CN102161557A - Method for treating excess sludge - Google Patents
Method for treating excess sludge Download PDFInfo
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- CN102161557A CN102161557A CN 201110057411 CN201110057411A CN102161557A CN 102161557 A CN102161557 A CN 102161557A CN 201110057411 CN201110057411 CN 201110057411 CN 201110057411 A CN201110057411 A CN 201110057411A CN 102161557 A CN102161557 A CN 102161557A
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- sludge
- excess sludge
- mummification
- mud
- flue gas
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- 239000010802 sludge Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005245 sintering Methods 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 8
- 230000018044 dehydration Effects 0.000 claims abstract description 6
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000011362 coarse particle Substances 0.000 claims abstract description 3
- 239000008187 granular material Substances 0.000 claims description 21
- 238000005272 metallurgy Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 5
- 239000010801 sewage sludge Substances 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 abstract description 2
- 238000005469 granulation Methods 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 description 18
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 235000015097 nutrients Nutrition 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001717 pathogenic effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 231100000734 genotoxic potential Toxicity 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000019600 saltiness Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for treating excess sludge. The excess sludge is dried by utilizing sintering flue gas which is discharged in a metallurgical sintering process and has higher temperature. The method specifically comprises the following steps of: feeding excess sludge to be treated which has the water content of between 80 and 90 percent into a plate and frame filter press, dehydrating under the pressure of between 25 and 45MPa to obtain a filter-pressed dehydrated sludge cake with the water content of between 40 and 55 percent, feeding the sludge cake into a sludge granulation device to crush into coarse particles with the particle size of about between 3 and 5mm, introducing the particles into a thermal energy drying room, introducing flue gas which is discharged in the metallurgical sintering process and has the temperature of between 100 and 180 DEG C into the thermal energy drying room, and drying the sludge particles, wherein the calorific value of the dried sludge is 2,000 to 4,000 kilocalories and the water content is 5 to 10 percent. The method has the advantages that: the waste heat in the sintering flue gas in iron and steel metallurgical industry is effectively utilized, the dehydration of the excess sludge is reduced, the excess sludge with a higher calorific value is taken as fuel to be added into a sintering working procedure, and the final treatment of the excess sludge is realized.
Description
Technical field
The present invention relates to that excess sludge is handled and the disposal field, particularly in conjunction with the treatment process of a kind of excess sludge of metallurgy sintered technology.
Background technology
Excess sludge is the solid precipitation material that produces in the sewage treatment process, contains large quantity of moisture, inorganic ash content and organic volatile.Along with Chinese society economy and development of urbanization, the generation of municipal effluent and quantity thereof are in continuous growth.At present seat surplus the municipal sewage plant about 500 of running has been built up in the whole nation, and a year processing power is 113.6 hundred million m
3According to relevant prediction, China's municipal effluent amount also had than leap ahead in next two decades, 2010 the end of the year quantity of wastewater effluent will reach 440 * 108 m
3/ d; The year two thousand twenty quantity of wastewater effluent reaches 536 * 108 m
3/ d.The raising of sewage treating efficiency must cause the increase of excess sludge quantity.According to the national environmental protection department statistics, to the end of the year 2010, China's town sewage processing rate will reach 60%, and annual when the time comes national excess sludge generation will reach 3,000 ten thousand t(water ratio 80%).Excess sludge in the sewage disposal is handled and disposal technology also is in the starting stage in China, and what excess sludge stabilizing treatment facility was arranged in the existing sewage treatment facility in the whole nation is less than 1/4, and what treatment process and support equipment were comparatively perfect is less than 1/10.Investment and working cost that excess sludge is handled are huge, can account for 25% ~ 65% of investment of entire sewage factory and working cost, the heavy burden that has become the municipal sewage plant and faced.
Excess sludge is the fittings after the sewage disposal, is a kind of extremely complicated heterogeneous body of being made up of organic relic, bacterium thalline, inorganic particle, colloid etc.The excess sludge saltiness is higher, can obviously improve soil conductivity, destroy the plant nutrient balance, suppress plant to nutrient absorbing, even root system of plant is caused direct injury, and interionic antagonistic action can be quickened the leaching loss of available nutrient.Pathogenic agent in the sewage (pathogenic micro-organism and parasite) can enter in the mud through processing, detects the pathogenic agent that obtains in the fresh sludge and reaches thousand kinds.In sewage treatment process, 70%～90% heavy metal element is transferred in the excess sludge by absorption or precipitation.Some heavy metal elements are mainly derived from the waste water of industrial discharge such as cadmium, chromium; Some heavy metals derive from the tubing system such as the heavy metals such as copper, zinc of family life.Heavy metal is the important factor that the extensive soil of restriction excess sludge utilizes, because after excess sludge is applied to soil, heavy metal will accumulate in surface layer.The general solubleness of heavy metal is very little in addition, and character is stable, difficult to be removed, so its genotoxic potential is easy to accumulate in crop and the animal and the mankind.After on the soil is porous in rainfall amount larger area soil, using the excess sludge that is rich in N, P etc. in a large number, when the organism decomposition rate greater than plant during to the absorption rate of N, P, nutrient such as N, P just might lose with current and enter the eutrophication that surface water body causes water body, enters the underground phreatic pollution that causes.
Along with social economy and fast development of urbanization, China's municipal sewage treatment ability constantly strengthens, and the surplus sludge volume of generation sharply increases.If excess sludge can not get appropriate treatment and disposal, not only will take a large amount of soils, and will cause secondary pollution environment, become big public hazards that influence urban environmental hygiene.How science, appropriate processing excess sludge have become the key issue that urban development must solve.
Summary of the invention
In order to address the above problem, the objective of the invention is to propose to utilize the sinter fume mummification excess sludge that discharges in the metallurgy sintered technology, to reach the purpose of excess sludge dehydration minimizing with comparatively high temps.For the excess sludge of calorific value higher (greater than 2000 kilocalories), can replace a part of fuel to add in the sintering circuit after the mummification, thereby realize the treatment process of a kind of excess sludge of recycling.
Technical scheme of the present invention is: a kind of treatment process of excess sludge, utilize the sinter fume mummification excess sludge that discharges in the metallurgy sintered technology with comparatively high temps, and specifically may further comprise the steps:
1. the excess sludge that with pending water ratio is 80%-90% is sent into filter press water machine, under the compaction pressure of 25MPa-45MPa, dewater, the filter-press dehydration sludge cake that obtains, moisture percentage in sewage sludge is reduced to 40%-55%, and the waste water of generation imports wastewater treatment equipment and handles;
2. the mud cake that above-mentioned steps is made is sent into the mud granulizing device, is broken into the coarse particles that particle diameter is about 3-5mm at normal temperatures, and is standby;
3. mud granule is imported between the heat energy mummification, with the temperature of discharging in the metallurgy sintered technology is that 100-180 ℃ high temperature sintering flue gas is introduced between the heat energy mummification, after mud granule carries out mummification between the heat energy mummification, discharging from the other end, sludge calorific value is that 2000-4000 kilocalorie, water content are water ratio 5%-10% after the mummification, and the flue gas of generation imports the sinter fume treatment unit and handles.
Further, this method also comprises the mud after the mummification mixed with the ratio of mass percent 3% and is applied in the coal in the metallurgy sintered operation as fuel.
The invention has the beneficial effects as follows: the excess sludge method of disposal that the present invention proposes, not only realize the disposal of excess sludge, and effectively utilized the waste heat in the iron and steel metallurgical industry sinter fume, reached the purpose of excess sludge dehydration minimizing.Simultaneously can the excess sludge that calorific value is higher act as a fuel and add sintering circuit to, realized the ultimate disposal of excess sludge.
Description of drawings
Fig. 1 is a principle of the invention synoptic diagram.
Embodiment
As shown in Figure 1, the excess sludge disposal plant that technical scheme the comprised combination that the present invention proposes comprises: between sheet frame water extracter, mud granulizing device, heat energy mummification, dewatered sludge warehouse, agglomerating plant, wastewater treatment equipment, sinter fume treatment unit.Technical process comprises:
The excess sludge of the about 80%-90% of water ratio is stored in the mud storage pool, enter by the mud transfer roller and to carry out filter-press dehydration in the pressure filter and handle, free water content in the mud is pushed out, make the half-driedization sludge cake of water ratio 40%-55%, the waste water of generation imports wastewater treatment equipment and handles.Half-driedization sludge cake enters the mud granulizing device by the mud cake transfer roller, makes the mud granule of particle diameter 3-5mm, and mud granule has bigger specific surface area with respect to sludge cake, for next step heat energy mummification creates favorable conditions.Mud granule enters and carries out mummification between the heat energy mummification, adopts airtight insulation construction between the heat energy mummification, and its inside is provided with paver, tripper, gas stirring device and temperature and humidity control device.Paver, tripper are used for tiling and stir mud granule; The gas stirring device evenly is full of between whole mummification high-temperature flue gas; Temperature is greater than 100 ℃ between temperature and humidity control device control mummification, and humidity is less than 10%.Draw from the end introducing of high temperature sintering flue gas between mummification of metallurgy sintered operation and discharge from the other end, moisture in the high-temperature flue gas evaporation mud granule and then with its mummification, moisture percentage in sewage sludge is less than 10% after the mummification, and the flue gas of discharge imports the sinter fume treatment unit and handles.Calorific value can replace a part of fuel applications in sintering circuit greater than the excess sludge of 2000 kilocalories after the mummification.
Embodiment 1:
Take from the excess sludge water ratio 85.2% of certain sewage work, be conveyed in the plate-and-frame filter press, Hydraulic Station provides the compaction pressure of 25MPa for plate-and-frame filter press.Mud granule is trapped within and forms half-driedization sludge cake in the filter chamber, and filtrate is collected by collection device and is recycled to Sewage treatment systems.Resulting half-driedization sludge cake water ratio 43.7%.Half-driedization sludge cake is gone into the mud granulizing device by the mud cake conveyor delivery, the mud granule median size 3.8mm that makes.
During mud granule is tiled between the heat energy mummification, feed the about 150 ℃ metallurgy sintering smoke of temperature.Constantly stir mud granule in the drying process and quicken mummification with machinery, simultaneously by interior humidity between the mummification of wet bulb thermometer monitoring heat energy, thus but indirect monitoring sludge drying degree.After the mummification, sludge calorific value is that 2000 kilocalories, water ratio are 8.7%.
Embodiment 2:
Take from the excess sludge water ratio 82.6% of certain sewage work, be conveyed in the plate-and-frame filter press, Hydraulic Station provides the compaction pressure of 35MPa for plate-and-frame filter press.Mud granule is trapped within and forms half-driedization sludge cake in the filter chamber, and filtrate is collected by collection device and is recycled to Sewage treatment systems.Resulting half-driedization sludge cake water ratio 41.5%.Half-driedization sludge cake is gone into the mud granulizing device by the mud cake conveyor delivery, the mud granule median size 4.3mm that makes.
During mud granule is tiled between the heat energy mummification, about 100 ℃ of the metallurgy sintering smoke temperature of feeding.Constantly stir mud granule in the drying process and quicken mummification with machinery, simultaneously by interior humidity between the mummification of wet bulb thermometer monitoring heat energy, thus but indirect monitoring sludge drying degree.After the mummification, moisture percentage in sewage sludge is 6.5%.Sludge calorific value after the mummification is 3241 kilocalories, and the mass ratio by 3% mixes in the coal and is applied in the sintering circuit as a part of alternative fuel.
Embodiment 3:
Take from the excess sludge water ratio 82.6% of certain sewage work, be conveyed in the plate-and-frame filter press, Hydraulic Station provides the compaction pressure of 45MPa for plate-and-frame filter press.Mud granule is trapped within and forms half-driedization sludge cake in the filter chamber, and filtrate is collected by collection device and is recycled to Sewage treatment systems.Resulting half-driedization sludge cake water ratio 41.5%.Half-driedization sludge cake is gone into the mud granulizing device by the mud cake conveyor delivery, the mud granule median size 4.3mm that makes.
During mud granule is tiled between the heat energy mummification, about 180 ℃ of the metallurgy sintering smoke temperature of feeding.Constantly stir mud granule in the drying process and quicken mummification with machinery, simultaneously by interior humidity between the mummification of wet bulb thermometer monitoring heat energy, thus but indirect monitoring sludge drying degree.After the mummification, moisture percentage in sewage sludge is 10%.Sludge calorific value after the mummification is 4000 kilocalories, and the mass ratio by 3% mixes in the coal and is applied in the sintering circuit as a part of alternative fuel.
Claims (2)
1. the treatment process of an excess sludge is utilized the sinter fume mummification excess sludge with comparatively high temps that discharges in the metallurgy sintered technology, it is characterized in that, specifically may further comprise the steps:
1. the excess sludge that with pending water ratio is 80%-90% is sent into filter press water machine, under the compaction pressure of 25MPa-45MPa, dewater, the filter-press dehydration sludge cake that obtains, moisture percentage in sewage sludge is reduced to 40%-55%, and the waste water of generation imports wastewater treatment equipment and handles;
2. the mud cake that above-mentioned steps is made is sent into the mud granulizing device, is broken into the coarse particles that particle diameter is about 3-5mm at normal temperatures, and is standby;
3. mud granule is imported between the heat energy mummification, with the temperature of discharging in the metallurgy sintered technology is that 100-180 ℃ high temperature sintering flue gas is introduced between the heat energy mummification, after mud granule carries out mummification between the heat energy mummification, discharging from the other end, sludge calorific value is that 2000-4000 kilocalorie, water content are water ratio 5%-10% after the mummification, and the flue gas of generation imports the sinter fume treatment unit and handles.
2. the treatment process of excess sludge according to claim 1 is characterized in that, this method comprises also that the mud after the mummification mixes with the ratio of mass percent 3% and is applied in the coal in the metallurgy sintered operation as fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110057411 CN102161557B (en) | 2011-03-10 | 2011-03-10 | Method for treating excess sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110057411 CN102161557B (en) | 2011-03-10 | 2011-03-10 | Method for treating excess sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102161557A true CN102161557A (en) | 2011-08-24 |
| CN102161557B CN102161557B (en) | 2013-01-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110057411 Expired - Fee Related CN102161557B (en) | 2011-03-10 | 2011-03-10 | Method for treating excess sludge |
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| Country | Link |
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| CN (1) | CN102161557B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374417A (en) * | 2012-04-27 | 2013-10-30 | 王庆 | Fluidized bed gasification method of sludge and pulverized coal |
| CN104418478A (en) * | 2013-09-10 | 2015-03-18 | 中国科学院大连化学物理研究所 | Method for processing sludge employing biocide-coupled quick lime |
| CN105271624A (en) * | 2014-05-29 | 2016-01-27 | 宝山钢铁股份有限公司 | Method for synergistically treating heavy metal sludge |
| CN105800892A (en) * | 2016-05-13 | 2016-07-27 | 安徽金农惠民生物技术有限公司 | Blue-green algae and excess sludge resourceful treatment method |
| CN109928595A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | Sludge deep drying method and system based on low-temperature heat source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654378A (en) * | 2005-01-21 | 2005-08-17 | 浙江大学 | Method for drying sludge by residual heat from boiler fume |
| CN101792247A (en) * | 2010-03-19 | 2010-08-04 | 杭州新源环境工程有限公司 | Sludge treatment method capable of combining powerful dehydration with low-temperature mummification |
-
2011
- 2011-03-10 CN CN 201110057411 patent/CN102161557B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654378A (en) * | 2005-01-21 | 2005-08-17 | 浙江大学 | Method for drying sludge by residual heat from boiler fume |
| CN101792247A (en) * | 2010-03-19 | 2010-08-04 | 杭州新源环境工程有限公司 | Sludge treatment method capable of combining powerful dehydration with low-temperature mummification |
Non-Patent Citations (1)
| Title |
|---|
| 《中国给水排水》 20080229 翁焕新等 利用烟气余热干化城市污泥工艺的应用 第58-61页 1-2 第24卷, 第4期 2 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374417A (en) * | 2012-04-27 | 2013-10-30 | 王庆 | Fluidized bed gasification method of sludge and pulverized coal |
| CN103374417B (en) * | 2012-04-27 | 2017-05-03 | 任相坤 | Fluidized bed gasification method of sludge and pulverized coal |
| CN104418478A (en) * | 2013-09-10 | 2015-03-18 | 中国科学院大连化学物理研究所 | Method for processing sludge employing biocide-coupled quick lime |
| CN105271624A (en) * | 2014-05-29 | 2016-01-27 | 宝山钢铁股份有限公司 | Method for synergistically treating heavy metal sludge |
| CN105271624B (en) * | 2014-05-29 | 2018-03-09 | 宝山钢铁股份有限公司 | A kind of method of cooperative disposal heavy metal sewage sludge |
| CN105800892A (en) * | 2016-05-13 | 2016-07-27 | 安徽金农惠民生物技术有限公司 | Blue-green algae and excess sludge resourceful treatment method |
| CN109928595A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | Sludge deep drying method and system based on low-temperature heat source |
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| CN102161557B (en) | 2013-01-30 |
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