CN102992566A - Method for disposing sludge - Google Patents
Method for disposing sludge Download PDFInfo
- Publication number
- CN102992566A CN102992566A CN201210562237XA CN201210562237A CN102992566A CN 102992566 A CN102992566 A CN 102992566A CN 201210562237X A CN201210562237X A CN 201210562237XA CN 201210562237 A CN201210562237 A CN 201210562237A CN 102992566 A CN102992566 A CN 102992566A
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- mud
- sludge
- flocculation agent
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- carry out
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 238000005189 flocculation Methods 0.000 claims abstract description 57
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 52
- 230000003647 oxidation Effects 0.000 claims abstract description 50
- 238000006479 redox reaction Methods 0.000 claims abstract description 42
- 238000005345 coagulation Methods 0.000 claims abstract description 17
- 230000015271 coagulation Effects 0.000 claims abstract description 17
- 125000002091 cationic group Chemical group 0.000 claims abstract description 15
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 59
- 230000016615 flocculation Effects 0.000 claims description 56
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 28
- 239000002594 sorbent Substances 0.000 claims description 18
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 229910000765 intermetallic Inorganic materials 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010451 perlite Substances 0.000 claims description 4
- 235000019362 perlite Nutrition 0.000 claims description 4
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 3
- 239000004113 Sepiolite Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 150000001721 carbon Chemical class 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 235000019355 sepiolite Nutrition 0.000 claims description 3
- 229910052624 sepiolite Inorganic materials 0.000 claims description 3
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical group CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 abstract description 22
- 238000002156 mixing Methods 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 8
- 230000008021 deposition Effects 0.000 abstract description 6
- 230000001590 oxidative effect Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 150000004676 glycans Chemical class 0.000 abstract description 5
- 229920001282 polysaccharide Polymers 0.000 abstract description 5
- 239000005017 polysaccharide Substances 0.000 abstract description 5
- 102000004169 proteins and genes Human genes 0.000 abstract description 5
- 108090000623 proteins and genes Proteins 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 3
- 239000007800 oxidant agent Substances 0.000 abstract 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 17
- 239000000203 mixture Substances 0.000 description 16
- 229920000742 Cotton Polymers 0.000 description 15
- 239000000706 filtrate Substances 0.000 description 14
- 238000001914 filtration Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 239000010865 sewage Substances 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 10
- 239000012467 final product Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 239000000047 product Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 150000003384 small molecules Chemical class 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- -1 hydroxyl radical free radical Chemical class 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002156 adsorbate Substances 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001510 metal chloride Inorganic materials 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention provides a method for disposing sludge. The method comprises the following steps of: mixing sludge to be disposed with an oxidation guide catalyst and an oxidant to carry out redox reaction; and mixing the redox reaction product with a flocculant to carry out coagulation, wherein the flocculant comprises the following components: 0-60wt% of FeCl3, 37-95wt% of aluminium polychlorid and 3-10wt% of cationic polyacrylamide. The method has the beneficial effects that firstly the sludge to be disposed and the oxidant carry out redox reaction in the presence of the oxidation guide catalyst and then the obtained reaction product is mixed with the flocculant to carry out coagulation; the flocculant adopted in the method is beneficial to deposition of small molecular substances in the obtained reaction product to enable the sludge flocs to undergo re-flocculation, thus increasing the volumes of the sludge flocs; and regenerated sludge flocs are conductive to reducing the specific resistance of the sludge as the proteins, polysaccharides and the like in the sludge are reduced.
Description
Technical field
The present invention relates to environmental protection technical field, relate in particular to a kind of method of lignin-sludge.
Background technology
Mud is the organic matter that sewage work produces in sewage treatment process, the residues such as offscum of the sedimentable matters such as microbial bacteria micelle and sewage surface flotation, wherein contain a large amount of pathogenic bacterias, parasite, cure the disease microorganism dioxin and arsenic, copper, mercury, the toxic heavy metals such as chromium, even the poisonous of the hard degradations such as radionuclide arranged, objectionable impurities, if arbitrarily throw aside hill farmland or ground lack of standardization landfill, will cause huge potential threat to ecotope, the colloid of mud is inhaled bag water characteristic simultaneously, also can cause moisture percentage in sewage sludge high, volume is large, bring difficulty for stacking and transportation etc., the mud that the treatment plant that therefore how properly further to dispose of sewage produces more and more becomes the content of those skilled in the art's research.
Because the bacterium colloidal polymer wetting ability of mud is strong, cause dewatering rate difficult, conventional dehydrated sludge is bulky, brings great difficulty for the mud transportation of dispatching from the factory.If the town sewage plant ﹠ Mud is improper or it is lack of standardization to process disposal, will cause series of environmental problems.As because high-moisture percentage causes a large amount of harmful penetrating fluids during landfill, " blowout " phenomenon can appear when serious, and this will cause new potential threat to ecotope.Therefore ﹠ Mud is not only thorny problem of environmental area, also is one of current hot subject of field of Environment Protection.At present the treatment process of excess sludge is mainly contained sanitary landfill, land comprehensive utilization, thermal treatment, sludge composting, ultrasonic wave and clear up mud method etc., for the ease of transportation, storage, stacking and the utilization of mud, before ultimate disposal, all require to carry out sludge dewatering.Sludge specific resistance is one of important factor that affects the ﹠ Mud technical scheme, the resistance the when mud that it is defined as unit mass filters under certain pressure on the unit filtration area.In general, resistivity is less than 1 * 10
11The mud of m/kg is easy to dehydration, greater than 1 * 10
13The mud of m/kg is difficult to dehydration.Sludge specific resistance is the composite target of expression sludge filtration characteristic, and sludge specific resistance is larger, and strainability is poorer.
In order to reduce the resistivity of mud, prior art discloses multiple technologies, be the method that the Chinese patent of CN102145974A discloses lignin-sludge under a kind of normality such as publication number, its method is to add oxidation directed agents and conditioning agent CaO in mud, stir, and pass into ozone, then add the coagulation agent, at last with sludge press filtration.Although the method that this patent provides can be decomposed the organic matter in the mud, the mud that obtains still has larger resistivity; Publication number is the method that the Chinese patent of CN101717174B discloses a kind for the treatment of sludge of sewage plant by controllable wet oxidation coagulation method for another example, its method is to add the oxidation initiator in mud, stirs, and passes into oxygenant, then add the coagulation agent, at last with sludge press filtration.This sludge disposal technology be with carbon dust as the oxidation initiator, add ozone as oxygenant, its oxidation rupture of membranes poor effect, the resistivity of the mud that obtains still is unfavorable for the carrying out of follow-up dehydration.
Summary of the invention
The object of the present invention is to provide a kind of method of lignin-sludge, adopt the mud after method provided by the invention is processed to have lower resistivity, so that the mud after processing is easy to dehydration.
The invention provides a kind of method of lignin-sludge, may further comprise the steps:
Pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction;
The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises following component:
The FeCl of 0wt% ~ 60wt%
3
The polymerize aluminum chloride of 37wt% ~ 95wt%;
The cationic polyacrylamide of 3wt%10wt%.
Preferably, described flocculation agent comprises the FeCl of 5wt% ~ 55wt%
3
Preferably, described flocculation agent comprises the polymerize aluminum chloride of 45wt% ~ 90wt%.
Preferably, described flocculation agent comprises the cationic polyacrylamide of 3wt% ~ 8wt%.
Preferably, the mass ratio of the butt of described flocculation agent and described pending mud is (0.05% ~ 5%): 1.
Preferably, described oxidation guiding catalyzer comprises following component:
The metallic compound of 5wt% ~ 45wt%;
The sorbent material of 55wt% ~ 95wt%.
Preferably, described metallic compound is one or both in metal-salt and the metal oxide.
Preferably, the metal in the described metallic compound is one or several among Fe, Mn, Al, V and the Ti.
Preferably, described sorbent material is one or more in carbon class sorbent material, sepiolite powder, diatomite, colliery powder, flyash, perlite powder, bentonite in powder, volcano ashes and the kaolin.
Preferably, the mass ratio of the butt of described oxidation guiding catalyzer and described pending mud is (3% ~ 8%): 1.
Preferably, described oxygenant is hydrogen peroxide or ozone.
The invention provides a kind of method of lignin-sludge, may further comprise the steps: pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction; The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises the FeCl of following component: 0wt% ~ 60wt%
3The polymerize aluminum chloride of 37wt% ~ 95wt%; The cationic polyacrylamide of 3wt% ~ 10wt%.The present invention at first carries out redox reaction with oxygenant with pending mud under the effect of oxidation guiding catalyzer, then the reaction product that obtains is mixed with flocculation agent and carry out the coagulation processing, the flocculation agent that the present invention adopts comprises the FeCl of following component: 0wt% ~ 60wt%
3, the polymerize aluminum chloride of 37wt% ~ 95wt% and the cationic polyacrylamide of 3wt%10wt%, small-molecule substance deposition in the redox reaction product that this flocculation agent is conducive to obtain, flocculation agent makes mud flco generation reflocculation, thereby increase the volume of mud flco, newly-generated mud flco is because minimizings such as the protein in the mud, polysaccharide, reduce the resistivity of mud, be beneficial to the carrying out of the follow-up dewatering process of mud.Experimental result shows, adopting the resistivity of the mud that method provided by the invention obtains is 0.10 * 10
12M/kg ~ 0.4 * 10
12M/kg.
Embodiment
The invention provides a kind of method of lignin-sludge, may further comprise the steps:
Pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction;
The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises following component:
The FeCl of 0wt% ~ 60wt%
3
The polymerize aluminum chloride of 37wt% ~ 95wt%;
The cationic polyacrylamide of 3wt%10wt%.
Method provided by the invention is at first reacted pending mud under the effect of oxidation guiding catalyzer with oxygenant, then the reaction product that obtains is mixed with flocculation agent and carry out the coagulation processing, finishes the treating processes to mud.The flocculation agent that the present invention adopts comprises the FeCl of following component: 0wt% ~ 60wt%
3The polymerize aluminum chloride of 37wt% ~ 95wt%; The cationic polyacrylamide of 3wt% ~ 10wt%.The flocculation agent that the present invention adopts is conducive to the deposition of reaction product small molecular material, has reduced the resistivity of the mud that obtains, is conducive to the carrying out of follow-up dewatering process.
The present invention at first mixes pending mud with oxidation guiding catalyzer and oxygenant, carry out redox reaction.The present invention does not have special restriction to the source of described pending mud, adopts mud well known to those skilled in the art to get final product.As, method provided by the invention can be processed excess sludge, also can be used for processing mud.In the present invention, described excess sludge is that the sewage process is processed the mud that produces, and comprises scum silica frost, microorganism cenobium, is the secondary product after the biochemical treatment of Sewage Plant sewage; Described mud is the mud that lake, channel deposit obtain;
The order of addition(of ingredients) of the present invention during to described pending mud and oxygenant and oxidation guiding catalyst mix does not have special restriction, adopts order of addition(of ingredients) well known to those skilled in the art to get final product.The present invention preferably at first adds oxidation guiding catalyzer in the pending mud, again under the condition that stirs to wherein adding oxygenant, carry out redox reaction.In the present invention, described oxidation guiding catalyzer comprises following component:
The metallic compound of 5wt% ~ 45wt%;
The sorbent material of 55wt% ~ 95wt%.
In the present invention, described oxidation guiding catalyzer preferably includes the metallic compound into 5wt% ~ 45wt%, and more preferably 10wt% ~ 30wt% most preferably is 15wt% ~ 25wt%, the most is preferably 18wt% ~ 22wt%.In the present invention, described metallic compound is one or both in metal-salt and the metal oxide; In the present invention, described metal-salt can be the inorganic salt of metal, also can be the organic salt of metal, be preferably in metal formate, metal acetate, metal chloride salt, metal sulfate and the metal nitrate one or more, more preferably one or more in metal formate, metal acetate and the metal chloride salt; Metal in the described metallic compound is preferably one or several among Fe, Mn, Al, V and the Ti, and one or more among Fe, Al, Ti and the V more preferably most preferably are among Fe, Ti and the Al one or more;
In the present invention, described metal-salt solidification effect is good, the hydroxyl radical free radical that it can generate with ozone reaction, the hydroxyl radical free radical that obtains makes Organic Sludge microbial film and cellularstructure generation redox processes, break membrane structure, generate micromolecular organic matter, and organic-NH ,-SH ,-chemical bonds such as OH are easy to the heavy metal ion Cd with the excess sludge surface
2+, Cu
2+, Zn
2+, Pb
2+, Ni
2+, Cr
3+, AsO
+Plasma formation inner complex is wrapped in the dewatered sludge after mechanical mummification press filtration heavy metal ion, thereby can improve the environmental protection to sludge treatment;
In the present invention, described oxidation guiding catalyzer preferably includes the sorbent material of 55wt% ~ 95wt%, and more preferably 70wt% ~ 90wt% most preferably is 75wt% ~ 85wt%, the most is preferably 78wt% ~ 82wt%.In the present invention, sorbent material has large specific surface, suitable pore structure and surface tissue, and adsorbate there is strong adsorptive power, the transfer transport that is conducive to the interface, formation is to the hydroxy radical qiao of mud micella oxidation rupture of membranes, and sorbent material generally not with adsorbate and medium generation chemical reaction; Easily manufactured, easily regeneration; Good physical strength etc. is arranged.Therefore, in the present invention, sorbent material can obtain the oxygenant of high-energy state in gas or the liquid effectively, finishes curing, and the interface transfer transport of solid-liquid interface is realized the micella rupture of membranes to mud, and discharging parcel water becomes flow gap water.Raising is to the efficient of the processing mummification of mud.In the present invention, described sorbent material is preferably one or several in carbon class sorbent material, sepiolite powder, diatomite, colliery powder, flyash, perlite powder, bentonite in powder, volcano ashes and the kaolin, one or more in carbon dust, charcoal, gac, flyash, diatomite, perlite powder, the kaolin more preferably most preferably are in carbon dust, gac, the flyash one or more; The order number of the granularity of described sorbent material is preferably more than 100 orders, more preferably more than 150 orders.Carbon dust class sorbent material, its loading capacity is larger, and is remarkable to the absorption property effect of solid particulate matter in the mud.Wherein, activity charcoal powder is the meal that the carbon raw materials such as charcoal, shell, coal are made after charing, activation, and activity charcoal powder contains a lot of pore structures, and it has excellent adsorptive power, dimension adopts activity charcoal powder as the sorbent material more remarkable effect of sludge treatment, and water separation capability is stronger.And when adopting multiple sorbent material simultaneously as the component of oxidation guiding catalyzer, performance that can balanced various sorbent materials is so that comprehensive absorption property is better.
The present invention does not have special restriction to the preparation method of described oxidation guiding catalyzer, adopts the technical scheme of composition preparation well known to those skilled in the art to get final product, and after the present invention preferably mixes said components, can obtain oxidation guiding catalyzer.
After obtaining oxidation guiding catalyzer, the present invention preferentially joins described oxidation guiding catalyzer in the pending mud, the add-on of described oxidation guiding catalyzer is different and different according to the kind of pending mud, in the present invention, described pending mud is preferably excess sludge or mud.When described pending mud was excess sludge, the mass ratio of butt was (3% ~ 8%) in described oxidation guiding catalyzer and the described excess sludge: 1, more preferably (4% ~ 7%): 1; When described pending mud was mud, the mass ratio of butt was (0.1% ~ 0.5%) in described oxidation guiding catalyzer and the described mud: 1, more preferably (0.2% ~ 0.4%): 1; In the present invention, described butt is the solid matter that drying sludge to constant weight obtains, be preferably under 103 ℃ ~ 105 ℃ the temperature and be dried to the solid matter that constant weight obtains, the present invention does not have special restriction to the equipment of described drying, adopt drying plant well known to those skilled in the art to get final product, as adopting baking oven;
After obtaining the mixture of pending mud and oxidation guiding catalyzer, the present invention preferably under the condition that stirs to wherein adding oxygenant, carry out redox reaction.In the present invention, described oxygenant is preferably hydrogen peroxide or ozone, more preferably hydrogen peroxide or ozone.The present invention does not have special restriction to the mass concentration of described hydrogen peroxide, adopts the hydrogen peroxide as oxygenant well known to those skilled in the art to get final product; The present invention does not have special restriction to the source of described ozone, adopts the technical scheme of preparation ozone well known to those skilled in the art to get final product, and prepares ozone required for the present invention as adopting ozonizer; The present invention does not have special restriction to described ozonizer, adopts ozonizer well known to those skilled in the art to get final product;
In the present invention, the mass concentration of described hydrogen peroxide is preferably 30% ~ 60%, and more preferably 35% ~ 55%; The mass ratio that described oxygenant accounts for butt in the described pending mud is preferably (0.1 ~ 1.0) g/kg, more preferably (0.1 ~ 0.5) g/kg; The present invention does not have special restriction to the method for described stirring, adopts the technical scheme of stirring well known to those skilled in the art to get final product; In the present invention, the temperature of described oxidizing reaction is preferably room temperature; The time of described oxidizing reaction is different and different according to the quality of pending mud, the quality of pending mud is more, the time of oxidizing reaction also will prolong thereupon, oxidizing reaction can be carried out more fully and thoroughly, the present invention does not have special restriction to this, adopt time-align technique scheme well known to those skilled in the art to get final product.
After finishing above-mentioned redox reaction, the present invention mixes the product of the redox reaction that obtains with flocculation agent, carries out the coagulation reaction, and in the present invention, described flocculation agent comprises following component:
The FeCl of 0wt% ~ 60wt%
3
The polymerize aluminum chloride of 37wt% ~ 95wt%;
The cationic polyacrylamide of 3wt%10wt%.
The flocculation agent that the present invention adopts comprises the FeCl of 0wt% ~ 60wt%
3, be preferably 5wt% ~ 55wt%, more preferably 10wt% ~ 50wt%; Described flocculation agent comprises the polymerize aluminum chloride (PAC) of 37wt% ~ 95wt%, is preferably 45wt% ~ 90wt%, more preferably 50wt% ~ 80wt%; Described flocculation agent comprises the cationic polyacrylamide (CPAM) of 3wt% ~ 10wt%, is preferably 5wt% ~ 8wt%; The flocculation agent that the present invention adopts can better react with the small-molecule substance in the reaction product, and the generation inner complex settles down the small-molecule substance in the mud, has reduced the resistivity of mud, is conducive to the carrying out of follow-up dehydration.
In the present invention, the butt mass ratio of described flocculation agent and described pending mud is preferably (0.05% ~ 5%): 1, more preferably (0.075% ~ 4%): 1;
The present invention does not have special restriction to the temperature that described flocculation agent mixes with the oxidation reaction product of pending mud, preferably at room temperature carries out.The present invention preferably stirs when the oxidation reaction product with pending mud mixes with flocculation agent, and the present invention does not have special restriction to the method for described stirring, adopts the technical scheme of stirring well known to those skilled in the art to get final product.
After obtaining the mixture of redox reaction product and flocculation agent, the present invention wads a quilt with cotton the mixture that obtains to sink and processes, the present invention does not have special restriction to the heavy method of processing of described wadding, stir having added the mixture that obtains behind the flocculation agent, so that flocculation agent and redox reaction product fully react, settling velocity and the sinkability of mud have been accelerated, flocculation agent makes mud flco generation reflocculation, thereby increase the volume of mud flco, newly-generated mud flco is owing to minimizings such as the protein in the mud, polysaccharide, so resistivity obviously reduces; In addition, the increase of newly-generated mud flco particle diameter can cause the easier fragmentation of flco, thereby more is conducive to the filtration in later stage.
The invention provides a kind of method of lignin-sludge, may further comprise the steps: pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction; The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises the FeCl of following component: 0wt% ~ 60wt%
3The polymerize aluminum chloride of 37wt% ~ 95wt%; The cationic polyacrylamide of 3wt% ~ 10wt%.The present invention at first carries out redox reaction with oxygenant with pending mud under the effect of oxidation guiding catalyzer, then the reaction product that obtains is mixed with flocculation agent and carry out the coagulation processing, the flocculation agent that the present invention adopts comprises the FeCl of following component: 0wt% ~ 60wt%
3, the polymerize aluminum chloride of 37wt% ~ 95wt% and the cationic polyacrylamide of 3wt%10wt%, small-molecule substance deposition in the redox reaction product that the flocculation agent that the present invention adopts is conducive to obtain, flocculation agent makes mud flco generation reflocculation, thereby increase the volume of mud flco, newly-generated mud flco is because organic micellas such as the protein in the mud, polysaccharide discharge parcel water behind rupture of membranes, in the coagulation flocculation, form hard-packed mud polymkeric substance, reduce the resistivity of mud, be beneficial to the carrying out of the follow-up dewatering process of mud.Experimental result shows, adopting the resistivity of the mud that method provided by the invention obtains is 0.10 * 10
12M/kg ~ 0.4 * 10
12M/kg.Be conducive to that follow-up (the lower press filtration of 0.6MPa ~ 0.8MPa), the 1.5MPa squeezing obtains the dewatered sludge water ratio below 50% in normality.
In order to further specify the present invention, below in conjunction with embodiment the method for lignin-sludge provided by the invention is described in detail, but they can not be interpreted as restriction to protection domain of the present invention.
The secondary product of excess sludge after from the biochemical treatment of Sewage Plant sewage in following examples; Mud is the lake or shouts the mud that deposition obtains.
Embodiment 1
With mass ratio be 80:20 with carbon dust and FeCl
3Mix, obtain oxidation guiding catalyzer after mixing;
In the excess sludge that contains the 1.0kg butt, add the oxidation guiding catalyzer that the 50g present embodiment obtains, after the stirring, to wherein passing into 0.5g ozone, carry out redox reaction again; In the redox reaction product that obtains, add the FeCl that 0.5g contains 45wt%
3, the PAC of 45wt% and 10wt% the flocculation agent of CPAM, it is heavy to wad a quilt with cotton after fully mixing, and obtains solid matter and filtrate through press filtration.
It is 0.080 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～1.0 * 10
12M/kg;
It is 6.5 that the present invention detects the pH value that obtains filtrate.
Embodiment 2
Be that activated carbon powder, flyash, ironic formiate and the al formate of 30:35:10:15 mixes with mass ratio, mix and obtain oxidation guiding catalyzer;
In the excess sludge that contains the 10kg butt, add the oxidation guiding catalyzer that the 0.35kg present embodiment prepares, after the stirring, to wherein passing into 3.5g ozone, carry out redox reaction again; In the redox reaction product that obtains, add the FeCl that 10g contains 50wt%
3, the PAC of 45wt% and 5wt% the flocculation agent of CPAM, it is heavy to wad a quilt with cotton after fully mixing, and obtains solid matter and filtrate through press filtration.
It is 0.090 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～1.2 * 10
12M/kg;
It is 6.8 that the present invention detects the pH value that obtains filtrate.
Embodiment 3
Be 82:7:7 carbon dust, FeCl with mass ratio
3Mix with ironic acetate, obtain oxidation guiding catalyzer after mixing;
In the excess sludge that contains the 50kg butt, add the oxidation guiding catalyzer that the 3.25kg present embodiment prepares, after the stirring, to wherein passing into 22.5g ozone, carry out redox reaction again; Then in the redox reaction product that obtains, add the FeCl that 1kg contains 55wt%
3, the PAC of 35wt% and 10wt% the flocculation agent of CPAM, it is heavy to wad a quilt with cotton after fully mixing, and obtains solid matter and filtrate through press filtration.
It is 0.075 * 10 that the present invention detects the heavy resistivity that obtains mud that obtains wadding a quilt with cotton
12M/kg～1.05 * 10
12M/kg;
It is 6.5 that the present invention detects the pH value that obtains filtrate.
Embodiment 4
Be gac and the FeCl of 85:15 with mass ratio
3Mix, obtain oxidation guiding catalyzer after mixing;
In the excess sludge that contains 80kg, add the oxidation guiding catalyzer that the 6kg present embodiment prepares, after the stirring, to wherein passing into 60g ozone, carry out redox reaction again; Then add 3kg in the redox reaction product that obtains and contain the flocculation agent of the CPAM of the PAC of FeCl3,35wt% of 45wt% and 20wt%, fully mix heavy processing of wadding a quilt with cotton, obtain solid matter and filtrate through press filtration.
It is 0.1 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～0.4 * 10
12M/kg;
It is 7.0 that the present invention detects the pH value that obtains filtrate.
Embodiment 5
Be carbon dust and the FeCl of 78:22 with mass ratio
3Mix, obtain oxidation guiding catalyzer after mixing;
In the mud that contains the 100kg butt, add the oxidation guiding catalyzer that the 0.3kg present embodiment obtains, after the stirring, to wherein passing into 50g ozone, carry out redox reaction again; Then in the redox reaction product that obtains, add the FeCl that 1.2kg contains 45wt%
3, the PAC of 45wt% and 10wt% the flocculation agent of CPAM, mix heavy processing of wadding a quilt with cotton, obtain solid matter and filtrate through press filtration.
It is 0.080 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～1.5 * 10
12The mud of m/kg;
It is 7.5 that the present invention detects the pH value that obtains filtrate.
Embodiment 6
Be that property powdered carbon, flyash, ironic formiate and the al formate of 40:40:10:10 mixes with mass ratio, obtain oxidation guiding catalyzer after mixing;
In the mud that contains the 60kg butt, add the oxidation guiding catalyzer that the 0.3kg present embodiment obtains, after the stirring, to wherein passing into 48g ozone, carry out redox reaction again; Then in the product of the redox reaction that obtains, add the FeCl that 0.5kg contains 55wt%
3, the PAC of 40wt% and 5wt% the flocculation agent of CPAM, fully mix heavy processing of wadding a quilt with cotton, obtain solid matter and filtrate through press filtration.
It is 0.100 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～1.35 * 10
12M/kg;
It is 7.8 that the present invention detects the pH value that obtains filtrate.
Embodiment 7
Be carbon dust and the FeCl of 85:15 with mass ratio
3Mix, obtain oxidation guiding catalyzer after mixing;
In the mud that contains the 90kg butt, add the oxidation guiding catalyzer that the 0.09kg present embodiment obtains, again to wherein passing into 9g ozone, carry out redox reaction after the stirring; Then in the redox reaction product that obtains, add the FeCl that 0.8kg contains 45wt%
3, the PAC of 40wt% and 15wt% the flocculation agent of CPAM, fully mix heavy processing of wadding a quilt with cotton, obtain solid matter and filtrate through press filtration.
It is 0.065 * 10 that the present invention's detection obtains through the heavy resistivity that obtains mud of wadding a quilt with cotton
12M/kg～1.55 * 10
12M/kg;
It is 7.6 that the present invention detects the pH value that obtains filtrate.
The invention provides a kind of method of lignin-sludge, may further comprise the steps: pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction; The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises the FeCl of following component: 0wt% ~ 60wt%
3The polymerize aluminum chloride of 37wt% ~ 95wt%; The cationic polyacrylamide of 3wt% ~ 10wt%.The present invention at first carries out redox reaction with oxygenant with pending mud under the effect of oxidation guiding catalyzer, then the reaction product that obtains is mixed with flocculation agent and carry out the coagulation processing, the flocculation agent that the present invention adopts comprises the FeCl of following component: 0wt% ~ 60wt%
3, the polymerize aluminum chloride of 37wt% ~ 95wt% and the cationic polyacrylamide of 3wt%10wt%, small-molecule substance deposition in the redox reaction product that the flocculation agent that the present invention adopts is conducive to obtain, flocculation agent makes mud flco generation reflocculation, thereby increase the volume of mud flco, newly-generated mud flco is because the rear close structures of dehydration such as the protein in the mud, polysaccharide, reduce the resistivity of mud, be beneficial to the carrying out of the follow-up dewatering process of mud.Experimental result shows, adopting the resistivity of the mud that method provided by the invention obtains is 0.10 * 10
12M/kg ~ 0.4 * 10
12M/kg.
More than the continous treatment process of a kind of mud provided by the present invention is described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (11)
1. the method for a lignin-sludge may further comprise the steps:
Pending mud is mixed with oxidation guiding catalyzer and oxygenant, carry out redox reaction;
The product of described redox reaction is mixed with flocculation agent, carry out coagulation and process, described flocculation agent comprises following component:
The FeCl of 0wt% ~ 60wt%
3
The polymerize aluminum chloride of 37wt% ~ 95wt%;
The cationic polyacrylamide of 3wt%10wt%.
2. method according to claim 1 is characterized in that, described flocculation agent comprises the FeCl of 5wt% ~ 55wt%
3
3. method according to claim 1 is characterized in that, described flocculation agent comprises the polymerize aluminum chloride of 45wt% ~ 90wt%.
4. method according to claim 1 is characterized in that, described flocculation agent comprises the cationic polyacrylamide of 5wt% ~ 8wt%.
5. method according to claim 1 is characterized in that, the mass ratio of the butt of described flocculation agent and described pending mud is (0.05% ~ 5%): 1.
6. method according to claim 1 is characterized in that, described oxidation guiding catalyzer comprises following component:
The metallic compound of 5wt% ~ 45wt%;
The sorbent material of 55wt% ~ 95wt%.
7. method according to claim 6 is characterized in that, described metallic compound is one or both in metal-salt and the metal oxide.
8. method according to claim 6 is characterized in that, the metal in the described metallic compound is one or several among Fe, Mn, Al, V and the Ti.
9. the described method of any one is characterized in that according to claim 6 ~ 8, and described sorbent material is one or more in carbon class sorbent material, sepiolite powder, diatomite, colliery powder, flyash, perlite powder, bentonite in powder, volcano ashes and the kaolin.
10. the described method of any one is characterized in that according to claim 6 ~ 8, and the mass ratio of the butt of described oxidation guiding catalyzer and described pending mud is (3% ~ 8%): 1.
11. method according to claim 1 is characterized in that, described oxygenant is hydrogen peroxide or ozone.
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