary dirt Dye；It is biological prosthetic, be the sediment pollution control technology being currently concerned, mainly using organism (mainly microorganism and Plant) vital metabolic activity, reduce environment in poisonous and harmful substance concentration or make its completely it is innoxious, thus make its completely It is restored to the process of reset condition.Compared with physics and chemical repair method, biological renovation method has safety, invests small, effect Fruit is good, low energy consumption, does not cause many advantages, such as secondary pollution.However, traditional sediment in-situ biotechnology is to utilize free state Dominant bacteria, that there are bacteria concentrations of effectively degrading in unit volume is low, is easy to run off in fierce water project situation hypothallus, is competing with original inhabitants bacterium The deficiencies of striving in weak tendency place.It is badly in need of a kind of remedying sludge technology that effect is lasting, easy to operate at present.
Immobilized microorganism technique is that microorganism or free cell are fixed on restriction by means physically or chemically In area of space, it is made to keep modern biotechnology that is active and can recycling.The micro- life of concentration is added compared to general The method of object microbial inoculum, the cells are fixed for immobilized microorganism technique on specific support, and the microorganism in cell is by water body In nutriment excitation after start carry out growth and breeding.On the one hand, microbial assimilation in carrier enters the nutrition of carrier Substance；Another party, the immature individual for breeding generation can be entered in water body by the gap of carrier, form the microorganism of high concentration Flora largely consumes the target contaminant in free water body under the action of water flow.And immobilization microorganism particles is micro- Environmental benefits are repaired water body Poisoning substance to the murder by poisoning of microorganism and bacteriophage, indigenous bacterium to microbial body in shielding Harmful competition, make it that can also stablize under complicated environmental condition, efficiently play a role.
Summary of the invention
Original position is carried out to contaminated sediments in view of the above-mentioned problems, the invention proposes a kind of application immobilized microorganism techniques The method of control, the pollutant its object is to the metabolic activity using microorganism, in degrade bed mud and water body.With opening Move that quick, easy to operate, low energy consumption, does not cause secondary pollution, segregative advantage.
The present invention adopts the following technical scheme that solution above-mentioned technical problem:
A kind of method of contaminated lake pool sediment in-situ control, the pond sludge water interface suspension immobilized microorganism dress in lake It sets, microporous aeration device includes aeration head and air compressor, and aeration head is placed in the microbe carrier of immobilized microorganism device Centre, air compressor connect aeration head by supply conduit；It is aerated by microporous aeration device, is mentioned for bed mud and lake pool water body For dissolved oxygen, while will be in the spreading that bred in immobilized microorganism device to bed mud and lake pool water body.
The lake pool water body DO concentration range control is in 5.5~6.5mg/L.The lake pool water body pH scope control is 6.5 ~7.5.
The beneficial effects of the present invention are:
The method of the present invention has preferable repairing effect to overlying water and bed mud, is better than to sediments repairing effect interior Portion's bed mud can make bed mud surface form a thick layer brown oxidation layer, become natural screening agent, on the one hand, prevent down Masking covering is played the role of in the release of layer pollutants in sediments；On the other hand, it again it is different from common screening agent, it be by Bed mud Degradation and Transformation itself not will increase substrate volume, even if being also suitable in shallow waters；In addition, it is not also to water The advantages of raw environmental system constitutes harm, can provide habitat for microorganism.
Using fixed microorganism carrier as core, with traditional adhesion type and free type microbial ratio, reduce strain Loss, maintenance is more convenient.Quick, easy to operate, low energy consumption, does not cause secondary pollution, easy point with starting for the method for the present invention From the advantages of.
Detailed description of the invention
Fig. 1 is the experimental provision structural schematic diagram of the embodiment of the present invention 1, in figure: 1, reactor, 2, immobilized microorganism carries Scapus, 3, microporous aeration device, 4, air compressor, 5, gas supply regulation valve, 6, overlying water sample tap, 7, bed mud sample tap, 8, bed mud.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, but does not constitute to the present invention The limitation of claims.
Embodiment 1: in-situ immobilization experiment is carried out to contaminated lake pool bed mud and its overlying water using the method for the present invention.
As shown in Figure 1, carrying out mould to natural lake pool water body and bed mud genesis analysis as reactor using Organic glass column Quasi- to repair, the total high 100cm of reactor 1, length and width is 20cm, bed mud 8 depth 20cm, depth of water 60cm, dischargeable capacity 32L；Reaction Fixed microorganism carrier column 2 is set in muddy water interface by the way of suspension in device 1.Microporous aeration device 3 includes aeration Head connects the air compressor 4 of aeration head with by supply conduit, and supply conduit is equipped with gas supply regulation valve 5.Aeration head is long 15cm, diameter 2cm are placed in fixed microorganism carrier column 2.Bottom is respectively set at bottom 18cm and 10cm in reactor 1 Apart from top 30cm (overlying water sample tap 6 is arranged in mud sample tap 7 i.e. at water surface 10cm).
1. experiment bed mud and overlying water:
Experiment bed mud and overlying water take certain campus Hu Tang, and pollutant initial value is water body: CODMnFor 15~ 20mg/L, TP0.2~0.3mg/L, NH3- N is 2~3mg/L, and TN is 2~3mg/L；Bed mud: TOC is that 13%~16%, TP is 5500~6000mg/kg, TN are 7000~7500mg/kg.
2. experimental method
Using two identical reactors 1, one is used as experimental group, and one as a control group.Wherein experimental group uses Above-mentioned experimental provision and the method for the present invention, fixed microorganism carrier 170g control DO in 5.5~6.5mg/L, and with dilute Sulfuric acid and sodium hydroxide control pH 6.5~7.5；Control group does not carry out any processing.
3. experimental result
By monitoring hair to 15 days primary substrates of water quality interval primary water quality monitoring in 1 day in reactor and bed mud interval It is existing, by 30 days by a definite date confirmatory experiments, the COD of experimental group water qualityMn、NH3- N, TN and TP concentration respectively by 19.10mg/L, 2.10mg/L, 2.44mg/L, 0.188mg/L drop to 4.27mg/L, 0.10mg/L, 0.68mg/L, 0.034mg/L, by earth's surface The bad V class water quality optimizing of quality standard of water environment (GB3838-2002) has arrived Group III water standard；And control group CODMn、NH3-N、 TN and TP concentration then drops to 7.44mg/L, 0.9mg/L, 1.4mg/L and 0.077mg/L respectively, is surface water environment quality Standard (GB3838-2002) IV class water standard.TOC, TN, TP of experimental group sediments degrade 33.35% respectively, 43.35% and 23.20%, 4%, 6% and 9% has been respectively increased compared to the control group.TOC, TN, TP of bed mud inside experimental group 19.76%, 37.33% and 8.91% is degraded respectively, and 5%, 6% and 2% has been respectively increased compared to the control group.
It is above-mentioned the results showed that the method for the present invention has preferable repairing effect to overlying water and bed mud, to surface layer Remedying sludge effect is better than internal bed mud, and bed mud surface can be made to form a thick layer brown oxidation layer, become natural masking Agent, on the one hand, prevent the release of lower layer's pollutants in sediments, play the role of masking covering；On the other hand, it again with it is common Screening agent is different, it is not will increase substrate volume from bed mud Degradation and Transformation itself, even if being also suitable in shallow waters； The advantages of being endangered in addition, it is not constituted aquatic environment system also, habitat being provided for microorganism.

Claims (1)

1. a kind of reactor for carrying out in-situ control to contaminated lake pool bed mud, it is characterised in that: the reactor is always high 100cm, length and width are 20cm, bed mud depth 20cm, depth of water 60cm, dischargeable capacity 32L；Using suspension in the reactor Fixed microorganism carrier column is arranged in muddy water interface in mode, is additionally provided with microporous aeration device in the reactor, described Microporous aeration device includes the air compressor that aeration head connects aeration head with by supply conduit, and the supply conduit is equipped with Gas supply regulation valve, the long 15cm of aeration head, diameter 2cm, the aeration head is placed in fixed microorganism carrier column, described Bed mud sample tap is respectively set at bottom 18cm and 10cm in reactor, and overlying water sample tap is arranged at the 30cm of top.
CN201610807791.8A 2016-09-07 2016-09-07 A kind of method of contaminated lake pool sediment in-situ control Active CN106277683B (en)

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CN107162209A (en) * 2017-05-22 2017-09-15 浙江阿凡柯达环保科技有限公司 A kind of biological dredging method of polluted water body in-situ
CN112194256A (en) * 2020-09-29 2021-01-08 中生源(海南)生态环境发展有限公司 Integrated device for cooperative treatment of water body and bottom mud

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CN103420544A (en) * 2013-08-14 2013-12-04 广西大学 In-situ water repair method for clean aquaculture
CN104386825A (en) * 2014-12-01 2015-03-04 广西大学 Method for remediating pond water in situ

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JPH05138186A (en) * 1991-11-13 1993-06-01 B Bai B:Kk Treatment of drainage discharged from purification tank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103420544A (en) * 2013-08-14 2013-12-04 广西大学 In-situ water repair method for clean aquaculture
CN104386825A (en) * 2014-12-01 2015-03-04 广西大学 Method for remediating pond water in situ

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