CN111392868A - Anti-blocking early warning system and method for constructed wetland - Google Patents
Anti-blocking early warning system and method for constructed wetland Download PDFInfo
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- CN111392868A CN111392868A CN202010254941.3A CN202010254941A CN111392868A CN 111392868 A CN111392868 A CN 111392868A CN 202010254941 A CN202010254941 A CN 202010254941A CN 111392868 A CN111392868 A CN 111392868A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
Abstract
The invention discloses an artificial wetland anti-clogging early warning system and method, wherein the early warning system comprises a sample sewage experiment module, a to-be-purified water source purification condition acquisition module and an early warning information output module, the sample sewage experiment module is used for acquiring the purification treatment condition of the artificial wetland on sample sewage, the to-be-purified water source purification condition acquisition module is used for acquiring the initial purification treatment condition of the artificial wetland on the to-be-purified sewage and the purification treatment condition of the artificial wetland on the to-be-treated sewage after a plurality of detection periods, the early warning information output module outputs the early warning information of the artificial wetland according to the information acquired by the to-be-purified water source purification condition acquisition module, and the sample sewage experiment module comprises a pre-purification sample data acquisition module, a purified sample data acquisition module and a first reference change rate calculation module.
Description
Technical Field
The invention relates to the field of constructed wetlands, in particular to an anti-blocking early warning system and method for the constructed wetlands.
Background
The artificial wetland is a technology for treating sewage and sludge by using the physical, chemical and biological triple synergistic action of soil, artificial medium, plants and microorganisms in the process of flowing along a certain direction by using sewage and sludge which are controllably dosed to the artificially constructed wetland from the artificially constructed and controlled-operation ground similar to the marshland. After the operation time of the artificial wetland is too long, the wetland substrate is easy to block, the sewage treatment effect of the wetland is reduced, and even the operation life of the artificial wetland is possibly shortened.
Disclosure of Invention
The invention aims to provide an anti-blocking early warning system and method for an artificial wetland, which aim to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an constructed wetland prevents blockking up early warning system reaches, early warning system includes sample sewage experiment module, treats that the purification of water source condition obtains module and early warning information output module, sample sewage experiment module is used for obtaining the purification treatment condition of constructed wetland to sample sewage, treat that purification water source purification condition obtains the module and is used for obtaining the initial purification treatment condition of constructed wetland to the sewage of treating purifying and the purification treatment condition of constructed wetland to the sewage after a plurality of detection period, the early warning information output module is according to the early warning information of the information output constructed wetland that the purification water source condition of treating purifying obtained the module and acquireing.
Preferably, the sample sewage experiment module comprises a sample data acquisition module before purification, a sample data acquisition module after purification and a first reference change rate calculation module, wherein the sample data acquisition module before purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements before the sample sewage is purified by the artificial wetland, the sample data acquisition module after purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements after the sample sewage is purified by the artificial wetland, and the first reference change rate calculation module calculates a first reference change rate of nitrogen elements and a first reference change rate of phosphorus elements according to the average content of nitrogen elements and the average content of phosphorus elements before and after purification.
Preferably, the water source purification situation acquisition module to be purified comprises an initial purification data acquisition module, a suspended matter content judgment module, an oxygen content judgment module, a second reference change rate calculation module, a comprehensive reference change rate calculation module, a detection purification data acquisition module, a second blockage index calculation module and a third blockage index calculation module, wherein the initial purification data acquisition module acquires the average content of suspended matters, the average dissolved content of oxygen, the content of nitrogen and the content of phosphorus in the water source to be purified from the water inlet of the artificial wetland, and acquires the content of nitrogen and the content of phosphorus from the water outlet of the artificial wetland, the suspended matter content judgment module compares the average content of suspended matters acquired by the initial purification data acquisition module with the average content threshold of suspended matters, and reminds a worker to preprocess the water source to be purified when the average content of suspended matters is greater than or equal to the average content threshold of suspended matters, the oxygen content judgment module compares the average dissolved oxygen content acquired by the initial purification data acquisition module with an average dissolved oxygen threshold value, and accordingly obtains a first blockage index, the second reference change rate calculation module calculates a second reference nitrogen change rate and a second reference phosphorus change rate according to the nitrogen content and the phosphorus content acquired by the initial purification data acquisition module at the artificial wetland inlet and outlet, the comprehensive reference change rate calculation module calculates a comprehensive reference nitrogen change rate and a comprehensive reference phosphorus change rate according to the first reference change rate and the second reference change rate, the detection purification data acquisition module comprises a nitrogen and phosphorus content acquisition module and a temperature acquisition module, and the nitrogen and phosphorus content acquisition module is used for acquiring the nitrogen content and the phosphorus content of the artificial wetland outlet after a plurality of detection periods, the temperature acquisition module is used for acquiring average temperature of each day in a plurality of detection periods, the second blockage index calculation module calculates a second blockage index according to the nitrogen element change rate, the phosphorus element change rate, the nitrogen element comprehensive reference change rate and the phosphorus element comprehensive reference change rate, and the third blockage index calculation module calculates a third blockage index according to the relation between the average temperature of each day and 10-20 ℃; the early warning information output module comprises an early warning index calculation module and an early warning index comparison module, the early warning index calculation module calculates an early warning index according to the first blockage index, the second blockage index and the third blockage index, and the early warning index comparison module compares the early warning index with an early warning index threshold value and outputs early warning information when the early warning index is larger than or equal to the early warning index threshold value.
An anti-blocking early warning method for an artificial wetland comprises the following steps:
step S1: obtaining the purification treatment condition of the constructed wetland on the sample sewage;
step S2: acquiring the initial purification treatment condition of the sewage to be purified of the artificial wetland;
step S3: presetting a detection period T (unit: day), and after n detection periods are separated, wherein the value of n is a natural number, acquiring the purification treatment condition of the artificial wetland to-be-treated sewage at the moment and outputting the early warning information of the artificial wetland.
Preferably, the step S1 further includes:
selecting a certain amount of sample sewage of M in advance, setting the average content Ny1 of nitrogen elements and the average content Py1 of phosphorus elements in the sample sewage, purifying the certain amount of sample sewage through the artificial wetland, collecting the purified sample sewage from a water outlet of the artificial wetland, collecting the average content Ny2 of nitrogen elements and the average content Py2 of phosphorus elements in the purified sample sewage when a certain amount of sample sewage of M is collected at the water outlet of the artificial wetland, and calculating a first reference change rate Cs1= (Ny1-Ny2)/Ny1 of nitrogen elements and a first reference change rate Ds1= (Py1-Py2)/Py1 of phosphorus elements.
Preferably, the step S2 further includes:
collecting the average content Xb of suspended matters in a water source to be purified from the water inlet of the artificial wetland, judging whether the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters,
if the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters, reminding a manager that the pretreatment for removing the suspended matters is carried out on the water source to be purified firstly;
if the average content Xb of the suspended matters is smaller than the average content threshold of the suspended matters, acquiring the average dissolved oxygen content Ob, the nitrogen element content Nb and the phosphorus element content Pb of a water source to be purified at a water inlet, judging whether the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, if the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, judging that a first blockage index X = (Oy-Ob)/Oy, and if not, judging that the first blockage index X = 0;
collecting the content Na0 of nitrogen elements and the content Pa0 of phosphorus elements at the effluent of the artificial wetland, calculating a second reference change rate Cs2= (Nb-Na0)/Nb of nitrogen elements, a second reference change rate Ds2= (Pb-Pa1)/Pb1 of phosphorus elements,
then the overall reference rate of change of nitrogen Cz =0.4 Cs1+0.6 Cs2 and the overall reference rate of change of phosphorus Dz =0.4 Ds1+0.6 Ds 2.
Preferably, the step S3 further includes: step S31: after n detection periods, collecting the nitrogen element content Nan and the phosphorus element content Pan at the effluent of the artificial wetland,
after n detection periods are calculated, the nitrogen element change rate Csn = (Nb-Nan)/Nb, the phosphorus element change rate Dsn = (Pb-Pan)/Pb,
then calculating a second occlusion index Y =0.5 (Cz-Csn)/Cz +0.5 (Dz-Dsn)/Dz;
step S32: collecting the average temperature of the environment of the constructed wetland every day in the n detection periods,
if the average temperature in 40% of the days is 10 degrees or less, the day with the average temperature of 10 degrees or less is screened out, and the average temperature Td on the screened-out day is calculated, then the third clogging index Z = (10-Td)/10,
otherwise, if the average temperature in 60% of the days is greater than 20 degrees, screening out the days with the average temperature of greater than or equal to 20 degrees, and calculating the average temperature Tg of the screened-out days, then the third clogging index Z = (Tg-20)/20,
otherwise the third clogging index Z = 0;
step S33: and calculating an early warning index U = 0.3X + 0.5Y + 0.2Z, and reminding a manager that the constructed wetland needs to be nursed when the early warning index is greater than or equal to an early warning index threshold value so as to prevent the constructed wetland from further deteriorating and blocking.
Preferably, the duration of one detection period in step S3 is 14 days.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, whether the constructed wetland has a blockage precursor is judged by collecting the oxygen content in the sewage to be purified, collecting the temperature of the environment where the constructed wetland is located and comparing the contents of nitrogen and phosphorus before and after the sewage to be purified is purified, so that the constructed wetland is repaired in time before the constructed wetland is blocked, and the service life of the constructed wetland is prolonged.
Drawings
FIG. 1 is a schematic block diagram of an anti-clogging early warning system for an artificial wetland according to the present invention;
fig. 2 is a schematic flow diagram of the anti-clogging early warning method for the constructed wetland.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in the embodiment of the invention, the early warning system comprises a sample sewage experiment module, a to-be-purified water source purification condition acquisition module and an early warning information output module, wherein the sample sewage experiment module is used for acquiring the purification treatment condition of the sample sewage by the artificial wetland, the to-be-purified water source purification condition acquisition module is used for acquiring the initial purification treatment condition of the sewage to be purified by the artificial wetland and the purification treatment condition of the sewage to be treated by the artificial wetland after a plurality of detection periods, and the early warning information output module outputs the early warning information of the artificial wetland according to the information acquired by the to-be-purified water source purification condition acquisition module.
The sample sewage experiment module comprises a sample data acquisition module before purification, a sample data acquisition module after purification and a first reference change rate calculation module, wherein the sample data acquisition module before purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements before the sample sewage is purified by the artificial wetland, the sample data acquisition module after purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements after the sample sewage is purified by the artificial wetland, and the first reference change rate calculation module calculates a first reference change rate of nitrogen elements and a first reference change rate of phosphorus elements according to the average content of nitrogen elements and the average content of phosphorus elements before and after purification.
The module for acquiring the purification condition of the water source to be purified comprises an initial purification data acquisition module, a suspended matter content judgment module, an oxygen content judgment module, a second reference change rate calculation module, a comprehensive reference change rate calculation module, a detection purification data acquisition module, a second blockage index calculation module and a third blockage index calculation module, wherein the initial purification data acquisition module acquires the average content of suspended matters, the average dissolved content of oxygen, the content of nitrogen and the content of phosphorus in the water source to be purified from the water inlet of the artificial wetland, and the acquired content of nitrogen and the acquired content of phosphorus from the water outlet of the artificial wetland, the suspended matter content judgment module compares the average content of suspended matters acquired by the initial purification data acquisition module with the average content threshold of suspended matters, and reminds workers to preprocess the water source to be purified when the average content of suspended matters is more than or equal to the average content threshold of suspended matters, the oxygen content judgment module compares the average dissolved oxygen content acquired by the initial purification data acquisition module with an average dissolved oxygen threshold value, and accordingly obtains a first blockage index, the second reference change rate calculation module calculates a second reference nitrogen change rate and a second reference phosphorus change rate according to the nitrogen content and the phosphorus content acquired by the initial purification data acquisition module at the artificial wetland inlet and outlet, the comprehensive reference change rate calculation module calculates a comprehensive reference nitrogen change rate and a comprehensive reference phosphorus change rate according to the first reference change rate and the second reference change rate, the detection purification data acquisition module comprises a nitrogen and phosphorus content acquisition module and a temperature acquisition module, and the nitrogen and phosphorus content acquisition module is used for acquiring the nitrogen content and the phosphorus content of the artificial wetland outlet after a plurality of detection periods, the temperature acquisition module is used for acquiring average temperature of each day in a plurality of detection periods, the second blockage index calculation module calculates a second blockage index according to the nitrogen element change rate, the phosphorus element change rate, the nitrogen element comprehensive reference change rate and the phosphorus element comprehensive reference change rate, and the third blockage index calculation module calculates a third blockage index according to the relation between the average temperature of each day and 10-20 ℃; the early warning information output module comprises an early warning index calculation module and an early warning index comparison module, the early warning index calculation module calculates an early warning index according to the first blockage index, the second blockage index and the third blockage index, and the early warning index comparison module compares the early warning index with an early warning index threshold value and outputs early warning information when the early warning index is larger than or equal to the early warning index threshold value.
An anti-blocking early warning method for an artificial wetland comprises the following steps:
step S1: obtaining the purification treatment condition of the constructed wetland on the sample sewage:
selecting a certain amount of sample sewage of M in advance, setting the average content Ny1 of nitrogen elements and the average content Py1 of phosphorus elements in the sample sewage, purifying the certain amount of sample sewage through an artificial wetland, collecting the purified sample sewage from a water outlet of the artificial wetland, collecting the average content Ny2 of nitrogen elements and the average content Py2 of phosphorus elements in the purified sample sewage when a certain amount of sample sewage of M is collected from the water outlet of the artificial wetland, and calculating a first reference change rate Cs1= (Ny1-Ny2)/Ny1 of nitrogen elements and a first reference change rate Ds1= (Py1-Py2)/Py1 of phosphorus elements; when a certain amount M of sample sewage is selected, the suspended matter content of the sample sewage is lower than the suspended matter average content threshold value, and the oxygen dissolved content is higher than the oxygen average dissolved amount threshold value, so that an ideal state of the constructed wetland for sewage purification is obtained;
step S2: acquiring the initial purification treatment condition of the sewage to be purified of the artificial wetland:
collecting the average content Xb of suspended matters in a water source to be purified from the water inlet of the artificial wetland, judging whether the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters,
if the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters, reminding a manager that the pretreatment for removing the suspended matters is carried out on the water source to be purified firstly;
if the average content Xb of the suspended matters is smaller than the average content threshold of the suspended matters, acquiring the average dissolved oxygen content Ob, the nitrogen element content Nb and the phosphorus element content Pb of a water source to be purified at a water inlet, judging whether the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, if the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, judging that a first blockage index X = (Oy-Ob)/Oy, and if not, judging that the first blockage index X = 0;
collecting the content Na0 of nitrogen elements and the content Pa0 of phosphorus elements at the effluent of the artificial wetland, calculating a second reference change rate Cs2= (Nb-Na0)/Nb of nitrogen elements, a second reference change rate Ds2= (Pb-Pa1)/Pb1 of phosphorus elements,
then the overall reference rate of change of nitrogen Cz =0.4 Cs1+0.6 Cs2 and the overall reference rate of change of phosphorus Dz =0.4 Ds1+0.6 Ds 2.
Step S3: presetting a detection period T (unit: day), and after detecting that the artificial wetland is separated by n detection periods, acquiring the purification treatment condition of the sewage to be treated by the artificial wetland and outputting early warning information of the artificial wetland:
step S31: after n detection periods, collecting the nitrogen element content Nan and the phosphorus element content Pan at the effluent of the constructed wetland, wherein the value of n is a natural number,
after n detection periods are calculated, the nitrogen element change rate Csn = (Nb-Nan)/Nb, the phosphorus element change rate Dsn = (Pb-Pan)/Pb,
then calculating a second occlusion index Y =0.5 (Cz-Csn)/Cz +0.5 (Dz-Dsn)/Dz;
for example, when 1 detection cycle is separated, the nitrogen content of the effluent of the constructed wetland is Na1 and the phosphorus content of the effluent of the constructed wetland is Pa1, the nitrogen change rate Cs1= (Nb-Na1)/Nb, the phosphorus change rate Ds1= (Pb-Pa1)/Pb, and the second blockage index Y =0.5 = (Cz-Cs1)/Cz +0.5 = (Dz-Ds1)/Dz, during the actual operation process, the condition of purified sewage of the constructed wetland can be detected after each detection cycle, an early warning index is obtained, and whether the constructed wetland is nursed or not is judged;
step S32: collecting the average temperature of the environment of the constructed wetland every day in the n detection periods,
if the average temperature in 40% days is less than or equal to 10 ℃, screening out days with the average temperature less than or equal to 10 ℃, and calculating the average temperature Td of the screened days, wherein the third clogging index Z = (10-Td)/10, when the temperature is lower, the activity of microorganisms in the constructed wetland is lower, and the microorganisms cannot be effectively degraded in time, so that the constructed wetland is easy to clog;
otherwise, if the average temperature in 60% of days is higher than 20 ℃, screening out days with the average temperature being higher than or equal to 20 ℃, and calculating the average temperature Tg of the screened days, wherein the third blockage index Z = (Tg-20)/20, and when the temperature is higher, the growth and reproduction speed of microorganisms and plants in the artificial wetland is too high, so that the artificial wetland is easy to block;
otherwise the third clogging index Z = 0;
step S33: and calculating an early warning index U = 0.3X + 0.5Y + 0.2Z, and reminding a manager that the constructed wetland needs to be nursed when the early warning index is greater than or equal to an early warning index threshold value so as to prevent the constructed wetland from further deteriorating and blocking.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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.
Claims (8)
1. The utility model provides an anti-clogging early warning system of constructed wetland which characterized in that: the early warning system comprises a sample sewage experiment module, a to-be-purified water source purification condition acquisition module and an early warning information output module, wherein the sample sewage experiment module is used for acquiring the purification treatment condition of the constructed wetland to sample sewage, the to-be-purified water source purification condition acquisition module is used for acquiring the initial purification treatment condition of the constructed wetland to the to-be-purified sewage and the purification treatment condition of the constructed wetland to the to-be-treated sewage after a plurality of detection periods, and the early warning information output module is used for outputting the early warning information of the constructed wetland according to the information acquired by the to-be-purified water source purification condition acquisition module.
2. The anti-clogging early warning system for the constructed wetland according to claim 1, characterized in that: the sample sewage experiment module comprises a sample data acquisition module before purification, a sample data acquisition module after purification and a first reference change rate calculation module, wherein the sample data acquisition module before purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements before the sample sewage is purified by the artificial wetland, the sample data acquisition module after purification is used for acquiring the average content of nitrogen elements and the average content of phosphorus elements after the sample sewage is purified by the artificial wetland, and the first reference change rate calculation module calculates a first reference change rate of nitrogen elements and a first reference change rate of phosphorus elements according to the average content of nitrogen elements and the average content of phosphorus elements before and after purification.
3. The anti-clogging early warning system for the constructed wetland according to claim 2, characterized in that: the module for acquiring the purification condition of the water source to be purified comprises an initial purification data acquisition module, a suspended matter content judgment module, an oxygen content judgment module, a second reference change rate calculation module, a comprehensive reference change rate calculation module, a detection purification data acquisition module, a second blockage index calculation module and a third blockage index calculation module, wherein the initial purification data acquisition module acquires the average content of suspended matters, the average dissolved content of oxygen, the content of nitrogen and the content of phosphorus in the water source to be purified from the water inlet of the artificial wetland, and the acquired content of nitrogen and the acquired content of phosphorus from the water outlet of the artificial wetland, the suspended matter content judgment module compares the average content of suspended matters acquired by the initial purification data acquisition module with the average content threshold of suspended matters, and reminds workers to preprocess the water source to be purified when the average content of suspended matters is more than or equal to the average content threshold of suspended matters, the oxygen content judgment module compares the average dissolved oxygen content acquired by the initial purification data acquisition module with an average dissolved oxygen threshold value, and accordingly obtains a first blockage index, the second reference change rate calculation module calculates a second reference nitrogen change rate and a second reference phosphorus change rate according to the nitrogen content and the phosphorus content acquired by the initial purification data acquisition module at the artificial wetland inlet and outlet, the comprehensive reference change rate calculation module calculates a comprehensive reference nitrogen change rate and a comprehensive reference phosphorus change rate according to the first reference change rate and the second reference change rate, the detection purification data acquisition module comprises a nitrogen and phosphorus content acquisition module and a temperature acquisition module, and the nitrogen and phosphorus content acquisition module is used for acquiring the nitrogen content and the phosphorus content of the artificial wetland outlet after a plurality of detection periods, the temperature acquisition module is used for acquiring average temperature of each day in a plurality of detection periods, the second blockage index calculation module calculates a second blockage index according to the nitrogen element change rate, the phosphorus element change rate, the nitrogen element comprehensive reference change rate and the phosphorus element comprehensive reference change rate, and the third blockage index calculation module calculates a third blockage index according to the relation between the average temperature of each day and 10-20 ℃; the early warning information output module comprises an early warning index calculation module and an early warning index comparison module, the early warning index calculation module calculates an early warning index according to the first blockage index, the second blockage index and the third blockage index, and the early warning index comparison module compares the early warning index with an early warning index threshold value and outputs early warning information when the early warning index is larger than or equal to the early warning index threshold value.
4. An anti-blocking early warning method for an artificial wetland is characterized by comprising the following steps: the early warning method comprises the following steps:
step S1: obtaining the purification treatment condition of the constructed wetland on the sample sewage;
step S2: acquiring the initial purification treatment condition of the sewage to be purified of the artificial wetland;
step S3: and presetting a detection period T (unit: day), and after n detection periods, acquiring the purification treatment condition of the artificial wetland to-be-treated sewage at the moment and outputting the early warning information of the artificial wetland.
5. The anti-clogging early warning method for the constructed wetland according to claim 4, characterized in that: the step S1 further includes:
selecting a certain amount of sample sewage of M in advance, setting the average content Ny1 of nitrogen elements and the average content Py1 of phosphorus elements in the sample sewage, purifying the certain amount of sample sewage through the artificial wetland, collecting the purified sample sewage from a water outlet of the artificial wetland, collecting the average content Ny2 of nitrogen elements and the average content Py2 of phosphorus elements in the purified sample sewage when a certain amount of sample sewage of M is collected at the water outlet of the artificial wetland, and calculating a first reference change rate Cs1= (Ny1-Ny2)/Ny1 of nitrogen elements and a first reference change rate Ds1= (Py1-Py2)/Py1 of phosphorus elements.
6. The anti-clogging early warning method for the constructed wetland according to claim 5, characterized in that: the step S2 further includes:
collecting the average content Xb of suspended matters in a water source to be purified from the water inlet of the artificial wetland, judging whether the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters,
if the average content Xb of the suspended matters is more than or equal to the threshold value of the average content of the suspended matters, reminding a manager that the pretreatment for removing the suspended matters is carried out on the water source to be purified firstly;
if the average content Xb of the suspended matters is smaller than the average content threshold of the suspended matters, acquiring the average dissolved oxygen content Ob, the nitrogen element content Nb and the phosphorus element content Pb of a water source to be purified at a water inlet, judging whether the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, if the average dissolved oxygen content Ob is smaller than or equal to the average dissolved oxygen content threshold Oy, judging that a first blockage index X = (Oy-Ob)/Oy, and if not, judging that the first blockage index X = 0;
collecting the content Na0 of nitrogen elements and the content Pa0 of phosphorus elements at the effluent of the artificial wetland, calculating a second reference change rate Cs2= (Nb-Na0)/Nb of nitrogen elements, a second reference change rate Ds2= (Pb-Pa1)/Pb1 of phosphorus elements,
then the overall reference rate of change of nitrogen Cz =0.4 Cs1+0.6 Cs2 and the overall reference rate of change of phosphorus Dz =0.4 Ds1+0.6 Ds 2.
7. The anti-clogging early warning method for the constructed wetland according to claim 6, characterized in that: the step S3 further includes:
step S31: after n detection periods, collecting the nitrogen element content Nan and the phosphorus element content Pan at the effluent of the constructed wetland, wherein the value of n is a natural number,
after n detection periods are calculated, the nitrogen element change rate Csn = (Nb-Nan)/Nb, the phosphorus element change rate Dsn = (Pb-Pan)/Pb,
then calculating a second occlusion index Y =0.5 (Cz-Csn)/Cz +0.5 (Dz-Dsn)/Dz;
step S32: collecting the average temperature of the environment of the constructed wetland every day in the n detection periods,
if the average temperature in 40% of the days is 10 degrees or less, the day with the average temperature of 10 degrees or less is screened out, and the average temperature Td on the screened-out day is calculated, then the third clogging index Z = (10-Td)/10,
otherwise, if the average temperature in 60% of the days is greater than 20 degrees, screening out the days with the average temperature of greater than or equal to 20 degrees, and calculating the average temperature Tg of the screened-out days, then the third clogging index Z = (Tg-20)/20,
otherwise the third clogging index Z = 0;
step S33: and calculating an early warning index U = 0.3X + 0.5Y + 0.2Z, and reminding a manager that the constructed wetland needs to be nursed when the early warning index is greater than or equal to an early warning index threshold value so as to prevent the constructed wetland from further deteriorating and blocking.
8. The anti-clogging early warning method for the constructed wetland according to claim 7, characterized in that: the duration of one detection period in step S3 is 14 days.
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| CN112861323A (en) * | 2021-01-15 | 2021-05-28 | 河海大学 | Method for calculating biological blockage of constructed wetland |
| CN115712286A (en) * | 2022-11-29 | 2023-02-24 | 淮北师范大学 | Sewage treatment supervisory system for constructed wetland |
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| CN112374612A (en) | 2021-02-19 |
| CN112374612B (en) | 2022-07-29 |
| CN111392868B (en) | 2020-12-22 |
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