CN115445573A - A method for modifying iron and aluminum of kitchen waste biochar - Google Patents
A method for modifying iron and aluminum of kitchen waste biochar Download PDFInfo
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title 1
- -1 iron ions Chemical class 0.000 claims abstract description 24
- 238000000197 pyrolysis Methods 0.000 claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- 239000010842 industrial wastewater Substances 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 2
- 239000010865 sewage Substances 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000008235 industrial water Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- 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
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- 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
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- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
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- 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
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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
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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Abstract
Description
技术领域technical field
本发明属于餐厨废弃物处理技术领域，具体涉及一种由厨废弃物来制备生物炭的方法，所制备的生物炭适用处理工业水。The invention belongs to the technical field of kitchen waste treatment, in particular to a method for preparing biochar from kitchen waste, and the prepared biochar is suitable for treating industrial water.
技术背景technical background
我国每年预计产生1.5亿吨餐厨废弃物，传统的餐厨废弃物资源化利用方式，如饲料化、肥料化和能源化等，其产生的经济价值均小于餐厨废弃物处理成本，不能实现资源高值化利用的目的；导致造成巨大的环境污染和资源浪费。my country is expected to produce 150 million tons of kitchen waste every year. The traditional resource utilization methods of kitchen waste, such as feed, fertilizer, and energy, generate economic value less than the cost of kitchen waste treatment and cannot be realized. The purpose of high-value utilization of resources; resulting in huge environmental pollution and waste of resources.
已有研究证明，以餐厨废弃物制备的生物炭虽然具有一定的孔隙结果，并具有一定的吸附能力，但因其在水中带负电荷，导致其对阴离子污染物和有机物吸附效率低。这限制了基于餐厨废弃物制备的生物炭在污水处理中的应用。因此，急需一种能提高餐厨废弃物基生物炭处理污水能力的方法。Studies have shown that although biochar prepared from kitchen waste has certain porosity and adsorption capacity, its adsorption efficiency for anionic pollutants and organic matter is low due to its negative charge in water. This limits the application of biochar prepared from kitchen waste in sewage treatment. Therefore, there is an urgent need for a method that can improve the ability of kitchen waste-based biochar to treat sewage.
发明内容Contents of the invention
本发明的目的是提供一种由餐厨废弃物来制备生物炭的方法，所制备的生物炭适用处理工业水，从而弥补现有技术的不足。The purpose of the present invention is to provide a method for preparing biochar from kitchen waste, and the prepared biochar is suitable for treating industrial water, so as to make up for the deficiencies in the prior art.
本发明首先提供一种由餐厨废弃物来制备的生物炭，是在液状的餐厨废弃物中加入铁离子Fe3+和铝离子Al3+进行处理，处理结束后，通过真空干燥处理使餐厨废弃物的含水量不高于10％，然后将干燥后的餐厨废弃物在氮气保护的条件下进行热解处理；热解产物冷却后粉碎制成本发明的生物炭；The present invention firstly provides a kind of biochar prepared from kitchen waste, which is processed by adding iron ion Fe 3+ and aluminum ion Al 3+ into the liquid kitchen waste. The water content of the kitchen waste is not higher than 10%, and then the dried kitchen waste is subjected to pyrolysis treatment under the condition of nitrogen protection; the pyrolysis product is cooled and pulverized to produce the biochar of the present invention;
所述铁离子Fe3+和铝离子Al3+的添加浓度为0.1-1.0M、0.25-0.75M；优选为0.5-0.6M、0.4-0.5M；The addition concentration of the iron ion Fe 3+ and aluminum ion Al 3+ is 0.1-1.0M, 0.25-0.75M; preferably 0.5-0.6M, 0.4-0.5M;
所述加入铁离子和铝离子，是通过添加氯化铁、氯化铝来实现的；Said adding ferric ion and aluminum ion is realized by adding ferric chloride, aluminum chloride;
所述的热解，是在270℃—600℃反应1-1.5小时，其中温度优选为300-330℃；The pyrolysis is to react at 270°C-600°C for 1-1.5 hours, wherein the temperature is preferably 300-330°C;
本发明还提供所制备的生物炭在处理废水中的应用；The present invention also provides the application of prepared biochar in wastewater treatment;
本发明另一个方面还提供一种处理工业废水的方法，是使用上述的生物炭来进行吸附处理。Another aspect of the present invention also provides a method for treating industrial wastewater, which is to use the above-mentioned biochar for adsorption treatment.
本发明所提供的餐厨废弃物制备的生物炭可显著提高餐厨废弃物处理污水的能力。The biochar prepared from the kitchen waste provided by the invention can significantly improve the ability of the kitchen waste to treat sewage.
附图说明Description of drawings
图1：制备的生物炭的照片图。Figure 1: Photographic view of the prepared biochar.
具体实施案例Specific implementation cases
本发明以餐厨废弃物来制备生物炭，从而有效的提高其资源价值的有效途径。生产的生物炭可广泛用于废水、废气处理，以及化学试剂、超级电容和食品添加剂等物质的制备。The invention is an effective way to prepare biochar from kitchen waste, thereby effectively improving its resource value. The produced biochar can be widely used in waste water and waste gas treatment, as well as in the preparation of chemical reagents, supercapacitors and food additives.
本发明所提供的餐厨废弃物来制备生物炭，餐厨废弃物的初始含水量超过70％，基本呈液体，或浆液状；然后在餐厨废弃物中加入铁离子和铝离子，混合均匀后，通过真空干燥处理使餐厨废弃物含水量不高于10％，然后在氮气保护的条件下进行热解处理；热解产物冷却后粉碎制成本发明的生物炭；其中添加的铁离子和铝离子的浓度分别达到0.1-1.0M、0.25-0.75MThe kitchen waste provided by the present invention is used to prepare biochar, the initial water content of the kitchen waste is more than 70%, and it is basically liquid or slurry; then iron ions and aluminum ions are added to the kitchen waste and mixed evenly Finally, through vacuum drying treatment, the water content of the kitchen waste is not higher than 10%, and then pyrolysis treatment is carried out under the condition of nitrogen protection; the pyrolysis product is cooled and pulverized to make the biochar of the present invention; the added iron ion and aluminum ion concentrations reach 0.1-1.0M, 0.25-0.75M, respectively
在本发明的一个实施例中，铁离子和铝离子，添加浓度优选为0.5-0.6M、0.4-0.5M；In one embodiment of the present invention, the added concentration of iron ions and aluminum ions is preferably 0.5-0.6M, 0.4-0.5M;
而热解处理，其温度要求为270℃—600℃，其中优选为300-330℃。For pyrolysis treatment, the temperature requirement is 270°C-600°C, preferably 300-330°C.
本发明所提供的生物炭可用于处理工业废水。The biochar provided by the invention can be used for treating industrial waste water.
下面结合实施例和附图对本发明进行详细的描述。The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.
实施例1：铁铝改性餐厨基生物炭的生产方法Embodiment 1: the production method of iron-aluminum modified kitchen-based biochar
餐厨废弃物取自名流环境科技股份有限公司食堂，其含水量约75％，进行破碎操作，再破碎后的餐厨废弃物中加入含有氯化铁和氯化铝的水溶液，其中铁离子Fe3+和铝离子Al3+浓度分别为0.5-0.6M和0.4-0.5M，搅拌均匀；再将上述液体或浆状物质通过真空干燥获得细颗粒状餐厨废弃物处理产物，处理产物的含水量为5％-8％。The kitchen waste is taken from the canteen of Mingliu Environmental Technology Co., Ltd., and its water content is about 75%. It is crushed, and an aqueous solution containing ferric chloride and aluminum chloride is added to the crushed kitchen waste, in which the iron ion Fe 3+ and aluminum ion Al 3+ concentrations were 0.5-0.6M and 0.4-0.5M respectively, and stirred evenly; then the above-mentioned liquid or slurry substance was vacuum-dried to obtain a fine-grained kitchen waste treatment product, and the content of the treatment product was The amount of water is 5%-8%.
将干燥的处理产物置入热解炉中，充入氮气以排除其中氧气。将热解炉以10℃/分钟的速度升高温度，将热解温度维持在300-330℃，在此温度进行热解反应1-1.5小时。反应结束后，自然冷却至室温。取热解产物生物炭，再粉碎至60目，即为铁铝改性餐厨基生物炭(图1)。Put the dried processed product into a pyrolysis furnace, and fill it with nitrogen to exclude oxygen. Raise the temperature of the pyrolysis furnace at a rate of 10°C/min, maintain the pyrolysis temperature at 300-330°C, and carry out the pyrolysis reaction at this temperature for 1-1.5 hours. After the reaction, it was naturally cooled to room temperature. Take the pyrolysis product biochar, and then crush it to 60 mesh, which is the iron-aluminum modified kitchen-based biochar (Figure 1).
另外制备对照样品，即除了不加入氯化铁和氯化铝外，其余步骤同上，制备得到普通餐厨基生物炭作为对照样品。In addition, a control sample was prepared, that is, except that ferric chloride and aluminum chloride were not added, the rest of the steps were the same as above, and ordinary kitchen-based biochar was prepared as a control sample.
实施例2：铁铝改性餐厨基生物炭处理工业废水能力的评估Example 2: Evaluation of the ability of iron-aluminum modified kitchen-based biochar to treat industrial wastewater
采用《LY/T 3279-2021工业水处理用活性炭技术指标及试验方法》中所列举试验方法，对铁铝改性餐厨基生物炭和普通餐厨基生物炭的碘吸附值、亚甲基蓝吸附值、铬(Cr6 +)去除力和化学需氧量(COD)去除率四个指标进行测定，并依据此标准的技术要求评估所制备的生物炭是否满足工业水处理用活性炭技术要求。铁铝改性的餐厨废弃物生物炭和未改性的餐厨废弃物生物炭均独立制备三次，并分别测定上述指标，取三次算数平均值，实验结果如表1所示。Using the test methods listed in "LY/T 3279-2021 Technical Indicators and Test Methods of Activated Carbon for Industrial Water Treatment", the iodine adsorption value and methylene blue adsorption value of iron-aluminum modified kitchen-based biochar and ordinary kitchen-based biochar , chromium (Cr 6 + ) removal power and chemical oxygen demand (COD) removal rate were measured, and according to the technical requirements of this standard, it was evaluated whether the prepared biochar could meet the technical requirements of activated carbon for industrial water treatment. The iron-aluminum modified kitchen waste biochar and the unmodified kitchen waste biochar were independently prepared three times, and the above indicators were measured respectively, and the arithmetic average of the three times was taken. The experimental results are shown in Table 1.
表1：铁铝改性对于餐厨废弃物制备生物炭处理工业废水能力的影响表Table 1: Effect of iron-aluminum modification on the ability of kitchen waste to prepare biochar for industrial wastewater treatment
表1的结果表明，本发明制备的铁铝改性的生物炭可提高以餐厨废弃物制备的生物炭处理工业废水的能力，所制备的改性生物炭达到优级品的要求。The results in Table 1 show that the iron-aluminum modified biochar prepared by the present invention can improve the ability of biochar prepared from kitchen waste to treat industrial wastewater, and the prepared modified biochar meets the requirements of superior products.
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Citations (6)
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| CN104084126A (en) * | 2014-07-09 | 2014-10-08 | 福建工程学院 | Preparation method of biomass-based ferroaluminium complex spherical carbon |
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