CN114990165A - Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash - Google Patents
Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash Download PDFInfo
- Publication number
- CN114990165A CN114990165A CN202210582386.6A CN202210582386A CN114990165A CN 114990165 A CN114990165 A CN 114990165A CN 202210582386 A CN202210582386 A CN 202210582386A CN 114990165 A CN114990165 A CN 114990165A
- Authority
- CN
- China
- Prior art keywords
- iron
- dust
- steel smelting
- sludge
- anaerobic digestion
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 239000000428 dust Substances 0.000 title claims abstract description 91
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
- 239000010959 steel Substances 0.000 title claims abstract description 79
- 238000003723 Smelting Methods 0.000 title claims abstract description 74
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 70
- 239000010802 sludge Substances 0.000 title claims abstract description 67
- 230000029087 digestion Effects 0.000 title claims abstract description 62
- 239000010806 kitchen waste Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 238000011081 inoculation Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 244000005700 microbiome Species 0.000 description 15
- 239000011573 trace mineral Substances 0.000 description 10
- 235000013619 trace mineral Nutrition 0.000 description 10
- 150000007524 organic acids Chemical class 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000027756 respiratory electron transport chain Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000004060 metabolic process Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 239000011785 micronutrient Substances 0.000 description 3
- 235000013369 micronutrients Nutrition 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 235000013980 iron oxide Nutrition 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009342 intercropping Methods 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000021062 nutrient metabolism Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 239000002680 soil gas Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of energy utilization of solid wastes, and particularly relates to a method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and ash. The method comprises the following steps: (1) collecting dust and sludge ash in the steel smelting process, drying, crushing and sieving to form powder; (2) mixing the kitchen waste and the iron and steel smelting dust and ash powder, and adding the mixture into an anaerobic digestion reactor; (3) in the anaerobic digestion reactor, anaerobic digestion is carried out to produce methane. The iron and steel smelting dust and sludge are wide in source and easy to obtain, can promote anaerobic digestion of the kitchen waste to produce methane, and effectively overcomes the defect of cost increase caused by additional investment of additives in the anaerobic digestion process. The invention conforms to the concept of 'treating wastes with wastes', effectively reduces the environmental problems caused by the iron and steel smelting dust, the sludge and the kitchen wastes, provides a new method for resource utilization of the iron and steel smelting dust, the sludge and the kitchen wastes, brings higher economic, social and environmental benefits and has industrial application potential.
Description
Technical Field
The invention belongs to the field of energy utilization of solid wastes, and particularly relates to a method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and ash.
Background
With the continuous development of economy and the continuous increase of population in China, the yield of the kitchen waste is increased year by year. At present, the annual output of kitchen waste in China is as high as 1.2-1.3 hundred million tons. If not disposed of, it can cause serious water-soil-gas combined pollution. The kitchen waste is rich in easily biodegradable components such as carbohydrate, protein, lipid and the like, can be converted into methane (the main component is methane) by an anaerobic digestion technology, synchronously realizes pollution control and resource energy utilization of the kitchen waste, and has wide prospect. However, a large number of studies show that the kitchen waste anaerobic digestion methane production system is easily inhibited by organic acid accumulation, and the kitchen waste lacks a plurality of trace elements necessary for growth and metabolism of anaerobic microorganisms, so that the anaerobic microorganisms have poor activity, the system stability is poor, and the methane yield is not high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash, which comprises the following steps:
(1) collecting dust and sludge ash in the steel smelting process, drying, crushing and sieving to form powder, preferably, sieving by adopting a 100-300-mesh sieve.
The dust and sludge in the steel smelting process is dust and sludge in different process links in the steel smelting process, for example, the dust and sludge comprises one or more of sintering dust, blast furnace dust and sludge, converter dust, electric furnace dust and steel rolling sludge, and the dust and sludge are dried, crushed and sieved after being fully and uniformly mixed.
The dust and the mud actually generated in different process links in the steel smelting process can be mixed according to the proportion of the dust and the mud actually generated in different process links in the steel smelting process, namely, the dust and the mud actually generated in different process links in the steel smelting process can be directly mixed together without too much screening or weighing process.
(2) Mixing the kitchen waste and the iron and steel smelting dust and ash powder, and adding the mixture into an anaerobic digestion reactor. In order to achieve a good anaerobic digestion effect, the adding amount of the iron and steel smelting dust and sludge in the kitchen waste is 10-40 g/L, meanwhile, the materials in the anaerobic digestion reactor can be diluted by adding water until the solid content of the system is 10-20%, the pH value is adjusted to be neutral (6.8-7.2), and the pH value is not controlled in the subsequent anaerobic digestion process.
The kitchen waste can be separated to remove the components which are difficult to be biodegraded (such as bones, fishbones, paper towels and the like) by separation, and then is prepared into homogeneous slurry, and then is mixed with the iron and steel smelting dust and sludge.
(3) In the anaerobic digestion reactor, anaerobic digestion is carried out to produce methane.
Controlling the anaerobic digestion reaction temperature at 30-40 ℃, the stirring frequency at 120-150 rpm, the organic load at 5-25 gVS/L, and the inoculation ratio of the inoculation mud to the kitchen waste at 1: 1-2: 1, the anaerobic digestion time is 25-40 days.
The iron and steel smelting dust and sludge ash comes from different process links in the iron and steel smelting process and mainly comprises sintering ash, blast furnace dust and sludge, converter dust and sludge, electric furnace dust and steel rolling sludge, and the components of the iron and steel smelting dust and sludge contain a large amount of SiO 2 、Fe 2 O 3 、Fe 3 O 4 、Al 2 O 3 Metal oxides such as CaO, MgO, MnO, etc., alkaline components, and various trace elements of metals such as Co, Cr, Cu, Ni, Pb, etc. The iron and steel smelting dust and sludge ash are added into a kitchen waste anaerobic digestion methane production system as an additive, on one hand, a large amount of alkaline components in the iron and steel smelting dust and sludge ash are utilized, the alkalinity and the buffer capacity of the kitchen waste anaerobic system can be obviously improved, and the problem of system acidification caused by quick hydrolysis of organic matters in the kitchen waste is effectively solved. On the other hand, abundant metal trace elements in the iron and steel smelting dust and sludge can provide sufficient micronutrients for anaerobic microorganisms, effectively improve the activity of the microorganisms, particularly methanogens, and improve the yield of methane. In addition, the iron and steel smelting dust contains various conductive componentsSuch as Fe and Fe oxide, can mediate direct electron transfer between bacteria and methanogens, improve the efficiency of the inter-species electron transfer, promote the intercropping metabolism of organic acid, avoid the accumulation of organic acid, and obviously improve the system stability and the methane yield.
The invention has the beneficial effects that:
(1) the raw materials of the iron and steel smelting dust, the sludge and the kitchen waste adopted by the invention have high yield and are easy to obtain, thereby being beneficial to large-scale popularization and utilization.
(2) The iron and steel smelting dust and sludge ash comes from different process links in the iron and steel smelting process and mainly comprises sintering ash, blast furnace dust and sludge, converter dust, electric furnace dust, steel rolling sludge and the like, and the components of the iron and steel smelting dust and sludge ash contain a large amount of SiO 2 、Fe 2 O 3 、Fe 3 O 4 、Al 2 O 3 Metal oxides such as CaO, MgO, MnO, etc., alkaline components, and various trace elements of metals such as Co, Cr, Cu, Ni, Pb, etc. Iron and iron oxides in the iron and steel smelting dust have good conductivity, direct electron transfer between bacteria and methanogens can be mediated, direct interspecific electron transfer between anaerobic microorganisms in the organic acid intertriginous metabolic process is promoted, interspecific electron transfer efficiency is strengthened, then the interspecific metabolism of the organic acid is promoted, organic acid accumulation is avoided, and system stability and methane yield are remarkably improved.
(3) The iron and steel smelting dust contains abundant alkaline metal oxide components such as CaO, MgO and Al 2 O 3 The kitchen waste anaerobic digestion system has the advantages that a large amount of organic acid generated in the kitchen waste anaerobic digestion process can be neutralized, the pH value of the anaerobic system is stabilized, the system acidification is prevented from inhibiting the microbial activity, the alkalinity and the buffer capacity of the kitchen waste anaerobic system are obviously improved, the system acidification problem caused by quick hydrolysis of organic matters of the kitchen waste is effectively relieved, the system stability is improved, and the methane production performance of the kitchen waste anaerobic digestion is enhanced.
(4) The dust and ash of iron and steel smelting contains rich metal trace elements, such as Fe, Co, Ni, Cu, Zn, Mn and other elements, which are necessary for the growth and metabolism of anaerobic microorganisms. The abundant metal trace elements in the iron and steel smelting dust can provide sufficient micronutrients for anaerobic microorganisms, effectively improve the activity of the microorganisms, particularly methanogens, improve the yield of methane, do not need to additionally add metal trace element additives, and save the cost.
(5) The surfaces of the iron and steel smelting dust and ash particles are usually in an irregular shape, which is beneficial to the attachment of microorganisms, provides good growth carriers and microenvironment for anaerobic microorganisms, and is beneficial to the enrichment and growth of the anaerobic microorganisms.
(6) The method reasonably utilizes waste substances, adds the iron and steel smelting dust and sludge ash into the anaerobic digestion methane production system of the kitchen waste, provides a new method for synchronously realizing the resource utilization of the iron and steel smelting dust and sludge ash and efficiently strengthening the anaerobic digestion methane production of the kitchen waste, effectively reduces the discharge of waste, reduces the pollution to the environment, and accords with the concept of treating waste by waste.
Drawings
FIG. 1 is a schematic view of the process flow of the invention for enhancing anaerobic digestion of kitchen waste to produce methane by using iron and steel smelting dust and sludge ash.
Detailed Description
The invention is further described below with reference to the drawings and experimental examples.
Example 1
A method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash is shown in figure 1 and comprises the following steps:
(1) collecting dust and sludge ash of different process links in the steel smelting process, and according to the amount of dust and sludge actually produced in different process links in the steel smelting process, uniformly mixing and drying 14% of sintering ash, 28% of blast furnace dust and sludge, 21% of converter dust and sludge, 30% of electric furnace dust and 7% of steel rolling sludge, grinding the mixture through a 200-mesh sieve to obtain powder for later use.
The main element components and contents of the adopted iron and steel smelting dust and sludge ash are shown in the table 1. The types and contents of metallic trace elements in the iron and steel smelting dust are shown in Table 2.
TABLE 1 iron and steel smelting dust and sludge ash main element composition and content
TABLE 2 kinds and contents of trace elements in dust and sludge from iron and steel smelting
(2) The water content of the kitchen waste applied in the embodiment is 75%, the content of organic matters in solid components is 85%, and the pH value is 4.5. And (3) sorting the kitchen waste to remove impurities and preparing homogeneous kitchen waste serous fluid.
Mixing the kitchen waste slurry and the iron and steel smelting dust and sludge ash powder, and adding the mixture into an anaerobic digestion reactor; the adding amount of the iron and steel smelting dust and sludge is 25g/L, water is added for dilution until the solid content of the system is 15%, and NaOH solution with the concentration of 1mol/L is used for adjusting the pH value to 7.0.
(3) With N 2 And purging the anaerobic digestion reactor for 2min to ensure that the reaction system reaches a sufficient anaerobic condition, and carrying out anaerobic digestion to produce methane after sealing the anaerobic digestion reactor. The inoculated sludge for anaerobic digestion is taken from an anaerobic digestion tank of a sludge treatment plant, and the anaerobic digestion conditions are as follows: the organic load is 25gVS/L, and the inoculation ratio of the inoculation mud to the kitchen waste is 1: 1, the stirring frequency is 150rpm, the temperature is kept constant at 35 ℃, and the anaerobic digestion time is 28 days.
Comparative example
The difference from example 1 is that the anaerobic digestion was carried out directly with the same amount of kitchen waste without the addition of iron and steel smelting dust and sludge ash.
Compared with the comparative example, the anaerobic digestion of the kitchen waste has the advantages that the methane production effect is enhanced, and the total methane yield is increased by 35%.
Example 2
The method is the same as example 1, except that:
in the step (2), the adding amount of the dust, the mud and the ash in the iron and steel smelting process is 10 g/L; the total yield of methane digested by anaerobic digestion is increased by 20 percent compared with the comparative example.
Example 3
The method is the same as example 1, except that:
in the step (2), the adding amount of the dust, the mud and the ash in the iron and steel smelting process is 40 g/L; the total yield of methane digested by anaerobic digestion is increased by 32 percent compared with the comparative example.
Example 4
The method is the same as example 1, except that:
in the step (3), the organic load is 15 gVS/L; the total yield of methane digested by anaerobic digestion is increased by 25 percent compared with the comparative example.
Example 5
The method is the same as example 1, except that:
the organic load in the step (3) is 5 gVS/L; the total yield of methane digested by anaerobic digestion is increased by 5 percent compared with the comparative example.
As can be seen from comparison of the above examples, the iron and steel smelting dust and sludge ash powder is added into the kitchen waste anaerobic digestion methane production system, on one hand, a large amount of alkaline components such as CaO, MgO and Al in the iron and steel smelting dust and sludge ash are utilized 2 O 3 The alkalinity and the buffering capacity of the kitchen waste anaerobic system can be remarkably improved, the problem of system acidification caused by rapid hydrolysis of organic matters of the kitchen waste is effectively solved, when the organic load of anaerobic digestion of the kitchen waste is 5-25 gVS/L, the pH value of the system can be stabilized at 6.5-7.5 without adjusting the pH value in the anaerobic digestion process, and the cost of alkaline solution required for adjusting the pH value is reduced. On the other hand, abundant metal trace elements such as Fe, Co, Ni, Cu, Zn and Mn in the iron and steel smelting dust and sludge ash can provide sufficient micronutrients for anaerobic microorganisms, effectively improve the activity of the microorganisms, particularly methanogens, and improve the yield of methane. In addition, the iron and steel smelting dust contains various conductive components such as Fe and Fe oxides, and can mediate direct electron transfer between bacteria and methanogens, improve the efficiency of the electron transfer between species, promote the mutual nutrient metabolism of organic acids, avoid the accumulation of the organic acids, and obviously improve the system stability and the methane yield. The iron and steel smelting dust and sludge also provide good growth carriers and microenvironment for anaerobic microorganisms, and are beneficial to the enrichment and growth of the anaerobic microorganisms. Therefore, the methane yield of anaerobic digestion of the kitchen waste can be improved by 5-35%. By contrast, the preferable iron and steel smelting dust, mud and ash powder is sieved by a 200-mesh sieve, and the adding amount is 25 g/L. When 25g/L of iron and steel smelting dust, mud and ash powder which is sieved by a 200-mesh sieve is added, the kitchen wasteAnaerobic digestion methane production increased by 35% over that without addition.
The above is the preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several modifications and improvements can be made, such as the adjustment of temperature and time of anaerobic digestion process according to the numerical range in the summary of the invention, and these modifications and improvements should be considered as the protection scope of the present invention.
Claims (8)
1. A method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash is characterized by comprising the following steps:
(1) collecting dust and sludge ash in the steel smelting process, drying, crushing and sieving to form powder;
(2) mixing the kitchen waste and the iron and steel smelting dust and ash powder, and adding the mixture into an anaerobic digestion reactor;
(3) in the anaerobic digestion reactor, anaerobic digestion is carried out to produce methane.
2. The method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge according to claim 1, wherein the dust and sludge in the iron and steel smelting process is dust and sludge in different process steps in the iron and steel smelting process, and comprises one or more of sintering ash, blast furnace dust and sludge, converter dust and electric furnace dust and steel rolling sludge, and the dust and sludge are dried, crushed and sieved after being fully and uniformly mixed.
3. The method for producing methane by the anaerobic digestion of the kitchen waste through the iron and steel smelting dust and ash according to claim 2, wherein the iron and steel smelting dust and ash is mixed according to the proportion of the dust and the ash actually produced in different process links in the iron and steel smelting process.
4. The method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge according to claim 1, wherein in the step (1), the iron and steel smelting dust and sludge is sieved by a sieve of 100-300 meshes.
5. The method for producing methane by enhancing anaerobic digestion of kitchen waste with iron and steel smelting dust and sludge according to claim 1, wherein in the step (2), the kitchen waste is mixed with the iron and steel smelting dust and sludge after being sorted to remove impurities and being made into homogeneous slurry.
6. The method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge according to claim 1, wherein the adding amount of the iron and steel smelting dust and sludge in the kitchen waste in the step (2) is 10-40 g/L.
7. The method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge as claimed in claim 1, wherein in the step (2), the material in the anaerobic digestion reactor is diluted by adding water until the solid content of the system is 10% -20%, the pH value is adjusted to 6.8-7.2, and the pH value is not controlled in the subsequent process.
8. The method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash according to claim 1, wherein in the step (3), the anaerobic digestion reaction temperature is controlled to be 30-40 ℃, the stirring frequency is 120-150 rpm, the organic load is 5-25 gVS/L, and the inoculation ratio of the inoculation sludge to the kitchen waste is 1: 1-2: 1, the anaerobic digestion time is 25-40 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210582386.6A CN114990165A (en) | 2022-05-26 | 2022-05-26 | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210582386.6A CN114990165A (en) | 2022-05-26 | 2022-05-26 | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114990165A true CN114990165A (en) | 2022-09-02 |
Family
ID=83028297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210582386.6A Pending CN114990165A (en) | 2022-05-26 | 2022-05-26 | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114990165A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115502188A (en) * | 2022-10-19 | 2022-12-23 | 北京时代桃源环境科技股份有限公司 | Exogenous additive and application thereof in anaerobic digestion of kitchen waste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967481A (en) * | 2016-06-16 | 2016-09-28 | 安徽工业大学 | Composite ingredient for prompting anaerobic fermentation of cow dung to produce methane |
| CN107604008A (en) * | 2017-09-26 | 2018-01-19 | 北京科技大学 | A kind of method added slag and make acidifying production natural pond system recover aerogenesis |
| CN108384813A (en) * | 2018-03-26 | 2018-08-10 | 北京化工大学 | A kind of method of calcium oxide and biogas slurry combined pretreatment raising rice straw anaerobic digestion gas production performance |
| CN109266690A (en) * | 2018-09-11 | 2019-01-25 | 常州大学 | A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas |
-
2022
- 2022-05-26 CN CN202210582386.6A patent/CN114990165A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967481A (en) * | 2016-06-16 | 2016-09-28 | 安徽工业大学 | Composite ingredient for prompting anaerobic fermentation of cow dung to produce methane |
| CN107604008A (en) * | 2017-09-26 | 2018-01-19 | 北京科技大学 | A kind of method added slag and make acidifying production natural pond system recover aerogenesis |
| CN108384813A (en) * | 2018-03-26 | 2018-08-10 | 北京化工大学 | A kind of method of calcium oxide and biogas slurry combined pretreatment raising rice straw anaerobic digestion gas production performance |
| CN109266690A (en) * | 2018-09-11 | 2019-01-25 | 常州大学 | A kind of method of organic waste anaerobism-pyrolysis coupling richness production capacity source gas |
Non-Patent Citations (4)
| Title |
|---|
| 冯磊等: "有机负荷调控对餐厨垃圾高温固态发酵全过程影响", 《环境科学学报》, vol. 40, no. 6, 25 May 2020 (2020-05-25), pages 2168 - 2174 * |
| 刘金明等: "《基于近红外光谱的厌氧发酵关键信息快速检测方法研究》", 30 June 2021, 哈尔滨工程大学出版社, pages: 14 * |
| 石思慧等: "添加铁氧化物和活性炭对玉米秸秆两相厌氧消化 性能和微生物学特性影响研究", 《北京化工大学学报( 自然科学版)》, vol. 47, no. 5, pages 89 - 96 * |
| 邹惠等: "添加钢渣恢复厌氧消化酸化系统提高沼气产量", 《农业工程学报》, vol. 34, no. 17, pages 229 - 234 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115502188A (en) * | 2022-10-19 | 2022-12-23 | 北京时代桃源环境科技股份有限公司 | Exogenous additive and application thereof in anaerobic digestion of kitchen waste |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110330200B (en) | Method for promoting anaerobic digestion process and improving methanogenesis efficiency by CNTs-Ni-Fe3O4 | |
| CN110157747B (en) | Method for treating and recycling kitchen waste | |
| CN105837005B (en) | Municipal biological dewatered organic conditioner of excess sludge and preparation method thereof | |
| CN111424056B (en) | Method for improving efficiency of anaerobic digestion biogas production of kitchen waste | |
| CN101913747B (en) | Method for producing methane by combination fermentation of paper mill sludge and food waste | |
| CN101492223B (en) | Treatment process for sewage water generated from medium-low temperature carbonization of coal | |
| CN110950520A (en) | Multiphase solid waste treatment method | |
| CN114990165A (en) | Method for producing methane by enhancing anaerobic digestion of kitchen waste through iron and steel smelting dust and sludge ash | |
| WO2023024713A1 (en) | System and method for cooperative treatment of garden waste and kitchen waste | |
| CN1220559C (en) | Technique of two steps of anaerobic digestion for handling city garbage | |
| CN108424215A (en) | A kind of method of sludge and garden garbage efficient low-consume aerobic compost | |
| CN111440831A (en) | Method for enhancing kitchen waste anaerobic fermentation production of volatile fatty acid and dehydration performance by using eggshell conditioning and application thereof | |
| CN106365404A (en) | Method for promoting sludge anaerobic digestion to produce methane through red mud | |
| CN103936310B (en) | Utilize kitchen excess to improve cement slurry grindability and reduce TOC discharge method | |
| CN111334533A (en) | Method for producing volatile fatty acid by promoting anaerobic fermentation of office waste paper and sludge by cellulase | |
| CN110093377B (en) | Pretreatment method for improving dissolution efficiency of available organic matters in vinegar residue and anaerobic methane production potential of organic matters | |
| CN112794620B (en) | Method for removing moisture in wet garbage anaerobic fermentation biogas residues by utilizing furnace slag | |
| CN115197867B (en) | Biological regulator and method for sorting aluminum electrolysis carbon slag by using same | |
| CN114774476B (en) | Resource utilization method of beer thermal coagulum | |
| CN116283143B (en) | Method for preparing material of corrosion-resistant pipe sheet by using copper carbide slag | |
| CN210765037U (en) | Kitchen waste co-processing system | |
| CN107780278B (en) | Microbial treatment method for waste chips generated by setting off fireworks and crackers during spring festival | |
| CN117415144A (en) | Method for producing hydrogen by synergistic anaerobic digestion of municipal sludge and kitchen waste by iron-based catalyst | |
| CN115502188A (en) | Exogenous additive and application thereof in anaerobic digestion of kitchen waste | |
| CN116553717A (en) | Iron-attached carbon powder, preparation method and engineering application thereof |
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 |