CN109368883A - A kind of electric flocculation laundrywastes processing method - Google Patents

A kind of electric flocculation laundrywastes processing method Download PDF

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Publication number
CN109368883A
CN109368883A CN201811427946.0A CN201811427946A CN109368883A CN 109368883 A CN109368883 A CN 109368883A CN 201811427946 A CN201811427946 A CN 201811427946A CN 109368883 A CN109368883 A CN 109368883A
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China
Prior art keywords
laundrywastes
electric flocculation
plate
processing method
aeration
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Pending
Application number
CN201811427946.0A
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Chinese (zh)
Inventor
储金宇
马云
杜彦生
李启迪
钱斌
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Jiangsu University
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Jiangsu University
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Priority to CN201811427946.0A priority Critical patent/CN109368883A/en
Publication of CN109368883A publication Critical patent/CN109368883A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104Devices therefor; Their operating or servicing
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104Devices therefor; Their operating or servicing
    • C02F1/46109Electrodes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/465Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002Grey water, e.g. from clothes washers, showers or dishwashers
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/46Apparatus for electrochemical processes
    • C02F2201/461Electrolysis apparatus
    • C02F2201/46105Details relating to the electrolytic devices
    • C02F2201/4612Controlling or monitoring
    • C02F2201/46125Electrical variables
    • C02F2201/4614Current
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/46Apparatus for electrochemical processes
    • C02F2201/461Electrolysis apparatus
    • C02F2201/46105Details relating to the electrolytic devices
    • C02F2201/4612Controlling or monitoring
    • C02F2201/4615Time
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/46Apparatus for electrochemical processes
    • C02F2201/461Electrolysis apparatus
    • C02F2201/46105Details relating to the electrolytic devices
    • C02F2201/4619Supplying gas to the electrolyte
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/08Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/11Turbidity

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The present invention relates to environmental technology fields, and in particular to a kind of electric flocculation laundrywastes processing method.The present invention in conjunction with aeration plate and is scraped slag structure and improves flocculating effect well using the electrolytic cell of the mixing arrangement mode arrangement of stainless steel plate and aluminium sheet;From bottom uniform aeration, the floccule for being conducive to electric flocculation generation attaches to the micro-bubble of generation and floats up to liquid level and scrape with slag structure is scraped nanometer aeration disk.Efficiently solve the problems such as electric flocculation method processing laundry water treatment effect is poor, and water outlet is turned to be yellow and muddiness, subsequent filter device burden weight.The floccule not struck off further is adsorbed using nanosponges, is filtered, other materials is overcome and easily blocks, is difficult to the disadvantages of backwashing, easy to disassemble, cleaning, reuse and low in cost.Water quality is clarified and can reach reusing sewage standard after laundrywastes processing unit of the present invention processing.

Description

A kind of electric flocculation laundrywastes processing method
Technical field
The present invention relates to environmental technology fields, and in particular to a kind of electric flocculation laundrywastes processing method.
Background technique
China is poorest one of the country of global per capita water resource.With the raising of national life level, domestic water Amount dramatically increases, and wherein wash water accounts for about the 20% of domestic consumption40%, particularly important ratio is accounted in domestic water. Wherein washing water accounts for about the 40% of laundrywastes, and rinse water accounts for the 60% of laundrywastes.Laundrywastes is the lighter life of a kind of pollution Sewage living, major pollutants are surfactant, grease stain, dust particle and clothes fiber etc..But by laundrywastes It is directly discharged into water body without any processing, aquatic animals and plants can be caused to seriously endanger.And surface is living in laundrywastes Property agent concentration increase, can form colloid in conjunction with other pollutants after discharge and also can to the processing of sanitary sewage, industrial wastewater Have a great impact.
Electric flocculation technique has many advantages, such as that small, at low cost, the easy manipulation for the treatment of effeciency height, occupied area, secondary pollution are small.? It is widely used in the processing of the industrial wastewaters such as dyeing waste water, wastewater from car washer, paper waste, electroplating wastewater.Electric flocculation reaction master It to include that flocculation, air bearing effect, redox are generated big using the electrolysis of soluble anode (metals such as aluminium, iron) The pollution in laundrywastes can be efficiently removed by hydrolyzing, being polymerized to multinuclear hydroxo complex by measuring aluminium ion and iron ion Object.
Currently, the plate material that electric flocculation technique uses is the metals such as iron, aluminium, titanium mostly, due to laundrywastes meta-alkalescence, Water quality pH, using aluminium sheet as soluble anode, is unfavorable for the cohesion of floccule, poor processing effect between 9.3~10.2.Iron Plate generates Fe (OH) as anode, electrolysis2、Fe(OH)3So that effluent quality turns to be yellow.And titanium plate cost is too high, is unfavorable for extensive It uses.Independent electric flocculation technique processing laundrywastes is poor to the removal effect of major pollutants (LAS), need to combine other technologies Improve the removal effect of LAS in laundrywastes, the flock formed after electric flocculation reaction in the prior art is extremely small, passes through The further purified treatment of filter easily results in blockage, it is difficult to backwash.
Summary of the invention
To solve problems of the prior art, the object of the present invention is to provide at a kind of electric flocculation laundrywastes Reason method, electric flocculation laundrywastes processing method provided by the invention can overcome the removal effect of LAS in the prior art poor, easy It blocks, be difficult to the problems such as backwashing.
To achieve the above object, a kind of electric flocculation laundrywastes processing method of the present invention is through the following steps that realize: (1) laundrywastes is discharged in electrolytic cell, aeration plate is aerated while electrolytic tank electrolysis;(2) Wastewater by Electric is wadded a quilt with cotton when being electrolysed Floccule caused by solidifying is attached on bubble caused by reaction, with bubble floating to liquid level, is struck off and is floated up to liquid level Floccule carries out deslagging;(3) by treated in step (2), waste water is transported in the filter containing nanosponges, nanometer sea The processing of laundrywastes is completed after silk floss filtering.
In the present invention, it is preferable that the anodes in electrolytic cells pole plate is made of stainless steel plate and aluminium sheet mixing, cathode pole Plate is stainless steel plate or aluminium sheet;The plate interval is placed in the two sides of cathode plate.
Further, stainless steel plate and aluminium sheet number ratio are 1:1 in the anodes in electrolytic cells pole plate.
The pole plate spacing of the plate and cathode plate is 2cm~4cm.
Further, the aeration plate in the step (1) is nanometer aeration disk, the aeration quantity of aeration plate 6L/min~ 20L/min。
The time of electrolysis in the step (1) is 5min~20min.
Current density caused by electrolysis in the step (1) is 2mA/cm2~7mA/cm2
Compared with prior art, the beneficial effects of the present invention are:
As can be seen from the above technical solutions, in the laundrywastes processing method that technical solution of the present invention provides, electrolytic cell middle-jiao yang, function of the spleen and stomach Pole pole plate improves flocculating effect in conjunction with aeration plate with the mixing arrangement mode of stainless steel plate and aluminium sheet arrangement well;Stainless steel Anode is few compared with iron/aluminium anodes loss, not perishable, improves the service life of anode plate;Aeration plate uniform aeration, not only makes electricity The floccule of flocculation generation attaches to aeration plate and is electrolysed on generated dual bubble, and floccule floats up to after liquid level convenient for receipts Collection strikes off, and helps to dilute the density of hydrogen that cathode generates, and prevents the hydrogen aggregation in confined space from causing to explode.Using receiving Meter Hai Mian further adsorbs the floccule not struck off, filters, and overcomes other materials and easily blocks, is difficult to backwash etc. and lacks Point, easy to disassemble, cleaning, reuse and low in cost.
Electric flocculation carries out simultaneously with air bearing in technical solution provided by the invention, and the floccule that electric flocculation generates is with aeration plate The gas of generation floats to the water surface and is cleaned collection, and nanosponges are further separated by filtration, and contaminant removal efficiency is high, is not easy to block up Plug and backwash, and it is low in cost, suitable for industrial is promoted.The removal effect for overcoming LAS in the prior art is poor, easily stifled It fills in, be difficult to the disadvantages of backwashing;It is poor to efficiently solve traditional electric flocculation method processing laundry water treatment effect, water outlet jaundice and muddy Turbid, subsequent filter device bears the problems such as heavy.By laundrywastes processing unit of the present invention processing after water quality clarification and It can reach reusing sewage standard.
Detailed description of the invention
Fig. 1 is the process flow chart of electric flocculation air-flotation process laundrywastes.
Specific embodiment
Embodiment is illustrated referring to attached drawing, embodiments illustrated below does not play the summary of the invention that claim is recorded Any ground restriction effect, is in conjunction with specific embodiments described in further details the present invention.
Embodiment 1:
Take the laundrywastes of certain university student apartment laundry;For first time washing water 60L, anion in laundrywastes is detected Surfactant is 290mg/L, and COD (COD) is 521mg/L, and laundrywastes is passed through coagulation by turbidity 257NTU Device is electrolysed and is aerated to electric flocculation device after powering on, and liquid level dross is scraped off, and is arranged in electric flocculation device between pole plate Away from for 2cm, 5 mA/cm of current density2, aeration quantity 6L/min;After being electrolysed 5min, 5min is stood, processing water is pumped into filtering In device, it is discharged after nanosponges filter.Effluent quality after laundrywastes and processing is detected, Testing index is as follows Table 1:
Effluent quality detects table after 1. laundrywastes of table and processing
Project Anionic surfactant (mg/L) COD(mg/L) Turbidity (NTU) pH
Laundrywastes 290.5 521.1 257 7.8
Water outlet 2.4 29.8 1.1 7.9
As shown in Table 1, laundrywastes by anionic surfactant in treated the water outlet of electric flocculation device every pollution Object index restores normal, reaches reusing sewage standard.
Embodiment 2:
Take the laundrywastes of certain university student apartment laundry;For first time washing water 60L, anion in laundrywastes is detected Surfactant is 290mg/L, COD 521mg/L, turbidity 257NTU, and laundrywastes is passed through electric flocculation device, connects electricity Electric flocculation device is electrolysed and is aerated behind source, scrapes off liquid level dross, it is 3cm, electricity that pole plate spacing in electric flocculation device, which is arranged, Current density 2-7mA/cm2, aeration quantity 20L/min;Directly processing water is pumped into filter device after electrolysis 20min, by receiving It is discharged after meter Hai Mian filtering.It is 3.2mg/L through LAS content in detection water outlet, COD 45.3mg/L, turbidity 2.1NTU reach Reusing sewage standard can direct reuse.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (7)

1. a kind of electric flocculation laundrywastes processing method, which comprises the following steps:
(1) laundrywastes is discharged in electrolytic cell, aeration plate is aerated while electrolysis;
(2) floccule caused by waste water electric flocculation is attached on bubble caused by reaction when being electrolysed, extremely with bubble floating Liquid level strikes off the floccule progress deslagging for floating up to liquid level;
(3) by treated in step (2), waste water is transported in the filter containing nanosponges, i.e. complete after nanosponges filtering At the processing of laundrywastes.
2. electric flocculation laundrywastes processing method according to claim 1, which is characterized in that the exposure in the step (1) Gas disk is nanometer aeration disk, and the aeration quantity of aeration plate is in 6L/min~20L/min.
3. electric flocculation laundrywastes processing method according to claim 1, which is characterized in that the electricity in the step (1) The time of solution is 5min~20min.
4. electric flocculation laundrywastes processing method according to claim 1, which is characterized in that the electricity in the step (1) The current density generated when solution is 2mA/cm2~7mA/cm2
5. electric flocculation laundrywastes processing method according to claim 1-4, which is characterized in that the electrolysis Slot Anodic pole plate is made of stainless steel plate and aluminium sheet mixing, and cathode plate is stainless steel plate or aluminium sheet;The plate Interval is placed in the two sides of cathode plate.
6. electric flocculation laundrywastes processing method according to claim 5, which is characterized in that the anodes in electrolytic cells pole Stainless steel plate and aluminium sheet number ratio are 1:1 in plate.
7. electric flocculation laundrywastes processing method according to claim 5, which is characterized in that the plate and cathode The pole plate spacing of pole plate is 2cm~4cm.
CN201811427946.0A 2018-11-27 2018-11-27 A kind of electric flocculation laundrywastes processing method Pending CN109368883A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110078270A (en) * 2019-04-23 2019-08-02 江苏大学 A kind of processing system and technique of laundrywastes
CN110078269A (en) * 2019-04-23 2019-08-02 江苏大学 A kind of processing system and technique of three-diemsnional electrode synergy ozone processing laundrywastes
CN112320902A (en) * 2020-09-22 2021-02-05 江苏大学 Cathode aeration electric Fenton-ozone laundry wastewater treatment system
CN115140856A (en) * 2021-03-30 2022-10-04 无锡小天鹅电器有限公司 Water treatment device and clothes treatment system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110078270A (en) * 2019-04-23 2019-08-02 江苏大学 A kind of processing system and technique of laundrywastes
CN110078269A (en) * 2019-04-23 2019-08-02 江苏大学 A kind of processing system and technique of three-diemsnional electrode synergy ozone processing laundrywastes
CN112320902A (en) * 2020-09-22 2021-02-05 江苏大学 Cathode aeration electric Fenton-ozone laundry wastewater treatment system
CN115140856A (en) * 2021-03-30 2022-10-04 无锡小天鹅电器有限公司 Water treatment device and clothes treatment system

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Application publication date: 20190222

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