CN108663427A - A kind of seawater BOD online auto monitoring systems based on microbial film reactor - Google Patents
A kind of seawater BOD online auto monitoring systems based on microbial film reactor Download PDFInfo
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- CN108663427A CN108663427A CN201810498877.6A CN201810498877A CN108663427A CN 108663427 A CN108663427 A CN 108663427A CN 201810498877 A CN201810498877 A CN 201810498877A CN 108663427 A CN108663427 A CN 108663427A
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Abstract
The invention discloses a kind of seawater BOD online auto monitoring systems based on microbial film reactor, including feeding device, solenoid valve, peristaltic pump, buffer pool, microbial film reactor, solenoid valve, peristaltic pump and buffer pool are sequentially connected by hose；Air pump is installed to continue to be aerated into sample liquid in buffer pool, and apopore is equipped in bottom；Apopore is connect by solenoid valve with microbial film reactor；The microbial film reactor other end is connect with buffer pool；Buffer pool bottom is connected to equipped with apopore with waste liquid pool.Buffer pool and microbial film reactor are placed in water bath with thermostatic control heating device；Peristaltic pump, solenoid valve, air pump, constant temperature heating device are controlled by control panel；Dissolved oxygen sensor is set in buffer pool and connects data collecting card, data are uploaded to host computer.System is simple in structure, the response time is short, performance is stablized for seawater BOD monitoring.
Description
Technical field
The present invention relates to water quality monitoring fields, and in particular to a kind of seawater BOD based on microbial film reactor is online certainly
Dynamic detecting system.
Background technology
Biochemical oxygen demand (BOD) (BOD) indicates Organic substance in water oxygenolysis under the biochemical action of microorganism, inorganization at its
Or when aerifying consumed oxygen in water total amount.BOD reflects indirectly in water can containing by the organic matter of biological oxidation
Amount, which is seawater, surface water, sanitary sewage and most industrial wastewater, must survey one of index.BOD values are higher, show in water
Organic matter is higher by the risk of microbial degradation in itself water environment, is more easy to cause water environment dissolved oxygen and drastically reduces, causes
A series of ecological problem.
The standard determination method of seawater BOD is dilution inocalation method (BOD5), i.e., sample is placed in 20 DEG C of temperature environment
Culture five days measures the front and back dissolved oxygen of culture respectively, and the difference between the two is BOD values, and unit is indicated with the mg/L of oxygen.Due to
This method poor repeatability, operation is complex, requires disturbing factor in relatively high, its continuous mode to the technology of operating personnel
It is more, and minute is 5 days, cannot reflect water quality situation and feedback information in time, to can not also carry out on-site supervision, no
Can be timely that environmental management and decision, scientific research, contamination accident etc. provide scientific basis.
The continuous online automatic monitor device that microbe sensor method measures BOD at present has had many researchs.It is raw
The principle of object sensor be diffused on electrode by fixed microorganism film layer using dissolved oxygen in water sample can show it is certain
Electric current, and dissolved oxygen largely reduces after biochemical reaction occurs in water, oxygen electrode electric current is reduced rapidly therewith.According to this electric current
Decreasing value obtain BOD on the curve demarcated in advance5。
Existing literature is retrieved and is found, Hu Rui etc. can efficiently remove ammonia nitrogen and nitrous in breeding water body by co-culturing structure
Hydrochlorate nitrogen fixation complex function mattress group makes BOD biosensor microbial films using folder embrane method.Open happy equal one plant of selection
Saccharomycete resistant to high osmotic pressure embeds saccharomycete as sensitive material, with polyvinyl alcohol, using dissolved oxygen electrode method as base
Plinth makes BOD sensors, and a seawater standard specimen can be measured in 15min with the sensor.The joint research and developments such as Xiamen University
XHBOD01 type seawater BOD light guide analyzer model machines, the analyzer realize seawater BOD based on optical fiber microbiological sensor
Quick automatic determining.These methods mostly be based on microbial membrane sensor, will be in laboratory using chemically or physically method
Microbial film is made in the microorganism embedding of culture, and major defect is that microorganism fungus kind quantity is few, type is single, to organic matter degradation
Efficiency is low, highly selective and environment-adapting ability is poor.
Current microbiological sensor is difficult to meet high sensitivity, high-precision, the development trend of fast response time, therefore have
Necessity further increases sensor performance, and improves the accuracy and stability of BOD monitoring systems.
Invention content
Present invention aims at a kind of monitoring efficiency height of offer, response time are short, performance stabilization anti-based on microbial film
Answer the seawater BOD online auto monitoring systems of device.
To achieve the above object, following technical scheme is used：The invention mainly comprises feeding device, solenoid valve, wrigglings
Pump, buffer pool, microbial film reactor, the solenoid valve include the first solenoid valve, second solenoid valve, third solenoid valve and the
Four solenoid valves, the first solenoid valve, second solenoid valve, third solenoid valve one end respectively with first into flow container, second into flow container,
Three into flow container be connected, the first solenoid valve, second solenoid valve, third solenoid valve the other end pass through hose with peristaltic pump one end respectively
Be connected, the peristaltic pump other end be inserted into the first buffer pool, the first buffer pool bottom be equipped with the first apopore, the first apopore with
4th solenoid valve one end, the 4th solenoid valve other end are connected with microbial film reactor, and the microbial film reactor other end is inserted into
Second buffer pool, the second buffer pool bottom open up the second apopore, and the second apopore is connected with waste liquid pool；First buffer solution
Pond, the second buffer pool, microbial film reactor are both placed in water bath with thermostatic control heating device；It is equipped in the first buffer pool
First dissolved oxygen sensor, is equipped with the second dissolved oxygen sensor in the second buffer pool, and the first, second dissolved oxygen sensor connects
It connects and data is uploaded to host computer after data collecting card；First solenoid valve, second solenoid valve, third solenoid valve, the 4th electricity
Magnet valve, peristaltic pump are connected by data line with control panel respectively, control panel separately with air pump, water bath with thermostatic control heating device phase
Even, air pump bottom end is inserted into the first buffer pool.
Further, the water bath with thermostatic control heating device is made of thermostat water bath, temperature sensor and heating rod；Constant temperature
Water bath heating device ensures the best degradation temperature of microbial film reactor controlled at 30 DEG C.
Further, the flow velocity of the peristaltic pump is 3ml/min.
Further, the air-blowing amount of the air pump is 2L/min.
Further, the microbial film reactor outer wall is spiral glass tube, tubing internal diameter 3.0mm, length of pipe
For 100cm, glass inside pipe wall attached microbial film；The microbial film by seawater sewage microorganism adsorption, multiply.
Further, first dissolved oxygen sensor, the second dissolved oxygen sensor range be 0-60mg/L.
Further, the electric current after the stabilization of the first dissolved oxygen sensor output is I1, the second dissolved oxygen sensor
Current value after the stabilization of output is I2, data collecting card acquires the first, second dissolved oxygen sensor current signal I in real time1、I2,
And signal is uploaded to by host computer by RS485 communications, host computer carries out data processing by I1、I2Current differential is converted into sample liquid
BOD concentration values.
The course of work approximately as：
Using in seawater sample to be measured microorganism and organic matter as culture source, under given conditions, water sample flows continuously through instead
Device is answered, the microorganism in water sample is gradually adsorbed and breeds forms microbial film in microbial film reactor wall.It is passed with dissolved oxygen
Sensor monitors the dissolved oxygen content before and after water sample is degraded, and is uploaded to the oxygen consumption that host computer calculates microbial film by signal is detected
Amount, to be converted into water sample BOD concentration values.
Compared with prior art, the invention has the advantages that：
1, microbial film reactor overcomes that response area is small, has using spiral glass tube as microbial membrane carrier
The low disadvantage of machine object degradation efficiency；Seawater sewage is passed through glass tube simultaneously, the microorganism in seawater sewage is gradually adsorbed, multiplies
Microbial film is formed in glass inside pipe wall, so as to meet the measurement to seawater, also eliminates microbial bacteria in tradition film
The kind defect that quantity is few, adaptive capacity to environment is poor.Microbial film reactor preserves under 2-8 DEG C of dry environment, reusable,
Service life is long.
2, system structure is simple, and measurement process realizes Automatic Control, while realizing on-line measurement, not by the pact of time
Beam reduces the complexity of work, substantially reduces the workload of staff.
3, using the dissolved oxygen sensor of high precision and high sensitivity and data collecting card so that when high certainty of measurement, response
Between it is short, system stability is good.
Description of the drawings
Fig. 1 is the connection diagram of present system.
Fig. 2 is the connection block diagram of present system device.
Drawing reference numeral：1- first is wriggled into flow container, the first solenoid valves of 2-, 3- second solenoid valves, 4- thirds solenoid valve, 5-
Pump, 6- air pumps, 7- control panels, the first buffer pools of 8-, the first dissolved oxygen sensors of 9-, the second dissolved oxygen sensors of 10-,
The second buffer pools of 11-, the 4th solenoid valves of 12-, 13- microbial films reactor, 14- data collecting cards, 15- host computers, 16- temperature
Sensor, 17- heating rods, 18- thermostat water baths, 19- waste liquid pools, 20- hoses, the first apopores of 21-, 22- second is spent to be discharged
Hole, 23- data lines, 24- holders, 25- second are into flow container, 26- thirds into flow container.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the invention mainly comprises feeding device, solenoid valve, peristaltic pump, buffer pool, microbial film reactions
Device, the solenoid valve include the first solenoid valve 2, second solenoid valve 3, third solenoid valve 4 and the 4th solenoid valve 12, the first electromagnetism
Valve, second solenoid valve, third solenoid valve one end respectively with first into flow container 1, second into flow container 25, third into 26 phase of flow container
Even, the first solenoid valve, second solenoid valve, third solenoid valve the other end be connected respectively by hose 20 with 5 one end of peristaltic pump, it is logical
Different electromagnetism Vavle switchings is crossed to control feed liquor specimen types.The peristaltic pump other end is inserted into the first buffer pool 8, the first buffer solution
Bottom of pond portion is equipped with the first apopore 21, the first apopore and the 4th solenoid valve one end, the 4th solenoid valve other end and microbial film
Reactor 13 is connected, and microbial film reactor is supported fixation by holder 24.The microbial film reactor other end is inserted into the
Two buffer pools 11, the second buffer pool bottom open up the second apopore 22, and the second apopore is connected with waste liquid pool 19；First is slow
Fliud flushing pond, the second buffer pool, microbial film reactor are both placed in water bath with thermostatic control heating device；In the first buffer pool
Equipped with the first dissolved oxygen sensor 9, the dissolved oxygen content for detecting undegraded sample liquid；Second is equipped in the second buffer pool
Dissolved oxygen sensor 10, the dissolved oxygen content for detecting undegraded sample liquid；First, second dissolved oxygen sensor connection data are adopted
Data are uploaded to host computer 15 after truck 14；First solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve,
Peristaltic pump is connected by data line 23 with control panel 7 respectively, and control panel is separately connected with air pump 6, water bath with thermostatic control heating device,
Air pump bottom end is inserted into the first buffer pool.
The water bath with thermostatic control heating device is made of thermostat water bath 18, temperature sensor 16 and heating rod 17；Constant temperature
Water bath heating device ensures the best degradation temperature of microbial film reactor controlled at 30 DEG C.
The flow velocity of the peristaltic pump is 3ml/min.
The air-blowing amount of the air pump is 2L/min.
The microbial film reactor outer wall is spiral glass tube, tubing internal diameter 3.0mm, length of pipe 100cm, glass
Glass inside pipe wall attached microbial film；The microbial film by seawater sewage microorganism adsorption, multiply.Monitoring process
In, sample liquid flows into after being aerated in buffer pool in microbial film reactor, having in the microbial degradation sample liquid in reactor
Machine object, consumption dissolved oxygen.
First dissolved oxygen sensor, the second dissolved oxygen sensor range be 0-60mg/L.
Electric current after the stabilization of the first dissolved oxygen sensor output is I1, the stabilization of the second dissolved oxygen sensor output
Current value afterwards is I2, data collecting card acquires the first, second dissolved oxygen sensor current signal I in real time1、I2, and pass through
Signal is uploaded to host computer by RS485 communications, and host computer carries out data processing by I1、I2The concentration of current differential and BOD are at just
Than obtaining BOD concentration values by conversion.
As shown in Fig. 2, using a kind of seawater BOD online auto monitoring systems based on microbial film reactor of the present invention
Process is as follows：Monitoring carries out temperature controlled processes first before starting：Temperature control equipment is opened, setting water-bath pot temperature is 30
DEG C, the first solenoid valve and peristaltic pump are then opened by control panel, the flow velocity that peristaltic pump is arranged is 3ml/min, extracts water sample,
Water sample flows into the first buffer pool.Air pump is opened, persistently the water sample in buffer pool is aerated, when in the first buffer pool
After water sample air aeration saturation, the first solenoid valve and peristaltic pump, simultaneous data-collecting card acquisition first are closed in control panel control
The signal value I of dissolved oxygen sensor1, and it is uploaded to host computer.The 4th solenoid valve is opened, aqueous sample stream biomembrane reaction in a subtle way is made
Device, the aperture by controlling the 4th solenoid valve control the flow velocity that sample liquid flows through reactor, start degradation process.By microbial film
The water sample of reactor flows into the second buffer pool after degradation, and waste liquid pool is discharged into after flowing through the second dissolved oxygen sensor, simultaneously number
Acquire the signal value I of the second dissolved oxygen sensor in real time according to capture card2, and it is uploaded to host computer.Host computer proceeds by data
Processing, by I1、I2Difference be converted into BOD concentration values.After monitoring process, second solenoid valve and peristaltic pump are opened, is extracted clear
Washing lotion cleans entire pipeline.
In order to detect the accuracy and system stability of the present invention, under the same conditions to a concentration of 5mg/L, 10mg/
L, the standard solution of 25mg/L, 40mg/L are detected, and measurement result is as shown in table 1.From measurement result as can be seen that system has
There are good accuracy and stability, measures relative error within 4%, best measurement range is in 20-40mg/L.Again into
One step, in order to detect advantage of the present invention compared with other measurement methods, dilution inoculation is respectively adopted under the same conditions
Method (BOD5), four kinds of water samples of Quick testing instrument and this system pair measure, measurement result is as shown in table 2.From measurement result
It can be seen that BOD5Measurement result concentration is higher, and close to actual value, but minute is 5 days, cannot reflect water quality feelings in time
Condition can not carry out field monitoring；Compared with using fast detector, measurement result of the invention is closer and BOD5Measurement knot
Fruit, it can be seen that the present invention has better precision and accuracy.
1 various criterion solution of table measures
The different measurement method measurement of comparison values of table 2
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of seawater BOD online auto monitoring systems based on microbial film reactor include mainly feeding device, electromagnetism
Valve, peristaltic pump, buffer pool, microbial film reactor, it is characterised in that：The solenoid valve includes the first solenoid valve, the second electricity
Magnet valve, third solenoid valve and the 4th solenoid valve, the first solenoid valve, second solenoid valve, third solenoid valve one end respectively with first
It is connected into flow container, second into flow container, third into flow container, the first solenoid valve, second solenoid valve, the other end difference of third solenoid valve
It is connected by hose with peristaltic pump one end, the peristaltic pump other end is inserted into the first buffer pool, and the first buffer pool bottom is equipped with the
One apopore, the first apopore and the 4th solenoid valve one end, the 4th solenoid valve other end are connected with microbial film reactor, micro- life
The object membrane reactor other end is inserted into the second buffer pool, and the second buffer pool bottom opens up the second apopore, the second apopore with
Waste liquid pool is connected；First buffer pool, the second buffer pool, microbial film reactor are both placed in water bath with thermostatic control heating device
It is interior；It is equipped with the first dissolved oxygen sensor in the first buffer pool, the second dissolved oxygen sensor is equipped in the second buffer pool,
Data are uploaded to host computer after first, second dissolved oxygen sensor connection data collecting card；First solenoid valve, the second electricity
Magnet valve, third solenoid valve, the 4th solenoid valve, peristaltic pump are connected by data line with control panel respectively, and control panel is separately and gas
Pump, water bath with thermostatic control heating device are connected, and air pump bottom end is inserted into the first buffer pool.
2. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：The water bath with thermostatic control heating device is made of thermostat water bath, temperature sensor and heating rod；Water bath with thermostatic control is heated
Device ensures the best degradation temperature of microbial film reactor controlled at 30 DEG C.
3. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：The flow velocity of the peristaltic pump is 3ml/min.
4. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：The air-blowing amount of the air pump is 2L/min.
5. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：The microbial film reactor outer wall is spiral glass tube, tubing internal diameter 3.0mm, length of pipe 100cm, glass
Glass inside pipe wall attached microbial film；The microbial film by seawater sewage microorganism adsorption, multiply.
6. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：First dissolved oxygen sensor, the second dissolved oxygen sensor range be 0-60mg/L.
7. a kind of seawater BOD online auto monitoring systems based on microbial film reactor according to claim 1, special
Sign is：Electric current after the stabilization of the first dissolved oxygen sensor output is I1, the stabilization of the second dissolved oxygen sensor output
Current value afterwards is I2, data collecting card acquires the first, second dissolved oxygen sensor current signal I in real time1、I2, and pass through
Signal is uploaded to host computer by RS485 communications, and host computer carries out data processing by I1、I2Current differential is converted into sample liquid BOD concentration
Value.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111077203A (en) * | 2020-01-13 | 2020-04-28 | 清池水环境治理科技发展(天津)有限公司 | Dual-channel microbial sensor type BOD rapid determinator for emergency detection |
| CN111307563A (en) * | 2020-04-26 | 2020-06-19 | 河南省计量科学研究院 | Microbial membrane method BOD detection system and detection method |
| CN111896699A (en) * | 2020-07-01 | 2020-11-06 | 武汉新烽光电股份有限公司 | BOD online monitoring device and method based on composite strain putting |
| CN113466311A (en) * | 2021-06-16 | 2021-10-01 | 五邑大学 | Seawater measurement method based on seawater in-situ culture microbial film |
| CN113504264A (en) * | 2021-06-23 | 2021-10-15 | 武汉新烽光电股份有限公司 | Rapid BOD detection system and detection method thereof |
| CN113562851A (en) * | 2021-06-23 | 2021-10-29 | 武汉新烽光电股份有限公司 | Quick BOD detects normal position biomembrane subassembly |
| CN114609354A (en) * | 2022-03-07 | 2022-06-10 | 上海海恒机电仪表股份有限公司 | Automatic temperature control BOD online rapid detection system and operation method thereof |
| CN117969629A (en) * | 2024-04-02 | 2024-05-03 | 四川省疾病预防控制中心(四川省预防医学科学研究院四川省卫生监测检验中心) | System and method for detecting physiological index |
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| CN111077203A (en) * | 2020-01-13 | 2020-04-28 | 清池水环境治理科技发展(天津)有限公司 | Dual-channel microbial sensor type BOD rapid determinator for emergency detection |
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| CN113562851A (en) * | 2021-06-23 | 2021-10-29 | 武汉新烽光电股份有限公司 | Quick BOD detects normal position biomembrane subassembly |
| CN114609354A (en) * | 2022-03-07 | 2022-06-10 | 上海海恒机电仪表股份有限公司 | Automatic temperature control BOD online rapid detection system and operation method thereof |
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