CN105271477A - Deep treatment method of municipal waste landfill leachate - Google Patents
Deep treatment method of municipal waste landfill leachate Download PDFInfo
- Publication number
- CN105271477A CN105271477A CN201410248524.2A CN201410248524A CN105271477A CN 105271477 A CN105271477 A CN 105271477A CN 201410248524 A CN201410248524 A CN 201410248524A CN 105271477 A CN105271477 A CN 105271477A
- Authority
- CN
- China
- Prior art keywords
- treatment method
- molysite
- deep treatment
- electrolysis
- sewage
- 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.)
- Pending
Links
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
A deep treatment method of a municipal waste landfill leachate comprises the following steps: adding a ferrous salt or an iron salt to sewage, adjusting the pH value to be smaller than 7, allowing the above obtained sewage to enter an electrolytic tank with an insoluble anode, and carrying out electrolytic treatment; adding an alkali to electrolytic outlet water to adjust the pH value to approach 7 in order to precipitate the ferrous or iron salt, and discharging the obtained supernatant; and recycling the ferrous or iron salt.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to the deep treatment method of the sewage such as a kind of percolate from garbage filling field.
Background technology
The disposal of municipal wastes is still based on sanitary landfill, the percolate produced in refuse landfill, be a kind of high pollution concentration, polycomponent organic waste water, it is its key character that water quality and quantity fluctuates widely, and therefore the process of percolate is a global difficult problem always.
At present, the process of percolate has biological process, physico-chemical process and land treatment systems method.Because Landfill Leachate Pollution substrate concentration is high, from technology and economic two angle analysis of present stage, the method for single use materialization can not be dealt with problems, and the method for materialization can only as pre-treatment and the means strengthening process.Biological process is still the main and important treatment process of percolate, and conventional biological method has anaerobic process (oxygen lacking method), aerobic method, biological pond method and recharges facture etc.In various biological treatment, anaerobic process (oxygen lacking method) and aerobic method combination treatment are main processing units, and this technique is to the organism in percolate and ammonia nitrogen degradation Be very effective.The method of recharging be exactly with appropriate means by landfill yard bottom collection to percolate from covering layer of landfill site surface or tectum bottom again pour into landfill yard, utilize landfill yard waste layer this " bacteria bed ", by absorption, the ion-exchange and sequestering action etc. of the Degradation of the anaerobion in the aerobic microbiological of upper soll layer, buring layer and soil particle, percolate is purified.The method of recharging has that scavenging effect is good, investment can the advantages such as running cost is low.It is substantially identical with the method for recharging that the water purification of land treatment systems method swashs mechanism.Although the scavenging effect of above technique or process combination is better, but still the relevant emission standards of country cannot be reached, therefore also must carry out advanced treatment to it.
The advanced treatment of percolate generally should be selected from materialization or chemical method, and electrolytic process is exactly can effectively remove one of method of pollutent in percolate.It is simple that this method has equipment, convenient management, the advantages such as weatherproof, not only can directly by direct for organism mineralising, by the oxygenizement of anode, not biodegradable organism can also be converted into biodegradable organism, and then utilize biological process thoroughly to be removed by organism.According to the achievement in research of present stage, the energy consumption utilizing electrolytic process to remove the CODcr of 1kg in percolate is generally greater than 40kw.h, such energy consumption limits the application of this method in Practical Project, and the energy consumption problem therefore how reducing electrolytic process is the key that can this method be used widely.
Summary of the invention
The object of the invention is to propose the deep treatment method of the sewage such as the percolate from garbage filling field that a kind of energy consumption is low, efficiency is high.
The advanced waste treatment method that the present invention proposes, be a kind of " electrolytic process urged by iron ", concrete steps are in sewage, add ferrous salt or molysite, and regulate pH to be acid, then enter the electrolyzer adopting insoluble anode, carry out electrolysis treatment; Electrolysis water outlet adds alkali and regulates pH to close to neutral, and precipitate molysite, supernatant liquor discharges; Molysite recycles.
In the inventive method, add ferrous salt or molysite, make its concentration be 500-2500mg/L.During electrolysis, its current density is 5-40mA/cm
2, electrolysis time 20-60 minute.
The inventive method can be used for the advanced treatment of percolated liquid in city refuse landfill, also can be used for the process of other difficult-degradation organic sewage, is specially adapted to the advanced treatment of the waste water such as weaving, printing and dyeing, papermaking.Through process of the present invention, supernatant C ODcr concentration is less than 250mg/L, can reach percolate secondary discharge standard; Colourity is less than 10 times, NH
3-N concentration is less than 10mg/L, can reach percolate first discharge standard.The present invention greatly reduces electrolysis energy consumption, reaches engineer applied level.
Embodiment
Regulate pH in acid (pH value is 2 ~ 4) scope with industrial spent pickle liquor the percolate through pre-treatment (biological process or mineralized waste recharge), add FeCl
2, FeSO
4, FeCl
3or Fe
2(SO
4)
3deng, its concentration is respectively 500mg/L, 1000mg/L, 2000mg/L, 2500mg/L etc., then uses respectively to adopt the electrolyzer of insoluble anode to carry out electrolysis, and current density gets 5mA/cm respectively
2, 15mA/cm
2, 30mA/cm
2, 40mA/cm
2deng, electrolysis 20-60 minute.The industrial waste lye of water outlet after electrolysis, NaOH, Ca (OH)
2deng, regulate pH for neutral (pH value is 6 ~ 7), supernatant liquor all can qualified discharge.Regulate the molysite of pH precipitation to use industrial acid-washed waste liquid to dissolve and return electrolysis reactor re-using, avoid the problem of sludge dewatering.Because molysite can recycle in the process of disposing of sewage, only there is a small amount of loss, therefore only need supplement a small amount of molysite in operational process.
Claims (3)
1. a deep treatment method for percolate from garbage filling field, is characterized in that concrete steps are: in sewage, add ferrous salt or molysite, and regulates pH to be acid, then enters the electrolyzer adopting insoluble anode, carries out electrolysis treatment; Electrolysis water outlet adds alkali and regulates pH to close to neutral, and precipitate molysite, supernatant liquor discharges; Molysite recycles.
2. the deep treatment method of sewage according to claim 1, it is characterized in that the ferrous salt that adds or molysite, its concentration is 500-2500mg/L.
3. the deep treatment method of sewage according to claim 1, when it is characterized in that electrolysis, current density is 5-40mA/cm
2, electrolysis time 20-60 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248524.2A CN105271477A (en) | 2014-06-06 | 2014-06-06 | Deep treatment method of municipal waste landfill leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248524.2A CN105271477A (en) | 2014-06-06 | 2014-06-06 | Deep treatment method of municipal waste landfill leachate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105271477A true CN105271477A (en) | 2016-01-27 |
Family
ID=55141415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410248524.2A Pending CN105271477A (en) | 2014-06-06 | 2014-06-06 | Deep treatment method of municipal waste landfill leachate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105271477A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1579966A (en) * | 2004-04-08 | 2005-02-16 | 同济大学 | Deep treating method of sewage, such as percolate for urban refuse filling area |
| JP2005230707A (en) * | 2004-02-20 | 2005-09-02 | Mitsubishi Heavy Ind Ltd | Electrochemical reaction method and apparatus |
| CN101700949A (en) * | 2009-11-04 | 2010-05-05 | 丹东恒诚环保科技开发有限公司 | Waste leachate purification process method |
| CN102786183A (en) * | 2012-03-29 | 2012-11-21 | 波鹰(厦门)科技有限公司 | Method for processing garbage leachate |
-
2014
- 2014-06-06 CN CN201410248524.2A patent/CN105271477A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005230707A (en) * | 2004-02-20 | 2005-09-02 | Mitsubishi Heavy Ind Ltd | Electrochemical reaction method and apparatus |
| CN1579966A (en) * | 2004-04-08 | 2005-02-16 | 同济大学 | Deep treating method of sewage, such as percolate for urban refuse filling area |
| CN101700949A (en) * | 2009-11-04 | 2010-05-05 | 丹东恒诚环保科技开发有限公司 | Waste leachate purification process method |
| CN102786183A (en) * | 2012-03-29 | 2012-11-21 | 波鹰(厦门)科技有限公司 | Method for processing garbage leachate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101698550A (en) | Advanced treating method of landfill leachate | |
| CN102583879A (en) | High-concentration integrated chemical organic wastewater treatment process | |
| CN107032537A (en) | A kind of processing method of refuse leachate nanofiltration concentrated water | |
| CN103723886B (en) | Cyclotetramethylenete-tranitramine production sewage treatment device and method | |
| CN101723345A (en) | Method for recovering phosphorus from phosphorus containing sludge | |
| Huang et al. | Recycling struvite pyrolysate obtained at negative pressure for ammonia nitrogen removal from landfill leachate | |
| CN204022629U (en) | The treatment system of tetrahydrofuran (THF) waste water and pyridines waste water | |
| CN110407412A (en) | It is a kind of to utilize high-power electron beam catalysis oxidation method for treating garbage percolation liquid | |
| CN103922521B (en) | Method used for chrome tanning waste water treatment and chrome recovery | |
| CN102491592A (en) | Method for treating concentrate produced by landfill leachate | |
| CN103601313A (en) | Processing method of landfill leachate | |
| Dai et al. | Investigation of a sewage-integrated technology combining an expanded granular sludge bed (EGSB) and an electrochemical reactor in a pilot-scale plant | |
| CN101948220B (en) | Printing and dyeing wastewater treatment method | |
| CN105036490A (en) | Method for removing nitrogen through treating refuse leachate by using two-stage feedwater mineralized refuse reactor | |
| CN103496817A (en) | Garbage leachate treatment method | |
| CN102992459A (en) | Method for treating wastewater by using flocculant | |
| CN1303016C (en) | Deep treating method of sewage, such as percolate for urban refuse filling area | |
| CN105084686A (en) | Sanitary production method for recycling residual activated sludge in sewage treatment plant | |
| CN105293791A (en) | Treatment method for manganese ore wastewater | |
| CN101665307B (en) | Rubbish leachate treatment method | |
| CN105271477A (en) | Deep treatment method of municipal waste landfill leachate | |
| CN103304113A (en) | Sludge treatment method | |
| Haroun et al. | Septage as a Resource and Potential Strategies for Resource Recovery | |
| CN102659220B (en) | Method for removing ferric phosphate film and ferrous phosphate passivating film from filler surface layer in iron-carbon microelectrolysis reactor | |
| CN203878019U (en) | Device for treating waste water produced during production of cyclotetramethylene tetranitramine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |