CN112939387A - Calcium nitrate coupled sludge thermokalite hydrolysis treatment method and system - Google Patents
Calcium nitrate coupled sludge thermokalite hydrolysis treatment method and system Download PDFInfo
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- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
- C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2303/00—Specific treatment goals
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Abstract
The invention provides a calcium nitrate coupled sludge thermokalite hydrolysis treatment method and a calcium nitrate coupled sludge thermokalite hydrolysis treatment system, and solves the technical problems that the sludge water content is too high, the dehydration is difficult and the resource utilization maximization cannot be effectively realized in the conventional sludge treatment process. A method for treating sludge through calcium nitrate coupled thermokalite hydrolysis is characterized by comprising the following steps: the method uses calcium oxide and calcium nitrate as conditioning agents. The utility model provides a system that calcium nitrate coupling mud thermal-alkaline hydrolysis handled, including sludge storage storehouse, the medicament compounding jar, MVR evaporation concentration device, steam boiler and the allotment cauldron that loops through the tube coupling, the hydrolysis reaction cauldron, two-stage flash distillation plant, solid-liquid separation equipment, sludge storage storehouse, medicament compounding cauldron are respectively through tube coupling allotment cauldron, solid-liquid separation equipment's filtrating export passes through tube coupling MVR evaporation concentration device, filter cake exit linkage steam boiler, steam boiler's steam pipeline connects the saturated steam jacket of hydrolysis reaction cauldron.
Description
Technical Field
The invention belongs to the technical field of sludge treatment and disposal, and particularly relates to a calcium nitrate coupled sludge thermokalite hydrolysis treatment method and system.
Background
The sludge is used as a main byproduct of sewage treatment and has two aspects of pollution and resource utilization. On one hand, the sludge is used as rich waste biomass, contains N, P, K and other major elements and trace elements required by plant growth, has great potential agricultural value, but the wall breaking is the bottleneck of sludge treatment; on the other hand, the sludge contains a large amount of pathogens, parasites, heavy metal substances and organic matters which are difficult to biodegrade, and if the sludge is not subjected to stabilization and harmless treatment in time, the environment is seriously polluted, wherein dewatering is a key step of sludge treatment.
The conventional dewatering conditioning agent is mainly prepared from aluminum salt, ferric salt, Polyacrylamide (PAM) and other chemical agents, the adding proportion of the conditioning agent accounts for 45-50% of the dry weight of sludge, and after mechanical dewatering treatment, the water content of a mud cake is still over 70%, so that the treatment and the disposal of subsequent sludge are not facilitated, and the full resource utilization of the sludge cannot be effectively maximized.
Disclosure of Invention
The invention provides a calcium nitrate coupled sludge thermokalite hydrolysis treatment method and a calcium nitrate coupled sludge thermokalite hydrolysis treatment system, and solves the technical problems that the sludge water content is too high, the dehydration is difficult and the resource utilization maximization cannot be effectively realized in the conventional sludge treatment process.
A method for treating sludge through calcium nitrate coupled thermokalite hydrolysis is characterized by comprising the following steps: the method uses calcium oxide and calcium nitrate as conditioning agents.
Furthermore, the adding proportion of the calcium oxide is 20-30% of the dry weight of the sludge, and the adding proportion of the calcium nitrate is 10-25% of the dry weight of the sludge.
Furthermore, the calcium oxide is added in a proportion of 28% of the dry weight of the sludge, and the calcium nitrate is added in a proportion of 10% of the dry weight of the sludge.
Further, the method comprises the steps of,
(1) blending sludge, namely blending the water content of the sludge to 85-90% in a blending kettle, adjusting the temperature in the blending kettle to 70-90 ℃, and adding a conditioning agent into a medicament mixing tank;
(2) pumping the prepared sludge in the preparation kettle into a hydrolysis reaction kettle, controlling the hydrolysis temperature at 120-150 ℃, and keeping the temperature for 30-90 min;
(3) and (3) carrying out flash evaporation and solid-liquid separation on the sludge, carrying out flash evaporation and cooling on the sludge subjected to thermal hydrolysis, and then feeding the sludge into a solid-liquid separation device to separate to obtain filtrate and filter cakes, wherein the filtrate is a protein stock solution.
(4) And storing the obtained protein stock solution through a stock solution tank, concentrating through an MVR concentration device, and blending to obtain the liquid fertilizer.
Further, in the step (1), the sludge includes mixed sludge, municipal sewage sludge and/or industrial wastewater sludge, and the industrial wastewater sludge includes but is not limited to paper sludge, domestic sludge and food sludge.
Further, in the step (1), the water content of the sludge is adjusted to 90%, and the temperature in the blending kettle is 80 ℃.
Further, in the step (2), the hydrolysis temperature is maintained at 120 ℃, and the thermal hydrolysis reaction time is maintained at 90 min.
Further, in the step (1) and the step (2), the medicament mixing tank, the blending kettle and the hydrolysis reaction kettle are all provided with a stirrer, and the stirring speed is maintained at 75 rpm; in the step (1), the stirring time in the medicament mixing tank is 30-40 min.
The utility model provides a system that calcium nitrate coupling mud thermal-alkaline hydrolysis was handled, includes sludge storage storehouse, medicament compounding jar, MVR evaporation concentration device, steam boiler and loops through pipe connection's allotment cauldron, hydrolysis reaction cauldron, two-stage flash distillation unit, solid-liquid separation equipment, sludge storage storehouse, medicament compounding cauldron are respectively through pipe connection allotment cauldron, solid-liquid separation equipment's filtrating export passes through pipe connection MVR evaporation concentration device, filter cake exit linkage steam boiler, steam boiler's steam pipeline connects the saturated steam jacket of hydrolysis reaction cauldron.
Further, the solid-liquid separation device is a plate-frame filter pressing device, a centrifugal dehydration device or a belt filter pressing device.
Further, the MVR evaporation concentration device is connected with the filtrate collection device through a pipeline.
Furthermore, a vapor outlet of the two-stage flash evaporation device and a vapor outlet of the MVR concentration device are connected with a condenser through pipelines, and the condenser is connected with the blending kettle.
The method and the system have the beneficial effects that:
(1) the calcium nitrate has oxidability at high temperature, and the coupled thermal hydrolysis technology can effectively realize the destruction of sludge flocs, the dissolution of sludge Extracellular Polymeric Substance (EPS) and the crushing of microbial cells;
(2) calcium nitrate is easy to dissolve in water, a large amount of divalent free calcium is easy to generate, and the electric neutralization reaction can be carried out through a double electric layer of the compressed sludge colloid; after the sludge is subjected to hot alkali hydrolysis treatment, flocs are cracked, and proteins and carbohydrates are hydrolyzed, so that more binding sites are provided for calcium ions, bridging connection among the flocs is strengthened, the viscosity of the sludge is reduced, and the dehydration performance of the sludge is improved;
(3) the hydrolysis of the calcium nitrate is weakly acidic, which is beneficial to neutralizing the alkalinity in the protein concentrated solution, meanwhile, the calcium nitrate is used as a soil fertilizer, the residual calcium nitrate is concentrated into the protein concentrated solution through the filtrate, and the total nutrients in the protein concentrated solution are improved;
(4) compared with the method of simply increasing the adding amount of calcium oxide, the calcium nitrate-coupled calcium oxide has better filter pressing effect and better quality of the obtained protein concentrate; the addition of the calcium nitrate reduces the investment of calcium oxide, avoids the scaling of a reaction kettle and an MVR concentration pipeline, and reduces the cost for actual equipment maintenance;
(5) the filter cake is used as fuel of a steam boiler, redundant moisture in the sludge is recycled for sludge blending through a two-stage flash evaporation device, and the sludge treatment of the system realizes the maximization of full resource utilization.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
Detailed Description
Example 1
As shown in figure 1, a system for thermal-alkaline hydrolysis treatment of calcium nitrate coupled sludge comprises a sludge storage bin 1, a medicament mixing tank 2, an MVR evaporation concentration device 3, a filtrate collection device 9, a steam boiler 4, a blending kettle 5, a hydrolysis reaction kettle 6, a two-stage flash evaporation device 7 and a solid-liquid separation device 8 which are sequentially connected through pipelines, wherein the sludge storage bin 1 and the medicament mixing tank 2 are respectively connected with the blending kettle 5 through pipelines, a filtrate outlet of the solid-liquid separation device 8 is connected with the MVR evaporation concentration device 3 through a pipeline, a filter cake outlet is connected with the steam boiler 4, the MVR evaporation concentration device 3 is connected with the filtrate collection device 9 through a pipeline, a steam pipeline of the steam boiler 4 is connected with a saturated steam jacket of the hydrolysis reaction kettle 6 and used for heating the hydrolysis reaction kettle to realize steam recycling, the two-stage flash evaporation tank 7 and the MVR evaporation concentration device 3 are respectively connected with a condenser through pipelines and, the condenser is connected with a blending kettle 5 for blending sludge to realize reclaimed water recycling, and the solid-liquid separation device 8 is a plate-frame filter pressing device. The pipelines are additionally provided with corresponding conveying units, such as water pumps, wherein sludge storage bins can adopt sludge conveying screws between the preparation kettles 5.
Example 2
A calcium nitrate coupling sludge thermokalite hydrolysis treatment method comprises the following steps;
(1) sludge blending: the water content of sludge (collected from sewage treatment plants in south of Shanxi city) is regulated to 90%, the sludge is conveyed to a sludge regulation kettle by a sludge conveying screw, and the regulation agents are calcium oxide and anhydrous calcium nitrate, wherein the addition proportion of the calcium oxide accounts for 28% of the dry weight of the sludge, and the addition proportion of the anhydrous calcium nitrate accounts for 10% of the dry weight of the sludge. The dissolution and mixing of the conditioning agent are carried out in an agent mixing tank, the stirring speed of the agent mixing tank is maintained at 75rpm, the stirring time is 40min, the liquid outlet of the agent mixing tank is connected with the liquid inlet of a blending kettle, the temperature of the blending kettle is controlled at 80 ℃ by adopting a steam jacket, a double-blade stirrer is adopted, and the stirring speed is maintained at 75 rpm.
(2) Sludge hydrolysis: pumping the prepared sludge in the preparation kettle into a hydrolysis reaction kettle, wherein the hydrolysis reaction kettle is provided with a double-paddle stirrer, the stirring speed is maintained at 75rpm, the sludge is heated by a saturated steam jacket, the temperature is controlled at 120 ℃, and the heat preservation time is 90min, so that the thermal hydrolysis process of the sludge is completed.
(3) Sludge flash evaporation and solid-liquid separation: the sludge is subjected to two-stage flash evaporation, the sludge temperature is reduced to 96 ℃ through a first-stage flash evaporation device, the sludge temperature is reduced to 70 ℃ through a second-stage flash evaporation device, the flash-evaporated sludge-water mixed liquid is stored in a filtering storage tank to be subjected to plate frame filter pressing, wherein the plate frame feeding pressure adopts an interval 'incremental' pressing dehydration process, the low pressure is 0.2MPa, the pressure is increased in an incremental range of 0.1MPa, the highest pressure is 0.7MPa, the feeding time is 60min, the pressing pressure is 1MPa, the pressing time is 60min, and the protein raw liquid and the filter cake can be obtained after solid-liquid separation.
(4) The protein stock solution passes through an MVR evaporation concentration device, and the concentration temperature is controlled at 95 ℃.
The sludge Specific Resistance (SRF) of the mud-water mixture after the hot alkali hydrolysis is 1.03 multiplied by 1012 m/kg, the capillary water absorption time (CST) is 30.5s, the water content of a filter cake is 38.7 percent, and the crude protein content in the protein concentrated solution is 35 percent.
Example 3
The method of the embodiment 3 is different from the method of the embodiment 2 in that in the sludge blending stage, the conditioning agents are calcium oxide and anhydrous calcium nitrate, wherein the addition proportion of the calcium oxide accounts for 20% of the dry weight of the sludge, and the addition proportion of the anhydrous calcium nitrate accounts for 10% of the dry weight of the sludge.
The SRF of the mud-water mixture after the hot alkali hydrolysis is 3.23 multiplied by 1012 m/kg, CST 63.7s, water content of filter cake 47%, crude protein content in protein concentrate 26%.
Example 4
The method of example 4 is different from the method of example 2 in that in the sludge blending stage, the conditioning agents are calcium oxide and anhydrous calcium nitrate, wherein the addition proportion of the calcium oxide accounts for 30% of the dry weight of the sludge, and the addition proportion of the calcium nitrate accounts for 25% of the dry weight of the sludge.
Hot alkaline hydrolysisThe SRF of the slurry mixture was 1.0X 1012m/kg. CST is 29.1s, the water content of the filter cake is 36%, and the crude protein content in the protein concentrated solution is 33%.
Comparative example 1
The method of comparative example 1 is different from that of example 2 in that in the sludge blending stage, the conditioning agent is calcium oxide, wherein the addition proportion of the calcium oxide accounts for 28 percent of the dry weight of the sludge.
The SRF of the mud-water mixture after the hot alkali hydrolysis is 4.51 multiplied by 1012 m/kg, CST 196.3s, water content of filter cake 64.8%, crude protein content in protein concentrate 28%.
Comparative example 2
Comparative example 2 differs from the method of example 2 in that in the sludge conditioning stage, the conditioning agent is calcium oxide, which is added in a proportion of 50% by dry weight of the sludge.
The SRF of the mud-water mixture after the hot alkali hydrolysis is 2.56 multiplied by 1012 m/kg, CST 49.2s, water content of filter cake 40.5%, crude protein content in protein concentrate 30%.
The conditioning agent is based on calcium oxide, and is helpful for promoting deep dehydration treatment of sludge by increasing the addition amount of calcium oxide or adding calcium nitrate additionally; in addition, compared with the addition of calcium oxide, the addition of calcium nitrate has the advantages that the SRF, CST and the water content of filter cakes are smaller, the filter pressing effect is better, meanwhile, the crude protein content in the protein concentrated solution is higher, and the quality of the protein concentrated solution is better; in addition, the addition of calcium nitrate reduces the investment of calcium oxide, avoids the scaling of a reaction kettle and an MVR concentration pipeline, and reduces the cost for actual equipment maintenance.
It is seen from the comparison of the data in the embodiment 2 and the embodiment 4 that the moisture content of the SRF, the CST and the filter cake is not greatly reduced by adding too much calcium oxide and calcium nitrate, and the increase of the dosage of the drug increases the cost of the drug and the operation and maintenance cost of the equipment, and the strong alkalinity aggravates the maillard reaction during the thermal hydrolysis process, so that the content of the dissolved protein is reduced, and the subsequent product is not suitable for recycling.
To sum up, the protein filtrate can be used as liquid fertilizer after passing through the MVR evaporation concentration device, the filter cake is used as steam boiler fuel to recycle steam, and the sludge treatment system realizes the maximization of the full resource utilization of the sludge.
In the above examples and comparative examples, the protein filtrate is concentrated by the MVR evaporation concentration device and is not blended (i.e. the nutrients such as protein in the concentrated protein filtrate are adjusted to meet the requirements of relevant standards).
The present invention is further described in detail with reference to the embodiments, which should not be construed as limiting the scope of the present invention, but rather as providing the following claims with various modifications and alterations all without departing from the basic concept of the present invention.
Claims (10)
1. A method for treating sludge through calcium nitrate coupled thermokalite hydrolysis is characterized by comprising the following steps: the method uses calcium oxide and calcium nitrate as conditioning agents.
2. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 1, characterized in that: the adding proportion of the calcium oxide is 20-30% of the dry weight of the sludge, and the adding proportion of the calcium nitrate is 10-25% of the dry weight of the sludge.
3. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 2, characterized in that: the calcium oxide accounts for 28% of the dry weight of the sludge, and the calcium nitrate accounts for 10% of the dry weight of the sludge.
4. The method for thermal alkaline hydrolysis treatment of calcium nitrate coupled sludge according to any one of claims 1 to 3, wherein the method comprises the following steps: the method comprises the following steps of,
(1) blending sludge, namely blending the water content of the sludge to 85-90% in a blending kettle, adjusting the temperature in the blending kettle to 70-90 ℃, and adding a conditioning agent into a medicament mixing tank;
(2) pumping the prepared sludge in the preparation kettle into a hydrolysis reaction kettle, controlling the hydrolysis temperature at 120-150 ℃, and keeping the temperature for 30-90 min;
(3) carrying out flash evaporation and solid-liquid separation on the sludge, carrying out flash evaporation and cooling on the sludge subjected to thermal hydrolysis, and then feeding the sludge into a solid-liquid separation device to obtain a filtrate and a filter cake through separation, wherein the filtrate is a protein stock solution;
(4) and storing the obtained protein stock solution through a stock solution tank, concentrating through an MVR concentration device, and blending to obtain the liquid fertilizer.
5. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 4, wherein the method comprises the following steps: in the step (1), the sludge comprises mixed sludge, municipal sewage sludge and/or industrial wastewater sludge, and the industrial wastewater sludge comprises but is not limited to paper sludge, domestic sludge and food sludge.
6. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 4, wherein the method comprises the following steps: in the step (1), the water content of the sludge is adjusted to 90%, and the temperature in the blending kettle is 80 ℃.
7. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 4, wherein the method comprises the following steps: in the step (2), the hydrolysis temperature is maintained at 120 ℃, and the thermal hydrolysis reaction time is maintained at 90 min.
8. The method for the thermokalite hydrolysis treatment of calcium nitrate-coupled sludge according to claim 4, wherein the method comprises the following steps: in the step (1) and the step (2), the medicament mixing tank, the blending kettle and the hydrolysis reaction kettle are all provided with stirrers, and the stirring rotating speed is maintained at 75 rpm; in the step (1), the stirring time in the medicament mixing tank is 30-40 min.
9. The utility model provides a system that calcium nitrate coupling mud thermokalite hydrolysis handled which characterized in that: the system comprises a sludge storage bin, a medicament mixing tank, an MVR evaporation concentration device, a steam boiler, a blending kettle, a hydrolysis reaction kettle, a two-stage flash evaporation device and a solid-liquid separation device which are sequentially connected through a pipeline, wherein a filtrate outlet of the solid-liquid separation device is connected with the MVR evaporation concentration device through a pipeline, a filter cake outlet of the solid-liquid separation device is connected with the steam boiler, and the MVR evaporation concentration device is connected with a filtrate collection device through a pipeline;
the steam pipeline of the steam boiler is connected with a saturated steam jacket of the hydrolysis reaction kettle, the steam outlets of the two-stage flash evaporation device and the MVR concentration device are connected with a condenser through pipelines, and the condenser is connected with the blending kettle.
10. The method for thermal alkaline hydrolysis treatment of calcium nitrate coupled sludge according to claim 9, wherein: the solid-liquid separation device is a plate-frame filter pressing device, a centrifugal dehydration device or a belt filter pressing device.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461284A (en) * | 2021-07-30 | 2021-10-01 | 北京石油化工学院 | Municipal sludge treatment method for nitrate-enhanced pyrohydrolysis |
| CN114634379A (en) * | 2022-03-07 | 2022-06-17 | 无锡国联环保科技股份有限公司 | Improvement method for alkaline pyrohydrolysis of sludge and polypeptide amino acid fertilizer |
| CN114733527A (en) * | 2022-04-08 | 2022-07-12 | 同济大学 | Preparation method of Ca-Ni ash-based catalyst and hydrogen-rich synthesis gas |
| CN115710075A (en) * | 2023-01-04 | 2023-02-24 | 北京神州朗泰低碳科技有限公司 | Municipal sludge treatment method and treatment device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933086A (en) * | 1989-08-03 | 1990-06-12 | Texaco Inc. | Partial oxidation of sewage sludge |
| CN104628233A (en) * | 2014-12-30 | 2015-05-20 | 浙江海亮固废处理科技有限公司 | Deep dehydration device and deep dehydration method for organic materials |
| CN108191192A (en) * | 2018-01-30 | 2018-06-22 | 山西晋联环境科技有限公司 | A kind of sludge alkalinity pyrohydrolysis processing method and system |
| CN108793656A (en) * | 2018-05-25 | 2018-11-13 | 上海交通大学 | Promote the method that anaerobic sludge digestion generates methane in sewage gas purity |
| WO2019122296A1 (en) * | 2017-12-22 | 2019-06-27 | Yara International Asa | Method for controlling the dosage of a biogas production optimizer in an anaerobic digester sludge and anaerobic biogas digester system for performing such a method |
-
2021
- 2021-03-05 CN CN202110244705.8A patent/CN112939387A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933086A (en) * | 1989-08-03 | 1990-06-12 | Texaco Inc. | Partial oxidation of sewage sludge |
| CN104628233A (en) * | 2014-12-30 | 2015-05-20 | 浙江海亮固废处理科技有限公司 | Deep dehydration device and deep dehydration method for organic materials |
| WO2019122296A1 (en) * | 2017-12-22 | 2019-06-27 | Yara International Asa | Method for controlling the dosage of a biogas production optimizer in an anaerobic digester sludge and anaerobic biogas digester system for performing such a method |
| CN108191192A (en) * | 2018-01-30 | 2018-06-22 | 山西晋联环境科技有限公司 | A kind of sludge alkalinity pyrohydrolysis processing method and system |
| CN108793656A (en) * | 2018-05-25 | 2018-11-13 | 上海交通大学 | Promote the method that anaerobic sludge digestion generates methane in sewage gas purity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461284A (en) * | 2021-07-30 | 2021-10-01 | 北京石油化工学院 | Municipal sludge treatment method for nitrate-enhanced pyrohydrolysis |
| CN114634379A (en) * | 2022-03-07 | 2022-06-17 | 无锡国联环保科技股份有限公司 | Improvement method for alkaline pyrohydrolysis of sludge and polypeptide amino acid fertilizer |
| CN114733527A (en) * | 2022-04-08 | 2022-07-12 | 同济大学 | Preparation method of Ca-Ni ash-based catalyst and hydrogen-rich synthesis gas |
| CN115710075A (en) * | 2023-01-04 | 2023-02-24 | 北京神州朗泰低碳科技有限公司 | Municipal sludge treatment method and treatment device thereof |
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Application publication date: 20210611 |