CN106512928B - A kind of sludge carbon and preparation method thereof for handling refuse leachate - Google Patents
A kind of sludge carbon and preparation method thereof for handling refuse leachate Download PDFInfo
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- CN106512928B CN106512928B CN201610850575.1A CN201610850575A CN106512928B CN 106512928 B CN106512928 B CN 106512928B CN 201610850575 A CN201610850575 A CN 201610850575A CN 106512928 B CN106512928 B CN 106512928B
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- 239000010802 sludge Substances 0.000 title claims abstract description 108
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000000149 chemical water pollutant Substances 0.000 claims abstract description 23
- 239000011592 zinc chloride Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000007598 dipping method Methods 0.000 claims description 25
- 239000010865 sewage Substances 0.000 claims description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- 239000003708 ampul Substances 0.000 claims description 16
- 239000010453 quartz Substances 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000012190 activator Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000197 pyrolysis Methods 0.000 claims description 9
- 239000012298 atmosphere Substances 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 8
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000010792 warming Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000004571 lime Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000004056 waste incineration Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 230000002572 peristaltic effect Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 15
- 230000004913 activation Effects 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000010801 sewage sludge Substances 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000000047 product Substances 0.000 description 21
- 239000003610 charcoal Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000001311 chemical methods and process Methods 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000011953 bioanalysis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- -1 Nitrogen-containing heterocycle compound Chemical class 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- 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
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of for handling the sludge carbon of landfill leachate, by using municipal sewage sludge as primary raw material, using ZnCl2Chemical activation method, in suitable activation temperature, activation time, ZnCl2Concentration, raw material granularity are prepared.The sludge carbon of this method preparation, when use, can not only handle landfill leachate, and high treating effect, processing cost is low, reduce the waste of energy consumption, and be conducive to environmental protection, economize on resources, be conducive to repay debt to society.It can be completed in a short time the removal of major pollutants, the present invention is easy to operate during processing, significant effect and stability is strong.
Description
Technical field
The invention belongs to technical field of waste water processing, are related to a kind of for handling the sludge carbon and sludge of refuse leachate
The preparation method of charcoal.
Background technique
Landfill leachate refers to the moisture that rubbish itself contains in refuse landfill, the sleet water into landfill yard
And other moisture, the saturation moisture capacity of rubbish, overburden layer is deducted, and undergo waste layer and overburden layer and a kind of high concentration for being formed
Organic wastewater.Landfill leachate has the characteristics that be different from general municipal sewage: BOD5 and COD concentration is high, tenor compared with
High, water quality and quantity variation greatly, the content of ammonia nitrogen it is higher, microbial nutrition element ratio is lacked of proper care etc..
From at present be seen in report the case where from the point of view of, waste incineration percolate treating process be mostly " pretreatment+biological treatment+
Advanced treating ".Biological treatment mostly uses anaerobic biological process+aerobe method as the main part in process flow.Percolate
It can remove most of easily biodegradable organics through biological treatment, and remaining refractory organic, advanced treating need to be carried out.It is deep
Degree processing part much uses membrane technology, especially nanofiltration (CNF), reverse osmosis (RO) or their combination technique.Film
The advantages that isolation technics has securely and reliably, easy to operate, and separative efficiency is high, can further remove as further treatment technique
The undegradable organic matter of biochemical system, COD, the polluters such as BOD reach design requirement for effluent index and provide safeguard.
It is the simplest method by percolate and municipal sewage merging treatment in the processing method of percolate.But it fills out
It buries field and is typically remote from cities and towns, therefore its percolate and municipal sewage merging treatment have certain specific difficulty, often have to certainly
Oneself is individually handled.The processing method of common landfill leachate includes physical-chemical process and bioanalysis.Physical-chemical process mainly has
Activated carbon adsorption, chemical precipitation, Density Separation, chemical oxidation, electronation, ion exchange, film dialysis, air lift and wet oxidation
A variety of methods such as method, when COD is 2000~40000mg/L, the COD removal rate of physical chemistry method is up to 50%~87%.And life
Object processing is compared, and materializing strategy is not influenced by water quality and quantity variation, and effluent quality is more stable, especially to BOD5/COD ratio
It is worth the landfill leachate that lower (0.07~0.20) is difficult to biological treatment, there is preferable treatment effect.But physical chemistry method is processed into
This is higher, is unsuitable for the processing of big yield landfill leachate.Use more in practice is biochemical method, and biological treatment is usual
Have the characteristics that reliable, economical and efficient, is the common method for handling landfill leachate.But the use of bioanalysis and efficiency can be because
A large amount of difficult to degrade, toxic organic compound presence in percolate and be restricted.Such as the landfill leachate after biochemical treatment
In there are still a large amount of phenols, cycloalkane, carboxylic acid type organics, it is necessary to could qualified discharge after advanced treating.Both at home and abroad
Scholar proposes many theory and methods to the advanced treating of landfill leachate, but these methods cut both ways, therefore search out
A kind of environmentally friendly, efficient, energy-efficient leachate treatment technology is significant
Active carbon is a kind of adsorbent that landfill leachate can be effectively treated, in municipal sewage plant, activated sludge
It is the byproduct that sewage disposal system generates, containing available resources such as a large amount of organic matter, humus, by certain processing
Afterwards, good adsorbent material can be converted to.Currently, its preparation process includes charing, two steps of activation.Gas activation (vapor
Method) it is to remove the hydrocarbon being fixed between the carbon skeleton of composition, form porous structure.Heating be since outside raw material,
Could be from table and inner formation micropore by considerable time, and new micropore cannot be formed, therefore number cells are limited.Also,
The sludge carbon handled using the above method, the content of beary metal in active sludge carbon is simultaneously compared with the content of beary metal in raw sewage
It does not substantially reduce, i.e., its adsorption capacity is limited to a certain degree, has seriously affected its extensive use.In addition, in processing rubbish
After percolate, often it is not thorough in the presence of absorption, discharge standard problem not up to standard.
In consideration of it, a kind of preparation method of sludge carbon is studied, while the method for the processing using its processing refuse leachate,
It is urgent problem to be solved of the present invention.
Summary of the invention
Therefore, technical problem to be solved by the present invention lies in above-mentioned technological deficiency in the prior art is overcome, to propose
A kind of preparation method of sludge carbon, while using the method for its processing for handling refuse leachate.
For this purpose, the present invention provides a kind of preparation method of sludge carbon, comprising the following steps:
S1, the sludge fetched from sewage plant is spontaneously dried at shady and cool ventilation, then the sludge after drying is put into electric heating
It is further dehydrated at 115-120 DEG C to constant weight in air dry oven；
S2, the sludge after drying and dehydrating then smashed it through into 60-70 mesh through pulverizer, with the 2.5- of solid-to-liquid ratio 1:5
The ZnCl of 3.5mol/L2Activator solution is mixed with dipping, and dipping temperature is 50-60 DEG C, dip time 48h；
S3, then sample is dried to 50-55h at 115-120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with 200-240m1/min
Rate N is passed through into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere
Degree, and 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water
It washs, until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
In the above method, it is preferred that in S2, the ZnCl of the 3.0mol/L of solid-to-liquid ratio 1:52Activator solution mixing leaching
Stain, dipping temperature are 55 DEG C, dip time 48h.
Preferably, in S1,3% lime, 5% flyash are being additionally added from the sludge that sewage plant is fetched.
Meanwhile the present invention also provides a kind of for handling the technique of landfill leachate, includes the following steps: garbage filter
The liquid continuous input O3 contacted oxidation column of pump, while it being continuously passed through ozone, the water after ozone oxidation is discharged into volume and is
The water butt of 1000L is temporarily stored and is removed residual ozone, is filled through the filter tank the BAC purification of the sludge carbon later
After be discharged.
Preferably, the filter tank BAC is PVC material, diameter 0.14X1.6m；Supporting layer is 3-5cm cobblestone, high 10cm；
Filler is 3-4mm column sludge carbon, porosity 30%, packing layer high lm, volume 15.4L have using the sludge carbon for completing biofilm
Imitate volume 4.6L；Flow of inlet water is controlled by peristaltic pump；Water temperature is controlled at 20-25 DEG C.
Preferably, ozone dosage 292mg03/ L water, when the sludge-based activated carbon residence time is 4.3h, ozone-sludge base
Active carbon advanced treating waste incineration percolate bio-chemical effluent can make to be discharged COD in 2/3 runing time lower than discharge standard
100mg/L, coloration then can stably reaching standards.
The above technical solution of the present invention has the following advantages over the prior art:
(1) provided by the invention a kind of for handling the sludge carbon of landfill leachate, by based on municipal sewage sludge
Raw material is wanted, using ZnCl2Chemical activation method, in suitable activation temperature, activation time, ZnCl2It is prepared when concentration, raw material granularity
And come, it especially joined a small amount of lime, flyash, so that the performance indexes of sludge carbon has clear improvement.
(2) high treating effect: handling landfill leachate with the sludge carbon, can accomplish to realize that level-one A is discharged in a short time,
15000 or more COD is reduced to 2500 or so；
(3) processing cost is low: the sludge carbon prepared in this way, preparation cost is low, and the chemical Treatment that the compares period is more
Short, sludge volume needed for handling the waste water of same volume is smaller, has apparent cost advantage, has the popularity adapted to.
(4) this method handles landfill leachate, reduces the waste of energy consumption, and be conducive to environmental protection, economizes on resources, favorably
In repaying debt to society；Nitrogen-containing heterocycle compound, aromatic compound, nitrile, ether, organic acid and olefines chemical combination can be effectively removed
Object.
Detailed description of the invention
Fig. 1 is the surface texture figure of 2 sludge carbon of raw sewage and embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, and
The embodiment being not all of.The specific embodiments described herein are merely illustrative of the present invention, is not intended to limit the present invention.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
The preparation of 1 sludge carbon of embodiment
S1, the sludge fetched from sewage plant is spontaneously dried at shady and cool ventilation, then the sludge after drying is put into electric heating
It is further dehydrated at 120 DEG C to constant weight in air dry oven；
S2, the sludge after drying and dehydrating then smashed it through into 65 meshes through pulverizer, with the 3mol/L's of solid-to-liquid ratio 1:5
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 55 DEG C, dip time 48h；
S3, then sample is dried to 55h at 120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 240m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere,
And 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water
It washs, until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The preparation of 2 sludge carbon of embodiment
S1,3% lime of sludge weight, 5% flyash is added in the sludge fetched from sewage plant, it is natural at shady and cool ventilation
It is dry, then the sludge after drying is put into electric drying oven with forced convection and is further dehydrated at 120 DEG C to constant weight,；
S2, the sludge after drying and dehydrating then smashed it through into 65 meshes through pulverizer, with the 3mol/L's of solid-to-liquid ratio 1:5
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 55 DEG C, dip time 48h；
S3, then sample is dried to 55h at 120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 240m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere,
And 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water
It washs, until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The preparation of 3 sludge carbon of embodiment
S1, the sludge fetched from sewage plant is spontaneously dried at shady and cool ventilation, then the sludge after drying is put into electric heating
It is further dehydrated at 100 DEG C to constant weight in air dry oven；
S2, the sludge after drying and dehydrating then smashed it through into 100 meshes through pulverizer, with the 2mol/L of solid-to-liquid ratio 1:3
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 75 DEG C, and dip time is for 24 hours；
S3, then sample is dried to 48h at 100 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 160m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 600 DEG C of pyrolysis temperature with the heating rate of 15 DEG C/min under atmosphere,
And 60min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 3mol/L, then is washed repeatedly with 80 DEG C of deionized water
It washs, until water outlet pH is 6；
Drying to constant weight at 100 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The preparation of 4 sludge carbon of embodiment
3% lime of sludge weight, 5% flyash is added in S1, the sludge that will be fetched from sewage plant, at shady and cool ventilation certainly
It is so dry, then the sludge after drying is put into electric drying oven with forced convection and is further dehydrated at 100 DEG C to constant weight；
S2, the sludge after drying and dehydrating then smashed it through into 100 meshes through pulverizer, with the 2mol/L of solid-to-liquid ratio 1:3
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 75 DEG C, and dip time is for 24 hours；
S3, then sample is dried to 48h at 100 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 160m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 600 DEG C of pyrolysis temperature with the heating rate of 15 DEG C/min under atmosphere,
And 60min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 3mol/L, then is washed repeatedly with 80 DEG C of deionized water
It washs, until water outlet pH is 6；
Drying to constant weight at 100 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The preparation of 5 sludge carbon of embodiment
S1,1% lime of sludge weight, 2% flyash is added in the sludge fetched from sewage plant, it is natural at shady and cool ventilation
It is dry, then the sludge after drying is put into electric drying oven with forced convection and is further dehydrated at 120 DEG C to constant weight,；
S2, the sludge after drying and dehydrating then smashed it through into 65 meshes through pulverizer, with the 3mol/L's of solid-to-liquid ratio 1:5
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 55 DEG C, dip time 48h；
S3, then sample is dried to 55h at 120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 240m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere,
And 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water
It washs, until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The preparation of 6 sludge carbon of embodiment
S1,5% lime of sludge weight, 7% flyash is added in the sludge fetched from sewage plant, it is natural at shady and cool ventilation
It is dry, then the sludge after drying is put into electric drying oven with forced convection and is further dehydrated at 120 DEG C to constant weight,；
S2, the sludge after drying and dehydrating then smashed it through into 65 meshes through pulverizer, with the 3mol/L's of solid-to-liquid ratio 1:5
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 55 DEG C, dip time 48h；
S3, then sample is dried to 55h at 120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 240m1/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere,
And 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water
It washs, until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
The processing of 7 landfill leachate of embodiment
S8, landfill leachate is inputted into O3 contacted oxidation column with pump is continuous, while is continuously passed through ozone, by ozone oxygen
Water after change is discharged into the water butt that volume is 1000L and is temporarily stored and removed residual ozone, has been filled through embodiment later
It is discharged after the filter tank the BAC purification of sludge carbon described in one of 1-6.
Wherein the filter tank BAC is PVC material, diameter 0.14X1.6m；Supporting layer is 3-5cm cobblestone, high 10cm；It fills out
Material using complete biofilm sludge carbon, be 3-4mm column sludge carbon, porosity 30%, packing layer high lm, volume 15.4L, effectively
Volume 4.6L；Flow of inlet water is controlled by peristaltic pump；Water temperature is controlled at 20-25 DEG C.
Wherein, ozone dosage 292mg03/ L water, when the sludge-based activated carbon residence time is 4.3h, ozone-sludge base is living
Property charcoal advanced treating waste incineration percolate bio-chemical effluent, can make to be discharged COD in 2/3 runing time lower than discharge standard
100mg/L, coloration then can stably reaching standards.
Because volatile matter can be decomposed to form hole configurations during pyrolysis, volatile matter in sludge carbon
Content is to judge whether sludge is properly prepared into an important indicator of active carbon.It in turn, will be prepared in the embodiment of the present invention
Sludge carbon carry out Industrial Analysis, concrete outcome is shown in Table 1.
The Industrial Analysis of table 1 raw sewage and sludge carbon
| Raw material | Volatile matter | Ash content | Fixed carbon |
| Sludge | 70.34 | 20.11 | 9.55 |
| Embodiment 1 | 32.90 | 35.12 | 31.98 |
| Embodiment 2 | 21.00 | 30.13 | 48.87 |
| Embodiment 3 | 25.90 | 33.45 | 40.65 |
| Embodiment 4 | 32.78 | 35.46 | 31.76 |
| Embodiment 5 | 37.90 | 38.23 | 23.87 |
| Embodiment 6 | 35.27 | 31.09 | 33.64 |
By 1 result of table as it can be seen that the sludge carbon that embodiment 2 is prepared, fix carbon content highest, relative to embodiment 1,
3-6 is significantly improved.
As can be seen from Figure 1: compare raw sewage and 2 sludge carbon of embodiment it is found that sludge carbon surface roughness obviously increases,
Hole, which increases, to be become larger and is randomly distributed, this makes it have very excellent adsorption capacity.Although in addition, being omitted in the present invention
The surface texture of sludge carbon in embodiment 1,3-6, but during practice examining, it observes compared with Example 2, embodiment 1,3-
The surface roughness increase of sludge carbon is not so good as embodiment 2 obviously in 6, and hole increases the degree to become larger and is also not so good as embodiment 2.
In turn, sludge carbon prepared in the embodiment of the present invention is subjected to specific surface area comparison, concrete outcome is shown in Table 2 as original
The specific surface area comparison of sludge, sludge carbon, commodity charcoal.
2 raw sewage of table and sludge carbon carry out specific surface area comparison
| Raw material | Specific surface area | Average pore size |
| Raw sewage | 3.12 | 25.34 |
| Commodity charcoal | 678.1 | 3.45 |
| Embodiment 1 | 230.4 | 8.12 |
| Embodiment 2 | 343.1 | 4.09 |
| Embodiment 3 | 289.2 | 7.78 |
| Embodiment 4 | 256.9 | 10.12 |
| Embodiment 5 | 278.3 | 6.99 |
| Embodiment 6 | 220.3 | 9.34 |
Table 2 the result shows that, the specific surface area of the sludge carbon of different condition preparation is significantly larger than the specific surface area of raw sewage, puts down
Equal aperture is obviously reduced compared with raw sewage, but still is below the specific surface area of commodity charcoal.Especially, sludge prepared by embodiment 2
For charcoal compared to sludge carbon in embodiment 1,3-6, the improvement of specific surface area and average pore size is significantly superior.
Further, sludge carbon prepared in the embodiment of the present invention is used for the processing of landfill leachate, specific method to be shown in
Embodiment 7, concrete outcome is shown in Table 3.
Content of beary metal compares in 2 raw sewage of table and sludge carbon leachate
Table 3 the result shows that, different condition preparation sludge carbon processing landfill leachate after, the weight in sludge carbon leachate
Tenor greatly reduces compared with the content of beary metal in raw sewage.Especially, the sludge carbon that prepared by embodiment 2 is compared to embodiment
1, the content of beary metal reduction in 3-6 in sludge carbon leachate becomes apparent.
Obviously, the experiment condition used in above-described embodiment is only intended to clearly illustrate example, and is not pair
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And it thus extends out
Obvious changes or variations it is still within the protection scope of the invention.
Claims (4)
1. a kind of preparation method of sludge carbon, comprising the following steps:
3% lime, 5% flyash is added in S1, the sludge that will be fetched from sewage plant, spontaneously dries at shady and cool ventilation, then will do
Sludge after dry, which is put into electric drying oven with forced convection, further to be dehydrated at 115-120 DEG C to constant weight；
S2, the sludge after drying and dehydrating then smashed it through into 60-70 mesh through pulverizer, with the 3mol/L's of solid-to-liquid ratio 1:5
ZnCl2Activator solution is mixed with dipping, and dipping temperature is 55 DEG C, dip time 48h；
S3, then sample is dried to 55h at 120 DEG C；
S4, the sludge after drying is placed in the quartz ampoule of OTL1200 type tube type resistance furnace, with the speed of 200-240mL/min
Rate is passed through N into quartz ampoule2, in N2Resistance furnace is warming up to 750 DEG C of pyrolysis temperature with the heating rate of 20 DEG C/min under atmosphere,
And 80min is stopped at this temperature；
After S5, pyrolytic process, sample is in N2Atmosphere under be cooled to room temperature；
S6, thermal decomposition product is washed into dipping 20min with the hydrochloric acid solution of 5mol/L, then is washed repeatedly with 60 DEG C of deionized water,
Until water outlet pH is 7；
Drying to constant weight at 120 DEG C for product after S7, washing, grinding, up to sludge carbon finished product after sieving.
2. it is a kind of for handling the technique of landfill leachate, include the following steps: to pump landfill leachate into continuous input ozone
Catalytic oxidation column, while it being continuously passed through ozone, the water after ozone oxidation is discharged into the water butt that volume is 1000L and carries out temporarily
Residual ozone is stored and removed, is discharged after being filled through the filter tank the BAC purification of sludge carbon described in having the right to require 1 later.
3. the technique according to claim 2 for handling landfill leachate, which is characterized in that the filter tank BAC is PVC
Material, 0.14 × 1.6m of diameter；Supporting layer is 3-5cm cobblestone, high 10cm；Filler is 3- using the sludge carbon for completing biofilm
4mm column sludge carbon, porosity 30%, packing layer high lm, volume 15.4L, effective volume 4.6L；Flow of inlet water passes through peristaltic pump
To control；Water temperature is controlled at 20-25 DEG C.
4. the technique according to claim 3 for handling landfill leachate, which is characterized in that ozone dosage 292mgO3/ L water, when the sludge-based activated carbon residence time is 4.3h, ozone-sludge-based activated carbon advanced treating waste incineration percolate is raw
Water is dissolved, can make to be discharged COD in 2/3 runing time lower than discharge standard 100mg/L, coloration then can stably reaching standard.
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| CN110092553A (en) * | 2019-04-10 | 2019-08-06 | 浙江清风源环保科技有限公司 | A method of based on pyrolyzing sludge curing heavy metal |
| CN110327881B (en) * | 2019-07-09 | 2022-09-30 | 南京永能新材料有限公司 | Garbage deodorant and preparation method thereof |
| CN110282624A (en) * | 2019-07-10 | 2019-09-27 | 广州市净水有限公司 | A method of active carbon is prepared using sludge |
| CN113117654A (en) * | 2021-05-21 | 2021-07-16 | 江西中江环保集团股份有限公司 | Preparation method of adsorbent based on municipal sludge |
| CN115739066A (en) * | 2022-10-31 | 2023-03-07 | 西安建筑科技大学 | Biochar catalyst, preparation method thereof, and landfill leachate treatment system and method |
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