CN111285474A - Method for purifying water by using composite biological agent - Google Patents
Method for purifying water by using composite biological agent Download PDFInfo
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- CN111285474A CN111285474A CN202010194153.XA CN202010194153A CN111285474A CN 111285474 A CN111285474 A CN 111285474A CN 202010194153 A CN202010194153 A CN 202010194153A CN 111285474 A CN111285474 A CN 111285474A
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F3/02—Aerobic processes
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a method for treating water pollution, in particular to a method for purifying water by using a composite biological agent, which comprises the following steps: drying walnut shells, grinding the walnut shells into particles, heating the walnut shells at the temperature of 650-710 ℃ for 7-10 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid to react for 0.5-1 hour, washing the walnut shells with distilled water, soaking the walnut shells in a hydrochloric acid solution for 0.5-1 hour, washing the walnut shells with alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 10-20 hours to obtain walnut shell particles; mixing the dinoflagellate, the chaetoceros and the phosphorus-accumulating bacteria to prepare a biological microbial agent, and determining a corresponding feeding mode according to the phosphorus content in the detected water. The method plays a role in synergistic phosphorus removal by putting the stigmatocystis, chaetoceros, phosphorus-accumulating bacteria and walnut shell particles so as to achieve the purpose of quickly purifying water quality.
Description
Technical Field
The invention relates to a method for treating water pollution, in particular to a method for purifying water by using a composite biological agent.
Background
At present, the requirement of the current society on water quality environment treatment is more and more strict, and the polluted water cannot be treated immediately. The biological phosphorus removal of sewage mainly utilizes the functions of phosphorus-accumulating bacteria (belonging to the genus Acinetobacter, Aeromonas, Pseudomonas and the like) to release phosphorus under the anaerobic condition and accumulate phosphorus under the aerobic condition. The sewage dephosphorization comprises biological dephosphorization and chemical dephosphorization, while the chemical dephosphorization comprises two necessary processes, firstly, soluble phosphorus-containing substances in the sewage are converted into insoluble granular forms, and granular solids are removed to achieve the aim of sewage dephosphorization, the biological dephosphorization is to excessively enrich the phosphorus in the wastewater through functional microorganisms, the removal effect is ideal, the environment is friendly, the activated sludge rich in phosphorus is treated to realize the recovery of phosphorus resources, and the method has high value.
However, in the existing biological phosphorus removal, a phosphorus removal agent is artificially added, and a lot of unstable factors can be increased by artificially adding the phosphorus removal agent, for example, a proper amount of composite biological agent cannot be added in a specific area. At present, the composite biological agent for phosphorus removal is prepared by mixing anaerobic and aerobic phosphorus removal microorganisms.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides a method for rapidly purifying water quality by putting synechocystis, chaetoceros, phosphorus-accumulating bacteria and walnut shell particles and exerting the synergistic dephosphorization effect.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a method for purifying water by using a composite biological agent comprises the following steps:
s1 preparation of the composite biological agent:
s11 preparation of walnut shell particles: drying walnut shells, grinding the walnut shells into particles with the diameter of 10-40 mm, heating the walnut shells at the temperature of 650-710 ℃ for 7-10 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 2-3% of the walnut shells to react for 0.5-1 hour, washing the walnut shells cleanly with distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 0.5-1 hour, washing the walnut shells with alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 10-20 hours to obtain walnut shell particles;
s12 preparation of biological agent: mixing the conidiophora, the chaetoceros and the phosphorus-accumulating bacteria to prepare a biological microbial agent, wherein the content of the conidiophora in the biological microbial agent is 0.1-0.3 g/L, the content of the chaetoceros is 0.1-0.3 g/L and the content of the phosphorus-accumulating bacteria is 0.8-1.5 g/L;
s2 putting in the polluted water area: detecting the phosphorus content in the water, and determining a putting mode;
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 12-24 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 24-60 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 36-60 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 36-60 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): 50-100 ml of biological agent and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60-100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 50-75 ml of phosphorus-accumulating bacteria with the concentration of 0.8-1.5 g/L and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36-60 hours;
selecting a fifth putting mode when the phosphorus content in the water is 0.02-0.1 mg/L; putting 50-100 g of the obtained walnut shell particles per square meter of water surface area for dephosphorization for 36-60 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
Further, step S2, an automatic dispensing system is adopted, wherein the automatic dispensing system comprises a water quality flow data monitor, a biological agent storage barrel, a walnut shell particle storage barrel, a control valve and a master control platform;
the water quality flow data monitor comprises a probe, wherein the probe is arranged in a water quality pollution area at intervals of 2 meters, and the probe is communicated with a biological agent storage barrel and a walnut shell particle storage barrel through more than one pipeline; the water quality flow data monitor sends the water quality data obtained by monitoring through the probe to the main control platform; the main control platform sends a corresponding instruction of adding the biological agent and the walnut shell particulate matter to the control valve according to the received water quality data;
the control valve is arranged on the pipeline and comprises a valve body and a controller connected with the valve body, and the controller comprises a volume measuring module, an automatic putting module and a wireless communication module; the volume measuring module and the automatic putting module are connected with the main control platform through the wireless communication module;
the volume measuring module is connected with the main control platform through the wireless communication module, and is used for receiving an instruction for measuring the volume of the biological agent in the biological agent storage barrel and the volume of the walnut shell particles in the walnut shell particles storage barrel and feeding back the measured volume to the main control platform;
the automatic releasing module is used for receiving a releasing instruction of the main control platform through the wireless communication module and controlling the opening of the valve body.
Furthermore, mesh bags are transversely arranged in the water quality pollution area along the longitudinal direction of the water quality pollution area every 2 meters, and the mesh diameter of each mesh bag is smaller than that of walnut shell particles; the mesh bag comprises an upper end part and a lower end part, a water-resisting layer is arranged on the inner side of the upper end part, a plurality of compartments are arranged on the lower end part, each compartment is provided with a channel communicated with the upper end part, and the surface of the mesh bag is enabled to adsorb active carbon through a hot melting mode to form an active carbon layer; the pipeline discharge port of the biological agent in the biological phosphorus removal system is arranged in the upper end part through the opening of the mesh bag.
Further, the upper end part of the mesh bag is kept on the water level of the water quality pollution area.
(III) advantageous effects
The invention has the beneficial effects that:
according to the compound biological agent, the biological agent and total phosphorus in a water quality pollution area can generate insoluble precipitates, phosphorus can be separated out, and meanwhile, formed flocculating constituents have an adsorption removal effect on the phosphorus. The high-efficiency biological agent is put in by utilizing the synergistic effect of the granular matters of the stigmatocystis, the chaetoceros and the phosphorus-accumulating bacteria walnut shells, so as to achieve the aim of quickly and efficiently purifying the polluted water body. By adding the biological agent, a green water body taking the stigmata, the chaetoceros and the phosphorus accumulating bacteria as dominant ethnic groups can be formed in the water. The phosphorus accumulating bacteria decompose organic matters in the polluted water body, the spodoptera and the chaetoceros utilize nutrient substances generated by the phosphorus accumulating bacteria to decompose the organic matters to carry out photosynthesis, and in addition, the efficient walnut shell particles prepared by dephosphorization can effectively combine organic pollutants and generated insoluble precipitates to purify water quality so as to improve the activity of the phosphorus accumulating bacteria. Meanwhile, oxygen released by photosynthesis of the stigmata and the chaetoceros can promote metabolism of aerobic bacteria, and the oxygen and the aerobic bacteria cooperate with each other to effectively remove organic matters and N, P in water and achieve the aim of inhibiting growth and propagation of other harmful algae.
Drawings
FIG. 1 is a schematic diagram of the connection of an automatic dispensing system of the present invention;
fig. 2 is a schematic structural view of the mesh bag of the present invention.
Reference numerals:
1-an upper end; 2-lower end; 3-a compartment; 4-channel.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
The embodiment provides a method for purifying water by using a composite biological agent, which comprises the following steps:
s1 preparation of the composite biological agent:
s11 preparation of walnut shell particles: drying walnut shells, grinding the walnut shells into particles with the diameter of 10-40 mm, heating the walnut shells at the temperature of 650-710 ℃ for 7-10 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 2-3% of the walnut shells to react for 0.5-1 hour, washing the walnut shells cleanly with distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 0.5-1 hour, washing the walnut shells with alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 10-20 hours to obtain walnut shell particles;
s12 preparation of biological agent: mixing the conidiophora, the chaetoceros and the phosphorus-accumulating bacteria to prepare a biological microbial agent, wherein the content of the conidiophora in the biological microbial agent is 0.1-0.3 g/L, the content of the chaetoceros is 0.1-0.3 g/L and the content of the phosphorus-accumulating bacteria is 0.8-1.5 g/L;
s2 putting in the polluted water area: detecting the phosphorus content in the water, and determining a putting mode;
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 12-24 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 24-60 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 36-60 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 36-60 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): 50-100 ml of biological agent and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60-100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 50-75 ml of phosphorus-accumulating bacteria with the concentration of 0.8-1.5 g/L and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36-60 hours;
selecting a fifth putting mode when the phosphorus content in the water is 0.02-0.1 mg/L; putting 50-100 g of the obtained walnut shell particles per square meter of water surface area for dephosphorization for 36-60 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
According to the composite biological agent put in the embodiment, the biological agent and total phosphorus in a water quality pollution area can generate insoluble precipitates, phosphorus can be separated out, and meanwhile, formed flocculating constituents have an adsorption removal effect on the phosphorus. The high-efficiency biological agent is put in by utilizing the synergistic effect of the granular matters of the stigmatocystis, the chaetoceros and the phosphorus-accumulating bacteria walnut shells, so as to achieve the aim of quickly and efficiently purifying the polluted water body. By adding the biological agent, a green water body taking the stigmata, the chaetoceros and the phosphorus accumulating bacteria as dominant ethnic groups can be formed in the water. The phosphorus accumulating bacteria decompose organic matters in the polluted water body, the spodoptera and the chaetoceros utilize nutrient substances generated by the phosphorus accumulating bacteria to decompose the organic matters to carry out photosynthesis, and in addition, the efficient walnut shell particles prepared by dephosphorization can effectively combine organic pollutants and generated insoluble precipitates to purify water quality so as to improve the activity of the phosphorus accumulating bacteria. Meanwhile, oxygen released by photosynthesis of the stigmata and the chaetoceros can promote metabolism of aerobic bacteria, and the oxygen and the aerobic bacteria cooperate with each other to effectively remove organic matters and N, P in water and achieve the aim of inhibiting growth and propagation of other harmful algae. In addition, in the embodiment, different compound biological agent feeding modes are adopted according to the water quality pollution degree, and the compound biological agent feeding mode is adjusted along with the pollution degree of a water quality pollution area so as to achieve efficient purification, reduce the waste of the compound biological agent, and avoid secondary pollution to water quality caused by excessive feeding of the compound biological agent.
For more precise and efficient control of the delivery method, in step S2, the present invention employs an automatic delivery system, which may be, but is not limited to, the following automatic delivery system. As shown in fig. 1, the automatic dispensing system comprises a water quality and flow data monitor, a biological agent storage barrel, a walnut shell particle storage barrel, a control valve and a master control platform;
the water quality flow data monitor comprises a probe, wherein the probe is arranged in a water quality pollution area at intervals of 2 meters, and the probe is communicated with a biological agent storage barrel and a walnut shell particle storage barrel through more than one pipeline; the water quality flow data monitor sends the water quality data obtained by monitoring through the probe to the main control platform; the main control platform sends a corresponding instruction of adding the biological agent and the walnut shell particulate matter to the control valve according to the received water quality data;
the control valve is arranged on the pipeline and comprises a valve body and a controller connected with the valve body, and the controller comprises a volume measuring module, an automatic putting module and a wireless communication module; the volume measuring module and the automatic putting module are connected with the main control platform through the wireless communication module;
the volume measuring module is connected with the main control platform through the wireless communication module, and is used for receiving an instruction for measuring the volume of the biological agent in the biological agent storage barrel and the volume of the walnut shell particles in the walnut shell particles storage barrel and feeding back the measured volume to the main control platform;
the automatic releasing module is used for receiving a releasing instruction of the main control platform through the wireless communication module and controlling the opening of the valve body.
The water quality monitoring data of the water quality flow data monitor are recorded and counted through the master control platform, and the volume data of the biological agent storage barrel and the walnut shell particle storage barrel measured by the volume measuring module are recorded through the wireless communication module; the main control platform determines the corresponding area throwing volume through water quality monitoring data, the instruction is fed back to the controller through the wireless communication module, the automatic throwing module is enabled to open the valve body, when the throwing amount in the data fed back to the main control platform by the volume measuring module reaches the preset throwing volume, the main control platform sends the instruction for closing the valve body to the controller, and the automatic throwing module is enabled to close the valve body, so that the throwing is completed. Wherein, the wireless communication module can be bluetooth, wifi or other wireless communicable modules. The automatic feeding system can timely and properly feed the biological agent according to the condition of water quality, so that rapid and accurate biological phosphorus removal can be realized, redundant labor time consumption can be avoided, and unstable factors during manual construction can be reduced.
In order to uniformly put the composite biological agent and timely intercept insoluble precipitates, mesh bags are transversely arranged in the water quality pollution area along the longitudinal direction of the water quality pollution area every 2 meters, and the mesh diameter of each mesh bag is smaller than that of walnut shell particles; as shown in fig. 2, the mesh bag comprises an upper end portion 1 and a lower end portion 2, a water-resisting layer is arranged on the inner side of the upper end portion 1, a plurality of compartments 3 are arranged on the lower end portion 2, each compartment 3 is provided with a channel 4 communicated with the upper end portion 1, and the surface of the mesh bag is made to adsorb active carbon through a hot melting mode to form an active carbon layer; the pipeline discharge port of the biological agent in the biological phosphorus removal system is arranged in the upper end part 1 through the opening of the mesh bag.
The composite biological agent enters the upper end part 1 from the opening of the mesh bag and is separately loaded into the compartment 3 of the lower end part 2 through the channel 4, so that the uniform spraying of the biological agent is realized. Wherein the channels 4 may be a number of holes allowing the walnut shell particles to pass through. The needle bar algae, the chaetoceros and the phosphorus-accumulating bacteria can generate insoluble precipitates with phosphorus in a water quality pollution area, meanwhile, formed flocculating constituents have an adsorption removal effect on the phosphorus, the flocculating constituents are adsorbed with walnut shell particles at the lower end part 2 of the mesh bag and then retained in the mesh bag, the phosphorus can be separated out, the generated precipitates or flocculating constituents are retained by the mesh bag, and the precipitates and the like can be removed after the mesh bag is removed. Wherein, the adsorption of the active carbon on the surface of the mesh bag can improve the dephosphorization effect.
Further, the upper end 1 of the mesh bag is kept at the water level of the water pollution area.
In this embodiment, the water quality monitoring data may specifically, but not exclusively, include total phosphorus content, ammonia nitrogen content, and total oxygen content.
In the embodiment, the biological agent storage barrel and the walnut shell particle storage barrel are arranged on the land of the water quality pollution area, so that the liquid level of the biological agent storage barrel and the water level of the walnut shell particle storage barrel are higher than those of the water quality pollution area. In this embodiment, the walnut shell particles are mixed with distilled water and placed in the walnut shell particle storage barrel.
Furthermore, the pipeline is provided with an adjusting valve at one side close to the biological agent storage barrel or the walnut shell particle storage barrel. The regulating valve is a manual regulating valve and is used for avoiding other accidents such as system failure and the like. The pipeline of the biological agent storage barrel and the walnut shell particle storage barrel is provided with a slurry pump.
Example 1
The automatic feeding system comprises a water quality flow data monitor, a biological agent storage barrel, a walnut shell particle storage barrel, a control valve and a master control platform;
the water quality flow data monitor comprises a probe, wherein the probe is arranged in a water quality pollution area at intervals of 2 meters, and the probe is communicated with a biological agent storage barrel and a walnut shell particle storage barrel through more than one pipeline; the water quality flow data monitor sends the water quality data obtained by monitoring through the probe to the main control platform; the main control platform sends a corresponding instruction of adding the biological agent and the walnut shell particulate matter to the control valve according to the received water quality data;
the control valve is arranged on the pipeline and comprises a valve body and a controller connected with the valve body, and the controller comprises a volume measuring module, an automatic putting module and a wireless communication module; the volume measuring module and the automatic putting module are connected with the main control platform through the wireless communication module;
the volume measuring module is connected with the main control platform through the wireless communication module, and is used for receiving an instruction for measuring the volume of the biological agent in the biological agent storage barrel and the volume of the walnut shell particles in the walnut shell particles storage barrel and feeding back the measured volume to the main control platform;
the automatic releasing module is used for receiving a releasing instruction of the main control platform through the wireless communication module and controlling the opening of the valve body.
Example 2
The method for purifying water by using the composite biological agent comprises the following specific steps:
s1 preparation of the composite biological agent:
s11 preparation of walnut shell particles: drying walnut shells, grinding the walnut shells into particles with the diameter of 10mm, heating the walnut shells at the temperature of 650 ℃ for 8 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 2.5% of the walnut shells to react for 0.5 hour, washing the walnut shells clean by distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 0.7 hour, washing the walnut shells by using alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 10 hours to obtain walnut shell particles;
s12 preparation of biological agent: mixing the stigmata, the chaetoceros and the phosphorus accumulating bacteria to prepare a biological microbial inoculum, wherein the content of the stigmata, the content of the chaetoceros and the content of the phosphorus accumulating bacteria in the biological microbial inoculum are respectively 0.1g/L, 0.1g/L and 1 g/L;
s13, placing walnut shell particles in a walnut particle solution prepared by mixing walnut particles and distilled water according to the weight ratio of 1: 2, placing the walnut shell particle solution in the walnut shell particle storage barrel of the automatic feeding system in the embodiment 1, and placing the biological agent in the biological agent storage barrel of the automatic feeding system in the embodiment 1.
S2 arranging mesh bags transversely in the water pollution area along the longitudinal direction of the water pollution area every 2m, wherein the mesh diameter of each mesh bag is smaller than that of walnut shell particles; the left end and the right end of the mesh bag are respectively fixed on the two transverse sides of the river channel where the water pollution area is located. The mesh bag comprises an upper end part 1 and a lower end part 2, a water-resisting layer is arranged on the inner side of the upper end part 1, a plurality of compartments 3 are arranged on the lower end part 2, each compartment 3 is provided with a channel 4 communicated with the upper end part 1, and the surface of the mesh bag is made to adsorb active carbon through a hot melting mode to form an active carbon layer; before fixing the mesh bag, cleaning solid pollutants in water through a mesh with the same mesh size;
s3 putting in the polluted water area: deposit bucket pipeline discharge gate and walnut shell particulate matter with the biological agent among the automatic dispensing system and deposit the pipeline discharge gate of bucket and fix in upper end 1, open quality of water flow data monitor and master control platform, control automatic dispensing platform and put in automatically, confirm different modes of putting in according to the phosphorus content that detects:
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): 0.1L of biological agent is put in per square meter of water surface area for 12 hours, and then 150g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 24 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): 0.1L of biological agent is put in per square meter of water surface area for 50 hours, and then 100g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 36 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): putting 75ml of biological agent and 100g of obtained walnut shell particles per square meter of water surface area for dephosphorization for 60 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 60ml of phosphorus-accumulating bacteria with the concentration of 0.9g/L and 150g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36 hours;
selecting a fifth putting mode when the phosphorus content in the water is 0.02-0.1 mg/L; 50g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 50 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
S4, when the dosing is stopped at the step S3, the mesh bag with the trapped sediment is removed.
Example 3
The other steps are the same as the example 2, and the difference is that the preparation of the composite biological agent specifically comprises the following steps:
the composite biological agent comprises walnut shell particles and a biological agent,
wherein, the preparation of walnut shell particles comprises the following steps: drying walnut shells, grinding the walnut shells into particles with the diameter of 40mm, heating the walnut shells at 680 ℃ for 10 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 3% of the walnut shells to react for 0.7 hour, washing the walnut shells with distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 1 hour, washing the walnut shells with alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 20 hours to obtain walnut shell particles;
wherein, the preparation of the biological agent comprises the following steps: mixing the stigmata, the chaetoceros and the phosphorus accumulating bacteria to prepare a biological microbial inoculum, wherein the content of the stigmata in the biological microbial inoculum is 0.2g/L, the content of the chaetoceros is 0.3g/L and the content of the phosphorus accumulating bacteria is 1.5 g/L;
example 4
The other steps are the same as the example 2, and the difference is that the preparation of the composite biological agent specifically comprises the following steps:
the composite biological agent comprises walnut shell particles and a biological agent,
wherein, the preparation of walnut shell particles comprises the following steps: drying walnut shells, grinding the walnut shells into particles with the diameter of 25mm, heating the walnut shells at the temperature of 710 ℃ for 7 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 2.5% of the walnut shells to react for 1 hour, washing the walnut shells clean by distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 0.6 hour, washing the walnut shells by using alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 15 hours to obtain walnut shell particles;
wherein, the preparation of the biological agent comprises the following steps: mixing the stigmata, the chaetoceros and the phosphorus accumulating bacteria to prepare a biological microbial inoculum, wherein the content of the stigmata in the biological microbial inoculum is 0.3g/L, the content of the chaetoceros is 0.1g/L and the content of the phosphorus accumulating bacteria is 1 g/L;
example 5
The other steps are the same as embodiment 2, and the different feeding modes are respectively as follows:
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): after 0.2L of biological agent is put in per square meter of water surface area for 18 hours, 200g of walnut shell particles obtained in the step S1 are put in to remove phosphorus for 60 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): 0.15L of biological agent is put in per square meter of water surface area for 60 hours, and then 200g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 50 hours;
when the phosphorus content in the water is 0.3mg/L, selecting a feeding mode (III): 100ml of biological agent and 150g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 75ml of phosphorus-accumulating bacteria with the concentration of 1g/L and 200g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60 hours;
when the phosphorus content in the water is 0.08mg/L, selecting a fifth putting mode; 100g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
Example 6
The other steps are the same as embodiment 2, and the different feeding modes are respectively as follows:
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): putting 0.15L of biological agent into the water surface area per square meter for 24 hours, and then putting 100g of walnut shell particles obtained in the step S1 for removing phosphorus for 40 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): after 0.2L of biological agent is put in per square meter of water surface area for 36 hours, 150g of walnut shell particles obtained in the step S1 are put in to remove phosphorus for 60 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): 50ml of biological agent and 150g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 50ml of phosphorus-accumulating bacteria with the concentration of 1g/L and 200g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36 hours;
when the phosphorus content in the water is 0.08mg/L, selecting a fifth putting mode; 100g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
Example 7
The other steps are the same as embodiment 2, and the different feeding modes are respectively as follows:
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 12-24 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 24-60 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 36-60 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 36-60 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): 50-100 ml of biological agent and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60-100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 50-75 ml of phosphorus-accumulating bacteria with the concentration of 0.8-1.5 g/L and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36-60 hours;
selecting a fifth putting mode when the phosphorus content in the water is 0.02-0.1 mg/L; putting 50-100 g of the obtained walnut shell particles per square meter of water surface area for dephosphorization for 36-60 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
Comparative example 1
The other point is that the biological agent only contains 1g/L of the phosphorus-accumulating bacteria, which is the same as the example 1.
Comparative example 2
The other steps are the same as the example 1, but the biological agent does not contain the dinoflagellate, the content of the chaetoceros is 0.2g/L, and the content of the phosphorus-accumulating bacteria is 1 g/L;
comparative example 3
The other steps are the same as the example 1, but the biological agent does not contain chaetoceros, the content of the stigmata is 0.2g/L, and the content of the phosphorus-accumulating bacteria is 1 g/L;
comparative example 4
The other point is that the walnut granules are replaced by the same weight parts of biological activated carbon with the same particle size as that purchased in the market as example 1.
Experiments show that: under the same water quality, the total phosphorus removal time of the embodiment 2 is obviously shorter than that of the comparative examples 1-4, and the consumption of the biological agent and the consumption of walnut particles are respectively obviously shorter than that of the comparative example 1 by the methods of the embodiment 2 and the comparative example 1. The synergistic effect of Chaetoceros, stigmata and phosphorus-accumulating bacteria is shown, and the phosphorus removal effect is improved. The addition of the walnut particles can promote the dephosphorization effect of the biological agent.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. A method for purifying water by using a composite biological agent is characterized by comprising the following steps:
s1 preparation of the composite biological agent:
s11 preparation of walnut shell particles: drying walnut shells, grinding the walnut shells into particles with the diameter of 10-40 mm, heating the walnut shells at the temperature of 650-710 ℃ for 7-10 hours, cooling the walnut shells to room temperature, adding concentrated sulfuric acid with the weight of 2-3% of the walnut shells to react for 0.5-1 hour, washing the walnut shells cleanly with distilled water, soaking the walnut shells in 0.2mol/L hydrochloric acid solution for 0.5-1 hour, washing the walnut shells with alkaline water until the pH value is 7, and soaking the walnut shells in the distilled water for 10-20 hours to obtain walnut shell particles;
s12 preparation of biological agent: mixing the conidiophora, the chaetoceros and the phosphorus-accumulating bacteria to prepare a biological microbial agent, wherein the content of the conidiophora in the biological microbial agent is 0.1-0.3 g/L, the content of the chaetoceros is 0.1-0.3 g/L and the content of the phosphorus-accumulating bacteria is 0.8-1.5 g/L;
s2 putting in the polluted water area: detecting the phosphorus content in the water, and determining a putting mode;
when the phosphorus content in water is more than 0.4mg/L, selecting a feeding mode (I): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 12-24 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 24-60 hours;
when the phosphorus content in the water is 0.3-0.4 mg/L, selecting a feeding mode (II): after 0.1-0.2L of biological agent is put in per square meter of water surface area for 36-60 hours, 100-200 g of walnut shell particles obtained in the step S1 are put in for dephosphorization for 36-60 hours;
when the phosphorus content in the water is 0.2-0.3 mg/L, selecting a feeding mode (III): 50-100 ml of biological agent and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 60-100 hours;
when the phosphorus content in the water is 0.1-0.2 mg/L, selecting a feeding mode (IV): 50-75 ml of phosphorus-accumulating bacteria with the concentration of 0.8-1.5 g/L and 100-200 g of the obtained walnut shell particles are put in per square meter of water surface area for dephosphorization for 36-60 hours;
selecting a fifth putting mode when the phosphorus content in the water is 0.02-0.1 mg/L; putting 50-100 g of the obtained walnut shell particles per square meter of water surface area for dephosphorization for 36-60 hours;
and stopping feeding when the content of the water is less than 0.02 mg/L.
2. The method for purifying water by using the composite biological agent as claimed in claim 1, which is characterized in that: step S2, adopting an automatic dispensing system, wherein the automatic dispensing system comprises a water quality flow data monitor, a biological agent storage barrel, a walnut shell particle storage barrel, a control valve and a master control platform;
the water quality flow data monitor comprises a detecting head, wherein the detecting head is arranged in the water quality pollution area at intervals of 2 meters, and is communicated with the biological agent storage barrel and the walnut shell particle storage barrel through more than one pipeline; the water quality flow data monitor sends water quality data obtained by monitoring through a probe to the main control platform; the main control platform sends a corresponding instruction of adding the biological agent and the walnut shell particulate matter to the control valve according to the received water quality data;
the control valve is arranged on the pipeline and comprises a valve body and a controller connected with the valve body, and the controller comprises a volume measuring module, an automatic putting module and a wireless communication module; the volume measuring module and the automatic putting module are connected with the main control platform through the wireless communication module;
the volume measuring module is connected with the main control platform through the wireless communication module, and is used for receiving an instruction for measuring the volume of the biological agent in the biological agent storage barrel and the volume of the walnut shell particles in the walnut shell particles storage barrel and feeding back the measured volume to the main control platform;
the automatic releasing module is used for receiving a releasing instruction of the main control platform through the wireless communication module and controlling the opening of the valve body.
3. The method for purifying water quality by using the composite biological agent as claimed in claim 2, wherein a mesh bag is transversely arranged in the water quality pollution area along the longitudinal direction of the water quality pollution area every 2 meters, and the mesh diameter of the mesh bag is smaller than walnut shell particles; the mesh bag comprises an upper end part and a lower end part, a water-resisting layer is arranged on the inner side of the upper end part, a plurality of compartments are arranged on the lower end part, each compartment is provided with a channel communicated with the upper end part, and the surface of the mesh bag is made to adsorb active carbon through a hot melting mode to form an active carbon layer; the pipeline discharge port of the biological agent in the biological phosphorus removal system is arranged in the upper end part through the opening of the mesh bag.
4. The method for purifying water by using the composite biological agent as claimed in claim 3, which is characterized in that: the upper end of the mesh bag is kept on the water level of the water quality pollution area.
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