CN105217912B - A kind of municipal sludge efficient energy-saving quick biological drying technology - Google Patents
A kind of municipal sludge efficient energy-saving quick biological drying technology Download PDFInfo
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- CN105217912B CN105217912B CN201510582971.6A CN201510582971A CN105217912B CN 105217912 B CN105217912 B CN 105217912B CN 201510582971 A CN201510582971 A CN 201510582971A CN 105217912 B CN105217912 B CN 105217912B
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention discloses a kind of method of the quick desiccation of municipal sludge efficient energy-saving, using high-temperature strain and corresponding aeration structure, by the quick desiccation of municipal sludge, accelerates desiccation process, saves the energy.55 DEG C of megathermal periods maintain 20 days, and 65 DEG C of megathermal periods maintain 13 days, are advantageous to thoroughly kill harmful pathogeny bacterium in sludge.Meanwhile the method for the invention makes drying process obtain scale with reference to the use of the equipment.
Description
Technical field
The present invention relates to a kind of sludge disposal technology, specifically a kind of municipal sludge efficient energy-saving quick biological drying skill
Art.
Background technology
Sludge is caused material in sewage disposal process, it be based on microorganism, it is while dirty including being mixed into life
The solid particle such as water or silt in industrial and mineral waste water, fiber, plant and animal residues and its organic matter, metal, germ, the worm's ovum of absorption
Deng the synthesis of material, its key property is content of organics height, and particle is thinner, and moisture content is high, and dehydration is difficult.Contain in sludge
The various trace elements and energy improved soil knot of nitrogen, phosphorus, potassium and maintenance plant normal growth development needed for growth and development of plants
The organic matter of structure, there is the potential advantage of certain value as Fertilizer application after Composting treatment.Also contain cause of disease simultaneously
Microorganism, parasite（Ovum）, heavy metal and some difficult degradations organic poison.The component of sludge is with sewage source, sewage disposal
Factory's handling process and season are different and change, and the composition of sludge differs greatly.The sludge ejected from sewage treatment plant typically by
Loose material composition, moisture content is higher, and mud volume is up to the decades of times of its contained solid volume, and volume is very huge, property
Matter is very unstable, easily degenerates, and is unfavorable for transporting and disposes, therefore need to carry out minimizing and harmless treatment in time, makes containing ill
Pathogenic microorganism, the corruption amount of material for giving out stench reduce and make its degraded.
At present, scale urban sewage sludge compost processing key technology needs to be broken through, and lacks and is adapted to saving, being low for China's national situation
Consumption, efficient scale urban sewage sludge compost Integration ofTechnology.The country is in the research specifically for urban sewage sludge compost technical elements
It is short of very much, the sludge quick biological drying technology particularly on industrialization level.The correlative study of laboratory level is difficult to
Applied in large-scale production.There is an urgent need to carry out production, teaching ＆ research connection to urban sewage sludge compost processing key technology in scale level
Close tackling key problem.For China's national situation, the sludge composting Integration ofTechnology on industrialization level is completed.
The content of the invention
To solve deficiency of the prior art, the present invention provides a kind of municipal sludge efficient energy-saving quick biological drying side
Method, to reach quick desiccation, harmful pathogeny bacterium is thoroughly killed, while reach and save energy purpose.
A kind of municipal sludge efficient energy-saving quick biological drying method, comprises the following steps：
1）The culture of high-temperature strain；
2）Centrifugal dewatering of sludge；
3）Dehydrated sludge admixes high-temperature strain, fermentation, aeration-drying.
The culture of the high-temperature strain, major ingredient is the one or more in straw chaff, corn cob bran or analysis for soybean powder, according to weight
Amount part is calculated as more than 95-98 parts, auxiliary material is general calcium, wheat bran, urea, starch, glucose, sucrose, peptone, biphosphate
Potassium and magnesium sulfate, the auxiliary material calculate as 2-5 parts by weight, the major ingredient and auxiliary material and for 100 parts.
The breeding condition of the high-temperature strain is：Moisture content is in 50-60%, gravity-flow ventilation, and temperature is not higher than 37 DEG C, by 30
Its time forms yellow or ecru strain carrier, and it is 1 month to cultivate the time, and the finished product strain pack normal temperature after cultivation preserves.
The centrifugal dehydration makes sludge water content content be not higher than 80%.
The sludge admixes high-temperature strain, and the strain amount of admixing is the 1/1000 of heap body total amount.
During the aeration-drying, the aeration structure used is:
A kind of aeration structure, including air blower 1, ventilation slot 2, ventilation supervisor 3 and secondary ventilation duct 4, two ventilation slots 2
It is arranged in parallel, more ventilation ducts 4 is arranged at intervals with ventilation slot 2, the secondary ventilation duct 4 passes through supervisor 3 and the air blower 1 of divulging information
It is connected, byatt plate is covered on the ventilation slot.
Preferably, two adjacent in ventilation slot 2 ventilation ducts 4 are connected by the supervisor 3 that divulges information with same air blower 1,
Connected between adjacent ventilation slot 2 by link slot 5, be provided with connecting tube 6 in the link slot 5, it is time logical in two ventilation slots 2
Connected between airduct 4 by connecting tube 6.
Preferably, the secondary ventilation duct 4 connects two branch pipes by three-way connection, and the branch pipe is extended under heap body 7, props up
Pipe both sides are equipped with air outlet, and branch pipe is partially covered with horizontal plank under heap body 7.
Preferably, the air blower is connected with frequency conversion equipment.
Preferably, the branch pipe both sides 2cm sets an air outlet, each bore dia 3mm.
Beneficial effect
The method of the invention, using microorganism by the quick desiccation of municipal sludge, accelerate desiccation process, save the energy.55
DEG C megathermal period maintains 20 days, and 65 DEG C of megathermal periods maintain 13 days, is advantageous to thoroughly kill harmful pathogeny bacterium in sludge.Together
When, the method for the invention makes drying process obtain scale with reference to the use of the equipment.
Brief description of the drawings
Fig. 1 aeration structure schematic diagrames of the present invention；
Fig. 2 sludge water-cut variation curves are shown in figure.
Embodiment
A kind of method of the quick desiccation of municipal sludge efficient energy-saving, comprises the following steps：
1）The culture of high-temperature strain；
2）Centrifugal dewatering of sludge；
3）Dehydrated sludge admixes high-temperature strain, aeration-drying.
The culture of the high-temperature strain, major ingredient is the one or more in straw chaff, corn cob bran or analysis for soybean powder, according to weight
Amount part is calculated as more than 95-98 parts, auxiliary material is general calcium, wheat bran, urea, starch, glucose, sucrose, peptone, biphosphate
Potassium and magnesium sulfate, the auxiliary material calculate as 2-5 parts by weight, the major ingredient and auxiliary material and for 100 parts.
The breeding condition of the high-temperature strain is：Moisture content is in 50-60%, gravity-flow ventilation, and temperature is not higher than 37 DEG C, by 30
Its time forms yellow or ecru strain carrier, and it is 1 month to cultivate the time, and the finished product strain pack normal temperature after cultivation preserves.
Bacillus is the strain that known discovery most possesses multifrequency nature and multiple functions, and its characteristic is mainly manifested in：
Breeding is quick, and metabolism and breeding are fast, breeds 100,000 times within 4 hours, standard bacteria can only breed 6 times in 4 hours；Vitality is strong, without wet shape
State can be low temperature resistant -60 DEG C, 280 DEG C of high temperature resistant, resistance to strong acid, resistance to highly basic, antibiotic and sterilizing, resistance to hyperoxia（Thermophilic oxygen breeding）, lower oxygen concentration resistance（Detest
Oxygen is bred）；Volume is big, and bigger than general pathogeny bacterium molecule 4 times, take up space advantage, suppresses the growth and breeding of harmful bacteria.In work(
Energy aspect, bacillus moisture retention is strong, forms the extremely excellent poly- Vetsin of natural material of intensity, is the diaphragm of soil, prevents
Only fertile part and moisture loss；Organic matter decomposition power is strong, while propagation, can disengage the amylase of high activity, hardly possible is decomposed
Macromolecular substances resolve into available small-molecule substance, produce abundant metabolism product, synthesize a variety of organic acids, enzyme, life
Manage material and other a variety of nutrients being easily utilized such as activity；It is simultaneously antibacterial, harmful power of going out is strong, have and take up space advantage, suppression
The growth and breeding of the harmful microbes such as harmful bacteria processed, pathogen.Deodorization functions are finally also equipped with, generation effluvium can be decomposed
The organic substance of body, organic sulfur compound, organic nitrogen etc., substantially improve the environment in place.
Therefore, the detection of bacillus is carried out to the obtained high-temperature strain, testing result is that living bacteria count is
Hundred million/g of 6.9*10-3, the Bacillus is mainly by containing saccharomycete, bacillus（2 kinds）, filamentous fungi（Mould）Put with high temperature resistant
5 kinds of main bacteria seed compositions of line bacterium.
During the fermentation, temperature is more than 60 DEG C under the conditions of stuffy, and 62 DEG C of highest, temperature is more than 70 under ventilation condition
DEG C, for highest more than 75 DEG C, this is advantageous to quick biological drying process.
The centrifugal dehydration makes sludge water content content be not higher than 80%.
The sludge admixes high-temperature strain, and the strain amount of admixing is the 1/1000 of heap body total amount.
During the aeration-drying, the aeration structure used is:
A kind of aeration structure, including air blower（1）, ventilation slot（2）, ventilation supervisor（3）With secondary ventilation duct（4）, described two
Bar ventilation slot（2）It is arranged in parallel, ventilation slot（2）In be arranged at intervals with more time ventilation ducts（4）, the secondary ventilation duct（4）Pass through
Ventilation supervisor（3）With air blower（1）It is connected, byatt plate is covered on the ventilation slot；Ventilation slot（2）In adjacent twice it is logical
Airduct（4）It is responsible for by divulging information（3）With same air blower（1）It is connected, adjacent ventilation slot（2）Between pass through link slot（5）Even
It is logical, the link slot（5）In be provided with connecting tube（6）, two ventilation slots（2）In secondary ventilation duct（4）Between pass through connecting tube
（6）Connection；The secondary ventilation duct（4）Two branch pipes are connected by three-way connection, the branch pipe is extended under heap body, branch pipe both sides
Air outlet is equipped with, branch pipe is partially covered with horizontal plank under heap body.
Specific experiment.Experiment sludge is derived from the dewatered sludge of Guangzhou dan well sewage treatment plant, and the factory is located at Baiyun District stone
Jing Zhen, using AAO active sludge treatment processes, the daily 100,000 tons of sewage for the treatment of scale, excess sludge after centrifugal dehydration daily
Moisture content 75-80% 50 tons of dewatered sludge is produced, is divided into 6 heap bodies, the physicochemical property of mud sample is shown in Table 1,6 heap body groups
Into being shown in Table 2.
Table 1 tests the physicochemical property of mud sample
26 testing programs of table
As shown in figure 1, two ventilation slots 2 are dug to original hardened ground in selection area, between the ventilation slot 2 is formed
2 air pipelines away from the long 40m of wide 1m, ventilation slot 2 groove width 10cm, the deep 12cm, setting diameter 8cm secondary ventilation duct in it
4；The secondary ventilation duct 43 is connected by the supervisor that divulges information with air blower 1, covering byatt plate on the ventilation slot, horizontal plank and
Gap between ventilation slot be present；Adjacent twice ventilation ducts 4 pass through supervisor 3 and the same phase of air blower 1 of divulging information in ventilation slot 2
Even, connected by link slot 5 between adjacent ventilation slot 2, be provided with connecting tube 6 in the link slot 5, in two ventilation slots 2
Connected between secondary ventilation duct 4 by connecting tube 6；The secondary ventilation duct 4 connects two branch pipes by three-way connection, and the branch pipe prolongs
Extend under heap body, branch pipe both sides are equipped with air outlet, and branch pipe is partially covered with horizontal plank under heap body, and flowing gas is from wood
Blown out in the gap of plate.Ventilating system configures 1 frequency converter, 3 air blowers.To meet the pressure needs of sludge body, selection
Every blower power 3kw, its maximum suction blast 280mbar, maximum pressure at expulsion 280mbar, Maximum Ventilatory Volume are
265m3/hr, therefore the Maximum Ventilatory Volume of compost body is 0.265m3/m3•min.According to《Sludge from wastewater treatment plant inspection party
Method》（People's Republic of China's city-building professional standard, CJ/T221-2005) standard method execution.
Testing index, measure frequency, sampling and assay method are specific as follows：
11 points of every morning takes the sample at heap surface layer 10cm, the experimental determination moisture in composting plant, and method uses
Oven-dry weight method.
Conclusion：Good water content promotes microbial growth in heap body with ventilation, organic matter decomposes, a huge sum of money
Category passivation.On the one hand the change of heap moisture in vivo produces increase moisture content by the biological metabolism of microorganism, on the other hand by aerobic
Compost is divulged information and high temperature is scattered and disappeared with vapor form；The collective effect of these two aspects result in the change of heap body moisture content.Sludge
Compost water-cut variation curve is shown in Fig. 2.
From Fig. 2 sludge composting water-cut variation curves, compost heap body build into when, the moisture content of each heap body all exists
Between 60%-65%, heap body now moisture content highest；With the process of compost, the moisture content of heap body gradually reduced, at the 11st day
When, 5# and 6# heap body moisture content is reduced to less than 40%, and at the 30th day, heap body 1#, 2#, 3#, 4#, 5#, 6# were reduced to
55%、51%、44%、31%、28%、30%.Heap body 5#, 6# moisture content reduction speed are fast, and compost effect is preferable, and it is quick to realize material
Desiccation, be advantageous to accelerate aerobic compost process, material quick composting.
To sum up, the method for the invention realizes the quick desiccation of material, saves the energy.55 DEG C of megathermal periods maintain 20 days,
65 DEG C of megathermal periods maintain 13 days, are advantageous to thoroughly kill harmful pathogeny bacterium in sludge.Meanwhile the method for the invention combines
The use of the aeration structure makes drying process obtain scale.
Claims (1)
1. a kind of method of the quick desiccation of municipal sludge efficient energy-saving, comprises the following steps：
1) culture of high-temperature strain；2) centrifugal dewatering of sludge；3) dehydrated sludge admixes high-temperature strain, fermentation, aeration-drying, its
It is characterised by：The culture of the step 1) high-temperature strain, major ingredient are one kind or several in straw chaff, corn cob bran or analysis for soybean powder
Kind, it is 95-98 parts to calculate in parts by weight, and auxiliary material is general calcium, wheat bran, urea, starch, glucose, sucrose, peptone, phosphoric acid
Potassium dihydrogen and magnesium sulfate, the auxiliary material calculate as 2-5 parts by weight, the major ingredient and auxiliary material and for 100 parts；The step
1) breeding condition of high-temperature strain is：Moisture content is maintained at 50-60% during culture, and gravity-flow ventilation, temperature is not higher than 37 DEG C, by 30
Its time forms yellow or ecru strain carrier, and it is 1 month to cultivate the time, and the finished product strain pack normal temperature after cultivation preserves；
Step 2) the centrifugal dehydration makes sludge water content content be not higher than 80%；In step 3), the sludge admixes high-temperature strain, strain
The amount of admixing is the 1/1000 of heap body total amount.
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| JPS60232086A (en) * | 1984-05-01 | 1985-11-18 | Yasuyuki Hayano | Method for deodorizing and drying organic waste |
| CN101134687B (en) * | 2007-07-18 | 2010-12-22 | 刘永定 | Ground pit type high-heat aerobic organisms fermentation odour remover and method for degradation of organic effluvial waste dump fertilizer |
| CN101333510B (en) * | 2008-08-05 | 2011-05-18 | 海南农丰宝肥料有限公司 | Method for processing sludge and preparing bio organic fertilizer and special leaven thereof |
| CN102153388B (en) * | 2010-12-03 | 2013-07-31 | 深圳市如茵生态环境建设有限公司 | Circulating sludge biological fermentation tank, processing system and processing method |
| CN102381822A (en) * | 2011-07-18 | 2012-03-21 | 刘建伦 | Multi-strain compound microbial high-temperature rapid-digestion sludge harmless treatment method |
| CN102372404B (en) * | 2011-09-28 | 2013-07-31 | 浙江省环境保护科学设计研究院 | Bio-augmentation treatment sludge in-situ reduction method |
| CN102786200B (en) * | 2012-08-29 | 2013-12-11 | 天津科技大学 | Biological sludge drying method |
| CN103043880A (en) * | 2012-12-18 | 2013-04-17 | 陕西宣和通科技发展有限责任公司 | Biological drying method for sludge |
| CN103910476B (en) * | 2014-03-25 | 2015-11-04 | 山东省科学院能源研究所 | Based on the municipal dewatered sludge of NaOH pretreatment without the biological dewatered method of auxiliary material |
| CN104529112B (en) * | 2014-11-28 | 2019-09-03 | 中央民族大学 | Sludge organism drying method for treating |
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