CN113024040A - Green photoelectric wastewater treatment device and method using sunlight as driving force - Google Patents

Green photoelectric wastewater treatment device and method using sunlight as driving force Download PDF

Info

Publication number
CN113024040A
CN113024040A CN202110294669.6A CN202110294669A CN113024040A CN 113024040 A CN113024040 A CN 113024040A CN 202110294669 A CN202110294669 A CN 202110294669A CN 113024040 A CN113024040 A CN 113024040A
Authority
CN
China
Prior art keywords
biochemical
wastewater
anode
arc
sunlight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110294669.6A
Other languages
Chinese (zh)
Inventor
丁晶
崔冰心
关淑妍
赵庆良
高庆伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Original Assignee
Harbin Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN202110294669.6A priority Critical patent/CN113024040A/en
Publication of CN113024040A publication Critical patent/CN113024040A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • 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
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4616—Power supply
    • C02F2201/46165—Special power supply, e.g. solar energy or batteries
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y02A20/208—Off-grid powered water treatment
    • Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

A green photoelectric waste water treatment device and method using sunlight as driving force relate to a waste water treatment device and method. The method aims to solve the technical problems of large electricity consumption and low current utilization rate of the existing sewage electrochemical treatment method. The device consists of a photovoltaic and electric storage module, a pretreatment module and an illumination cylindrical electrochemical reactor module; the photovoltaic and power storage module supplies power to the system; the pretreatment module consists of a composite pretreatment tank, a biochemical tank and a centrifugal pump; the illumination cylindrical electrochemical reactor module consists of a rotary paraboloid condenser and a reactor, wherein an arc anode and a rod-shaped cathode are arranged in the reactor. The treatment method comprises the following steps: the wastewater is treated by a composite pretreatment tank and a biochemical tank and then is input into an illumination cylindrical electrochemical reactor, and the wastewater treatment is completed after the electrolysis under the illumination condition. The removal rate of organic matters and ammonia nitrogen in the wastewater reaches 85-95 percent and 85-100 percent. Can be used in the field of distributed sewage treatment in areas rich in solar energy.

Description

Green photoelectric wastewater treatment device and method using sunlight as driving force
Technical Field
The invention relates to a wastewater treatment device and a method.
Background
With the rapid development of economic technology and the increasing demand of people for good life, the problem of environmental pollution caused by waste water is more and more emphasized, the water pollution treatment industry is rapidly developed, the covered area is deeper, and the water treatment index is stricter. However, for vast places or regions which are not brought into the urban sewage treatment pipe network, how to simply and effectively treat the wastewater according to local conditions still remains a great problem which needs to be solved urgently. Wherein small-size integrated sewage treatment device is the first choice scheme of solving this difficult problem because of having strong adaptability, area is little, compact structure, simple to operate, integrate advantages such as degree of automation height, operation maintenance are simple.
The process methods currently used by small-sized integrated sewage treatment equipment can be roughly divided into three types: (1) the conventional biochemical treatment method is to effectively combine the functions of traditional sewage pretreatment, biochemical treatment, sludge treatment and the like into the same treatment equipment, and the common process type is A2O, SBR, the method has low pollutant treatment efficiency, is greatly influenced by factors such as waste water and external conditions, and has unstable effluent quality. (2) Membrane treatment, i.e., the filtration of ultrafiltration (microfiltration) or reverse osmosis membranes, etc., to separate pollutants from water with high efficiency. The process has the advantages of high pollutant removing efficiency and small occupied area. However, the process has high construction cost and high operation requirement on workers, and has the problems of membrane pollution and difficulty in treating concentrated solution, so that the further development of the process is limited in some aspects. (3) The electrochemical treatment method is to degrade organic matters through the oxidation reduction of electrocatalysis, and compared with the two methods, the method has the advantages of simple and convenient operation, strong controllability, compact structure, high removal efficiency and no generation of twoSecondary pollution and the like, and is more suitable for being applied in integrated sewage treatment equipment. However, the conventional electrochemical treatment requires matching of municipal power grids, and has the problems of high electric quantity consumption, low current utilization rate and the like.
Disclosure of Invention
The invention provides a green photoelectric wastewater treatment device and method taking sunlight as a driving force, aiming at solving the technical problems of large electricity consumption and low current utilization rate of the existing sewage electrochemical treatment method.
The invention relates to a green photoelectric wastewater treatment device taking sunlight as a driving force, which consists of a photovoltaic and electricity storage module, a pretreatment module and an illumination cylindrical electrochemical reactor module;
the photovoltaic and electric storage module consists of a solar photovoltaic panel battery 1, a storage battery 2, an electric control cabinet and a microcomputer automatic control system 3; the solar photovoltaic panel battery 1 directly supplies power for output in sunny days and stores electricity for the storage battery 2, the storage battery 2 supplies power for output in night or cloudy days, and the electric control cabinet and the microcomputer automatic control system 3 adjust the power supply mode;
the pretreatment module consists of a composite pretreatment tank 4, a biochemical tank 5 and a centrifugal pump 6, wherein the composite pretreatment tank 4 consists of a grating filtering area 4-1 and an inclined plate sedimentation area 4-2; an aeration pump 5-1 is arranged in the biochemical tank 5;
the lower part of the side wall of the grating filtering area 4-1 is provided with a water inlet 4-1-1, and the upper part of the side wall of the inclined plate sedimentation area 4-2 is provided with a water outlet 4-2-1;
an aeration pump 5-1 is arranged in the biochemical tank 5; the upper part of one side wall of the biochemical pool 5 is provided with a biochemical inlet 5-2, and the lower part of the side wall is provided with a biochemical outlet 5-3;
the illumination cylindrical electrochemical reactor module consists of a rotary paraboloid condenser 7 and a cylindrical reactor 8, the cylindrical reactor 8 is transversely arranged, and the cylindrical reactor 8 consists of a cylinder 8-1, an arc anode 8-2, a rod-shaped cathode 8-3 and a water flow dispersion filter screen 8-4;
an arc anode 8-2 and a rod-shaped cathode 8-3 are arranged in the cylinder 8-1, the arc anode 8-2 is close to the top of the cylinder 8-1, the rod-shaped cathode 8-3 is close to the bottom of the cylinder 8-1, a water flow dispersing filter screen 8-4 is transversely arranged above the rod-shaped cathode 8-3, a water inlet 8-1-1 is arranged at the bottom of one side of the cylinder 8-1, and a water outlet 8-1-2 is arranged at the top of the opposite side; the barrel body of the barrel body 8-1 is made of a light-transmitting material or a transparent light window 8-1-3 is arranged on the barrel body;
the rotary paraboloidal condenser 7 is arranged at two sides of the outside of the cylindrical reactor 8, and the rotary paraboloidal condenser 7 focuses sunlight to the arc-shaped anode 8-2 through the transparent light window;
a water outlet 4-2-1 of the composite pretreatment tank 4 is connected with a biochemical inlet 5-2 of the biochemical tank 5; a biochemical outlet 5-3 of the biochemical pool 5 is connected with a water inlet 8-1-1 of the cylinder body 8-1 through a centrifugal pump 6;
the photo-electricity generation and storage module is connected with the aeration pump and the centrifugal pump 6 of the biochemical pool 2-2 through a circuit to supply electricity to the biochemical pool; meanwhile, the positive end of the photo-generation and electricity storage module is connected with the arc anode 8-2, and the negative end is connected with the rod-shaped cathode 8-3;
furthermore, the transparent light window on the cylinder 8-1 is made of organic glass, glass or quartz;
furthermore, the distance between the arc anode 8-2 and the inner wall of the cylinder 8-1 is equal to the distance between the rod-shaped cathode 8-3 and the wall of the reactor cylinder 3-2-1;
furthermore, 2-4 revolution paraboloidal condenser lenses 7 are respectively arranged at two sides of the cylindrical reactor 8, and 2 condenser lenses are arranged at each side;
furthermore, the arc anode 8-2 is an arc titanium-based ruthenium iridium oxide electrode (DSA), and the oxidation mineralization degree of the wastewater can be improved by using the electrode.
Furthermore, the rod-shaped cathode 8-3 is a ruthenium iridium coated titanium-based metal oxide electrode.
Furthermore, the aperture of the water flow dispersing filter screen 8-4 is 18-23 mm.
The method for treating photoelectrochemical wastewater by using the green photoelectricity wastewater treatment device taking the ether sunlight as the driving force comprises the following steps:
firstly, wastewater to be treated enters a grating filtering area 4-1 of a composite pretreatment tank 4 through a water inlet 4-1-1 to be filtered, large particle impurities are removed, then the wastewater enters an inclined plate sedimentation area 4-2 to be precipitated, impurities which are insoluble in water and comprise gravel are removed, then the wastewater is discharged through a water outlet 4-2-1 and enters a biochemical tank through a biochemical inlet 5-2 to be subjected to biochemical treatment, and partial organic matters and ammonia nitrogen in the wastewater are removed;
secondly, injecting the wastewater treated by the biochemical pool 4 into a cylindrical reactor 8 by using a centrifugal pump 6, enabling the wastewater to firstly flow through a cathode region and then enter an anode region through a water flow dispersing filter screen 8-4, enabling the voltage between an arc-shaped anode 8-2 and a rod-shaped cathode 8-3 to be 3-10V, and enabling the current density of the arc-shaped anode 8-2 to be 5-50 mA/cm2Meanwhile, the rotating paraboloid condenser 7 focuses the sunlight to the arc anode 8-2 through the transparent light window 8-1-3, the hydraulic retention time is controlled to be 0.5 h-3 h, and finally the sunlight flows out from the water outlet 8-1-2, so that the wastewater treatment is completed.
In the cylindrical reactor 8 of the present invention, Cl is present in the wastewater-、SO4 2-In the presence of electrolyte ions, organic matters in the wastewater are removed through an electrochemical oxidation process of the anode, wherein active free radicals generated by electrocatalysis of the anode play a main role, and the specific reaction is as follows:
H2O→·OH+H++e- (1)
2Cl-→Cl2+2e- (2)
Cl2+H2O→HOCl+H++Cl- (3)
SO4 2-→(SO4 -)·+e- (4)
SO4 2-+·OH→(SO4 -)·+OH- (5)
when electrochemical wastewater treatment is carried out, sunlight is focused into water through the rotary paraboloid condenser, and the degradation efficiency of pollutants in the wastewater can be further improved by the mode. The reason is that the sunlight irradiates in water, so that the generation capacity of free radicals is improved, and the self-quenching process between the free radicals is reversed, so that the number of active free radicals in the system is increased, and the oxidation activity of the system is enhanced. The specific reaction is as follows:
ClO-→(Cl)·+(O-)· (6)
(O-)·+H2O→·OH+OH (7)
HOCl+hv→·OH+Cl· (8)
SO4 2-+hv→(SO4 -)·+e- (9)
the device has the advantages of saving energy, reducing operation cost, having the function of storing electricity, ensuring that the electrocatalysis process is not affected by the existence of sunlight, ensuring continuous 24-hour operation under any special weather condition and ensuring continuous treatment of wastewater. The photovoltaic solar power supply system and the storage battery are connected with the electric control cabinet and the microcomputer automatic control system, so that unified management and control of electrical equipment are facilitated, self-regulation control of the sewage treatment device can be realized through the microcomputer automatic control system, and operation and maintenance of the equipment are simpler.
According to the invention, DSA is selected as an anode, and the refractory organic matters and ammonia nitrogen in the electrified wastewater are removed through the process of radical groups generated by anodic electrochemical oxidation, so that the radical group oxidation efficiency is high, the organic matters can be thoroughly oxidized into carbon dioxide and water, the degradation efficiency of the traditional biochemical treatment system is improved, and the advanced treatment is enhanced.
The invention enhances the efficiency of the electrode plate for electrocatalytic oxidation of pollutants by focusing sunlight on the electrochemical reactor, saves the power consumption required by pollutant degradation, effectively shortens the reaction time and ensures that the wastewater degradation process is more efficient.
The anode electrode of the cylindrical reactor is arranged to be in a circular arc shape, so that the effective reaction area of electrocatalytic oxidation is enlarged, and the irradiation of auxiliary sunlight is more effective and convenient; the anode and the cathode are arranged on two sides of the reactor to be separated as far as possible, so that the interference of the anode and the cathode oxidation reduction reaction is reduced. Meanwhile, water flow enters from the bottom of the container, flows through the cathode region firstly and then enters the anode region through the water flow dispersing filter screen, the water flow turbulence degree is effectively enhanced due to the water flow dispersing filter screen, the mass transfer effect is improved, the whole water flow is in a plug flow state, stirring is not additionally added, and a good treatment effect can be achieved.
The integrated photoelectrochemical treatment device driven by solar energy is in charge of providing energy by sunlight, and firstly, the light energy is converted into electric energy by a photovoltaic cell for electrochemical sewage degradation; and secondly, sunlight is used as an auxiliary light source, and the electrochemical degradation efficiency is improved by adding the sunlight, so that the wastewater treatment process is strengthened, and the wastewater can be discharged up to the standard. The removal rate of organic matters in the wastewater reaches 85-95 percent, and the removal rate of ammonia nitrogen reaches 85-100 percent. The device is suitable for distributed sewage treatment in areas rich in solar energy, which is not brought into urban municipal pipe networks, such as domestic sewage in rural areas far away in the northwest, mariculture wastewater in sea areas close to the equator, domestic sewage treatment of mobile ships in offshore operation and the like.
Drawings
FIG. 1 is a schematic view of a green photoelectric wastewater treatment device using sunlight as a driving force;
FIG. 2 is a schematic longitudinal section through a cylindrical reactor 8;
FIG. 3 is a schematic view of a transparent light window 8-1-3 on the cylinder 8-1 in example 1;
fig. 4 is a schematic diagram of the condensing light path of the revolved parabolic condenser 7;
in the figure: 1 is a solar photovoltaic panel battery 1, 2 is a storage battery, 3 is an electric control cabinet and a microcomputer automatic control system, 4 is a composite pretreatment tank, 4-1 is a grating filtering area, 4-1-1 is a water inlet, 4-2 is an inclined plate sedimentation area, 4-2-1 is a water outlet, 5 is a biochemical tank, 5-1 is an aeration pump, 5-2 is a biochemical inlet, 5-3 is a biochemical outlet, 6 is a centrifugal pump, 7 is a rotary paraboloid condenser, and 8 is a cylindrical reaction condenserThe device comprises a reactor, 8-1 is a reactor cylinder, 8-1-1 is a water inlet, 8-1-2 is a water outlet, 8-1-3 is a transparent light window, 8-2 is an arc anode, 8-3 is a rod-shaped cathode, and 8-4 is a water flow dispersing filter screen; dotted line in the figure
Figure BDA0002983873740000041
A circuit schematic line;
Detailed Description
The following examples are used to demonstrate the beneficial effects of the present invention:
example 1: the green photoelectric wastewater treatment device taking sunlight as a driving force in the embodiment consists of a photovoltaic and electricity storage module 1, a pretreatment module 2 and an illumination cylindrical electrochemical reactor module;
the photovoltaic and electric storage module consists of a solar photovoltaic panel battery 1, a storage battery 2, an electric control cabinet and a microcomputer automatic control system 3; the solar photovoltaic panel battery 1 directly supplies power for output in sunny days and stores electricity for the storage battery 2, the storage battery 2 supplies power for output in night or cloudy days, and the electric control cabinet and the microcomputer automatic control system 3 adjust the power supply mode;
the pretreatment module consists of a composite pretreatment tank 4, a biochemical tank 5 and a centrifugal pump 6, wherein the composite pretreatment tank 4 consists of a grating filtering area 4-1 and an inclined plate sedimentation area 4-2; an aeration pump 5-1 is arranged in the biochemical tank 5;
the lower part of the side wall of the grating filtering area 4-1 is provided with a water inlet 4-1-1, and the upper part of the side wall of the inclined plate sedimentation area 4-2 is provided with a water outlet 4-2-1;
an aeration pump 5-1 is arranged in the biochemical tank 5; the upper part of one side wall of the biochemical pool 5 is provided with a biochemical inlet 5-2, and the lower part of the side wall is provided with a biochemical outlet 5-3;
the illumination cylindrical electrochemical reactor module consists of a rotary paraboloid condenser 7 and a cylindrical reactor 8, the cylindrical reactor 8 is transversely arranged, and the cylindrical reactor 8 consists of a cylinder 8-1, an arc anode 8-2, a rod-shaped cathode 8-3 and a water flow dispersing filter screen 8-4 with the aperture of 20 mm;
an arc anode 8-2 and a rod-shaped cathode 8-3 are arranged in the cylinder 8-1, wherein the arc anode 8-2 is an arc titanium-based ruthenium iridium oxide electrode, the rod-shaped cathode 8-3 is a ruthenium iridium coated titanium-based metal oxide electrode, the arc anode 8-2 is close to the top of the cylinder 8-1, the rod-shaped cathode 8-3 is close to the bottom of the cylinder 8-1, and the distance between the arc anode 8-2 and the inner wall of the cylinder 8-1 is equal to the distance between the rod-shaped cathode 8-3 and the wall of the reactor cylinder 3-2-1; the water flow dispersing filter screen 8-4 is transversely arranged above the rod-shaped cathode 8-3, a water inlet 8-1-1 is arranged at the bottom of one side of the cylinder 8-1, and a water outlet 8-1-2 is arranged at the top of the opposite side; the barrel body 8-1 is made of organic glass, and transparent light windows 8-1-3 made of quartz glass are respectively embedded in the lower side of the barrel body;
the rotary paraboloidal condenser 7 is arranged at two sides of the outside of the cylindrical reactor 8, and the rotary paraboloidal condenser 7 focuses sunlight to the arc-shaped anode 8-2 through the quartz glass light window; the rotary paraboloid condenser lenses 7 are 4 and are respectively positioned at two sides of the cylindrical reactor 8;
a water outlet 4-2-1 of the composite pretreatment tank 4 is connected with a biochemical inlet 5-2 of the biochemical tank 5; a biochemical outlet 5-3 of the biochemical pool 5 is connected with a water inlet 8-1-1 of the cylinder body 8-1 through a centrifugal pump 6;
the photo-electricity generation and storage module is connected with the aeration pump and the centrifugal pump 6 of the biochemical pool 2-2 through a circuit to supply electricity to the biochemical pool; meanwhile, the positive end of the photo-generating and electricity-storing module is connected with the arc anode 8-2, and the negative end is connected with the rod-shaped cathode 8-3.
The device of the embodiment has the following action principle: the photovoltaic and electricity storage module is the power core of the whole device, the electric energy required by the operation of the device is provided by the solar photovoltaic panel battery 1, the storage battery 2 plays a role in storing electricity in the daytime in sunny days and transmitting electricity in cloudy days or at night, so that the whole processing device can continuously operate when needed. The electric control cabinet and the microcomputer automatic control system 3 are used for controlling the conversion of power supply and the start and stop of the whole wastewater treatment system, and simultaneously can monitor the running state of the device on line. The wastewater firstly enters a composite pretreatment tank 4 for primary pretreatment, and aims to remove large particles, gravel and other impurities insoluble in water so as to prevent interference on subsequent electrochemical treatment. The pretreated wastewater enters a biochemical tank 5, the biochemical tank has great removal contribution to organic matters and ammonia nitrogen, most pollutants can be removed, and the hydraulic load of the illumination cylindrical reactor 8 can be adjusted more flexibly, so that the treatment degree of the reactor becomes more controllable. The anode 8-2 of the cylindrical reactor 8 is in a circular arc shape, and the cathode 8-3 is in a rod shape, so that the anode can better receive sunlight gathered by the rotary paraboloid condenser, and the photoelectric synergistic degradation effect is more efficient. The arrangement of the water flow dispersing filter screen 8-4, the water inlet 8-1-1 and the water outlet 8-1-2 of the reactor ensures that the water flow is in an integral plug flow and local turbulence state, accelerates mass transfer and ensures that the wastewater treatment process is more efficient; organic pollutants in the wastewater in the cylindrical reactor 8 are in contact with the cathode 8-3 to carry out a reduction process, so that the toxicity of toxic pollutants can be reduced, after the organic pollutants enter an anode region, a plurality of types of refractory organic matters in the wastewater can be thoroughly oxidized into carbon dioxide through various nonselective active free radical oxidation groups generated by the photoelectric synergistic effect of the anode, nitrogen in nitrogen-containing organic matters in the wastewater is discharged in a nitrogen form, and the treated wastewater is discharged through a water outlet.
The method for treating photoelectrochemical wastewater by using the green photoelectricity wastewater treatment device taking the ether sunlight as the driving force in the embodiment 1 comprises the following steps:
the inlet water is from the aquaculture wastewater of the seawater fishery in the south China sea, the aquaculture wastewater is micro-polluted water, the content of ammonia nitrogen and antibiotics in the water is high, wherein the concentration of ammonia nitrogen is 12-20 mg/L, the concentration of total organic carbon is 10-16 mg/L, the wastewater to be treated enters a grating filtering area 4-1 of a composite pretreatment tank 4 through a water inlet 4-1-1 to remove large particle impurities, then enters an inclined plate precipitation area 4-2 to be precipitated to remove water-insoluble impurities including gravel, then is discharged through a water outlet 4-2-1, and then enters a biochemical tank through a biochemical inlet 5-2 to be subjected to biochemical treatment to remove partial organic matters and ammonia nitrogen in the wastewater;
secondly, injecting the wastewater treated by the biochemical pool 4 into a cylindrical reactor 8 by a centrifugal pump 6, wherein the wastewater firstly flows through a cathode region and then enters an anode region through a water flow dispersion filter screen 8-4, the voltage between an arc anode 8-2 and a rod-shaped cathode 8-3 is 5V, and the current density of the arc anode 8-2 is 50mA/cm2Meanwhile, the paraboloid condenser 7 is rotated to focus the sunlight to the arc anode 8-2 through the transparent light window 8-1-3 to control waterThe force retention time is 30min, and water finally flows out from the water outlet 8-1-2 to finish the wastewater treatment.
Through the treatment of this embodiment, through the light intensifying effect, the organic matter clearance in the waste water is 95%, and the ammonia nitrogen clearance is 100%, has strengthened the getting rid of antibiotic and ammonia nitrogen in the breed district aquatic under the condition of no external electric wire netting, has greatly reduced the pollution of mariculture industry to marine environment.
The method for treating photoelectrochemical wastewater by using the green photoelectricity wastewater treatment device taking the ether sunlight as the driving force in the embodiment 1 comprises the following steps:
firstly, the inlet water comes from domestic wastewater of residences of certain army in northwest China, and the SS content in the domestic wastewater is 220mg/L and BOD5The content is 150mg/L, the COD content is 200mg/L, and the TN content is 40 mg/L; wastewater to be treated enters a grating filtering area 4-1 of a composite pretreatment tank 4 through a water inlet 4-1-1 to remove large particle impurities, then enters an inclined plate sedimentation area 4-2 to be precipitated to remove water-insoluble impurities including gravel, is discharged through a water outlet 4-2-1, and then enters a biochemical tank through a biochemical inlet 5-2 to be subjected to biochemical treatment to remove partial organic matters and ammonia nitrogen in the wastewater; after the treatment of the first step, the indexes of each part are removed by about 50 to 60 percent, the SS content is 108mg/L, BOD5The content is 75mg/L, the COD content is 105mg/L, and the TN content is 21 mg/L;
secondly, injecting the wastewater treated by the biochemical pool 4 into a cylindrical reactor 8 by a centrifugal pump 6, wherein the wastewater firstly flows through a cathode region and then enters an anode region through a water flow dispersion filter screen 8-4, the voltage between an arc anode 8-2 and a rod-shaped cathode 8-3 is 7V, and the current density of the arc anode 8-2 is 10mA/cm2Meanwhile, the rotary paraboloid condenser 7 focuses sunlight onto the arc-shaped anode 8-2, the hydraulic retention time is controlled to be 2 hours, and water finally flows out of the water outlet 8-1-2, so that wastewater treatment is completed.
Through the treatment of this embodiment, through the light effect, the average clearance 85% of organic matter, the ammonia nitrogen clearance 85% is about, and remaining pollutant can further be got rid of in the advanced waste water treatment, the fragile ecological environment in protection locality that can be better.

Claims (8)

1. A green photoelectric wastewater treatment device taking sunlight as driving force is characterized by comprising a photovoltaic and electricity storage module, a pretreatment module and an illumination cylindrical electrochemical reactor module;
the photovoltaic and electric storage module consists of a solar photovoltaic panel battery (1), a storage battery (2), an electric control cabinet and a microcomputer automatic control system (3); the solar photovoltaic panel battery (1) directly supplies power to output in sunny days, the storage battery (2) stores power, the storage battery (2) supplies power to output in night or cloudy days, and the electric control cabinet and the microcomputer automatic control system (3) adjust the power supply mode;
the pretreatment module consists of a composite pretreatment tank (4), a biochemical tank (5) and a centrifugal pump (6), wherein the composite pretreatment tank (4) consists of a grating filtering area (4-1) and an inclined plate sedimentation area (4-2); an aeration pump (5-1) is arranged in the biochemical tank (5);
a water inlet (4-1-1) is arranged at the lower part of the side wall of the grating filtering area (4-1), and a water outlet (4-2-1) is arranged at the upper part of the side wall of the inclined plate sedimentation area (4-2);
an aeration pump (5-1) is arranged in the biochemical tank (5); the upper part of one side wall of the biochemical pool (5) is provided with a biochemical inlet (5-2), and the lower part of the side wall is provided with a biochemical outlet (5-3);
the illumination cylindrical electrochemical reactor module consists of a rotary paraboloid condenser (7) and a cylindrical reactor (8), the cylindrical reactor (8) is transversely placed, and the cylindrical reactor (8) consists of a cylinder body (8-1), an arc-shaped anode (8-2), a rod-shaped cathode (8-3) and a water flow dispersion filter screen (8-4);
an arc anode (8-2) and a rod-shaped cathode (8-3) are arranged in the cylinder (8-1), the arc anode (8-2) is close to the top of the cylinder (8-1), the rod-shaped cathode (8-3) is close to the bottom of the cylinder (8-1), a water flow dispersing filter screen (8-4) is transversely arranged above the rod-shaped cathode (8-3), a water inlet (8-1-1) is arranged at the bottom of one side of the cylinder (8-1), and a water outlet (8-1-2) is arranged at the top of the opposite side; the barrel body of the barrel body (8-1) is made of a light-transmitting material or a transparent light window (8-1-3) is arranged on the barrel body;
the rotary paraboloid condenser (7) is arranged at two sides of the outside of the cylindrical reactor (8), and the rotary paraboloid condenser (7) focuses sunlight onto the arc-shaped anode (8-2) through the transparent light window;
a water outlet (4-2-1) of the composite pretreatment tank (4) is connected with a biochemical inlet (5-2) of the biochemical tank (5); a biochemical outlet (5-3) of the biochemical pool (5) is connected with a water inlet (8-1-1) of the cylinder body (8-1) through a centrifugal pump (6);
the photo-electricity generation and storage module is connected with an aeration pump and a centrifugal pump (6) of the biochemical pool 2-2 through a circuit to supply electricity to the biochemical pool; meanwhile, the positive end of the photo-generating and electricity-storing module is connected with the arc anode (8-2), and the negative end is connected with the rod-shaped cathode (8-3).
2. A sunlight-driven green photoelectric wastewater treatment device according to claim 1, wherein the transparent window on the cylinder (8-1) is made of organic glass, glass or quartz.
3. A solar-powered green photovoltaic wastewater treatment plant as defined in claim 1 or 2, characterized in that the distance between said arc anode (8-2) and the inner wall of said cylindrical body (8-1) is equal to the distance between said rod-shaped cathode (8-3) and the wall of said reactor cylinder (3-2-1).
4. A green photoelectric waste water treatment device using solar energy as driving force according to claim 1 or 2, characterized in that 2-4 rotary paraboloidal condenser lenses (7) are respectively arranged at two sides of the cylindrical reactor (8).
5. A sunlight-driven green photoelectric wastewater treatment device according to claim 1 or 2, wherein the arc anode (8-2) is arc titanium-based ruthenium iridium oxide electrode.
6. A solar-powered green photovoltaic wastewater treatment plant according to claim 1 or 2, characterized in that said rod-like cathode (8-3) is a ruthenium iridium coated titanium based metal oxide electrode.
7. A green photoelectric waste water treatment device taking solar light as driving force according to claim 1 or 2, characterized in that the aperture of the water flow dispersion filter screen (8-4) is 18-23 mm.
8. The method for photoelectrochemical wastewater treatment by using the green photovoltaic wastewater treatment apparatus using solar power as a driving force according to claim 1, comprising the steps of:
firstly, wastewater to be treated enters a grating filtering area (4-1) of a composite pretreatment tank (4) through a water inlet (4-1-1) for filtering, then enters an inclined plate sedimentation area (4-2) for sedimentation, is discharged through a water outlet (4-2-1), and then enters a biochemical tank through a biochemical inlet (5-2) for biochemical treatment;
secondly, injecting the wastewater treated by the biochemical pool 4 into a cylindrical reactor (8) by using a centrifugal pump (6), enabling the wastewater to flow through a cathode area firstly and then enter an anode area through a water flow dispersion filter screen (8-4), enabling the voltage between an arc-shaped anode (8-2) and a rod-shaped cathode (8-3) to be 3-10V, and enabling the current density of the arc-shaped anode (8-2) to be 5-50 mA/cm2Meanwhile, the rotating paraboloid condenser (7) focuses the sunlight to the arc anode (8-2) through the transparent light window (8-1-3), the hydraulic retention time is controlled to be 0.5 h-3 h, and finally the sunlight flows out from the water outlet (8-1-2), so that the wastewater treatment is completed.
CN202110294669.6A 2021-03-19 2021-03-19 Green photoelectric wastewater treatment device and method using sunlight as driving force Pending CN113024040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110294669.6A CN113024040A (en) 2021-03-19 2021-03-19 Green photoelectric wastewater treatment device and method using sunlight as driving force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110294669.6A CN113024040A (en) 2021-03-19 2021-03-19 Green photoelectric wastewater treatment device and method using sunlight as driving force

Publications (1)

Publication Number Publication Date
CN113024040A true CN113024040A (en) 2021-06-25

Family

ID=76471961

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110294669.6A Pending CN113024040A (en) 2021-03-19 2021-03-19 Green photoelectric wastewater treatment device and method using sunlight as driving force

Country Status (1)

Country Link
CN (1) CN113024040A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008264659A (en) * 2007-04-19 2008-11-06 Blue Aqua Industry Kk Waste water treatment device
CN101693560A (en) * 2009-10-21 2010-04-14 华北水利水电学院 Integral solar energy photoelectricity water-treatment device
CN101734750A (en) * 2008-11-19 2010-06-16 中国科学院生态环境研究中心 Method for performing electrochemical advanced treatment on landfill leachate based on ultraviolet reinforcement
CN101891284A (en) * 2010-07-09 2010-11-24 北京大学 Advanced garbage leachate treatment method
CN105236685A (en) * 2015-10-28 2016-01-13 中国海洋石油总公司 Zero-discharge treatment method for offshore-platform domestic sewage
CN106915802A (en) * 2017-04-12 2017-07-04 哈尔滨工业大学 The integral type electrochemical reaction appts and processing method of organic wastewater with difficult degradation thereby treatment
CN111003861A (en) * 2019-12-16 2020-04-14 国家海洋局北海海洋环境监测中心站 Chemistry experiment room drainage clarification plant
CN111646632A (en) * 2020-05-11 2020-09-11 南京岱蒙特科技有限公司 Green energy-saving photoelectrocatalysis water treatment system and water treatment method thereof
CN212076711U (en) * 2020-03-06 2020-12-04 江苏欧亚水秀景观工程有限公司 Municipal sewage treatment equipment with sterilization function

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008264659A (en) * 2007-04-19 2008-11-06 Blue Aqua Industry Kk Waste water treatment device
CN101734750A (en) * 2008-11-19 2010-06-16 中国科学院生态环境研究中心 Method for performing electrochemical advanced treatment on landfill leachate based on ultraviolet reinforcement
CN101693560A (en) * 2009-10-21 2010-04-14 华北水利水电学院 Integral solar energy photoelectricity water-treatment device
CN101891284A (en) * 2010-07-09 2010-11-24 北京大学 Advanced garbage leachate treatment method
CN105236685A (en) * 2015-10-28 2016-01-13 中国海洋石油总公司 Zero-discharge treatment method for offshore-platform domestic sewage
CN106915802A (en) * 2017-04-12 2017-07-04 哈尔滨工业大学 The integral type electrochemical reaction appts and processing method of organic wastewater with difficult degradation thereby treatment
CN111003861A (en) * 2019-12-16 2020-04-14 国家海洋局北海海洋环境监测中心站 Chemistry experiment room drainage clarification plant
CN212076711U (en) * 2020-03-06 2020-12-04 江苏欧亚水秀景观工程有限公司 Municipal sewage treatment equipment with sterilization function
CN111646632A (en) * 2020-05-11 2020-09-11 南京岱蒙特科技有限公司 Green energy-saving photoelectrocatalysis water treatment system and water treatment method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MAURICIO BUSTAMANTE: "A self-sustaining high-strength wastewater treatment system using solar-bio-hybrid power generation", 《BIORESOURCE TECHNOLOGY》 *
陈淼: "光伏/水处理耦合系统的实验研究", 《中国优秀硕士学位论文全文数据库-工程科技I辑》 *

Similar Documents

Publication Publication Date Title
CN104030520B (en) A kind of marine domestic sewage treatment system
CN205368020U (en) Fine motion power dispersibility sewage treatment integrated device based on scene is complementary
CN102070268A (en) Environmentally-friendly treatment method and device for organic sewage
CN202390287U (en) Internal iron-carbon UASB-SBR (Upflow Anaerobic Sludge Blanket-Sequencing Batch Reactor) coupling system for treatment of printing and dyeing wastewater
CN101195501A (en) Fecal sewage decolorizing method and device
CN106745676A (en) A kind of ecological many negative electrode urine processing devices and method
CN105417792A (en) Landfill leachate concentrated water treating device and treating system
CN113024040A (en) Green photoelectric wastewater treatment device and method using sunlight as driving force
CN203938560U (en) A kind of marine domestic sewage treatment system
CN109970159A (en) A kind of solar light-heat power-generation processing sewage apparatus
CN114871253A (en) Kitchen waste leachate treatment system and method
CN214654199U (en) Sewage treatment circulation system based on solar pond electricity generation
CN105776684B (en) A kind of method that urban wastewater treatment and resource recycling utilize
CN114620904A (en) Spiral phage bacterium algae bed sewage deep purification device
CN114988638A (en) Black and odorous water body treatment system
CN210656513U (en) Domestic sewage treatment equipment
CN210505741U (en) Membrane bioreactor and sewage treatment system
CN113429075A (en) Black-odor river restoration system and application thereof
CN209081658U (en) It is percolated liquid processing device
CN102249486A (en) Electrochemical-biological method combination device for treating printing and dyeing wastewater and wastewater treating method
KR101112566B1 (en) System for Dewatering and Reducing quantity of Organic sludge by Two step Electrolysis with Matrix type electrode
CN219603413U (en) Circulating water flushing sewer-free integrated ecological toilet system
CN204824496U (en) Integration view water treatment facilities
CN209468243U (en) A kind of slot type deep purification of waste water device
CN215667564U (en) Roof rainwater treatment integrated device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination