CN103011433A - Method for purifying sewage by utilizing powder active carbon - Google Patents
Method for purifying sewage by utilizing powder active carbon Download PDFInfo
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- CN103011433A CN103011433A CN2012105820120A CN201210582012A CN103011433A CN 103011433 A CN103011433 A CN 103011433A CN 2012105820120 A CN2012105820120 A CN 2012105820120A CN 201210582012 A CN201210582012 A CN 201210582012A CN 103011433 A CN103011433 A CN 103011433A
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- active carbon
- activated carbon
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Abstract
The invention relates to a method for purifying sewage by utilizing powder active carbon. The method comprises the following steps of: adding powder active carbon into sewage according to the proportion of over one per mille to stir for 0.3-0.8 hour; separating and recovering the active carbon to reuse; adjusting a pH value of the powder active carbon to be 0.5-2 when the adsorbing capacity of the active carbon is tendency to be saturated to stir for 20-40 minutes; removing acid liquid and putting the active carbon into a vacuum heating device; retaining the vacuum degree under the pressure of 0.05-0.08MPa; rising the temperature to 250-650 DEG C to keep for 8-12 hours. The regenerated active carbon has a good effect, and can be repeatedly regenerate for 30 times, so that the whole method is simple, effective and extremely low in cost.
Description
Technical field
The present invention relates to a kind of method of utilizing Powdered Activated Carbon to purify waste water, belong to environmental technology field.
Background technology
The history that the powdered carbon purification techniques is processed water is for 70 years, smell flavor so far from what the U.S.'s for the first time powder application shaped activated carbon elimination chlorophenol brought, the effective means of removing impurity in the water is still the active carbon purifying technology, and its decontamination effect improving has obtained numerous countries and approved.
Gac can be divided into Powdered Activated Carbon or granulated active carbon by face shaping.Generally will pass through 80 mesh standard sieves or granularity gac common name Powdered Activated Carbon or the powdery carbon less than 0.175mm more than 90%, granularity is called a material gac greater than the gac of 0.175mm.Along with the progress of isolation technique and the appearance of some application requiring, the granularity of powdery carbon has the tendency of more and more refinement, and some occasions have reached micron even nano level.Gac is to be black by a kind of outward appearance that carbonaceous material is made, and the internal void structure is flourishing, surface-area is large, the little quality carbon materials of a class of high adsorption capacity.Gac is large as a kind of surface-area, the Low Cost Sorbents of high adsorption capacity, and the application aspect municipal effluent, advanced treatment of industrial waste water and Purification of Polluted Sources of Water is very extensive at present.
Solute molecule is the process of a complexity in the Powdered Activated Carbon planar water, is the coefficient results of several power, comprises ion magnetism, Van der Waals force, chemical assorted and power.After adding Powdered Activated Carbon, water body considerable part organism is removed, and gelatinoid content reduces in the water body, and surface viscosity descends.Powder activated carbon is adsorbed on the throw out, the bridge formation that is conducive to flco, can improve the structure of flco, so to lower, the with serious pollution water body of turbidity, add Powdered Activated Carbon except good removal organic contamination ability is arranged, effluent quality be greatly improved, be a kind of investment relatively little, produce effects fast, especially for larger old water factory, be a kind of reliable purification process.
The granulated active carbon price is more expensive, reuses after renewable, and convenient operation and management, therefore in water treatment, use at present more.Compare with granular gac, Powdered Activated Carbon preparation easily, price is relatively low, high adsorption capacity, rate of adsorption is fast, and adsorptive power uses the advantages such as abundant, but needs proprietary separation method, and the difficult cost of regenerating is higher.
Summary of the invention
The system that technical problem to be solved by this invention is to provide a kind of cheapness and utilizes efficiently activated carbon treatment sewage.
Technical scheme of the present invention may further comprise the steps:
(1) add Powdered Activated Carbon in sewage, the part by weight of Powdered Activated Carbon and sewage mixed 0.3～0.8 hour more than 1 ‰;
(2) the charcoal water mixed liquid is carried out charcoal moisture from, isolated Powdered Activated Carbon is reused, if isolated colority of water reaches 10 times, needs to regenerate to Powdered Activated Carbon;
(3) regeneration is carried out according to the following procedure: the Powdered Activated Carbon acid for adjusting pH 0.5 ~ 2 with activity descends, stirred 20 ~ 40 minutes, and take off the acid solution after washing, place again vacuum heater, keep vacuum tightness 0.05MPa～0.08MPa, be warming up to 250～650 ℃ after, keep again 8 ~ 12h.
The organism of charcoal absorption at high temperature decomposes, volatilization, carbonization, and gac recovers the space of mesopore and micropore.Gac after the regeneration recovers adsorption activity, can be added to and reuse in the sewage about 3 times.
In the step (2), charcoal moisture is from using plate-and-frame filter press.
The present invention adopt plate-and-frame filter press to Powdered Activated Carbon carry out charcoal moisture from, equipment is simple to operation, cost is low, isolated Powdered Activated Carbon is reusable.After approximately using for 3 times, the Powdered Activated Carbon activity decreased, it is saturated that adsorptive capacity is tending towards, and can reuse after the inventive method is carried out activating and regenerating.Because Powdered Activated Carbon can be regenerated approximately 30 times, so the service efficiency of Powdered Activated Carbon is very high in the inventive method, the overall operation cost is very low.
Embodiment
Embodiment 1:
1, the Powdered Activated Carbon (granularity is less than 0.175mm) of 30 ~ 300kg/h is put into 300m
3In the sewage after the materialization of/h flow is processed, aeration agitation 20min, with filtering in the pump suction plate-and-frame filter press, the separated powder gac forms filtering layer.Speed of filter pressing is fast, and sewage is purified, and less than 1.5NTU, chemical oxygen demand (COD) is less than 60mg/L less than 3 times, turbidity for average filtrate colourity.
2, about work 8h, the filter press increased pressure, filtering rate is slower, and gac is full of in the sheet frame, stop into water, open sheet frame, the wet gac of separation is added in the sewage again, repeats the 1st step, when multiplicity reaches 3 times, Colority of Sewage Water is 10 times after filtering, and the charcoal absorption pollutent needs to consider regeneration near saturated.
3, the gac that will regenerate 36.5wt% salt acid for adjusting pH to 0.5 ~ 2, filter out acid solution, the washing disacidify, wet gac is delivered to vacuum heater, keep vacuum tightness 0.05MPa～0.08MPa, heating, removal activity charcoal moisture progressively is warming up to 650 ℃ again, control vacuum tightness 0.05MPa, keep 8h, make the organic substance decomposing volatilization of adsorbing in the gac, gac is regenerated.
20 gram gacs are dissolved in the 250mL tap water, and the laboratory vacuum pump suction filtration forms filtering layer, gets in the dyeing and printing sewage treatment plant of Zhejiang that second pond water outlet 750mL continues suction filtration between waterwheel, the record suction filtration time, measures turbidity, colourity and chemical oxygen demand (COD).Regeneration tests result such as following table 1:
Table 1 activating and regenerating result
Embodiment 2
20 gram gacs are dissolved in the 250mL tap water, and the laboratory vacuum pump suction filtration forms filtering layer, gets in certain dyeing and printing sewage treatment plant second pond water outlet 750mL between waterwheel, before the regeneration, and 765 seconds consuming time of water sample 750mL suction filtration, delivery turbidity 3.2NTU, suction filtration water outlet 171mg/L.The gac of inactivation is with acid for adjusting pH to 0.5 ~ 2, filter out acid solution, washing, wet gac is delivered to vacuum heater, keep vacuum tightness 0.05MPa～0.08MPa, heating, removal activity charcoal moisture progressively is warming up to 250 ℃ again, control vacuum tightness 0.05MPa, keep 12h, make the organic substance decomposing volatilization of adsorbing in the gac, gac is regenerated.
Each suction filtration 750mL water sample again, lasting suction filtration repeatedly, record at every turn consuming time, mensuration suction filtration delivery turbidity and COD value, the water outlet color is colourless.
The table 2 gac result that repeatedly regenerates
| Regeneration times | Residual mass (g) | The suction filtration number of times | Average turbidity | Average COD | Color |
| 1 | 18.9 | 32 | 1.2 | 42 | Colourless |
| 5 | 17.1 | 32 | 0.8 | 45 | Colourless |
| 10 | 16.3 | 31 | 0.7 | 39 | Colourless |
| 15 | 16.1 | 25 | 1.1 | 41 | Colourless |
| 20 | 15.3 | 22 | 1.2 | 42 | Colourless |
| 25 | 14.2 | 21 | 1.1 | 43 | Colourless |
| 30 | 13.7 | 17 | 1.1 | 39 | Colourless |
Annotate: can loss part gac in suction filtration and regenerative process
Can find out from above result: during repeating regeneration test, after nearly 30 times of the regeneration of activated carbon, still better to filtration and the decolorizing effect of former water.
Claims (2)
1. the method for an active carbon purifying sewage is characterized in that, comprises the steps:
(1) add Powdered Activated Carbon in sewage, the part by weight of Powdered Activated Carbon and sewage mixed 0.3～0.8 hour more than 1 ‰;
(2) the charcoal water mixed liquid is carried out charcoal moisture from, isolated Powdered Activated Carbon is reused, if isolated colority of water reaches 10 times, needs to regenerate to Powdered Activated Carbon;
(3) regeneration is carried out according to the following procedure: the Powdered Activated Carbon acid for adjusting pH 0.5 ~ 2 with inactivation, stirred 20 ~ 40 minutes, and take off the acid solution after washing, place again vacuum heater, keep vacuum tightness 0.05MPa～0.08MPa, be warming up to 250～650 ℃ after, keep again 8～12h.
2. the Powdered Activated Carbon according to claim 1 method of purifying waste water is characterized in that, in the step (2), charcoal moisture is from using plate-and-frame filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105820120A CN103011433A (en) | 2012-12-28 | 2012-12-28 | Method for purifying sewage by utilizing powder active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105820120A CN103011433A (en) | 2012-12-28 | 2012-12-28 | Method for purifying sewage by utilizing powder active carbon |
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| CN103011433A true CN103011433A (en) | 2013-04-03 |
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| CN2012105820120A Pending CN103011433A (en) | 2012-12-28 | 2012-12-28 | Method for purifying sewage by utilizing powder active carbon |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739104A (en) * | 2014-01-22 | 2014-04-23 | 湖北君集水处理有限公司 | System and method for purifying sewage by powdered active carbon |
| CN107445337A (en) * | 2017-08-21 | 2017-12-08 | 武汉和尔环保科技有限公司 | A kind of method using Fenton reagent and active carbon purifying sewage |
| CN107487890A (en) * | 2017-08-21 | 2017-12-19 | 武汉和尔环保科技有限公司 | A kind of method using persulfate and active carbon purifying sewage |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173532A (en) * | 2011-02-22 | 2011-09-07 | 雷耀隆 | Method for removing pigment of molasses alcohol wastewater by using biotechnology |
-
2012
- 2012-12-28 CN CN2012105820120A patent/CN103011433A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173532A (en) * | 2011-02-22 | 2011-09-07 | 雷耀隆 | Method for removing pigment of molasses alcohol wastewater by using biotechnology |
Non-Patent Citations (2)
| Title |
|---|
| 水工业市场杂志: "《2011水处理典型技术案例大全》", 31 March 2012, 中国环境科学出版社 * |
| 王关斌等: "木糖生产中废旧活性炭再生条件初步研究", 《应用化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739104A (en) * | 2014-01-22 | 2014-04-23 | 湖北君集水处理有限公司 | System and method for purifying sewage by powdered active carbon |
| CN107445337A (en) * | 2017-08-21 | 2017-12-08 | 武汉和尔环保科技有限公司 | A kind of method using Fenton reagent and active carbon purifying sewage |
| CN107487890A (en) * | 2017-08-21 | 2017-12-19 | 武汉和尔环保科技有限公司 | A kind of method using persulfate and active carbon purifying sewage |
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Application publication date: 20130403 |