CN105502754A - High efficiency sewage treatment method - Google Patents
High efficiency sewage treatment method Download PDFInfo
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- CN105502754A CN105502754A CN201410497439.XA CN201410497439A CN105502754A CN 105502754 A CN105502754 A CN 105502754A CN 201410497439 A CN201410497439 A CN 201410497439A CN 105502754 A CN105502754 A CN 105502754A
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Abstract
Belonging to the technical field of sewage treatment, the invention discloses a high efficiency sewage treatment method. The method includes: collecting sewage, then letting the sewage enter an adjustment tank and mixing the sewage evenly, then subjecting the sewage to electric flocculation in an electric flocculation tank, letting the water from electric flocculation pass through a sedimentation tank, making the sludge settling in the sedimentation tank enter a plate-frame pressure filtration system, letting the supernatant of the sedimentation tank enter an immersed ultrafiltration tank, returning the ultrafiltered concentrate water into an adjustment tank, making the ultrafiltration produced water enter a reverse osmosis system, returning part of reverse osmosis concentrate water to the adjustment tank, and discharging part of the reverse osmosis concentrate water to the outside, and reusing the reverse osmosis produced water in line with the reuse standards in production. The method provided by the invention combines electric flocculation technology with membrane separation technology, and reaches the purposes of improving the produced water quality and enhancing the sewage reuse rate.
Description
Technical field
The present invention discloses a kind of sewage treatment process, belongs to technical field of sewage, especially relates to electric flocculation technique and to combine with membrane separation technique efficient sewage treatment process.
Background technology
At present, shortage of fresh water, pollution of waterhead aggravation are one of the world five overall situation problems, so water source purifying and waste water control are the important topics that various countries pay close attention to and study always.Membrane separation technique as a kind of technology of efficient, energy-saving and environmental protection, the advantage such as low by feat of energy consumption, separation efficiency is high, non-secondary pollution, technique are simple.Membrane separation technique is widely used in Industrial Waste Water Treatments and reuse, but membrane separation technique is physical sepn eventually, just by the process of sewage concentration, water-dialyzing through membrane separation technique process can meet production reuse, but pollutent is all gathered in dense water end (W.E.), concentration of wastewater improves greatly, and biodegradability is poor, increases the difficulty of process; Simultaneously along with the raising of dense water end (W.E.) concentration, fouling membrane aggravates, and result in reusing sewage rate on the low side, governs developing rapidly of membrane separation technique.
Based on electrochemistry, do not need the concern of the electric flocculation technique extremely people adding chemical agent, be just progressively applied to the process of the various industrial sewage such as plating, chemical industry, printing and dyeing, pharmacy, papermaking.Electricity flocculation is transmission by electric current and makes substrate generation redox reaction thus reach the method for degraded.It adopts soluble anode (Al or Fe), and anode generates the positively charged ions such as Al3+, Fe2+, Fe3+, and on anode, separate out 0, microbubble, cloudy plate produces microbubble simultaneously.The mechanism of action of electricity flocculation comprises electrolysis-coagulation, electrofloatation and electrolysis oxidation-reduction.Electrolysis-coagulation refers to that the positively charged ion that soluble anode produces passes through hydrolysis, polymerization, a series of multinuclear hydroxyl complexing ion and oxyhydroxide can be produced, these materials can carry out complexing throwing out to polymer, pollution suspended substance in water as flocculation agent, it are removed from water.Electrofloatation refers to that water produces a small amount of 0 when electrolysis.With Ho microbubble, the particle diameter of these bubbles and density are all very little, have certain adsorptive power and floating loading capability, and the pollutent flocculation produced in energy planar water is rolled into a ball and floats to the water surface, thus reaches the effect of solid-liquid separation.
Electrolysis oxidation-reduction comprises two portions, one is that pollutent is directly in male or female generation redox reaction, two is that the oxidisability such as the .OH free radical produced in electrolytic process are extremely strong, react without the organic pollutant directly and in waste water selected, be degraded to carbonic acid gas, water and simple organism, and the Fe21-that anode produces has stronger reductibility, some oxidizing component in reducible degrading waste water.The problems such as above-mentioned electric flocculation technique through studying for a long period of time and test, is applied in membrane sepn wastewater treatment process by the present inventor, and after can solving membrane sepn to a certain extent high the and biodegradability of dense water end (W.E.) concentration of wastewater is poor, therefore just have proposition of the present invention.
Summary of the invention
For the defect of membrane separation technique in existing sewage disposal, combined by electric flocculation technique with membrane separation technique, a kind of sewage treatment process efficiently of design, to reach the object put forward high yield water water quality and improve reusing sewage rate.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of high-efficiency sewage treatment process, is characterized in that comprising the steps:
(1) sewage enters equalizing tank and mixes after collecting, and reaches homogeneous and all measures, alleviate the impact load of subsequent disposal facility;
(2) sewage mixed carries out electricity flocculation;
(3) water body after electricity flocculation enters submerged ultrafiltration component filters, and the dense water of ultrafiltration returns equalizing tank, and ultrafiltration is produced water and entered in reverse osmosis system, and reverse osmosis concentrated water section returns equalizing tank, the outer row of part, and reverse osmosis produced water meets reuse standard and reuse is produced.
Described is in electric flocculation basin, carry out electricity flocculation through overregulating uniform sewage, volts DS is exported by power supply, loop is formed with electrode group, carry out electric flocculation reaction, while electrolysis, magnetic stirring apparatus stirs the water sample in reactor, the described power acquisition pulse power, the sudden change recurrence interval is 5-15s, and current density is respectively 40-60A/mz, and hydraulic detention time is 30-40min.
The electric flocculation basin water intake mode of institute spouse is continuous flow, and battery lead plate spacing is 4-5cm, and battery lead plate material is iron plate or aluminium sheet.
Described sludge settling is that the sewage after electricity flocculation carries out in settling tank, the settling tank adopted is swash plate or tube settler, a small amount of flocculant poly aluminum chloride (PAC) or polyacrylamide (PAM) can be added in it, carry out flocculation sediment.
The membrane material of described submerged ultrafiltration assembly can be PVDF, PES, PAN, PS or PAC, immersion ultrafiltration module cleaning way adopts recoil+matting mode, the recoil time is every 10min, back flushing once, each flush time is 30s, the matting time is monthly, prevents fouling membrane, improves membrane flux.
Electric flocculation technique combines with membrane separation technique by the present invention, and the sewage through this art breading has following advantage:
L, reverse osmosis produced water water quality are good, and direct reuse is produced;
2, dense water returns electricity flocculation, and circular treatment improves the rate of recovery;
3, whole sewage treatment process does not add pharmaceutical chemicals, reduce processing cost, and sludge output is few;
4, adopt the pulse power, apply pulse signal, the reaction on electrode off and on, is conducive to diffusion, reduces concentration polarization, thus reduces energy consumption.And when electrolyzer applies ac signal, because the two poles of the earth are all solvable, positively charged ion can be produced from the two poles of the earth, more be conducive to the effect between metal ion and colloid.Simultaneously because the two poles of the earth polarity often changes, serve positive effect to preventing electrode passivation.
5, the equipment of present invention process cooperation is by PLC Automated condtrol, without the need to personal management, reduces running cost.
Embodiment
This area engineering technical personnel, according to the main points of technical scheme of the present invention and above-mentioned design, can apply the present invention to enterprise's processing wastewater purification treatment.
Embodiment
Sewage source is certain waste water in pharmaceutical plants, water-quality COD 4000-5000mg/L, BOD1500-2000mg/L.Sewage enters after equalizing tank mixes after collecting, enter electric flocculation basin and carry out electricity flocculation, water body after electricity flocculation is through settling tank, and the mud precipitated in settling tank enters in filter press system 4, and settling tank supernatant liquor enters immersion ultrafiltration pond, the dense water of ultrafiltration returns equalizing tank, ultrafiltration is produced water and is entered in reverse osmosis system, and reverse osmosis concentrated water section returns equalizing tank, the outer row of part, reverse osmosis produced water meets reuse standard, and reuse is produced.The wherein electric flocculation apparatus power acquisition pulse power, the sudden change recurrence interval is 20s, and current density is respectively 60A/rri
2, hydraulic detention time is 25min, and battery lead plate spacing is 3cm, and battery lead plate material is aluminium sheet.Submerged ultrafiltration material is PES, and reverse osmosis membrane is spiral wound, membrane material composite membrane, and working pressure is 18bar, temperature 25-30 DEG C.After dyeing waste water enters collecting tank, enter electric flocculation basin, water outlet COD300mg/L, BOD80mg/L after electricity flocculation, meet water of productive use water quality requirement, and reuse is produced.
Claims (5)
1. a high-efficiency sewage treatment process, is characterized in that comprising the steps:
(1) sewage enters equalizing tank and mixes after collecting, and reaches homogeneous and all measures, alleviate the impact load of subsequent disposal facility;
(2) sewage mixed carries out electricity flocculation;
(3) water body after electricity flocculation enters submerged ultrafiltration component filters, and the dense water of ultrafiltration returns equalizing tank, and ultrafiltration is produced water and entered in reverse osmosis system, and reverse osmosis concentrated water section returns equalizing tank, the outer row of part, and reverse osmosis produced water meets reuse standard and reuse is produced.
2. a kind of high-efficiency sewage treatment process according to claim l, it is characterized in that: described is in electric flocculation basin, carry out electricity flocculation through overregulating uniform sewage, export volts DS by power supply, form loop with electrode group, carry out electric flocculation reaction, while electrolysis, magnetic stirring apparatus stirs the water sample in reactor, the described power acquisition pulse power, and the sudden change recurrence interval is 5-15s, current density is respectively 40-60A/mz, and hydraulic detention time is 30-40min.
3. according to a kind of high-efficiency sewage treatment process described in claim l, it is characterized in that: the electric flocculation basin water intake mode of institute spouse is continuous flow, and battery lead plate spacing is 4-5cm, and battery lead plate material is iron plate or aluminium sheet.
4. a kind of sewage treatment process according to claim 2, it is characterized in that: described sludge settling is that the sewage after electricity flocculation carries out in settling tank, the settling tank adopted is swash plate or tube settler, a small amount of flocculant poly aluminum chloride (PAC) or polyacrylamide (PAM) can be added in it, carry out flocculation sediment.
5. a kind of sewage treatment process according to claim l, it is characterized in that: the membrane material of described submerged ultrafiltration assembly can be PVDF, PES, PAN, PS or PAC, immersion ultrafiltration module cleaning way adopts recoil+matting mode, the recoil time is every 10min, back flushing once, each flush time is 30s, and the matting time is monthly, prevents fouling membrane, improves membrane flux.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410497439.XA CN105502754A (en) | 2014-09-26 | 2014-09-26 | High efficiency sewage treatment method |
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| CN201410497439.XA CN105502754A (en) | 2014-09-26 | 2014-09-26 | High efficiency sewage treatment method |
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| CN105502754A true CN105502754A (en) | 2016-04-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045139A (en) * | 2016-06-17 | 2016-10-26 | 红板（江西）有限公司 | Device and process for composite electrochemical reaction pretreatment and recycling of board surface cleaning water in circuit board industry |
| CN106315939A (en) * | 2016-10-31 | 2017-01-11 | 无锡出新环保设备有限公司 | Electroplating wastewater treatment system and treatment method thereof |
| CN110776164A (en) * | 2019-11-05 | 2020-02-11 | 东北大学 | Rural reclaimed water recycling device based on electric flocculation ultrafiltration technology |
| CN111087052A (en) * | 2019-12-31 | 2020-05-01 | 浙江树人学院（浙江树人大学） | Method for pretreating rice wine slurry and recycling resources |
| CN112723619A (en) * | 2020-12-22 | 2021-04-30 | 贵州鑫立方环保科技有限公司 | High-efficiency industrial sewage treatment method based on electrochemistry and membrane filtration technology |
-
2014
- 2014-09-26 CN CN201410497439.XA patent/CN105502754A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045139A (en) * | 2016-06-17 | 2016-10-26 | 红板（江西）有限公司 | Device and process for composite electrochemical reaction pretreatment and recycling of board surface cleaning water in circuit board industry |
| CN106315939A (en) * | 2016-10-31 | 2017-01-11 | 无锡出新环保设备有限公司 | Electroplating wastewater treatment system and treatment method thereof |
| CN106315939B (en) * | 2016-10-31 | 2019-09-27 | 无锡出新环保设备有限公司 | A kind of electroplating waste water treatment system and its processing method |
| CN110776164A (en) * | 2019-11-05 | 2020-02-11 | 东北大学 | Rural reclaimed water recycling device based on electric flocculation ultrafiltration technology |
| CN110776164B (en) * | 2019-11-05 | 2021-10-08 | 东北大学 | Rural reclaimed water recycling device based on electric flocculation ultrafiltration technology |
| CN111087052A (en) * | 2019-12-31 | 2020-05-01 | 浙江树人学院（浙江树人大学） | Method for pretreating rice wine slurry and recycling resources |
| CN112723619A (en) * | 2020-12-22 | 2021-04-30 | 贵州鑫立方环保科技有限公司 | High-efficiency industrial sewage treatment method based on electrochemistry and membrane filtration technology |
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Application publication date: 20160420 |