CN111548808A - Sludge biomass charcoal and preparation method and application thereof - Google Patents
Sludge biomass charcoal and preparation method and application thereof Download PDFInfo
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- CN111548808A CN111548808A CN201911301941.8A CN201911301941A CN111548808A CN 111548808 A CN111548808 A CN 111548808A CN 201911301941 A CN201911301941 A CN 201911301941A CN 111548808 A CN111548808 A CN 111548808A
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- 239000010802 sludge Substances 0.000 title claims abstract description 123
- 239000002028 Biomass Substances 0.000 title claims abstract description 84
- 239000003610 charcoal Substances 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000010865 sewage Substances 0.000 claims abstract description 71
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000013049 sediment Substances 0.000 claims abstract description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 17
- 239000011574 phosphorus Substances 0.000 claims abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000003213 activating effect Effects 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000000197 pyrolysis Methods 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 239000005416 organic matter Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 13
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 239000004912 1,5-cyclooctadiene Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 20
- 238000004062 sedimentation Methods 0.000 description 18
- 238000005273 aeration Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 125000001477 organic nitrogen group Chemical group 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 241000589651 Zoogloea Species 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/02—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by distillation
-
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/70—Catalyst aspects
- C10G2300/703—Activation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of biomass charcoal, in particular to sludge biomass charcoal and a preparation method and application thereof. The method comprises the following steps: heating and decomposing municipal sludge or river and lake sediment under an anoxic condition to obtain biomass charcoal; activating and modifying the decomposed biomass carbon by using an activating agent; drying and crushing the modified biomass charcoal to obtain the sludge biomass charcoal. The sludge biomass charcoal prepared by the method solves the problem that municipal sludge or bottom sludge of rivers and lakes are accumulated in large quantity and cannot be effectively utilized, and also solves the problem that municipal sewage is difficult to treat. When the sludge biomass charcoal is used for sewage treatment, soluble substances and suspended solid substances such as nitrogen, phosphorus, COD, heavy metals, organic pollutants and the like which are rich in urban sewage can be efficiently removed. The biomass charcoal is prepared from municipal sludge or river and lake sediment, so that the utilization rate of the sludge and the sediment is improved, waste is changed into valuable, energy is saved, and environmental pollution is reduced.
Description
Technical Field
The invention relates to the technical field of biomass charcoal, in particular to sludge biomass charcoal and a preparation method and application thereof.
Background
The development of social economy and the requirement on environmental protection are continuously improved, and higher requirements are put forward on the effluent of a sewage treatment plant. At present, the nitrogen and phosphorus indexes of the sewage treated by the conventional method hardly meet the effluent requirement, and the effluent of an urban sewage treatment plant needs to be further treated to remove suspended matters, soluble inorganic matters, heavy metals, organic matters and the like in the effluent so as to enable the effluent to reach the corresponding water quality standard. The number of municipal sewage plants is increasing, the scale is expanding and the output of the municipal sludge remaining as a by-product of sewage treatment is increasing due to the need for further treatment of sewage.
According to statistics, about 90% of sludge in China is not subjected to stabilization treatment, so that malodorous substances, pathogens, persistent organic pollutants and the like in the sludge are further diffused, and serious environmental pollution is caused. Meanwhile, the rapid development of the urban industry, the disordered discharge of industrial and domestic sewage for a long time, the serious pollution and siltation of rivers and lakes in cities, a large amount of pollutants are deposited in the bottom mud, so that the bottom mud is black and smelly, the timing desilting is needed, the silt contains a large amount of organic matters, the ecological environment is seriously damaged, and the physical and mental health of urban residents is threatened.
Therefore, how to effectively treat municipal sludge or river and lake sediment becomes a technical problem to be solved urgently in the field of environmental protection.
Disclosure of Invention
The invention aims to provide sludge biomass charcoal and a preparation method and application thereof, solve the problem that municipal sludge or river and lake sediment is accumulated in a large amount and cannot be effectively utilized at present, and solve the problem that municipal sewage rich in soluble substances such as nitrogen, phosphorus, heavy metals, organic pollutants and the like and suspended solid impurities is difficult to effectively treat.
The technical scheme for solving the technical problems is as follows:
a preparation method of sludge biomass charcoal comprises the following steps:
s1, heating and decomposing municipal sludge or river and lake sediment under an anoxic condition to obtain biomass charcoal;
s2, activating and modifying the decomposed biomass charcoal by using an activating agent;
and S3, drying the modified biomass charcoal and then crushing to obtain the sludge biomass charcoal.
Municipal sludge or municipal river and lake sediment is used as a raw material, the content of toxic and harmful substances is low, and a small amount of heavy metal and inorganic phosphorus in the sludge are basically solidified in the process of preparing biomass through anoxic high temperature. Leaching experiments show that heavy metals, soluble nitrogen and phosphorus are not detected in the sludge or bottom sludge leaching liquor. In addition, municipal sludge or river and lake sediment is used for preparing the biomass charcoal, so that local materials can be used, wastes are treated by wastes, and wastes are changed into valuables. Under the condition of oxygen deficiency, municipal sludge or municipal river and lake sediment are rapidly heated to a higher reaction temperature, so that the sludge or sediment can be decomposed to generate a large amount of coke products and byproducts such as synthesis gas and liquid coke. Modifying the biomass charcoal by using an activating agent, and drying and crushing to obtain the sludge biomass charcoal.
Further, step S1 specifically includes:
municipal sludge or river and lake sediment is decomposed at 500-600 ℃ for 2-4 hours.
At the high temperature of 500-600 ℃, municipal sludge or river and lake sediment are decomposed at high temperature for 2-4 hours, and the sludge or sediment is fully carbonized to form a large amount of biomass carbon.
Further, step S2 specifically includes:
activating the biomass charcoal subjected to pyrolysis by using an activating agent at 740-840 ℃;
the activating agent is one or more of water vapor or carbon dioxide.
The temperature is further improved, the internal structure of the biomass charcoal can be modified by steam or carbon dioxide gas, and the adsorption capacity of the biomass charcoal is improved. The modified biochar can adsorb soluble substances, nitrogen, phosphorus and the like in sewage, and nutrient salts of nitrogen, phosphorus and the like are used as nutrients of microorganisms, so that the microorganisms can utilize organic matters in the sewage more efficiently.
Further, step S3 specifically includes:
and (3) drying the modified biomass charcoal in air, crushing, and sieving with a 100-200-mesh sieve to obtain the sludge biomass charcoal with the particle size of 0.01-0.05 mm.
The adsorption capacity of the biomass charcoal containing more moisture is greatly reduced, and the biomass charcoal after air drying has strong adsorption capacity. The biomass charcoal is crushed into powder, so that the adsorption surface area of the biomass charcoal can be increased, and the adsorption effect is enhanced.
Furthermore, the municipal sludge or the bottom sludge of rivers and lakes contains 50 to 80 percent of organic matters and 1 to 5 percent of nitrogen and phosphorus.
The higher the organic matter content in municipal sludge or river and lake sediment, the more biomass charcoal is prepared. However, the mass ratio of organic matters in municipal sludge or bottom sludge of rivers and lakes is less than 80 percent. The content of nitrogen and phosphorus is 1% -5%, so that the content of nitrogen and phosphorus in the biomass charcoal can be kept at an extremely low level.
The sludge biomass charcoal prepared by the preparation method of any one of the above methods is also supposed to be within the protection scope of the present application, and the sludge biomass charcoal contains a large amount of carbon and plant nutrients, has a rich pore structure, a large specific surface area and a large number of oxygen-containing active groups on the surface. The biomass charcoal prepared by the method provided by the invention has strong capability of resisting water impact and good adsorption performance.
The sludge biomass charcoal prepared by the preparation method can be used for sewage treatment; specifically, the sludge biomass charcoal is added into the sewage, and the structure of the zoogloea is improved through adsorption and coagulation assistance, so that the concentration of the sludge in the sewage can be improved, and the soluble substances and suspended solid impurities such as nitrogen, phosphorus, COD, heavy metals, organic pollutants and the like in the sewage are further reduced. Meanwhile, the sludge biomass charcoal can reduce the specific resistance of sludge, improve the sludge dewatering performance and reduce the difficulty of treating the sludge in the sewage.
Further, the sewage treatment specifically comprises:
adding the sludge biomass charcoal into the sewage to be treated;
wherein the dry weight ratio of the sludge biomass charcoal to the sludge contained in the sewage is 1-5%.
When the sludge biomass charcoal is used for treating the municipal sewage, the operation mode is simple and convenient, and the sludge biomass charcoal only needs to be added into an aeration reaction tank for collecting the municipal sewage. The dry weight ratio of the addition amount of the sludge biomass charcoal to the sludge content in the sewage is 1-5%.
On the basis of the method, the application also provides a sewage treatment system, which specifically comprises: the device comprises a first sedimentation tank, an aeration reaction tank, a second sedimentation tank and a sludge reflux pump;
the first sedimentation tank is communicated with an aeration reaction tank through a water inlet pipeline, and the aeration reaction tank is communicated with the second sedimentation tank through a water outlet pipeline;
the second sedimentation tank is communicated with the water inlet pipeline through a water pipe, and the water pipe is provided with a sludge reflux pump and a feeding point.
The sludge biomass charcoal prepared by the invention is added into a water pipe through a feeding point, and under the action of a sludge reflux pump, the sludge biomass charcoal and the municipal sewage treated by the first sedimentation tank enter an aeration reaction tank together. And after being treated in the aeration reaction tank, the urban sewage enters a second sedimentation tank, and the urban sewage meeting the standard is discharged through the second sedimentation tank. Sludge and sludge biomass charcoal in the municipal sewage pass through the sludge reflux pump, so that cyclic utilization is realized.
Compared with the prior art, the invention has the beneficial effects that: according to the method, the biomass charcoal obtained by heating and decomposing municipal sludge or river and lake sediment under an anoxic condition is activated by using an activating agent, and is dried and crushed to obtain the sludge biomass charcoal. The biomass charcoal prepared by the method has strong capability of resisting water impact and good adsorption performance. Be applied to the sewage treatment system that this application provided with this mud biomass charcoal for when handling sewage, can high-efficiently handle dissolubility material and suspended solid matter such as nitrogen, phosphorus, COD, heavy metal, organic pollutant that are rich in the municipal sewage. The biomass charcoal is prepared from municipal sludge or river and lake sediment, so that the utilization rate of the sludge and the sediment is improved, waste is changed into valuable, energy is saved, and environmental pollution is reduced.
Drawings
FIG. 1 is a graph showing the effect of sewage treatment in example 1 and comparative example 1;
FIG. 2 is a graph showing a comparison between the effects of sewage treatment in example 2 and comparative example 2;
FIG. 3 is a schematic view of an integrated sewage treatment system according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a first sedimentation tank, a second sedimentation tank, an aeration reaction tank, a first sedimentation tank, a second sedimentation tank, a sludge reflux pump and a feeding point.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example 1
The residual sludge of the sewage plant A in Beijing is taken, the organic matter content of the residual sludge is 50 percent, and the nitrogen and phosphorus content of the residual sludge is 1 percent. At the high temperature of 500 ℃, the naturally dried sludge is placed under the anoxic state to carry out controlled pyrolysis on the naturally dried sludge. Controlling the pyrolysis time to be 2 hours to obtain the biomass charcoal. The obtained biomass charcoal is activated by water vapor at 740 ℃ to obtain modified sludge biochar, and the modified sludge biochar is naturally dried, ground and sieved by a 100-mesh sieve to obtain the sludge biochar with the particle size of 0.05mm, which is used as a sewage treatment enhancer.
Experiments were conducted in the Beijing A sewage plant, which employs an oxidation ditch process, designed at a scale of 5 million tons. Adding the biochar in a dry weight ratio of 1% to the municipal sewage excess sludge, adding the biochar to the front of a water suction pipe of a return sludge pump of a group of reaction tanks by adding 5, mechanically mixing the biochar and the water discharged from the first sedimentation tank 1, and feeding the biochar and the water into an aeration reaction tank 2, wherein the added sludge biochar can be used as the core of a zoogloea to improve the floc structure of the sludge. In example 1, indices of BOD5 (5-day biochemical oxygen demand), SS (suspended solid concentration), TN (total amount of various forms of inorganic and organic nitrogen in water) in the treated effluent were measured.
Comparative example 1
The control experiment was carried out in the Beijing A sewage plant. After being treated by the first sedimentation tank 1, the urban sewage enters the aeration reaction tank 2. The municipal sewage is treated in the aeration reaction tank 2 without adding sludge biochar. The effluent quality of the control group was monitored and the BOD5(5 day biochemical oxygen demand), SS (suspended solids concentration), TN (total amount of various forms of inorganic and organic nitrogen in the water) indices were recorded.
The physicochemical properties of the municipal sewage treated in example 1 were the same as those of the municipal sewage treated in comparative example 1. FIG. 1 is a graph showing the effect of sewage treatment in example 1 and comparative example 1.
Example 2
Taking B river sediment in Beijing, the organic matter content of the B river sediment is 80 percent, and the nitrogen and phosphorus content is 5 percent. At the high temperature of 600 ℃, the naturally dried sludge is placed in an anoxic state to carry out controlled pyrolysis on the sludge. And controlling the pyrolysis time to be 4 hours to obtain the biomass charcoal. The obtained biomass charcoal is activated by water vapor and carbon dioxide at 840 ℃ to obtain modified sludge biochar, and the modified sludge biochar is naturally air-dried, ground and sieved by a 200-mesh sieve to obtain the sludge biochar with the particle size of 0.01mm, which is used as a sewage treatment enhancer.
The added amount of the biochar and the amount of the urban sewage excess sludge are in a dry weight ratio of 5%, the biochar and the amount of the urban sewage excess sludge are added to a group of reaction tanks in front of water suction pipes of a return sludge pump, the biochar and the water discharged from a first sedimentation tank enter an aeration reaction tank through mechanical mixing, and the added sludge biochar can be used as the core of a zoogloea to improve the floc structure of sludge. In example 3, indices of BOD5 (5-day biochemical oxygen demand), SS (suspended solid concentration), TN (total amount of various forms of inorganic and organic nitrogen in water) in the treated effluent were measured.
Comparative example 2
Experiments are carried out in the Beijing A sewage plant, and the urban sewage to be treated enters an aeration reaction tank after being treated by a primary sedimentation tank. The municipal sewage is treated in the aeration reaction tank, and no sludge biochar is added in the process. The effluent quality of the control group was monitored and the BOD5(5 day biochemical oxygen demand), SS (suspended solids concentration), TN (total amount of various forms of inorganic and organic nitrogen in the water) indices were recorded.
The physicochemical properties of the municipal sewage treated in example 2 were the same as those of the municipal sewage treated in comparative example 2. FIG. 2 is a graph showing the effect of sewage treatment in example 2 and comparative example 2.
Example 3
The residual sludge of C sewage plant in Beijing is taken, the organic matter content is 65 percent, and the nitrogen and phosphorus content is 2.5 percent. At the high temperature of 550 ℃, the naturally dried sludge is placed in an anoxic state to carry out controlled pyrolysis on the sludge. Controlling the pyrolysis time to be 3 hours to obtain the biomass charcoal. The obtained biomass charcoal is activated by carbon dioxide at 800 ℃ to obtain modified sludge biochar, and the modified sludge biochar is naturally air-dried, ground and sieved by a 150-mesh sieve to obtain the sludge biochar with the particle size of 0.025mm, which is used as a sewage treatment enhancer.
Experiments were conducted in the Beijing C wastewater treatment plant. The added amount of the biochar and the amount of the urban sewage excess sludge are in a dry weight ratio of 2.5%, the biochar and the water are added to 5 parts of the water absorption pipes of a return sludge pump of a group of reaction tanks, the biochar and the water discharged from the first sedimentation tank 1 enter the aeration reaction tank 2 through mechanical mixing, and the added sludge biomass carbon can be used as the core of a zoogloea to improve the floc structure of the sludge. In example 1, indices of BOD5 (5-day biochemical oxygen demand), SS (suspended solid concentration), TN (total amount of various forms of inorganic and organic nitrogen in water) in the treated effluent were measured.
Comparative example 3
Experiments are carried out in the Beijing A sewage plant, and the urban sewage to be treated enters an aeration reaction tank after being treated by a primary sedimentation tank. The municipal sewage is treated in the aeration reaction tank, and no sludge biochar is added in the process. The effluent quality of the control group was monitored and the BOD5(5 day biochemical oxygen demand), SS (suspended solids concentration), TN (total amount of various forms of inorganic and organic nitrogen in the water) indices were recorded.
The physicochemical properties of the municipal sewage treated in example 3 were the same as those of the municipal sewage treated in comparative example 3
| Group of | BOD5 | SS | TN |
| Comparative example 3 | 13mg/L | 11mg/L | 16mg/L |
| Example 3 | 9mg/L | 9mg/L | 13mg/L |
Example 1 and comparative example 1 show that after the sludge biomass charcoal prepared by municipal sludge is added into a sewage treatment system, the biochemical oxygen demand of effluent 5 days is reduced to 9.5mg/L, the concentration of suspended solids is reduced to 9mg/L, and the total amount of various forms of inorganic and organic nitrogen in water is reduced to 13mg/L respectively.
Example 2 and comparative example 2 show that after the sludge biomass charcoal prepared by using the river sediment is added into a sewage treatment system, the biochemical oxygen demand of effluent 5 days is reduced to 9mg/L, the concentration of suspended solids is reduced to 8mg/L, and the total amount of various forms of inorganic and organic nitrogen in the water is respectively reduced to 14 mg/L.
Example 3 and comparative example 3 show that after the sludge biomass charcoal prepared by using the river sediment is added into a sewage treatment system, the biochemical oxygen demand of effluent 5 days is reduced to 9mg/L, the concentration of suspended solids is reduced to 9mg/L, and the total amount of various forms of inorganic and organic nitrogen in the water is reduced to 13mg/L respectively.
In conclusion, the biomass charcoal prepared by using municipal excess sludge or municipal river and lake sediment as raw materials is used for treating the municipal sewage, so that the content of suspended matters, nitrogen and phosphorus in the municipal sewage is reduced, and the effluent standard is improved. In addition, the biomass charcoal prepared by using the municipal excess sludge or the municipal river and lake sediment as the raw material has low cost, can realize the recycling of resources, and has important significance for the vigorous development of circular economy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The preparation method of the sludge biomass charcoal is characterized by comprising the following steps:
s1, heating and decomposing municipal sludge or river and lake sediment under an anoxic condition to obtain biomass charcoal;
s2, activating and modifying the decomposed biomass charcoal by using an activating agent;
and S3, drying the modified biomass charcoal and then crushing to obtain the sludge biomass charcoal.
2. The method for preparing mud biomass charcoal according to claim 1, wherein the step S1 specifically includes:
municipal sludge or river and lake sediment is decomposed at 500-600 ℃ for 2-4 hours.
3. The method for preparing mud biomass charcoal according to claim 1, wherein the step S2 specifically includes:
activating the biomass charcoal subjected to pyrolysis by using an activating agent at 740-840 ℃;
the activating agent is one or more of water vapor or carbon dioxide.
4. The method for preparing mud biomass charcoal according to claim 1, wherein the step S3 specifically includes:
and (3) drying the modified biomass charcoal in air, crushing, and sieving with a 100-200-mesh sieve to obtain the sludge biomass charcoal with the particle size of 0.01-0.05 mm.
5. The method for preparing the sludge biomass charcoal according to any one of claims 1 to 5, wherein the municipal sludge or the bottom sludge of rivers and lakes has an organic matter content of 50 to 80 percent and a nitrogen and phosphorus content of 1 to 5 percent.
6. Sludge biomass charcoal, characterized in that the sludge biomass charcoal is produced according to the production method of any one of claims 1 to 5.
7. Use of the sludge biomass charcoal prepared by the preparation method according to any one of claims 1 to 5 for sewage treatment.
8. The use of the sludge biomass charcoal according to claim 7, wherein the sewage treatment specifically comprises:
adding the sludge biomass charcoal into the sewage to be treated;
wherein the dry weight ratio of the sludge biomass charcoal to the sludge contained in the sewage is 1-5%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072057A (en) * | 2021-03-31 | 2021-07-06 | 河海大学 | Bottom mud covering material for eutrophic rivers and lakes and preparation method and use method thereof |
| CN113582312A (en) * | 2021-08-10 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Excess sludge modified inorganic-organic composite flocculant and preparation method and application thereof |
| CN118206254A (en) * | 2024-03-15 | 2024-06-18 | 大唐环境产业集团股份有限公司 | Method for preparing active organic matters of nitrogen-containing plants and controlling toxic byproducts by utilizing sludge and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810682A (en) * | 2012-08-17 | 2012-12-05 | 中国科学院广州能源研究所 | Microbial fuel cell and method for enhancing discharge voltage of microbial fuel cell using biochar |
-
2019
- 2019-12-17 CN CN201911301941.8A patent/CN111548808A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810682A (en) * | 2012-08-17 | 2012-12-05 | 中国科学院广州能源研究所 | Microbial fuel cell and method for enhancing discharge voltage of microbial fuel cell using biochar |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072057A (en) * | 2021-03-31 | 2021-07-06 | 河海大学 | Bottom mud covering material for eutrophic rivers and lakes and preparation method and use method thereof |
| WO2022205982A1 (en) * | 2021-03-31 | 2022-10-06 | 河海大学 | Sediment covering material for eutrophicated rivers and lakes, and preparation method and use method therefor |
| CN113072057B (en) * | 2021-03-31 | 2022-11-15 | 河海大学 | Bottom mud covering material for eutrophic rivers and lakes and preparation method and use method thereof |
| CN113582312A (en) * | 2021-08-10 | 2021-11-02 | 中交第二公路勘察设计研究院有限公司 | Excess sludge modified inorganic-organic composite flocculant and preparation method and application thereof |
| CN118206254A (en) * | 2024-03-15 | 2024-06-18 | 大唐环境产业集团股份有限公司 | Method for preparing active organic matters of nitrogen-containing plants and controlling toxic byproducts by utilizing sludge and application |
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