CN101792199A - Sewage treatment technique - Google Patents
Sewage treatment technique Download PDFInfo
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- CN101792199A CN101792199A CN 201010117987 CN201010117987A CN101792199A CN 101792199 A CN101792199 A CN 101792199A CN 201010117987 CN201010117987 CN 201010117987 CN 201010117987 A CN201010117987 A CN 201010117987A CN 101792199 A CN101792199 A CN 101792199A
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Abstract
The invention discloses a sewage treatment technique, belonging to the technical field of sewage treatment. The technique comprises the steps of: collecting sewage and leading the sewage to enter an adjusting tank to be evenly mixed; then, leading the mixed sewage to enter into an electric flocculation tank for electric flocculation; after electric flocculation, leading water body to pass through a sedimentation tank, and leading sludge precipitated inside the sedimentation tank to enter into a plate frame filter pressing system; leading supernate of the sedimentation tank to enter into an immersed ultra-filter tank, returning ultra-filter concentrated water into the adjusting tank, and leading the ultra-filter produced water to enter a reverse osmosis system; returning part of reverse osmosis concentrated water into the adjusting tank, and discharging the rest reverse osmosis concentrated water outside; and recycling reverse osmosis produced water which meets the recycling standard. The technique combines the electric flocculation technology and membrane separation technology, thus achieving the aims of improving the quality of the produced water and the recycling rate of the sewage.
Description
Technical field
The present invention discloses a kind of sewage treatment process, belongs to technical field of sewage, especially relates to the electric flocculation technique sewage treatment process efficiently that combines with membrane separation technique.
Background technology
At present, shortage of fresh water, pollution of waterhead aggravation are one of the world's 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.Advantages such as membrane separation technique is as a kind of technology of efficient, energy-saving and environmental protection, and is low by feat of energy consumption, that separation efficiency is high, non-secondary pollution, technology are simple.Membrane separation technique has obtained using widely in industrial sewage processing and reuse, yet membrane separation technique is physical sepn eventually, just with the spissated process of sewage, the dialysis water of handling through membrane separation technique can satisfy the production reuse, but pollutent all accumulates in dense water end (W.E.), concentration of wastewater improves greatly, and biodegradability is poor, increases the difficulty of handling; Along with the raising of dense water end (W.E.) concentration, film pollutes aggravation, has caused the reusing sewage rate on the low side, is restricting developing rapidly of membrane separation technique simultaneously.
Based on electrochemistry, the electric flocculation technique that need not add chemical agent is people's attention extremely, just progressively is applied to electroplate, the processing of various industrial sewage such as chemical industry, printing and dyeing, pharmacy, papermaking.Thereby the electricity flocculation is to make substrate generation redox reaction reach the method for degraded by the transmission of electric current.It adopts soluble anode (Al or Fe), generates Al3 on anode
+, Fe
2+, Fe
3+Deng positively charged ion, on anode, separate out O simultaneously
2Microbubble produces H on negative electrode
2Microbubble.The mechanism of action of electricity flocculation comprises electrolysis-coagulation, electrofloatation and electrolytic oxidation reduction.Electrolysis-coagulation is meant the hydrolysis of positively charged ion process, the polymerization that soluble anode produces, can produce a series of multinuclear hydroxyl complexing ions and oxyhydroxide, these materials can carry out the complexing throwing out to organic polymer material, pollution suspended substance in the water as flocculation agent, and it is removed from water.Electrofloatation is meant that water produces a spot of O when electrolysis
2And H
2Microbubble, the particle diameter and the density of these bubbles are all very little, have certain adsorptive power and floating loading capability, and the pollutent flocculation group that produces in the energy planar water also floats to the water surface, thereby reaches the effect of solid-liquid separation.The electrolytic oxidation reduction comprises two portions, the one, pollutent is directly in male or female generation redox reaction, the 2nd, oxidisability such as the OH free radical that produces in the electrolytic process are extremely strong, there is not the organic pollutant reaction in the direct and waste water of selecting, be degraded to carbonic acid gas, water and simple organism, and the Fe that anode produces
2+Stronger reductibility is arranged, some the oxidisability component in the reducible degrading waste water.The reaction formula of electricity flocculation process (Fe electrode) is as follows:
Anode: Fe-2e → Fe
2+, 2H
2O-4e → O
2+ 4H
+
Negative electrode: 2H
2O+2e → H
2+ 2OH
-
In the solution: Fe
2++ O
2+ H
+→ Fe
3++ HO
2, Fe
2++ HO
2+ H
+→ Fe
3++ H
2O
2,
Fe
2++H
2O
2→Fe
3++HO·+OH
-，Fe
2++HO·→Fe
3++OH
-，
Fe
2++2OH
-→Fe(OH)
2，Fe
3++3OH
-→Fe(OH)
3。
The inventor is applied to above-mentioned electric flocculation technique in the membrane sepn wastewater treatment process through studying for a long period of time and testing, and can solve problem such as dense water end (W.E.) concentration of wastewater height and biodegradability difference behind the membrane sepn to a certain extent, so proposition of the present invention is just arranged.
Summary of the invention
Defective at membrane separation technique in the existing sewage disposal combines electric flocculation technique with membrane separation technique, design a kind of sewage treatment process efficiently, to reach the purpose of putting forward high yield water water quality and improving the reusing sewage rate.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of sewage treatment process comprises the steps:
(1), sewage enters equalizing tank and mixes after collecting, reach homogeneous and all measure, and alleviates the impact load of subsequent disposal facility;
(2), the sewage that mixes carries out the electricity flocculation;
(3), the water body after the electricity flocculation enters the submerged ultrafiltration assembly and filters, the dense water of ultrafiltration returns equalizing tank, ultrafiltration is produced water and is entered in the reverse osmosis system, reverse osmosis concentrated water section returns equalizing tank, part effluxes, reverse osmosis produced water satisfies reuse standard and reuse production.
Sewage after the electricity flocculation in the step (two), enter and carry out sludge settling in the settling tank: the settling tank supernatant liquor enters the submerged ultrafiltration assembly and filters; The mud that precipitates in the settling tank enters in the filter press system, carries out filter press, and the mud outward transport that press filtration is come out is handled, and press filtration water then enters equalizing tank, and circulation is reclaimed again.
Be in electric flocculation basin, to carry out electricity flocculation through overregulating uniform sewage in the step (two), by the power supply output dc voltage, constitute the loop with the electrode group, carry out electric flocculation reaction, the electrolytic while, magnetic stirring apparatus stirs the water sample in the reactor, and described power supply adopts the pulse power, the sudden change recurrence interval is 5-15s, and current density is respectively 30-50A/m
2, hydraulic detention time is 20-30min, the battery lead plate spacing is 3-5cm.The battery lead plate material is iron plate or aluminium sheet, and water intake mode is the water of being back to back.
Described sludge settling is that the sewage after the electricity flocculation carries out in settling tank, and the settling tank that is adopted is swash plate or tube settler, can add small amount of flocculant polymerize aluminum chloride (PAC) or PAM (polyacrylamide) in it, carries out flocculation sediment.
Submerged ultrafiltration assembly described in the step (three) is arranged in the immersion ultrafiltration pond, the submerged ultrafiltration assembly is a tubular fibre formula membrane module, plate and frame module or tubular membrane component, membrane material can be PVDF, PES, PAN, PS, PAC etc., dense water in the immersion ultrafiltration pond passes through return line, be back to equalizing tank, further electricity flocculation, reach the purpose of further removal water pollutant, and improve the sewage rate of recovery, and immersion ultrafiltration module cleaning way adopts recoil+matting mode, and the recoil time is every 5min, back flushing once, each flush time is 30s, the matting time be every month once, prevent that film from polluting, improve membrane flux.
Reverse osmosis system described in the step (three) comprises reverse osmosis membrane, this reverse osmosis membrane is a spiral wound membrane, the membrane material composite membrane, working pressure 10-20bar, temperature 20-35 ℃, reverse osmosis produced water satisfies the reuse requirement, reuse is produced, and reverse osmosis concentrated water section returns equalizing tank, further electricity flocculation, part effluxes, and prevents dense water end (W.E.) monovalence inorganic salt accumulation.
The present invention combines electric flocculation technique with membrane separation technique, the sewage of this art breading of process has following advantage:
1, reverse osmosis produced water water quality is good, direct reuse production;
2, dense water returns the electricity flocculation, and circular treatment improves the rate of recovery;
3, the entire sewage treating processes is not added pharmaceutical chemicals, reduce processing cost, and sludge output is few;
4, adopt the pulse power, apply pulse signal, the reaction on the electrode helps diffusion off and on, reduces concentration polarization, thereby cuts down the consumption of energy.And when electrolyzer applies ac signal,, can produce positively charged ion from the two poles of the earth because the two poles of the earth are all solvable, more help the effect between metal ion and colloid.Because the two poles of the earth polarity often changes, played positive effect simultaneously to preventing electrode passivation.
5, the equipment of technology cooperation of the present invention need not the personal management by PLC automatization control, reduces running cost.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
Embodiment 1: structure as shown in Figure 1, sewage source is certain printing and dyeing enterprise dyeing waste water, water-quality COD is 800 times of 1200mg/L, BOD 300mg/L, colourities.Sewage enters equalizing tank 1 and mixes after collecting after, enter electric flocculation basin 2 and carry out the electricity flocculation, water body after the electricity flocculation is through settling tank 3, and the mud that precipitates in the settling tank 3 enters in the filter press system 4, and settling tank 3 supernatant liquors enter immersion ultrafiltration pond 5, the dense water of ultrafiltration returns equalizing tank 1, ultrafiltration is produced water and is entered in the reverse osmosis system 6, and reverse osmosis concentrated water section returns equalizing tank 1, and part effluxes, reverse osmosis produced water satisfies reuse standard, reuse production.Wherein electric flocculation apparatus power supply adopts the pulse power, and the sudden change recurrence interval is 10s, and current density is respectively 40A/m
2, hydraulic detention time is 20min, and the battery lead plate spacing is 5cm, and the battery lead plate material is an iron plate.The submerged ultrafiltration material is PVDF, and reverse osmosis membrane is a spiral wound, and membrane material composite membrane, working pressure are 15bar, temperature 25-30 ℃.After dyeing waste water enters collecting tank, enter electric flocculation basin, water outlet COD 250mg/L, BOD 40mg/L, colourity 50 after the electricity flocculation, water COD 70mg/L, BOD 20mg/L, colourity 28 are produced in the immersion ultrafiltration, reverse osmosis produced water COD9mg/L, BOD 2mg/L, colourity 4, satisfy printing and dyeing water of productive use water quality requirement, reuse production.
Embodiment 2: sewage source is certain pharmaceutical factory's waste water, water-quality COD 4000-5000mg/L, BOD1500-2000mg/L.Sewage enters equalizing tank 1 and mixes after collecting after, enter electric flocculation basin 2 and carry out the electricity flocculation, water body after the electricity flocculation is through settling tank 3, and the mud that precipitates in the settling tank enters in the filter press system 4, and the settling tank supernatant liquor enters immersion ultrafiltration pond 5, the dense water of ultrafiltration returns equalizing tank 1, ultrafiltration is produced water and is entered in the reverse osmosis system 6, and reverse osmosis concentrated water section returns equalizing tank 1, and part effluxes, reverse osmosis produced water satisfies reuse standard, reuse production.Wherein electric flocculation apparatus power supply adopts the pulse power, and the sudden change recurrence interval is 15s, and current density is respectively 50A/m
2, hydraulic detention time is 25min, and the battery lead plate spacing is 3cm, and the battery lead plate material is an aluminium sheet.The submerged ultrafiltration material is PES, and reverse osmosis membrane is a spiral wound, and membrane material composite membrane, working pressure are 18bar, temperature 25-30 ℃.After dyeing waste water enters collecting tank, enter electric flocculation basin, water outlet COD 300mg/L, BOD 80mg/L after the electricity flocculation, water COD 80mg/L, BOD 20mg/L, reverse osmosis produced water COD 10mg/L, BOD 3mg/L are produced in the immersion ultrafiltration, satisfy the water of productive use water quality requirement, reuse production.
The above record only for utilizing the embodiment of this origination techniques content, anyly is familiar with modification, the variation that this skill person uses this creation to do to do, and all belongs to the claim of this creation opinion, and is not limited to those disclosed embodiments.
Claims (8)
1. a sewage treatment process is characterized in that comprising the steps:
(1), sewage enters equalizing tank and mixes after collecting, reach homogeneous and all measure, and alleviates the impact load of subsequent disposal facility;
(2), the sewage that mixes carries out the electricity flocculation;
(3), the water body after the electricity flocculation enters the submerged ultrafiltration assembly and filters, the dense water of ultrafiltration returns equalizing tank, ultrafiltration is produced water and is entered in the reverse osmosis system, reverse osmosis concentrated water section returns equalizing tank, part effluxes, reverse osmosis produced water satisfies reuse standard and reuse production.
2. a kind of sewage treatment process according to claim 1 is characterized in that: the sewage in the described step (two) after the electricity flocculation enters and carries out sludge settling in the settling tank: the settling tank supernatant liquor enters the submerged ultrafiltration assembly and filters; The mud that precipitates in the settling tank enters in the filter press system, carries out filter press, and the mud outward transport that press filtration is come out is handled, and press filtration water then enters equalizing tank, and circulation is reclaimed again.
3. a kind of sewage treatment process according to claim 1, it is characterized in that: be in electric flocculation basin, to carry out electricity flocculation through overregulating uniform sewage in the described step (two), by the power supply output dc voltage, constitute the loop with the electrode group, carry out electric flocculation reaction, the electrolytic while, magnetic stirring apparatus stirs the water sample in the reactor, described power supply adopts the pulse power, and the sudden change recurrence interval is 5-15s, and current density is respectively 30-50A/m
2, hydraulic detention time is 20-30min.
4. according to claim 1 or 3 described a kind of sewage treatment process, it is characterized in that: described electric flocculation basin water intake mode is the water of being back to back, and the battery lead plate spacing is 3-5cm, and the battery lead plate material is iron plate or aluminium sheet.
5. a kind of sewage treatment process according to claim 2, it is characterized in that: described sludge settling is that the sewage after the electricity flocculation carries out in settling tank, the settling tank that is adopted is swash plate or tube settler, can add small amount of flocculant polymerize aluminum chloride (PAC) or polyacrylamide (PAM) in it, carry out flocculation sediment.
6. a kind of sewage treatment process according to claim 1, it is characterized in that: the submerged ultrafiltration assembly described in the step (three) is arranged in the immersion ultrafiltration pond, the submerged ultrafiltration assembly is tubular fibre formula membrane module, plate and frame module or tubular membrane component, dense water in the immersion ultrafiltration pond passes through return line, be back to equalizing tank, further electricity flocculation reaches the purpose of further removal water pollutant and improves the sewage rate of recovery.
7. according to claim 1 or 6 described a kind of sewage treatment process, 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 5min, back flushing once, each flush time is 30s, the matting time be every month once, prevent that film from polluting, improving membrane flux.
8. a kind of sewage treatment process according to claim 1, it is characterized in that: the reverse osmosis system described in the step (three) comprises reverse osmosis membrane, this reverse osmosis membrane is a spiral wound membrane, and membrane material is a composite membrane, working pressure 10-20bar, temperature 20-35 ℃, reverse osmosis produced water satisfies the reuse requirement, reuse production, and reverse osmosis concentrated water section returns equalizing tank with further electricity flocculation, reverse osmosis concentrated water part in addition effluxes, and prevents dense water end (W.E.) monovalence inorganic salt accumulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010117987 CN101792199A (en) | 2010-02-26 | 2010-02-26 | Sewage treatment technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010117987 CN101792199A (en) | 2010-02-26 | 2010-02-26 | Sewage treatment technique |
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|---|---|
| CN101792199A true CN101792199A (en) | 2010-08-04 |
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|---|---|---|---|
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| CN101948201A (en) * | 2010-09-11 | 2011-01-19 | 山东招金膜天有限责任公司 | Oil extraction sewage olation and recycling combined treating process |
| CN102267774A (en) * | 2011-07-27 | 2011-12-07 | 宝钢工程技术集团有限公司 | Strong brine processing system |
| CN102276094A (en) * | 2011-07-27 | 2011-12-14 | 宝钢工程技术集团有限公司 | Method for treating strong brine |
| CN102381815A (en) * | 2011-09-30 | 2012-03-21 | 江苏春晖乳业有限公司 | Treatment method of milk production wastewater |
| CN102807297A (en) * | 2012-07-31 | 2012-12-05 | 海门市兴农畜牧机械制造有限公司 | All-in-one quick sewage treatment machine |
| CN102976482A (en) * | 2012-12-24 | 2013-03-20 | 东北大学 | Polymembrane bioreactor by in situ electrocoagulation and method for treating wastewater |
| CN103539295A (en) * | 2013-10-30 | 2014-01-29 | 北京清大国华环保科技有限公司 | Method and device for deeply treating heavy metal wastewater |
| CN103570168A (en) * | 2013-11-15 | 2014-02-12 | 苏州巨联科技有限公司 | Modular electroflocculation water treatment device |
| CN103771604A (en) * | 2014-01-23 | 2014-05-07 | 山西东方创赢环保科技有限公司 | High-turbidity water treatment system |
| CN103787528A (en) * | 2014-01-23 | 2014-05-14 | 山西东方创赢环保科技有限公司 | Underground movable mine water treatment system for coal mine |
| CN104098209A (en) * | 2014-07-18 | 2014-10-15 | 同济大学 | Combined process and device for treating slightly polluted water |
| CN104529018A (en) * | 2014-12-29 | 2015-04-22 | 广东沃杰森环保科技有限公司 | Process for treating and recycling printing and dyeing wastewater by virtue of electro-coagulation |
| CN104743684A (en) * | 2015-04-08 | 2015-07-01 | 山东钢铁股份有限公司 | Industrial wastewater recycling system |
| CN105036423A (en) * | 2015-06-25 | 2015-11-11 | 青岛双瑞海洋环境工程股份有限公司 | Electrolytic treatment system of ship domestic sewage |
| CN105084613A (en) * | 2015-08-10 | 2015-11-25 | 厦门世达膜科技有限公司 | Industrial wastewater zero discharging technology for phytoextraction industry |
| CN105330104A (en) * | 2015-10-30 | 2016-02-17 | 无锡市嘉邦电力管道厂 | Sewage treatment technology based on electric flocculation |
| CN105967405A (en) * | 2016-06-28 | 2016-09-28 | 南京德邦金属装备工程股份有限公司 | Treating and recycling method of coal washing wastewater |
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| CN101948201A (en) * | 2010-09-11 | 2011-01-19 | 山东招金膜天有限责任公司 | Oil extraction sewage olation and recycling combined treating process |
| CN102267774A (en) * | 2011-07-27 | 2011-12-07 | 宝钢工程技术集团有限公司 | Strong brine processing system |
| CN102276094A (en) * | 2011-07-27 | 2011-12-14 | 宝钢工程技术集团有限公司 | Method for treating strong brine |
| CN102381815A (en) * | 2011-09-30 | 2012-03-21 | 江苏春晖乳业有限公司 | Treatment method of milk production wastewater |
| CN102807297A (en) * | 2012-07-31 | 2012-12-05 | 海门市兴农畜牧机械制造有限公司 | All-in-one quick sewage treatment machine |
| CN102976482A (en) * | 2012-12-24 | 2013-03-20 | 东北大学 | Polymembrane bioreactor by in situ electrocoagulation and method for treating wastewater |
| CN103539295A (en) * | 2013-10-30 | 2014-01-29 | 北京清大国华环保科技有限公司 | Method and device for deeply treating heavy metal wastewater |
| CN103570168A (en) * | 2013-11-15 | 2014-02-12 | 苏州巨联科技有限公司 | Modular electroflocculation water treatment device |
| CN103771604A (en) * | 2014-01-23 | 2014-05-07 | 山西东方创赢环保科技有限公司 | High-turbidity water treatment system |
| CN103787528A (en) * | 2014-01-23 | 2014-05-14 | 山西东方创赢环保科技有限公司 | Underground movable mine water treatment system for coal mine |
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| CN104098209A (en) * | 2014-07-18 | 2014-10-15 | 同济大学 | Combined process and device for treating slightly polluted water |
| CN104529018A (en) * | 2014-12-29 | 2015-04-22 | 广东沃杰森环保科技有限公司 | Process for treating and recycling printing and dyeing wastewater by virtue of electro-coagulation |
| CN104743684A (en) * | 2015-04-08 | 2015-07-01 | 山东钢铁股份有限公司 | Industrial wastewater recycling system |
| CN105036423A (en) * | 2015-06-25 | 2015-11-11 | 青岛双瑞海洋环境工程股份有限公司 | Electrolytic treatment system of ship domestic sewage |
| CN105084613A (en) * | 2015-08-10 | 2015-11-25 | 厦门世达膜科技有限公司 | Industrial wastewater zero discharging technology for phytoextraction industry |
| CN105330104A (en) * | 2015-10-30 | 2016-02-17 | 无锡市嘉邦电力管道厂 | Sewage treatment technology based on electric flocculation |
| CN105967405A (en) * | 2016-06-28 | 2016-09-28 | 南京德邦金属装备工程股份有限公司 | Treating and recycling method of coal washing wastewater |
| CN108658364A (en) * | 2017-11-27 | 2018-10-16 | 江苏久吾高科技股份有限公司 | A kind of processing method and processing device of glufosinate-ammonium waste water |
| CN108503118A (en) * | 2018-04-24 | 2018-09-07 | 霍巍 | A kind of pharmaceutical production wastewater ocean disposal device |
| CN109179826A (en) * | 2018-08-16 | 2019-01-11 | 江苏华晖环保科技有限公司 | A kind of strong brine processing technology of achievable zero-emission |
| CN109354134A (en) * | 2018-10-24 | 2019-02-19 | 东莞市三人行环境科技有限公司 | A kind of method of electric flocculation removal anodic oxidation Determinating Chromaticity of Dyeing Effluent |
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