CN102557282B - A kind of urban heavy pollution water body mud-water termination oxidation-reduction potential regulate and control method - Google Patents
A kind of urban heavy pollution water body mud-water termination oxidation-reduction potential regulate and control method Download PDFInfo
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- CN102557282B CN102557282B CN201210009358.1A CN201210009358A CN102557282B CN 102557282 B CN102557282 B CN 102557282B CN 201210009358 A CN201210009358 A CN 201210009358A CN 102557282 B CN102557282 B CN 102557282B
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- reduction potential
- mud
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- aeration
- water termination
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- 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
Abstract
The invention belongs to environmental protection technical field, be specifically related to heavily contaminated river course, a kind of city mud-water termination oxidation-reduction potential regulate and control method. The aeration plate that the method adopts nanometer micropore aeration tube to form is placed in deposit surface, and carries out aeration by Roots's frequency conversion air blast, makes deposit surface be in for a long time higher dissolved oxygen levels, thereby improves mud-water termination oxidation-reduction potential. Oxidation reduction potential determination instrument is installed, is automatically monitored mud-water termination oxidation-reduction potential, and by programmable logic controller (PLC), signal is transferred to Roots's frequency conversion air blast, control in real time and regulate aeration rate, realize accurate aeration. Compare with traditional aeration, the method has that the bubble time of staying is long, oxygen-transfer efficiency is high, surface deposit is disturbed to the advantages such as little and aeration energy consumption is low. The present invention can be used for, in the heavily contaminated river drift original position repair of city, effectively suppressing the release of pollutant in deposit, reduces river bottom mud endogenous pollution, river training bed mud habitat is also had to important function simultaneously.
Description
Technical field
The invention belongs to environmental protection technical field, be specifically related to a kind of urban heavy pollution water body mud--water termination oxidation-reduction potential regulate and control method.
Background technology
City inland river water system is an important component part of urban environment, and compared with general water body, the hydrology of city inland river water system and deposition process are all subject to serious anthropogenic influence. The input of a large amount of industry and sanitary sewage causes city inland river to carry excessive pollutional load, and deposit is also subject to severe contamination. Between deposit and its overlying water, having equilibrium relation, there is the release risk of the pollutants such as very high nitrogen, phosphorus, heavy metal in the deposit of heavily contaminated. Therefore the release that, how to suppress pollutant in the heavily contaminated river drift of city is a great problem urgently to be resolved hurrily in treatment work.
Much research shows, deposit is deposited and discharges the tax of the pollutants such as nitrogen phosphorus and heavy metal, has very large relation with the oxidation-reduction potential (Eh) of deposit surface, and the oxidisability in deposit increases, and the ability that nitrogen phosphorus discharges declines. Iron phosphorus is that deposit discharges the main contributions form of phosphorus, and therefore improving sedimental oxidation-reduction potential the iron ion in deposit can be maintained+3 valence state, is also conducive to iron ion to phosphorus fixation, and prevents the release of phosphorus. The oxidation-reduction potential that improves as can be seen here deposit surface is a kind of important means and method that phosphorus discharges of effectively controlling.
Aeration carries out reoxygenation to overlying water, realizes by the oxidation-reduction potential of the dissolved oxygen in change overlying water and deposit surface the control that phosphorus is discharged. Aeration has the incomparable advantage of conventional deposition thing restorative procedure: treatment effeciency is high, does not add new pollutant, less to the habitat change of original position, easily maintains the system balancing of this microenvironment of deposit-overlying water. But its shortcoming is also very outstanding, that is exactly higher energy consumption and operating cost; Particularly aeration control is improper suspends bed mud can to cause equally promotion that pollutant is discharged again; Cannot ensure and maintain deposit crystallized ability to pollutant during aeration once stop aeration.
Some shortcomings that exist for aeration, improve aerator. The aeration plate that adopts nanometer micropore aeration tube to form is placed in deposit surface and carries out aeration, can reach the bubble time of staying long, and oxygen-transfer efficiency is high, avoids deposit disturbance. Simultaneously, by to mud--water termination Eh Real-Time Monitoring, and by carrying out signal transmission with Roots's frequency conversion air blast of capable of regulating flow quantity, aeration rate is regulated in real time, realize accurate aeration, to reach the effect of saving energy consumption, and the technical method of a kind of control deposit nitrogen of more optimizing, phosphorus and heavy metal release will be become.
Summary of the invention
The object of the present invention is to provide a kind of urban heavy pollution water body mud--water termination oxidation-reduction potential regulate and control method.
Urban heavy pollution water body mud--the water termination oxidation-reduction potential regulate and control method that the present invention proposes, adopts accurate micro-pore aeration method to improve mud--water termination oxidation-reduction potential. Adopting nanometer micropore aeration tube to mud--water termination is carried out aeration, improves mud--dissolved oxygen (DO) level of water termination, and then improves the oxidation-reduction potential of surface deposit. Device comprises nanometer micropore aeration tube 4, Roots's frequency conversion air blast 1, oxidation-reduction potential (Eh) automonitor 3, programmable logic controller (PLC) 2, sediments sampling pipe 6 and fixed disk; Concrete steps are:
(1): select nanometer micropore aeration tube, contain micro-antiseptic in nanometer micropore aeration tube, nanometer micropore aeration tube is wound on fixed disk, nanometer micropore aeration tube spacing adjacent on fixed disk is 3-5cm; Nanometer micropore aeration tube is connected with frequency conversion Roots blower with long rubber tube;
(2): oxidation-reduction potential (Eh) automatic analyzer is installed between overlying water and bed mud top layer, Real-Time Monitoring mud--the dynamic change of water termination oxidation-reduction potential;
(3): pass through programmable logic controller (PLC), the data-signal of oxidation reduction potential determination instrument Real-Time Monitoring is transferred to Roots's frequency conversion air blast, regulation and control Roots blower aeration rate in real time, realizing accurate aeration, and keep river course mud--water termination oxidation-reduction potential (Eh) is between-100mV ~-30mV.
Owing to having adopted technique scheme, the present invention has the following advantages:
1, micro-pore aeration method of the present invention, overcome traditional aeration because bubble is large,, the shortcoming such as oxygen-transfer efficiency low large to deposit disturbance that cause such as strong, the aeration point skewness of aeration rate.
2, the present invention is fixed on aeration plate apart from deposit surface 3cm place, and because bubble is little, bobble rise velocity is slow, at mud--and the water termination time of staying is long. Bubble impact power is little, to the basic undisturbed effect of deposit, the problem that in the deposit of effectively having avoided causing because of deposit disturbance, pollutant discharges again. Bubble slowly rises uniformly, has reduced the disturbance of aeration to upper strata water body, thereby has reduced the impact on aquatile habitat.
3, the present invention measures automatic instrument by redox and is connected by programmable logic controller (PLC) with Roots's frequency conversion air blast of capable of regulating flow quantity, and carries out signal transmission in time and feedback, realizes water body mud--the accurate cloth oxygen of water termination.
4, the present invention can be according to mud in real process--water termination Eh situation of change, by signal feedback, aeration rate and aeration time are automatically adjusted, and can reduce energy consumption, reduce the cost of microporous aeration device operation.
Brief description of the drawings
Fig. 1 is that the accurate aeration of embodiment 1 nanometer micropore changes Dynamic Graph to mud-water termination Eh.
Fig. 2 is regulation device schematic diagram.
Number in the figure: 1 is frequency conversion Roots blower; 2 is programmable logic controller (PLC); 3 is oxidation reduction potential determination instrument; 4 is nanometer micropore aeration tube; 5 is deposit; 6 is sediments sampling pipe.
Detailed description of the invention
Be described in further detail below in conjunction with example:
Embodiment 1
The concrete steps of the present embodiment are as follows:
(1): selecting external diameter is that 14mm, internal diameter are the nanometer micropore aeration tube of 9mm, wall thickness 2.5mm, in nanometer micropore aeration tube, contain micro-zeolite with carrying silver as antiseptic, effectively complexing is in rubber and plastic group, water insoluble, prevent that bacterium and algae from growing at tube wall, effectively prevent from stopping up. Microbubble is at mud--and the water termination time of staying is long, and oxygen-transfer efficiency is high, to the basic undisturbed of deposit; Nanometer micropore aeration tube is wrapped on the fixed disk that diameter is 50cm, and in fixed disk, adjacent nanometer micropore aeration tube spacing is 3-5cm; Nanometer micropore aeration tube is connected with the frequency conversion Roots blower of a capable of regulating flow quantity with long rubber tube;
(2): an oxidation-reduction potential (Eh) automatic analyzer is installed, Real-Time Monitoring mud--the dynamic change of water termination oxidation-reduction potential between overlying water and bed mud top layer;
(3): pass through programmable logic controller (PLC), the data-signal of oxidation reduction potential determination instrument Real-Time Monitoring is transferred in time to Roots's frequency conversion air blast of capable of regulating flow quantity, regulation and control Roots blower aeration rate in real time, to realize accurate aeration, reduces operation energy consumption; Mud--water termination oxidation-reduction potential (Eh) general control is advisable between-100mV ~-30mV.
The deposit adopting in experiment and overlying water are taken from belt river, Chaohu, this river belong to heavily contaminated river, particularly sedimentary phosphate seriously polluted, discharge have a big risk.
Simulated test is used the hard lucite water tank that length, width and height are 700mm × 700mm × 1000mm, from the enough river water and sediments of belt river, Chaohu in-situ acquisition. Deposit and overlying water fully mix respectively, then in each casing, first pack respectively the deposit that 30cm is thick into, then overlying water is slowly poured in casing, make the depth of water reach 60cm. Mud and water were stablized after 10 days, measured mud--the initial oxidation reduction potential of water termination. With above-described nanometer micropore aeration plate is fixed on apart from deposit surface 3cm place, and be connected with Roots's frequency conversion air blast of capable of regulating flow quantity; Meanwhile, at mud--water termination is installed oxidation-reduction potential automatic monitoring system, and by programmable logic controller (PLC), signal is transferred to frequency conversion air blast, regulates in real time aerate flux.
In experimentation, every 3 days record 1 mud--oxidation-reduction potential Eh values of water termination. The situation of change of deposit oxidation-reduction potential Eh as shown in Figure 1. As seen from Figure 1, mud--water termination Eh value by experiment before-rise to-25.82mV of 313.2mV; Compared with the control, in overlying water, orthophosphates content on average declines 68.8%, and the present invention can significantly improve heavily contaminated river course mud--the oxidation-reduction potential of water termination as can be seen here, and effectively controls the release of phosphorus in bed mud.
Embodiment 2
The deposit adopting in experiment and overlying water are taken from heavily contaminated river course, industrial park, Shanghai, due to the long-term heavy metal-containing waste water of receiving, cause in S & W body heavy metal pollution serious.
The lucite tank that the analogue means using in this example is 1400mm × 700mm × 1000mm, just makes nanometer micropore aeration disk into back-shaped square plate, and adjacent microporous pipe distance is 2.5cm. Other devices and test method are identical with embodiment 1. When on-test, in device, mud--water termination oxidation-reduction potential (Eh) is-289.7mV that, after 24 days, rise to-19.23mV of mud--water termination Eh, fluctuates between just maintain afterwards-52.14mV ~-19.78mV. Compared with the control, in overlying water, Heavy Metals content declines 48.9% ~ 75.2%, and in bed mud, Heavy Metals, taking stable bond state as main, greatly reduces the risk that in bed mud, heavy metal discharges to water body.
Claims (1)
1. urban heavy pollution water body mud-water termination oxidation-reduction potential regulate and control method, it is characterized in that adopting accurate micro-pore aeration method to improve mud-water termination oxidation-reduction potential, adopt nanometer micropore aeration tube to carry out aeration to mud-water termination, improve the dissolved oxygen levels of mud-water termination, and then the oxidation-reduction potential of raising surface deposit, the device that described regulate and control method adopts comprises nanometer micropore aeration tube (4), Roots's frequency conversion air blast (1), oxidation-reduction potential automonitor (3), programmable logic controller (PLC) (2), sediments sampling pipe (6) and fixed disk, concrete steps are:
(1): select nanometer micropore aeration tube, contain micro-antiseptic in nanometer micropore aeration tube, nanometer micropore aeration tube is wound on fixed disk, nanometer micropore aeration tube spacing adjacent on fixed disk is 3-5cm; Nanometer micropore aeration tube is connected with frequency conversion Roots blower with long rubber tube;
(2): between overlying water and bed mud top layer, oxidation-reduction potential automatic analyzer is installed, the dynamic change of Real-Time Monitoring mud-water termination oxidation-reduction potential;
(3): pass through programmable logic controller (PLC), the data-signal of oxidation reduction potential determination instrument Real-Time Monitoring is transferred to Roots's frequency conversion air blast, regulation and control Roots blower aeration rate in real time, realize accurate aeration, and keep river course mud-water termination oxidation-reduction potential between-100mV ~-30mV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210009358.1A CN102557282B (en) | 2012-01-13 | 2012-01-13 | A kind of urban heavy pollution water body mud-water termination oxidation-reduction potential regulate and control method |
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| CN201210009358.1A CN102557282B (en) | 2012-01-13 | 2012-01-13 | A kind of urban heavy pollution water body mud-water termination oxidation-reduction potential regulate and control method |
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| CN108285254A (en) * | 2018-04-18 | 2018-07-17 | 南京林业大学 | A kind of the stabilization processing unit and processing method of heavy metal pollution mud |
| CN108645758B (en) * | 2018-05-29 | 2019-07-12 | 河北省水利水电勘测设计研究院 | A kind of pollutants in sediments dynamic release analysis method |
| CN110054378B (en) * | 2019-05-14 | 2020-12-08 | 中国环境科学研究院 | River and lake bottom repairing device and method |
| CN114772758A (en) * | 2022-03-22 | 2022-07-22 | 武汉永清环保科技工程有限公司 | Water body bottom mud light disturbance method and device |
| CN116253441A (en) * | 2023-03-31 | 2023-06-13 | 合肥市水务环境建设投资有限公司 | Multi-pond wetland submerged plant recovery method |
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| CN1154615C (en) * | 2000-09-22 | 2004-06-23 | 北京中环康裕环保工程技术有限公司 | Automatic controller for sewage treatment process |
| CN101519265B (en) * | 2009-04-09 | 2011-07-13 | 孙友峰 | Sewage treatment process and system |
| CN201662710U (en) * | 2010-08-19 | 2010-12-01 | 中持（北京）环保发展有限公司 | Double-parameter aeration control system for sewage treatment system |
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