CN105132468A - Kitchen waste and sludge combined pretreatment method and device for methane production - Google Patents
Kitchen waste and sludge combined pretreatment method and device for methane production Download PDFInfo
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- CN105132468A CN105132468A CN201510530280.1A CN201510530280A CN105132468A CN 105132468 A CN105132468 A CN 105132468A CN 201510530280 A CN201510530280 A CN 201510530280A CN 105132468 A CN105132468 A CN 105132468A
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- food waste
- changing food
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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
- 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
Abstract
The invention relates to a kitchen waste and sludge combined pretreatment method for methane production. The method comprises the following steps: crushing kitchen waste and sludge by a crushing cylinder; pouring the crushed object into an agitation tank, performing pretreatment at 85-95 DEG C, and stirring at the speed of 115-125 r/min for 1-3 h; and readjusting the temperature to be 25-35 DEG C, the stirring speed to be 25-35 r/min and the stirring time to be 9-11 days. A kitchen waste and sludge combined pretreatment device for methane production comprises an agitation tank and a crushing cylinder mounted at the upper end of the agitation tank, wherein a discharge pipe is arranged on the crushing cylinder; and a wall-type heater is mounted on the inner wall of the agitation tank, and an exhaust opening is formed in the upper end of the agitation tank. According to the kitchen waste and sludge combined pretreatment method and device for methane production, on one hand, the viscosities of both sludge and kitchen waste can be reduced to bring convenience for performing the stirring function; and on the other hand, the pretreatment step is added to the crushed object, so that preliminary release of silicon sources of both sludge and kitchen waste can be realized.
Description
Technical field
The present invention relates to a kind of changing food waste associating methanogenic method of sludge pretreatment and device.
Background technology
Along with the continuous lifting of standard of living, solid waste (as mud and changing food waste) generation constantly increases, and current China produces 3000 ten thousand tons, mud per year, produces changing food waste 4,000 ten thousand tons per year; Due to the lasting construction of national conservation culture, resource utilization and the harmlessness disposing technological method of solid waste need further raising badly.But China is be sent to garbage burning factory to carry out burning electricity generation for the main processing ways that changing food waste and mud are taked, and is totally in the preliminary stage of solid waste disposal.Adopt the organic solid waste of anaerobic fermentation technology process to be one of emphasis of solidification disposal of waste technical development, but the technique device of mud and changing food waste anaerobic fermentation is lacked operability.The patent of invention that such as public announcement of a patent application number is CN103923951A disclose a kind of ultrasonic/method of acid treatment strengthening garbage anaerobic fermentation, this method step is comparatively loaded down with trivial details, and only carry out pre-treatment to from changing food waste, any process is not done to the seed sludge of its equal proportion, increases the anaerobically fermenting time.
Therefore, propose a kind ofly to carry out comprehensive pretreatment and pretreated method and design a kind of easy to operate, that fermentation time is short treatment unit seeming very important to changing food waste, mud.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of changing food waste to combine the methanogenic method of sludge pretreatment and device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of methanogenic method of changing food waste associating sludge pretreatment, comprises the following steps:
1., choose mud and changing food waste, processed is carried out to it;
2., by changing food waste, mud and the alkali lye after process together put into particle cylinder, through particle cylinder, changing food waste, mud are together pulverized;
3., by changing food waste, mud and the alkali lye after pulverizing together pour in stirred pot, stirred pot continues to stir broken thing to carry out pre-treatment, and pretreated temperature is 85-95 DEG C, and stirring velocity is 115-125r/min, churning time 1-3 hour;
4., stirred pot continue to broken thing stir process, readjust temperature and the speed of stirred pot, temperature is arranged on 25-35 DEG C, stirring velocity at 25-35r/min, churning time 9-11 days.
Further, described step 1. in, the mass ratio of dehydrated sludge and changing food waste is 1:2, and its mud solid content is 9-11%, and changing food waste concentration is 25-35g/l.
Further, described step 2. in, material grains diameter≤5mm after pulverizer fragmentation.
Further, described step 2. in, the pH value of alkali lye is 9-11.
Further, described step 2. in, alkali lye is poured in particle cylinder according to the speed of 0.1-0.3L/min.
The methanogenic device of a kind of changing food waste associating sludge pretreatment, comprise stirred pot and particle cylinder, described particle cylinder is arranged on the upper end of stirred pot, described particle cylinder is provided with drainage conduit, the inner space of described drainage conduit and stirred pot;
The inwall of described stirred pot is provided with wall type well heater, and the upper end of described stirred pot is provided with the venting port for discharging methane.
Further, the lower end of described stirred pot is provided with slag-drip opening.
Further, described particle cylinder comprises cylindrical shell, the particle axle installing particle blade and the first motor, and described particle axle is arranged in cylindrical shell, and described first motor is connected with the first motor-driven.
Further, described stirred pot comprises tank body, stir shaft and the second motor, and described stir shaft is arranged in tank body, and described second motor and stir shaft are in transmission connection.
Further, the bottom of described tank body is provided with support.
The invention has the beneficial effects as follows: the inventive method, the viscosity that can reduce mud and changing food waste is on the one hand convenient to realize agitating function; On the other hand, pre-treatment step is increased to broken thing, tentatively can discharge the carbon source of mud and changing food waste; Alkaline Pretreatment discharges the carbon source of mud and changing food waste further, accelerates the methane content of anaerobically fermenting methanogenic time and increase anaerobically fermenting, to realize the processed continuously object of pulverizer and fermentor tank.
Realize the integration operation of broken pretreatment process, alkaline Pretreatment process and anaerobic fermentation process, reduce manual steps and improve anaerobically fermenting efficiency.
Material grains diameter≤5mm after pulverizer fragmentation, reduces substance viscosity and makes broken material directly enter tank body with liquid-flow, the carbon source of preliminary release mud and changing food waste.
The condition relative loose of the alkaline Pretreatment process after broken pre-treatment, easily can realize the slurrying process (i.e. the decomposition of anaerobically fermenting and hydrolytic process) of changing food waste and mud.
Method of the present invention, simply, energy consumption is low, and reaction terminates secondary fermentation residue and gets rid of can separately use it for anything else through slag-drip opening.
Device of the present invention, together with being arranged on stirred pot by particle cylinder, thus the material after the fragmentation of particle cylinder can directly drainage conduit pass in the inner chamber of stirred pot, improves processing efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is the schematic diagram of apparatus of the present invention;
Wherein, 1, tank body, 2, cylindrical shell, 3, drainage conduit, 4, wall type well heater, 5, venting port, 6, stir shaft.
Embodiment
The present invention is further illustrated in conjunction with specific embodiments now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present invention in a schematic way, and therefore it only shows the formation relevant with the present invention.
A kind of methanogenic method of changing food waste associating sludge pretreatment, comprises the following steps:
1., choose mud and changing food waste, processed is carried out to it; The mass ratio of dehydrated sludge and changing food waste is 1:2, and its mud solid content is 9-11%, preferably 10%, and changing food waste concentration is 25-35g/l, preferred 30g/l.
2., by changing food waste, mud and the alkali lye after process together put into particle cylinder, through particle cylinder, changing food waste, mud are together pulverized; Material grains diameter≤5mm after pulverizer fragmentation.The pH value of alkali lye is 9-11, and preferable ph is 10, and alkali lye is poured in particle cylinder according to the speed of 0.1-0.3L/min, the preferred 0.2L/min of speed.
3., changing food waste, mud and alkali lye after pulverizing are together poured in stirred pot, stirred pot continues to stir broken thing to carry out pre-treatment, pretreated temperature is 85-95 DEG C, preferably 90 DEG C, stirring velocity is 115-125r/min, preferred 120r/min, churning time 1-3 hour, churning time preferably 1 hour.
4., stirred pot continue to broken thing stir process, readjust temperature and the speed of stirred pot, temperature is arranged on 25-35 DEG C, preferably 30 DEG C, stirring velocity at 25-35r/min, the preferred 30r/min of stirring velocity, churning time 9-11 days., preferably 10 days time.
As shown in Figure 1, the methanogenic device of a kind of changing food waste associating sludge pretreatment, comprise stirred pot and particle cylinder, particle cylinder is arranged on the upper end of stirred pot, particle cylinder is provided with drainage conduit 3, the inner space of drainage conduit 3 and stirred pot; The inwall of stirred pot is provided with wall type well heater 4, and the upper end of stirred pot is provided with the venting port 5 for discharging methane.
Stirred pot comprises tank body 1, stir shaft 6 and the second motor, and stir shaft 6 is arranged in tank body 1, and the second motor and stir shaft 6 are in transmission connection.The bottom of tank body 1 is provided with support.The lower end of stirred pot is provided with slag-drip opening.
Particle cylinder comprises cylindrical shell 2, the particle axle installing particle blade and the first motor, and particle axle is arranged in cylindrical shell 2, and the first motor is connected with the first motor-driven.
Embodiment 1: choose 400g changing food waste and 200g mud, then processed is carried out, 400g meal kitchen rubbish concentration is 30g/l, 200g mud solid content is 10%, then pour into together with alkali lye in particle cylinder, it is pulverized rear material grains diameter and is not more than 5mm, flow into the sodium hydroxide solution of pH=10 to opening for feed according to the speed of 0.2L/min in shattering process, after reaching requirement, drainage conduit 3 through particle cylinder flows in stirred pot together through material, then pre-treatment is carried out, during pre-treatment, wall type well heater 4 temperature is adjusted to 90 DEG C, stir shaft 6 speed 120r/min, churning time 1 hour, after pre-treatment is complete, wall type well heater 4 temperature is adjusted to 30 DEG C, stir shaft 6 speed 30r/min, churning time 10 days, the methane gas produced all is discharged from the venting port 5 of stirred pot upper end, and draw as calculated, the total amount of methane is 6000ml, and the total amount of the methane in the past do not produced through pretreated method is 5000ml.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (10)
1. the methanogenic method of changing food waste associating sludge pretreatment, is characterized in that, comprise the following steps:
1., choose mud and changing food waste, processed is carried out to it;
2., by changing food waste, mud and the alkali lye after process together put into particle cylinder, through particle cylinder, changing food waste, mud are together pulverized;
3., by changing food waste, mud and the alkali lye after pulverizing together pour in stirred pot, stirred pot continues to stir broken thing to carry out pre-treatment, and pretreated temperature is 85-95 DEG C, and stirring velocity is 115-125r/min, churning time 1-3 hour;
4., stirred pot continue to broken thing stir process, readjust temperature and the speed of stirred pot, temperature is arranged on 25-35 DEG C, stirring velocity at 25-35r/min, churning time 9-11 days.
2. the methanogenic method of changing food waste associating sludge pretreatment according to claim 1, it is characterized in that, described step 1. in, the mass ratio of dehydrated sludge and changing food waste is 1:2, its mud solid content is 9-11%, and changing food waste concentration is 25-35g/l.
3. the methanogenic method of changing food waste according to claim 1 associating sludge pretreatment, is characterized in that, described step 2. in, material grains diameter≤5mm after pulverizer fragmentation.
4. the methanogenic method of changing food waste according to claim 1 associating sludge pretreatment, is characterized in that, described step 2. in, the pH value of alkali lye is 9-11.
5. the methanogenic method of changing food waste according to claim 1 associating sludge pretreatment, is characterized in that, described step 2. in, alkali lye is poured in particle cylinder according to the speed of 0.1-0.3L/min.
6. the methanogenic device of changing food waste associating sludge pretreatment, it is characterized in that, comprise stirred pot and particle cylinder, described particle cylinder is arranged on the upper end of stirred pot, described particle cylinder is provided with drainage conduit (3), the inner space of described drainage conduit (3) and stirred pot;
The inwall of described stirred pot is provided with wall type well heater (4), and the upper end of described stirred pot is provided with the venting port (5) for discharging methane.
7. the methanogenic device of changing food waste associating sludge pretreatment according to claim 6, it is characterized in that, the lower end of described stirred pot is provided with slag-drip opening.
8. the methanogenic device of changing food waste associating sludge pretreatment according to claim 6, it is characterized in that, described particle cylinder comprises cylindrical shell (2), the particle axle installing particle blade and the first motor, described particle axle is arranged in cylindrical shell (2), and described first motor is connected with the first motor-driven.
9. the methanogenic device of changing food waste associating sludge pretreatment according to claim 6, it is characterized in that, described stirred pot comprises tank body (1), stir shaft (6) and the second motor, described stir shaft (6) is arranged in tank body (1), and described second motor and stir shaft (6) are in transmission connection.
10. the methanogenic device of changing food waste associating sludge pretreatment according to claim 9, it is characterized in that, the bottom of described tank body (1) is provided with support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530280.1A CN105132468A (en) | 2015-08-27 | 2015-08-27 | Kitchen waste and sludge combined pretreatment method and device for methane production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530280.1A CN105132468A (en) | 2015-08-27 | 2015-08-27 | Kitchen waste and sludge combined pretreatment method and device for methane production |
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| CN105132468A true CN105132468A (en) | 2015-12-09 |
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| CN201510530280.1A Pending CN105132468A (en) | 2015-08-27 | 2015-08-27 | Kitchen waste and sludge combined pretreatment method and device for methane production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245448A (en) * | 2017-08-03 | 2017-10-13 | 盐城工学院 | A kind of methane production equipment and its system |
| CN114195346A (en) * | 2021-11-30 | 2022-03-18 | 南京扬子江生态环境产业研究院有限公司 | Device for treating domestic sewage and returning compost into field without outward transportation |
Citations (3)
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|---|---|---|---|---|
| CN101134684A (en) * | 2007-07-27 | 2008-03-05 | 东莞科创未来能源科技发展有限公司 | Method for producing hydrogen and methane by kitchen waste diphasic anaerobic fermentation |
| CN101172746A (en) * | 2007-10-11 | 2008-05-07 | 南京大学 | Method and equipment for combined fermentation treatment of food garbage and sewage sludge |
| CN103923951A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for producing acid by enhancing anaerobic fermentation of kitchen waste through ultrasonic/acid pretreatment |
-
2015
- 2015-08-27 CN CN201510530280.1A patent/CN105132468A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134684A (en) * | 2007-07-27 | 2008-03-05 | 东莞科创未来能源科技发展有限公司 | Method for producing hydrogen and methane by kitchen waste diphasic anaerobic fermentation |
| CN101172746A (en) * | 2007-10-11 | 2008-05-07 | 南京大学 | Method and equipment for combined fermentation treatment of food garbage and sewage sludge |
| CN103923951A (en) * | 2014-05-05 | 2014-07-16 | 哈尔滨工业大学 | Method for producing acid by enhancing anaerobic fermentation of kitchen waste through ultrasonic/acid pretreatment |
Non-Patent Citations (2)
| Title |
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| 林云琴等: "预处理对造纸污泥和餐厨垃圾混合发酵的影响", 《华南理工大学学报（自然科学版）》 * |
| 蔺金贤: "提高剩余污泥厌氧消化过程中沼气产率的预处理技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245448A (en) * | 2017-08-03 | 2017-10-13 | 盐城工学院 | A kind of methane production equipment and its system |
| CN114195346A (en) * | 2021-11-30 | 2022-03-18 | 南京扬子江生态环境产业研究院有限公司 | Device for treating domestic sewage and returning compost into field without outward transportation |
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