CN106809992A - A kind of high-efficiency sewage processing method - Google Patents

A kind of high-efficiency sewage processing method Download PDF

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Publication number
CN106809992A
CN106809992A CN201510845668.0A CN201510845668A CN106809992A CN 106809992 A CN106809992 A CN 106809992A CN 201510845668 A CN201510845668 A CN 201510845668A CN 106809992 A CN106809992 A CN 106809992A
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water
sewage
electric flocculation
ultrafiltration
regulating reservoir
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CN201510845668.0A
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周子童
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周子童
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Priority to CN201510845668.0A priority Critical patent/CN106809992A/en
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Abstract

The present invention discloses a kind of high-efficiency sewage processing method, belong to technical field of sewage, after sewage is well mixed after collection into regulating reservoir, electric flocculation is carried out into electric flocculation pond, water body after electric flocculation is by sedimentation basin, the sludge precipitated in sedimentation basin enters in plate compression system, sedimentation basin supernatant enters immersion ultrafiltration pond, ultrafiltration concentrated water returns to regulating reservoir, ultrafiltration is produced water and is entered in counter-infiltration system, and reverse osmosis concentrated water section returns to regulating reservoir, the outer row in part, reverse osmosis produced water meets reuse standard, reuse production.Present invention process is that electric flocculation technique is combined with membrane separation technique, reaches the purpose for improving producing water water quality and catching reusing sewage rate high.

Description

A kind of high-efficiency sewage processing method
1 , technical field
The present invention discloses a kind of sewage treatment process, belongs to technical field of sewage, and efficient sewage treatment process is combined with membrane separation technique more particularly, to electric flocculation technique.
2 , background technology
At present, shortage of fresh water, pollution of waterhead aggravation are one of overall situation problems of the world five, so water source purifying and waste water control are always the important topic of various countries' concern and research.Membrane separation technique as it is a kind of efficiently, the technology of energy-saving and environmental protection, by feat of energy consumption it is low, separative efficiency is high, non-secondary pollution, process is simple the advantages of.Membrane separation technique is widely used in Industrial Waste Water Treatments and reuse, but membrane separation technique is a physically separate eventually, simply by the process of sewage concentration, the water-dialyzing processed by membrane separation technique disclosure satisfy that production reuse, but pollutant is all gathered in concentrated water end, concentration of wastewater is greatly improved, and biodegradability is poor, increases the difficulty for the treatment of;Simultaneously with the raising of concentrated water end concentration, fouling membrane aggravation result in that reusing sewage rate is relatively low, govern developing rapidly for membrane separation technique.
Based on electrochemistry, the concern of the electric flocculation technique extremely people of addition chemical agent is not required to, is just progressively applied to the treatment of the various industrial sewages such as plating, chemical industry, printing and dyeing, pharmacy, papermaking.Electric flocculation is to lean on the transmission of electric current and make substrate that redox reaction occur so as to the method for reaching degraded.It uses soluble anode (Al or Fe), and the cations such as Al3+, Fe2+, Fe3+ are generated on anode, while separating out 0 on anode, microbubble produces microbubble on cloudy plate.The mechanism of action of electric flocculation includes electrolysis-coagulation, electrofloatation and electrolysis oxidation-reduction.Electrolysis-coagulation refers to that the cation that soluble anode is produced passes through hydrolysis, polymerization, a series of multinuclear hydroxyl complex ions and hydroxide can be produced, these materials can carry out complexing flocculation as flocculant to polymer, pollution suspension in water, and it is removed from water.Electrofloatation refers to that water produces a small amount of 0 in electrolysis.With Ho microbubbles, the particle diameter and density of these bubbles be all very small, with certain adsorption capacity and floating loading capability, can adsorb the pollutant flocculation group that is produced in water and float to the water surface, so as to reach the effect of separation of solid and liquid.
Electrolysis oxidation-reduction includes two parts, one is that pollutant directly occurs redox reaction in male or female, two is that the oxidisability such as the .OH free radicals of generation in electrolytic process are extremely strong, organic pollution reaction in direct and waste water without selection, it is degraded to carbon dioxide, water and simple organic matter, and the Fe21- that anode is produced has some of stronger reproducibility, reducible degrading waste water oxidizing component.Be applied to above-mentioned electric flocculation technique in UF membrane wastewater treatment process by studying for a long period of time and test by the present inventor, the problems such as can to a certain extent solve concentrated water end concentration of wastewater after UF membrane high and poor biodegradability, therefore just has proposition of the invention.
3 , the content of the invention
For the defect of membrane separation technique in existing sewage disposal, electric flocculation technique is combined with membrane separation technique, designs a kind of efficient sewage treatment process, to reach the purpose for improving producing water water quality and improving reusing sewage rate.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions:
A kind of high-efficiency sewage processing method, it is characterised in that comprise the following steps:
(1)Sewage is well mixed into regulating reservoir after collection, reaches homogeneous and measures, and mitigates the impact load of subsequent treatment facility;
(2)Well mixed sewage carries out electric flocculation;
(3)Water body after electric flocculation enters submerged ultrafiltration component filters, and ultrafiltration concentrated water returns to regulating reservoir, and ultrafiltration is produced water and entered in counter-infiltration system, and reverse osmosis concentrated water section returns to regulating reservoir, and the outer row in part, reverse osmosis produced water meets reuse standard and reuse production.
Described is that electric flocculation is carried out in electric flocculation pond through overregulating uniform sewage, DC voltage is exported by power supply, loop is constituted with electrode group, electric flocculation reaction is carried out, while electrolysis, magnetic stirring apparatus is stirred to the water sample in reactor, described power supply uses the pulse power, the mutation pulse period is 5-15s, and current density is respectively 40-60A/mz, and hydraulic detention time is 30-40min.
The electric flocculation pond 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 electric flocculation is carried out in sedimentation basin, the sedimentation basin for being used is swash plate or tube settler, a small amount of flocculant poly aluminium chloride (PAC) or polyacrylamide (PAM) can be added in it, flocculation sediment is carried out.
The membrane material of described submerged ultrafiltration component can be PVDF, PES, PAN, PS or PAC, immersion ultrafiltration module cleaning way uses recoil+Chemical cleaning mode, recoil time is every 10min, backwash is once, each washing time is 30s, the Chemical cleaning time is monthly, to prevent fouling membrane, improve membrane flux.
The present invention is that electric flocculation technique is combined with membrane separation technique, has following advantage by the sewage of this PROCESS FOR TREATMENT:
L, reverse osmosis produced water water quality are good, direct reuse production;
2nd, concentrated water returns to electric flocculation, and circular treatment improves the rate of recovery;
3rd, whole sewage disposal process reduces processing cost without chemicals, and sludge output is few;
4th, using the pulse power, pulse signal is applied, the reaction on electrode off and on, is conducive to diffusion, concentration polarization is reduced, so that reducing energy consumption.And when electrolytic cell applies ac signal, because the two poles of the earth are solvable, cation can be produced from the two poles of the earth, it is more beneficial for the effect between metal ion and colloid.Simultaneously because the two poles of the earth polarity often changes, to preventing electrode passivation from serving positive effect.
5th, the equipment that present invention process coordinates, without personal management, reduces operating cost by PLC Automated condtrols.
4、 Specific embodiment
This area engineers and technicians' technology according to the present invention scheme and above-mentioned design Main points, enterprise's technique waste water purification treatment can be applied the present invention to.
Embodiment
Sewage source is certain waste water in pharmaceutical plants, water-quality COD 4000-5000mg/L, BOD1500-2000mg/L.After sewage is well mixed after collection into regulating reservoir, electric flocculation is carried out into electric flocculation pond, by sedimentation basin, the sludge precipitated in sedimentation basin enters in plate compression system 4 water body after electric flocculation, and sedimentation basin supernatant enters immersion ultrafiltration pond, ultrafiltration concentrated water returns to regulating reservoir, ultrafiltration is produced water and is entered in counter-infiltration system, and reverse osmosis concentrated water section returns to regulating reservoir, the outer row in part, reverse osmosis produced water meets reuse standard, reuse production.Wherein electric flocculation device power supply (DPS) uses the pulse power, and the mutation pulse period is 20s, and current density is respectively 60A/rri2, 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, and membrane material composite membrane, operating pressure is 18bar, 25-30 DEG C of temperature.After dyeing waste water enters collecting pit, into electric flocculation pond, water outlet COD300mg/L, BOD 80mg/L after electric flocculation meets industrial water water quality requirement, reuse production.

Claims (5)

1. a kind of high-efficiency sewage processing method, it is characterised in that comprise the following steps:
(1)Sewage is well mixed into regulating reservoir after collection, reaches homogeneous and measures, and mitigates the impact load of subsequent treatment facility;
(2)Well mixed sewage carries out electric flocculation;
(3)Water body after electric flocculation enters submerged ultrafiltration component filters, and ultrafiltration concentrated water returns to regulating reservoir, and ultrafiltration is produced water and entered in counter-infiltration system, and reverse osmosis concentrated water section returns to regulating reservoir, and the outer row in part, reverse osmosis produced water meets reuse standard and reuse production.
2. a kind of high-efficiency sewage processing method according to claim l, it is characterised in that:Described is that electric flocculation is carried out in electric flocculation pond through overregulating uniform sewage, DC voltage is exported by power supply, loop is constituted with electrode group, electric flocculation reaction is carried out, while electrolysis, magnetic stirring apparatus is stirred to the water sample in reactor, described power supply uses the pulse power, the mutation pulse period is 5-15s, and current density is respectively 40-60A/mz, and hydraulic detention time is 30-40min.
3. a kind of high-efficiency sewage processing method according to claim l, it is characterised in that:The electric flocculation pond 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 characterised in that:Described sludge settling is that the sewage after electric flocculation is carried out in sedimentation basin, the sedimentation basin for being used is swash plate or tube settler, a small amount of flocculant poly aluminium chloride (PAC) or polyacrylamide (PAM) can be added in it, flocculation sediment is carried out.
5. a kind of sewage treatment process according to claim l, it is characterised in that:The membrane material of described submerged ultrafiltration component can be PVDF, PES, PAN, PS or PAC, immersion ultrafiltration module cleaning way uses recoil+Chemical cleaning mode, recoil time is every 10min, backwash is once, each washing time is 30s, the Chemical cleaning time is monthly, to prevent fouling membrane, improve membrane flux.
CN201510845668.0A 2015-11-30 2015-11-30 A kind of high-efficiency sewage processing method Pending CN106809992A (en)

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Application Number Priority Date Filing Date Title
CN201510845668.0A CN106809992A (en) 2015-11-30 2015-11-30 A kind of high-efficiency sewage processing method

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CN106809992A true CN106809992A (en) 2017-06-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109437451A (en) * 2018-11-30 2019-03-08 广东省工程技术研究所 It is a kind of for oil-containing and surface active agent wastewater can reuse equipment and technique
CN109928555A (en) * 2019-04-22 2019-06-25 湖南大学 A kind of multiduty electrochemistry/nanofiltration circulating water treatment device and application

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109437451A (en) * 2018-11-30 2019-03-08 广东省工程技术研究所 It is a kind of for oil-containing and surface active agent wastewater can reuse equipment and technique
CN109928555A (en) * 2019-04-22 2019-06-25 湖南大学 A kind of multiduty electrochemistry/nanofiltration circulating water treatment device and application

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Application publication date: 20170609

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