CN113754234A - Method for treating phosphorus-containing sludge - Google Patents
Method for treating phosphorus-containing sludge Download PDFInfo
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- CN113754234A CN113754234A CN202111075703.7A CN202111075703A CN113754234A CN 113754234 A CN113754234 A CN 113754234A CN 202111075703 A CN202111075703 A CN 202111075703A CN 113754234 A CN113754234 A CN 113754234A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 86
- 239000011574 phosphorus Substances 0.000 title claims abstract description 86
- 239000010802 sludge Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 21
- 239000012024 dehydrating agents Substances 0.000 claims abstract description 18
- 239000010865 sewage Substances 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 239000002361 compost Substances 0.000 claims abstract description 3
- 239000003337 fertilizer Substances 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 40
- 239000000243 solution Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 30
- 239000001814 pectin Substances 0.000 claims description 25
- 235000010987 pectin Nutrition 0.000 claims description 25
- 229920001277 pectin Polymers 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 14
- 239000000084 colloidal system Substances 0.000 claims description 12
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 12
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 12
- 239000007800 oxidant agent Substances 0.000 claims description 12
- 230000001590 oxidative effect Effects 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 239000003999 initiator Substances 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000002738 chelating agent Substances 0.000 claims description 9
- 239000003431 cross linking reagent Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 7
- 235000011037 adipic acid Nutrition 0.000 claims description 7
- 239000001361 adipic acid Substances 0.000 claims description 7
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical class [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 230000000379 polymerizing effect Effects 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- YEECOJZAMZEUBB-UHFFFAOYSA-N 2,2,3,3,6,6,7,7-octamethyloctane Chemical compound CC(C)(C)C(C)(C)CCC(C)(C)C(C)(C)C YEECOJZAMZEUBB-UHFFFAOYSA-N 0.000 claims description 2
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 claims description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- VKTHZHSHTVVWPN-UHFFFAOYSA-N [Na].[Na].[Na].[Na].[Na].CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCNCCN Chemical compound [Na].[Na].[Na].[Na].[Na].CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCNCCN VKTHZHSHTVVWPN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 208000005156 Dehydration Diseases 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 230000005591 charge neutralization Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method for treating phosphorus-containing sludge, which belongs to the technical field of sludge treatment and comprises the following steps: s1: putting the phosphorus-containing sludge into a drying chamber, adding a dehydrating agent into the phosphorus-containing sludge, drying for 4-6 hours at the temperature of 70-90 ℃ to obtain dried phosphorus-containing sludge, and collecting water lost by the phosphorus-containing sludge to obtain a sewage layer; s2: the phosphorus-containing sludge dried by S1 is placed into an anaerobic tank, an efficient compound phosphorus removal agent is added into the anaerobic tank, and gas in the anaerobic tank is collected by an exhaust fan and is recycled as energy; s3: standing the sewage layer obtained in the step S1 for 10-20min by adopting a low-temperature cold treatment technology, and then dividing the sewage layer into two layers, wherein the upper layer is an oil layer, the lower layer is a clear water layer, the oil layer is mixed with the compost to obtain a mixed fertilizer, and the clear water layer is used for recovering water resources; the treatment method has good settling and dewatering performance on the phosphorus-containing sludge.
Description
Technical Field
The invention belongs to the technical field of sludge technical treatment, and relates to a method for treating phosphorus-containing sludge.
Background
At present, 5464 urban sewage treatment plants in China have annual total sludge yield of 4000 ten thousand tons and cement yield of 8.5-9 tons, sludge is discharged at will, and the effect of emission reduction is greatly reduced, which is equivalent to that pollutants separated after treatment by the sewage treatment plants and completely treated sewage enter the environment together. For a long time, the sewage treatment has the problems of 'heavy water and light sludge', the sludge treatment facilities are seriously insufficient, the harmless treatment rate is low, the heavy metal content and the organic matter content of the sludge are high, the sludge agriculture does not reach consensus, the land utilization range is limited, the landfill is forbidden step by step, the sludge incineration consumption is large, the reduction is thorough, and the method becomes a preferred mode for treating the sludge gradually.
The phosphorus removal agent is one of the necessary detergents for removing phosphorus-containing substances in sludge at present, and when the phosphorus removal agent for sewage on the market is used for removing phosphorus in various environments, the effect is not obvious enough, the phosphorus removal agent can not fully react with phosphorus-containing compounds in the sewage, the dosage is large, the chemical reaction speed is low, the formed floc is small and light, the sedimentation is slow, the filterability is poor, and the like, so that the wide application of the chemical phosphorus removal technology is severely limited.
Disclosure of Invention
The invention aims to provide a method for treating phosphorus-containing sludge, which endows the phosphorus-containing sludge with the function of phosphorus adsorption by preparing an efficient compound phosphorus removal agent, and the added active carbon has stronger adsorption function, so that the phosphorus-containing sludge has good coagulation performance, the flocculating constituent is generated quickly, the concentration is high, the quality is high, the sedimentation performance is excellent, the settled sludge has good dehydration performance and no secondary pollution; the water content can be reduced and the heavy metals in the sludge can be effectively adsorbed by adding the dehydrating agent, so that the secondary pollution of the heavy metals in the sludge is prevented; montmorillonite is used as a main raw material, the doping amount is small when sludge dehydration treatment is carried out, the cost is low, and large-scale popularization is facilitated; by adding the modified diatomite, phosphorus elements contained in water can be fully contacted and removed, so that the phosphorus removal effect is stable, the water treatment effect is good, the pollution removal effect is excellent, the regeneration is simple, the raw material price is low, and the raw material is easy to obtain and safe.
The purpose of the invention can be realized by the following technical scheme:
a method for treating phosphorus-containing sludge comprises the following steps:
s1: putting the phosphorus-containing sludge into a drying chamber, adding a dehydrating agent into the phosphorus-containing sludge, drying for 4-6 hours at the temperature of 70-90 ℃ to obtain dried phosphorus-containing sludge, and collecting water lost by the phosphorus-containing sludge to obtain a sewage layer;
s2: the phosphorus-containing sludge dried by S1 is placed into an anaerobic tank, an efficient compound phosphorus removal agent is added into the anaerobic tank, and gas in the anaerobic tank is collected by an exhaust fan and is recycled as energy;
s3: and (3) standing the sewage layer obtained in the step (S1) for 10-20min by adopting a low-temperature cold treatment technology, and then dividing the sewage layer into two layers, wherein the upper layer is an oil layer, the lower layer is a clear water layer, the oil layer is mixed with the compost to obtain a mixed fertilizer, and the clear water layer is used for water resource recovery.
As a preferable technical scheme of the treatment method of the phosphorus-containing sludge, the high-efficiency compound phosphorus removing agent comprises the following raw materials in parts by weight:
5-15 parts of polyaluminium chloride, 16-28 parts of modified diatomite, 8-12 parts of polyferric chloride, 14-20 parts of polyferric sulfate, 18-26 parts of polyaluminium sulfate, 16-24 parts of activated carbon, 2-8 parts of an oxidant, 4-12 parts of pectin, 2-8 parts of an initiator and 60-100 parts of deionized water;
the modified diatomite is prepared by the following steps:
grinding diatomite into powder, adding the diatomite powder into a beaker filled with a sodium carbonate solution, uniformly stirring, adding a saturated calcium chloride solution, uniformly stirring to obtain a mixed solution, filtering the mixed solution by using filter paper, remaining filter residues in the beaker, drying the filter residues, and then putting the mixture into a muffle furnace for calcination, wherein the reaction temperature of the muffle furnace is 550 ℃, and the reaction time is 3-5 hours, so that the modified diatomite is obtained.
As a preferable technical scheme of the treatment method of the phosphorus-containing sludge, the dehydrating agent comprises the following raw materials in parts by weight:
10-20 parts of montmorillonite, 1.5-2.5 parts of acrylamide, 2-6 parts of ammonium sulfate, 4-8 parts of adipic acid, 0.2-0.6 part of cross-linking agent, 0.08-0.12 part of chelating agent and 30-50 parts of deionized water;
the dehydrating agent is prepared by the following steps:
grinding montmorillonite to powder, adding deionized water, acrylamide, ammonium sulfate and adipic acid, mixing and stirring until the montmorillonite is completely dissolved, adding an acid-base regulator to regulate the pH of the whole solution to be 3.2-6.2, injecting the whole solution into a reaction device, introducing nitrogen and discharging oxygen, adding a chelating agent and a cross-linking agent, after reaction initiation, closing a nitrogen introduction valve, reacting for 2-4 hours, preserving heat for 1-3 hours to obtain a flocculant colloid, crushing the colloid, drying at the high temperature of 50-70 ℃, crushing and sieving to obtain flocculant powder, and then mixing the flocculant powder with the deionized water according to the dosage ratio: 0.5 g: 200ml to obtain a dehydrating agent.
In a preferable embodiment of the method for treating phosphorus-containing sludge of the present invention, the crosslinking agent is any one or more of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide, diethylenetriamine, dicumyl peroxide, and dicumyl peroxide; the chelating agent is one or two of diethylenetriamine pentaacetic acid pentasodium, ethylenediamine tetraacetic acid, aminocarboxylic acid, 1, 3-diketone and hydroxycarboxylic acid.
As a preferable technical scheme of the treatment method of the phosphorus-containing sludge, the oxidant is any one or more than two of hydrogen peroxide, peracetic acid, sodium dichromate, chromic acid, nitric acid, potassium permanganate and ammonium persulfate.
As the preferable technical scheme of the treatment method of the phosphorus-containing sludge, the preparation method of the high-efficiency compound phosphorus removing agent comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, mixing 40% of deionized water and pectin by weight, and fully stirring and dissolving to obtain a pectin solution;
thirdly, adding polyaluminium chloride, polyferric sulfate, polyaluminium sulfate and active carbon into a reaction tank filled with pectin solution for stirring, mixing for 10min under the conditions that the stirring speed is 400-600r/min and the temperature is 55-65 ℃, fully dissolving the mixture, adding an initiator into the solution, heating to 70-90 ℃ for polymerization reaction, and obtaining a premix;
and fourthly, adding modified diatomite and an oxidant into the premix, polymerizing for 2.5 hours at the temperature of 75 ℃ to obtain a high-efficiency composite phosphorus removing liquid, putting the high-efficiency composite phosphorus removing liquid into an oven, drying for 7 hours at the temperature of 105 ℃, taking out the high-efficiency composite phosphorus removing liquid, and grinding to obtain the high-efficiency composite phosphorus removing agent.
The invention has the beneficial effects that:
(1) the preparation method prepares the porous pectin shell by preparing the efficient compound phosphorus removing agent, taking pectin as a shell and adding polymerization-initiated polyacrylamide as a pore-forming agent into the pectin, so as to endow the pectin shell with a phosphorus adsorption effect; the activated carbon added into the pectin shell has stronger adsorption effect; meanwhile, through the effects of oxidation and flocculation sedimentation, the efficient composite phosphorus removal agent has good charge neutralization and adsorption bridging functions, good condensation performance, rapid generation of flocculating constituents, high concentration, large mass, excellent sedimentation performance, good dewatering performance of settled sludge and no secondary pollution.
(2) The invention can reduce the water content and effectively adsorb heavy metal in the sludge by adding the dehydrating agent, thereby preventing the secondary pollution of the heavy metal in the sludge; montmorillonite is used as a main raw material, the doping amount is small when sludge dehydration treatment is carried out, the cost is low, and large-scale popularization is facilitated.
(3) According to the invention, through adding the modified diatomite, the diatomite has the functions of adsorption, coagulation, filtration, coprecipitation and the like, and can fully contact and remove phosphorus elements contained in water, so that the phosphorus removal effect is stable, the water treatment effect is good, the pollution removal efficiency is excellent, the regeneration is simple, the raw material price is low, and the raw material is easy to obtain and safe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The modified diatomite is prepared by the following steps:
grinding diatomite into powder, adding the diatomite powder into a beaker filled with a sodium carbonate solution, uniformly stirring, adding a saturated calcium chloride solution, uniformly stirring to obtain a mixed solution, filtering the mixed solution by using filter paper, remaining filter residues in the beaker, drying the filter residues, and then putting the mixture into a muffle furnace for calcination, wherein the reaction temperature of the muffle furnace is 550 ℃, and the reaction time is 3 hours, so that the modified diatomite is obtained.
Example 2
The modified diatomite is prepared by the following steps:
grinding diatomite into powder, adding the diatomite powder into a beaker filled with a sodium carbonate solution, uniformly stirring, adding a saturated calcium chloride solution, uniformly stirring to obtain a mixed solution, filtering the mixed solution by using filter paper, remaining filter residues in the beaker, drying the filter residues, and then putting the mixture into a muffle furnace for calcination, wherein the reaction temperature of the muffle furnace is 550 ℃, and the reaction time is 4 hours, so that the modified diatomite is obtained.
Example 3
The modified diatomite is prepared by the following steps:
grinding diatomite into powder, adding the diatomite powder into a beaker filled with a sodium carbonate solution, uniformly stirring, adding a saturated calcium chloride solution, uniformly stirring to obtain a mixed solution, filtering the mixed solution by using filter paper, remaining filter residues in the beaker, drying the filter residues, and then putting the mixture into a muffle furnace for calcination, wherein the reaction temperature of the muffle furnace is 550 ℃, and the reaction time is 5 hours, so that the modified diatomite is obtained.
Example 4
The dehydrating agent is prepared by the following steps:
grinding montmorillonite to powder, adding deionized water, acrylamide, ammonium sulfate and adipic acid, mixing and stirring until the montmorillonite is completely dissolved, adding an acid-base regulator to regulate the pH of the whole solution to be 3.2-6.2, injecting the whole solution into a reaction device, introducing nitrogen and discharging oxygen, adding a chelating agent and a cross-linking agent, after reaction initiation, closing a nitrogen introduction valve, reacting for 2-4 hours, preserving heat for 1-3 hours to obtain a flocculant colloid, crushing the colloid, drying at the high temperature of 50-70 ℃, crushing and sieving to obtain flocculant powder, and then mixing the flocculant powder with the deionized water according to the dosage ratio: 0.5 g: 200ml to obtain a dehydrating agent.
Example 5
The dehydrating agent is prepared by the following steps:
grinding 10 parts of montmorillonite to powder, adding 30 parts of deionized water, 1.5 parts of acrylamide, 2 parts of ammonium sulfate and 4 parts of adipic acid, mixing and stirring until the mixture is completely dissolved, adding an acid-base regulator to regulate the pH of the whole solution to be 3.2, injecting the whole solution into a reaction device, introducing nitrogen to discharge oxygen, adding 0.08 part of chelating agent and 0.2 part of cross-linking agent, closing a nitrogen introducing valve after reaction initiation, keeping the temperature for 1 hour after reaction for 2 hours to obtain a flocculant colloid, crushing the flocculant colloid, drying the flocculant colloid at a high temperature of 50 ℃, crushing and sieving the flocculant colloid to obtain flocculant powder, wherein the flocculant powder and the deionized water are mixed according to the dosage ratio: 0.5 g: 200ml to obtain a dehydrating agent.
Example 6
The dehydrating agent is prepared by the following steps:
grinding 15 parts of montmorillonite to powder, adding 40 parts of deionized water, 2 parts of acrylamide, 4 parts of ammonium sulfate and 6 parts of adipic acid, mixing and stirring until the materials are completely dissolved, adding an acid-base regulator to regulate the pH of the whole solution to be 4.7, injecting the whole solution into a reaction device, introducing nitrogen to discharge oxygen, adding 0.1 part of chelating agent and 0.4 part of cross-linking agent, after reaction initiation, closing a nitrogen introducing valve, after reaction for 3 hours, preserving heat for 2 hours to obtain a flocculant colloid, crushing the colloid, drying at the high temperature of 60 ℃, crushing and sieving to obtain flocculant powder, and then mixing the flocculant powder with the deionized water according to the dosage ratio: 0.5 g: 200ml to obtain a dehydrating agent.
Example 7
The preparation method of the high-efficiency compound phosphorus removing agent comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 5 parts of polyaluminium chloride, 16 parts of modified diatomite, 8 parts of polyferric chloride, 14 parts of polyferric sulfate, 18 parts of polyaluminium sulfate, 16 parts of activated carbon, 2 parts of oxidant, 4 parts of pectin, 2 parts of initiator and 60 parts of deionized water;
secondly, mixing 40% of deionized water and pectin by weight, and fully stirring and dissolving to obtain a pectin solution;
adding polyaluminium chloride, polyferric sulfate, polyaluminium sulfate and active carbon into a reaction tank filled with pectin solution, stirring, mixing for 10min at the stirring speed of 400r/min and the temperature of 55 ℃, fully dissolving, adding an initiator into the solution, heating to 70 ℃, and carrying out polymerization reaction to obtain a premix;
and fourthly, adding modified diatomite and an oxidant into the premix, polymerizing for 2.5 hours at the temperature of 75 ℃ to obtain a high-efficiency composite phosphorus removing liquid, putting the high-efficiency composite phosphorus removing liquid into an oven, drying for 7 hours at the temperature of 105 ℃, taking out the high-efficiency composite phosphorus removing liquid, and grinding to obtain the high-efficiency composite phosphorus removing agent.
Wherein modified diatomaceous earth was obtained in example 1.
Example 8
The preparation method of the high-efficiency compound phosphorus removing agent comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 10 parts of polyaluminium chloride, 20 parts of modified diatomite, 10 parts of polyferric chloride, 17 parts of polyferric sulfate, 22 parts of polyaluminium sulfate, 20 parts of activated carbon, 5 parts of oxidant, 8 parts of pectin, 5 parts of initiator and 80 parts of deionized water;
secondly, mixing 40% of deionized water and pectin by weight, and fully stirring and dissolving to obtain a pectin solution;
adding polyaluminium chloride, polyferric sulfate, polyaluminium sulfate and active carbon into a reaction tank filled with pectin solution, stirring, mixing for 10min at the stirring speed of 500r/min and the temperature of 60 ℃ to fully dissolve the components, adding an initiator into the solution, heating to 80 ℃ for polymerization reaction to obtain a premix;
and fourthly, adding modified diatomite and an oxidant into the premix, polymerizing for 2.5 hours at the temperature of 75 ℃ to obtain a high-efficiency composite phosphorus removing liquid, putting the high-efficiency composite phosphorus removing liquid into an oven, drying for 7 hours at the temperature of 105 ℃, taking out the high-efficiency composite phosphorus removing liquid, and grinding to obtain the high-efficiency composite phosphorus removing agent.
Wherein modified diatomaceous earth was obtained in example 2.
Example 9
The preparation method of the high-efficiency compound phosphorus removing agent comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 15 parts of polyaluminium chloride, 28 parts of modified diatomite, 12 parts of polyferric chloride, 20 parts of polyferric sulfate, 26 parts of polyaluminium sulfate, 24 parts of activated carbon, 8 parts of oxidant, 12 parts of pectin, 8 parts of initiator and 100 parts of deionized water;
secondly, mixing 40% of deionized water and pectin by weight, and fully stirring and dissolving to obtain a pectin solution;
adding polyaluminium chloride, polyferric sulfate, polyaluminium sulfate and active carbon into a reaction tank filled with pectin solution, stirring, mixing for 10min at the stirring speed of 600r/min and the temperature of 65 ℃ to fully dissolve the components, adding an initiator into the solution, heating to 90 ℃ for polymerization reaction to obtain a premix;
and fourthly, adding modified diatomite and an oxidant into the premix, polymerizing for 2.5 hours at the temperature of 75 ℃ to obtain a high-efficiency composite phosphorus removing liquid, putting the high-efficiency composite phosphorus removing liquid into an oven, drying for 7 hours at the temperature of 105 ℃, taking out the high-efficiency composite phosphorus removing liquid, and grinding to obtain the high-efficiency composite phosphorus removing agent.
Wherein modified diatomaceous earth was obtained in example 3.
Comparative example 1
The modified diatomaceous earth from examples 1 to 3 was replaced with diatomaceous earth, and the remaining raw materials and preparation process were kept unchanged.
The samples obtained in examples 7 to 9 and comparative example 1 were subjected to phosphorus removal (%) and COD (%) tests; testing the water content (%) of the sludge according to a sludge inspection method (CJT221-2005) of an urban sewage treatment plant;
the test results are shown in the following table:
as can be seen from the table above, the method for treating phosphorus-containing sludge, provided by the invention, has the advantages that the replacement of the modified diatomite and the diatomite reduces the phosphorus removal and COD removal capabilities in the comparative example, so that the water content of the sludge is increased; the high-efficiency composite phosphorus removing agent prepared by the invention is matched with a dehydrating agent for use, has the function of adsorbing phosphorus, simultaneously reduces the COD content in sludge through the functions of oxidation and flocculation sedimentation, has good charge neutralization and adsorption bridging functions, good coagulation performance, rapid generation of flocculating constituents, high concentration, large quality, excellent sedimentation performance, good dehydration performance of the settled sludge and no secondary pollution.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A method for treating phosphorus-containing sludge is characterized by comprising the following steps: the method comprises the following steps:
s1: putting the phosphorus-containing sludge into a drying chamber, adding a dehydrating agent into the phosphorus-containing sludge, drying for 4-6 hours at the temperature of 70-90 ℃ to obtain dried phosphorus-containing sludge, and collecting water lost by the phosphorus-containing sludge to obtain a sewage layer;
s2: the phosphorus-containing sludge dried by S1 is placed into an anaerobic tank, an efficient compound phosphorus removal agent is added into the anaerobic tank, and gas in the anaerobic tank is collected by an exhaust fan and is recycled as energy;
s3: and (3) standing the sewage layer obtained in the step (S1) for 10-20min by adopting a low-temperature cold treatment technology, and then dividing the sewage layer into two layers, wherein the upper layer is an oil layer, the lower layer is a clear water layer, the oil layer is mixed with the compost to obtain a mixed fertilizer, and the clear water layer is used for water resource recovery.
2. The method for treating phosphorus-containing sludge according to claim 1, wherein: the efficient composite phosphorus removing agent comprises the following raw materials in parts by weight:
5-15 parts of polyaluminium chloride, 16-28 parts of modified diatomite, 8-12 parts of polyferric chloride, 14-20 parts of polyferric sulfate, 18-26 parts of polyaluminium sulfate, 16-24 parts of activated carbon, 2-8 parts of an oxidant, 4-12 parts of pectin, 2-8 parts of an initiator and 60-100 parts of deionized water;
the modified diatomite is prepared by the following steps:
grinding diatomite into powder, adding the diatomite powder into a beaker filled with a sodium carbonate solution, uniformly stirring, adding a saturated calcium chloride solution, uniformly stirring to obtain a mixed solution, filtering the mixed solution by using filter paper, remaining filter residues in the beaker, drying the filter residues, and then putting the mixture into a muffle furnace for calcination, wherein the reaction temperature of the muffle furnace is 550 ℃, and the reaction time is 3-5 hours, so that the modified diatomite is obtained.
3. The method for treating phosphorus-containing sludge according to claim 1, wherein: the dehydrating agent comprises the following raw materials in parts by weight:
10-20 parts of montmorillonite, 1.5-2.5 parts of acrylamide, 2-6 parts of ammonium sulfate, 4-8 parts of adipic acid, 0.2-0.6 part of cross-linking agent, 0.08-0.12 part of chelating agent and 30-50 parts of deionized water;
the dehydrating agent is prepared by the following steps:
grinding montmorillonite to powder, adding deionized water, acrylamide, ammonium sulfate and adipic acid, mixing and stirring until the montmorillonite is completely dissolved, adding an acid-base regulator to regulate the pH of the whole solution to be 3.2-6.2, injecting the whole solution into a reaction device, introducing nitrogen and discharging oxygen, adding a chelating agent and a cross-linking agent, after reaction initiation, closing a nitrogen introduction valve, reacting for 2-4 hours, preserving heat for 1-3 hours to obtain a flocculant colloid, crushing the colloid, drying at the high temperature of 50-70 ℃, crushing and sieving to obtain flocculant powder, and then mixing the flocculant powder with the deionized water according to the dosage ratio: 0.5 g: 200ml to obtain a dehydrating agent.
4. The method for treating phosphorus-containing sludge according to claim 3, wherein: the cross-linking agent is any one or more than two of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide, diethylenetriamine, dicumyl peroxide and dicumyl peroxide; the chelating agent is one or two of diethylenetriamine pentaacetic acid pentasodium, ethylenediamine tetraacetic acid, aminocarboxylic acid, 1, 3-diketone and hydroxycarboxylic acid.
5. The method for treating phosphorus-containing sludge according to claim 2, wherein: the oxidant is any one or more than two of hydrogen peroxide, peroxyacetic acid, sodium dichromate, chromic acid, nitric acid, potassium permanganate and ammonium persulfate.
6. The method for treating phosphorus-containing sludge according to claim 2, wherein: the preparation method of the efficient composite phosphorus removing agent comprises the following steps:
firstly, weighing raw materials in parts by weight;
secondly, mixing 40% of deionized water and pectin by weight, and fully stirring and dissolving to obtain a pectin solution;
thirdly, adding polyaluminium chloride, polyferric sulfate, polyaluminium sulfate and active carbon into a reaction tank filled with pectin solution for stirring, mixing for 10min under the conditions that the stirring speed is 400-600r/min and the temperature is 55-65 ℃, fully dissolving the mixture, adding an initiator into the solution, heating to 70-90 ℃ for polymerization reaction, and obtaining a premix;
and fourthly, adding modified diatomite and an oxidant into the premix, polymerizing for 2.5 hours at the temperature of 75 ℃ to obtain a high-efficiency composite phosphorus removing liquid, putting the high-efficiency composite phosphorus removing liquid into an oven, drying for 7 hours at the temperature of 105 ℃, taking out the high-efficiency composite phosphorus removing liquid, and grinding to obtain the high-efficiency composite phosphorus removing agent.
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| CN117535685A (en) * | 2024-01-09 | 2024-02-09 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538404A (en) * | 1991-08-06 | 1993-02-19 | Toagosei Chem Ind Co Ltd | Dewatering agent for bentonite sludge |
| CN110396393A (en) * | 2019-07-08 | 2019-11-01 | 南京迪天高新产业技术研究院有限公司 | A kind of heavy metal deactivator and preparation method thereof using matrix production |
| CN112250123A (en) * | 2020-10-12 | 2021-01-22 | 德州万达环保科技有限公司 | Composite phosphorus removing agent for enhanced phosphorus reduction in sewage treatment and preparation technology |
| CN112480310A (en) * | 2020-12-08 | 2021-03-12 | 爱森（中国）絮凝剂有限公司 | Cross-linked cationic polyacrylamide sludge dehydrating agent and preparation method thereof |
| CN112607817A (en) * | 2021-01-12 | 2021-04-06 | 南京迪海智科精密机械有限公司 | Efficient composite phosphorus removal agent, preparation method and application |
| CN112679041A (en) * | 2020-12-24 | 2021-04-20 | 北控水务建设发展有限公司 | Enhanced phosphorus removal process for sewage treatment plant |
| CN112794622A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Heavy metal-containing sludge dehydrating agent |
-
2021
- 2021-09-14 CN CN202111075703.7A patent/CN113754234A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0538404A (en) * | 1991-08-06 | 1993-02-19 | Toagosei Chem Ind Co Ltd | Dewatering agent for bentonite sludge |
| CN110396393A (en) * | 2019-07-08 | 2019-11-01 | 南京迪天高新产业技术研究院有限公司 | A kind of heavy metal deactivator and preparation method thereof using matrix production |
| CN112250123A (en) * | 2020-10-12 | 2021-01-22 | 德州万达环保科技有限公司 | Composite phosphorus removing agent for enhanced phosphorus reduction in sewage treatment and preparation technology |
| CN112480310A (en) * | 2020-12-08 | 2021-03-12 | 爱森（中国）絮凝剂有限公司 | Cross-linked cationic polyacrylamide sludge dehydrating agent and preparation method thereof |
| CN112679041A (en) * | 2020-12-24 | 2021-04-20 | 北控水务建设发展有限公司 | Enhanced phosphorus removal process for sewage treatment plant |
| CN112607817A (en) * | 2021-01-12 | 2021-04-06 | 南京迪海智科精密机械有限公司 | Efficient composite phosphorus removal agent, preparation method and application |
| CN112794622A (en) * | 2021-03-23 | 2021-05-14 | 深圳瑞新达新能源科技有限公司 | Heavy metal-containing sludge dehydrating agent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117535685A (en) * | 2024-01-09 | 2024-02-09 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
| CN117535685B (en) * | 2024-01-09 | 2024-04-02 | 常熟理工学院 | Method for recycling elemental phosphorus from municipal sludge |
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