CN112108104A - Method for removing proteins in slaughter wastewater by using modified porous boron nitride - Google Patents
Method for removing proteins in slaughter wastewater by using modified porous boron nitride Download PDFInfo
- Publication number
- CN112108104A CN112108104A CN202011005624.4A CN202011005624A CN112108104A CN 112108104 A CN112108104 A CN 112108104A CN 202011005624 A CN202011005624 A CN 202011005624A CN 112108104 A CN112108104 A CN 112108104A
- Authority
- CN
- China
- Prior art keywords
- boron nitride
- porous boron
- modified porous
- slaughter wastewater
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229910052582 BN Inorganic materials 0.000 title claims abstract description 62
- 238000003307 slaughter Methods 0.000 title claims abstract description 43
- 239000002351 wastewater Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 38
- 102000004169 proteins and genes Human genes 0.000 title claims abstract description 36
- 108090000623 proteins and genes Proteins 0.000 title claims abstract description 36
- 238000001179 sorption measurement Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 23
- 239000006228 supernatant Substances 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 11
- 238000000967 suction filtration Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 8
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004327 boric acid Substances 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002243 precursor Substances 0.000 claims abstract description 8
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 239000008367 deionised water Substances 0.000 claims abstract description 5
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000009835 boiling Methods 0.000 claims abstract description 4
- 230000004913 activation Effects 0.000 claims abstract description 3
- 238000011282 treatment Methods 0.000 claims description 25
- 239000000706 filtrate Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000007853 buffer solution Substances 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims 1
- 239000011259 mixed solution Substances 0.000 abstract description 3
- 238000003933 environmental pollution control Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 11
- 239000004519 grease Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 235000013372 meat Nutrition 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- -1 fatty acid salt Chemical class 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000001554 Hemoglobins Human genes 0.000 description 1
- 108010054147 Hemoglobins Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 150000003278 haem Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000009278 visceral effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/305—Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores
- B01J20/3064—Addition of pore forming agents, e.g. pore inducing or porogenic agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
- C01B21/0648—After-treatment, e.g. grinding, purification
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
Abstract
A method for removing proteins in slaughter wastewater by using modified porous boron nitride, belonging to the field of environmental pollution control. The method comprises the following steps: (1) oscillating the mixed solution of melamine, boric acid and ammonium sulfate at constant temperature under different temperature gradients, and performing suction filtration; (2) drying and grinding to obtain a boron nitride precursor; (3) performing high-temperature activation under a protective atmosphere; (4) boiling in deionized water, rinsing to neutrality, and vacuum filtering for drying; (5) modifying with acid solution or alkali solution; (6) carrying out suction filtration, drying and grinding to obtain modified porous boron nitride; (7) adding modified porous boron nitride into the supernatant of slaughter wastewater, oscillating, adsorbing and filtering; (8) compared with the supernatant of the slaughter wastewater before and after adsorption, the removal rate of the protein in the slaughter wastewater is up to 80-90%. The method has strong removal capacity and no secondary pollution, and the prepared modified porous boron nitride can be recycled.
Description
Technical Field
The invention belongs to the field of environmental pollution control, and particularly relates to a method for removing proteins in slaughter wastewater by using modified porous boron nitride.
Background
Along with the development of national economy, the living standard of people is obviously improved, and the demand of people for meat is greatly improved. In recent years, the development of large and advanced slaughtering enterprises is encouraged by the nation, the scale of slaughtering houses is gradually enlarged, and a large amount of slaughtering wastewater is generated, and becomes one of important industrial wastewater in China, and accounts for about 6% of the total discharge amount of the industrial wastewater in China. Slaughter wastewater is reddish brown and has fishy smell, contains a large amount of blood stains, fur, broken bone and meat, grease and visceral impurities, and contains high-concentration organic matters mainly including protein and fat. If the slaughtering wastewater is discharged into the water body without being treated, a large amount of dissolved oxygen in the water can be consumed, and great harm is generated to animals and plants in the water body.
At present, the treatment methods of high-content component protein in slaughter wastewater in China comprise biological treatment, natural ecological treatment, chemical treatment and physical treatment methods. The protein belongs to a large molecular long-chain organic matter, when the biological treatment method is used, the large molecular protein is difficult to be directly used by common aerobic bacteria, the large molecular protein needs to be decomposed into small molecular organic matters such as amino acid, carbohydrate and the like through the action of enzyme, then the microorganisms are subjected to further decomposition treatment after necessary screening, culture and domestication, and the removal rate of heme in hemoglobin by the aerobic microorganisms is not high. The natural ecological treatment method has the advantages of low energy consumption, simple and convenient management and low operation cost, but has large occupied area and longer treatment period. Researchers are the most extensive and common for biological treatment methods, and generally design an overall effective treatment process or complete equipment, for example, a novel slaughter wastewater resource treatment device shown in CN208362113U is simple to operate, low in treatment cost and capable of creating considerable economic benefits, effluent can meet the primary standard of the meat processing industry water pollution discharge standard, a large amount of biogas can be generated, and the biogas amount completely meets the production requirements of slaughter plants. For example, in a complete set of slaughter wastewater treatment device shown in CN105645688B and a method for treating wastewater by using the device, a process principle of 'hydrolytic acidification + aerobic' is adopted, so that the device has the advantages of small occupied area, high treatment efficiency, low one-time engineering investment and stronger practicability. For example, in the treatment method of the slaughter wastewater of CN109081523A, the polyvinyl alcohol zinc oxide composite microspheres and the degrading bacteria are added into the slaughter wastewater, so that the attachment and the growth of the degrading bacteria are facilitated, and the COD degradation rate of the sewage is improved. The chemical treatment method mainly comprises coagulation flocculation, for example, CN103641224A shows that the COD removal rate of a flocculating agent is higher than 93.32 percent and can reach 96.52 percent at most, and the BOD removal rate can be higher than 91.26 percent and can reach 95.83 percent at most. For example, CN106365283B shows a flocculating agent with small application amount, remarkable flocculation effect, which is beneficial to reducing the difficulty and cost of wastewater treatment and can also effectively ensure that the water quality after wastewater treatment reaches the standard. The method has the advantages of simple process, short reaction time, small occupied area and low cost, but has low treatment efficiency and large secondary product yield and is difficult to treat. The physical treatment method mainly utilizes an adsorbent to adsorb protein, the adsorption method is simple to operate, raw materials are easy to obtain, and a common adsorbent is activated carbon, but the adsorption efficiency is low, and the adsorption is not selective. For example, the method shown in CN102992548B uses activated carbon for final adsorption.
Compared with traditional adsorbing materials such as activated carbon, the novel porous material of boron nitride has more advantages. The boron nitride has more stable chemical property, has good corrosion resistance because the chemical inertia presented by the boron nitride is not easy to react with acid, alkali and most chemical elements, and can not react with the chemical elements when being used as an adsorbent. In addition, the specific surface area of the boron nitride is larger, and the thermal performance is extremely stable.
Currently, boron nitride and its synthetic materials are used in various fields as electrical conductive materials, energy storage materials, adsorption materials, refractory materials, and the like. The different preparation methods can change the appearance and the property of the boron nitride, so that the boron nitride can be applied to different fields. For example, the boron nitride composite material prepared by CN201110387268.1 has excellent performances of high heat conductivity, low thermal expansion coefficient and low dielectric loss on the basis of keeping the heat resistance of the original thermosetting resin. For example, the preparation method of the boron nitride ceramic material shown in CN1746134A is a method for rapidly preparing a high-purity hexagonal boron nitride ceramic material at a low temperature. Currently, boron nitride modification is mainly focused on adding a catalyst to increase functional groups, changing contact angles, or changing the pore structure of boron nitride by using bubble generation.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention aims to provide a method for efficiently removing proteins from slaughter wastewater. The method can not only remove high-concentration protein in slaughter wastewater with high efficiency, but also remove a small amount of grease.
Slaughter wastewater is typical organic wastewater, is rich in protein and grease, does not contain heavy metal and toxic substances, and contains nitrogen and phosphorus as main nutrient substances. Slaughter wastewater can remove most of grease and suspended matters through primary treatment, and the filtrate left after treatment contains a large amount of free long-chain protein molecules which are attached to the surface of the grease and aggregated into clusters. The modified boron nitride prepared by the method is added into the filtrate, so that protein molecules can enter the internal pore structure of the modified boron nitride through physical adsorption. In addition, the surface layer of the porous boron nitride material crystal modified by acid or alkali is changed to provide acid and alkali active sites for chemical adsorption, the pH of the slaughter waste liquid is adjusted to enable the waste liquid to present an acidic or alkaline environment, the protein is dissociated into acidic or alkaline groups by utilizing the amphoteric dissociation characteristic of the protein, and protein molecules contained in the slaughter waste liquid are attached to the surface layer of the modified porous boron nitride material by chemical adsorption. A small amount of grease can be physically adsorbed by the modified porous boron nitride material, and simultaneously hydrolysis reaction can be carried out in the waste liquid after the pH is adjusted to generate soluble glycerin, fatty acid or fatty acid salt, so that the soluble glycerin, fatty acid or fatty acid salt can be effectively removed. The method can achieve the aim of removing high-concentration protein in slaughter wastewater by using a physical and chemical double adsorption means.
The purpose of the invention is realized by the following technical scheme:
a method for removing proteins in slaughter wastewater by using modified porous boron nitride, comprising the following steps of:
(1) weighing a certain amount of melamine, boric acid and ammonium sulfate, dissolving in water, stirring to be white colloid, then oscillating at constant temperature under different temperature gradients to obtain white flocculent mixed liquor, and performing suction filtration to obtain white flocculent precipitate;
(2) placing the obtained flocculent precipitate in a drying oven, drying at 60-105 ℃ for 12-24h, cooling to room temperature, and grinding into white powder to obtain a powdery boron nitride precursor;
(3) carrying out high-temperature activation on the obtained boron nitride precursor in a protective atmosphere to finally obtain white porous boron nitride;
(4) boiling the prepared porous boron nitride in deionized water for 30-60min, rinsing to neutrality, filtering, and drying; the drying temperature is 60-105 ℃, and the drying time is 12-24 h;
(5) respectively dissolving the dried porous boron nitride into 5% acid liquor or 5% alkali liquor, stirring for 4h at a constant temperature of 60 ℃, performing modification treatment, performing suction filtration, drying in a drying oven at a temperature of 60-105 ℃ for 12-24h, and grinding to obtain modified porous boron nitride powder; wherein the volume mass ratio of the acid solution or the alkali solution to the porous boron nitride is (10-20) to 1 mL/g;
(6) adding a B-R buffer solution into the filtered slaughter wastewater supernatant to enable the pH value of the waste liquid to be 4-10, adding the prepared modified porous boron nitride, placing the mixed liquid into a vortex oscillator, carrying out suction filtration after oscillation adsorption for 5 hours to obtain filtrate after adsorption treatment; wherein the volume-mass ratio of the filtered slaughter wastewater supernatant to the modified porous boron nitride is (100-): 110: 1 mL/g;
(7) compared with the supernatant of slaughter wastewater before and after adsorption, the removal rate of protein is as high as 80-90%.
The method for removing the protein in the slaughtering wastewater by using the modified porous boron nitride comprises the following steps:
in the step (1), the mol ratio of the melamine to the boric acid is 1:2, and the adding amount of the ammonium sulfate is 30 wt% of the total mass of the melamine, the boric acid and the ammonium sulfate mixture.
And (3) the protective atmosphere in the step (3) is nitrogen or ammonia, and the gas flow rate is 50-300 mL/min.
The 5% acid solution in the step (5) is a 5% nitric acid aqueous solution, and the 5% alkali solution is a 5% sodium hydroxide aqueous solution.
The rotating speed of the vortex oscillator in the step (6) is 180rpm, and the oscillation temperature is 20-40 ℃; the protein content of the supernatant of the slaughtering wastewater is 0.1-2.0mg/mL, and the pH range is 4-10.
The invention has the advantages that:
(1) the method of the invention can effectively treat slaughter wastewater containing high-concentration protein.
(2) According to the invention, the boron nitride precursor is activated at high temperature after adding the pore-forming agent, so that the spatial polarity and ionic bond effect of the boron nitride are further enhanced, the micro-pore structure of the boron nitride is changed, the specific surface area is increased, and the physical adsorption effect is enhanced.
(3) According to the invention, acid-base modification is carried out on the porous boron nitride modified by introducing the pore-forming agent, so that functional groups on the surface of the porous boron nitride are changed, chemical adsorption sites are increased, and the chemical adsorption effect is enhanced.
(4) The preparation method is simple, the operation is easy, the raw materials used for preparation are cheap and easy to obtain and are nontoxic, and the prepared modified porous boron nitride material has stable chemical properties.
(5) The modified boron nitride prepared by the invention has higher adsorption capacity and strong regeneration performance.
(6) The method has no secondary pollution, and the used modified boron nitride can be recycled.
Detailed Description
The scheme of the present invention is described in detail with reference to the examples, which are only for illustrating the present invention and should not be construed as limiting the scope of the present invention
Example 1
A method for removing proteins in slaughter wastewater by using modified porous boron nitride comprises the following specific operation steps:
(1) weighing 18.92g of melamine and 18.55g of boric acid according to a molar ratio of 1:2, meanwhile weighing 16.06g of ammonium sulfate according to a proportion of 30 wt%, placing the 3 materials in a 1000mL conical flask, adding deionized water to a constant volume, stirring until the mixture is white colloid, and then placing the colloid in a full-temperature shaking table, and oscillating at a constant temperature of 85 ℃ for 10 hours to obtain a bulk floc; adjusting the temperature of the full-temperature shaking table to be constant at 70 ℃, and oscillating for 4h to obtain colorless liquid; continuously adjusting the temperature to 55 ℃ and oscillating for 10 hours to obtain white flocculent mixed liquor; standing the obtained mixed solution to room temperature, and performing suction filtration to obtain white flocculent precipitate;
(2) placing the obtained flocculent precipitate in a drying oven, drying at constant temperature of 100 ℃ for 12h, cooling to room temperature, and grinding into white powder to obtain a boron nitride precursor;
(3) placing the obtained boron nitride-like precursor in a tubular furnace, and activating at high temperature for 6 hours at 1300 ℃ in a nitrogen atmosphere to finally obtain white porous boron nitride; wherein the flow rate of the nitrogen gas is 100 mL/min;
(4) placing the activated porous boron nitride in deionized water, boiling for 30min, rinsing to neutrality, performing suction filtration, and drying in a drying oven at 100 deg.C for 12 h;
(5) adding the dried porous boron nitride into a 5% nitric acid solution according to the volume mass ratio of 1000:1mL/g, and stirring for 4 hours at the constant temperature of 60 ℃ for modification treatment;
then carrying out suction filtration, placing the mixture in a drying oven for drying for 12h at a constant temperature of 100 ℃, and grinding the mixture to obtain modified porous boron nitride powder;
(6) taking 100mL of wastewater supernatant of a certain slaughtering and meat processing factory, wherein the protein content of the wastewater supernatant is 1.2mg/mL, and the pH value of the wastewater supernatant is 6.4, and the wastewater supernatant mainly contains protein, high-concentration nitrogen-containing compounds, grease and other pollutants; adding a B-R buffer solution until the pH of the waste liquid is 9;
adding 1g of prepared modified porous boron nitride, placing the mixed solution in a vortex oscillator, setting the rotation speed of the vortex oscillator at 180rpm and the temperature at 30 ℃; filtering after oscillating and adsorbing for 5h to obtain filtrate after adsorption treatment;
(7) comparing the filtrate before and after adsorption, the protein removal rate of the filtrate after adsorption is 87% by using an ultraviolet spectrometry method.
Example 2
The operation steps of this embodiment are the same as those of embodiment 1, except that: the modifying reagent added in the step (5) is 5% sodium hydroxide solution; adding a B-R buffer solution in the step (7) until the pH of the waste liquid is 5; comparing the filtrate before and after adsorption, and measuring by using an ultraviolet spectroscopy, the protein removal rate of the filtrate after adsorption is 85%.
Comparative example
The comparative example was conducted in the same manner as example 1 except that: omitting steps (4) and (5); comparing the filtrate before and after adsorption, the protein removal rate of the filtrate after adsorption is 81% by using an ultraviolet spectrometry method.
The data of the examples and the comparative examples show that the modified porous boron nitride has outstanding adsorption performance and can effectively remove high-concentration protein in slaughter wastewater.
Claims (5)
1. A method for removing proteins in slaughter wastewater by using modified porous boron nitride is characterized by comprising the following steps:
(1) weighing a certain amount of melamine, boric acid and ammonium sulfate, dissolving in water, stirring to be white colloid, then oscillating at constant temperature under different temperature gradients to obtain white flocculent mixed liquor, and performing suction filtration to obtain white flocculent precipitate;
(2) placing the obtained flocculent precipitate in a drying oven, drying at 60-105 ℃ for 12-24h, cooling to room temperature, and grinding into white powder to obtain a powdery boron nitride precursor;
(3) carrying out high-temperature activation on the obtained boron nitride precursor in a protective atmosphere to finally obtain white porous boron nitride;
(4) boiling the prepared porous boron nitride in deionized water for 30-60min, rinsing to neutrality, filtering, and drying; the drying temperature is 60-105 ℃, and the drying time is 12-24 h;
(5) respectively dissolving the dried porous boron nitride into 5% acid liquor or 5% alkali liquor, stirring for 4h at a constant temperature of 60 ℃, performing modification treatment, performing suction filtration, drying in a drying oven at a temperature of 60-105 ℃ for 12-24h, and grinding to obtain modified porous boron nitride powder; wherein the volume mass ratio of the acid solution or the alkali solution to the porous boron nitride is (10-20) to 1 mL/g;
(6) adding a B-R buffer solution into the filtered slaughter wastewater supernatant to enable the pH value of the waste liquid to be 4-10, adding the prepared modified porous boron nitride, placing the mixed liquid into a vortex oscillator, carrying out suction filtration after oscillation adsorption for 5 hours to obtain filtrate after adsorption treatment; wherein the volume-mass ratio of the filtered slaughter wastewater supernatant to the modified porous boron nitride is (100-): 110: 1 mL/g;
(7) compared with the supernatant of slaughter wastewater before and after adsorption, the removal rate of protein is as high as 80-90%.
2. The method for removing proteins in slaughter wastewater using modified porous boron nitride according to claim 1, wherein the molar ratio of melamine to boric acid in step (1) is 1:2, and ammonium sulfate is added in an amount of 30 wt% based on the total mass of the mixture of melamine, boric acid and ammonium sulfate.
3. The method for removing proteins in slaughter wastewater using modified porous boron nitride according to claim 1, wherein the protective atmosphere in step (3) is nitrogen or ammonia gas, and the gas flow rate is 50-300 mL/min.
4. The method for removing proteins in slaughter wastewater using modified porous boron nitride according to claim 1, wherein the 5% acid solution in step (5) is 5% nitric acid aqueous solution and the 5% alkaline solution is 5% sodium hydroxide aqueous solution.
5. The method for removing proteins from slaughter wastewater using modified porous boron nitride according to claim 1, wherein the vortex oscillator in step (6) is rotated at 180rpm and the oscillation temperature is 20-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005624.4A CN112108104A (en) | 2020-09-23 | 2020-09-23 | Method for removing proteins in slaughter wastewater by using modified porous boron nitride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005624.4A CN112108104A (en) | 2020-09-23 | 2020-09-23 | Method for removing proteins in slaughter wastewater by using modified porous boron nitride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112108104A true CN112108104A (en) | 2020-12-22 |
Family
ID=73801009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011005624.4A Pending CN112108104A (en) | 2020-09-23 | 2020-09-23 | Method for removing proteins in slaughter wastewater by using modified porous boron nitride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112108104A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031170A (en) * | 2005-07-22 | 2007-02-08 | National Institute For Materials Science | Boron nitride-based porous body and its manufacturing method |
| CN102992548A (en) * | 2012-12-06 | 2013-03-27 | 山东名科环保工程有限公司 | Method for treating low-temperature slaughter wastewater |
| CN107352756A (en) * | 2017-09-04 | 2017-11-17 | 西南科技大学 | Using the method for CSTR coagulating sedimentation A/O technical finesse slaughtering wastewaters |
| CN109706549A (en) * | 2018-12-28 | 2019-05-03 | 沈阳航空航天大学 | A kind of preparation method and application of NEW TYPE OF COMPOSITE boron nitride adsorbent material |
| CN110201628A (en) * | 2019-05-29 | 2019-09-06 | 沈阳航空航天大学 | A kind of doping boron nitride and preparation method thereof removing heavy metal in high-temperature flue gas |
| CN110586022A (en) * | 2019-09-18 | 2019-12-20 | 沈阳航空航天大学 | Method for removing fatty acid from textile industrial wastewater by using acid-base modified porous boron nitride |
-
2020
- 2020-09-23 CN CN202011005624.4A patent/CN112108104A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007031170A (en) * | 2005-07-22 | 2007-02-08 | National Institute For Materials Science | Boron nitride-based porous body and its manufacturing method |
| CN102992548A (en) * | 2012-12-06 | 2013-03-27 | 山东名科环保工程有限公司 | Method for treating low-temperature slaughter wastewater |
| CN107352756A (en) * | 2017-09-04 | 2017-11-17 | 西南科技大学 | Using the method for CSTR coagulating sedimentation A/O technical finesse slaughtering wastewaters |
| CN109706549A (en) * | 2018-12-28 | 2019-05-03 | 沈阳航空航天大学 | A kind of preparation method and application of NEW TYPE OF COMPOSITE boron nitride adsorbent material |
| CN110201628A (en) * | 2019-05-29 | 2019-09-06 | 沈阳航空航天大学 | A kind of doping boron nitride and preparation method thereof removing heavy metal in high-temperature flue gas |
| CN110586022A (en) * | 2019-09-18 | 2019-12-20 | 沈阳航空航天大学 | Method for removing fatty acid from textile industrial wastewater by using acid-base modified porous boron nitride |
Non-Patent Citations (3)
| Title |
|---|
| SHUJUN YU ET AL.: ""Boron nitride-based materials for the removal of pollutants from aqueous solutions:A review"" * |
| 翟振宇: ""多孔氮化硼的制备、活化及其重金属高温吸附特性研究"" * |
| 翟振宇: ""多孔氮化硼的制备、活化及其重金属高温吸附特性研究"", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107694510B (en) | Method for removing methylene blue in printing and dyeing wastewater by two-dimensional magnetic MXene | |
| CN102659221B (en) | Electro-catalytic oxidation material for wastewater treatment, preparation method and application | |
| CN105236507A (en) | Method for removing hexavalent chromium in wastewater by using beta-cyclodextrin chitosan and walnut shell biochar compounded adsorbent | |
| CN111807453A (en) | Modified biochar for adsorbing phosphorus in water body and preparation method and application thereof | |
| CN109046229B (en) | Lanthanum hydroxide modified hydroxyapatite material and preparation method and application thereof | |
| CN111592069A (en) | Modified diatomite-nano calcium hydroxide composite sewage treatment agent | |
| CN106943835B (en) | Method for preparing air purification material and compound fertilizer by using sludge and livestock and poultry manure | |
| CN107758823B (en) | Domestic sewage treatment agent and preparation method thereof | |
| CN111499000B (en) | Constructed wetland filler and preparation method thereof | |
| CN113908811A (en) | Preparation method of biomass charcoal material for removing phosphorus from sewage | |
| CN112473733B (en) | Mo-Eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and application thereof | |
| CN113828285A (en) | Filter material for deep treatment of low-concentration fluorine-containing wastewater and preparation method thereof | |
| CN110523378B (en) | Application of cyanobacteria mud in algae-water separation station in preparation of biomass activated carbon and in tail water algal toxin adsorption | |
| CN107043146B (en) | Method for preparing composite water treatment agent by using cow dung | |
| CN109896574B (en) | Carbon ferrite-titanium oxide multifunctional water purification material and preparation method thereof | |
| CN112108104A (en) | Method for removing proteins in slaughter wastewater by using modified porous boron nitride | |
| CN113912182B (en) | Application of plant-based solid-liquid mixed carbon source | |
| CN110624496B (en) | Preparation method of porous boron nitride-based composite material for purifying organic wastewater | |
| CN113332971A (en) | Nano ZnO/g-C3N4Application of composite catalyst as algae inhibitor and preparation method thereof | |
| CN112191222A (en) | Modified medical stone filter material for treating ammonia nitrogen industrial wastewater and preparation method thereof | |
| CN113526636A (en) | Efficient sewage treatment medicament and preparation method thereof | |
| CN112295547A (en) | Preparation method of fly ash/carboxymethyl cellulose/chitosan composite material | |
| CN116673003B (en) | Adsorbent for sewage treatment and preparation method and application thereof | |
| CN108940205A (en) | The scavenging material of metal ion in a kind of recycling industrial wastewater | |
| CN115043482B (en) | Method for treating livestock and poultry breeding wastewater by persulfate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201222 |