CN214360807U - System for treating residual sludge pyrolysis press filtrate in urban sewage plant - Google Patents
System for treating residual sludge pyrolysis press filtrate in urban sewage plant Download PDFInfo
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- CN214360807U CN214360807U CN202023134696.7U CN202023134696U CN214360807U CN 214360807 U CN214360807 U CN 214360807U CN 202023134696 U CN202023134696 U CN 202023134696U CN 214360807 U CN214360807 U CN 214360807U
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- sedimentation tank
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- 239000010802 sludge Substances 0.000 title claims abstract description 47
- 239000000706 filtrate Substances 0.000 title claims abstract description 43
- 239000010865 sewage Substances 0.000 title claims abstract description 18
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 17
- 238000004062 sedimentation Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 238000007790 scraping Methods 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 210000005056 cell body Anatomy 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 20
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 10
- 102000004169 proteins and genes Human genes 0.000 description 10
- 108090000623 proteins and genes Proteins 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000013049 sediment Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000003814 drug Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000006228 supernatant Substances 0.000 description 6
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 230000003301 hydrolyzing effect Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 239000000413 hydrolysate Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000004572 hydraulic lime Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- -1 sodium carbonate Chemical compound 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
The utility model provides a processing system of surplus sludge pyrolysis press filtrate of town sewage plant, its separation that can realize calcium carbonate precipitation is and practice thrift the cost. The utility model provides a system for processing of surplus sludge pyrolysis press filtrate in town sewage plant which characterized in that: the treatment system comprises a filtrate dosing mixing tank, a horizontal flow sedimentation tank, a pH adjusting tank and a filtering storage tank, wherein a liquid inlet of the filtrate dosing mixing tank is connected with a filtrate outlet of the plate-and-frame filter press, a liquid outlet of the filtrate dosing mixing tank is connected with a liquid inlet of the horizontal flow sedimentation tank, a liquid outlet of the horizontal flow sedimentation tank is connected with a liquid inlet of the pH adjusting tank, and a sludge discharge port of the horizontal flow sedimentation tank is connected with a feed inlet of the filtering storage tank; the discharge port of the filtering storage tank is connected with the feed inlet of the batching kettle, the discharge port of the batching kettle is connected with the feed inlet of the pyrolysis reaction kettle, the discharge port of the pyrolysis reaction kettle is connected with the feed inlet of the flash evaporation device, and the discharge port of the flash evaporation device is connected with the plate-and-frame filter press.
Description
Technical Field
The utility model relates to a sludge treatment technical field, concretely relates to system for processing of surplus sludge pyrolysis press filtrate in town sewage plant.
Background
With the wide adoption of the biotechnology of the sewage plant and the continuous upgrading of the sewage plant, the yield of the sludge is obviously increased in recent years, the treatment and disposal of the sewage sludge have various treatment processes at present, but how to change waste into valuable is to make the sludge into a resource product, and the development of a treatment device becomes the bottleneck of the resource application of the sludge. At present, the alkaline thermal hydrolysis process becomes one of the hot mainstream processes, and the resource products comprise: the liquid fertilizer and the soil remediation nutrient soil with rich nutrition have the difficulties that after the hydrolysis, nutrition transfer and conversion of sludge, the efficient separation of materials is realized through a plate frame, and the stable operation is realized due to good liquid phase components and high quality. At present, when the filter pressing is difficult by a common process, the addition of an alkaline conditioner is adjusted, the quality of the hydrolysate is directly influenced, the next procedure is often influenced, the production is influenced, and the hydrolysate cannot be recycled.
The utility model patent application with the prior publication number of CN1868929A and the name of 'production process and equipment for preparing hydrolyzed protein by hydrolyzing excess activated sludge with quicklime' discloses a production process and equipment for preparing hydrolyzed protein by hydrolyzing excess activated sludge with quicklime, which are suitable for industrial production. The process comprises mixing and stirring the residual activated sludge, water and quicklime according to the proportion of 1: 0.06 for 20-30 minutes; pumping the mixed solution into a hydrolysis reaction kettle for hydrolysis, wherein the hydrolysis time is 1-3h under the conditions that the working pressure is 0.4-0.7MPa and the hydrolysis temperature is 135-150 ℃; hydrolyzing, filtering, adjusting pH of the filtrate to 7.0-8.5 with hydrochloric acid, concentrating to obtain protein concentrate, and optionally drying to obtain dry protein product. However, the protein concentrated solution or the dry product obtained by the application of the utility model contains high-concentration calcium ions, the problem is not solved, the industrialization is difficult, and the large-scale resource utilization is influenced, so soluble carbonate, such as sodium carbonate, is required to be added into the filtrate, the calcium ions can be precipitated, and the concentration of the calcium ions in the protein concentrated solution is reduced. It is necessary to design a set of treatment system which is matched with the system, separates the calcium carbonate precipitate and saves the cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a processing system of surplus sludge pyrolysis press filtrate of town sewage plant, its separation that can realize calcium carbonate precipitation is and practice thrift the cost.
The technical scheme is that, a system for treating residual sludge pyrolysis press filtrate in town sewage plants, which is characterized in that: the treatment system comprises a filtrate dosing and mixing tank, a horizontal flow sedimentation tank, a pH adjusting tank and a filtering storage tank, wherein a liquid inlet of the filtrate dosing and mixing tank is connected with a filtrate outlet of the plate-and-frame filter press, a liquid outlet of the filtrate dosing and mixing tank is connected with a liquid inlet of the horizontal flow sedimentation tank, a liquid outlet of the horizontal flow sedimentation tank is connected with a liquid inlet of the pH adjusting tank, and a sludge discharge port of the horizontal flow sedimentation tank is connected with a feed inlet of the filtering storage tank;
the filtrate dosing mixing tank is connected with a sodium carbonate storage tank, and the pH adjusting tank is connected with a concentrated sulfuric acid storage tank;
the discharge port of the filtering storage tank is connected with the feed inlet of the batching kettle, the discharge port of the batching kettle is connected with the feed inlet of the pyrolysis reaction kettle, the discharge port of the pyrolysis reaction kettle is connected with the feed inlet of the flash evaporation device, and the discharge port of the flash evaporation device is connected with the plate-and-frame filter press.
Furthermore, a sludge scraping device is installed at the bottom of the horizontal sedimentation tank, and a vertical inclined plate is connected to a frame of the sludge scraping device installation scraper.
Furthermore, the vertical inclined plates are arranged in two and are connected in an X shape, and the wide surfaces of the vertical inclined plates are perpendicular to the advancing direction of the sludge scraping device.
Further, the frame includes slip table, support and stopper, the both sides that the slip table is located the width direction of advection sedimentation tank are connected with support, stopper from interior to exterior setting respectively, be formed with between support and the stopper with the cell body lateral wall direction complex recess of advection sedimentation tank, the leg joint the scraper blade, the advection sedimentation tank top is provided with the lead screw that sets up along its length direction, the motor is connected to the one end of lead screw, the lead screw support is connected to the other end, the lead screw support the motor respectively with the cell body length direction's of advection sedimentation tank both sides wall fixed connection, be equipped with on the lead screw with lead screw complex nut seat.
A method for treating pyrolysis press filtrate of excess sludge in a town sewage plant is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s01, mixing the press filtrate and sodium carbonate according to the weight ratio of 500: 2 is added into a filtrate dosing mixing pool, the stirring speed is 30r/min, and the retention time is 20 min;
s02, conveying the filter pressing liquid after the medicine is added in the step S01 to a horizontal flow sedimentation tank, wherein the moving speed of a vertical inclined plate and a scraper plate is 0.1-0.5 m/min, and the retention time is 3 h;
s03, conveying the supernatant of the horizontal flow sedimentation tank to a pH adjusting tank, adding concentrated sulfuric acid into the pH adjusting tank through a filtering storage tank by a pump, and adjusting the pH of the supernatant to 7.0-9.5;
the sediment in the sediment hopper of the horizontal sedimentation tank is conveyed to a filtering storage tank by a pump;
s04, concentrating the supernatant neutralized in the step S03 to obtain protein concentrated solution,
the sediment stored in the step S03 is conveyed to a batching kettle through a pump to be mixed with the sludge.
Further, the preparation method of the press filtrate comprises the following steps,
s11, mixing the sludge with water and lime with water content of 80% obtained by a sewage treatment plant according to the ratio of 10: 6: adding the mixture into a batching kettle according to the mass ratio of 0.65, preheating and uniformly stirring;
s12, adding the sludge mixture stirred in the step S11 into a reaction kettle, reacting for 2 hours at 120 ℃,
s13, cooling the sludge mixture after the reaction in the step S12 to 60-80 ℃ through a flash evaporation device 3;
s14, the sludge mixture cooled in the step S13 enters a plate and frame system for filter pressing, and filter pressing liquid is obtained.
The utility model discloses a processing system separates the calcium carbonate through the advection sedimentation tank and deposits, ensures the industrialization of albumen concentrate preparation, realizes extensive resource utilization, simultaneously, deposits calcium carbonate and collects, stores in and filters the storage tank to be used as the filter aid of sheet frame filter-pressing, cyclic utilization further reduces thermokalite medicament quantity, practices thrift the cost.
Drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is a schematic structural view of the horizontal flow sedimentation tank of the utility model.
Detailed Description
As shown in fig. 1 and 2, the system for treating the residual sludge pyrolytic press filtrate in the urban sewage plant comprises a filtrate dosing and mixing tank 5, a horizontal flow sedimentation tank 7, a pH adjusting tank 8 and a filtering storage tank 10, wherein a liquid inlet of the filtrate dosing and mixing tank 5 is connected with a filtrate outlet of a plate-and-frame filter press 4, a liquid outlet of the filtrate dosing and mixing tank is connected with a liquid inlet of the horizontal flow sedimentation tank 7, a liquid outlet of the horizontal flow sedimentation tank 7 is connected with a liquid inlet of the pH adjusting tank, and a sludge discharge port of the horizontal flow sedimentation tank 7 is connected with a feed inlet of the filtering storage tank 10;
the filtrate dosing and mixing tank 5 is connected with a sodium carbonate storage tank 6, the pH adjusting tank 8 is connected with a concentrated sulfuric acid storage tank 9, and stirrers are respectively arranged in the filtrate dosing and mixing tank 5 and the pH adjusting tank 8;
the discharge gate of filtering storage 10 jar is connected with batching cauldron 1's feed inlet, and batching cauldron 1's discharge gate is connected with pyrolysis reaction cauldron 2's feed inlet, and pyrolysis reaction cauldron 2's discharge gate is connected with flash distillation unit 3's feed inlet, and flash distillation unit 3 discharge gate is connected with plate and frame filter press 4.
The bottom of the horizontal sedimentation tank 7 is provided with a sludge scraping device, and a vertical inclined plate is connected on a frame of a scraper blade of the sludge scraping device. Specifically, the vertical inclined plates are arranged in two and are connected in an X shape, and the wide surfaces of the vertical inclined plates are perpendicular to the advancing direction of the sludge scraping device. The frame includes slip table 74, support and stopper, the both sides that slip table 74 is located the width direction of advection sedimentation tank are connected with the support that sets up from inside to outside respectively, the stopper, be formed with between support and the stopper with the cell body 71 lateral wall direction complex recess of advection sedimentation tank, the leg joint scraper blade, advection sedimentation tank top is provided with the lead screw that sets up along its length direction, motor 73 is connected to the one end of lead screw, lead screw support 72 is connected to the other end, lead screw support 72, motor 73 respectively with the cell body 71 length direction's of advection sedimentation tank both sides wall fixed connection, be equipped with on the lead screw with lead screw complex nut seat. The horizontal flow sedimentation tank is in the prior art, a sludge accumulation hopper 75 is arranged on the lower portion of one side of the tank body in the length direction, 76 is a supporting leg, and the scraper plate moves along the length direction of the tank body under the driving of the matching of a motor, a screw rod, a nut seat, a sliding table and a bracket, so that the sediment at the bottom of the tank body is scraped to the sludge accumulation hopper 75 and is led out.
A method for treating residual sludge pyrolytic press filtrate in a town sewage plant, which comprises the following steps,
s01, adding 500t of press filtrate and 2t of sodium carbonate into a filtrate dosing mixing tank, stirring at the speed of 30r/min, and staying for 20 min;
s02, conveying the filter pressing liquid after the medicine is added in the step S01 to a horizontal flow sedimentation tank, wherein the moving speed of a vertical inclined plate and a scraper plate is 0.1-0.5 m/min, and the retention time is 3 h;
s03, conveying the supernatant of the horizontal flow sedimentation tank to a pH adjusting tank, adding concentrated sulfuric acid into the pH adjusting tank through a concentrated sulfuric acid tank by a pump, and adjusting the pH of the supernatant to 7.0-9.5;
accumulating and dehydrating 1.3 tons of hardness substances in a sediment hopper of the horizontal sedimentation tank every day, and pumping the sediment into a filtering storage tank;
s04, concentrating the supernatant neutralized in the step S03 to obtain protein concentrated solution,
the sediment stored in the filtering material storage tank in the step S03 is conveyed to a batching kettle by a pump to be mixed with the sludge.
The preparation method of the pressure filtrate comprises the following steps,
s11, adding 10t of sludge with water content of 80 percent, 6t of water and 650kg of lime which are obtained by a sewage treatment plant into a batching kettle, preheating and uniformly stirring;
s12, adding the sludge mixture stirred in the step S11 into a reaction kettle, reacting for 2 hours at 120 ℃,
s13, cooling the sludge mixture after the reaction in the step S12 to 60-80 ℃ through a flash evaporation device;
s14, the sludge mixture cooled in the step S13 enters a plate and frame system for filter pressing, and the filter pressing liquid is obtained by pressing under the pressure of 1.0-1.1 MPa.
The device system enables the recycling rate of the hardness substances to reach 65%, further reduces the dosage of the thermokalite medicament, saves the cost, reduces the water content of the soil improvement mud cake from 45% to 40%, obtains the particle size of the hardness substances of 500 meshes (average value), and reduces the filtering time of the filter pressing liquid from 2.5h (adopting 300 meshes of calcium carbonate, average value) to 2.0 h; meanwhile, the hardness of the protein press filtrate is further reduced to about 1.5g/L from 4.0g/L, and the quality of the protein concentrated solution is effectively improved. The particle size of the originally adopted calcium carbonate filter aid is 300 meshes, and the cost is increased by more than 20 percent because the 500-mesh calcium carbonate is compared with 300 meshes. In this application, calcium ion in the filtrating is used for plate and frame filter press's filter aid after precipitating with the form of calcium carbonate, simultaneously, adds the setting of stirring speed, liquid dwell time when adding the medicine through filtrating in the medicine mixing tank 5 sodium carbonate to and the setting of vertical swash plate and scraper blade removal speed, liquid dwell time in the advection sedimentation tank, the particle diameter of the calcium carbonate precipitate of control generation is at 500 meshes, can also effectively reduce cost.
Claims (4)
1. The utility model provides a system for processing of surplus sludge pyrolysis press filtrate in town sewage plant which characterized in that: the treatment system comprises a filtrate dosing and mixing tank, a horizontal flow sedimentation tank, a pH adjusting tank and a filtering storage tank, wherein a liquid inlet of the filtrate dosing and mixing tank is connected with a filtrate outlet of the plate-and-frame filter press, a liquid outlet of the filtrate dosing and mixing tank is connected with a liquid inlet of the horizontal flow sedimentation tank, a liquid outlet of the horizontal flow sedimentation tank is connected with a liquid inlet of the pH adjusting tank, and a sludge discharge port of the horizontal flow sedimentation tank is connected with a feed inlet of the filtering storage tank;
the filtrate dosing mixing tank is connected with a sodium carbonate storage tank, and the pH adjusting tank is connected with a concentrated sulfuric acid storage tank;
the discharge port of the filtering storage tank is connected with the feed inlet of the batching kettle, the discharge port of the batching kettle is connected with the feed inlet of the pyrolysis reaction kettle, the discharge port of the pyrolysis reaction kettle is connected with the feed inlet of the flash evaporation device, and the discharge port of the flash evaporation device is connected with the plate-and-frame filter press.
2. The system for treating the pyrolytic press filtrate of the excess sludge of the urban sewage plant according to claim 1, wherein: the bottom of the horizontal sedimentation tank is provided with a sludge scraping device, and a vertical inclined plate is connected to a frame of the sludge scraping device mounting scraper.
3. The system for treating the pyrolytic pressure filtrate of the excess sludge of the urban sewage plant according to claim 2, wherein: the two vertical inclined plates are connected in an X shape, and the wide surfaces of the vertical inclined plates are perpendicular to the advancing direction of the sludge scraping device.
4. The system for treating the pyrolytic pressure filtrate of the excess sludge of the urban sewage plant according to claim 2, wherein: the frame includes slip table, support and stopper, the both sides that the slip table is located the width direction of advection sedimentation tank are connected with support, stopper from interior to exterior setting respectively, be formed with between support and the stopper with the cell body lateral wall direction complex recess of advection sedimentation tank, the leg joint the scraper blade, the advection sedimentation tank top is provided with the lead screw that sets up along its length direction, the lead screw support is connected to the motor, the other end of lead screw, the lead screw support the motor respectively with the cell body length direction's of advection sedimentation tank both sides wall fixed connection, be equipped with on the lead screw with lead screw complex nut seat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023134696.7U CN214360807U (en) | 2020-12-23 | 2020-12-23 | System for treating residual sludge pyrolysis press filtrate in urban sewage plant |
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| CN202023134696.7U CN214360807U (en) | 2020-12-23 | 2020-12-23 | System for treating residual sludge pyrolysis press filtrate in urban sewage plant |
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| CN214360807U true CN214360807U (en) | 2021-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112661306A (en) * | 2020-12-23 | 2021-04-16 | 山西晋联环境科技有限公司 | System and method for treating pyrolysis press filtrate of excess sludge in urban sewage plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112661306A (en) * | 2020-12-23 | 2021-04-16 | 山西晋联环境科技有限公司 | System and method for treating pyrolysis press filtrate of excess sludge in urban sewage plant |
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