CN203487018U - Deep treatment device for sludge - Google Patents
Deep treatment device for sludge Download PDFInfo
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- CN203487018U CN203487018U CN201320461651.1U CN201320461651U CN203487018U CN 203487018 U CN203487018 U CN 203487018U CN 201320461651 U CN201320461651 U CN 201320461651U CN 203487018 U CN203487018 U CN 203487018U
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The utility model relates to a deep treatment device for sludge. The device comprises a sludge conditioning and dosing system, a sludge membrane-breaking reactor, a sludge dewatering machine, a sludge dryer, a sludge thermal-decomposition furnace, a biomass fuel heat supply system, a flue gas cleaning system and an automatic control system, wherein the sludge conditioning and dosing system is connected with a sludge conditioning reactor, an outlet of the sludge conditioning reactor is connected with an inlet of the sludge dewatering machine, a sludge outlet of the sludge dewatering machine is connected with the sludge dryer, a sludge outlet of the sludge dryer is connected with the sludge thermal-decomposition furnace, and an exhaust gas outlet of the sludge dryer is connected with the flue gas cleaning system; the biomass fuel heat supply system is provided with two hot air outlets which are respectively connected with air inlets of the sludge dryer and the sludge thermal-decomposition furnace; the sludge thermal-decomposition furnace is connected with a biomass fuel furnace, and the automatic control system is connected with the sludge dryer, the sludge thermal-decomposition furnace and air volume regulation valves arranged on the hot air outlets of the biomass fuel heat supply system. According to the device, the sludge reduction, hazard-free treatment and reclamation can be realized.
Description
Technical field
The utility model relates to the device that a kind of sludge deep is processed, this device utilizes the combination process lignin-sludge of rupture of membranes, dehydration, dry, pyrolysis, and generate the method for charcoal, be specially adapted to the excess sludge that sanitary sewage disposal factory produces, and the industrial sludge that produces of the industry such as printing and dyeing, weaving, papermaking.
Background technology
Mud is the by product in sanitary sewage and During Industrial Wastewater Treatment Process.Along with the fast development of China's economy, the production-scale expansion of industrial enterprise, sludge yield is increasing year by year.Due to the hysteresis of sludge disposal technology, it is full of suffering from hopeless predicament that a lot of sewage works and enterprise face " mud ".In recent years, due to mud, arbitrarily toppled over and cause serious Environment Pollution Event to appear in the newspapers repeatly, caused government and the public's concern.
The output of China's mud is large at present, water ratio is high, sludge disposal technology is uneven, mainly with simple landfill or heap, save as master, yet a large amount of mud does not reach the landfill yard admission standard of water ratio below 60%, stabilization, harmless treatment disposal rate are lower, both be unfavorable for the utilization of resources, easily caused again secondary pollution problem.On the other hand, to flourishing cities such as Guangzhou, Shenzhen, Beijing, land resources is extremely valuable, and Sludge landfill has been subjected to restriction.Although sludge incineration can realize the most thoroughly, farthest subtract appearance, but sludge incinerator one-time investment is large, running cost is high, through discharged in burning, to the tail gas in environment, the pollution of dioxin and heavy metal be can cause, tender subject that the public pays special attention to and the focus of environment colony event become.Sludge composting is owing to containing a certain amount of heavy metal and affect the application of its composting production in mud, especially agricultural or avoid entering aspect food chain and be restricted always, cause sludge composting outlet to encounter a difficulty and hard to carry on.Sludge composting foul smell is large, huge to surrounding environment influence, and compost treatment production process and quality product are difficult to control.At present, very fast as cement additive, brickmaking and this several respects technical development of artificial lightweight aggregate with mud, good market prospect, but also there is at present the shortcoming that technology is not mature enough or the amount of dissolving is too little in these techniques, such as mud is made the innoxious problem that building materials do not solve mud; The dissolve ratio of mud of production of construction materials technique is limited, the mud that cannot dissolve and produce continually; Because China is not at present still about standard or the standard of mud heavy metal restriction in building materials utilize, directly utilization meeting produces potential harm to human health in addition.
Pyrolyzing sludge technique be without in (lacking) oxygen atmosphere with certain temperature lignin-sludge, be a kind of new sludge treatment technique.Owing to producing the pyrolysis oil gas that can be used as fuel utilization and the sludge organism charcoal that can be used as pollutant absorbent in pyrolytic process, and with respect to traditional treatment process, pollutant discharge amount in pyrolysis processing process obviously reduces, and pyrolysis method can be processed various sewage sludges, be not subject to the impact of mud inclusion, this is also that other method can not be compared, and therefore day by day comes into one's own.In recent years, this technology has obtained breakthrough at home, has obtained some application demonstrations aspect industrially scalable.
ZL200910039251.X patent discloses the method and apparatus that utilizes waste oil to carry out mud comprehensive treating process, this patent by after waste oil is processed using it as fuel source.Due under the existing national conditions of China, the centralized collection of waste oil is more difficult, because being prepared into biofuel, to serve as the added value of fuel higher by it; On the other hand, because the water ratio of mud after simple dehydration is still up to more than 80%, directly enter after destructive distillation device, pyrolysis drying stage in early stage need consume the more indirect heating energy, can increase running cost, cause the temperature fluctuation in destructive distillation device larger, simultaneously because sludge components is complicated, make pyrolysis production technique unstable and be difficult to control, also cannot guarantee the quality of charcoal.
Utility model content
The purpose of this utility model is for overcoming existing mud conventional process technical deficiency, solve that existing mud destructive distillation treatment technology fuel source cannot ensure, energy consumption is high, wayward, be difficult to guarantee the problems such as processing efficiency and quality product, a kind of sludge deep treatment process and related device based on preparing charcoal is provided, had that investment cost is low, processing efficiency is high, an advantage such as lasting, recycle, convenient management.
Utility model designer finds by theoretical analysis and concrete practice, can obtain by the improvement of following measures a kind of sludge deep treatment unit of efficient energy-saving, and obtains the charcoal of excellent product performance.
First can adopt preconditioning technique (as mechanical deep dehydration) to reduce the water ratio of mud, thereby reduce energy consumption and the working cost of subsequent technique.Preferably to mud first nurse one's health rupture of membranes again the mode of deep dehydration reduce water ratio.In the utility model, after rupture of membranes, in mud, add inorganic coagulant, sludge modification agent and organic polymer coagulating agent again.By the synergy of above various medicaments, can change the surface charge of mud, promote cohesion and the sedimentation of mud granule, promote the cohesion of mud granule, concentrated through machinery afterwards again, as the effect of sheet frame mechanical expression, can remove most interstitial water and capillary water, obtaining water ratio is the dehydrated sludge cake below 60%.
Secondly, in the utility model, being dried of mud is separated with pyrolytic process, in whizzer and pyrolyzing sludge stove, carry out respectively, to improve the thermo-efficiency of dry and pyrolytic process.In drying process, in the utility model, preferred drying temperature is 120-135 ℃, both drying rate best in this process and stable drying process can have been guaranteed, make the heat that biomass combustion produces be passed to Sludge Surface, promote surperficial hygroscopic water rapid evaporation, can avoid again heat under excessive temperature to lose in a large number, cause drying process efficiency to decline, running cost rises.In addition, from process safety angle, consider, control this temperature range and also can avoid the danger that causes the dust explosion that Sludge Surface mummification brings due to over-drying.
In addition, in pyrolyzing sludge stove, control mud in low temperature range, under 300-400 ℃ of condition, react, make the organic matter carbonization gradually in mud.By controlling low temperature pyrogenation temperature, not only can be energy-conservation, and can reduce significantly the bioavailability of sludge heavy-metal, thus reduce potential environmental risk.
Finally, in the utility model, adopt biomass molding fuel to substitute waste oil.Biomass molding fuel is compared with waste oil, has the following advantages: 1. wide material sources, and supplier is more, and less expensive; 2. biomass molding fuel pellet density is large, volume is little, is convenient to transportation, stores and uses; 3. volatile content is high, calorific value higher (greatly about 4500-4600kcal/kg left and right), have good ignition performance, 4. the use of biomass molding fuel can reduce the discharge of atmospheric polluting material (discharges of sulfurous gas, oxynitride, heavy metal, Dioxins etc.) and reduction greenhouse gases.The gloomy biomass molding fuel of enlightening (being called for short " BMF ") that the biomass molding fuel that the utility model is selected preferentially selects Disen Heat Energy Technology Co., Ltd., Guangzhou to produce, also can be used the other biological matter shaped fuel of selling on market in addition.
In order to control anaerobic or the anoxic condition of pyrolytic process, in the utility model, the feed system of pyrolyzing sludge stove adopts rotary feeding valve, fill process guarantees that air-tight state prevents inclusion of air, gaseous tension in pyrolytic process in pyrolysis oven adopts automatically and controls, keep pressurized operation, make the air pressure of pyrolysis oven inside be slightly larger than outside normal atmosphere, be preferably greater than outside normal atmosphere 40-60Pa, thereby avoid air to enter pyrolysis oven, cause the too high and danger of blasting of oxygen.
In a word, the device that provides a kind of sludge deep to process is provided the purpose of this utility model, it is characterized in that this device has comprised sludge conditioning medicine system, mud rupture of membranes reactor, sludge dewatering equipment, sludge dryer, pyrolyzing sludge stove, biomass fuel heating system, flue gas purification system and automatic control system; Wherein sludge conditioning medicine system is connected with sludge conditioning reactor, the outlet of sludge conditioning reactor is connected with the entrance of sludge dewatering equipment through force (forcing) pump pipeline, mud after dehydration is transported to sludge dryer, the mud of sludge dryer is transported to pyrolyzing sludge stove, and the exhanst gas outlet of sludge dryer is connected with flue gas purification system; Biomass fuel heating system is provided with two hot-blast outlets, by pipeline, is connected respectively with sludge dryer with the gas inlet of pyrolyzing sludge stove, and hot-blast outlet arranges air-quantity adjusting valve; Pyrolysis oven is provided with pipeline and is connected with biomass fuel stove the inflammable gas of generation is delivered to biomass fuel stove burning, the flue gas producing in sludge dryer is transported to flue gas purification system, and automatic control system is connected with air-quantity adjusting valve, sludge dryer and pyrolyzing sludge stove on biomass fuel heating system hot-blast outlet.
Sludge conditioning medicine system in the utility model comprises rupture of membranes agent basin, inorganic coagulant basin, sludge modification agent basin, organic polymer coagulating agent basin and dosing pump.
Sludge dewatering equipment in the utility model is plate-and-frame filter press.
Sludge dryer in the utility model is revolving drier, and the gas inlet of revolving drier, rotating cylinder inside and exhanst gas outlet are provided with temperature sensor, and the monitoring data of temperature sensor is passed to automatic control system.
Pyrolyzing sludge stove in the utility model is external heat type rotary furnace, in the gas inlet of external heat type rotary furnace, rotary kiln and air vout be provided with temperature sensor, the monitoring data of temperature sensor is passed to automatic control system.
The entrance of the pyrolyzing sludge stove in the utility model is installed rotary feeding valve, and pressure transmitter is housed in pyrolysis oven, and combustible gas outlet is provided with automatic exhaust steam valve.
Flue gas purification system in the utility model comprises spray column, sack cleaner and chimney, wherein in spray column, be provided with the atomizer of spray liquid, in flue between spray column and sack cleaner, be provided with the shower nozzle that sprays charcoal powder, sack cleaner is provided with a transport pipe charcoal powder of interception is back in the mud buffering storage tank being arranged between sludge drier and pyrolyzing sludge stove.
In sum, the utility model combines by adjustment and Optimization Technology, increase suitable preconditioning technique (conditioning rupture of membranes is in conjunction with mechanical dehydration), select suitable dry and pyrolysis temperature to reduce the method for processing cost, find the secure biomass moulding in inexpensive source or the non-shaped fuel energy as an alternative simultaneously, obtained raising processing efficiency, improving product performance, reduce energy consumption, reduce the advantages such as secondary pollution, realized the thorough harmless treatment of excess sludge, the environmental friendly principle that meets current energy-saving and emission-reduction and the utilization of resources, in treating processes, pollutent generation is low, there is good sustainability.
Accompanying drawing explanation
Fig. 1 is the structural representation of sludge treatment equipment of the present utility model.
Wherein 1 is that sludge conditioning medicine system 2 is sludge conditioning reaction tank
3 is that plate-and-frame filter press 4 is that endless belt conveyor 5 is whizzer
6 is that spray column 8 is sack cleaner for cushioning storage tank 7
9 is that induced draft fan 10 is that chimney 11 is that biomass fuel lift 12 is combustion chamber
13 volume dampers 14 are overfire air fan
15 is that biomass hotblast stove 16 is that pyrolyzing sludge stove 17 is sludge organism charcoal
Embodiment
Sludge treatment equipment of the present utility model is described with reference to the accompanying drawings as follows:
The structure of sludge treatment equipment of the present utility model as shown in Figure 1.It comprises the sludge conditioning medicine system 1 of adding rupture of membranes agent, coagulating agent, properties-correcting agent and flocculation agent in subtend mud, sludge conditioning reaction tank 2, the plate-and-frame filter press 3 to deeply dehydrating sludge that supplies mud and medicament to mix, react.Water ratio is that first the pending mud of 80-99% enter into sludge conditioning reaction tank 2, then by sludge conditioning medicine system 1, in mud, add the rupture of membranes agent being formed by clorox and the vitriol oil, after rupture of membranes has reacted, add wherein again inorganic coagulant and sludge modification agent, fully after hybrid reaction, finally add organic polymer coagulating agent.Completing mud after conditioning is pumped into and in plate-and-frame filter press 3, carries out mechanical expression dehydration, the water ratio that press filtration obtains lower than 60% sludge cake by endless belt conveyor 4 be delivered in whizzer 5, sludge cake is dried in whizzer 5 at the temperature of 125-130 ℃, until its water ratio lower than 15% time, sludge-drying is proceeded in buffering storage tank 6 and temporarily stored, when reaching a certain amount of, sludge-drying is delivered to and in pyrolyzing sludge stove 16, carries out pyrolysis.The flue gas that mud produces when dry in whizzer 5 is transported to the bottom of spray column 7, contact with spray liquid with charcoal powder from bottom to top, from discharging, spray column top in flue, sprays into active carbon powder, then enter sack cleaner, enter sack cleaner 8, through sack cleaner, hold back charcoal powder particle and be collected, after purifying, flue gas discharges through chimney 10 by induced draft fan 9.Sludge-drying carries out pyrolysis being greater than without (lacking) oxygen, stove internal gas pressure under the temperature condition of outside normal atmosphere 40-60Pa and 300-400 ℃ in pyrolyzing sludge stove 16, make the organic matter carbonization gradually in mud, cracking simultaneously produces inflammable gas (comprising methane, propane, coal gas etc.), and the solid matter obtaining after pyrolysis completes is sludge organism charcoal.The biomass molding fuel of buying enters into the combustion chamber 12 of biomass thermal wind furnace 15 by biomass fuel lift 11, carry out mixed firing with the air blasting by blower fan 14, the hot blast producing is divided into two strands by volume damper 13, by pipeline, be connected with the gas inlet of pyrolyzing sludge stove with whizzer respectively, to guarantee the temperature in sludge dryer and pyrolyzing sludge stove.The inflammable gas producing in pyrolyzing sludge stove 16 is also sucked to be transported in combustion chamber 12 and burns, and reclaims its energy to realize recycle.
The utility model is compared with domestic and international similar or other technologies, has the following advantages:
(1) mud is through rupture of membranes modification and the pre-treatment of mechanism filter-pressing squeezing deep dehydration, the water ratio of mud is dropped to below 60% from 80%, remove most of moisture content, compare with common heat drying method, the about 3185MJ/kg of the Energy Intensity Reduction mud that wets, and carries out heated drying with waste oil as fuel and compares, the processing cost of mud per ton can reduce 240-250 unit (by 4000 yuan/ton of the costs of waste oil, calorific value is 39470kJ/kg, and conditioning medicament adds by 30 yuan/ton of wet mud), benefit is considerable.
(2) in sludge conditioning process, add Special modifier ZnCl
2, can in follow-up pyrolyzing sludge process, bring into play catalytic modification effect, make final solid matter---sludge organism charcoal becomes fibrous sorbing material, hole is more flourishing, specific surface area is larger, better to adsorption effects such as heavy metal substance and foul smell, can become the substitute of gac;
(3) " deeply dehydrating sludge+pyrolysis method " can process various sewage sludges, is not subject to the impact of mud inclusion, and because pyrolytic process is in anaerobic reduced state, suppressed the generation of Dioxins, and this is the maximum advantage of comparing with burning.
(4) owing to adopting biomass molding fuel, ample supply and prompt delivery, supply is stable, relative low price.And belong to compared with clean energy, being widely used, flue gas pollutant (as SO2 and NOx) quantity discharged is extremely low, has reduced gas cleaning cost.
(5) aspect construction investment, half left and right that the utility model technology is equivalent to burn; Aspect operational cost, it is only 60% left and right of burning disposal.
This technology and external producer facility investment contrast table
The economic and technical norms contrast table of mud retorting technique and other sludge disposal technology
* refer to the wet mud of water ratio 80% herein.
Claims (7)
1. the device that sludge deep is processed, is characterized in that this device has comprised sludge conditioning medicine system, mud rupture of membranes reactor, sludge dewatering equipment, sludge dryer, pyrolyzing sludge stove, biomass fuel heating system, flue gas purification system and automatic control system; Wherein sludge conditioning medicine system is connected with sludge conditioning reactor, the outlet of sludge conditioning reactor is connected with the entrance of sludge dewatering equipment through force (forcing) pump pipeline, mud after dehydration is transported to sludge dryer, the mud of sludge dryer is transported to pyrolyzing sludge stove, and the exhanst gas outlet of sludge dryer is connected with flue gas purification system; Biomass fuel heating system is provided with two hot-blast outlets, by pipeline, is connected respectively with sludge dryer with the gas inlet of pyrolyzing sludge stove, and hot-blast outlet arranges air-quantity adjusting valve; Pyrolysis oven is provided with pipeline and is connected with biomass fuel stove the inflammable gas of generation is delivered to biomass fuel stove burning, the flue gas producing in sludge dryer is transported to flue gas purification system, and automatic control system is connected with air-quantity adjusting valve, sludge dryer and pyrolyzing sludge stove on biomass fuel heating system hot-blast outlet.
2. the device that sludge deep as claimed in claim 1 is processed, is characterized in that sludge conditioning medicine system comprises rupture of membranes agent basin, inorganic coagulant basin, sludge modification agent basin, organic polymer coagulating agent basin and dosing pump.
3. the device that sludge deep as claimed in claim 1 is processed, is characterized in that described sludge dewatering equipment is plate-and-frame filter press.
4. the device that sludge deep as claimed in claim 1 is processed, it is characterized in that sludge dryer is revolving drier, the gas inlet of revolving drier, rotating cylinder inside and exhanst gas outlet are provided with temperature sensor, and the monitoring data of temperature sensor is passed to automatic control system.
5. the device that sludge deep as claimed in claim 1 is processed, it is characterized in that pyrolyzing sludge stove is external heat type rotary furnace, in the gas inlet of external heat type rotary furnace, rotary kiln and air vout be provided with temperature sensor, the monitoring data of temperature sensor is passed to automatic control system.
6. the device that sludge deep as claimed in claim 1 is processed, is characterized in that the entrance of described pyrolyzing sludge stove is installed rotary feeding valve, and pressure transmitter is housed in pyrolysis oven, and combustible gas outlet is provided with automatic exhaust steam valve.
7. the device that sludge deep as claimed in claim 1 is processed, it is characterized in that described flue gas purification system comprises spray column, sack cleaner and chimney, wherein in spray column, be provided with the atomizer of spray liquid, in flue between spray column and sack cleaner, be provided with the shower nozzle that sprays charcoal powder, sack cleaner is provided with a transport pipe charcoal powder of interception is back in the mud buffering storage tank being arranged between sludge drier and pyrolyzing sludge stove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320461651.1U CN203487018U (en) | 2013-07-30 | 2013-07-30 | Deep treatment device for sludge |
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| CN201320461651.1U CN203487018U (en) | 2013-07-30 | 2013-07-30 | Deep treatment device for sludge |
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| CN201320461651.1U Expired - Lifetime CN203487018U (en) | 2013-07-30 | 2013-07-30 | Deep treatment device for sludge |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176896A (en) * | 2014-08-26 | 2014-12-03 | 高云 | Sludge drying treatment equipment and method |
| CN104402187A (en) * | 2014-08-07 | 2015-03-11 | 胡延节 | Combined facility for making sludge synthetic fuel |
| CN104460486A (en) * | 2014-10-15 | 2015-03-25 | 上海同臣环保有限公司 | Automatic sludge inlet control system and method for sludge pressing device |
| CN106007297A (en) * | 2016-07-27 | 2016-10-12 | 西南石油大学 | Mercury-containing sludge heat treatment method |
| CN106587561A (en) * | 2016-12-07 | 2017-04-26 | 广东昕旺环保科技发展有限公司 | Sludge pyrohydrolysis and gasification processing system and treatment process thereof |
| CN106986520A (en) * | 2017-03-24 | 2017-07-28 | 江苏丰源环保科技工程有限公司 | A kind of drying sludge carbonization combined unit |
| CN109437506A (en) * | 2018-12-19 | 2019-03-08 | 上海市离心机械研究所有限公司 | Centrifugal drying integral system and its fast cooling method |
| CN109652090A (en) * | 2019-01-29 | 2019-04-19 | 北京云水浩瑞环境科技有限公司 | The system and method for soil conditioner is prepared using sludge and biomass |
| CN109836022A (en) * | 2019-03-07 | 2019-06-04 | 中环乐创(天津)环保科技有限公司 | Sludge treating system and sludge drying mechanism |
| US11807565B2 (en) * | 2021-04-16 | 2023-11-07 | Kenneth Brummett | Remediation of per- and poly-fluoroalkyl substances in wastewater |
-
2013
- 2013-07-30 CN CN201320461651.1U patent/CN203487018U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402187A (en) * | 2014-08-07 | 2015-03-11 | 胡延节 | Combined facility for making sludge synthetic fuel |
| CN104176896A (en) * | 2014-08-26 | 2014-12-03 | 高云 | Sludge drying treatment equipment and method |
| CN104460486A (en) * | 2014-10-15 | 2015-03-25 | 上海同臣环保有限公司 | Automatic sludge inlet control system and method for sludge pressing device |
| CN104460486B (en) * | 2014-10-15 | 2017-07-07 | 上海同臣环保有限公司 | Sludge pressing equipment enters mud control system and control method automatically |
| CN106007297B (en) * | 2016-07-27 | 2022-04-19 | 西南石油大学 | Mercury-containing sludge heat treatment method |
| CN106007297A (en) * | 2016-07-27 | 2016-10-12 | 西南石油大学 | Mercury-containing sludge heat treatment method |
| CN106587561A (en) * | 2016-12-07 | 2017-04-26 | 广东昕旺环保科技发展有限公司 | Sludge pyrohydrolysis and gasification processing system and treatment process thereof |
| CN106986520A (en) * | 2017-03-24 | 2017-07-28 | 江苏丰源环保科技工程有限公司 | A kind of drying sludge carbonization combined unit |
| CN109437506A (en) * | 2018-12-19 | 2019-03-08 | 上海市离心机械研究所有限公司 | Centrifugal drying integral system and its fast cooling method |
| CN109437506B (en) * | 2018-12-19 | 2023-09-22 | 上海市离心机械研究所有限公司 | Centrifugal dehydration and drying integrated system and rapid cooling method thereof |
| CN109652090A (en) * | 2019-01-29 | 2019-04-19 | 北京云水浩瑞环境科技有限公司 | The system and method for soil conditioner is prepared using sludge and biomass |
| CN109836022A (en) * | 2019-03-07 | 2019-06-04 | 中环乐创(天津)环保科技有限公司 | Sludge treating system and sludge drying mechanism |
| US11807565B2 (en) * | 2021-04-16 | 2023-11-07 | Kenneth Brummett | Remediation of per- and poly-fluoroalkyl substances in wastewater |
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Granted publication date: 20140319 |