CN102795695B - Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water - Google Patents
Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water Download PDFInfo
- Publication number
- CN102795695B CN102795695B CN201210341735.1A CN201210341735A CN102795695B CN 102795695 B CN102795695 B CN 102795695B CN 201210341735 A CN201210341735 A CN 201210341735A CN 102795695 B CN102795695 B CN 102795695B
- Authority
- CN
- China
- Prior art keywords
- water outlet
- wastewater biochemical
- processed
- organic nano
- biochemical
- 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.)
- Active
Links
Images
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water. According to the invention, a continuous-flow electrochemical reactor of continuous flow is adopted for performing electrochemical oxidation treatment on the biochemical wastewater treatment yielding water, and the electrochemical reactor is provided with a chlorine separation electrode as the anode and a stainless steel plate as the cathode; and therefore, most biological-source organic nano-matters and organic nitrogen carried by the biological-source organic nano-matters in the biochemical wastewater treatment yielding water can be quickly and thoroughly removed. The method reduces pollution on the membrane material in the membrane separation process of the biochemical wastewater treatment yielding water, reduces the resistance of the membrane separation process and improves the membrane separation flux.
Description
Technical field
The invention belongs to technical field of waste water processing, be specifically related to the electrochemical oxidation removal method that wastewater biochemical is processed biogenic organic nano material in water outlet.
Background technology
Biological wastewater treatment is the effective ways of the processing organic waste water being widely used, and it can remove biodegradable organic pollutants a large amount of in organic waste water.At present, the biochemical treatment process adopting in environmental engineering mainly comprises traditional activated sludge process, trickle bed formula biofilter, microfiltration membrane bio-reactor, nitrated-denitrification biological process, and their Combined biochemical treating processes.In these wastewater biochemical treating processess, can produce a large amount of organic colloidal matters, they mainly contain amido and polysaccharide material, and the operation that structure is fibre network Zhuan，Dui waste water treatment plant has proposed challenge, affects the water quality of the effluent that enters environment.Because these materials are mainly the solubility microbial products of high molecular, people call these organic colloidal matters in biochemical treatment waste water " biogenic organic nano material " (biogenic organic nanoscale material, BONM).BONM is rich in organonitrogen, affects the loads of nutrition in environment, and can react with disinfecting substance in water the by product generating people and ecosystem health worry.In addition, BONM is also the principal pollutant of wastewater membrane separating treatment, and because its very large surface-area can promote the transmission of solvability organic pollutant in waste water.Therefore, from wastewater biochemical is processed water outlet, remove BONM, for waste water treatment plant's controlling diaphragm, pollute and the release tool of organonitrogen is of great significance.Yet the practical technique report of removing BONM at present from waste water is rare.Adopting the BONM in active carbon material absorption waste water may be a kind of effective means, but this method relates to the regeneration problem of useless activated carbon, causes processing costs higher.The present invention is on the basis of experimental study, a kind of electrochemical oxidation method of efficiently removing BONM from waste water has been proposed, by regulating electrolyte concentration and the current density in waste water, can realize easily the control to its process, the electrochemical reactor using is easy to Design enlargement.
Summary of the invention
The object of the present invention is to provide a kind of wastewater biochemical to process the electrochemical oxidation removal method of biogenic organic nano material in water outlet, reduce it to the pollution that in wastewater membrane sepn process, mould material causes, reduce membrane sepn process resistance, improve membrane sepn flux.
The present invention is achieved by the following technical solutions:
The electrochemical oxidation removal method that wastewater biochemical is processed biogenic organic nano material in water outlet comprises following concrete technology step: it is object that the wastewater biochemical of 1) take is processed water outlet, adopts national standard analytical procedure, measures chlorine ion concentration wherein; 2) according to wastewater biochemical, process chlorine ion concentration in water outlet, with industrial NaCl, as ionogen, the chlorine ion concentration that wastewater biochemical is processed in water outlet is adjusted to 4000-6000 mg/L, preferably 4000-5000mg/L; 3) this wastewater biochemical being processed to water outlet puts in waste water storage tank, again it is input to infusion pump in the electrochemical reactor of a continuous flow and carries out electrochemicial oxidation, wherein said electrochemical reactor be take and analysed chloride electrode as anode, take stainless steel plate as negative electrode; 4) controlling the current density of above-mentioned electrochemical reactor on pole plates used is 30～60 mA/cm
2, and controlling wastewater biochemical, to process the flow velocity that water outlet flows through between pole plate be 2～5cm/s; 5) through the water outlet of electrochemicial oxidation, drawn and get back in waste water storage tank, process water outlet after mixing with the wastewater biochemical in waste water storage tank, constantly flow through again electrochemical reactor and waste water storage tank, form the electrochemicial oxidation process circulating; 6) observe the variation of waste water color in storage tank, when its colourity obviously disappears, finish above-mentioned electrochemicial oxidation process; 7) with infusion pump by the wastewater biochemical through after above-mentioned electrochemicial oxidation process water outlet be transported in the clarifying chamber of special setting, carry out settlement separate, the supernatant liquor of clarifying chamber is the wastewater biochemical processing water outlet that removes biogenic organic nano material, and this wastewater biochemical is processed water outlet can require carry out later use or membrane separation according to correlation technique.
Wherein, during above-mentioned electrochemicial oxidation time >=10 minute, in storage tank, wastewater biochemical is processed effluent color dilution and is disappeared, and the electrochemicial oxidation time is preferably 15-20 minute, can obtain good electrochemicial oxidation effect.
The present invention's electrochemical reactor used be take and analysed chloride electrode as anode, preferably investigation of titanium anode coated with metal oxide, more preferably titanium base ruthenium oxide-iridium oxide coated electrode (Ti/RuO2-IrO2), stainless steel plate is negative electrode, preferred 304 type stainless steel plates, polar plate spacing is 5-20mm, preferably 5-10mm.
The titanium base ruthenium oxide-iridium oxide coated electrode (Ti/RuO that has higher electrocatalysis characteristic and high stability that the present invention adopts
2-IrO
2) for analysing chlorine anode, electrolytic oxidation is processed wastewater biochemical and processed water outlet, and when electrolysis, to add NaCl be ionogen, by DC Electric Field, directly chlorion is converted into reactive chlorine Cl
2/ HClO, strengthens oxygenizement, and the most of biogenic organic nano material in wastewater biochemical processing water outlet and the organonitrogen carrying thereof are removed rapidly and thoroughly.In this process, related principal reaction is as follows:
Anodic reaction:
2Cl
-?→Cl
2?+?2e
-
The reaction of body in mutually:
Cl
2?+?H
2O?→HClO?+?H
+?+?Cl
-
HClO?→H
+?+?ClO
-
ClO
-+ BONM → Oxidized products (the oxidized destruction of BONM is removed)
Cathodic reaction:
2H
2O?+?2e
-?→2OH
-?+?H
2
ClO
-?+?H
2O?+2e
-?→Cl
-?+?2OH
-
For guaranteeing ClO
-effective generation and utilization, the pH of electrochemical oxidation reactions system should be controlled at weakly alkaline, pH=7-9.
Positively effect of the present invention is: the described method of utilizing electrochemical oxidation process to remove biogenic organic nano material in wastewater biochemical processing water outlet can be removed the most of biogenic organic nano material in wastewater biochemical processing water outlet and the organonitrogen carrying thereof, thereby significantly alleviate the pollution to mould material in wastewater membrane sepn process of biogenic organic nano material, reduce membrane sepn process resistance, improve membrane sepn flux; Technical process of the present invention is simple, and facility investment is few, and operation is controlled easily, is easy to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 wastewater biochemical is processed water outlet electrochemicial oxidation device connection diagram;
Fig. 2 wastewater biochemical is processed water outlet electrochemical treatment front and back 0.22 μ m membrane separating property result comparison diagram.
Fig. 3 wastewater biochemical is processed water outlet electrochemical treatment different time front and back 0.22 μ m membrane separating property result comparison diagram.
Embodiment
In conjunction with above-mentioned principle and method, illustrate as follows:
The rubbish leachate that the biochemical process of garbage incinerating power plant is processed (being that wastewater biochemical is processed water outlet) adopts national standard analytical procedure, and the main water-quality guideline recording before processing is: COD (chemical oxygen demand (COD)) 739.70 mg/L; Cl
-4143.73 mg/L; NH
3-N 20 mg/L; Bicarbonate alkalinity (CaO meter) 1156.65 mg/L; Suspended substance (SS, suspended solid) 145 mg/L; Total residue 13776 mg/L; PH 8.35.
Get above-mentioned wastewater biochemical and process water outlet 2L, because its chlorine ion concentration is within the scope of 4000-6000mg/L, therefore do not need as ionogen, its chlorine ion concentration to be adjusted to 4000-6000 mg/L with industrial NaCl.Put it in the cylinder shape intermediate storage tank 4 of internal diameter 90 mm, high 450 mm.With infusion pump, wastewater biochemical being processed to water outlet is input in a single pass plate and frame electrolyzer 1.The structure of this plate and frame electrolyzer 1 is: plate is of a size of 250 * 240 * 15 mm, the outside dimension of frame is 200 * 190 * 10 mm, frame interior dimensions is 180 * 170 * 10 mm, in frame, there is the water distribution board of thick 7.7 mm at 10 mm places, distance top and the bottom, the aperture that on water distribution board is 3 row's marshallings is the runner of 3 mm, battery lead plate is sandwiched between plate and frame and forms runner, and polar plate spacing is 10 mm.Reactor adopts titanium base ruthenium oxide-iridium oxide coated electrode (Ti/RuO
2-IrO
2) for analysing chlorine anode, this electrode is directly ordered from existing manufacturers, commercially available 304 type stainless steel plates are negative electrode, with D.C. regulated power supply 2(KXN-6050D, and Shenzhen Zhao Xin electronic equipment factory) as reactor power supply.Reactor rising pipe imports under intermediate storage tank 4 liquid levels, process is controlled liquid circulation flow by water valve, and by a water transfer pump 3(55 W, HQB-2500, ZheJiang Sunsun Industrial Co., Ltd.) realize wastewater biochemical and process the circulation of water outlet between plate and frame electrolyzer 1 and intermediate storage tank 4.Whole electrochemicial oxidation device connection diagram as shown in Figure 1.The electrochemicial oxidation process that wastewater biochemical is processed water outlet adopts continuous current operator scheme, and current density is controlled to 52.28 mA/cm
2, wastewater biochemical is processed the flow rate control of water outlet between battery lead plate at 2 cm/s.When the electrochemicial oxidation time reaches 10 minutes, find that wastewater biochemical after electrochemicial oxidation processes water outlet color and by the reddish yellow before processing, become colorless, sample standingly, observe it and become limpid, finish electrochemicial oxidation process.Then, wastewater biochemical after this electrochemicial oxidation is processed to water outlet and put in Yi Ge clarifying chamber standing clarified separation 24 hours, observe supernatant liquor limpid colourless, this supernatant liquor is that the wastewater biochemical that removes biogenic organic nano material is processed water outlet.
After electrochemicial oxidation, in order to check wastewater biochemical, process the situation that removes of biogenic colloidalmaterial in water outlet, employing aperture is that the millipore filtration of 0.22 μ m is investigated its strainability, and process the membrane separating property comparison of water outlet with wastewater biochemical without electrochemicial oxidation, its result as shown in Figure 2, wherein curve b is 0.22 μ m membrane separating property result after wastewater biochemical processing water outlet electrochemical treatment, and curve a is that wastewater biochemical is processed the front 0.22 μ m membrane separating property result of water outlet electrochemical treatment.Hence one can see that, and when filtrate volume is 250 mL, the membrane sepn time that wastewater biochemical after electrochemicial oxidation is processed water outlet be only approximately 10 minutes, and for the membrane sepn time of the wastewater biochemical processing water outlet without electrochemicial oxidation be approximately 50 minutes.Investigate its membrane separating property, difference is just larger backward again.This explanation wastewater biochemical is processed water outlet after this electrochemicial oxidation, its contained biogenic organic nano material major part is eliminated, thereby greatly improved its membrane separating property, can obviously reduce wastewater biochemical and process the pollution to film in membrane sepn process of water outlet contained biogenic organic nano material, improve membrane separation technique at the effect of field of waste water treatment.
Embodiment 2
Getting landfill leachate bio-chemical effluent is that wastewater biochemical is processed water outlet, adopts national standard analytical procedure, records its main water-quality guideline and is about: COD 800 mg/L; Cl
-2100 mg/L; NH
3-N 30 mg/L; PH 8.5.
Get this wastewater biochemical and process water outlet 5L, with industrial NaCl, its chlorine ion concentration is adjusted to 6000 mg/L, then put it in the rectangle intermediate storage tank 4 that a volume is 7 L.With water transfer pump 3(55 W, HQB-2500, ZheJiang Sunsun Industrial Co., Ltd.) wastewater biochemical is processed in the box electrochemical reactor 1 that water outlet is input to the four-way that an electrode pole span is 5 mm.The structure of this box electrochemical reactor 1 is: main body is a rectangle cell body that is of a size of 180 * 170 * 25 mm, inner in the both sides along 25 mm width vertically upward and to have abreast 5 spacing with two sides be the wide battery lead plate slot of 1 mm of 5 mm, from the slot at edge, start the mode electrode insertion plate replacing according to negative electrode, anode, polar plate spacing is 5 mm like this.This reactor adopts commercially available chloride electrode-titanium base ruthenium oxide-iridium oxide coated electrode (Ti/RuO that analyses
2-IrO
2) as anode, commercially available 304 stainless steel plates are negative electrode, with D.C. regulated power supply 2(KXN-6050D, Shenzhen Zhao Xin electronic equipment factory) as reactor power supply.Reactor rising pipe imports under rectangle intermediate storage tank 4 liquid levels, and process is controlled liquid circulation flow by water valve, and by above-mentioned water transfer pump 3, realizes wastewater biochemical and process water outlet in the box electrochemical reactor 1 of four-way and the circulation between rectangle intermediate storage tank 4.Whole electrochemicial oxidation device connection diagram as shown in Figure 1.The electrochemicial oxidation process that wastewater biochemical is processed water outlet adopts continuous current operator scheme, and current density is controlled to 32.5 mA/cm
2, wastewater biochemical is processed the flow rate control of water outlet between battery lead plate at 5.0 cm/s.Electrochemicial oxidation by this wastewater biochemical processing water outlet through 20 minutes, in this electrochemicial oxidation process, at setting-up time point, 5, within 10,15,20 minutes, sample respectively 400 mL, wherein, when this wastewater biochemical is processed water outlet through the electrochemicial oxidation of 10 minutes, colourity obviously disappears, standing 24 h of various kinds.Then adopting aperture is that the millipore filtration of 0.22 μ m is investigated its strainability, and process the membrane separating property comparison of water outlet with wastewater biochemical without electrochemicial oxidation, its result as shown in Figure 3, is wherein processed result corresponding to water outlet through the wastewater biochemical of 15 and 20 minutes electrochemicial oxidations consistent.Hence one can see that, the wastewater biochemical adopting in the present embodiment is processed water outlet, after the process electrochemicial oxidation of different time, process the membrane sepn situation of water outlet compares with the wastewater biochemical without electrochemicial oxidation, its membrane filtration characteristic improves greatly, and with electrochemicial oxidation time lengthening, it is just better that corresponding wastewater biochemical is processed the membrane separating property of water outlet.This explanation wastewater biochemical is processed water outlet after this electrochemicial oxidation, its contained biogenic organic nano material major part is eliminated, thereby greatly improved its membrane separating property, can obviously reduce wastewater biochemical and process the pollution to film in membrane sepn process of water outlet contained biogenic organic nano material, improve membrane separation technique at the effect of field of waste water treatment.
Claims (6)
1. wastewater biochemical is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, it is characterized in that, comprises following processing step:
1) measure the chlorine ion concentration that wastewater biochemical is processed water outlet;
2) according to wastewater biochemical, process chlorine ion concentration in water outlet, with industrial NaCl, as ionogen, the chlorine ion concentration that regulates wastewater biochemical to process in water outlet is 4000-6000mg/L;
3) this wastewater biochemical is processed to water outlet and put into waste water storage tank, with infusion pump, will in the electrochemical reactor of the continuous flow of wastewater biochemical processing water outlet input in waste water storage tank, carry out electrochemicial oxidation, wherein said electrochemical reactor be take and analysed chloride electrode as anode, take stainless steel plate as negative electrode;
4) controlling the current density of above-mentioned electrochemical reactor on pole plates used is 30～60 mA/cm
2, and controlling wastewater biochemical, to process the flow velocity that water outlet flows through between pole plate be 2～5cm/s;
5) through the wastewater biochemical of electrochemicial oxidation, processing water outlet is drawn back in waste water storage tank, process water outlet after mixing with the wastewater biochemical in waste water storage tank, constantly flow through again electrochemical reactor and waste water storage tank, form the electrochemicial oxidation process circulating;
6) observe the variation of waste water color in storage tank, when its colourity obviously disappears, finish above-mentioned electrochemicial oxidation process;
7) with infusion pump, the wastewater biochemical through after above-mentioned electrochemicial oxidation is processed to water outlet and be transported to and in the clarifying chamber of special setting, carry out settlement separately, the supernatant liquor of clarifying chamber is the wastewater biochemical that removes biogenic organic nano material and processes water outlet;
The described chlorine anode of analysing is titanium base ruthenium oxide-iridium oxide coated electrode (Ti/RuO
2-IrO
2), polar plate spacing is 5～20 mm; Electrochemicial oxidation time>=10 minute.
2. wastewater biochemical as claimed in claim 1 is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, and wherein, described negative electrode is 304 type stainless steel plates.
3. wastewater biochemical as claimed in claim 2 is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, and wherein, polar plate spacing is 5～10 mm.
4. wastewater biochemical as claimed in claim 3 is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, and wherein, the time of electrochemicial oxidation is 15-20 minute.
5. the wastewater biochemical as described in one of claim 1-3 is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, wherein, with industrial NaCl, as ionogen, the chlorine ion concentration that regulates wastewater biochemical to process in water outlet is 4000-5000mg/L.
6. the wastewater biochemical as described in one of claim 1-3 is processed the electrochemical oxidation removal method of biogenic organic nano material in water outlet, wherein, the wastewater biochemical that removes biogenic organic nano material is processed to water outlet and carry out later use or membrane separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210341735.1A CN102795695B (en) | 2012-09-14 | 2012-09-14 | Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210341735.1A CN102795695B (en) | 2012-09-14 | 2012-09-14 | Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102795695A CN102795695A (en) | 2012-11-28 |
| CN102795695B true CN102795695B (en) | 2014-02-12 |
Family
ID=47195041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210341735.1A Active CN102795695B (en) | 2012-09-14 | 2012-09-14 | Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102795695B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809650A (en) * | 2019-03-29 | 2019-05-28 | 江苏京源环保股份有限公司 | A kind of cyanide wastewater electrocatalytic oxidation processing method and system |
| CN113479976A (en) * | 2021-07-27 | 2021-10-08 | 南京理工大学 | Integrated wastewater treatment device and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6474873B1 (en) * | 2001-04-26 | 2002-11-05 | Spicer Technology, Inc. | Adjustable preload shim for tapered bearings |
| CN2804072Y (en) * | 2005-04-30 | 2006-08-09 | 吴金炉 | Appts for treating hard deg radation and high thickness organic waste water by electrooxidizing and biochemical process |
| JP2006346540A (en) * | 2005-06-14 | 2006-12-28 | Ebara Corp | Method and apparatus for treating waste water |
| CN101955280A (en) * | 2010-08-13 | 2011-01-26 | 南京赛佳环保实业有限公司 | Technology for processing high-concentration organic wastewater in composite electrochemical method |
-
2012
- 2012-09-14 CN CN201210341735.1A patent/CN102795695B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6474873B1 (en) * | 2001-04-26 | 2002-11-05 | Spicer Technology, Inc. | Adjustable preload shim for tapered bearings |
| CN2804072Y (en) * | 2005-04-30 | 2006-08-09 | 吴金炉 | Appts for treating hard deg radation and high thickness organic waste water by electrooxidizing and biochemical process |
| JP2006346540A (en) * | 2005-06-14 | 2006-12-28 | Ebara Corp | Method and apparatus for treating waste water |
| CN101955280A (en) * | 2010-08-13 | 2011-01-26 | 南京赛佳环保实业有限公司 | Technology for processing high-concentration organic wastewater in composite electrochemical method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006346540A 2006.12.28 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102795695A (en) | 2012-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhang et al. | Continuous ammonia recovery from wastewaters using an integrated capacitive flow electrode membrane stripping system | |
| Tian et al. | In-situ integration of microbial fuel cell with hollow-fiber membrane bioreactor for wastewater treatment and membrane fouling mitigation | |
| Gajda et al. | Microbial fuel cell–A novel self-powered wastewater electrolyser for electrocoagulation of heavy metals | |
| CN102424494B (en) | Method for treating garbage leachate by multistage electrolysis | |
| CN206142964U (en) | Integration high concentration sewage advanced oxidation treatment equipment | |
| CN103145223A (en) | Electrochemical reactor | |
| CN101506105A (en) | Method and integral system for treating water for cooling towers and processess requiring removal of silica from the water | |
| CN107032537A (en) | A kind of processing method of refuse leachate nanofiltration concentrated water | |
| Sharma et al. | Optimization of EC parameters using Fe and Al electrodes for hydrogen production and wastewater treatment | |
| CN107522267A (en) | A kind of multistage out-phase three-dimensional electrochemical reaction unit for waste water treatment | |
| JP2015091572A (en) | Biogas producing system and method of producing biogas and carbon dioxide reduced product using biogas producing system | |
| CN105731604A (en) | Advanced treatment method for electroplating wastewater | |
| CN108840406A (en) | Electrolysis reactor and trade effluent electrolysis pretreatment system | |
| Muster et al. | Electrochemically-assisted ammonia recovery from wastewater using a floating electrode | |
| CN101723532B (en) | System for treating concentrated water produced by coking wastewater recycling process | |
| CN102795695B (en) | Electrochemical oxidation method for removing biological-source organic nano-matters in biochemical wastewater treatment yielding water | |
| Ba et al. | Anode boundary layer extraction strategy for H+–OH–separation in undivided electrolytic cell: modeling, electrochemical analysis, and water softening application | |
| Ma et al. | Electrochemical membrane bioreactors for sustainable wastewater treatment: principles and challenges | |
| CN103754995A (en) | Three-electrode coupling treatment device for nonbiodegradable wastewater treatment | |
| CN105565610A (en) | Industrial wastewater deep treatment process | |
| CN102674506B (en) | Metal carbon tube component for purifying wastewater and electrocatalytic oxidation device | |
| CN103755099B (en) | Multidimensional poleless electro-oxidation wastewater treatment method | |
| CN205473191U (en) | Domestic waste filtration liquid sewage treatment system | |
| CN101863534A (en) | Advanced treatment method for Dioscoreazingiberensis C.H.Wright wastewater | |
| CN105060656B (en) | Biochemical system auxiliary device and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |