CN109349203A - A precise automatic control system for dissolved oxygen in an aquaculture pond and its control method - Google Patents
A precise automatic control system for dissolved oxygen in an aquaculture pond and its control method Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000001301 oxygen Substances 0.000 title claims abstract description 90
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 90
- 238000009360 aquaculture Methods 0.000 title claims abstract description 35
- 244000144974 aquaculture Species 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000005276 aerator Methods 0.000 claims abstract description 16
- 239000008239 natural water Substances 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 230000003020 moisturizing effect Effects 0.000 claims description 22
- 238000005273 aeration Methods 0.000 claims description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 7
- -1 Four control system Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 241000972773 Aulopiformes Species 0.000 claims description 3
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 claims description 3
- 238000012279 drainage procedure Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000011112 process operation Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 5
- 238000005243 fluidization Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000009395 breeding Methods 0.000 description 3
- 230000001488 breeding effect Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000006213 oxygenation reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000007954 hypoxia Effects 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 235000013547 stew Nutrition 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
本发明公开了一种水产养殖塘溶解氧精准自动控制系统及其控制方法，根据养殖特点和溶解氧变化规律，设计了养殖水塘、自然水体、控制系统、水循环系统。通过在线测量水体溶解氧和排放水量情况，精准控制曝气机冲氧量，避免供氧不足引起水体缺氧和供氧过剩浪费成本。本发明突出优点是实时在线测量、精准控制溶解氧、有效调节养殖塘水体水质、提高养殖产量和质量。投资少、运行成本成本低；工艺操作简单、处理效果好、生态环境效益好。The invention discloses a precise automatic control system for dissolved oxygen in an aquaculture pond and a control method thereof. According to the characteristics of aquaculture and the change rule of dissolved oxygen, a culture pond, a natural water body, a control system and a water circulation system are designed. By measuring the dissolved oxygen in the water body and the amount of discharged water online, the amount of oxygen flushed by the aerator can be precisely controlled to avoid wasting costs caused by insufficient oxygen supply in the water body and excessive oxygen supply. The outstanding advantages of the invention are real-time online measurement, precise control of dissolved oxygen, effective regulation of the water quality of aquaculture ponds, and improvement of aquaculture output and quality. Low investment, low operating cost; simple process operation, good treatment effect and good ecological and environmental benefits.
Description
Technical field
The invention belongs to environmental protection and water remediation fields, and in particular to a kind of aquaculture pool dissolved oxygen precisely automatically controls
System and its control method.
Background technique
China's aquaculture total amount has occupied the first in the world.The superiority and inferiority of water quality is for aquatic products in aquaculture process
Quality sum number amount has a decisive role.Dissolved oxygen concentration especially in the aquaculture pool, dissolved oxygen can aoxidize
The functions such as evil organic matter, nitrification ammonia nitrogen, stirring.However in practical breeding process, since dissolved oxygen and measuring contamination data lack
It is weary, control system is insufficient causes blindly to be aerated or lag aeration, low level management seriously affects product yield and quality.And
The sewage pollution surrounding body of discharge, constitutes a serious threat to Regional Water Environment.
A kind of Chinese patent application file " multi-point universal cultivating pool self-adaptation measurement and control of application number 201610108436.1
Mould group ", mainly it is made of the computer of Integrated data management system, ZigBee gateway, observing and controlling mould group and general purpose transducer.It is logical
It include signal type marker circuit and universal joint with sensor, observing and controlling mould group is provided with blanket socket, measures pond waters
The various sensor signals such as pH, dissolved oxygen and the water temperature of index can be connected to any one of observing and controlling mould group by universal joint
On a blanket socket, observing and controlling module internal setting signal decision circuitry can be with automatic identification sensor signal type, and cuts automatically
Corresponding circuits are changed to handle measuring signal.But this method, which does not have, reasonably calculates the practical oxygen demand of aquaculture
And prediction, lack accuracy.
A kind of Chinese patent application file " freshwater aquiculture waste water advanced treatment recovery system of application number 201610111772.1
System and its method ", including culture pond, culture pond water outlet discharge freshwater aquiculture waste water；Desilting collecting-tank, desilting collecting-tank enter water
Mouth is connect by pipeline with culture pond water outlet, and desilting collecting-tank water outlet connects biological reinforced fluidisation pond water inlet；It is biological strong
Change fluidisation pond, biological reinforced fluidisation pond water outlet connects secondary purification pond water inlet by pipeline；Built in biological reinforced fluidisation pond
Biologic packing material；Secondary purification pond, plantation soil pick-up ability strong water plant or landscape plant or the economical aquatic vegetable of plantation；Two
Grade clarifier-tank water outlet is connect by pipeline with culture pond water inlet.But this method investment is big, operating cost is high, in water body
Detecting and controlling for dissolved oxygen does not relate to.
A kind of Chinese patent application file " wisdom fishery cultivating monitoring system " of application number 201610250943.9, it is described
Wisdom fishery cultivating monitoring system includes sensor module, safety detection device, A.C. contactor, monitor terminal and display and behaviour
Make terminal；The sensor module, safety detection device, A.C. contactor are connected by the way of cable with monitor terminal
It connects；The monitor terminal is attached in the form of internet with display with operating terminal.But this method is only to aquaculture
The data perception of environment, safe early warning, intelligent decision, intellectual analysis are especially precisely controlled Jie not to the control of dissolved oxygen
It continues.
" water conservancy water body is aerated oxygen supply device and its oxygen supply side to the Chinese patent application file of application number 201610283586.6
Method ", water conservancy water body is aerated oxygen supply device, including kickboard, chassis is equipped in kickboard, the periphery on chassis is additionally provided with outer ring, described outer
It encloses surrounding and floating block of leaning to one side is connected with by connecting rod, which is characterized in that shell is installed, shaft extends across shell on the chassis
To below kickboard, bottom end is equipped with impeller, and the shaft top is equipped with power generator, offered in the power generator into
Air port；Gear one is installed on the intracorporal shaft of shell, motor one is mounted in shell, and the top of motor one is equipped with gear
Two, connecting rod is connected on rear side of the gear two, motor two is advanced by controls connecting rod engages gear two with gear one with retrogressing
Or separation.But this method does not have in water body dissolved oxygen detect and control to be illustrated.
A kind of Chinese patent application file " pond hydrodynamic force formation equipment " of application number 201610402407.6, discloses
A kind of pond hydrodynamic force forms equipment, including submersible type structure and the adjustable floating body of buoyancy, reduction gearbox, motor, surge blade and
Water lift impeller, the output end of reduction gearbox are equipped with the water lift shaft of differential rotation and shaft of surging, and the velocity of rotation of water lift shaft is high
In shaft of surging, water lift impeller is connected with water lift shaft, and blade of surging is connected by connection frame with shaft of surging, surge blade and
Connection frame is rotatably connected.But this method is analyzed and is controlled to the oxygen demand of dissolved oxygen in pond waters.
A kind of Chinese patent application file " cultivating pool pH of wireless sensor network of application number 201610695550.9
Value control system ", a kind of cultivating pool value control system of wireless sensor network is disclosed, the system is by aquaculture pond
Environmental parameter acquisition is formed with control platform with the cultivating pool value cascade control system based on composite controller.According to aquaculture pond
Non-linear and large time delay and the features such as being unevenly distributed weighing apparatus of pond value that the operating condition area of pool environment value parameter is big, value changes, if
A kind of cultivating pool value control system of wireless sensor network is counted, the system is steady to raising aquaculture pond value control
It is qualitative to there are huge promotion and application to be worth with precision and the economic benefit for improving aquaculture.But this method is in cultivating pool
Dissolved oxygen, which detects and controls, to be not directed to.
A kind of Chinese patent application file " solar energy oxygenation for breed in stew of application number 201610963255.7
Ship discloses a kind of solar energy aerating vessel for breed in stew, belongs to fishery cultivating field.Including hull and deck, deck
On be provided with solar powered mechanism, be provided with oxygen-enriching mechanism, navigation sector and battery in hull, oxygen-enriching mechanism includes transmission
The bottom end of axis and air pump, transmission shaft is provided with propeller；Hull tail portion is provided with propeller, and propeller is connected to the battery；
Hull front end is provided with dissolved oxygen sensor, the dissolved oxygen in water situation detected by dissolved oxygen sensor；Solar panel institute
It produces electricl energy and is stored in battery, for providing electric energy for propeller, oxygen-enriching mechanism and navigation sector.But this method is to water body
Middle dissolved oxygen, which detects and controls, to be not directed to.
A kind of Chinese patent application file " intelligent fishery cultivating based on Internet of Things of application number 201710100950.5
System ", provide a kind of intelligent fishery cultivating system based on Internet of Things, including monitoring water environment module, oxygenation module, change
Water module, water temperature control module and mobile monitoring center, the monitoring water environment module, change water module, water temperature control at oxygenation module
Molding block is all connect with mobile monitoring center to center communications.Slap fishery cultivating family in real time by the mobile monitorings such as computer center
Cultivation water environmental information is held, realizes scientific culture and the management of aquaculture, is finally realized energy-saving, environmentally protective.But
Detecting and controlling and being to clearly state for this method dissolved oxygen, does not set up the method accurately predicted more.
Summary of the invention
In order to overcome dissolved oxygen data deficiency in existing aquaculture process, collect not in time, be difficult to realize be precisely controlled
The problem of, the present invention provides a kind of accurate automatic control system of aquaculture pool dissolved oxygen and its control methods.By online
Measure Dissolved Oxygen in Water and discharge water situation, be precisely controlled aerator and rush oxygen amount, avoid causing for hypoxgia water hypoxia and
For oxygen excess cost of idleness, effectively adjusts culture pond water quality, improves cultured output and quality.
Outstanding advantages of the present invention are real-time online measurings, are precisely controlled dissolved oxygen, effectively adjust culture pond water quality, mention
High cultured output and quality.Small investment, operating cost are at low cost；Technological operation is simple, high treating effect, ecological environment benefit
It is good.
Foregoing invention purpose of the invention is achieved through the following technical solutions:
A kind of accurate automatic control system of aquaculture pool dissolved oxygen, including cultivation pool, natural water, control system,
Four parts of water circulation system；
Wherein control system be included in linear flow rate meter, online DO analyzer, online COD analyzer, online nh 3-n analyser,
Controller, aerator.
Water circulation system includes moisturizing, draining, evaporation, rainfall.According to water balance, each disengaging water of water circulation system
The relationship of freeze mode (1):
Moisturizing water Q1+ rainfall water Q4=drainage quantity Q2+ evaporated water Q3 formula (1)
A kind of accurate autocontrol method of aquaculture pool dissolved oxygen, comprising the following steps:
Step 1) cultivation pool is drained into natural water, and online flow measurement obtains flow Q2 in drainage procedure；
Step 2) derives formula (2) according to formula (1), determines moisturizing water Q1；
Moisturizing water Q1=drainage quantity Q2+ evaporated water Q3- rainfall water Q4 formula (2)
Wherein, moisturizing water accounts for about the 5%~9% of cultivation pool water.Moisturizing number is determines according to actual conditions, unsuitable
More than three times a day.
Step 3) control system is supported respectively by online DO analyzer, online COD analyzer, online nh 3-n analyser
Grow DO measured value in pool, COD measured value, ammonia nitrogen measured value；
Step 4) is calculated according to formula (3) DO measured value, COD measured value, ammonia nitrogen measured value is measured, and is obtained aerobic
Measure O2:
O2=aV (CODMeasured value-CODStandard value)+bV(NH3-NMeasured value-NH3-NStandard value)+cV(O2 standard values-O2 measured values) formula (3)
In formula: O2Oxygen demand (kgO2/d)；
Volume (the m in V- cultivation pool3)；
CODMeasured valueIt cultivates COD in pool and measures concentration (g/m3)；
CODStandard valueCultivate COD normal concentration (g/m in pool3)；
NH3-NMeasured valueCultivate NH in pool3- N measures concentration (g/m3)；
NH3-NStandard valueCultivate NH in pool3- N normal concentration (g/m3)；
O2 measured valuesCultivate O in pool2It measures concentration (mg/L)；
O2 standard valuesCultivate O in pool2Normal concentration (mg/L)；It is necessary that dissolved oxygen standard need to meet continuous 16h or more middle for 24 hours
Greater than 5mg/L, whenever remaining must not be lower than 3mg/L, for salmon fishes inhabit water slope freezeup period remaining whenever not
It obtains and is lower than 4mg/L.
The oxygen equivalent of a-COD, takes 2-4；
B- constant, oxygen amount (kgO needed for aoxidizing per kilogram ammonia nitrogen2/ kgN), take 5-8；
C- constant, dissolved oxygen equivalent, takes 2-3.
The oxygen demand in step 5) cultivation pool obtained by calculation, controls aerator aeration time and aeration quantity
System.
Aerator uses blast aeration, 3~5m of aeration intensity3/m2.h.It, can be by formula (4) by standard state when blast aeration
Lower sewage oxygen demand, the air demand being scaled under standard state.
In formula: GsAir demand (m under one standard state3/h)；
Oxygen content (kgO in every cubic metres of air under 0.28- standard state (0.lMPa, 20 DEG C)2/m3)；
Under 0s- standard state, aquaculture pool sewage oxygen demand (kgO2/h)；
EAThe utilization rate of aerator oxygen, in terms of %.
Compared with the prior art, the present invention has the advantages that
(1) present invention is advised as core according to cultivation feature and dissolved oxygen variation using being precisely controlled dissolved oxygen in breeding water body
Rule, solve dissolved oxygen data deficiency in aquaculture process, collect not in time, be difficult to realize the difficulties being precisely controlled.
(2) construction investment and easy to implement.By construction and transformation in situ, realizes that dissolved oxygen efficiently controls, realize and support
Grow the promotion of water body health, aquatic products yield and quality.
(3) flexible operation, high treating effect.By being obtained to status dissolved oxygen in breeding water body and target dissolved oxygen, with
And the analysis of the substances oxygen consumption such as COD, ammonia nitrogen of main oxygen consumption, it then precisely determines oxygen demand, aeration is reasonably controlled.
Waste, investment reduction and operating cost are reduced, management is easy.
Generally speaking, the present invention is according to cultivation feature and dissolved oxygen changing rule, devise cultivation pool, natural water,
Four control system, water circulation system parts.By on-line measurement Dissolved Oxygen in Water and discharge water situation, it is precisely controlled aeration
Machine rushes oxygen amount, avoids causing water hypoxia for hypoxgia and for oxygen excess cost of idleness.Outstanding advantages of the present invention are real-time onlines
It measures, is precisely controlled dissolved oxygen, effectively adjusts culture pond water quality, improve cultured output and quality.Small investment, operating cost
It is at low cost；Technological operation is simple, high treating effect, ecological environment benefit are good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the accurate automatic control system of the aquaculture pool of the present invention dissolved oxygen；
In figure: cultivation pool: 1, natural water；2, control system: 3, water circulation system: 4, online flowmeter: 3-1,
Line DO analyzer: 3-2, online COD analyzer: 3-3, online nh 3-n analyser: 3-4, controller: 3-5, aerator: 3-5；Water
The circulatory system: 4, moisturizing: 4-1, draining: 4-2, evaporation: 4-3, rainfall: 4-4.
Specific embodiment
Technical solution of the present invention is further described by following specific embodiment.
Embodiment 1
About 22 mu of 1 water surface area of cultivation pool of the present embodiment is about 266m, and wide about 55m, depth about 2.0m, water is about
For 29260m3；By 2 gutter of periphery natural water, draining is unobstructed, and moisturizing is convenient.Moisturizing 4-1 water accounts for about cultivation pool 1
The 5%~9% of water, about 1463~2633.4m3。
A kind of accurate automatic control system of aquaculture pool dissolved oxygen, including cultivation pool 1, natural water 2, control system
3,4 four parts of water circulation system.Control system 3 is included in linear flow rate meter 3-1, online DO analyzer 3-2, online COD analysis
Instrument 3-3, online nh 3-n analyser 3-4, controller 3-5, aerator 3-6, power 1.5kW；Increased in water body by aeration and is dissolved
Oxygen promotes pond water convection current, oxidation and toxic gas to overflow.The input and output water of the 4 of water circulation system includes: moisturizing 4-1, row
Water 4-2, evaporation 4-3, rainfall 4-4；Wherein, moisturizing water is Q1, drainage quantity Q2, evaporated water Q3, rainfall water are
Q4.According to water balance, the relationship of each disengaging water freeze mode (1) of water circulation system:
Moisturizing water Q1+ rainfall water Q4=drainage quantity Q2+ evaporated water Q3 formula (1)
A kind of accurate autocontrol method of aquaculture pool dissolved oxygen, comprising the following steps:
Step 1), cultivation pool 1 are drained into natural water 2, and online flowmeter 3-1 measures water drain in drainage procedure
Measure Q2；
Step 2) derives formula (2) according to formula (1), determines moisturizing water Q1.
Moisturizing water Q1=drainage quantity Q2+ evaporated water Q3- rainfall water Q4 formula (2)
Step 3) control system 3 passes through online DO analyzer 3-2, online COD analyzer 3-3, online nh 3-n analyser 3-4
DO measured value, COD measured value, ammonia nitrogen measured value in cultivation pool are obtained respectively.
Step 4) is calculated according to formula (3) DO measured value, COD measured value, ammonia nitrogen measured value is measured, and is obtained aerobic
Amount,
O2=aV (CODMeasured value-CODStandard value)+bV(NH3-NMeasured value-NH3-NStandard value)+cV(O2 standard values-O2 measured values) formula (3)
=[2 × 29260 × (55-40)+5 × 29260 × (2.5-1.5)+2 × 29260 × (5-3)] ÷ 1000=
1141.14kgO2/d
In formula: O2Oxygen demand (kgO2/d)；
Volume (the m in V- cultivation pool3)；
CODMeasured valueIt cultivates COD in pool and measures concentration (g/m3), take 55mg/L；
CODStandard valueCultivate COD normal concentration (g/m in pool3), take 40mg/L；
NH3-NMeasured valueCultivate NH in pool3- N measures concentration (g/m3), take 2.5mg/L；
NH3-NStandard valueCultivate NH in pool3- N normal concentration (g/m3), take 1.5mg/L；
O2 measured valuesCultivate O in pool2It measures concentration (mg/L), takes 3.0mg/L；
O2 standard valuesCultivate O in pool2Normal concentration (mg/L), takes 5.0mg/L；
The oxygen equivalent of a-COD, takes 2-4；
B- constant, oxygen amount (kgO needed for aoxidizing per kilogram ammonia nitrogen2/ kgN), take 5-8；
C- constant, dissolved oxygen equivalent, takes 2-3.
, can be by formula (4) by sewage oxygen demand under standard state when blast aeration, the air demand being scaled under standard state.
Gs=47.54 ÷ (0.28 × 0.26)=653m3/h
In formula: air demand (m under Gs- standard state3/h)；
0.28- constant, oxygen content (kgO in every cubic metres of air under standard state (0.lMPa, 20 DEG C)2/m3)；
Under 0s- standard state, sewage oxygen demand (kgO in aquaculture pond2/h)；
EAThe utilization rate of aerator oxygen, in terms of %.
Dissolved oxygen standard need to meet continuous 16h or more middle for 24 hours and have to be larger than 5mg/L, and whenever remaining must not be lower than
3mg/L, inhabiting water slope freezeup period for salmon fishes, whenever remaining must not be lower than 4mg/L.Moisturizing water accounts for about cultivation water
The 5%~9% of pool water.Moisturizing number determines according to actual conditions, no more than three times a day.Aerator is exposed using air blast
Gas, 3~5m of aeration intensity3/m2.h。
Step 5) controls aerator aeration time and aeration quantity according to the oxygen demand of calculating, in the embodiment 1
In, aerator needs to open 2, opening time 10h, keeps dissolved oxygen in 5mg/L or more.
Claims (5)
1. a kind of accurate automatic control system of aquaculture pool dissolved oxygen, which is characterized in that including cultivation pool, natural water,
Four control system, water circulation system parts；
Wherein control system is included in linear flow rate meter, online DO analyzer, online COD analyzer, online nh 3-n analyser, control
Device, aerator；
Water circulation system includes moisturizing, draining, evaporation, rainfall.
2. special based on a kind of control method of the accurate automatic control system of aquaculture pool dissolved oxygen described in claim 1
Sign is, comprising the following steps:
Step 1) cultivation pool is drained into natural water, and online flow measurement obtains flow Q2 in drainage procedure；According to water
Balance, the relationship of each disengaging water freeze mode (1) of water circulation system:
Moisturizing water Q1+ rainfall water Q4=drainage quantity Q2+ evaporated water Q3 formula (1)
Step 2) derives formula (2) according to formula (1), determines moisturizing water Q1；
Moisturizing water Q1=drainage quantity Q2+ evaporated water Q3- rainfall water Q4 formula (2)
Step 3) control system obtains cultivation water by online DO analyzer, online COD analyzer, online nh 3-n analyser respectively
DO measured value, COD measured value, ammonia nitrogen measured value in the pool；
Step 4) is calculated according to formula (3) DO measured value, COD measured value, ammonia nitrogen measured value is measured, and obtains oxygen demand O2:
In formula: O2Oxygen demand (kgO2/d)；
Volume (the m in V- cultivation pool3)；
CODMeasured valueIt cultivates COD in pool and measures concentration (g/m3)；
CODStandard valueCultivate COD normal concentration (g/m in pool3)；
NH3-NMeasured valueCultivate NH in pool3- N measures concentration (g/m3)；
NH3-NStandard valueCultivate NH in pool3- N normal concentration (g/m3)；
Cultivate O in pool2It measures concentration (mg/L)；
Cultivate O in pool2Normal concentration (mg/L)；
The oxygen equivalent of a-COD, takes 2-4；
B- constant, oxygen amount (kgO needed for aoxidizing per kilogram ammonia nitrogen2/ kgN), take 5-8；
C- constant, dissolved oxygen equivalent, takes 2-3；
The oxygen demand in step 5) cultivation pool obtained by calculation, controls aerator aeration time and aeration quantity；
When blast aeration, sewage oxygen demand under standard state is scaled by the air demand under standard state according to formula (4)；
In formula: GsAir demand (m under one standard state3/h)；
Oxygen content (kgO in every cubic metres of air under 0.28- standard state (0.lMPa, 20 DEG C)2/m3)；
Under 0s- standard state, aquaculture pool sewage oxygen demand (kgO2/h)；
EAThe utilization rate of aerator oxygen, in terms of %.
3. a kind of accurate autocontrol method of aquaculture pool dissolved oxygen as claimed in claim 2, which is characterized in that step (1)
In, moisturizing water accounts for about the 5%~9% of cultivation pool water.Moisturizing number determines according to actual conditions, is no more than three daily
It is secondary.
4. a kind of accurate autocontrol method of aquaculture pool dissolved oxygen as claimed in claim 2, which is characterized in that step (4)
In, dissolved oxygen standard need to meet continuous 16h or more middle for 24 hours and have to be larger than 5mg/L, and whenever remaining must not be lower than 3mg/L, right
Inhabiting water slope freezeup period in salmon fishes, whenever remaining must not be lower than 4mg/L.
5. a kind of accurate autocontrol method of aquaculture pool dissolved oxygen as claimed in claim 2, which is characterized in that step (5)
In, aerator uses blast aeration, 3~5m of aeration intensity3/m2.h。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113875631A (en) * | 2021-08-23 | 2022-01-04 | 河海大学 | A chicken manure ecological treatment and reuse system and operation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872732A (en) * | 2005-06-03 | 2006-12-06 | 杨忠明 | Intelligence type control system for aeration quantity of multivariants and multiple systems |
| KR20130048615A (en) * | 2011-11-02 | 2013-05-10 | 서울시립대학교 산학협력단 | Csos treatment system equipped with continuous water monitoring equipments |
| CN104067971A (en) * | 2014-07-16 | 2014-10-01 | 大连海洋大学 | Multi-parameter multi-functional tester and method for measuring metabolic level of aquatic animals |
| CN104102255A (en) * | 2014-07-17 | 2014-10-15 | 北京城市排水集团有限责任公司 | Ammonia nitrogen coupling dissolved oxygen aeration energy-saving control system and control method |
| US20160311713A1 (en) * | 2012-10-01 | 2016-10-27 | D.C. Water & Sewer Authority | Method and apparatus for maximizing nitrogen removal in wastewater |
-
2018
- 2018-09-19 CN CN201811090864.1A patent/CN109349203A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872732A (en) * | 2005-06-03 | 2006-12-06 | 杨忠明 | Intelligence type control system for aeration quantity of multivariants and multiple systems |
| KR20130048615A (en) * | 2011-11-02 | 2013-05-10 | 서울시립대학교 산학협력단 | Csos treatment system equipped with continuous water monitoring equipments |
| US20160311713A1 (en) * | 2012-10-01 | 2016-10-27 | D.C. Water & Sewer Authority | Method and apparatus for maximizing nitrogen removal in wastewater |
| CN104067971A (en) * | 2014-07-16 | 2014-10-01 | 大连海洋大学 | Multi-parameter multi-functional tester and method for measuring metabolic level of aquatic animals |
| CN104102255A (en) * | 2014-07-17 | 2014-10-15 | 北京城市排水集团有限责任公司 | Ammonia nitrogen coupling dissolved oxygen aeration energy-saving control system and control method |
Non-Patent Citations (2)
| Title |
|---|
| 舒大兴: "TTT－1型自动蒸发站研制与功能特点", 《人民长江》 * |
| 谢冰等: "《废水生物处理原理和方法》", 30 April 2007, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113875631A (en) * | 2021-08-23 | 2022-01-04 | 河海大学 | A chicken manure ecological treatment and reuse system and operation method |
| CN113875631B (en) * | 2021-08-23 | 2022-09-30 | 河海大学 | Chicken manure ecological treatment and recycling system and operation method |
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