CN110040807A - Powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method - Google Patents

Powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method Download PDF

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CN110040807A
CN110040807A CN201910280289.XA CN201910280289A CN110040807A CN 110040807 A CN110040807 A CN 110040807A CN 201910280289 A CN201910280289 A CN 201910280289A CN 110040807 A CN110040807 A CN 110040807A
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waste water
absorption
regeneration
coke
chemicals waste
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邓述波
沈露
余刚
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Tsinghua University
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Tsinghua University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30Processes for preparing, regenerating, or reactivating
    • B01J20/34Regenerating or reactivating
    • B01J20/3416Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30Processes for preparing, regenerating, or reactivating
    • B01J20/34Regenerating or reactivating
    • B01J20/345Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3475Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
    • 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
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds

Abstract

The invention discloses a kind of methods of powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water, adsorb this method comprises: powder activity coke mix by (1) with agricultural chemicals waste water, so as to after adsorb useless activated coke with adsorb after waste water;(2) activated coke of giving up after the absorption is regenerated using Fenton oxidation method.The present invention combines activated coke absorption and Fenton oxidation, and the efficient absorption removal and the regeneration of adsorbent material for realizing COD are reused.The present invention is efficient, easy to operate, low in cost, without secondary pollution, and the organic wastewater of a large amount of difficult for biological degradation pollutants is contained suitable for advanced treating agricultural chemicals waste water one kind.

Description

Powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method
Technical field
The invention belongs to field of industrial waste water treatment, more particularly to a kind of depth of the agricultural chemicals waste water of difficult for biological degradation Reason, more particularly it relates to using the COD in powder activity coke removal agricultural chemicals waste water bio-chemical effluent, and utilize Fenton Useless activated coke after oxidizing process regenerative adsorption.
Background technique
With the fast development of Chinese Industrialization, industrial wastewater water is big, complicated component, biodegradability are poor, is processed into For the problem of water treatment field.Agricultural chemicals waste water is a kind of typical difficult industrial wastewater, and still containing after biochemical treatment largely has Malicious harmful and difficult for biological degradation organic pollutant, once being discharged into water body will be present ecology and health risk.Meanwhile Chinese sewage Discharge standard is continuously improved, and traditional biochemical processing process is difficult to keep water outlet COD up to standard.Therefore, it is efficient to be badly in need of development and application And economic processing technique carries out agricultural chemicals waste water advanced treating.
Absorption method is simple and efficient, and has applied the advanced treating of various industrial wastewaters.Active carbon is common in absorbing process Adsorbent material, but activated carbon structure, based on micropore, diffusion velocity is slow, the macromolecule contaminant being difficult to remove in waste water.Meanwhile A large amount of poisonous and harmful substances have been adsorbed in waste active carbon, have be easy to cause secondary pollution, if too as danger wastes cost of disposal Height, and the thermal regeneration method charcoal loss being widely used at present is serious, and is unsuitable for situ regeneration.
Therefore, the technique for handling agricultural chemicals waste water in the prior art is further improved.
Summary of the invention
The present invention is directed to solve one of above-mentioned Related Technical Issues at least to a certain extent.For this purpose, the purpose of the present invention It is that the advanced treating for this kind of organic wastewater with difficult degradation thereby of agricultural chemicals waste water provides a kind of process, this method high treating effect, Operating cost is low, without secondary pollution, and easy to operate, stable.
It should be noted that the technical solution of the application be present inventor based on the recognition that, work and imagine It was found that:
Organic pollutant category in industrial wastewater is various, has fat, oils, esters, phenols and protein etc., also contains There are surfactant, pesticide etc., and the organic pollutant in agricultural chemicals waste water predominantly contains benzene ring substance, nitrogen-containing heterocycle substance With macromolecular long-chain organic matter, mostly Recalcitrant chemicals.The processing method of industrial wastewater has chemical oxidization method, physical chemistry Method, bioanalysis etc..Chemical oxidization method such as ozone oxidation, wet oxidation, Fenton oxidation, supercritical oxidation, electrochemical oxidation etc., place Reason effect is good, but is not suitable for the processing waste water that water is big, pollutant concentration is low;Physical-chemical process such as UF membrane, absorption etc., film Isolation technics investment is big, fouling membrane is serious, and absorption method is applied widely, but the active carbon used be easy to cause secondary pollution, together When in adsorption technology, adsorbent reactivation is the key link realizing resource reclaim and sorbent circulation and utilizing.Industrialization at present The regeneration method of active carbon of application is hot recycling, but hot recycling required temperature is high, and the device is complicated, and energy consumption is high, at high cost, charcoal loss Up to 5~20%, and it cannot achieve in-situ regeneration;Bioanalysis is the wastewater treatment method being most widely used and current agriculture The process that medicine Wastewater Concentrated mainly uses, but still containing a large amount of organic dirts in the agricultural chemicals waste water by this method processing Object is contaminated, water quality is difficult to reach discharge standard.It needs to find high treating effect as a result, and operating cost is low, without secondary pollution, operation is simple Single, stable method handles agricultural chemicals waste water.
In consideration of it, in one aspect of the invention, the present invention provides a kind of powder activity coke absorption-Fenton oxidation regeneration The method of advanced treating agricultural chemicals waste water.According to an embodiment of the invention, this method comprises:
(1) powder activity coke is mixed with agricultural chemicals waste water and is adsorbed, after give up after being adsorbed activated coke and absorption Waste water;
(2) activated coke of giving up after the absorption is regenerated using Fenton oxidation method.
Powder activity coke absorption according to an embodiment of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, For agricultural chemicals waste water bio-chemical effluent water quality characteristics, use powder activity Jiaozhuo that raw material sources are wide, cheap for adsorbent, Activated coke has flourishing central hole structure, efficiently can remove aromatic compound and macromolecular straight chain chemical combination in water removal by quick adsorption Object significantly reduces water outlet COD, reaches " urban wastewater treatment firm pollutant emission standard " level-one A standard.Meanwhile it will inhale Attached useless activated coke uses the regeneration treatment of Fenton oxidation method, and the activated coke regeneration rate that not only gives up is high, and can substantially reduce Fenton reagent Dosage, save the cost, and mesoporous prosperity also makes it easier to regenerate in activated coke, recycles reduces absorbing process operation Cost.Have the characteristics that adsorb quick, at low cost, Yi Zaisheng using method processing agricultural chemicals waste water of the invention as a result, makes this hair It is bright to be had a good application prospect in agricultural chemicals waste water advanced treating field.
In addition, powder activity coke absorption according to the above embodiment of the present invention-Fenton oxidation regeneration advanced treating pesticide is useless The method of water can also have the following additional technical features:
According to an embodiment of the invention, the COD of the agricultural chemicals waste water is 67-180mg/L in step (1).
According to an embodiment of the invention, the partial size of the powder activity coke is not more than 200 mesh in step (1).As a result, The purification efficiency of agricultural chemicals waste water can be significantly improved.
According to an embodiment of the invention, being based on 1 liter of agricultural chemicals waste water in step (1), the powder activity coke is added Amount is 0.5-1.0g.Thus, it is possible to significantly improve the purification efficiency of agricultural chemicals waste water.
According to an embodiment of the invention, the adsorption time is 10-30min in step (1).Thus, it is possible to significantly mention The purification efficiency of high agricultural chemicals waste water.
According to an embodiment of the invention, the COD of waste water is less than 50mg/L after the absorption in step (1).It inhales as a result, Attached waste water can direct qualified discharge.
According to an embodiment of the invention, ferrous sulfate concentration is in the Fenton oxidation method agents useful for same in step (2) 0.74-1.10mmol/L, the concentration of hydrogen peroxide is 100-150m/L, and the pH value of the reagent is 3-4.Be conducive to as a result, Improve the regeneration efficiency and effect of useless activated coke.
According to an embodiment of the invention, the reproduction time of the Fenton oxidation method is 20-40min in step (2).By This, can further improve the regeneration efficiency and effect of useless activated coke.
According to an embodiment of the invention, the above method further comprises: the regeneration activity coke that step (2) is obtained returns to step Suddenly (1) mixes with the agricultural chemicals waste water and is adsorbed.Thus, it is possible to realize activity while reducing agricultural chemicals waste water processing cost Burnt recycles.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become bright from conjunction with description of the attached drawing to embodiment It shows and is readily appreciated that, in which:
Fig. 1 is used in powder activity coke absorption of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method The structural schematic diagram of adsorption tanks;
Fig. 2 is the COD and overflow port water outlet of the water inlet agricultural chemicals waste water at the top of the adsorption tanks of the embodiment of the present invention 1 The relational graph of the COD of agricultural chemicals waste water after obtained absorption;
Fig. 3 is the COD and overflow port water outlet of the water inlet agricultural chemicals waste water at the top of the adsorption tanks of the embodiment of the present invention 2 The relational graph of the COD of agricultural chemicals waste water after obtained absorption;
Fig. 4 is the COD and overflow port water outlet of the water inlet agricultural chemicals waste water at the top of the adsorption tanks of the embodiment of the present invention 3 The relational graph of the COD of agricultural chemicals waste water after obtained absorption;
Fig. 5 is regeneration rate histogram of the activated coke of the embodiment of the present invention 3 after continuous 6 adsorption-regeneration alternate treatments.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.
The embodiments described below with reference to the accompanying drawings are exemplary, for explaining only the invention, and should not be understood as Limitation of the present invention.Embodiment below facilitates a better understanding of the present invention, but does not limit the present invention.In following embodiments Experimental method be unless otherwise specified conventional method.The materials, reagents and the like used in the following examples, such as without special theory It is bright, it is commercially available.
The invention proposes a kind of powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, roots According to the embodiment of the present invention, this method comprises:
It is adsorbed firstly, powder activity coke is mixed with agricultural chemicals waste water, so as to activated coke and the absorption of giving up after being adsorbed Waste water afterwards.Inventors have found that activated coke is a kind of porous carbon material not activated sufficiently, specific surface area relative activity charcoal is smaller, But pore size distribution range is wider, and central hole structure is relatively more developed, and cheap, and the organic pollutant in agricultural chemicals waste water is mainly Containing benzene ring substance, nitrogen-containing heterocycle substance and macromolecular long-chain organic matter, and powder activity coke is mixed into agricultural chemicals waste water Row absorption, the central hole structure of activated coke prosperity can efficiently and rapidly in Adsorption agricultural chemicals waste water difficult for biological degradation aromatic series Compound and macromolecular straight chain compound, significantly reduce the COD of waste water after absorption, and waste water after absorption is made to reach " town sewage Treatment plant's pollutant emission standard " level-one A standard.Specifically, powder activity coke mixed with agricultural chemicals waste water carry out absorption be to inhale It is carried out in attached tank, the absorption jar structure is as shown in Figure 1, agricultural chemicals waste water enters the adsorption zone at its center from absorption tank top, with suction Activated coke contact in attached area is adsorbed, and the waste water after absorption enters from the opening of adsorption zone conical lower portion and is located at outside adsorption zone The overflow area of side, and be discharged through the overflow port of overflow area upper end side wall, and the useless activated coke after adsorbing is also by adsorption zone taper The opening of bottom enters overflow area, and is discharged through the opening of overflow area bottom, and agricultural chemicals waste water and activated coke one in adsorption tanks It is straight to keep dynamic processes.
According to one embodiment of present invention, the COD of the agricultural chemicals waste water of above-mentioned processing is 67-180mg/L, such as can be 67-110mg/L, 110-140mg/L, 140-180mg/L, and the COD of above-mentioned adsorption tanks water inlet agricultural chemicals waste water is with life It dissolves water change of water quality and changes, while in order to improve the removal rate of organic matter in agricultural chemicals waste water in above-mentioned adsorption tanks, based on every Agricultural chemicals waste water is risen, the dosage of activated coke is 0.5-1.0g, such as can be 0.5g, 0.6g, 0.7g, 0.8g, 0.9g, 1.0g. Significantly affected inventors have found that the dosage of activated coke has the removal effect of COD in agricultural chemicals waste water, the removal rate of COD with The increase of dosage and be gradually increased, when activated coke increase to it is a certain amount of, can be by the pollution of activated coke Adsorption in waste water Object has been adsorbed, and remaining COD is constituted by being difficult to by the substance that activated coke is adsorbed in waste water, therefore removal rate finally tends to be steady It is fixed.Therefore, the removal rate of COD is held essentially constant under high dosage, is continued growing activated coke dosage and is not simply failed to further COD is removed, and wastes adsorbent, increases operating cost.Can not only it be guaranteed using the activated coke dosage of the application as a result, Higher COD removal rate in agricultural chemicals waste water reaches " urban wastewater treatment firm dirt so that the COD of waste water is less than 50mg/L after absorption Contaminate object discharge standard " level-one A standard, and the processing cost of agricultural chemicals waste water can be significantly reduced.
Further, in order to improve the removal rate of COD in agricultural chemicals waste water in the step, the powder activity used in the step Burnt partial size is not more than 200 mesh, adsorption time 10-30min, for example, 10min, 12min, 15min, 17min, 20min, 22min, 25min, 27min, 30min, preferably 20min.It should be noted that the adsorption time refers to that pesticide is useless in above-mentioned adsorption tanks Water enters the time that adsorption zone enters to it through adsorption zone lower ending opening between overflow area.
Secondly, being regenerated using Fenton oxidation method to activated coke of giving up after being adsorbed in above-mentioned steps.Inventors have found that using Fenton oxidation method carries out regeneration treatment to activated coke of giving up after absorption, and the activated coke regeneration rate that not only gives up is high, and can substantially reduce Fenton The dosage of reagent, save the cost, and mesoporous prosperity also makes it easier to regenerate in activated coke, recycles, and reduces absorbing process Operating cost.And waste water is directly handled using Fenton oxidation method in the prior art, although its can efficient oxidation degradation of organic substances, Required amount of reagent is big, at high cost, and a large amount of iron containing sludges can be generated after the completion of aoxidizing, and processing is difficult.And the application novelty Activated coke of giving up after absorption is regenerated using Fenton oxidation method, not only realizes and the organic matter being enriched in activated coke is collected In quickly handle, the regeneration rate of useless activated coke is improved while significantly reducing Fenton reagent usage amount, and because activated coke itself has There is flourishing central hole structure, so that useless activated coke has good regeneration effect, the recycling of regeneration activity coke is realized, into one Step reduces reagent cost.
According to one embodiment of present invention, ferrous sulfate is 0.74-1.10mmol/L in Fenton oxidation method agents useful for same, Such as can for 0.74mmol/L, 0.82mmol/L, 0.87mmol/L, 0.92mmol/L, 0.95mmol/L, 0.99mmol/L, 1.02mmol/L, 1.05mmol/L, 1.07mmol/L, 1.10mmol/L, the concentration of hydrogen peroxide are 100-150m/L, such as can Think 100mg/L, 102mg/L, 105mg/L, 107mg/L, 109mg/L, 112mg/L, 115mg/L, 117mg/L, 119mg/L, 122mg/L、125mg/L、127mg/L、129mg/L、132mg/L、135mg/L、137mg/L、139mg/L、141mg/L、 143mg/L, 145mg/L, 147mg/L, 150mg/L, and the pH of Fenton oxidation method agents useful for same is 3-4, for example, can for 3, 3.1,3.2,3.3,3.4,3.5,3.6,3.7,3.8,3.9,4.0.Inventors have found that if when the pH of agents useful for same is too low, solution Middle H+Fe can excessively be destroyed2+And Fe3+Between balance, lead to Fe3+Fe cannot be successfully reduced to2+, the generation of OH is influenced, To reduce Fenton's reaction and regenerated efficiency;On the other hand, excessively high pH can then inhibit the generation of OH, promote Fe2+Conversion For the hydroxide precipitating of iron or more complicated compound.The reagent of the application is used as a result, can improve useless activated coke Reagent ferrous ions are avoided to precipitate or be converted into other compounds and lose while regeneration efficiency.
Further, in order to improve absorption after give up activated coke regeneration efficiency, use the reproduction time of Fenton oxidation method for 20-40mim, for example, 20min, 22min, 25min, 27min, 29min, 30min, 33min, 35min, 37min, 39min, 40min, preferably 30min.And activated coke is through 6 absorption and after regeneration is used alternatingly, the regeneration activity obtained after the 6th regeneration Burnt regeneration rate is not less than 64%, and the specific surface area of the regeneration activity coke, Kong Rong, aperture are that fresh activity is burnt respectively 91%, 92%, 97%.
It is adsorbed finally, the return adsorption tanks of regeneration activity coke obtained in above-mentioned steps are mixed with agricultural chemicals waste water.Tool Body, it mixes and adsorbs with agricultural chemicals waste water by returning to regeneration activity coke obtained in above-mentioned steps in adsorption tanks, it can be with Recycling for activated coke is realized while reducing agricultural chemicals waste water processing cost.
According to an embodiment of the invention, powder activity coke absorption of the invention-Fenton oxidation regeneration advanced treating pesticide is useless The method of water at least has one of following advantages:
1, the powder activity coke absorption of the embodiment of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, it is first Secondary that activated coke is used for agricultural chemicals waste water advanced treating, discovery activated coke can effectively remove the hardly degraded organic substance in agricultural chemicals waste water, Water outlet COD is cut down, its stably reaching standard is made.
2, the powder activity coke absorption of the embodiment of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, can The regeneration of useless activated coke is carried out using Fenton oxidation method, regeneration rate is relatively high and stable.
3, the powder activity coke absorption of the embodiment of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, behaviour Make simple and reliable, operating cost is low, has good environmental benefit and economic benefit, is solving the problems, such as advanced treatment of industrial waste water It is upper that there is important application value.
Powder activity coke absorption according to an embodiment of the present invention-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method, For agricultural chemicals waste water bio-chemical effluent water quality characteristics, use powder activity Jiaozhuo that raw material sources are wide, cheap for adsorbent, Activated coke has flourishing central hole structure, efficiently can remove aromatic compound and macromolecular straight chain chemical combination in water removal by quick adsorption Object significantly reduces water outlet COD, reaches " urban wastewater treatment firm pollutant emission standard " level-one A standard.Meanwhile it will inhale Attached useless activated coke uses the regeneration treatment of Fenton oxidation method, and the activated coke regeneration rate that not only gives up is high, and can substantially reduce Fenton reagent Dosage, save the cost, and mesoporous prosperity also makes it easier to regenerate in activated coke, recycles reduces absorbing process operation Cost.Have the characteristics that adsorb quick, at low cost, Yi Zaisheng using method processing agricultural chemicals waste water of the invention as a result, makes this hair It is bright to be had a good application prospect in agricultural chemicals waste water advanced treating field.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe Property, without limiting the invention in any way.
Embodiment 1
Using adsorption tanks shown in FIG. 1, powder activity coke and agricultural chemicals waste water are put into its adsorption zone, agriculture from absorption tank top The COD of medicine waste water is 67-110mg/L, and the partial size of powder activity coke is not more than 200 mesh, is based on every liter of agricultural chemicals waste water, activated coke Dosage is 0.5g, activated coke and agricultural chemicals waste water in adsorption zone progress mixing and absorption, adsorption time 10min, obtained useless work Property coke from absorption pot bottom discharge, after obtained absorption, waste water is discharged from the overflow port of overflow area upper end side wall, give up after the absorption The COD (being detected using multiparameter water quality analyzer) of water is less than 50mg/L, and waste water reaches " urban wastewater treatment firm pollution after absorption Object discharge standard " level-one A standard, the COD of the water inlet agricultural chemicals waste water at the top of adsorption tanks obtains with overflow port water outlet Absorption after agricultural chemicals waste water COD relational graph it is as shown in Figure 2;
Regeneration 30min is carried out to useless activated coke using Fenton oxidation method, obtains regeneration activity coke, and regeneration activity coke is returned It returns in adsorption tanks and carries out mixing and absorption with agricultural chemicals waste water, wherein ferrous sulfate concentration is in Fenton oxidation method agents useful for same 0.74mmol/L, the concentration of hydrogen peroxide is 100mg/L, and the pH of the reagent is 3.Regeneration activity is burnt after regeneration treatment for the first time Regeneration rate be more than 98%, and through 6 times absorption and regeneration alternate treatment after, the regeneration rate of the 6th obtained regeneration activity coke Not less than 64%.
Embodiment 2
Using adsorption tanks shown in FIG. 1, powder activity coke and agricultural chemicals waste water are put into its adsorption zone, agriculture from absorption tank top The COD of medicine waste water is 110-140mg/L, and the partial size of powder activity coke is not more than 200 mesh, is based on every liter of agricultural chemicals waste water, activated coke Dosage be that 0.6g, activated coke and agricultural chemicals waste water in adsorption zone carry out mixing and absorption, adsorption time 20min, what is obtained is useless Activated coke is from absorption pot bottom discharge, and waste water is discharged from the overflow port of overflow area upper end side wall after obtained absorption, after the absorption The COD (being detected using multiparameter water quality analyzer) of waste water is less than 50mg/L, and waste water reaches " urban wastewater treatment firm dirt after absorption Contaminate object discharge standard " level-one A standard, the COD of the water inlet agricultural chemicals waste water at the top of adsorption tanks obtains with overflow port water outlet The relational graph of the COD of agricultural chemicals waste water is as shown in Figure 3 after the absorption arrived;
Regeneration 30min is carried out to useless activated coke using Fenton oxidation method, obtains regeneration activity coke, and regeneration activity coke is returned It returns in adsorption tanks and carries out mixing and absorption with agricultural chemicals waste water, wherein ferrous sulfate concentration is in Fenton oxidation method agents useful for same 0.99mmol/L, the concentration of hydrogen peroxide is 135mg/L, and the pH of the reagent is 3.5.Regeneration activity after regeneration treatment for the first time Burnt regeneration rate is more than 98%, and after 6 absorption and regeneration alternate treatment, the regeneration of the 6th obtained regeneration activity coke Rate is not less than 64%.
Embodiment 3
Using adsorption tanks shown in FIG. 1, powder activity coke and agricultural chemicals waste water are put into its adsorption zone, agriculture from absorption tank top The COD of medicine waste water is 140-180mg/L, and the partial size of powder activity coke is not more than 200 mesh, is based on every liter of agricultural chemicals waste water, activated coke Dosage be that 1.0g, activated coke and agricultural chemicals waste water in adsorption zone carry out mixing and absorption, adsorption time 30min, what is obtained is useless Activated coke is from absorption pot bottom discharge, and waste water is discharged from the overflow port of overflow area upper end side wall after obtained absorption, after the absorption The COD (being detected using multiparameter water quality analyzer) of waste water is less than 50mg/L, and waste water reaches " urban wastewater treatment firm dirt after absorption Contaminate object discharge standard " level-one A standard, the COD of the water inlet agricultural chemicals waste water at the top of adsorption tanks obtains with overflow port water outlet The relational graph of the COD of agricultural chemicals waste water is as shown in Figure 4 after the absorption arrived;
Regeneration 30min is carried out to useless activated coke using Fenton oxidation method, obtains regeneration activity coke, and regeneration activity coke is returned It returns in adsorption tanks and carries out mixing and absorption with agricultural chemicals waste water, wherein ferrous sulfate concentration is in Fenton oxidation method agents useful for same 1.10mmol/L, the concentration of hydrogen peroxide is 150mg/L, and the pH of the reagent is 4.The activated coke absorption regeneration alternate treatment 6 regeneration rates as shown in figure 5, activated coke regeneration rate is more than 98% for the first time, and after 6 absorption and regeneration alternate treatment, The regeneration rate of 6th obtained regeneration activity coke is not less than 64%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It is that must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples Combination and combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (9)

1. a kind of powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method characterized by comprising
(1) powder activity coke is mixed with agricultural chemicals waste water and is adsorbed, so as to waste water after give up after being adsorbed activated coke and absorption;
(2) activated coke of giving up after the absorption is regenerated using Fenton oxidation method.
2. method according to claim 1, which is characterized in that in step (1), the agricultural chemicals waste water COD is 67-180mg/ L。
3. method according to claim 1 or claim 2, which is characterized in that in step (1), the partial size of the powder activity coke is not Greater than 200 mesh.
4. method according to claim 1, which is characterized in that in step (1), be based on 1 liter of agricultural chemicals waste water, the powder The dosage of last activated coke is 0.5-1.0g.
5. according to claim 1 or 4 the methods, which is characterized in that in step (1), the adsorption time is 10-30min.
6. method according to claim 1, which is characterized in that in step (1), the COD of waste water is lower than after the absorption 50mg/L。
7. method according to claim 1, which is characterized in that in step (2), sulphur in the Fenton oxidation method agents useful for same Sour ferrous iron concentration is 0.74-1.10mmol/L, and the concentration of hydrogen peroxide is 100-150m/L, and the pH value of the reagent is 3-4.
8. according to claim 1 or 7 the methods, which is characterized in that in step (2), when the regeneration of the Fenton oxidation method Between be 20-40min.
9. method according to claim 1, which is characterized in that further comprise: the regeneration activity coke that step (2) obtains is returned Step (1) is gone back to mix and adsorbed with the agricultural chemicals waste water.
CN201910280289.XA 2019-04-09 2019-04-09 Powder activity coke absorption-Fenton oxidation regeneration advanced treating agricultural chemicals waste water method Pending CN110040807A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110980987A (en) * 2019-12-09 2020-04-10 北京国电富通科技发展有限责任公司 Powder adsorption system with enrichment liquid phase regeneration capacity

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