CN114177885A - Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof - Google Patents
Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof Download PDFInfo
- Publication number
- CN114177885A CN114177885A CN202111416463.2A CN202111416463A CN114177885A CN 114177885 A CN114177885 A CN 114177885A CN 202111416463 A CN202111416463 A CN 202111416463A CN 114177885 A CN114177885 A CN 114177885A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- biochar
- liquid material
- waste residue
- pig manure
- 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
- 239000011777 magnesium Substances 0.000 title claims abstract description 90
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 88
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 42
- 239000011574 phosphorus Substances 0.000 title claims abstract description 42
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000011344 liquid material Substances 0.000 title claims abstract description 40
- 239000002351 wastewater Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 46
- 210000003608 fece Anatomy 0.000 claims abstract description 42
- 239000010871 livestock manure Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 11
- 239000000084 colloidal system Substances 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000006227 byproduct Substances 0.000 claims abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 4
- 230000023556 desulfurization Effects 0.000 claims abstract description 4
- 239000003546 flue gas Substances 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 22
- 239000002910 solid waste Substances 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019092 Mg-O Inorganic materials 0.000 description 1
- 229910019395 Mg—O Inorganic materials 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- -1 phosphorus anions Chemical class 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- 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
-
- 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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of wastewater treatment and solid waste recycling, and discloses a magnesium-containing biochar liquid material for recovering phosphorus in pig farm wastewater, and a preparation method and application thereof. The magnesium-containing biochar liquid material is prepared by adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, uniformly mixing, drying, pyrolyzing the obtained solid at 600-700 ℃ in a protective atmosphere, and adding water into the obtained magnesium-containing waste residue modified pig manure biochar to grind in a colloid mill. The method can fully utilize the magnesium-containing waste residue of the flue gas desulfurization byproduct of the power plant to modify the pig manure biochar, and the pig manure biochar is ground into a liquid material to be applied to the advanced treatment of biochemical effluent of a pig farm, the phosphorus recovery rate reaches more than 99%, the adsorption capacity is more than 117mg/g, and the chroma removal rate reaches more than 87%.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment and solid waste resource utilization, and particularly relates to a magnesium-containing biochar liquid material for recovering phosphorus in pig farm wastewater, and a preparation method and application thereof.
Background
China is a large country for animal husbandry production, and in recent years, the proportion of large-scale pig farms is higher and higher, and a large amount of excrement waste is generated. At present, a black film biogas digester is mostly adopted in a large-scale pig farm to treat pig manure, and the effluent biogas slurry is subjected to biochemical treatment, so that the problems of unqualified phosphorus discharge, deep chromaticity and the like exist, water eutrophication is easily caused, and the survival of water animals is harmed. Therefore, it is necessary to further recover phosphorus resources. The method for recovering the phosphorus element by the adsorption method has low cost and simple operation, and is a promising method for recovering the phosphorus.
Biochar is a good adsorbing material, is obtained by pyrolyzing biomass under anoxic conditions, and can be produced from various raw materials, such as wood, agricultural wastes, sewage sludge, livestock and poultry manure, and the like. The biochar is rich in oxygen functional groups, low in production cost and has great potential in the aspect of environmental application. However, the biochar surface is generally negatively charged and therefore has a poor direct adsorption capacity for phosphorus, since phosphorus is present in the form of anions in aqueous solutions with a wide pH range. In order to make the biochar better adsorb phosphorus in water, currently, most of the biochar is modified by cations such as magnesium, calcium, aluminum, iron and the like, and surface functional group modification is carried out. The treatment can lead cations to be embedded into the surface of the biochar, and a cation bridge is constructed between the biochar and an adsorbate, so that the performance of the biochar for adsorbing phosphorus anions is greatly improved. However, the modification methods have the defects of high cost, complex process operation and the like, and the powdered biochar is easy to cause dust pollution when being applied. Therefore, the method for recovering phosphorus resource by using the modified biochar with low cost and simple operation is still necessary to be searched.
Magnesium-containing waste residues are byproducts of flue gas desulfurization by a magnesium method in a power plant, the main components of the magnesium-containing waste residues are magnesium sulfate and magnesium sulfite, but the magnesium-containing waste residues are discarded in large quantities due to complicated recycling, so that environmental pollution and resource waste are caused. The magnesium-containing waste residue is used as a magnesium source to modify the pig manure biochar, so that the phosphate adsorption performance of the biochar can be obviously improved. The industrial solid waste and the carbon-containing material are co-pyrolyzed to prepare the biochar, so that the phosphorus adsorption performance of the biochar can be obviously improved, the solid waste can be recycled, and the method is a way for sustainable development.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention provides a magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater. The material has a large adsorption area, can be quickly and uniformly dispersed into a water body during application, avoids dust pollution, and improves the adsorption efficiency of the biochar.
The invention also aims to provide a preparation method of the magnesium-containing biochar liquid material prepared by the method. The method is simple and easy to operate, has convenient material taking, can effectively utilize industrial solid waste and pig farm waste to recycle the industrial solid waste and the pig farm waste, and can effectively solve the problems of deep biochemical effluent chroma and water eutrophication of the pig farm.
The invention further aims to provide application of the magnesium-containing biochar liquid material prepared by the method.
The purpose of the invention is realized by the following technical scheme:
the magnesium-containing biochar liquid material is prepared by adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, uniformly mixing, drying, pyrolyzing the obtained solid at 600-700 ℃ under a protective atmosphere, and adding water into the obtained magnesium-containing waste residue modified pig manure biochar to grind in a colloid mill.
Preferably, the moisture content of the wet pig manure is 70-80%; the magnesium-containing waste residue powder is obtained by drying, grinding and sieving magnesium-containing waste residues which are byproducts of flue gas desulfurization of power plants, and the aperture of the sieve is 150-200 mu m.
Preferably, the weight ratio of the magnesium-containing waste residue powder to the wet pig manure is 1 (5-10).
Preferably, the volume ratio of the total mass of the magnesium-containing waste residue powder and the wet pig manure to water is 1g: 2 mL.
Preferably, the mass-to-water volume ratio of the magnesium-containing waste residue modified pig manure biochar is 1g (5-10) mL.
The preparation method of the magnesium-containing biochar liquid material for recovering phosphorus element in the pig farm wastewater comprises the following steps:
s1, adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, fully and uniformly mixing, and drying to obtain a solid;
s2, pyrolyzing the solid at 600-700 ℃ under a protective atmosphere to obtain magnesium-containing waste residue modified pig manure biochar;
and S3, adding water into the magnesium-containing waste residue modified pig manure biochar, and grinding in a colloid mill to obtain the magnesium-containing biochar liquid material.
Preferably, the drying temperature in the step S1 is 100-105 ℃.
Preferably, the pyrolysis time in the step S2 is 1-2 h, and the protective atmosphere is nitrogen or argon; the grinding time is 15-30 min.
The magnesium-containing biochar liquid material is applied to the field of advanced treatment of decoloration and dephosphorization of biochemical effluent of a pig farm.
The phosphorus removal rate of the magnesium-containing biochar liquid material in the water discharged from a pig farm reaches more than 99 percent, and the chroma removal rate reaches more than 87 percent.
The principle of the invention is as follows: the pig manure contains a large amount of volatile organic matters, has rich carbon source content which can reach 34 percent and is an ideal raw material for preparing the biochar; researches show that the Mg modified biochar can improve the phosphorus adsorption effect of the biochar, and phosphorus resources are recovered through the actions of adsorption, cation exchange, precipitation and the like; the biochar is mixed with water, is subjected to colloid milling and then is crushed into ultrafine particles, so that the adsorption active surface is greatly increased, the adsorption performance of the biochar is improved, the biochar is uniformly distributed in water, dust pollution can be avoided during application, the biochar can be rapidly dispersed into a water body, and the adsorption rate and effect are improved.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the biochar is prepared from the magnesium-containing waste residue powder and the pig manure through pyrolysis, Mg in the magnesium-containing waste residue powder is bonded on the biochar in a Mg-O or Mg-OH form, and through electrostatic attraction and Mg-P precipitation, the phosphate adsorption performance of the biochar from the pig manure is greatly improved, and meanwhile, the removal effect on chromaticity is achieved. The method is applied to advanced treatment of biochemical effluent in a pig farm, the phosphorus recovery rate (removal rate) is more than 99%, the adsorption capacity is more than 117mg/g, and the chroma removal rate is more than 87%, so that resource utilization of wastes is realized, and the problem of recycling pig manure and magnesium-containing waste residues is solved.
2. According to the invention, the pig manure biochar is ground in the colloid mill to obtain the magnesium-containing biochar liquid material, so that the adsorption area is increased, the liquid material can be rapidly and uniformly dispersed into a water body during application, dust pollution is avoided, and the biochar adsorption efficiency is improved.
3. The method has good effect of advanced treatment of the biochemical effluent from the pig farm for decolorization and dephosphorization, low cost, simple operation, large-scale production and wide prospect.
Drawings
FIG. 1 is a graph showing the relationship between the phosphorus adsorption amount of the liquid magnesium-containing biochar material of example 1 and the equilibrium concentration of phosphorus in wastewater.
Detailed Description
The following examples are presented to further illustrate the present invention and should not be construed as limiting the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Example 1
The embodiment provides a preparation method of a magnesium-containing biochar liquid material for recovering phosphorus element from pig farm wastewater, which comprises the following preparation steps:
(1) drying magnesium-containing waste residues collected from a power plant in a drying oven at 105 ℃, grinding the magnesium-containing waste residues to 100 meshes, adding magnesium-containing waste residue powder into wet pig manure with the water content of 70% according to the weight ratio of 1:5 to the dry weight of the pig manure, adding water according to the liquid-solid ratio of V: W of 2:1(mL: g), fully stirring the magnesium-containing waste residue powder and the wet pig manure, fully mixing the magnesium-containing waste residue powder and the wet pig manure, and drying the mixture at 105 ℃ for later use.
(2) And (2) putting the dried solid in the step (1) into a tubular furnace, taking nitrogen as protective gas, raising the temperature in the furnace to 600 ℃ at the speed of 10 ℃/min, keeping the temperature for 1h, and cooling to room temperature to obtain the magnesium modified pig manure biochar.
(3) And grinding the magnesium modified pig manure biochar in a colloid mill for 20min according to the W: V solid-to-liquid ratio of 1:10 to obtain the magnesium-containing biochar liquid material.
The liquid material containing magnesium biochar prepared in the embodiment is used for treating phosphorus-containing wastewater with the concentration of 200mg/L, 1g of biochar is added into each liter of wastewater in a conversion mode, the liquid material containing magnesium biochar is added, the pH value is adjusted to 9.5, and the liquid material is subjected to constant-temperature oscillation for 2 hours at room temperature. FIG. 1 is a graph showing the relationship between the phosphorus adsorption amount of the liquid magnesium-containing biochar material of example 1 and the equilibrium concentration of phosphorus in wastewater. As can be seen from FIG. 1, the phosphorus concentration of the effluent was 115.88mg/L, and the phosphorus adsorption amount of the liquid magnesium-containing biochar material was 84.12 mg/g. The adsorption capacity is increased along with the increase of the initial phosphorus concentration of the sewage, and the adsorption capacity can reach more than 117mg/L, which shows that the magnesium-containing biochar liquid material has higher adsorption capacity on phosphorus.
Example 2
The embodiment provides a preparation method of a biochar liquid material containing magnesium and recovering phosphorus in pig farm wastewater, which comprises the following preparation steps:
(1) drying magnesium-containing waste residue collected from a power plant in a drying oven at 105 ℃, grinding the magnesium-containing waste residue into 100 meshes, adding magnesium-containing waste residue powder into wet pig manure with the water content of 72 percent according to the weight ratio of the magnesium-containing waste residue powder to the dry weight of the pig manure of 1:8, adding water according to the liquid-solid ratio of V: W of 2:1(mL: g), fully stirring the magnesium-containing waste residue powder and the wet pig manure, fully mixing the magnesium-containing waste residue powder and the wet pig manure, and drying the mixture at 105 ℃ for later use.
(2) And (2) putting the dried solid in the step (1) into a tubular furnace, taking nitrogen as protective gas, raising the temperature in the furnace to 700 ℃ at the speed of 10 ℃/min, keeping the temperature for 1h, and cooling to room temperature to obtain the magnesium modified pig manure biochar.
(3) And (3) grinding the magnesium modified pig manure biochar in the step (2) in a colloid mill for 30min according to the W: V solid-to-liquid ratio of 1:5 (g: mL) to obtain the magnesium-containing biochar liquid material.
The magnesium-containing biochar liquid material prepared in the embodiment is adopted to carry out advanced treatment on pig farm SBR biochemical effluent, the magnesium-containing biochar liquid material is added in a conversion manner according to the proportion that 1.5g of biochar is added into each liter of biochemical effluent, the pH value is adjusted to be 9, and the mixture is subjected to constant-temperature oscillation for 2 hours at room temperature. Through the steps, the phosphorus removal rate of the effluent reaches over 99.42 percent, and the chroma removal rate reaches over 87 percent. The magnesium-containing biochar liquid material has higher recovery rate and chroma removal rate on phosphorus.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The magnesium-containing biochar liquid material is characterized in that the magnesium-containing biochar liquid material is prepared by adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, uniformly mixing, drying, pyrolyzing the obtained solid at 600-700 ℃ in a protective atmosphere, and adding water into the obtained magnesium-containing waste residue modified pig manure biochar to grind in a colloid mill.
2. The magnesium-containing biochar liquid material for recovering phosphorus from pig farm wastewater as claimed in claim 1, wherein the moisture content of the wet pig manure is 70-80%; the magnesium-containing waste residue powder is obtained by drying, grinding and sieving magnesium-containing waste residues which are byproducts of flue gas desulfurization of power plants, and the aperture of the sieve is 150-200 mu m.
3. The magnesium-containing biochar liquid material for recovering phosphorus from pig farm wastewater as claimed in claim 1, wherein the weight ratio of magnesium-containing waste residue powder to wet pig manure is 1 (5-10).
4. The magnesium-containing biochar liquid material for recovering phosphorus from pig farm wastewater as claimed in claim 1, wherein the volume ratio of the total mass of magnesium-containing waste residue powder and wet pig manure to water is 1g: 2 mL.
5. The magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater according to claim 1, wherein the mass and water volume ratio of the magnesium-containing waste residue modified pig manure biochar is 1g (5-10) mL.
6. The preparation method of the magnesium-containing biochar liquid material for recovering the phosphorus element in the pig farm wastewater according to any one of claims 1 to 5, which is characterized by comprising the following steps of:
s1, adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, fully and uniformly mixing, and drying to obtain a solid;
s2, pyrolyzing the solid at 600-700 ℃ under a protective atmosphere to obtain magnesium-containing waste residue modified pig manure biochar;
and S3, adding water into the magnesium-containing waste residue modified pig manure biochar, and grinding in a colloid mill to obtain the magnesium-containing biochar liquid material.
7. The method for preparing the biochar liquid material containing magnesium for recovering the phosphorus element in the wastewater of the pig farm according to claim 6, wherein the drying temperature in the step S1 is 100-105 ℃.
8. The method for preparing the biochar liquid material containing magnesium for recovering the phosphorus element from the pig farm wastewater as claimed in claim 6, wherein the pyrolysis time in the step S2 is 1-2 h, and the protective atmosphere is nitrogen or argon; the grinding time is 15-30 min.
9. The application of the magnesium-containing biochar liquid material disclosed by any one of claims 1 to 5 in the field of advanced treatment of decoloration and dephosphorization of biochemical effluent of pig farms.
10. The application of the magnesium-containing biochar liquid material in the field of advanced treatment of decoloration and dephosphorization of biochemical effluent of a pig farm according to claim 9 is characterized in that the phosphorus removal rate of the magnesium-containing biochar liquid material in the effluent of the pig farm is more than 99%, and the chromaticity removal rate is more than 87%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111416463.2A CN114177885A (en) | 2021-11-25 | 2021-11-25 | Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111416463.2A CN114177885A (en) | 2021-11-25 | 2021-11-25 | Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114177885A true CN114177885A (en) | 2022-03-15 |
Family
ID=80602595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111416463.2A Pending CN114177885A (en) | 2021-11-25 | 2021-11-25 | Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114177885A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114904480A (en) * | 2022-05-06 | 2022-08-16 | 华南农业大学 | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm |
| CN115999506A (en) * | 2022-11-04 | 2023-04-25 | 南京信息工程大学 | Magnesium modified pig manure biochar and application thereof in recycling nitrogen and phosphorus in pig wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109589938A (en) * | 2018-10-29 | 2019-04-09 | 华南农业大学 | It is a kind of to utilize Pig raising wastewater decolorising agent made of the waste of pig farm and its preparation method and application |
| CN109809631A (en) * | 2019-01-31 | 2019-05-28 | 华南农业大学 | A kind of method and its system improving pig farm biogas slurry phosphorus recovery efficiency |
| CN110255845A (en) * | 2019-07-09 | 2019-09-20 | 中国科学院城市环境研究所 | A kind of resource utilization method of pyrolyzing sludge charcoal |
| CN110270310A (en) * | 2019-07-25 | 2019-09-24 | 安徽农业大学 | A kind of synchronous high-efficiency recycles the preparation method and applications of the rich magnesium charcoal of nitrogen and phosphorus nutrient in farm's waste liquid |
-
2021
- 2021-11-25 CN CN202111416463.2A patent/CN114177885A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109589938A (en) * | 2018-10-29 | 2019-04-09 | 华南农业大学 | It is a kind of to utilize Pig raising wastewater decolorising agent made of the waste of pig farm and its preparation method and application |
| CN109809631A (en) * | 2019-01-31 | 2019-05-28 | 华南农业大学 | A kind of method and its system improving pig farm biogas slurry phosphorus recovery efficiency |
| CN110255845A (en) * | 2019-07-09 | 2019-09-20 | 中国科学院城市环境研究所 | A kind of resource utilization method of pyrolyzing sludge charcoal |
| WO2021003789A1 (en) * | 2019-07-09 | 2021-01-14 | 中国科学院城市环境研究所 | Resource utilization method of sludge pyrolysis biochar |
| CN110270310A (en) * | 2019-07-25 | 2019-09-24 | 安徽农业大学 | A kind of synchronous high-efficiency recycles the preparation method and applications of the rich magnesium charcoal of nitrogen and phosphorus nutrient in farm's waste liquid |
Non-Patent Citations (1)
| Title |
|---|
| 侯杰发: "镁改性牛龚生物炭对农田土壤磷吸附性能及其机理研究", 《中国优秀硕士学位论文全文数据库农业科技辑(月刊)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114904480A (en) * | 2022-05-06 | 2022-08-16 | 华南农业大学 | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm |
| CN115999506A (en) * | 2022-11-04 | 2023-04-25 | 南京信息工程大学 | Magnesium modified pig manure biochar and application thereof in recycling nitrogen and phosphorus in pig wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110240386B (en) | Straw and sludge cooperative treatment device and method | |
| CN110270310B (en) | Preparation method and application of magnesium-rich biochar for synchronously and efficiently recovering nitrogen and phosphorus nutrients in waste liquid of farm | |
| CN108927109B (en) | Method for modifying biochar by using phosphogypsum and application of biochar | |
| CN114177885A (en) | Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and preparation method and application thereof | |
| CN111659351B (en) | Modified biological carbon capable of simultaneously releasing silicon and adsorbing heavy metals efficiently and preparation method thereof | |
| CN110918055A (en) | Composite material for efficiently removing phosphorus in wastewater, preparation method and application thereof | |
| CN113321345A (en) | Method for simultaneously recovering phosphorus in water body and removing antibiotics based on sludge-based biochar | |
| CN109722264B (en) | Method for recovering phosphorus by hydrothermal carbonization of livestock and poultry manure | |
| CN113828361B (en) | Catalyst for recycling waste, preparation method thereof and application thereof in treatment of organic pollutants | |
| CN105906169B (en) | Handle the biological agent of sodium glutamate fermentation sewage | |
| CN111187124B (en) | Method for preparing eutrophic water body remediation material by using oil shale semi-coke and application | |
| CN109317099A (en) | A kind of preparation method and application of load iron pig manure charcoal | |
| CN108409407A (en) | It is a kind of from cultivation field waste in recycle phosphorus method and phosphate fertilizer | |
| CN109807164B (en) | Preparation method of high-molecular compound material crosslinked double-modified attapulgite and biomass charcoal filler | |
| CN104445192A (en) | Novel method for preparing activated carbon from cattle manure | |
| CN112980471B (en) | Method for improving content of sodium bicarbonate extracted phosphorus in animal manure biochar | |
| CN106732418A (en) | A kind of method for preparing magnetic adsorptive material as raw material with water hyacinth | |
| CN111085196B (en) | Method for preparing composite photocatalyst containing metal elementary substance particles from carbon-containing solid waste | |
| CN111943474B (en) | Method and device for graded utilization of livestock and poultry manure pyrolysis residues | |
| CN106995223B (en) | Pig farm wastewater advanced treatment and resource recycling method | |
| CN104045388A (en) | Use of charcoal as exogenous conditioning agent in sludge composting | |
| CN111704190A (en) | Treatment method for decoloring biomass gasification tar wastewater | |
| CN104085889B (en) | A kind of preparation method of granulated active carbon | |
| CN115784561A (en) | Method for preparing nutrient soil from domestic sludge in one minute | |
| CN114904480A (en) | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm |
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 |
Application publication date: 20220315 |
|
| RJ01 | Rejection of invention patent application after publication |