WO2010104440A1 - Recovery of energy from organic wastes - Google Patents
Recovery of energy from organic wastes Download PDFInfo
- Publication number
- WO2010104440A1 WO2010104440A1 PCT/SE2010/000029 SE2010000029W WO2010104440A1 WO 2010104440 A1 WO2010104440 A1 WO 2010104440A1 SE 2010000029 W SE2010000029 W SE 2010000029W WO 2010104440 A1 WO2010104440 A1 WO 2010104440A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- process according
- rotting
- sludge
- dewatering
- ash
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/20—Dewatering by mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/70—Blending
- F23G2201/701—Blending with additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/01001—Sorting and classifying ashes or fly-ashes from the combustion chamber before further treatment
-
- 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
-
- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
Definitions
- This invention relates to a process concerning generating energy by using a combination of different techniques.
- raw material is utilised organic material discharged from water closets and sludge in suspension form from biological refining treatment.
- the sewage sludge is first treated by a mechanical purification.
- the suspension is passed through a lattice followed of a screen, or a sand trap or a sedimentation basin
- a biological purifiction treatment performed in a plant having activated sludge or a layer of a biological bed.
- biological treatment matters that are break down to carbon dioxide and water, partly due to forming of flocculates from small solid particles which are removed in a settlement basin.
- the treatment is finished by a chemical treating stage.
- divalent or trivalent salts of metals for example Al 3+
- which salts are able to precipitate solved phosphor compounds and collected in form of sludge.
- the sludge Before the sludge can be used or stored (deposited) the sludge has to be stabilised by rotting or by aeration. Outlet from industries are sometimes connected to the municipal wastewater purifying plants.
- sludge Often biological gas (methane) is produced from organic material such as sludge from both communities and industries.
- the residual sludge product contains large volumes of water and must be thickened by using different types of apparatus such as drum filters or decanter centrifuges. After thickening dry solids from about 6 % up to 25 % is obtained.
- the thickened sludge could be used as a fertiliser. Alternatively the residual sludge could be composted and used as soil.
- the energy yield of the bio gas production from the sludge is ⁇ 1 MWh per ton solid organic material. Due the high content of water in the sludge achieved even combustion does not seems do be an acceptable technique from an economical point of view. However, by using technique described in the Swedish patent 523 787 there is a possibility to reach solid content >50 %.
- This invention relates to a procedure concerning generating energy by utilise different techniques.
- raw material organic material coming out from water closets and sludge in suspension form from biological refining is utilised.
- the invention comprises important stages such as thickening, production of the gas methane, dewatering and thermal treatment by combustion or by gasification. Apparatus and theirs function will be described in the following text and by referring to figure 1.
- Outlet 1 from stables , purifying plants or a water closet is fed to a rotting tank 2 where the methane gas 3 is formed. As a residual product sludge 4 is obtained.
- the solid content after the thickening would be from 5 % up to 25 % by using a drum filter 5 or by using a centrifuge.
- a distinguishing feature of this invention is that the partially thickened sludge 6 is conveyed to a press 7 or a double wire machine where the solid content is increased to at least 48 %.
- the dewatered sludge 9 having a solid content of at least 48 % is conveyed to a combustion chamber 10 which size might be suited after the actual demand.
- a combustion chamber 10 which size might be suited after the actual demand.
- a less combustion chamber is required when solely burning sludge compared with mixtures of sludge and another organic materials, for instance wood, bark and bio oil.
- the ash contains oxides of calcium, potassium and phosphor.
- the ash would be converted to granules or pellets.
- the energy gained, as a result of the burning, should be used for recovering heat 12 (warming houses) and/or for generating electricity 13.
- gases could be converted to, for instance, to synthetic diesel.
- the annual solid weight (equal to the volume) of sludge is about 300 tons (or m 3 ) while the total weight with the water included is about 7500 tons/ m 3 since the average solid content is about 4 %.
- the residuals (4) is thickened in a decanter centrifuge (5) to solid contents of 23 % ( ⁇ 2 %). Even after the thickening in the centrifuge the solid content of sludge is too low from a economical point of view if the sludge has to be burned.
- the theoretical energy value of the mixture having a solid content of 57 % is estimated to be about 4 MWh per ton dried organic material.
- the theoretical energy contribution from the sludge was so high as 2,4 MWh (0,6x4) per ton.
- the theoretical energy yield is, indeed, surprisingly high or about 85 %.
- the mixture of sludge and saw dust having the solid content of 57 % was tested as a fuel by burning in a bio fuel furnace owned by OviksEnergi AB. There was no problems at all detected regarding the emptying the mixture from the container or feeding the furnace. The combustion of the mixture was carried out whiteout any problems. Surprisingly, indeed, was that the coatings of insoluble substances on the combustion walls was eliminated by presence of the mixture containing sludge. Moreover, it should be stated, that the ash received was easy to handling in form of fast micro particles. Of the ash granules was made having high quality with respects to hardness (means high density) and the even sizes (spread 3-8 mm).
- the ash contained a surprisingly high content of CaO (6,2 %), K 2 O (3,5 %) and phosphor as P 2 O 5 (phosphorus penta-oxide)
- the economical value was estimated to be in the range of about 600 Swedish crowns per ton bone dried ash.
- the invention is of importance with respects to create a better environment and a decreased consumption of energy. Furthermore all forms of energy reduction results in a better environment due to the consumption of fossil fuels can be reduced Thus, bio gas is produced by the rotting process and after dewatering of the residuals from the rotting a product with high energy value is achieved. By bringing back the excess water from the dewatering stage to the rotting chamber a higher yield of bio gas is obtained compared to known technique.
- the discharge of carbon dioxide among other things can be reduced significantly. Theoretically speaking a reduction in water content by 1 m 3 per ton oven dried sludge results in a reduction of the level of carbon dioxide (CO 2 ) emitted by 200 kg.
- the inventions results in an effective destruction of unknown chemicals, bacteria, virus and parasites in the sludge received in the municipal wastewater purifying plants.
- Another positive result when using the invention is that after the combustion a valuable ash is achieved which can be utilised as a fertiliser. In case gasification is utilised both heat and valuable gases is produced.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
This invention relates to a process concerning generating energy by using a combination of different techniques. As raw material is utilised organic material (1) discharged from water closets and sludge in suspension form from biological refining treatment. After production of biological gas (3) from the organic material the materials are partially thickened (5) and then mixed with solid particles (8) before mechanical dewatering (7). The process is finished by burning (10) or gasification the solid material for generating of heat (12) or electricity (13). When gasification is used, the gas formed could be converted to new chemicals. Due to the heat treatment is to be carried out at high temperatures a complete destruction of unknown chemicals is ashveid. The ash received from the alternative stage burning could be purified from heavy metals such as cadmium and mercury. After the purification the ash contents valuable chemicals such as phosphor, calcium, potassium and a lot of trace elements. Converting of the ash to granules or pellets is preferred. This type of ash can replace a lot amounts of costly commercial lime.
Description
Recovery of energy from organic wastes
This invention relates to a process concerning generating energy by using a combination of different techniques. As raw material is utilised organic material discharged from water closets and sludge in suspension form from biological refining treatment.
Prior art
In municipal wastewater purifying plants particles, biological oxygen demand matters, nutrients and other impurities , for instance infectious matters are just partly removed by mechanical and biological treatment.
Normally the sewage sludge is first treated by a mechanical purification. Thus the suspension is passed through a lattice followed of a screen, or a sand trap or a sedimentation basin Thereinafter follows a biological purifiction treatment performed in a plant having activated sludge or a layer of a biological bed. In that biological treatment matters that are break down to carbon dioxide and water, partly due to forming of flocculates from small solid particles which are removed in a settlement basin. Usually the treatment is finished by a chemical treating stage. Thus divalent or trivalent salts of metals (for example Al3+) are added and which salts are able to precipitate solved phosphor compounds and collected in form of sludge.
Before the sludge can be used or stored (deposited) the sludge has to be stabilised by rotting or by aeration. Outlet from industries are sometimes connected to the municipal wastewater purifying plants.
Often biological gas (methane) is produced from organic material such as sludge from both communities and industries. The residual sludge product contains large volumes of water and must be thickened by using different types of apparatus such as drum filters or decanter centrifuges. After thickening dry solids from about 6 % up to 25 % is obtained. The thickened sludge could be used as a fertiliser. Alternatively the residual sludge could be composted and used as soil.
Drawbacks with prior art
Since a lot of chemicals are used within the communities and that bacteria, virus and parasites of different types are common some of them are found in the sludge. It should be pointed out that within the EU-group about 110.000 commercial chemicals are registered.
The National Research Council, USA, has classified about 10 millions chemicals. Many of the chemicals are not so good for the peoples health and should not be used as a fertiliser. Moreover the sludge leak odour that disturbs the surroundings.
The energy yield of the bio gas production from the sludge is <1 MWh per ton solid organic material. Due the high content of water in the sludge achieved even combustion does not seems do be an acceptable technique from an economical point of view. However, by using technique described in the Swedish patent 523 787 there is a possibility to reach solid content >50 %.
Description of the invention
This invention relates to a procedure concerning generating energy by utilise different techniques. As raw material organic material coming out from water closets and sludge in suspension form from biological refining is utilised. The invention comprises important stages such as thickening, production of the gas methane, dewatering and thermal treatment by combustion or by gasification. Apparatus and theirs function will be described in the following text and by referring to figure 1.
Outlet 1 from stables , purifying plants or a water closet is fed to a rotting tank 2 where the methane gas 3 is formed. As a residual product sludge 4 is obtained.
Since the residual sludge is diluted in large volumes of water the main part of the water must be removed before entering a thermal treatment (combustion or gasification). That thickening can be performed by mechanical filtration and/or by dewatering in several stages.
In accordance with the invention the solid content after the thickening would be from 5 % up to 25 % by using a drum filter 5 or by using a centrifuge.
A distinguishing feature of this invention is that the partially thickened sludge 6 is conveyed to a press 7 or a double wire machine where the solid content is increased to at least 48 %.
According to the Swedish patent 523787 solid matter (henceforth named agent) in particle form could be mixed together with the sludge before entering the dewatering device. That alternative is marked by a dotted arrow 8 in figure 1. Another manner in order to increase the solid content is according to the Swedish patent 528781 where the first stage is freezing the sludge and that the second stage is melting the frozen sludge before the pressing operation is to be carried out.
The dewatered sludge 9 having a solid content of at least 48 % is conveyed to a combustion chamber 10 which size might be suited after the actual demand.
Of course a less combustion chamber is required when solely burning sludge compared with mixtures of sludge and another organic materials, for instance wood, bark and bio oil.
When burning the sludge a very important destruction of synthetic compounds is achieved.
After the burning a valuable residual product in form of ash 11 is obtained. The ash contains oxides of calcium, potassium and phosphor. The ash would be converted to granules or pellets.
The energy gained, as a result of the burning, should be used for recovering heat 12 (warming houses) and/or for generating electricity 13.
Instead of burning the residual product of sludge gasification could be used which technique is able to produce hydrogen and carbon monoxide. Two gases having high energy values.
Moreover the gases could be converted to, for instance, to synthetic diesel.
Example in accordance with the invention
At the purify plant Knorthem the annual solid weight (equal to the volume) of sludge is about 300 tons (or m3) while the total weight with the water included is about 7500 tons/ m3 since the average solid content is about 4 %. After generating of bio gas in the rotting tank (2) the residuals (4) is thickened in a decanter centrifuge (5) to solid contents of 23 % (± 2 %). Even after the thickening in the centrifuge the solid content of sludge is too low from a economical point of view if the sludge has to be burned. Therefore the partially thickened sludge was dewatered in a piston press (7) equipped with outlet pipes coupled to a main pipe (14) which one fed the excess of water back to the rotting chamber (2). By bringing back water the yield of bio gas could be increased due to the rotting reactions seldom is totally completed. Before pressing the sludge received from the centrifuge modified saw dust (8). was added and mixed together with the sludge. The content of saw dust calculated by the total weight was 40 %, while the solid content obtained of the mixture was 32,8 %. After the pressing a solid content of 57 % was achieved.
The theoretical energy value of the mixture having a solid content of 57 % is estimated to be about 4 MWh per ton dried organic material. The theoretical energy contribution from the sludge was so high as 2,4 MWh (0,6x4) per ton.
According to the invention it is possible to recover about 1 MWh by the rotting process and 2,4 MWh by burning or by gasification, which makes a total energy production of 3,4 MWh. That means, the theoretical energy yield is, indeed, surprisingly high or about 85 %.
The mixture of sludge and saw dust having the solid content of 57 % was tested as a fuel by burning in a bio fuel furnace owned by OviksEnergi AB. There was no problems at all detected regarding the emptying the mixture from the container or feeding the furnace. The combustion of the mixture was carried out whiteout any problems. Surprisingly, indeed, was that the coatings of insoluble substances on the combustion walls was eliminated by presence of the mixture containing sludge. Moreover, it should be stated, that the ash received was easy to handling in form of fast micro particles. Of the ash granules was made having high quality with respects to hardness (means high density) and the even sizes (spread 3-8 mm).
The ash contained a surprisingly high content of CaO (6,2 %), K2O (3,5 %) and phosphor as P2O5 (phosphorus penta-oxide) The economical value was estimated to be in the range of about 600 Swedish crowns per ton bone dried ash.
There are a lot of unknown chemicals in sludge produced at purifying plants. Therefore it is from a environment point of view very important to get a destruction of the chemicals. Since no organic substances could be detected in the ash it was confirmed that the combustion of the mixture had been effective. Due to the ash reacts as a strong alkalinity chemical the foreign matters as bacteria, virus and parasites was effectively destroyed in combination with the thermal process.
Advantages
The invention is of importance with respects to create a better environment and a decreased consumption of energy. Furthermore all forms of energy reduction results in a better environment due to the consumption of fossil fuels can be reduced Thus, bio gas is produced by the rotting process and after dewatering of the residuals from the rotting a product with high energy value is achieved. By bringing back the excess water from the dewatering stage to the rotting chamber a higher yield of bio gas is obtained compared to known technique. The discharge of carbon dioxide among other things can be reduced significantly. Theoretically speaking a reduction in water content by 1 m3 per ton oven dried sludge results in a reduction of the level of carbon dioxide (CO2) emitted by 200 kg. Moreover the inventions results in an effective destruction of unknown chemicals, bacteria, virus and parasites in the sludge received in the municipal wastewater purifying plants. Another positive result when using the invention is that after the combustion a valuable ash is achieved which can be utilised as a fertiliser. In case gasification is utilised both heat and valuable gases is produced.
Claims
1 A process dealing with recovery of energy from diluted organic matters, as for instance, sludge received in wastewater purifying plants comprising the sequential steps of
A the waste water (1) is treated in a rotting chamber (2) where bio gas (3) is produced B the rotting residual (4) received in the rotting chamber is thickened (5) to a solid content within the range 5-25 % C the thickened rotting residual (6) is blended with a dewatering promoting agent (8) in solid particle form. D the mixture of the rotting residual and the dewatering promoting agent is mechanical dewatered (7).
2 A process according to claim 1 which comprises that the dewatering promoting agent contains modified sawdust (8).
3 A process according to claim 1 and 2 which comprises that the mixture of the rotting residual and the dewatering promoting agent is dewatered to a solid content of at least 48 %.
4 A process according to claim 1 and 2 which comprises that the mixture of the rotting residual and the dewatering promoting agent could be frozen and then melted before the mechanical dewatering is carried out.
5 A process according to any of the claims 1-4 which comprises that the dewatered mixture is conveyed to a thermal treatment whereupon heat is generated.
6 A process according to claim 5 which comprises that chemicals are destructed by the thermal treatment.
7 A process according to claim 6 characterised in that the thermal treatment is carried out by combustion (10).
8 A process according to claim 6 characterised in that the thermal treatment is carried out by gasification.
9 A process according to claims 6-8 which comprises utilising the heat and gases for generating heat and/or electricity
10 A process according to claim 8 which comprises converting of the gases generated at the gasification are converted to organic compounds
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0900306-2 | 2009-03-10 | ||
SE0900306A SE533563C2 (en) | 2009-03-10 | 2009-03-10 | Procedure for extracting energy from organic waste |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010104440A1 true WO2010104440A1 (en) | 2010-09-16 |
Family
ID=42728555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2010/000029 WO2010104440A1 (en) | 2009-03-10 | 2010-02-08 | Recovery of energy from organic wastes |
Country Status (2)
Country | Link |
---|---|
SE (1) | SE533563C2 (en) |
WO (1) | WO2010104440A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1070864A (en) * | 1977-06-10 | 1980-01-29 | Komline-Sanderson Engineering Corporation | Sludge dewatering process |
US6171499B1 (en) * | 1997-01-06 | 2001-01-09 | Youssef Bouchalat | Optimised method for the treatment and energetic upgrading of urban and industrial sludge purifying plants |
US6410283B1 (en) * | 2001-06-07 | 2002-06-25 | Endesco Clean Harbors, L.L.C. | Conversion of sewage sludge into electric power |
SE523787C2 (en) * | 2002-01-23 | 2004-05-18 | Arne Lindahl | Process for draining liquid from difficult dewatered materials |
SE528781C2 (en) * | 2002-12-04 | 2007-02-13 | Lindahl Arne | Dewatering method, e.g. for sludge, involves converting material into granules or pellets and then cooling before dewatering |
-
2009
- 2009-03-10 SE SE0900306A patent/SE533563C2/en unknown
-
2010
- 2010-02-08 WO PCT/SE2010/000029 patent/WO2010104440A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1070864A (en) * | 1977-06-10 | 1980-01-29 | Komline-Sanderson Engineering Corporation | Sludge dewatering process |
US6171499B1 (en) * | 1997-01-06 | 2001-01-09 | Youssef Bouchalat | Optimised method for the treatment and energetic upgrading of urban and industrial sludge purifying plants |
US6410283B1 (en) * | 2001-06-07 | 2002-06-25 | Endesco Clean Harbors, L.L.C. | Conversion of sewage sludge into electric power |
SE523787C2 (en) * | 2002-01-23 | 2004-05-18 | Arne Lindahl | Process for draining liquid from difficult dewatered materials |
SE528781C2 (en) * | 2002-12-04 | 2007-02-13 | Lindahl Arne | Dewatering method, e.g. for sludge, involves converting material into granules or pellets and then cooling before dewatering |
Also Published As
Publication number | Publication date |
---|---|
SE0900306A1 (en) | 2010-09-11 |
SE533563C2 (en) | 2010-10-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Hossain et al. | Waste materials for wastewater treatment and waste adsorbents for biofuel and cement supplement applications: a critical review | |
Zhang et al. | Biochar and hydrochar derived from freshwater sludge: Characterization and possible applications | |
Fytili et al. | Utilization of sewage sludge in EU application of old and new methods—A review | |
US10836666B2 (en) | Method for oxidation of a liquid phase in a hydrothermal carbonization process | |
EP1758692A1 (en) | Method and system for the recycling of municipal solid wastes, and exploitation of the wasted solid recovery fuel | |
EP2565256A1 (en) | Reprocession of polluted biomass streams | |
CN1727085A (en) | Cleansed handling domestic garbage | |
US20220332600A1 (en) | Absorbent for municipal wastewater treatment | |
JP3981759B2 (en) | Sewage sludge treatment method | |
CN203781995U (en) | Sludge treatment system | |
WO2017222462A1 (en) | Method for oxidation of a liquid phase in a hydrothermal carbonization process | |
KR101665058B1 (en) | Method of Treatment for Food Waste | |
KR20180078369A (en) | Saline-containing food waste disposal apparatus and disposal method | |
Bazarnova et al. | Innovative technologies secondary use of processed active source | |
JP2010084078A (en) | Solid fuel and method for producing the same | |
RU2655838C2 (en) | Module for realization of supercritical technology for flow-through processing of hydrocarbon-containing waste and effluents | |
WO2010104440A1 (en) | Recovery of energy from organic wastes | |
RU2734832C1 (en) | Incineration plant, device and method | |
WO2014158058A1 (en) | Method for producing phosphorus-containing fertiliser from silt deposits of municipal wastewater treatment plants and a fertiliser produced by this method | |
RU2741102C2 (en) | Processing line for simultaneous processing of various problem wastes | |
Mansor et al. | Sludge Waste Management Techniques and Challenges in Water Resources Supply | |
Rissanen | Study on different effluent treatment sludge utilizing methods in pulp and paperboard mills | |
JP2005270696A (en) | Recycle method of sewage sludge | |
Camargo-Valero et al. | Techniques for nutrient recovery from household and industrial wastes | |
Aradelli et al. | Sewage sludge disposal routes: thermal treatments and energy recovery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10751076 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10751076 Country of ref document: EP Kind code of ref document: A1 |