CN115159785A - Sewage treatment device and sewage treatment method - Google Patents
Sewage treatment device and sewage treatment method Download PDFInfo
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- CN115159785A CN115159785A CN202210882408.0A CN202210882408A CN115159785A CN 115159785 A CN115159785 A CN 115159785A CN 202210882408 A CN202210882408 A CN 202210882408A CN 115159785 A CN115159785 A CN 115159785A
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Images
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/484—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- General Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a sewage treatment device and a sewage treatment method, which relate to the technical field of sewage treatment and solve the problems that the discharged sludge of the existing sewage treatment device can cause secondary pollution to the environment and resource waste; a filter screen is obliquely connected in the filter tank, an impurity receiving groove is formed in the lower end of the filter screen, and a slag outlet is formed in the impurity receiving groove; a rotating shaft is connected in the metal recovery tank, a first motor for driving the rotating shaft to rotate is connected on the rotating shaft, the lower end of the rotating shaft is connected with an electromagnet, and a recovery port is formed in the bottom of the metal recovery tank; the metal recovery pool is connected with a pipeline interface; avoids the secondary pollution to the environment after the metal impurities are mixed in the sludge and discharged, and saves the resources at the same time.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to the technical field of a sewage treatment device and a sewage treatment method.
Background
The sewage treatment technology is to separate pollutants contained in sewage by adopting various methods or convert the pollutants into harmless substances so as to purify the sewage, and the current sewage treatment technology can be divided into three types, namely a physical treatment method, a chemical treatment method and a biological treatment method according to the action principle; the physical treatment method is a precipitation method which mainly utilizes the density difference between the pollutants and water to separate the pollutants from the water by gravity settling effect, and a screening method which utilizes a screening medium to intercept suspended matters in the sewage, wherein the pollutants which are mainly in a suspension state are separated by utilizing the physical action, and the chemical properties of the pollutants are not changed in the treatment process; an air flotation method for removing the tiny granular pollutants with density close to water by using air flotation processing equipment when tiny bubbles formed in sewage float upwards; a reverse osmosis method in which a reverse osmosis membrane is used to trap pollutants; the chemical method for sewage treatment mainly comprises the following steps: a neutralization method, a redox method, an electronic flocculation method and a chemical precipitation method, wherein the neutralization method comprises an acid-base wastewater mutual neutralization method, a medicament neutralization method and a filtration neutralization method; the redox method mainly comprises an ozonization method and a wet oxidation method; the chemical precipitation method is classified into a hydroxide precipitation method, a sulfide precipitation method and a barium salt precipitation method; a biological method for treating waste water is a treatment technique which utilizes the metabolism function of microbes in the waste water to degrade organic matters in the waste water and convert the organic matters into stable inorganic matters, can reduce the concentration of the organic matters expressed by BOD, COD and the like to obtain clean water, can reduce the amount of sludge produced as much as possible, and can remove nutritive salts such as nitrogen, phosphorus and the like.
At present, a sewage treatment device for treating sewage by adopting a physical method has some defects, for example, patent CN201811007525.2 discloses an environmental engineering sewage treatment device, a sludge sedimentation tank is fixedly arranged on the inner surface of the middle part of a sewage treatment device main body, an inner wall cleaning mechanism is fixedly connected with the outer surface of the middle part of the upper end of the sludge sedimentation tank, a fixed pipe is fixedly arranged on the outer surface of the middle part of one side of the sewage treatment device main body, a connecting mechanism is fixedly connected with the outer surface of one side of the fixed pipe, a disinfection tank is fixedly arranged on the outer surface of one side of the sludge sedimentation tank, a bleaching and sterilizing mechanism is fixedly arranged on the inner surface of the upper end of the disinfection tank, a water outlet tank is fixedly arranged on the outer surface of one side of the disinfection tank, and a multi-groove water outlet mechanism is fixedly arranged on the outer surface of one side of the water outlet tank.
Above-mentioned published relevant patent's technical scheme lies in bleaching and filtering the sewage after the preliminary treatment to this improves sewage treatment's effect, sets up the inner wall clearance mechanism in sludge sedimentation tank simultaneously, is that when sludge sedimentation tank carries out the sediment to mud the inner wall can adhere to a large amount of dirt and lead to being difficult for the clearance, clears up the dirt of inner wall through the brush in the inner wall clearance mechanism. The main structure of the device is similar to most of sewage treatment devices adopting physical methods to treat sewage at present, the innovation point of the technical scheme of the patent is mainly that the subsequent problems of sewage treatment are solved, but the pretreatment problem of sewage treatment is neglected, so that the sewage discharged after sewage treatment usually contains some recoverable metal elements and is directly precipitated, and as a result, the metal discharged along with sludge can cause secondary pollution to the environment and waste of resources; simultaneously with filtration setting in a water structure department, though can play the effect to the further purification of sewage, sewage when pretreatment, wherein impurity that contains can make sewage cause the jam of pipeline at flow process usually, causes the influence to sewage treatment's progress, reduces sewage treatment's efficiency.
Disclosure of Invention
The invention aims to solve the problems that the discharged sludge in the conventional sewage treatment device can cause secondary pollution to the environment and cause resource waste, and provides a sewage treatment device and a sewage treatment method for solving the technical problems.
The invention specifically adopts the following technical scheme for realizing the purpose:
a sewage treatment device comprises a primary sedimentation tank, an aeration tank and a secondary sedimentation tank which are connected in sequence, wherein an aeration structure is connected in the aeration tank, the bottoms of the primary sedimentation tank and the secondary sedimentation tank are both connected with sludge discharge pipes, the front end of the primary sedimentation tank is connected with a filter tank, and the front end of the filter tank is connected with a metal recovery tank; a filter screen is obliquely connected in the filter tank, an impurity receiving groove is formed in the lower end of the filter screen through the tank wall of the filter tank, and a slag outlet is formed in the lower end of the impurity receiving groove; a rotating shaft is connected in the metal recovery tank, a first motor for driving the rotating shaft to rotate is connected on the rotating shaft, the lower end of the rotating shaft is connected with an electromagnet, and a recovery port is formed in the bottom of the metal recovery tank; and the upper part of the metal recovery pool is connected with a pipeline connector.
When the sewage treatment device is used for treating industrial sewage, firstly, a sewage discharge pipe is fixedly connected with a pipeline interface on a metal recovery tank of the device, a flocculating agent is configured, and the prepared flocculating agent is put into a throwing box; starting a first motor, opening a gate on a sewage discharge pipe to enable sewage to enter a metal recovery tank, driving a magnetic frame of an inverted umbrella-shaped structure to rotate by the first motor, and adsorbing metal in the sewage through the magnetic frame; the sewage after passing through the metal recovery tank enters a filtering tank, and larger impurities in the sewage are filtered through a filter screen; the sewage after filtration treatment enters a primary sedimentation tank, a flocculating agent is added into the primary sedimentation tank, the flocculating agent and the sewage in the primary sedimentation tank are uniformly stirred by a stirring structure, the stirring is stopped after 2 minutes of stirring, so that the sludge in the primary sedimentation tank is precipitated, then the upper layer liquid is discharged into an aeration tank, and the stirring structure is started again, at the moment, the rotation of the stirring structure in the primary sedimentation tank is used for enabling the discharge of the sludge to be smoother, and the rotation of the stirring structure in the aeration tank is used for enabling the entering gas to be rapidly contacted with the sewage; the sewage treated by the aeration tank enters a secondary sedimentation tank, at the moment, a second batch of sewage enters the primary sedimentation tank, a stirring structure in the primary sedimentation tank enables a flocculating agent to be uniformly mixed with the second batch of sewage, a stirring structure in the secondary sedimentation tank enables the flocculating agent to be uniformly mixed with the first batch of sewage, and stirring is stopped after 2 minutes; the water treated by the secondary sedimentation tank is discharged into a subsequent disinfection process through a drain pipe, the stirring structure is started again after the sewage in the primary sedimentation tank is discharged into the aeration tank, at the moment, the gas and the sewage are uniformly stirred by the stirring structure in the aeration tank, and the sludge is driven to flow by the stirring structures in the primary sedimentation tank and the secondary sedimentation tank.
And (4) carrying out subsequent disinfection and filtration on the sewage settled in the secondary sedimentation tank, and then discharging.
The staff handles the metal of collecting in the metal recovery pond according to actual conditions, for example the interval time of 1 day, the staff can be under the state that equipment was shut down, cut off the power supply to the electro-magnet, electro-magnet after the outage has lost magnetism, adsorb the bottom that the metal on the electro-magnet will fall the metal recovery pond through the gravity of self promptly, the staff opens the end cover of metal recovery pond bottom and can take out the metal of retrieving, after the metal is whole to be taken out, the staff closes the end cover again can.
This application is through connecting metal recovery pond and filtering ponds at the front end of just sinking the pond, can realize the recovery to the metal in the sewage through metal recovery pond, avoid metallic impurity to mix to cause secondary pollution to the environment after discharging in mud, the metal of retrieving simultaneously can also recycle, resources are saved's effect has been realized, connect the filtering ponds at just sinking the pond front end simultaneously, can be with the great impurity of volume in the sewage, for example, the branch, big stone etc. filter, avoid making the jam to the pipeline in subsequent sewage treatment process, the number of times of shutting down the maintenance equipment has been reduced, sewage treatment's efficiency has been improved indirectly.
Further, impurity connects the silo with be provided with logical groove between the filtering ponds, it also is connected with the filter screen to lead to the inslot, impurity connects slag notch department of silo lower extreme to be connected with sealing door.
This application connects through the groove through setting up between silo and the filtering ponds at impurity to locate to connect the filter screen at leading to the groove, can make the filter residue enter into impurity and connect the in-process substituted water stain of silo to get back to the filtering ponds from leading to groove, reduced the sewage volume that the filter residue was taken out, not only reduced the working strength of staff's subsequent handling filter residue, also avoided simultaneously along with a large amount of sewage of filter residue discharge and lead to the problem that causes the pollution to the environment.
Furthermore, the aeration structure is including connecting annular intake pipe in the aeration tank, be provided with a plurality of ventholes in the annular intake pipe, annular intake pipe is connected with the pump of admitting air, the aeration tank top is provided with the exhaust hole.
The aeration is a process of forcibly transferring oxygen in the air into liquid, and aims to obtain enough dissolved oxygen, prevent suspension in the aeration tank from sinking, and strengthen the contact of organic matters with microorganisms and the dissolved oxygen in the aeration tank, so that the microorganisms in the aeration tank can perform oxidative decomposition on the organic matters in the sewage under the condition of sufficient dissolved oxygen.
This application lets in the annular intake pipe with the air through the pump that admits air in, then lets in the aeration tank through the venthole that sets up in the annular intake pipe in, and then realizes increasing the purpose of the dissolved oxygen in the aeration tank, and annular intake pipe is fixed on the pool wall in aeration tank, can not only set up a plurality of ventholes in the annular intake pipe, can not cause the influence to the operation of the stirring structure of connecting in the aeration tank in addition.
Furthermore, flocculant feeding pipes are connected to the primary sedimentation tank and the secondary sedimentation tank, a throwing box is connected to each flocculant feeding pipe, and each flocculant feeding pipe is connected with a control valve; the primary sedimentation tank, the aeration tank and the secondary sedimentation tank are all connected with stirring structures, and transmission structures are connected between the primary sedimentation tank and the aeration tank, and between the secondary sedimentation tank and the aeration tank.
The stirring structure comprises stirring shafts which are respectively connected in the primary sedimentation tank, the aeration tank and the secondary sedimentation tank, stirring blades are connected on the stirring shafts, a second motor is connected on the stirring shafts connected in the aeration tank, and an output shaft of the second motor is connected with the stirring shafts through a coupler; the transmission structure comprises two transmission wheels connected to a stirring shaft in the aeration tank, the stirring shafts connected in the primary sedimentation tank and the secondary sedimentation tank are respectively connected with one transmission wheel, a transmission belt is connected between one of the transmission wheels on the stirring shaft of the aeration tank and the transmission wheel on the stirring shaft of the primary sedimentation tank, and a transmission belt is connected between the other transmission wheel on the stirring shaft of the aeration tank and the transmission wheel on the stirring shaft of the secondary sedimentation tank.
When the flocculant is required to be put into the primary sedimentation tank, the control valve on the flocculant feeding pipe connected with the primary sedimentation tank is opened, and when the flocculant is required to be put into the secondary sedimentation tank, the control valve on the flocculant feeding pipe connected with the secondary sedimentation tank is opened, so that the effect of putting the flocculant is realized.
When the stirring structure in the primary sedimentation tank, the aeration tank and the secondary sedimentation tank operates, the second motor which is connected on the stirring shaft of the aeration tank is started, the power driving stirring shaft provided by the second motor rotates, the driving wheel connected on the stirring shaft can be rotated, and then the power is transmitted to the stirring shaft in the primary sedimentation tank and the secondary sedimentation tank through the driving belt, so that the stirring shaft in the aeration tank, the primary sedimentation tank and the secondary sedimentation tank can be rotated simultaneously, and the stirring effect is realized.
This application is through using transmission structure to connect the primary sedimentation tank, the (mixing) shaft in aeration tank and the secondary sedimentation tank, can not only reduce driving motor's installation quantity, reduce the device's manufacturing cost, also make staff more convenient in operation process simultaneously, and through controlling sewage discharge velocity, can also realize using in the secondary sedimentation tank when using the stirring structure with flocculating agent and sewage stirring mixing to use the stirring structure with the flocculating agent and enter into the sludge stirring mixing of the second batch in the primary sedimentation tank, can so that stirring structure intermittent type nature stops and starts, and can not cause the influence to the sewage treatment flow in primary sedimentation tank and the secondary sedimentation tank, the effect of improving sewage treatment efficiency has been played.
In order to achieve the above object, the present application also provides a sewage treatment method using the above sewage treatment apparatus, comprising the steps of:
step one, connecting a sewage discharge pipe with a pipeline interface on a metal recovery tank;
step two, preparing a flocculating agent, and putting the prepared flocculating agent into a putting box;
starting a first motor, opening a gate on a sewage discharge pipe to enable sewage to enter a metal recovery tank, driving an electromagnet to rotate by the first motor, and adsorbing metal in the sewage by the electromagnet;
step four, the sewage after passing through the metal recovery tank enters a filtering tank, and larger impurities in the sewage are filtered through a filter screen;
step five, the sewage after filtration treatment enters a primary sedimentation tank, a flocculating agent is added into the primary sedimentation tank, the flocculating agent and the sewage in the primary sedimentation tank are uniformly stirred by a stirring structure, the stirring is stopped after 2 minutes of stirring, so that the sludge in the primary sedimentation tank is precipitated, then the upper layer liquid is discharged into an aeration tank, the stirring structure is started again, the rotation of the stirring structure in the primary sedimentation tank is used for enabling the discharge of the sludge to be smoother, and the rotation of the stirring structure in the aeration tank is used for enabling the entering gas to be rapidly contacted with the sewage; the sewage treated by the aeration tank enters a secondary sedimentation tank, at the moment, a second batch of sewage enters the primary sedimentation tank, a stirring structure in the primary sedimentation tank enables a flocculating agent to be uniformly mixed with the second batch of sewage, a stirring structure in the secondary sedimentation tank enables the flocculating agent to be uniformly mixed with the first batch of sewage, and stirring is stopped after 2 minutes; the water treated by the secondary sedimentation tank is discharged into a subsequent disinfection process through a drain pipe, the stirring structure is started again after the sewage in the primary sedimentation tank is discharged into the aeration tank, at the moment, the gas and the sewage are uniformly stirred by the stirring structure in the aeration tank, and the sludge is driven to flow by the stirring structures in the primary sedimentation tank and the secondary sedimentation tank.
Further, the flocculating agent comprises the following raw materials in percentage by mass: 20-30% of konjak polysaccharide, 10-20% of chitosan and 50-70% of acrylamide.
Further, the flocculating agent comprises the following raw materials in percentage by mass: 23 to 28 percent of konjak polysaccharide, 12 to 18 percent of chitosan and 55 to 65 percent of acrylamide.
Further, the flocculating agent comprises the following raw materials in percentage by mass: 25% of konjak polysaccharide, 15% of chitosan and 60% of acrylamide.
Further, the preparation method of the flocculant comprises the following steps:
dissolving konjac polysaccharide in acetic acid to prepare a konjac polysaccharide solution to obtain a solution A;
adding acetic acid into chitosan, heating to 50 ℃ under the stirring of an electric stirrer, and then keeping the temperature of a water bath constant for 1 hour to obtain a solution B;
step three, uniformly mixing the solution A obtained in the step one and the solution B obtained in the step two, then adding ammonium ceric nitrate under the protection of nitrogen, adding acrylamide after reacting for 1 hour, continuing to react for 6 hours, adding ethanol into a product mixed solution after the reaction is finished, adjusting the pH value to be alkalescent by using a sodium hydroxide solution, separating out a copolymer, and carrying out vacuum drying after suction filtration to obtain the composite flocculant.
Acrylamide is added into a mixed solution of a konjac polysaccharide solution and a chitosan solution, the acrylamide not only can modify konjac polysaccharide, but also can modify chitosan, a large amount of amino groups are introduced into the chitosan modified by the acrylamide, and the chitosan has high positive charge density under an acidic condition, so that the electrostatic adsorption effect on negative ions in sewage can be realized, and the molecular weights of the chitosan and the konjac polysaccharide modified by the acrylamide are increased, so that the capacity of removing pollutants is enhanced; after the konjac polysaccharide is contacted with the acrylamide monomer, a primary free radical is formed under the action of ammonium ceric nitrate, then the acrylamide monomer is initiated to become a grafting free radical of the konjac polysaccharide acrylamide monomer, and the free radical and the acrylamide monomer continuously carry out chain growth and chain termination reactions to obtain the graft copolymer of the konjac polysaccharide and the acrylamide monomer. The chitosan and the konjac glucomannan have certain flocculation effect, but the water solubility and the rheological property are poor, so that the konjac glucomannan and the modified chitosan are not suitable to be directly used as flocculating agents, and the modified konjac glucomannan and the modified chitosan obtained after acrylamide modification have the effect of mutual synergistic promotion, so that the adsorption capacity of the compound flocculating agent on pollutants in sewage is enhanced, and the sewage purification effect is improved.
The invention has the following beneficial effects:
(1) The metal recovery tank and the filtering tank are connected to the front end of the primary sedimentation tank, so that metal in sewage can be recovered through the metal recovery tank, secondary pollution to the environment after metal impurities are mixed in sludge and discharged is avoided, the recovered metal can be recycled, the resource saving effect is realized, and meanwhile, the filtering tank connected to the front end of the primary sedimentation tank can filter impurities with large volume in the sewage, such as branches, large stones and the like, so that the pipeline blockage in the subsequent sewage treatment process is avoided, the times of shutdown maintenance equipment are reduced, and the sewage treatment efficiency is indirectly improved;
(2) According to the filter tank, the through groove is formed between the impurity receiving groove and the filter tank, and the filter screen is connected to the through groove, so that water stain substituted in the process that the filter residue enters the impurity receiving groove can return to the filter tank from the through groove, the sewage quantity brought out by the filter residue is reduced, the working strength of workers for subsequent treatment of the filter residue is reduced, and the problem of environmental pollution caused by discharge of a large amount of sewage along with the filter residue is avoided;
(3) According to the aeration tank, air is introduced into the annular air inlet pipe through the air inlet pump, and then is introduced into the aeration tank through the air outlet holes formed in the annular air inlet pipe, so that the purpose of increasing dissolved oxygen in the aeration tank is achieved;
(4) According to the device, the stirring shafts in the primary sedimentation tank, the aeration tank and the secondary sedimentation tank are connected through the transmission structure, so that the installation quantity of driving motors can be reduced, the production cost of the device is reduced, workers can more conveniently operate the device, and the stirring structure is used in the secondary sedimentation tank to stir and mix a flocculating agent and sewage while the stirring structure is used in the primary sedimentation tank to stir and mix the flocculating agent and the second batch of sludge entering the primary sedimentation tank, so that the stirring structure can be intermittently stopped and started, the influence on sewage treatment in the primary sedimentation tank and the secondary sedimentation tank is avoided, and the effect of improving the sewage treatment efficiency is achieved;
(5) The flocculant adopts a composite flocculant, and modified konjac glucomannan and modified chitosan obtained by modifying acrylamide form a mutual synergistic promotion effect, so that the adsorption capacity of the composite flocculant on pollutants in sewage is enhanced, and the sewage purification effect is improved;
(6) This application is sinking pond, aeration tank and two stirring structures of sinking the pond internal connection at first, can also promote mud in the sewage and be strikeed by rivers in the processing procedure, can not gather on the pond inner wall to it carries out abluent flow to the pond inner wall to have reduced specially.
Drawings
FIG. 1 is a schematic view showing a sewage treatment apparatus according to the present invention;
FIG. 2 is a top view of an aeration structure according to the present invention;
fig. 3 is an enlarged view of a in fig. 1.
Reference numerals are as follows: 01-end cover, 02-recovery port, 03-metal recovery tank, 04-electromagnet, 05-pipeline interface, 06-rotating shaft, 07-first motor, 08-filter tank, 09-filter screen, 10-second motor, 11-feeding box, 12-flocculant feeding pipe, 13-transmission belt, 14-transmission wheel, 15-secondary sedimentation tank, 16-stirring shaft, 17-stirring blade, 18-sludge discharge pipe, 19-annular air inlet pipe, 20-air outlet hole, 21-aeration tank, 22-air pump, 23-primary sedimentation tank, 24-sealing door, 25-impurity receiving tank and 26-through groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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.
Example 1
Referring to fig. 1 to 3, the embodiment provides a sewage treatment apparatus, which includes a primary sedimentation tank 23, an aeration tank 21 and a secondary sedimentation tank 15, which are connected in sequence, wherein the aeration tank 21 is connected with an aeration structure, the bottoms of the primary sedimentation tank 23 and the secondary sedimentation tank 15 are both connected with a sludge discharge pipe 18, the front end of the primary sedimentation tank 23 is connected with a filtering tank 08, and the front end of the filtering tank 08 is connected with a metal recovery tank 03; a filter screen 09 is obliquely connected in the filter tank 08, an impurity receiving groove 25 is formed in the lower end of the filter screen 09 and penetrates through the tank wall of the filter tank 08, and a slag outlet is formed in the bottom of the impurity receiving groove 25; a rotating shaft 06 is connected in the metal recovery tank 03, a first motor 07 for driving the rotating shaft 06 to rotate is connected on the rotating shaft 06, an electromagnet 04 is connected at the lower end of the rotating shaft 06, and a recovery port 02 is arranged at the bottom of the metal recovery tank 03; the upper part of the metal recovery tank 03 is connected with a pipeline joint 05.
When the sewage treatment device is used for treating industrial sewage, firstly, a sewage discharge pipe is fixedly connected with a pipeline interface 05 on a metal recovery tank 03 of the device, a flocculating agent is prepared, and the prepared flocculating agent is put into a throwing box 11; starting a first motor 07, opening a gate on a sewage discharge pipe to enable sewage to enter a metal recovery tank 03, driving a magnetic frame of an inverted umbrella-shaped structure to rotate by the first motor 07, and adsorbing metal in the sewage through the magnetic frame; the sewage after passing through the metal recovery tank 03 enters a filtering tank 08, and larger impurities in the sewage are filtered through a filter screen 09; the sewage after filtration treatment enters a primary sedimentation tank 23, a flocculating agent is added into the primary sedimentation tank 23, the flocculating agent and the sewage in the primary sedimentation tank 23 are uniformly stirred by a stirring structure, the stirring is stopped after the stirring is carried out for 1 to 2 minutes, the sludge in the primary sedimentation tank 23 is settled, then the upper liquid is discharged into an aeration tank 21, and the stirring structure is started again, wherein the rotation of the stirring structure in the primary sedimentation tank is to ensure that the sludge is discharged more smoothly, and the rotation of the stirring structure in the aeration tank 21 is to ensure that the entering gas is in rapid contact with the sewage; the sewage treated by the aeration tank 21 enters a secondary sedimentation tank 15, at the moment, a second batch of sewage enters the dust removal tank, a stirring structure in the dust removal tank enables a flocculating agent to be uniformly mixed with the second batch of sewage, a stirring structure in the secondary sedimentation tank 15 enables the flocculating agent to be uniformly mixed with the first batch of sewage, and stirring is stopped after 1-2 minutes; the water treated by the secondary sedimentation tank 15 is discharged into a subsequent disinfection process through a drain pipe, the stirring structure is started again after the sewage in the dedusting tank is discharged into the aeration tank 21, at the moment, the gas and the sewage are stirred and uniformly mixed by the stirring structure in the aeration tank 21, and the sludge is driven to flow by the stirring structures in the primary sedimentation tank 23 and the secondary sedimentation tank 15.
And (4) disinfecting and filtering the sewage settled in the secondary sedimentation tank, and then discharging.
The metal of collecting in the metal recovery pond 03 is handled according to actual conditions to the staff, for example the interval time of 1 day, the staff can be under the state that equipment was shut down, cut off the power supply to electro-magnet 04, electro-magnet 04 after the outage has lost magnetism, the metal that adsorbs on electro-magnet 04 will fall the bottom of metal recovery pond 03 through the gravity of self promptly, the staff opens the end cover 01 of metal recovery pond 03 bottom and can take out the metal of recovery, after the metal is whole to be taken out, the staff closes end cover 01 again can.
This application is through connecting metal recovery pond 03 and filtering ponds 08 at the front end of just sinking pond 23, can realize the recovery to the metal in the sewage through metal recovery pond 03, avoid metallic impurity to mix and cause secondary pollution to the environment after discharging in mud, the metal of retrieving simultaneously can also recycle, resources are saved's effect has been realized, connect simultaneously at the filtering ponds 08 of just sinking pond 23 front end, can be with the great impurity of volume in the sewage, for example, the branch, big stone etc. filters, avoid causing the jam to the pipeline in subsequent sewage treatment process, the number of times of shutting down maintenance equipment has been reduced, sewage treatment's efficiency has been improved indirectly.
Example 2
Referring to fig. 1 to 3, according to embodiment 1, a through groove 26 is provided between the impurity receiving tank 25 and the filtering tank 08, a filter screen is also connected to the through groove 26, and a sealing door 24 is connected to a slag outlet of the impurity receiving tank 25.
This application connects through groove 26 through setting up between silo 25 and filtering ponds 08 at impurity to connecting filter screen 09 in leading to groove 26, can make the filter residue enter into impurity and connect in-process substituted water stain from leading to groove 26 and get back to filtering ponds 08 in, reduced the sewage volume that the filter residue was taken out, the working strength of staff's follow-up processing filter residue has not only been reduced, also avoided simultaneously along with a large amount of sewage of filter residue discharge and lead to causing the problem of pollution to the environment.
Example 3
Referring to fig. 1 to 3, based on embodiment 1, the aeration structure of this embodiment includes an annular air inlet pipe 19 connected to the inside of the aeration tank 21, the annular air inlet pipe 19 is provided with a plurality of air outlet holes 20, the annular air inlet pipe 19 is connected to an air inlet pump 22, and the top of the aeration tank 21 is provided with an air outlet hole.
The aeration means a process of forcibly transferring oxygen in the air into the liquid, and is intended to obtain sufficient dissolved oxygen, and also to prevent the suspension in the aeration tank 21 from sinking, and to enhance the contact of the organic matters in the aeration tank 21 with the microorganisms and the dissolved oxygen, thereby ensuring that the microorganisms in the aeration tank 21 perform an oxidative decomposition action on the organic matters in the sewage under the condition that sufficient dissolved oxygen is present.
This application lets in the air in annular intake pipe 19 through air intake pump 22, then let in aeration tank 21 through the venthole 20 that sets up on the annular intake pipe 19 in, and then realize increasing the purpose of the dissolved oxygen in the aeration tank 21, annular intake pipe 19 is fixed on aeration tank 21's pool wall, can not only set up a plurality of ventholes 20 on annular intake pipe 19, and the operation that also can not cause the influence to the stirring structure of aeration tank 21 internal connection.
Example 4
Referring to fig. 1 to 3, based on example 1, a primary sedimentation tank 23 and a secondary sedimentation tank 15 of this example are both connected with a flocculant feeding pipe 12, a throwing box 11 is connected with the flocculant feeding pipe 12, and each flocculant feeding pipe 12 is connected with a control valve; the primary sedimentation tank 23, the aeration tank 21 and the secondary sedimentation tank 15 are all connected with stirring structures, and transmission structures are connected between the primary sedimentation tank 23 and the aeration tank 21 and between the secondary sedimentation tank 15 and the aeration tank 21.
The stirring structure comprises a stirring shaft 16 which is respectively connected in a primary sedimentation tank 23, an aeration tank 21 and a secondary sedimentation tank 15, wherein the stirring shaft 16 is connected with a stirring blade 17, the stirring shaft 16 connected in the aeration tank 21 is connected with a second motor 10, and an output shaft of the second motor 10 is connected with the stirring shaft 16 through a coupler; the transmission structure comprises two transmission wheels connected to a stirring shaft 16 in an aeration tank 21, the upper ends of the stirring shafts 16 connected in a primary sedimentation tank 23 and a secondary sedimentation tank 15 are also respectively connected with a transmission wheel 14, a transmission belt 13 is connected between one of the transmission wheels on the stirring shaft 16 of the aeration tank 21 and the transmission wheel on the stirring shaft 16 of the primary sedimentation tank 23, and a transmission belt 13 is connected between the other transmission wheel on the stirring shaft 16 of the aeration tank 21 and the transmission wheel 14 on the stirring shaft 16 of the secondary sedimentation tank 15.
When the flocculant is required to be put into the primary sedimentation tank 23, the control valve on the flocculant feeding pipe 12 connected with the primary sedimentation tank 23 is opened, and when the flocculant is required to be put into the secondary sedimentation tank 15, the control valve on the flocculant feeding pipe 12 connected with the secondary sedimentation tank 15 is opened, so that the effect of putting the flocculant is realized.
When the stirring structure in the primary sedimentation tank 23, the aeration tank 21 and the secondary sedimentation tank 15 is operated, the second motor 10 connected to the stirring shaft 16 of the aeration tank 21 is started, the stirring shaft 16 is driven to rotate by the power provided by the second motor 10, so that the driving wheel connected to the stirring shaft 16 can rotate, and then the power is transmitted to the stirring shaft 16 in the primary sedimentation tank 23 and the secondary sedimentation tank 15 through the driving belt 13, so that the stirring shafts 16 in the aeration tank 21, the primary sedimentation tank 23 and the secondary sedimentation tank 15 can rotate simultaneously, and the stirring effect is realized.
This application is through using transmission structure to connect just heavy pond 23, the (mixing) shaft 16 in aeration tank 21 and the two heavy ponds 15, can not only reduce driving motor's installation quantity, reduce the device's manufacturing cost, also make staff more convenient in operation process simultaneously, and through control sewage discharge speed, can also realize using stirring structure in the two heavy ponds 15 with the flocculating agent with sewage stirring mixing in just heavy pond 23 in use stirring structure with the flocculating agent with enter into the mud stirring mixing of the second batch in just heavy pond 23, can so that stirring structure intermittent type nature stops and starts, and can not cause the influence to just heavy pond 23 and the sewage treatment flow in the two heavy ponds 15, the effect of improving sewage treatment efficiency has been played.
Example 5
Referring to fig. 1 to 3, the embodiment provides a sewage treatment method including the steps of:
step one, connecting a sewage discharge pipe with a pipeline interface 05 on a metal recovery pool 03;
step two, preparing a flocculating agent, and putting the prepared flocculating agent solution into a putting box 11;
the flocculant comprises the following raw materials in percentage by mass: 20% of konjak polysaccharide, 10% of chitosan and 70% of acrylamide.
The preparation method of the flocculant comprises the following steps:
(1) Dissolving konjac polysaccharide in acetic acid to prepare a konjac polysaccharide solution to obtain a solution A;
(2) Adding acetic acid into chitosan, heating to 50 ℃ under the stirring of an electric stirrer, and then keeping the temperature of a water bath constant for 1 hour to obtain a solution B;
(3) Uniformly mixing the solution A obtained in the step one and the solution B obtained in the step two, then adding ammonium ceric nitrate under the protection of nitrogen, reacting for 1 hour, adding acrylamide, continuing to react for 6 hours, after the reaction is finished, adding ethanol into a product mixed solution, adjusting the pH value to be alkalescent by using a sodium hydroxide solution, separating out a copolymer, and performing vacuum drying after suction filtration to obtain a composite flocculant;
(4) The prepared composite flocculant is prepared into a dilute solution with the mass fraction of 0.2%.
Step three, starting a first motor 07, opening a gate on a sewage discharge pipe to enable sewage to enter a metal recovery tank 03, driving an electromagnet 04 to rotate by the first motor 07, and adsorbing metal in the sewage through the electromagnet 04;
step four, the sewage after passing through the metal recovery tank 03 enters a filtering tank 08, and larger impurities in the sewage are filtered through a filter screen 09;
step five, sewage after filtration treatment enters a primary sedimentation tank 23, a flocculating agent is added into the primary sedimentation tank 23, the flocculating agent and the sewage in the primary sedimentation tank 23 are uniformly stirred through a stirring structure, stirring is stopped after 2 minutes, sludge in the primary sedimentation tank 23 is precipitated, then upper-layer liquid is discharged into an aeration tank 21, and the stirring structure is started again, wherein the rotation of the stirring structure in the primary sedimentation tank is used for enabling the sludge to be discharged more smoothly, and the rotation of the stirring structure in the aeration tank 21 is used for enabling the entering gas to be in contact with the sewage rapidly; the sewage treated by the aeration tank 21 enters a secondary sedimentation tank 15, at the moment, a second batch of sewage enters a primary sedimentation tank 23, a stirring structure in the primary sedimentation tank 23 enables a flocculating agent to be uniformly mixed with the second batch of sewage, a stirring structure in the secondary sedimentation tank 15 enables the flocculating agent to be uniformly mixed with the first batch of sewage, and stirring is stopped after 2 minutes; and the water treated by the secondary sedimentation tank 15 is discharged into a subsequent disinfection process through a water discharge pipe, the stirring structure is started again after the sewage in the primary sedimentation tank 23 is discharged into the aeration tank 21, at the moment, the gas and the sewage are uniformly stirred by the stirring structure in the aeration tank 21, and the sludge is driven to flow by the stirring structures in the primary sedimentation tank 23 and the secondary sedimentation tank 15.
Example 6
The difference from the embodiment 5 is that the flocculating agent of the embodiment comprises the following components in percentage by mass: 30% of konjac polysaccharide, 20% of chitosan and 50% of acrylamide.
Example 7
The difference from the embodiment 5 is that the flocculating agent of the embodiment comprises the following components in percentage by mass: 28% of konjak polysaccharide, 12% of chitosan and 60% of acrylamide.
Example 8
The difference from the embodiment 5 is that the flocculating agent of the embodiment comprises the following components in percentage by mass: 23% of konjak polysaccharide, 12% of chitosan and 65% of acrylamide.
Example 9
The difference from the embodiment 5 is that the flocculating agent of the embodiment comprises the following components in percentage by mass: the flocculant comprises the following raw materials in parts by weight: 25% of konjak polysaccharide, 15% of chitosan and 60% of acrylamide.
Comparative example 1
The difference from example 5 is that the flocculant of this example is a single konjac polysaccharide.
Comparative example 2
The difference from example 5 is that the flocculant of this example is a single chitosan.
Comparative example 3
The difference from example 5 is that the flocculant of this example contains konjac polysaccharide and acrylamide.
Comparative example 4
The difference from example 5 is that the flocculant of this example has chitosan and acrylamide as components.
Experimental detection of
9 groups of biochemical effluent of a certain urban sewage treatment plant in Hubei are taken, wherein each group is 200ml, COD of the effluent is determined to be 180mg/L, and turbidity is 105NTU, the flocculating agents prepared by the methods of examples 5 to 9 and comparative examples 1 to 4 are respectively added into 9 groups of sewage samples, the mixture is rapidly stirred for 2 minutes and then is kept stand, supernate after the standing is taken for detection, the detected COD and turbidity data are recorded, and the specific results are shown in the following table.
According to the detection results, the flocculant obtained by the preparation method of the flocculant defined in the application is higher than the comparative example in both COD removal rate and turbidity removal rate, so that the effect of sewage treatment can be improved by the flocculant prepared by the method of the application, and meanwhile, the effect of mutual synergistic promotion among all the components in the flocculant in the application is achieved by comparison of the comparative example.
Claims (10)
1. A sewage treatment device comprises a primary sedimentation tank (23), an aeration tank (21) and a secondary sedimentation tank (15) which are sequentially connected, wherein the aeration tank (21) is internally connected with an aeration structure, and the bottoms of the primary sedimentation tank (23) and the secondary sedimentation tank (15) are both connected with a sludge discharge pipe (18), and the sewage treatment device is characterized in that the front end of the primary sedimentation tank (23) is connected with a filter tank (08), and the front end of the filter tank (08) is connected with a metal recovery tank (03); a filter screen (09) is obliquely connected in the filter tank (08), an impurity receiving groove (25) is formed in the lower end of the filter screen (09) through the wall of the filter tank (08), and a slag outlet is formed in the bottom of the impurity receiving groove (25); a rotating shaft (06) is connected in the metal recovery tank (03), a first motor (07) for driving the rotating shaft (06) to rotate is connected to the rotating shaft (06), an electromagnet (04) is connected to the lower end of the rotating shaft (06), and a recovery port (02) is formed in the bottom of the metal recovery tank (03); the upper part of the metal recovery tank (03) is connected with a pipeline connector (05).
2. The sewage treatment device according to claim 1, wherein a through groove (26) is arranged between the impurity receiving groove (25) and the filtering tank (08), a filter screen is connected in the through groove (26), and a sealing door (24) is connected at a slag outlet at the lower end of the impurity receiving groove (25).
3. The sewage treatment device according to claim 1, wherein the aeration structure comprises an annular air inlet pipe (19) connected in the aeration tank (21), a plurality of air outlet holes (20) are arranged on the annular air inlet pipe (19), an air inlet pump (22) is connected to the annular air inlet pipe (19), and an air outlet hole is arranged at the top of the aeration tank (21).
4. The sewage treatment device according to claim 1, wherein a flocculant feeding pipe (12) is connected to each of the primary sedimentation tank (23) and the secondary sedimentation tank (15), a throwing tank (11) is connected to each flocculant feeding pipe (12), and a control valve is connected to each flocculant feeding pipe (12); the primary sedimentation tank (23), the aeration tank (21) and the secondary sedimentation tank (15) are all connected with stirring structures, and transmission structures are connected between the primary sedimentation tank (23) and the aeration tank (21) and between the secondary sedimentation tank (15) and the aeration tank (21).
5. The sewage treatment device according to claim 4, wherein the stirring structure comprises a stirring shaft (16) respectively connected to the primary sedimentation tank (23), the aeration tank (21) and the secondary sedimentation tank (15), the stirring shaft (16) is connected with a stirring blade (17), the stirring shaft (16) connected in the aeration tank (21) is connected with a second motor (10), and an output shaft of the second motor (10) is connected with the stirring shaft (16) through a coupling; the transmission structure comprises two transmission wheels connected to a stirring shaft (16) in the aeration tank (21), the upper ends of the stirring shaft (16) connected in the primary sedimentation tank (23) and the secondary sedimentation tank (15) are also respectively connected with a transmission wheel (14), a transmission belt (13) is connected between one of the transmission wheels on the stirring shaft (16) of the aeration tank (21) and the transmission wheel on the stirring shaft (16) of the primary sedimentation tank (23), and a transmission belt (13) is connected between the other transmission wheel on the stirring shaft (16) of the aeration tank (21) and the transmission wheel (14) on the stirring shaft (16) of the secondary sedimentation tank (15).
6. A sewage treatment method using the sewage treatment apparatus according to any one of claims 1 to 5, comprising the steps of:
step one, connecting a sewage discharge pipe with a pipeline interface (05) on a metal recovery tank (03);
step two, preparing a flocculating agent, and putting the prepared flocculating agent into a throwing box (11);
step three, starting a first motor (07), opening a gate on a sewage discharge pipe to enable sewage to enter a metal recovery tank (03), driving an electromagnet (04) to rotate by the first motor (07), and adsorbing metal in the sewage through the electromagnet (04);
step four, the sewage after passing through the metal recovery tank (03) enters a filtering tank (08), and larger impurities in the sewage are filtered through a filter screen (09);
step five, sewage after filtration treatment enters a primary sedimentation tank (23), a flocculating agent is put into the primary sedimentation tank (23), the flocculating agent and the sewage in the primary sedimentation tank (23) are uniformly stirred through a stirring structure, stirring is stopped after 2 minutes, so that sludge in the primary sedimentation tank (23) is precipitated, then upper-layer liquid is discharged into an aeration tank (21), and the stirring structure is started again, wherein the rotation of the stirring structure in the primary sedimentation tank (23) is to ensure that the discharge of the sludge is smoother, and the rotation of the stirring structure in the aeration tank (21) is to ensure that the entering gas is rapidly contacted with the sewage; the sewage treated by the aeration tank (21) enters a secondary sedimentation tank (15), at the moment, a second batch of sewage enters the primary sedimentation tank (23), a stirring structure in the primary sedimentation tank (23) enables a flocculant to be uniformly mixed with the second batch of sewage, a stirring structure in the secondary sedimentation tank (15) enables the flocculant to be uniformly mixed with the first batch of sewage, and stirring is stopped after 2 minutes; the water treated by the secondary sedimentation tank (15) is discharged into a subsequent disinfection process through a drain pipe, the stirring structure is started again after the sewage in the primary sedimentation tank (23) is discharged into the aeration tank (21), at the moment, the gas and the sewage are uniformly stirred by the stirring structure in the aeration tank (21), and the sludge is driven to flow by the stirring structures in the primary sedimentation tank (23) and the secondary sedimentation tank (15).
7. The sewage treatment method according to claim 6, wherein the flocculating agent comprises the following components in percentage by mass: 20 to 30 percent of konjak polysaccharide, 10 to 20 percent of chitosan and 50 to 70 percent of acrylamide.
8. The sewage treatment method according to claim 7, wherein the flocculating agent comprises the following components in percentage by mass: 23 to 28 percent of konjak polysaccharide, 12 to 18 percent of chitosan and 55 to 65 percent of acrylamide.
9. The sewage treatment method according to claim 7, wherein the flocculating agent comprises the following components in percentage by mass: 25% of konjak polysaccharide, 15% of chitosan and 60% of acrylamide.
10. The wastewater treatment method according to any one of claims 7 to 9, wherein the flocculant is prepared by:
dissolving konjac polysaccharide in acetic acid to prepare a konjac polysaccharide solution to obtain a solution A;
step two, adding acetic acid into chitosan, heating to 50 ℃ under the stirring of an electric stirrer, and then keeping the temperature of a water bath for 1 hour to obtain a solution B;
step three, uniformly mixing the solution A obtained in the step one and the solution B obtained in the step two, then adding ammonium ceric nitrate under the protection of nitrogen, reacting for 1 hour, adding acrylamide, continuing to react for 6 hours, after the reaction is finished, adding ethanol into the product mixed solution, adjusting the pH value to be alkalescent by using a sodium hydroxide solution, separating out a copolymer, and performing vacuum drying after suction filtration to obtain the composite flocculant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210882408.0A CN115159785A (en) | 2022-07-25 | 2022-07-25 | Sewage treatment device and sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115991548A (en) * | 2023-02-15 | 2023-04-21 | 山东文通环保科技有限公司 | Sewage treatment equipment and method for microbial fermentation |
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| CN108046365A (en) * | 2017-12-28 | 2018-05-18 | 成都三木行新能源科技有限公司 | A kind of efficient air-floating filter device |
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| CN115991548A (en) * | 2023-02-15 | 2023-04-21 | 山东文通环保科技有限公司 | Sewage treatment equipment and method for microbial fermentation |
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