CN104003384A - Method for preparing activated carbon by using mixture of activated sludge and reed straws - Google Patents
Method for preparing activated carbon by using mixture of activated sludge and reed straws Download PDFInfo
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- CN104003384A CN104003384A CN201310062184.XA CN201310062184A CN104003384A CN 104003384 A CN104003384 A CN 104003384A CN 201310062184 A CN201310062184 A CN 201310062184A CN 104003384 A CN104003384 A CN 104003384A
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Abstract
The invention discloses a method for preparing activated carbon by using a mixture of activated sludge and reed straws. The method comprises the following steps of (1) drying dewatered sludge taken from a sewage plant in an oven; (2) cutting the reed straws into lengths and drying in an oven; (3) breaking dried sludge and screening to obtain sludge particle samples, mixing the sludge particle samples into dried and broken reed straw samples; (4) activating the mixed sample of the sludge and straws with a certain concentration of potassium hydroxide; centrifuging the mixture of the sludge and straws after activation is finished and drying a solid sample obtained by centrifugation in a vacuum oven; (5) pyrolyzing a dried mixture of the sludge and straws with nitrogen as a protective gas and cooling to obtain an activated carbon crude product; and (6) immersing the prepared crude product in hydrochloric acid, washing with distilled water and drying. The method can carry out production of the activated carbon by using wastes in sewage treatment.
Description
Technical field
The present invention relates to a kind of method of preparing gac, refer more particularly to the method for utilizing active sludge mixing reed straw to prepare gac.
Background technology
Active sludge is the biological process by product producing in process of disposing of sewage.Along with the fast development of China's economy and the continuous acceleration of urbanization, sewage load increases rapidly, and active sludge output also sharply increased, by the end of the end of the year in 2010, whole nation town sewage treatment capacity reaches 343 billion cubic meters, and dewatered sludge generation approaches 2,200 ten thousand tons (water ratio 80%).And active sludge is except containing bacterium, pathogenic micro-organism, parasitic ovum and suspended matter, the mud that industrial sewage treatment plant produces also may contain heavy metal and toxic and harmful substance.If active sludge can not appropriately be processed in time, can bring secondary pollution to water body, atmosphere and soil.At present, active sludge is carried out to recycling, more and more caused everybody extensive concern.
Reed is a kind of tall and big herbaceous plant of aquatic or humidogene for many years, often grows in many water areas such as pond, riverbank, He Xi limit, forms reed field, widely distributed in China.In reed straw, xylon and hemicellulose level are higher, preparing the formation that can increase gac space in gac process, therefore, reed straw and active sludge are mixed with to gac and can not only improve the performance of gac, and realized the recycling to active sludge and reed straw, promoting recycling economy and field of Environment Protection important in inhibiting.
Summary of the invention
Object of the present invention aims to provide a kind of method of utilizing active sludge mixing reed straw to prepare gac, and a kind of method of utilizing waste to make gac is provided.
According to the present invention, a kind of method of utilizing active sludge mixing reed straw to prepare gac is provided, comprise the following steps: step 1, the dewatered sludge of fetching from Sewage Plant is put into baking oven dry; Step 2, cuts into certain length by reed straw, puts into baking oven dry; Step 3, by the sludge crushing of drying, sieves and obtains mud granule sample, and mixes according to a certain percentage the reed straw sample after mummification is pulverized; Step 4, activates the sludge straw biased sample having adulterated in step 2 with certain density potassium hydroxide, after having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dry in vacuum drying oven; Step 5, dried sludge straw mixture is taking nitrogen as the pyrolysis of protection gas, then cooling, make gac crude samples; Step 6, will use distilled water wash, final drying after the thick product salt acid soak making again.
According to one embodiment of the invention, the reed straw length after the cutting of step 2 is 0.5～2.0 millimeter.
According to one embodiment of the invention, the mud of step 3 and the mass ratio of reed straw are 1: 1～4: 1.
According to one embodiment of the invention, the activation reactivation process of step 4 is carried out in isothermal vibration device, and the time is 10～48 hours.
According to one embodiment of the invention, the pyrolysis temperature of step 5 is 600～800 DEG C, and pyrolysis time is 60～120 minutes.
According to one embodiment of the invention, the drying temperature of step 1, step 2, step 4 and step 6 is 105 DEG C.
According to one embodiment of the invention, hydrochloric acid adopts 1+9 hydrochloric acid.
Adopt technical scheme of the present invention, can utilize the waste in sewage disposal to carry out the production of gac, realized the recycling of harmful toxic matter.
Brief description of the drawings
In the present invention, identical Reference numeral represents identical feature all the time, wherein:
Fig. 1 is that the present invention utilizes active sludge mixing reed straw to prepare the method flow diagram of gac.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with drawings and Examples.
embodiment 1
(1) dewatered sludge of fetching from Sewage Plant is put into baking oven, dry at 105 DEG C;
(2) by reed straw cutting, stalk section length is 2.0 millimeters, puts into baking oven, dry at 105 DEG C;
(3) by the sludge crushing of drying, sieve and obtain mud granule sample, and be by sludge straw mass ratio the reed straw sample mixing at 1: 1 after mummification is pulverized.
(4) the certain density potassium hydroxide of sludge straw biased sample having adulterated in step (2) is activated, in reactivation process, in isothermal vibration device, carry out, soak time is 10 hours.After having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dried at 105 DEG C in vacuum drying oven.
(5) by dried sludge straw mixture taking nitrogen as the pyrolysis 60 minutes at 600 DEG C of protection gas, then cooling, make gac crude samples.
(6) will after the thick product 1+9 salt acid soak making, use again distilled water wash, then dry at 105 DEG C, obtain activated carbon product.
The specific surface area of the gac making is 430m2/g, and iodine number is 440mg/g.
embodiment 2
(1) dewatered sludge of fetching from Sewage Plant is put into baking oven, dry at 105 DEG C;
(2) by reed straw cutting, stalk section length is 1.0 millimeters, puts into baking oven, dry at 105 DEG C;
(3) by the sludge crushing of drying, sieve and obtain mud granule sample, and be by sludge straw mass ratio the reed straw sample mixing at 2: 1 after mummification is pulverized.
(4) the certain density potassium hydroxide of sludge straw biased sample having adulterated in step (2) is activated, in reactivation process, in isothermal vibration device, carry out, soak time is 24 hours.After having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dried at 105 DEG C in vacuum drying oven.
(5) by dried sludge straw mixture taking nitrogen as the pyrolysis 90 minutes at 600 DEG C of protection gas, then cooling, make gac crude samples.
(6) will after the thick product 1+9 salt acid soak making, use again distilled water wash, then dry at 105 DEG C, obtain activated carbon product.
The specific surface area of the gac making is 460m2/g, and iodine number is 470mg/g.
embodiment 3
(1) dewatered sludge of fetching from Sewage Plant is put into baking oven, dry at 105 DEG C;
(2) by reed straw cutting, stalk section length is 0.5 millimeter, puts into baking oven, dry at 105 DEG C;
(3) by the sludge crushing of drying, sieve and obtain mud granule sample, and be by sludge straw mass ratio the reed straw sample mixing at 4: 1 after mummification is pulverized.
(4) the certain density potassium hydroxide of sludge straw biased sample having adulterated in step (2) is activated, in reactivation process, in isothermal vibration device, carry out, soak time is 48 hours.After having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dried at 105 DEG C in vacuum drying oven.
(5) by dried sludge straw mixture taking nitrogen as the pyrolysis 120 minutes at 800 DEG C of protection gas, then cooling, make gac crude samples.
(6) will after the thick product 1+9 salt acid soak making, use again distilled water wash, then dry at 105 DEG C, obtain activated carbon product.
The specific surface area of the gac making is 560m2/g, and iodine number is 580mg/g.
embodiment 4
(1) dewatered sludge of fetching from Sewage Plant is put into baking oven, dry at 105 DEG C;
(2) by reed straw cutting, stalk section length is 0.5 millimeter, puts into baking oven, dry at 105 DEG C;
(3) by the sludge crushing of drying, sieve and obtain mud granule sample, and be by sludge straw mass ratio the reed straw sample mixing at 4: 1 after mummification is pulverized.
(4) the certain density potassium hydroxide of sludge straw biased sample having adulterated in step (2) is activated, in reactivation process, in isothermal vibration device, carry out, soak time is 24 hours.After having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dried at 105 DEG C in vacuum drying oven.
(5) by dried sludge straw mixture taking nitrogen as the pyrolysis 120 minutes at 800 DEG C of protection gas, then cooling, make gac crude samples.
(6) will after the thick product 1+9 salt acid soak making, use again distilled water wash, then dry at 105 DEG C, obtain activated carbon product.
The specific surface area of the gac making is 530m2/g, and iodine number is 540mg/g.
Those of ordinary skill in the art will be appreciated that, above specification sheets is only one or more embodiments in the numerous embodiment of the present invention, and not uses limitation of the invention.Any equalization variation, modification for the above embodiment and be equal to the technical schemes such as alternative, as long as connotation scope according to the invention, all will drop in the scope that claims of the present invention protect.
Claims (7)
1. utilize active sludge mixing reed straw to prepare a method for gac, it is characterized in that, comprise the following steps:
Step 1, puts into baking oven by the dewatered sludge of fetching from Sewage Plant dry;
Step 2, cuts into certain length by reed straw, puts into baking oven dry;
Step 3, by the sludge crushing of drying, sieves and obtains mud granule sample, and mixes according to a certain percentage the reed straw sample after mummification is pulverized;
Step 4, activates the sludge straw biased sample having adulterated in step 2 with certain density potassium hydroxide, after having activated, by centrifugal sludge straw mixture, centrifugal rear gained solid sample is dry in vacuum drying oven;
Step 5, dried sludge straw mixture is taking nitrogen as the pyrolysis of protection gas, then cooling, make gac crude samples;
Step 6, will use distilled water wash, final drying after the thick product salt acid soak making again.
2. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, the reed straw length after the cutting described in step 2 is 0.5～2.0 millimeter.
3. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, the mud described in step 3 and the mass ratio of reed straw are 1: 1～4: 1.
4. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, the activation reactivation process described in step 4 is carried out in isothermal vibration device, and the time is 10～48 hours.
5. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, the pyrolysis temperature described in step 5 is 600～800 DEG C, and pyrolysis time is 60～120 minutes.
6. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, the drying temperature described in step 1, step 2, step 4 and step 6 is 105 DEG C.
7. the method for utilizing active sludge mixing reed straw to prepare gac according to claim 1, is characterized in that, described hydrochloric acid adopts 1+9 hydrochloric acid.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854800A (en) * | 2016-04-28 | 2016-08-17 | 辽宁石油化工大学 | Method for preparing modified charcoal by utilizing aquatic plant wastes and hydrochloric acid |
| CN106395788A (en) * | 2016-08-26 | 2017-02-15 | 华南理工大学 | Sludge/cationic clay multidimensional carbon nanomaterial, and preparation and applications thereof |
| CN106512947A (en) * | 2016-12-21 | 2017-03-22 | 福建师范大学 | Preparation method of sludge-based charcoal doped with bamboo and wood powder |
| CN106698880A (en) * | 2016-12-21 | 2017-05-24 | 福建师范大学 | Preparation method of sludge based biochar doped with hair |
| CN106732363A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal of the feces of livestock and poultry that adulterates |
| CN106732359A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal of doped plastics powder |
| CN107175078A (en) * | 2017-07-21 | 2017-09-19 | 西昌学院 | A kind of sludge buckwheat base magnetic active carbon and preparation method thereof |
| CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
| CN108975330A (en) * | 2018-09-30 | 2018-12-11 | 江苏斯沃得环保科技有限公司 | A method of active carbon is prepared using stalk and sludge |
| CN111087054A (en) * | 2019-12-13 | 2020-05-01 | 黑龙江大学 | Simple preparation method for synthesizing electro-adsorption desalination electrode by carbonizing reed straw |
| CN112845494A (en) * | 2020-12-04 | 2021-05-28 | 南京斯博伏特新材料有限公司 | Method for preparing sewage treatment material by utilizing agricultural waste |
| CN115520864A (en) * | 2022-09-28 | 2022-12-27 | 山西大学 | Preparation method of sulfur-nitrogen in-situ doped porous carbon material |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854800A (en) * | 2016-04-28 | 2016-08-17 | 辽宁石油化工大学 | Method for preparing modified charcoal by utilizing aquatic plant wastes and hydrochloric acid |
| CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
| CN106395788A (en) * | 2016-08-26 | 2017-02-15 | 华南理工大学 | Sludge/cationic clay multidimensional carbon nanomaterial, and preparation and applications thereof |
| CN106395788B (en) * | 2016-08-26 | 2019-08-20 | 华南理工大学 | A kind of sludge/cationic clay multidimensional carbon nanomaterial and its preparation and application |
| CN106698880A (en) * | 2016-12-21 | 2017-05-24 | 福建师范大学 | Preparation method of sludge based biochar doped with hair |
| CN106732359A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal of doped plastics powder |
| CN106732363A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal of the feces of livestock and poultry that adulterates |
| CN106512947A (en) * | 2016-12-21 | 2017-03-22 | 福建师范大学 | Preparation method of sludge-based charcoal doped with bamboo and wood powder |
| CN107175078A (en) * | 2017-07-21 | 2017-09-19 | 西昌学院 | A kind of sludge buckwheat base magnetic active carbon and preparation method thereof |
| CN108975330A (en) * | 2018-09-30 | 2018-12-11 | 江苏斯沃得环保科技有限公司 | A method of active carbon is prepared using stalk and sludge |
| CN111087054A (en) * | 2019-12-13 | 2020-05-01 | 黑龙江大学 | Simple preparation method for synthesizing electro-adsorption desalination electrode by carbonizing reed straw |
| CN112845494A (en) * | 2020-12-04 | 2021-05-28 | 南京斯博伏特新材料有限公司 | Method for preparing sewage treatment material by utilizing agricultural waste |
| CN115520864A (en) * | 2022-09-28 | 2022-12-27 | 山西大学 | Preparation method of sulfur-nitrogen in-situ doped porous carbon material |
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Application publication date: 20140827 |