CN211921014U - Online water quality toxicity monitoring system of sewage plant - Google Patents
Online water quality toxicity monitoring system of sewage plant Download PDFInfo
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- CN211921014U CN211921014U CN202020106561.0U CN202020106561U CN211921014U CN 211921014 U CN211921014 U CN 211921014U CN 202020106561 U CN202020106561 U CN 202020106561U CN 211921014 U CN211921014 U CN 211921014U
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Abstract
The utility model discloses an online quality of water toxicity monitoring system of sewage factory, include: the device comprises a reactor, an aeration device, a sewage supply device, a dosing device, an acquisition and treatment control device and a backwashing device; the reactor is vertically divided into a right reaction space and a left monitoring space, the right reaction space is communicated with the left monitoring space through the upper part, and a biological carrier and an aeration device are arranged in the right reaction space; the bottom of the reactor is provided with a water inlet pipe which is communicated with the right reaction space; the side wall of the reactor in the left monitoring space is connected with a water outlet pipe; the sewage supply device is connected with a water inlet pipe of the reactor; the dosing device is connected with a water inlet pipe of the reactor; the acquisition and processing control device is electrically connected with a DO sensor arranged in a monitoring space on the left side of the reactor, and can acquire and process monitoring data through the DO sensor to obtain OUR data; the backwashing device is connected with the sewage supply device. The system has simple structure, does not need sludge, and has real and accurate monitoring data.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to an online quality of water toxicity monitoring system of sewage factory.
Background
Sewage treatment plants are more susceptible to the impact of toxic waste water because of the wide variety of waste waters to be collected and treated. The toxic and harmful pollutants in the industrial wastewater have various types, high content and great harm. When wastewater containing toxicity enters a sewage treatment plant adopting an activated sludge process, inhibition and toxic effects on microorganisms in the activated sludge can be generated, so that adverse transformation of a microbial community can be caused, the biological activity of the activated sludge is inhibited, the treatment efficiency of the microorganisms is reduced, the normal operation of the sewage treatment plant is damaged, and finally the effluent quality of the sewage treatment plant does not reach the standard. Toxic waste water can even completely inactivate microorganisms in sewage treatment plants.
Therefore, for sewage treatment plants for treating industrial wastewater, due to the fact that the inlet water has great uncertainty, real-time monitoring on the inlet water toxicity is urgently required, and an inlet water toxicity early warning system is required to be established. For a sewage treatment plant only treating domestic sewage, the monitoring requirement on the toxicity of inlet water is possibly not high, but the wastewater containing toxicity cannot be prevented from entering the sewage treatment plant, so the toxicity of the inlet water also needs to be monitored, and when the substance contained in the inlet water and inhibiting the activated sludge exceeds the toxicity warning line, an alarm is given out to avoid the serious influence of the entry of the toxic substance on the whole sewage treatment system.
At present, the method for determining the toxicity characteristics of sewage inflow mainly comprises two main types: physicochemical analysis method and biological analysis method. The physical and chemical analysis method is a traditional toxicity detection method, mainly carries out quantitative analysis on main components in toxic pollution, and can accurately know the content of certain toxic substance components. Biological analysis methods are used as toxicity detection methods, and the evaluation of environmental quality is realized by using reactions generated by organisms sensitive to environmental pollution or toxicity, and can be divided into two main categories: aquatic animal and plant toxicity detection method and microorganism toxicity detection method. The biotoxicity detection method can quickly reflect the comprehensive influence of various toxic substances on the environment, and is a quick detection method for comprehensive indexes of environmental toxicity. The microbial activity is reduced by inhibition by toxic substances, which manifests as respiratory inhibition.
The traditional open type respiration rate measuring method generally adopts an intermittent measuring mode, namely, activated sludge is directly added into an open type reactor to measure the respiration rate, and a proper water sample is added during measurement. The reactor is required to have the functions of sludge feeding and discharging and stirring, and the measuring equipment is relatively complex. For example, chinese patent CN102980983B discloses an online monitor analyzer and monitor system for biological toxicity of sewage, which uses a wet biochemical reaction system consisting of a sewage preprocessor and a main biochemical reactor to realize monitoring, but because of more required equipments, there are two reactors and a mud path system, the wet biochemical reaction system is complex and the maintenance is also complex.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing an online quality of water toxicity monitoring system of sewage factory can solve current open respiratory rate measuring system, needs two reactors, has the structure complicacy, maintains also more complicated problem.
The utility model aims at realizing through the following technical scheme:
the utility model discloses embodiment provides an online quality of water toxicity monitoring system of sewage factory, include:
the device comprises a reactor, an aeration device, a sewage supply device, a dosing device, an acquisition and treatment control device and a backwashing device; wherein the content of the first and second substances,
the reactor is vertically divided into a right reaction space and a left monitoring space, the right reaction space is communicated with the left monitoring space through the upper part, and a biological carrier and an aeration device are arranged in the right reaction space; a water inlet pipe is arranged at the bottom of the reactor (1) and is communicated with the right reaction space; a water outlet pipe is connected to the side wall of the reactor in the left monitoring space;
the sewage supply device is connected with a water inlet pipe of the reactor;
the dosing device is connected with a water inlet pipe of the reactor;
the acquisition processing control device is electrically connected with a DO sensor arranged in the monitoring space on the left side of the reactor, and can acquire and process monitoring data through the DO sensor to obtain OUR data;
the backwashing device is connected with the sewage supply device.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides an online quality of water toxicity monitoring system of sewage factory, its beneficial effect is:
a single reactor is adopted, and a mud path system is not needed, so that the system structure is simpler; because the reactor provided with the water inlet pipe and the water outlet pipe is an open type reactor, the carrier arranged in the reactor has similarity with the structure of the suspended phase biological community under the same water inlet condition; the reactor is vertically divided into a right reaction space and a left monitoring space, the right reaction space is a mixing space of the arranged carrier and the sewage, and the biomass of the carrier is stable, so that the on-site culture is easy, and the biomass is easy to control; because the carrier is arranged in the reactor, the monitoring can be carried out in a pipe network pump station without activated sludge; the volume of the reactor can be reduced due to the adoption of larger biomass per unit volume; the stirring function is not needed, and the stirring is carried out through aeration; the mud inlet function is not needed, the equipment is relatively simple, and the maintenance is convenient; the sampling period is short, continuous monitoring can be realized, and the cost is low; the DO sensor connected with the collection processing control device is arranged in the left side monitoring space and isolated from the right side reaction space for biochemical reaction, so that aeration bubbles of the aeration device are prevented from being silted at the bottom of the DO sensor, and the authenticity of monitoring data can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an on-line water toxicity monitoring system for a sewage plant according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the real-time monitoring results of DO and OUR when the sewage plant on-line water quality toxicity monitoring system provided by the embodiment of the utility model is used for monitoring Cu (II) ions with lower concentration;
FIG. 3 is a schematic diagram showing the real-time monitoring results of DO and OUR when the sewage plant on-line water quality toxicity monitoring system provided by the embodiment of the utility model has higher Zn (II) ion concentration;
the parts corresponding to each mark in the figure are: 1-a reactor; a 2-DO sensor; 3-a water inlet pump; 4-a first manual regulating valve; 5-a water inlet valve; 6-self-cleaning filter; 7-flow valve; 8-a second air pump; 9-gas flow controller; 10-a first air pump; 11-cleaning the valve; 12-a peristaltic pump; 13-a drain valve; 14-acquisition processing control means; 15-an aerator; 16-a second manual regulating valve; 17-a third manual regulating valve; 18-check valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1, an embodiment of the utility model provides an online water quality toxicity monitoring system of sewage factory, include:
the device comprises a reactor, an aeration device, a sewage supply device, a dosing device, an acquisition and treatment control device and a backwashing device; wherein the content of the first and second substances,
the reactor 1 is vertically divided into a right reaction space and a left monitoring space, the right reaction space is communicated with the left monitoring space through the upper part, and a biological carrier and an aeration device are arranged in the right reaction space; a water inlet pipe is arranged at the bottom of the reactor 1 and is communicated with the right reaction space; a water outlet pipe is connected to the side wall of the reactor in the left monitoring space;
the sewage supply device is connected with a water inlet pipe of the reactor;
the dosing device is connected with a water inlet pipe of the reactor;
the acquisition processing control device is electrically connected with a DO sensor arranged in a monitoring space on the left side of the reactor, and can acquire and process monitoring data through the DO sensor to obtain OUR (Oxygen Uptake Rate) data;
the backwashing device is connected with the sewage supply device.
In the above monitoring system, the sewage supply device includes:
the water inlet pump 3, the first manual regulating valve 4, the water inlet valve 5, the self-cleaning filter 6 and the flow valve 7 are connected in sequence;
the bottom of the self-cleaning filter 6 is provided with a vent pipe, and the vent pipe is provided with a third manual regulating valve 17.
Among the above-mentioned monitoring system, anti-belt cleaning device includes:
the first air pump is connected with the water outlet of the self-cleaning filter 6 through a pipeline provided with a check valve 18;
and the water pump is connected with the water outlet of the self-cleaning filter 6 through a pipeline which is sequentially provided with a second manual regulating valve 16 and a cleaning valve 11.
In the monitoring system, the dosing device is composed of a dosing pipeline provided with a peristaltic pump 12.
Among the above-mentioned monitoring system, aeration equipment includes:
an aerator 15, a second air pump 8 and a gas flow controller 9; wherein the content of the first and second substances,
the aerator 15 is arranged at the lower part in the right reaction space of the reactor 1;
the second air pump 8 is connected with the aerator 15 through a pipeline provided with the air flow controller 9.
In the above monitoring system, the water inlet pipe of the reactor 1 is connected to the water outlet pipe of the reactor 1 through a pipe provided with a water outlet valve 13. The sewage supply device is connected with a water inlet pipe between the drain valve 13 and the water inlet of the reactor 1.
In the monitoring system, the biological carrier arranged in the reaction space at the right side of the reactor 1 adopts a polyurethane biological carrier; preferably, the size of the biological carrier is: 2cm by 2 cm.
Among the above-mentioned monitoring system, collection processing controlling means respectively with aeration equipment, sewage feeding device, charge device and anti-belt cleaning device electrical connection, can control these devices, mainly comprise circuit breaker, power module, relay, PLC and touch-sensitive screen, the user can look over the data on the touch-sensitive screen, can derive the data and carry out the analysis, can carry out parameter setting to monitoring system, can realize the running state of each subassembly.
Preferably, in the monitoring system, the bottom of the reactor is tapered to facilitate evacuation.
The utility model discloses a monitoring system is through measuring activated sludge microorganism's respiratory rate, and OUR's inhibition rate judges the toxicity size of toxic substance in the accessible sewage, need not to throw and adds chemical reagent, need not to throw and adds specific bacterial, need not mud, and response time is fast, can realize real on-line monitoring.
The embodiments of the present invention will be described in further detail below.
As shown in figure 1, the embodiment of the utility model provides an online water quality toxicity monitoring system of sewage factory, for the integrated cabinet body structure, include: the device comprises a sewage supply device, a reactor, an aeration device, a back washing device, a dosing device and an acquisition and treatment control device; wherein, the sewage supply device inputs sewage into the reactor 1 through a water inlet pump 3, a manual regulating valve 4, a water inlet valve 5, a self-cleaning filter 6 and a flow valve 7; the right side reaction space in the reactor 1 is a mixing space of the biological carrier and the sewage, the sewage enters the right side reaction space from the bottom of the reactor 1 and overflows to the left side monitoring space in the reactor 1 from the upper end, an aerator 15 in the right side reaction space of the reactor 1 is aerated through a second air pump 8 and a gas flow controller 9, and the dissolved oxygen in the left side monitoring space in the reactor 1 is monitored by using a DO sensor 2; the DO sensor is connected with the acquisition processing control device 14, and is used for acquiring and processing the monitored data and obtaining OUR data; the falling biological membrane in the reactor 1 and the emptying of the reactor 1 are discharged through a drain valve 13 at the bottom; the backwashing device washes the self-cleaning filter 6 by water through the second manual regulating valve 16 and the cleaning valve 11, and gas-washes the self-cleaning filter 6 by the first air pump 10 and the check valve 18; the dosing device adopts a peristaltic pump 12 and can supplement a carbon source into the reactor 1; the acquisition processing control device 14 mainly comprises a circuit breaker, a power supply module, a relay, a PLC and a touch screen.
The monitoring mode of the on-line water quality toxicity monitoring system of the sewage plant is as follows:
the water inlet pump 3 extracts water inlet water of a water plant from the fine grid, the water inlet water enters a right reaction space of the reactor 1 through the manual regulating valve 4, the water inlet valve 5, the self-cleaning filter 6 and the flow valve 7, the manual regulating valve 4 and the flow valve 7 jointly regulate the flow rate of the inlet water, the hydraulic retention time HRT in the reactor 1 is 3-5 min, the self-cleaning filter 6 can filter large-particle impurities, the reactor 1 is prevented from being blocked, the maintenance is convenient, and filter residues are discharged through the third manual regulating valve 18;
the right side reaction space in the reactor 1 is provided with a biological carrier and an aerator which is a mixed space of the biological carrier and sewage, the right side reaction space in the reactor 1 is aerated through a second air pump 8 and a gas flow controller 9 by an aerator 15, the gas flow can be set on a touch screen of an acquisition and treatment control device 14, so that the dissolved oxygen level in the reactor 1 is stable, the biological carrier can be in a suspension state without stirring by aeration, the sewage enters from the bottom of the right side reaction space in the reactor 1 and overflows from the upper end to a left side monitoring space, the dissolved oxygen in the reactor 1 is monitored by a DO sensor 2, the DO sensor 2 is connected with the acquisition and treatment control device 14, the monitored data is acquired and treated, OUR data is obtained, real-time data and real-time curves of DO and OUR are displayed on the touch screen of the acquisition and treatment control device 14, and comparing the calculated OUR inhibition rate with a set threshold value, and alarming when the real-time OUR inhibition rate is larger than the set threshold value, so that the inflow water contains higher toxic substances and emergency measures of sewage plants under impact are required.
The release of the fallen biological membrane in the reactor 1 and the reactor 1 is realized through a drain valve 13, the release period of the fallen biological membrane is set to be 7d, the discharge period can be adjusted according to the actual situation, and the specific parameters are set on a touch screen of an acquisition processing control device 14; the emptying of the reactor is determined according to the actual operation condition, for example, after the reactor is cleaned or the carrier is poisoned by organisms, the emptying can be realized by manually opening a drain valve 13;
the backwashing device washes the self-cleaning filter 6 for 2min through the second manual regulating valve 16 and the cleaning valve 11, washes the self-cleaning filter 6 for 2min through the first air pump 10 and the check valve 18, has a backwashing period of 7d, can be adjusted according to actual conditions, and sets specific parameters on a touch screen of the acquisition processing control device 14;
the dosing device adopts a peristaltic pump 12, can supplement carbon source in the reactor 1, and can maintain the normal growth of microorganisms in the reactor 1 when the water inlet concentration is low.
The acquisition processing control device 14 mainly comprises a circuit breaker, a power supply module, a relay, a PLC and a touch screen, a user can check data on the touch screen, the data can be exported for analysis, parameters of a monitoring system can be set, and the running state of each component can be realized.
The monitoring system of the utility model adopts a single open reactor, and is vertically divided into a right side reaction space and a left side monitoring space in the open reactor, a carrier and an aerator for reaction are arranged in the right side reaction space, domestication and biofilm formation are carried out through continuous circular aeration, and after the biofilm formation is successful, the continuous measurement of the respiration rate can be realized; the stirring function is not needed, and the stirring is carried out through aeration; the method has the advantages that the method does not need to rely on activated sludge, has a wider application range, and has the characteristics of full automation in operation, rapidness and accuracy in analysis, simplicity in installation, simplicity and convenience in maintenance, low cost and the like; the DO sensor is arranged in the left side monitoring space and electrically connected with the acquisition processing control device, and the DO sensor is separated from the right side reaction space of the biochemical reaction, so that bubbles of the aerator can be prevented from being silted at the bottom of the probe of the DO sensor, and the authenticity of monitoring data is further ensured.
Examples
As shown in fig. 1, the online water quality monitoring system for a sewage plant provided by this embodiment is an integrated cabinet structure, and includes a sewage supply system, a reactor, a backwashing system, a dosing system, and an electrical system. The sewage supply system enters the reactor 1 through a water inlet pump 3, a manual regulating valve 4, a water inlet valve 5, a self-cleaning filter 6 and a flow valve 7; the right side of the reactor is provided with a mixing system of biological carriers and sewage, the sewage enters from the bottom and overflows to the left side from the upper end, the reactor is aerated through a second air pump 8 and a gas flow controller 9, and dissolved oxygen in the reactor is monitored by using a DO sensor 2; the DO sensor is connected with the electrical system 14, and is used for collecting and processing monitored data and obtaining OUR data; the biomembrane falling off from the reactor and the emptying of the reactor are realized by a drain valve 13; the backwashing system washes the self-cleaning filter by water through the second manual regulating valve 16 and the cleaning valve 11, and gas through the first air pump 10 and the check valve 18; the dosing system can supplement a carbon source into the reactor through the peristaltic pump 12; the electrical system 14 is mainly composed of a circuit breaker, a power module, a relay, a PLC, and a touch screen.
In the monitoring system, the biological carrier in the reactor is polyurethane biological carrier with the size of about 2cm multiplied by 2cm, and 20 particles are placed.
Among the above-mentioned monitoring system, draw sewage factory with intake pump 3 and intake water, enter into reactor 1 through manual control valve 4, water intaking valve 5, self-cleaning filter 6, flow valve 7, manual control valve 4 and flow valve 7 adjust into the water velocity of flow jointly, make hydraulic power dwell time (HRT) be 3 ~ 5min in the reactor, carry out the biofilm formation to the carrier in the reactor, self-cleaning filter 6 can filter large granule impurity, prevent that the reactor from blockking up, convenient maintenance, the filter residue is discharged through manual control valve.
In the monitoring system, the right reaction space in the reactor is a mixed space of a biological carrier and sewage, the reactor is aerated through the second air pump 8 and the gas flow controller 9, the gas flow setting can be carried out on the touch screen of the acquisition and treatment control device 14, so that the dissolved oxygen level in the reactor is stable, stirring is not needed, the carrier can be in a suspension state through aeration, the sewage enters from the bottom and overflows to the left side from the upper end, the dissolved oxygen in the reactor is monitored by using the DO sensor 2, the DO sensor is connected with the acquisition and treatment control device 14, the monitored data is acquired and treated to obtain OUR data, real-time data and real-time curves of DO and OUR are displayed on the touch screen of the acquisition and treatment control device 14, and the calculated OUR inhibition rate is compared with a set threshold value.
The specific method for monitoring comprises the following steps: firstly, introducing non-toxic sewage, performing biofilm formation on a biological carrier in a reactor to generate a stable DO baseline in the reactor, firstly, introducing simulated sewage containing a certain amount of Cu (II) ions, observing real-time changes of DO and OUR values (see figure 2), calculating and analyzing the toxicity degree of the sewage in real time through a self-defined OUR inhibition rate formula, and alarming when the inhibition rate reaches a set limit; secondly, biofilm formation is carried out on the biological carriers by adopting the same method, when a stable DO base line is generated in the reactor, simulated sewage containing a certain amount of Zn (II) ions is introduced, real-time change of DO and OUR values is observed (see figure 3), the toxicity degree of the sewage is calculated and analyzed in real time through a self-defined OUR inhibition rate formula, and when the inhibition rate reaches a set limit, an alarm is given.
The utility model discloses a monitoring system has following beneficial effect at least:
(1) an open reactor is adopted, and under the same water inlet condition, the structure of the biological carrier and the structure of the suspended phase biological community have similarity;
(2) the biomass of the biological carrier is relatively stable, and the biological carrier is easy to culture in situ and control;
(3) the biological carrier is used, so that monitoring can be carried out in a pipe network pump station without activated sludge;
(4) the larger biomass per unit volume can reduce the volume of the reactor;
(5) the stirring function is not needed, and the stirring is carried out through aeration;
(6) the sludge inlet function is not needed, the monitoring can be realized only by using a single reactor, the system is relatively simple in structure, and the maintenance is convenient;
(7) the sampling period is short, continuous monitoring can be realized, and the cost is low;
(8) the DO sensor is arranged in a left monitoring space isolated from a right reaction space for biochemical reaction, so that aeration bubbles can be prevented from being deposited at the bottom of a DO sensor probe, and the authenticity of monitoring data is guaranteed.
(9) The whole system is of an integrated cabinet body structure, is simple to install, convenient to transport, simple and convenient to maintain, capable of achieving continuous monitoring and low in cost.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an online water quality toxicity monitoring system of sewage factory which characterized in that includes:
the device comprises a reactor, an aeration device, a sewage supply device, a dosing device, an acquisition and treatment control device and a backwashing device; wherein the content of the first and second substances,
the reactor (1) is vertically divided into a right reaction space and a left monitoring space, the right reaction space is communicated with the left monitoring space through the upper part, and a biological carrier and an aeration device are arranged in the right reaction space; a water inlet pipe is arranged at the bottom of the reactor (1) and is communicated with the right reaction space; a water outlet pipe is connected to the side wall of the reactor in the left monitoring space;
the sewage supply device is connected with a water inlet pipe of the reactor;
the dosing device is connected with a water inlet pipe of the reactor;
the acquisition processing control device is electrically connected with a DO sensor arranged in the monitoring space on the left side of the reactor, and can acquire and process monitoring data through the DO sensor to obtain OUR data;
the backwashing device is connected with the sewage supply device.
2. The online water toxicity monitoring system for sewage plants according to claim 1, wherein the sewage supply apparatus comprises:
the water inlet pump (3), the first manual regulating valve (4), the water inlet valve (5), the self-cleaning filter (6) and the flow valve (7) are connected in sequence;
and the bottom of the self-cleaning filter (6) is provided with a vent pipe, and the vent pipe is provided with a third manual regulating valve (17).
3. The online water toxicity monitoring system of sewage plant of claim 2, wherein the backwashing device includes:
the first air pump is connected with a water outlet of the self-cleaning filter (6) through a pipeline provided with a check valve (18);
and the water pump is connected with the water outlet of the self-cleaning filter (6) through a pipeline which is sequentially provided with a second manual regulating valve (16) and a cleaning valve (11).
4. The on-line water quality toxicity monitoring system of a sewage plant according to any one of claims 1 to 3, characterized in that the dosing device is composed of a peristaltic pump (12) arranged on a dosing pipeline.
5. The on-line water toxicity monitoring system for sewage plants according to any of claims 1 to 3, characterized in that said aeration device comprises:
an aerator (15), a second air pump (8) and a gas flow controller (9); wherein the content of the first and second substances,
the aerator (15) is arranged at the lower part in the right reaction space of the reactor (1);
the second air pump (8) is connected with the aerator (15) through a pipeline provided with the air flow controller (9).
6. The sewage plant on-line water quality toxicity monitoring system according to any one of claims 1 to 3, characterized in that the inlet pipe of the reactor (1) is connected to the outlet pipe of the reactor (1) through a pipe provided with a drain valve (13).
7. The online water toxicity monitoring system of sewage plants according to any of claims 1 to 3, characterized in that the biological carrier disposed in the right reaction space of the reactor (1) is polyurethane biological carrier.
8. The sewage plant on-line water quality toxicity monitoring system of claim 7, wherein the dimensions of the bio-carrier are: 2cm by 2 cm.
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