CN216525570U - Equipment for rapidly determining effectiveness of external carbon source of sewage treatment plant - Google Patents
Equipment for rapidly determining effectiveness of external carbon source of sewage treatment plant Download PDFInfo
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- CN216525570U CN216525570U CN202022076925.8U CN202022076925U CN216525570U CN 216525570 U CN216525570 U CN 216525570U CN 202022076925 U CN202022076925 U CN 202022076925U CN 216525570 U CN216525570 U CN 216525570U
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Abstract
A device for rapidly determining the effectiveness of an external carbon source of a sewage treatment plant comprises a constant-temperature water bath system, a main reaction system and a determination control system, wherein the constant-temperature water bath system comprises a constant-temperature water bath, a water bath heater, a temperature measuring electrode, a flow-making circulating pump and an electromagnetic stirrer; the main reaction system comprises a pre-reaction bottle and a reaction bottle, wherein stirrers are respectively arranged in the pre-reaction bottle and the reaction bottle, the pre-reaction bottle is also provided with a gas distributor, the gas distributor is connected with an external aeration pump through a pipeline, and dissolved oxygen electrodes are respectively arranged corresponding to the pre-reaction bottle and the reaction bottle; the measurement control system comprises a control module and an interactive display device, the equipment does not need to be attended by a special person during operation, the control module controls the system to realize temperature regulation and control, on-line and measurement and automatic judgment of various data, performance early warning and process adjustment suggestions are provided for operators, and the efficiency is high; meanwhile, the structure is simple, the size is small, the space is saved, the operation is simple and convenient, and the maintenance is easy.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to equipment for rapidly determining the effectiveness of an external carbon source of a sewage treatment plant.
Background
The problem that the C/N ratio of sewage received by domestic sewage treatment plants is low generally exists, which can cause that the carbon source amount in the denitrification process of the activated sludge treatment method can not meet the requirement, the denitrification and dephosphorization process is limited, and the sewage treatment plants usually need to be supplemented by additional carbon sources in the actual operation process.
At present, terminal effluent of a sewage treatment plant is generally used as a carbon source quality determination index in production, but the retention time of sewage in the sewage treatment plant is generally longer (generally more than 1 day), the sewage treatment process is more complex in actual working conditions, factors influencing the quality of the terminal effluent are more, and the quality of the effluent is influenced by the changes of various control parameters and external factors. Therefore, the reaction of the effectiveness of the carbon source only by the quality of the terminal effluent water has hysteresis, and the reference significance of the measurement result on the effectiveness measurement of the carbon source is limited. Thus, the shorter the time consuming method for determining the availability of a carbon source, the more direct the response to the activated sludge activity, and the greater the significance of its knowledge in the production run.
The methods of the prior art often measure the effectiveness of the carbon source by instrumental measurements. However, the carbon source materials used in the actual production are generally industrial byproducts, have more than one effective component and instable content, often contain toxic and harmful substances to the activated sludge, and are often unknown, and the components can impact the stability of the sewage treatment process. The content of the carbon source substances can be quantified only by an assay method aiming at one or a class of substances, but the detection cost for the carbon source components with unknown content is high, and the detection result cannot comprehensively and timely reflect the effectiveness of the target carbon source.
The activity of activated sludge in the target process is the most direct and rapid method for detecting carbon sources. The carbon source effectiveness can be evaluated by using the oxygen consumption rate (OUR) of the biological activated sludge, but the OUR determination method is extensive at present, the influence of temperature on the measurement result is not considered, and the microbial metabolic activity can be increased by about 12% for each 1 ℃ rise of the temperature. The detection time of the OUR comparison experiment is often longer, the change of the environmental temperature has great influence on the sludge activity, and the measurement result of the OUR cannot reflect the effectiveness of the carbon source really. In addition, in the traditional OUR calculation process, two points are usually selected from a dissolved oxygen attenuation curve, and the slope of a straight line where the two points are located is calculated. The calculation method is greatly influenced by the selection of the calculation points, and the calculation results of different points are greatly different. The method for measuring the sludge oxygen consumption rate comprises the following steps:
however, in the measurement and calculation methods of the sludge oxygen consumption rate and the specific oxygen consumption rate (source) reported in the previous studies, the ratio of the amount of dissolved oxygen in the water consumed by microorganisms in the activated sludge (unit quantity) to the time is generally used as:
it can be known from fig. 1 that the numerical meanings of the two points are different, in the traditional calculation process, two points on the dissolved oxygen attenuation curve are usually selected, the slope of the straight line where the two points are located is calculated, and the calculation method is greatly influenced by the selection of the metering point, as shown in fig. 1 (t)1，Y2) And (t)2，Y1) Corresponding K1，(t1，Y2) And (t ″)2，Y`1) Corresponding K2，(t`1，Y`2) And (t ″)2，Y`1) Corresponding to K3The different point calculation results differ greatly.
The specific oxygen consumption rate (SOUR) is also used for evaluating the effectiveness of the carbon source in the prior art, but the SOUR reflects the activity change trend of single living microorganisms in the activated sludge, and the detection method ignores the influence of the sludge concentration on the response result. And because the sludge concentration in each process section is often unstable, the MLSS measurement result water of an individual point can not reflect the whole condition of the active sludge process, and the detection result is often large in error.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the background art, the utility model discloses equipment for rapidly determining the effectiveness of an external carbon source of a sewage treatment plant.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the equipment for rapidly determining the performance of the added carbon source of the sewage treatment plant comprises a constant-temperature water bath system, a main reaction system and a detection control system; the constant-temperature water bath system comprises a constant-temperature water bath tank, a water bath heater, a temperature measuring electrode, a flow making circulating pump and electromagnetic stirrers, wherein the constant-temperature water bath tank forms a water bath heating container; the main reaction system comprises a plurality of pre-reaction bottles and a plurality of reaction bottles, the pre-reaction bottles and the reaction bottles are placed in a constant-temperature water bath when working, the positions of the pre-reaction bottles and the reaction bottles correspond to those of an electromagnetic stirrer, stirrers are respectively arranged in the pre-reaction bottles and the reaction bottles, the pre-reaction bottles are also provided with gas distributors, the gas distributors are connected with external explosion pumps through pipelines, and dissolved oxygen electrodes are respectively arranged corresponding to the pre-reaction bottles and the reaction bottles; the detection control system comprises a control module and an interactive display device, the control module is respectively connected with the water bath heater, the temperature measuring electrode, the flow-making circulating pump, the electromagnetic stirrer, the dissolved oxygen electrode and the interactive display module, the control module controls all parts to work and carries out data processing, and the interactive display module realizes the control information input and the detection result display of an operator to the equipment.
The technical scheme can also adopt the following technical measures:
the constant-temperature water bath is internally provided with a reaction bottle limiting plate, the reaction bottle limiting plate is provided with a plurality of limiting holes, and the limiting holes correspond to the positions of the electromagnetic stirrers one by one.
The pre-reaction bottle and the reaction bottle respectively comprise a threaded bottle cap and a threaded glass bottle body, and the dissolved oxygen electrodes are respectively arranged on the threaded bottle caps.
The constant-temperature water bath tank comprises a tank body and a heat-preservation sealing cover, wherein the heat-preservation sealing cover is combined with the tank body to form a water bath space.
The ratio of the volume of the pre-reaction bottle to the volume of a single reaction bottle is (6-10): 1.
due to the adoption of the technical scheme, the utility model has the following beneficial effects:
the equipment for rapidly determining the effectiveness of the external carbon source of the sewage treatment plant comprises a constant-temperature water bath system, a main reaction system and a detection control system, does not need to be attended by a special person during the operation of the equipment, realizes the regulation and control of temperature, the online and measurement and the automatic judgment of various data through a control module control system, provides performance early warning and process adjustment suggestions for operators, and has high efficiency; meanwhile, the structure is simple, the size is small, the space is saved, the operation is simple and convenient, and the maintenance is easy.
Drawings
FIG. 1 is a graphical representation of the results of a prior art method for determining the effectiveness of an added carbon source for oxygen consumption rate;
FIG. 2 is a schematic structural diagram of an apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant according to the present invention
FIG. 3 is a schematic structural diagram of a pre-reaction bottle in the apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant according to the present invention;
FIG. 4 is a schematic structural diagram of a reaction flask in the apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant according to the present invention;
FIG. 5 is a flow chart of the operation of the apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant according to the present invention;
FIG. 6 is a schematic diagram of a dissolved oxygen decay curve during operation of the apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant according to the present invention.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
As shown in fig. 2 to 4, the apparatus for rapidly determining the effectiveness of an external carbon source in a sewage treatment plant of the present invention comprises a constant temperature water bath system, a main reaction system and a detection control system; the constant-temperature water bath system comprises a constant-temperature water bath 1, a water bath heater 3, a temperature measuring electrode 11, a flow making circulating pump 4 and electromagnetic stirrers 2, wherein the constant-temperature water bath forms a water bath heating container, the water bath heater, the temperature measuring electrode and the flow making circulating pump are arranged in the constant-temperature water bath, the flow making circulating pump can ensure that water in the water bath can flow and keep the temperature at each position to be rapidly balanced, and the electromagnetic stirrers are arranged outside the constant-temperature water bath; the main reaction system comprises a plurality of pre-reaction bottles 12 and reaction bottles 6, the pre-reaction bottles and the reaction bottles are arranged in a constant temperature water bath when working, the positions of the pre-reaction bottles and the reaction bottles correspond to those of the electromagnetic stirrer 2, stirrers 10 are respectively arranged in the pre-reaction bottles and the reaction bottles, the pre-reaction bottles are also provided with gas distributors 14, the gas distributors are annular and are connected with external explosion pumps 13 through pipelines, and dissolved oxygen electrodes 7 are respectively arranged corresponding to the pre-reaction bottles and the reaction bottles; the detection control system comprises a control module and an interactive display device 9, the control module is respectively connected with the water bath heater, the temperature measuring electrode, the flow-making circulating pump, the electromagnetic stirrer, the dissolved oxygen electrode and the interactive display module, the control module controls all parts to work and carries out data processing, and the interactive display module realizes the control information input and the detection result display of an operator to the equipment.
The constant-temperature water bath tank adopts an arc-shaped tank wall, can form vortex-shaped water flow, is favorable for reducing dead angles in the tank body, and ensures uniform and stable temperature in the tank body.
The reaction bottle limiting plate 5 is arranged in the constant-temperature water bath, the reaction bottle limiting plate is provided with a plurality of limiting holes, the limiting plate is fixedly arranged in the constant-temperature water bath at constant temperature during use, the limiting holes correspond to the positions of the electromagnetic stirrers one by one, and the reaction bottles can be respectively placed in the limiting holes to ensure that the stirrers in the reaction bottles can be driven by the electromagnetic stirrers.
The pre-reaction bottle and the reaction bottle respectively comprise a threaded bottle cap and a threaded glass bottle body, the dissolved oxygen electrodes 7 are respectively arranged on the threaded bottle caps, the convenience of operation is improved, the step of putting the dissolved oxygen electrodes into the pre-reaction bottle and the step of putting the dissolved oxygen electrodes into the pre-reaction bottle are not needed, and only the threaded bottle caps are matched with the threaded glass bottle bodies.
The constant temperature water bath includes cell body and heat preservation closing cap, and the inside water bath space that forms that combines together of heat preservation closing cap and cell body can combine heat preservation closing cap and cell body to seal during the detection to keep the constancy of temperature in the constant temperature water bath, avoid the external interference that causes.
The ratio of the volume of the pre-reaction bottle to the volume of the single reaction bottle is (6-10): 1, to ensure that the liquid in the pre-reaction bottle can be distributed in a plurality of different reaction bottles for comparison and reference.
As shown in fig. 5 and 6, in the method for rapidly determining the effectiveness of the external carbon source in the sewage treatment plant, the standard carbon source is selected, the subsequent detection result is converted into the equivalent value of the standard carbon source, and the effectiveness of the carbon source to be detected is detected by the equivalent value; the change trend of the sludge activity is represented by a sludge activity index kappa, the numerical meaning of the sludge activity index kappa is the product of the inverse of the integral of the oxygen saturation attenuation curve and time and an activated sludge constant, namely:
wherein f (t) is the attenuation function of the oxygen saturation degree with time and the sludge activity constant N0＝1000-100000，Y2＝f(t1)＝50％～100％，Y1＝f(t2)＝0％～50％。
The dissolved oxygen saturation refers to the percentage of the measured value of the dissolved oxygen in the water body under a certain temperature condition to the saturated dissolved oxygen of the distilled water under the temperature condition.
The method for rapidly determining the effectiveness of the external carbon source of the sewage treatment plant comprises the following steps:
A. setting an integration step t by an interactive display modulesSludge activity constant N0And a set value Y1、Y2Setting a target dissolved oxygen value DO0A set temperature value T0Aeration step length t1Temperature control step length t2Set value dissolved oxygen value DO1、DO2；
B. Starting the equipment through the interactive display module, and respectively starting the water bath heater and the flow-making circulating pump to operate;
C. adding the sludge in the aerobic tank into a pre-reaction bottle, wherein the sludge is added to 80% of the total volume of the pre-reaction bottle;
D. placing a pre-reaction bottle into a constant-temperature water bath, wherein the bottom position of the pre-reaction bottle corresponds to an electromagnetic stirrer, placing a stirrer into the pre-reaction bottle, and starting the electromagnetic stirrer to drive the stirrer to stir sludge in the pre-reaction bottle;
E. the aeration pump is started, and the step length of aeration is t1Controlling the dissolved oxygen content in the pre-reaction bottle at the dissolved oxygen value DO by the dissolved oxygen electrode and the aeration pump0(ii) a Starting the water bath heater, and controlling the temperature with the step length of t2Controlling the temperature of the water bath in the water bath reaction tank to be a set temperature value T through the temperature measuring electrode and the water bath heater0；
F. Stopping aeration when the liquid in the pre-reaction bottle simultaneously meets the following conditions: temperature of T0Plus or minus 0.5 ℃, the dissolved oxygen value reaches the set value DO0；
G. Liquid in the pre-reaction bottles is equally distributed into each reaction bottle, a stirrer is respectively placed into each reaction bottle, and the electromagnetic stirrer is started to drive the stirrer to stir the liquid in the reaction bottles;
H. adding standard carbon source liquid into a reaction bottle to serve as a standard reaction bottle, and adding carbon source liquid to be detected with the same volume into other reaction bottles respectively;
I. starting the water bath heater, wherein the temperature control step length time is t2Passing through a temperature measuring electrode and a water bath heater (3)
Controlling the temperature of the water bath in the water bath reaction tank to be a set temperature value T0；
J. The control module detects and judges whether the dissolved oxygen value DO in each reaction bottle reaches a set value DO through the dissolved oxygen electrode1Recording the arrival of the detected value of the dissolved oxygen electrode at DO1At time t0Record t0The later dissolved oxygen value DO;
K. according to the integration step tsCalculating an integral area, and displaying a dissolved oxygen attenuation curve in an interactive display module;
l, the control module judges whether the dissolved oxygen value DO in each reaction bottle reaches a set value DO or not through the detection of the dissolved oxygen electrode2To DO2Stopping integral calculation;
m, arranging the results in each reaction bottle according to the kappa value, and displaying the sequencing results through an interactive display module;
and N, storing the integral area, the kappa value and the dissolved oxygen attenuation curve corresponding to each reaction bottle.
The utility model is not described in detail in the prior art, and it is apparent to a person skilled in the art that the utility model is not limited to details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (5)
1. A device for rapidly determining the effectiveness of an external carbon source of a sewage treatment plant is characterized by comprising a constant-temperature water bath system, a main reaction system and a determination control system; the constant-temperature water bath system comprises a constant-temperature water bath tank, a water bath heater, a temperature measuring electrode, a flow making circulating pump and electromagnetic stirrers, wherein the constant-temperature water bath tank forms a water bath heating container; the main reaction system comprises a plurality of pre-reaction bottles and a plurality of reaction bottles, the pre-reaction bottles and the reaction bottles are arranged in a constant-temperature water bath when working, the positions of the pre-reaction bottles and the reaction bottles correspond to those of an electromagnetic stirrer, stirrers are respectively arranged in the pre-reaction bottles and the reaction bottles, the pre-reaction bottles are also provided with gas distributors, the gas distributors are connected with external explosion pumps through pipelines, and the corresponding pre-reaction bottles and the reaction bottles are respectively provided with dissolved oxygen electrodes; the measurement control system comprises a control module and an interactive display device, wherein the control module is respectively connected with the water bath heater, the temperature measuring electrode, the flow making circulating pump, the electromagnetic stirrer, the dissolved oxygen electrode and the interactive display module, and the interactive display module comprises an input device and a display.
2. The apparatus for rapidly determining the effectiveness of an external carbon source applied to a sewage treatment plant according to claim 1, wherein: a reaction bottle limiting plate is arranged in the constant-temperature water bath, a plurality of limiting holes are formed in the reaction bottle limiting plate, and the limiting holes correspond to the positions of the electromagnetic stirrers one by one.
3. The apparatus for rapidly determining the effectiveness of an external carbon source applied to a sewage treatment plant according to claim 2, wherein: the pre-reaction bottle and the reaction bottle respectively comprise a threaded bottle cap and a threaded glass bottle body, and the dissolved oxygen electrodes are respectively arranged on the threaded bottle caps.
4. The apparatus for rapidly determining the effectiveness of an external carbon source applied to a sewage treatment plant according to claim 3, wherein: the constant-temperature water bath tank comprises a tank body and a heat-preservation sealing cover, and the heat-preservation sealing cover is combined with the tank body to form a water bath space.
5. The apparatus for rapidly determining the effectiveness of an external carbon source applied to a sewage treatment plant according to claim 4, wherein: the ratio of the volume of the pre-reaction bottle to the volume of the single reaction bottle is (6-10): 1.
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