CN104529104A - Sludge pretreatment method - Google Patents
Sludge pretreatment method Download PDFInfo
- Publication number
- CN104529104A CN104529104A CN201410840079.9A CN201410840079A CN104529104A CN 104529104 A CN104529104 A CN 104529104A CN 201410840079 A CN201410840079 A CN 201410840079A CN 104529104 A CN104529104 A CN 104529104A
- Authority
- CN
- China
- Prior art keywords
- mud
- sludge
- treatment method
- whipping appts
- sludge pre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge pretreatment method and relates to the technical field of sludge treatment. The sludge pretreatment method aims at solving the problems of large viscosity, poor fluidity and transportation difficulty of sludge in the prior art. The sludge pretreatment method comprises the following step: heating the sludge of which the fluidity needs to be improved to 45-95 DEG C, and driving the sludge to do shear movement. The method is used for pretreatment of the sludge.
Description
Technical field
The present invention relates to technical field of sludge treatment, particularly relate to a kind of sludge pre-treatment method.
Background technology
The process of municipal effluent mainly adopts activated sludge process, and in sewage treatment process, 8 tons, the mud of every ten thousand tons of sewage generations moisture 80%, the output of the annual mud of China is more than 3,000 ten thousand tons (moisture 80%).Along with people improve the attention degree of environmental problem, clean and effective is treated as the basic goal of sludge disposal technology.
Sludge treatment be complete smoothly for the ease of precipitation and press filtration operation in sewage treatment process through step, usually, polyacrylamide must be added in mud, polyacrylamide is a kind of polymeric flocculant, can the sedimentation of accelerate sludge and other microorganisms.
Owing to increasing polyacrylamide in mud, sedimentation the viscosity of mud after press filtration is large, poor fluidity, thus the storage and the transport difficult that cause mud.
Summary of the invention
Embodiments of the invention provide a kind of sludge pre-treatment method, and in order to solve, sewage sludge viscosity of the prior art is large, the problem of poor fluidity and transport difficult.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of sludge pre-treatment method, comprises the following steps:
Make to wait that the mud temperature increase improving mobility is to 45-95 DEG C;
Make described mud generation shearing motion.
Preferably, before 45-95 DEG C of step, also step is comprised in the described mud temperature increase waiting to improve mobility that makes:
In described mud, add admixture, described mud mobility is improved.
Wherein, described admixture is water or middle water.
Preferably, described admixture comprises one or more in bases, carbonate or persulfuric acid salt.
Preferably, the mud temperature increase making to wait to improve mobility described in comprises to the mode of 45-95 DEG C: to mud external heat, in mud, add hot water, pass in mud in the modes such as high-temperature steam any one or multiple.
Wherein, the temperature of described hot water is 60-250 DEG C of scope, and pressure is in normal pressure-4.5MPa scope.
Preferably, the temperature of described high-temperature steam is 100-350 DEG C of scope, and pressure is in normal pressure-8MPa scope.
Preferably, the step of described mud generation shearing motion is made to comprise described in: to make described mud generation shearing motion by the mode stirred.
Wherein, the described mode by stirring makes the step of described mud generation shearing motion comprise: in described mud, arrange one or more whipping appts, each described whipping appts has single or multiple lift blade, uses described whipping appts to stir mud, makes described mud generation shearing motion.
Preferably, described mud generation shearing motion is made by the mode of whipping appts stirring at low speed and/or high-speed stirring.
Wherein, rotating speed during described whipping appts stirring at low speed is 10-200 rev/min, and churning time is 1-3.5 hour; Rotating speed during described whipping appts high-speed stirring is 201-2000 rev/min, and churning time is 0.5-3.5 hour; Rotating speed when described whipping appts stirring at low speed and high-speed stirring combine is 10-2000 rev/min, and churning time is 0.5-3.5 hour.
Wherein, described bases comprises sodium hydroxide, potassium hydroxide and calcium hydroxide; Described carbonate comprises sodium carbonate and calcium carbonate; Described persulfuric acid salt comprises Sodium Persulfate, Potassium Persulphate, persulfuric acid calcium.
In the sludge pre-treatment method that the embodiment of the present invention provides, in the sludge pre-treatment method that the embodiment of the present invention provides, first by mud temperature increase to 45-95 DEG C, then make mud generation shearing motion.Particularly, the mud temperature increase without mobility can be made to 45-95 DEG C by preliminary pre-treatment, recycling shearing means make mud generation shearing motion, thus reduce the viscosity of mud, improve the mobility of mud, are more convenient to the transport of mud.
Accompanying drawing explanation
A kind of sludge pre-treatment method that Fig. 1 provides for the embodiment of the present invention;
The another kind of sludge pre-treatment method that Fig. 2 provides for the embodiment of the present invention;
Another sludge pre-treatment method that Fig. 3 provides for the embodiment of the present invention;
Another sludge pre-treatment method that Fig. 4 provides for the embodiment of the present invention;
A kind of sludge pretreatment device that Fig. 5 provides for the embodiment of the present invention;
The another kind of sludge pretreatment device that Fig. 6 provides for the embodiment of the present invention;
Another sludge pretreatment device that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
See Fig. 1, embodiments provide a kind of sludge pre-treatment method, comprise the following steps:
101: make to wait that the mud temperature increase improving mobility is to 45-95 DEG C; 102: make mud generation shearing motion.
In the sludge pre-treatment method that the embodiment of the present invention provides, first will wait that the mud temperature increase improving mobility is to 45-95 DEG C, then make mud generation shearing motion.Particularly, can make not have mobility or the poor mud temperature increase of mobility to 45-95 DEG C by preliminary pre-treatment, recycling shearing means make mud generation shearing motion, thus reduce the viscosity of mud, improve the mobility of mud, be more convenient to the transport of mud.
In order to the lifting of accelerate sludge temperature, can make mud generation shearing motion in the process to mud temperature increase, to accelerate mud mass transfer and heat transfer process, the transmission of accelerate sludge temperature, accelerates mud slurry viscosity reduction, improves the mobility of mud.
See Fig. 2, in above-described embodiment, step 100 can also be comprised in the mud temperature increase making to wait to improve mobility before 45-95 DEG C step 101: in mud, add admixture, mud mobility is improved.Wherein, admixture can make water or middle water, can also be one or more in bases, carbonate or Sulfates.
Particularly, water or middle water can be added to being loaded with in sludge pretreatment device as required, making mud have mobility, making the mud without mobility have mobility.Thus more easily there is shearing motion.
Or, can as required to be loaded with in sludge pretreatment device add in bases, carbonate or persulfuric acid salt one or more, such as, described bases comprises sodium hydroxide, potassium hydroxide and calcium hydroxide; Described carbonate comprises sodium carbonate and calcium carbonate; Described persulfuric acid salt comprises Sodium Persulfate, Potassium Persulphate, persulfuric acid calcium.Add the precipitation that above-mentioned substance mainly promotes breaking of biomass cells in mud slurry or internal moisture.Wherein, the degraded adding mainly promotion flocculation agent polyacrylamide of persulphate, fundamentally can reduce the viscosity of mud slurry.The addition of Sodium Persulfate is 0.01 ‰-5 ‰ of dewatered sludge quality, and the feed postition of Sodium Persulfate comprises being dissolved in normal temperature or hot water to add or utilize high-temperature steam to advertise and enters.
See Fig. 3, in above-described embodiment, step 101: the mud temperature increase making to wait to improve mobility comprises to the mode of 45-95 DEG C: 301: to mud heat, in mud, add hot water and/or pass in mud in the modes such as high-temperature steam any one or multiple.High temperature can increase the mass transfer velocity of material and mud, thus makes mud slurry viscosity drop low; Wherein, the condition of hot water is: temperature 60-250 DEG C, pressure: normal pressure ~ 4.5MPa, and the condition of high-temperature steam is: 100-350 DEG C, pressure: normal pressure-8MPa.
Still see Fig. 3, in above-described embodiment, step 102: the step of described mud generation shearing motion is comprised: step 302: make described mud generation shearing motion by the mode stirred.
See Fig. 4, the means of mud generation shearing motion are made mainly to refer to stirring.Step 302: make mud generation shearing motion by the mode stirred, comprise step 402: in mud, arrange one or more whipping appts, each whipping appts has single or multiple lift blade, uses whipping appts to stir mud, by the mode stirred, make mud generation shearing motion.Wherein whipping appts can be single or multiple whipping appts, and whipping appts can be installed for top, sidewall is installed or top and sidewall are installed the mode combined and be arranged on mud splendid attire device.Each whipping appts can have single or multiple lift blade, agitating vane is paddle, one or more in turbine type, push type, serrated disks formula, anchor formula, frame combine, shearing between main purpose reinforcement mud slurry and flowing, reduce the situation that mud splendid attire device marginal existence mud slurry hangs over inwall.By high speed and lasting shearing motion, water in the pulverizing of the tissue of cellular material in mud or cell is removed, the stirring at low speed blade of whipping appts can be anchor formula, frame, serrated disks formula, paddle, turbine type, push type etc., and rotating speed is 10-200 rev/min; High-speed stirring blade can be paddle, turbine type, push type and serrated disks formula etc., and rotating speed is 201-2000 rev/min.During operation, the mode of stirring at low speed and/or high-speed stirring can be taked to make described mud generation shearing motion.When whipping appts stirring at low speed, rotating speed is generally 10-200 rev/min, and churning time is 1-3.5 hour; During whipping appts high-speed stirring, rotating speed is 201-2000 rev/min, and churning time is 0.5-3.5 hour; Rotating speed when whipping appts stirring at low speed and high-speed stirring combine is 10-2000 rev/min, and churning time is 0.5-3.5 hour.
Introduce several specific embodiment in detail below:
Embodiment one
See accompanying drawing 5, the mud splendid attire device shown in accompanying drawing 5 is utilized to carry out sludge pretreatment.Mud can enter mud splendid attire device by sludge inlet 51, flows out from sludge outlet 54.Can pass into hot water via hot water inlet 52 in described mud splendid attire device, described mud splendid attire device can comprise pre-thermal jacket 53.Wherein, the mode that whipping appts adopts paddle, serrated disks formula and frame type stirring to combine, mixing speed is 300 revs/min, and mud splendid attire device outside can arrange pre-thermal jacket 53, passes into hot water or hot steam via hot water inlet 52 in mud splendid attire device.Carried out the preheating of mud slurry by hot water or hot steam, make mud slurry temperature reach 45 ~ 70 DEG C.
Particularly, first add a certain amount of hot water by mud splendid attire device, hot water passes into from hot water inlet 52, opens whipping appts, and whipping appts starts to stir, and is joined gradually in mud splendid attire device by mud via sludge inlet 51.For serrated disks formula whipping appts, because serrated disks formula whipping appts stirring intensity is large, therefore, there is good shearing action; And frame type stirring can prevent mud slurry at mud splendid attire device external cambial stream or the situation that mud slurry hangs over inwall occurs; Paddle stirring rake can promote the Homogeneous phase mixing of mud slurry.Preferably, whipping appts churning time is at 1-2 hours window, and mud slurry never has mobility afterwards, and viscosity is reduced to 300mPas.Mud after treatment can be flowed out by sludge outlet 54.
Embodiment two
See accompanying drawing 6, the mud splendid attire device shown in accompanying drawing 6 is utilized to carry out sludge pretreatment.Mud can enter mud splendid attire device via sludge inlet 61, and steam-in 62 is for passing into steam, and mud can flow out described mud splendid attire device via sludge outlet 63.Wherein, whipping appts can arrange two groups, and whipped form adopts paddle, anchor formula combines.The whipping appts being positioned at system axle center is that multilayer paddle and the stirring of anchor formula combine, mixing speed 30 revs/min, the small-sized stirring rake of eccentric setting is high speed shear blade, mixing speed 800 revs/min, first mud is joined in mud splendid attire device by sludge inlet 61, in mud, 150-180 DEG C of high-temperature steam is passed into by steam-in 62, the high shear agitation oar of eccentric setting is utilized to improve the mobility of sludge slurry, anchor formula stirs and prevents sludge material in device external cambial stream or the situation hanging over inwall, the agitating vane that axle center is arranged promotes the inner sludge material mixing of device, by the intake of steam regulation, slurry outlet temperature is made to reach 60 ~ 95 DEG C.In mud slurry, add the sodium carbonate of butt sludge concentration 2%, stir 1.5 ~ 3 hours, mud slurry viscosity can be reduced to 300mPas.Mud after treatment can flow out via sludge outlet 63.
Embodiment three
See accompanying drawing 7, the mud splendid attire device shown in accompanying drawing 7 is utilized to carry out sludge pretreatment.Mud enters mud splendid attire device by sludge inlet 71, flows out via sludge outlet 73.Wherein, whipping appts arranges two groups, stir employing two and overlap paddle whipping appts, the whipping appts being positioned at system axle center is the paddle combination of multilayer different diameter, mixing speed is 80 revs/min, the small-sized stirring rake that angle-inserting type is arranged is high speed shear blade, rotating speed is 1500 revs/min, the outer setting companion thermal jacket 72 of mud splendid attire device, first companion's thermal jacket 72 adds 80 ~ 95 DEG C of hot water by heating tape in mud splendid attire device, mud is joined in mud splendid attire device via sludge inlet 71, utilize the mobility stirring and improve mud, the Sodium Persulfate of butt sludge quality 0.5% is added in mud, to promote the degraded of polyacrylamide, mud slurry temperature is made to reach 55 ~ 80 DEG C by accompanying heat, stir after 0.6 ~ 1.5 hour, mud slurry viscosity drop is low to 300mPas.Mud after treatment flows out via sludge outlet 73.
In the description of this specification sheets, specific features, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (12)
1. a sludge pre-treatment method, is characterized in that, comprises the following steps:
Make to wait that the mud temperature increase improving mobility is to 45-95 DEG C;
Make described mud generation shearing motion.
2. sludge pre-treatment method according to claim 1, is characterized in that, also comprises step in the described mud temperature increase waiting to improve mobility that makes before 45-95 DEG C of step:
In described mud, add admixture, described mud mobility is improved.
3. sludge pre-treatment method according to claim 2, is characterized in that, described admixture is water or middle water.
4. sludge pre-treatment method according to claim 2, is characterized in that, described admixture comprise in bases, carbonate or persulfuric acid salt one or more.
5. the sludge pre-treatment method according to any one of claim 1-4, it is characterized in that, described in make to wait to improve mobility mud temperature increase comprise to the mode of 45-95 DEG C: to mud external heat, in mud, add hot water, pass in mud in the modes such as high-temperature steam any one or multiple.
6. sludge pre-treatment method according to claim 5, is characterized in that, the temperature of described hot water is 60-250 DEG C of scope, and pressure is in normal pressure-4.5MPa scope.
7. sludge pre-treatment method according to claim 5, is characterized in that, the temperature of described high-temperature steam is 100-350 DEG C of scope, and pressure is in normal pressure-8MPa scope.
8. the sludge pre-treatment method according to any one of claim 1-4, is characterized in that, described in the step of described mud generation shearing motion is comprised: by stir mode make described mud generation shearing motion.
9. sludge pre-treatment method according to claim 8, it is characterized in that, the described mode by stirring makes the step of described mud generation shearing motion comprise: in described mud, arrange one or more whipping appts, each described whipping appts has single or multiple lift blade, use described whipping appts to stir mud, make described mud generation shearing motion.
10. sludge pre-treatment method according to claim 8, is characterized in that, makes described mud generation shearing motion by the mode of whipping appts stirring at low speed and/or high-speed stirring.
11. sludge pre-treatment methods according to claim 10, is characterized in that, rotating speed during described whipping appts stirring at low speed is 10-200 rev/min, and churning time is 1-3.5 hour; Rotating speed during described whipping appts high-speed stirring is 201-2000 rev/min, and churning time is 0.5-3.5 hour; Rotating speed when described whipping appts stirring at low speed and high-speed stirring combine is 10-2000 rev/min, and churning time is 0.5-3.5 hour.
12. sludge pre-treatment methods according to claim 4, is characterized in that, described bases comprises sodium hydroxide, potassium hydroxide and calcium hydroxide; Described carbonate comprises sodium carbonate and calcium carbonate; Described persulfuric acid salt comprises Sodium Persulfate, Potassium Persulphate, persulfuric acid calcium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410840079.9A CN104529104A (en) | 2014-12-30 | 2014-12-30 | Sludge pretreatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410840079.9A CN104529104A (en) | 2014-12-30 | 2014-12-30 | Sludge pretreatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104529104A true CN104529104A (en) | 2015-04-22 |
Family
ID=52844798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410840079.9A Pending CN104529104A (en) | 2014-12-30 | 2014-12-30 | Sludge pretreatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104529104A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502885A (en) * | 2016-01-15 | 2016-04-20 | 中和荣华环保科技(北京)有限公司 | Two-section backflow type sludge lime stable drying system |
| CN106145579A (en) * | 2016-08-05 | 2016-11-23 | 华东理工大学 | Alkaline residue and excess sludge coupled rotational flow release carbon method and device |
| CN106179019A (en) * | 2016-07-13 | 2016-12-07 | 无锡派乐科技有限公司 | A kind of mud mixing quality-adjusting device monitored based on stirring resistance and discharge resistance |
| CN107777857A (en) * | 2017-06-23 | 2018-03-09 | 西南大学 | Heat treatment combine shearing improves the method that sludge releases phosphorus ability |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783878B2 (en) * | 1991-04-26 | 1995-09-13 | 日本碍子株式会社 | Sewage sludge treatment method |
| CN1190383A (en) * | 1995-05-18 | 1998-08-12 | Rdp公司 | Process and apparatus for liquid sludge stabilization |
| CN1369445A (en) * | 2002-03-22 | 2002-09-18 | 邵胜学 | Process for treating sewage to generate active mud and extract protein |
| CN101037289A (en) * | 2007-03-15 | 2007-09-19 | 黄丹喜 | Method for recovering and reusing industrial acid-washed metal sludge in steel plate production |
| CN101443091A (en) * | 2006-09-12 | 2009-05-27 | 巴工业株式会社 | Flocculator |
| CN102614809A (en) * | 2012-03-02 | 2012-08-01 | 山东大学 | Method for preparing dispersing-stabilizing agent by using papermaking sludge |
| KR20140025865A (en) * | 2012-08-23 | 2014-03-05 | 에스워터(주) | Apparatus for pretreatment of waste activated sludge and waste activated sludge pretreatment process by using same |
| CN203613190U (en) * | 2014-01-21 | 2014-05-28 | 山东宝力生物质能源股份有限公司 | Lateral stirring fermentation tank |
| CN104150517A (en) * | 2014-08-04 | 2014-11-19 | 南通科纯化工有限公司 | Comprehensive utilization and production method for treating two wastes |
-
2014
- 2014-12-30 CN CN201410840079.9A patent/CN104529104A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783878B2 (en) * | 1991-04-26 | 1995-09-13 | 日本碍子株式会社 | Sewage sludge treatment method |
| CN1190383A (en) * | 1995-05-18 | 1998-08-12 | Rdp公司 | Process and apparatus for liquid sludge stabilization |
| CN1369445A (en) * | 2002-03-22 | 2002-09-18 | 邵胜学 | Process for treating sewage to generate active mud and extract protein |
| CN101443091A (en) * | 2006-09-12 | 2009-05-27 | 巴工业株式会社 | Flocculator |
| CN101037289A (en) * | 2007-03-15 | 2007-09-19 | 黄丹喜 | Method for recovering and reusing industrial acid-washed metal sludge in steel plate production |
| CN102614809A (en) * | 2012-03-02 | 2012-08-01 | 山东大学 | Method for preparing dispersing-stabilizing agent by using papermaking sludge |
| KR20140025865A (en) * | 2012-08-23 | 2014-03-05 | 에스워터(주) | Apparatus for pretreatment of waste activated sludge and waste activated sludge pretreatment process by using same |
| CN203613190U (en) * | 2014-01-21 | 2014-05-28 | 山东宝力生物质能源股份有限公司 | Lateral stirring fermentation tank |
| CN104150517A (en) * | 2014-08-04 | 2014-11-19 | 南通科纯化工有限公司 | Comprehensive utilization and production method for treating two wastes |
Non-Patent Citations (1)
| Title |
|---|
| 呼庆等: "分散剂对脱水污泥流动性能的影响", 《环境科学与技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502885A (en) * | 2016-01-15 | 2016-04-20 | 中和荣华环保科技(北京)有限公司 | Two-section backflow type sludge lime stable drying system |
| CN106179019A (en) * | 2016-07-13 | 2016-12-07 | 无锡派乐科技有限公司 | A kind of mud mixing quality-adjusting device monitored based on stirring resistance and discharge resistance |
| CN106145579A (en) * | 2016-08-05 | 2016-11-23 | 华东理工大学 | Alkaline residue and excess sludge coupled rotational flow release carbon method and device |
| CN106145579B (en) * | 2016-08-05 | 2020-07-28 | 华东理工大学 | Alkali residue and excess sludge coupling rotational flow carbon release method and device |
| CN107777857A (en) * | 2017-06-23 | 2018-03-09 | 西南大学 | Heat treatment combine shearing improves the method that sludge releases phosphorus ability |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104529104A (en) | Sludge pretreatment method | |
| CN102977227B (en) | Method for preparing chitosan-like efficient flocculant | |
| CN110615593A (en) | Method for separating active sludge biomass by high-speed mechanical cyclone | |
| CN106103362B (en) | Continuous thermal hydrolysis method for sludge with high dryness | |
| CN112679065B (en) | Organic solid waste thermal hydrolysis treatment system and treatment process thereof | |
| CN102351368B (en) | Loading flocculation pretreatment method of antibiotic fermentation wastewater | |
| CN104591498B (en) | Kitchen sewage treatment process | |
| CN105254150A (en) | Pretreatment method for increasing yield of excess sludge anaerobic digestion methane | |
| CN100500601C (en) | Sludge hot digesting apparatus for preparing biological solid | |
| CN106755141A (en) | The method that pyrohydrolysis joint high temperature anaerobic acidifying improves acidogenesis of waste activated sludge amount | |
| CN105565620A (en) | Chemical sludge stabilization method and treatment device | |
| US10981820B2 (en) | Sludge dewatering process assisted by flocculating reactant and plant for the implementation of such a process | |
| CN210764915U (en) | Device for stripping and recycling extracellular polymer of excess sludge | |
| CN101717175B (en) | Constant-pressure muggy gasification and pyrolysis conditioning method of sludge in sewage plant | |
| CN103482744B (en) | A kind of horizontal sedimentation tank with sludge modification return-flow system and reflow method thereof | |
| CN109439539A (en) | Plug-flow anaerobic fermentation system and method are forced in buried segmentation | |
| JP5742254B2 (en) | Organic wastewater treatment method | |
| CN101591055B (en) | Method for strengthening treatment of printing and dyeing wastewater by printing and dyeing sludge firing product and acid leaching solution thereof | |
| CN104291440A (en) | Method for promoting hydrolytic acidification process in anaerobic tank | |
| CN105800896A (en) | Two-stage oil residue sludge anaerobic digestion method and device | |
| CN203486952U (en) | Horizontal sedimentation tank with sludge modified backflow system | |
| CN102531117A (en) | Composite inorganic water purifying agent and preparation method thereof | |
| CN106430692A (en) | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method | |
| CN211800755U (en) | Preparation facilities of flocculating agent for alumina production | |
| CN211463121U (en) | Production line of filtrate reducer for drilling fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |
|
| RJ01 | Rejection of invention patent application after publication |