CN106396322A - Pretreatment method of two-stage electrochemical reinforcement of anaerobic digestion performance of sludge - Google Patents
Pretreatment method of two-stage electrochemical reinforcement of anaerobic digestion performance of sludge Download PDFInfo
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- CN106396322A CN106396322A CN201610430404.3A CN201610430404A CN106396322A CN 106396322 A CN106396322 A CN 106396322A CN 201610430404 A CN201610430404 A CN 201610430404A CN 106396322 A CN106396322 A CN 106396322A
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- Prior art keywords
- sludge
- anaerobic digestion
- treatment
- electrochemical pre
- anaerobic
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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
- Y02W10/20—Sludge processing
Abstract
The invention discloses a pretreatment method of two-stage electrochemical reinforcement of the anaerobic digestion performance of sludge. The method is composed of two parts, i.e., two-stage electrochemical pretreatment and anaerobic fermentation of sludge. Through the electrochemical pretreatment, residual sludge of a sewage treatment plant is improved in the performance of anaerobic digestion for production of biogas. Specifically, residual sludge from the sewage treatment plant is concentrated, then subjected to the two-stage electrochemical pretreatment and then added into an anaerobic fermentation tank. Through reinforcement of the two-stage electrochemical pretreatment, the accumulative methane output after anaerobic digestion of the residual sludge from the sewage treatment plant is increased by 0.5 to 1.5 times and retention time needed for stabilization of the sludge is reduced by 5 to 9 d compared with one-stage electrochemical pretreatment with same energy consumption. The method is applicable to treatment of the residual sludge of the sewage treatment plant and recovers biomass energy included in organic matters in recovered sludge in the form of methane; and the method is also applicable to reconstruction of conventional anaerobic digestion systems for sludge so as to improve the benefits of anaerobic digestion of sludge.
Description
Technical field
The present invention relates to anaerobic sludge digestion intensive treatment technical field is and in particular to a kind of two-part electrochemically strengthening sludge
The preprocess method of anaerobic digestion performance.
Background technology
With the continuous development of national economy, China's cities and towns industrial wastewater and sanitary sewage discharge capacity are continuously increased.In dirt
In water treatment procedure, typically can produce the dewatered sludge accounting for sewage volume 0.02%, thus enormous amount, with sewage disposal
Factory continues construction and stricter environmental standard, and the yield of mud also will be further increased, and becomes at present and urgently locates
One of MSW of reason.The process that municipal sewage plant is produced with mud is disposed, and method main at present is permissible
It is divided into:34 kinds of technique skills such as aerobic sigestion, anaerobic digestion, sludge drying, chemically stable, compost, burning and landfill
Art.And excess sludge has the characteristics that high-moisture percentage, high organic principle, contain the harmful components such as pathogen, it is no simultaneously
It is particularly significant for evilization process is environmentally safe.
Stabilizing treatment is sludge reduction, innoxious important means, is also the important step of specific resistance to filtration
One of.Sludge stabilization treatment method is a lot, and wherein, the anaerobic digestion being characterized with Biostatic is due to operating cost
Low, safe and reliable and widely adopted.Anaerobic sludge digestion can reach good stablizing effect, and municipal sludge can be through dense
Reach the purpose of minimizing and stabilisation after contracting/anaerobic digestion/dehydration, realize follow-up agricultural, the recyclable combustion gas of generation
(hydrogen, biogas etc.) can be integrated into utilizing.Sludge anaerobic digestion gas production not only can solve the problem of outlet of mud, also
The recycling of achievable mud, has very high using value.However, research shows that hydrolysis stage is sludge digestion
During rate-limiting step, lead in practice, anaerobic digestion exist sludge retention time length, facility take up an area face
Amass the problems such as big, factor of created gase and gas production are relatively low, operation management is complicated, fermentation period is long.At present, a lot of researchs are passed through
Using various preprocessing means, to promote the raising of sludge anaerobic performance, but the sludge anaerobic methanogenic benefit of fermentation is still
So not high.If sludge anaerobic fermentation methane phase will obtain practical application, its methane production also needs to improve further.
Content of the invention
It is an object of the invention to provide a kind of operating cost is low, process is simple, easy to operate, energy consumption is low, more can improve
The preprocess method of the two-part electrochemically strengthening sludge anaerobic digestion performance of anaerobic digestion performance of sludge.The present invention be in order to
Overcome the inefficient shortcoming of current anaerobic sludge digestion methane phase, by stagewise electrochemical pre-treatment and anaerobic digestion
Synergism, improves anaerobic digestion performance of sludge.
The purpose of the present invention is achieved through the following technical solutions：
The present invention relates to a kind of preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance, pretreated dirt
Mud enters the anaerobic digestion stage, and it is pre- that the excess sludge that methods described includes that sewage treatment plant is produced carries out two-part electrochemistry
Process；
Wherein, the process voltage of first paragraph electrochemical pre-treatment is 100～200V, and process time is 5～30min, pole plate
Spacing is 2～4cm；
The process voltage of second segment electrochemical pre-treatment be 5～20V, process time be 15～60min, polar plate spacing be 2～
4cm.
Preferably, described excess sludge refers to：By the excess sludge of the second pond producing during Biochemical method, through (from
The heart) concentration to concentration be 28～32g/L.
Preferably, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value and be reduced to less than 6.0.
In the present invention, the electrochemical pre-treatment device that two-part electrochemical pre-treatment adopts is by adjustable DC power supply, wire
Form with two electrodes, two electrodes are fixed in electrochemical pre-treatment device, two electrode pad wires and adjustable DC power supply phase
Even.State in electrochemical pre-treatment device two fixing electrode pads can by all conductive materials (as ferrum, copper, aluminum,
The metals such as titanium, platinum and graphite etc. are nonmetallic) to make, shape can be netted, block, strip, bar-shaped.
Preferably, the power supply that described first paragraph electrochemical pre-treatment, second segment electrochemical pre-treatment adopt is forward and reverse arteries and veins
Rush formula regulated power supply.There is provided power supply by positive and negative pulse formula regulated power supply respectively during two sections of electrochemical pre-treatment, control the
The process voltage of one section of electrochemical pre-treatment is 100～200V, and the process voltage of second segment electrochemical pre-treatment is 5～20V.
Wherein, the process pulse frequency of first paragraph electrochemistry can be selected for 100～250HZ, the pulse frequency of second segment electrochemical treatments
Can be selected for 20～50HZ.
Preferably, the mud after two-part electrochemical pre-treatment enters anaerobic digestion after the stewing process of 4～8 hours
Stage.
Preferably, the mud after two-part electrochemical pre-treatment is transported to anaerobism after the stewing process of 4～8 hours and sends out
In fermentation tank, in anaerobic fermentation tank, the stable effective volume (70%) in fermentation tank of sludge quantity, uses nitrogen removal system using front
In air (deoxygenation), and by the temperature control of anaerobic fermentation tank at 35 ± 0.5 DEG C, adjust pH value and be about 6.8 ± 0.2.
The volume size of anaerobic fermentation tank does not limit, from 100ml to 1000m3, anaerobic fermentation tank shape do not limit, be provided with into
Material mouth, discharging opening, air vent, temperature control system, stirring system, sludge delivery pump.Anaerobic fermentation tank can adopt
Continuous feeding and discharging, it would however also be possible to employ gap input and output material.
Preferably, the gas that sludge anaerobic sweat (i.e. anaerobic digestion stage) produces (mainly contains methane, titanium dioxide
Carbon) discharge from the air vent of fermentation tank, it is passed in gas holder tank or directly as fuel combustion.
The present invention mainly passes through the Effect of Pretreatment of two-part electrochemistry, the anaerobic digestion performance of reinforcement sludge, significantly shortens
The anaerobic digestion cycle.The present invention first passes through high voltage Effect of Pretreatment, so that the flco of mud is significantly destroyed, with
When promote part microbial cell film to rupture, make intracellular organic matter from solid phase enter aqueous phase；Secondly adopt low-voltage pre-
Processing method, produces the oxidizing substances such as hydroxyl radical free radical, so that the part difficult degradation macromolecular substances in liquid phase is resolved into little
Molecular organic, promotes hydrolysis and the acidifying process of anaerobic sludge digestion, and then improves anaerobic digestion speed, shortens anaerobism
Digestion period.In addition, the oxidizing substance such as hydroxyl radical free radical producing in electrochemical pre-treatment process, easily microorganism is produced
Raw destruction and toxic action.So, before anaerobic digestion is carried out to pretreated mud, when need to carry out one section to it
Between stewing process, so that these oxidizing substances is eliminated, be beneficial to the carrying out of follow-up anaerobic digestion methane phase process.
Compared with prior art, the present invention has the advantages that：
The present invention improves sludge microbe anaerobic digestion performance by the electrochemical pre-treatment technology of two-part, obtains methane.
Two-part electrochemical treatments technology, can first destroy mud flocculation structure, discharge inclusions therein, then passes through low-voltage
Process, larger molecular organicses are degraded into the small organic molecule that can be utilized by anaerobe；And for unistage type electricity
Chemical treatment method, and micro voltage commonly employed in the art, micro-current carry out sludge pretreatment and put forward efficient method,
Merely the limited Organic substance of mud flco periphery can only be carried out the degraded of part it is impossible to release some internal Organic substances
Put to liquid phase, preferably utilized by microorganism, so leading to anaerobe relatively low using concentration of substrate, anaerobism disappears
Change effect poor.So the capacity usage ratio of electrochemistry can be effectively improved using two-part electrochemical treatments technology.And
Existing " the sludge reduction preprocess method of electrochemistry/sodium hypochlorite coupling ", using the coupling application of sodium hypochlorite
Improve the treatment effect of electrochemistry, but the application of sodium hypochlorite, the generation of chloride ion can be led to, and chloride ion is easily right
Equipment produces corrosiveness, and the risk to environment.In a word, by the electrochemical pre-treatment of two-part
Compared with the unistage type electrochemical pre-treatment technology of same consumption energy, the methane that can effectively improve sludge anaerobic fermentation produces method
Rate, shortens the anaerobic digestion cycle, and the cumulative methane yield of mud can improve 0.5～1.5 times, and mud reaches stabilisation institute
The time of staying needing, this technology had preferable application prospect and promotional value than comparison shortening 5～9 days.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to those skilled in the art
Member further understands the present invention, but the invention is not limited in any way.It should be pointed out that the common skill to this area
For art personnel, without departing from the inventive concept of the premise, some deformation can also be made and improve.These broadly fall into
Protection scope of the present invention.
Embodiment 1
Obtain excess sludge from Minhang District, Shanghai sewage treatment plant, by precipitation, centrifugal concentrating, record process mud
Concentration be 32g DS/L, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value be reduced to 6.0
Below.Two-part electrochemical pre-treatment is respectively adopted positive and negative pulse formula regulated power supply；First paragraph electrochemical pre-treatment condition
It is 100V for voltage, process time is 5min, polar plate spacing is 2cm.Then second segment electrochemical pre-treatment, bar are carried out
Part is 5V for voltage, and process time is 15min, and polar plate spacing is 3cm.Dirt after two-part electrochemical pre-treatment
Mud pumps into digester after standing 4 hours from electrochemical pre-treatment reaction unit.First use in anaerobic sludge digestion startup stage
Air (deoxygenation) in nitrogen removal system, to ensure the anaerobic environment in digester；Temperature in digester passes through temperature control
System controls temperature at 35 ± 0.5 DEG C, using acid-alkali accommodation pH value 6.8 ± 0.2.Mud after anaerobic digestion, result table
Bright, the accumulation methane production of the anaerobic sludge digestion after two-part electrochemical pre-treatment is than the unistage type electrochemistry of same consumption energy
Pretreated improve 0.5 times, and mud reaches the shorter residence time needed for stabilisation 5 days.
Embodiment 2
Obtain excess sludge from Minhang District, Shanghai sewage treatment plant, by precipitation, centrifugal concentrating, record process mud
Concentration be 28g DS/L, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value be reduced to 6.0
Below.Two-part electrochemical pre-treatment is respectively adopted positive and negative pulse formula regulated power supply；First paragraph electrochemical pre-treatment condition
It is 200V for voltage, process time is 30min, polar plate spacing is 3cm.Then carry out second segment electrochemical pre-treatment,
Condition is 20V for voltage, and process time is 60min, and polar plate spacing is 4cm.After two-part electrochemical pre-treatment
Mud pumps into digester after standing 8 hours from electrochemical pre-treatment reaction unit.First in anaerobic sludge digestion startup stage
With the air (deoxygenation) in nitrogen removal system, to ensure the anaerobic environment in digester；Temperature in digester passes through temperature
Control system controls 35 ± 0.5 DEG C of temperature, using acid-alkali accommodation pH value 6.8 ± 0.2.Mud after anaerobic digestion, result table
Bright, the accumulation methane production of the anaerobic sludge digestion after two-part electrochemical pre-treatment is than the unistage type electrochemistry of same consumption energy
Pretreated improve 1.5 times, and mud reaches the shorter residence time needed for stabilisation 9 days.
Embodiment 3
Obtain excess sludge from Minhang District, Shanghai sewage treatment plant, by precipitation, centrifugal concentrating, record process mud
Concentration be 29g DS/L, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value be reduced to 6.0
Below.Two-part electrochemical pre-treatment is respectively adopted positive and negative pulse formula regulated power supply；First paragraph electrochemical pre-treatment condition
It is 150V for voltage, process time is 15min, polar plate spacing is 4cm.Then carry out second segment electrochemical pre-treatment,
Condition is 10V for voltage, and process time is 45min, and polar plate spacing is 2cm.After two-part electrochemical pre-treatment
Mud pumps into digester after standing 6 hours from electrochemical pre-treatment reaction unit.First in anaerobic sludge digestion startup stage
With the air (deoxygenation) in nitrogen removal system, to ensure the anaerobic environment in digester；Temperature in digester passes through temperature
Control system controls 35 ± 0.5 DEG C of temperature, using acid-alkali accommodation pH value 6.8 ± 0.2.Mud after anaerobic digestion, result table
Bright, the accumulation methane production of the anaerobic sludge digestion after two-part electrochemical pre-treatment is than the unistage type electrochemistry of same consumption energy
Pretreated improve 1.0 times, and mud reaches the shorter residence time needed for stabilisation 7 days.
Embodiment 4
Obtain excess sludge from Minhang District, Shanghai sewage treatment plant, by precipitation, centrifugal concentrating, record process mud
Concentration be 30g DS/L, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value be reduced to 6.0
Below.Two-part electrochemical pre-treatment is respectively adopted positive and negative pulse formula regulated power supply；First paragraph electrochemical pre-treatment condition
It is 180V for voltage, process time is 20min, polar plate spacing is 2cm.Then carry out second segment electrochemical pre-treatment,
Condition is 15V for voltage, and process time is 30min, and polar plate spacing is 3cm.After two-part electrochemical pre-treatment
Mud pumps into digester after standing 5 hours from electrochemical pre-treatment reaction unit.First in anaerobic sludge digestion startup stage
With the air (deoxygenation) in nitrogen removal system, to ensure the anaerobic environment in digester；Temperature in digester passes through temperature
Control system controls 35 ± 0.5 DEG C of temperature, using acid-alkali accommodation pH value 6.8 ± 0.2.Mud after anaerobic digestion, result table
Bright, the accumulation methane production of the anaerobic sludge digestion after two-part electrochemical pre-treatment is than the unistage type electrochemistry of same consumption energy
Pretreated improve 1.2 times, and mud reaches the shorter residence time needed for stabilisation 8 days.
Above are only several specific embodiments of the present invention, because sewage treatment process is different, the excess sludge of generation
Matter difference, and the cathode-anode plate material being adopted by electrochemical reactor is otherwise varied, therefore without prejudice to this
On the premise of invention essence and scope, some parameters of the present invention suitably can be adjusted, with suitable
Answer particular situation.But the design concept of the present invention is not limited thereto, all using this design, insubstantial is carried out to the present invention
Property change, all should belong to invade the scope of the present invention behavior.
Claims (7)
1. a kind of preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance, pretreated mud enters
The anaerobic digestion stage is it is characterised in that the excess sludge that methods described includes that sewage treatment plant is produced carries out two-part electricity
Chemical Pretreatment；
Wherein, the process voltage of first paragraph electrochemical pre-treatment is 100～200V, and process time is 5～30min, pole plate
Spacing is 2～4cm；
The process voltage of second segment electrochemical pre-treatment be 5～20V, process time be 15～60min, polar plate spacing be 2～
4cm.
2. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 1, its
It is characterised by, described excess sludge refers to：By the excess sludge of the second pond producing during Biochemical method, concentrated
Processing to concentration is 28～32g/L.
3. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 2, its
It is characterised by, before carrying out two-part electrochemical pre-treatment, adjust described excess sludge pH value and be reduced to less than 6.0.
4. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 1, its
It is characterised by, the power supply that described first paragraph electrochemical pre-treatment, second segment electrochemical pre-treatment adopt is positive and negative pulse
Formula regulated power supply.
5. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 1, its
It is characterised by, the mud after two-part electrochemical pre-treatment enters anaerobic digestion rank after the stewing process of 4～8 hours
Section.
6. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 5, its
It is characterised by, the mud after two-part electrochemical pre-treatment is transported to anaerobic fermentation after the stewing process of 4～8 hours
In tank, in anaerobic fermentation tank, the stable effective volume in fermentation tank of sludge quantity, the temperature control of anaerobic fermentation tank is existed
35 ± 0.5 DEG C, adjust pH value and be about 6.8 ± 0.2.
7. the preprocess method of two-part electrochemically strengthening sludge anaerobic digestion performance according to claim 5, its
It is characterised by, the gas producing in the anaerobic digestion stage is stored in gas holder tank or directly as fuel combustion.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231737A (en) * | 2018-09-30 | 2019-01-18 | 薛蔚琦 | The method for removing hydrogen sulfide in anaerobic digester system |
| CN109867422A (en) * | 2019-04-17 | 2019-06-11 | 四川环仕达节能环保科技有限公司 | A kind of excess sludge pretreatment unit and preprocess method |
| CN109896716A (en) * | 2017-12-07 | 2019-06-18 | 中国石化扬子石油化工有限公司 | A kind of electrochemically strengthening enzymatic is into excess sludge anaerobic digestion process |
| CN111470744A (en) * | 2020-04-13 | 2020-07-31 | 陈光浩 | Method for producing volatile organic acid by anaerobic fermentation of sludge |
| CN112876012A (en) * | 2021-01-08 | 2021-06-01 | 同济大学 | Method for improving anaerobic digestion performance of sludge and synchronously killing pathogenic microorganisms |
| CN115286108A (en) * | 2022-08-31 | 2022-11-04 | 西安理工大学 | Electrochemical treatment method for synchronously realizing sludge reduction and carbon source recovery |
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| CN101831462A (en) * | 2010-04-29 | 2010-09-15 | 中国科学院生态环境研究中心 | Anaerobic-fermentation hydrogen production method by pretreating and electrochemically strengthening sludge |
| CN104961308A (en) * | 2015-06-12 | 2015-10-07 | 辽宁大学 | Method of enhancing gradient phosphorus release for excess sludge by high-pressure pulse preprocessing technique |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101831462A (en) * | 2010-04-29 | 2010-09-15 | 中国科学院生态环境研究中心 | Anaerobic-fermentation hydrogen production method by pretreating and electrochemically strengthening sludge |
| CN104961308A (en) * | 2015-06-12 | 2015-10-07 | 辽宁大学 | Method of enhancing gradient phosphorus release for excess sludge by high-pressure pulse preprocessing technique |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896716A (en) * | 2017-12-07 | 2019-06-18 | 中国石化扬子石油化工有限公司 | A kind of electrochemically strengthening enzymatic is into excess sludge anaerobic digestion process |
| CN109896716B (en) * | 2017-12-07 | 2021-08-20 | 中国石化扬子石油化工有限公司 | Method for promoting anaerobic digestion of excess sludge by using electrochemical enhanced enzyme |
| CN109231737A (en) * | 2018-09-30 | 2019-01-18 | 薛蔚琦 | The method for removing hydrogen sulfide in anaerobic digester system |
| CN109867422A (en) * | 2019-04-17 | 2019-06-11 | 四川环仕达节能环保科技有限公司 | A kind of excess sludge pretreatment unit and preprocess method |
| CN111470744A (en) * | 2020-04-13 | 2020-07-31 | 陈光浩 | Method for producing volatile organic acid by anaerobic fermentation of sludge |
| CN112876012A (en) * | 2021-01-08 | 2021-06-01 | 同济大学 | Method for improving anaerobic digestion performance of sludge and synchronously killing pathogenic microorganisms |
| CN115286108A (en) * | 2022-08-31 | 2022-11-04 | 西安理工大学 | Electrochemical treatment method for synchronously realizing sludge reduction and carbon source recovery |
| CN115286108B (en) * | 2022-08-31 | 2024-01-19 | 西安理工大学 | Electrochemical treatment method for synchronously realizing sludge reduction and carbon recovery |
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