CN108191183A - The minimizing technology of heavy metals in city sewage sludge - Google Patents
The minimizing technology of heavy metals in city sewage sludge Download PDFInfo
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- CN108191183A CN108191183A CN201810063843.4A CN201810063843A CN108191183A CN 108191183 A CN108191183 A CN 108191183A CN 201810063843 A CN201810063843 A CN 201810063843A CN 108191183 A CN108191183 A CN 108191183A
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- municipal sludge
- sludge
- bioleaching
- minimizing technology
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- 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
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- 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
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- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
Municipal sludge is first carried out ultrasonic pretreatment by the minimizing technology of heavy metals in city sewage sludge provided by the invention, ultrasonic pretreatment can destroy the structure of sludge, improve the dewatering of sludge, simultaneously, it is combined by ultrasonic pretreatment with bioleaching, the heavy metal in municipal sludge has been effectively removed, and has effectively removed the total coli group in municipal sludge and excrement colibacillus group.In addition, minimizing technology provided by the invention is more excellent to the dehydrating effect of municipal sludge, the bioleaching time is short.By further limiting the type of inoculation bacterium as Thiobacillus ferrooxidans and Thiobacillus thioxidans, when carrying out bioleaching, both autotrophic type microorganisms can directly be oxidation of the sulfide into soluble sulfate and leach heavy metal, while can also dissolve heavy metal by the mesostate of bacterial oxidation.Thus, there is apparent facilitation for heavy metal, total coli group and the excrement colibacillus group in removal municipal sludge, the dehydrating effect of sludge is also improved.
Description
Technical field
The present invention relates to going for environmental protection and comprehensive utilization of resources field more particularly to a kind of heavy metals in city sewage sludge
Except method.
Background technology
As various countries are to the pay attention to day by day of waste water control and constantly newly-built, the yield of sludge of municipal sewage plant
Constantly increase.It was predicted that rate is effectively treated according to sewage to calculate, the sludge yield of the year two thousand twenty is up to more than 8,000 ten thousand tons.City
City's sludge is the sediment formed in sewage disposal process, have high-moisture percentage, high content of organics, high content of beary metal and
The features such as pernicious bacteria is more will cause significant damage if do not dealt carefully with to ecological environment.
Bioleaching technology can realize the removing of sludge heavy-metal, and not lose the content of sludge organic matter, thus,
Bioleaching technology is to remove the effective way of sludge heavy-metal, is with a wide range of applications.However, the bioleaching period
It is long, it is low to the drip leaching efficiency of heavy metal.Therefore, the bioleaching efficiency for how improving heavy metal has become and grinds both at home and abroad at present
The hot spot studied carefully.
Invention content
In view of this, the technical problem to be solved in the present invention is to provide a kind of removal side of heavy metals in city sewage sludge
Method, this minimizing technology are more excellent to the removal effect of heavy metal, meanwhile, to total coli group in municipal sludge and excrement colibacillus group
Removal effect it is more excellent.
The present invention provides a kind of minimizing technology of heavy metals in city sewage sludge, including：
A ultrasonic pretreatment) is carried out to municipal sludge, obtains pretreated municipal sludge；
B) inoculation bacterium is inoculated into pretreated municipal sludge, the municipal sludge after being inoculated with；
C the municipal sludge after the inoculation) is subjected to bioleaching, the municipal sludge for the heavy metal that is removed.
Preferably, the supersonic frequency of the ultrasonic pretreatment is 21~28kHz, and the acoustic energy of the ultrasonic pretreatment is close
It spends for 0.02~0.03W/mL, the ultrasonic time of the ultrasonic pretreatment is 5~10s.
Preferably, step A) in, after the ultrasonic pretreatment, further include in the municipal sludge after ultrasonic pretreatment
Add Fe2+And S0；
The Fe2+Additive amount be 1~2g/L, the S0Additive amount be 1.2~2.4g/L.
Preferably, the inoculation bacterium is Thiobacillus ferrooxidans and Thiobacillus thioxidans.
Preferably, step B) in, the inoculation bacterium further includes culture inoculation bacterium in liquid medium before inoculation, obtains
Inoculation bacterium after to culture；
The somatic cells number of each inoculation bacterium after culture is 107~108A/mL.
Preferably, the temperature of the culture inoculation bacterium is 28~30 DEG C.
Preferably, the inoculation bacterium after the culture accounts for 6~10wt% of the pretreated municipal sludge.
Preferably, the temperature of the bioleaching is 28~30 DEG C, and the aeration quantity of the bioleaching is 1.2~1.5m3/
H, the time of the bioleaching is 24~30h.
Preferably, it during the bioleaching, further includes：The moisture of weight method supplement evaporation is taken every 12h, is protected
Hold a concentration of 25~30g/L of the municipal sludge after inoculation.
Preferably, it after the bioleaching, further includes and the municipal sludge after the bioleaching is subjected to press filtration；
The pressure of the press filtration is 4~5MPa, and the time of the press filtration is 1~1.5h.
The present invention provides a kind of minimizing technology of heavy metals in city sewage sludge, including：
A ultrasonic pretreatment) is carried out to municipal sludge, obtains pretreated municipal sludge；
B) inoculation bacterium is inoculated into pretreated municipal sludge, the municipal sludge after being inoculated with；
C the municipal sludge after the inoculation) is subjected to bioleaching, the municipal sludge for the heavy metal that is removed.
Municipal sludge is first carried out ultrasonic pretreatment by minimizing technology provided by the invention, and ultrasonic pretreatment can destroy dirt
The structure of mud improves the dewatering of sludge, meanwhile, by the combination of ultrasonic pretreatment and bioleaching, can effectively go
Except the heavy metal in municipal sludge, and it is more excellent to the removal effect of total coli group in municipal sludge and excrement colibacillus group.In addition,
Minimizing technology provided by the invention is more excellent to the dehydrating effect of municipal sludge, and the bioleaching time is short.It is of the invention further to limit
The type for being inoculated with bacterium is Thiobacillus ferrooxidans and Thiobacillus thioxidans, when carrying out bioleaching, the micro- life of both autotrophic types
Object can directly be oxidation of the sulfide into soluble sulfate and leach heavy metal, while can also pass through bacterial oxidation
Mesostate dissolves heavy metal.Thus, for heavy metal, total coli group and the fecal coliform in removal municipal sludge
Group has apparent facilitation, meanwhile, the dehydrating effect of sludge is also improved.
The experimental results showed that minimizing technology provided by the invention is not less than the removal rate of heavy metals in city sewage sludge Cu
65%, 88% is not less than to the removal rate of heavy metal Zn, 53% is not less than to the removal rate of heavy metal Cr.To total in municipal sludge
The removal rate of coliform (TC) and excrement colibacillus group (FC) can be more than 99%, even higher.The resistivity of municipal sludge reduces
To 0.39 × 1013, it is even lower, the dewatering of sludge is greatly improved, moisture percentage in sewage sludge is reduced to less than 50% after press filtration.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Those of ordinary skill in the art's all other embodiments obtained without making creative work, belong to this hair
The range of bright protection.
The present invention provides a kind of minimizing technology of heavy metals in city sewage sludge, including：
A ultrasonic pretreatment) is carried out to municipal sludge, obtains pretreated municipal sludge；
B) inoculation bacterium is inoculated into pretreated municipal sludge, the municipal sludge after being inoculated with；
C the municipal sludge after the inoculation) is subjected to bioleaching, the municipal sludge for the heavy metal that is removed.
Municipal sludge is first carried out ultrasonic pretreatment by the present invention, obtains pretreated municipal sludge.Ultrasonic wave is located in advance
Reason can destroy the structure of sludge, improve the dewatering of sludge, meanwhile, by the combination of ultrasonic pretreatment and bioleaching,
The heavy metal in municipal sludge can be effectively removed, and to the removal effect of total coli group in municipal sludge and excrement colibacillus group
It is more excellent.In addition, minimizing technology provided by the invention is more excellent to the dehydrating effect of municipal sludge, the bioleaching time is short.
The supersonic frequency of the ultrasonic pretreatment is preferably 21~28kHz.In certain embodiments of the present invention, it is described
The supersonic frequency of ultrasonic pretreatment is 21kHz or 28kHz.The acoustic density of the ultrasonic pretreatment is preferably 0.02~
0.03W/mL.In certain embodiments of the present invention, the acoustic density of the ultrasonic pretreatment is 0.02W/mL or 0.03W/
mL.The ultrasonic time of the ultrasonic pretreatment is preferably 5~10s.In certain embodiments of the present invention, the ultrasonic wave is pre-
The ultrasonic time of processing is 5s or 10s.
After the ultrasonic pretreatment, preferably further include in the municipal sludge after ultrasonic pretreatment and add nutriment
Fe2+And S0.The Fe2+Additive amount be preferably 1~2g/L, the S0Additive amount be preferably 1.2~2.4g/L.In the application
Some embodiments in, the Fe2+Additive amount be 1g/L or 2g/L, the S0Additive amount be 1.2g/L or 2.4g/L.
After obtaining pretreated municipal sludge, inoculation bacterium is inoculated into pretreated municipal sludge, is inoculated with
Municipal sludge afterwards.
In the present invention, the inoculation bacterium is preferably Thiobacillus ferrooxidans and Thiobacillus thioxidans.It is of the invention further
The type of inoculation bacterium is limited as Thiobacillus ferrooxidans and Thiobacillus thioxidans, when carrying out subsequent bioleaching, both
Autotrophic type microorganism can directly be oxidation of the sulfide into soluble sulfate and leach heavy metal, while can also pass through
The mesostate of bacterial oxidation dissolves heavy metal.Thus, for heavy metal, the total coli group in removal municipal sludge
There is apparent facilitation with excrement colibacillus group, meanwhile, the dehydrating effect of sludge is also improved.
The present invention has no special limitation to the source of the inoculation bacterium, can make by oneself, or general commercially available.This hair
It is bright that Thiobacillus ferrooxidans and Thiobacillus thioxidans are preferably isolated from the sludge of domestication, and be sequenced and identify through 16sRNA, it obtains
Obtain Thiobacillus ferrooxidans and Thiobacillus thioxidans.
The inoculation bacterium preferably further includes culture inoculation bacterium, the inoculation bacterium after being cultivated before inoculation.The inoculation
Bacterium is preferably cultivated in liquid medium.It is furthermore preferred that it is specially：The Thiobacillus ferrooxidans is inoculated in SM liquid
It is cultivated in culture medium, the Thiobacillus thioxidans is inoculated in modified 9K culture mediums and is cultivated.After the culture
Each inoculation bacterium somatic cells number be preferably 107~108A/mL.It is furthermore preferred that it is specially：Ferrous oxide sulphur after culture
The somatic cells number of bacillus is 107~108A/mL；The somatic cells number of Thiobacillus thioxidans after culture is 107~108A/
mL。
The temperature of the culture is preferably 28~30 DEG C.In certain embodiments of the present invention, the temperature of the culture is
28 DEG C or 30 DEG C.
The culture carries out preferably in reciprocal shaker, and the sway velocity of the reciprocal shaker is preferably 180~
200r/min。
After inoculation bacterium after being cultivated, the inoculation bacterium after the culture is inoculated into pretreated municipal sludge,
Municipal sludge after being inoculated with.
In the present invention, the inoculation bacterium after the culture preferably accounts for 6~10wt% of the pretreated municipal sludge.
In certain embodiments of the present invention, the inoculation bacterium after the culture account for the pretreated municipal sludge 6wt%,
8wt% or 10wt%.
After municipal sludge after being inoculated with, the municipal sludge after the inoculation is subjected to bioleaching, be removed weight
The municipal sludge of metal.
The temperature of the bioleaching is preferably 28~30 DEG C.In certain embodiments of the present invention, the bioleaching
Temperature be 28 DEG C or 30 DEG C.The aeration quantity of the bioleaching is preferably 1.2~1.5m3/h.In certain implementations of the present invention
In example, the aeration quantity of the bioleaching is 1.2m3/ h or 1.5m3/h.The time of the bioleaching is preferably 24~30h.
In certain embodiments of the present invention, time of the bioleaching is for 24 hours or 30h.
During the bioleaching, preferably further include：The moisture of weight method supplement evaporation is taken every 12h, is kept
A concentration of 25~30g/L of municipal sludge after inoculation.
After the bioleaching, preferably further include and the municipal sludge after the bioleaching is subjected to press filtration.In the present invention
In, the pressure of the press filtration is preferably 4~5MPa.In certain embodiments of the present invention, the pressure of the press filtration for 4MPa or
5MPa.The time of the press filtration is preferably 1~1.5h.In certain embodiments of the present invention, the time of the press filtration for 1h or
1.5h。
The present invention provides a kind of minimizing technology of heavy metals in city sewage sludge, including：
A ultrasonic pretreatment) is carried out to municipal sludge, obtains pretreated municipal sludge；
B) inoculation bacterium is inoculated into pretreated municipal sludge, the municipal sludge after being inoculated with；
C the municipal sludge after the inoculation) is subjected to bioleaching, the municipal sludge for the heavy metal that is removed.
Municipal sludge is first carried out ultrasonic pretreatment by minimizing technology provided by the invention, and ultrasonic pretreatment can destroy dirt
The structure of mud improves the dewatering of sludge, meanwhile, by the combination of ultrasonic pretreatment and bioleaching, can effectively go
Except the heavy metal in municipal sludge, and it is more excellent to the removal effect of total coli group in municipal sludge and excrement colibacillus group.In addition,
Minimizing technology provided by the invention is more excellent to the dehydrating effect of municipal sludge, and the bioleaching time is short.It is of the invention further to limit
The type for being inoculated with bacterium is Thiobacillus ferrooxidans and Thiobacillus thioxidans, when carrying out bioleaching, the micro- life of both autotrophic types
Object can directly be oxidation of the sulfide into soluble sulfate and leach heavy metal, while can also pass through bacterial oxidation
Mesostate dissolves heavy metal.Thus, for heavy metal, total coli group and the fecal coliform in removal municipal sludge
Group has apparent facilitation, meanwhile, the dehydrating effect of sludge is also improved.
The experimental results showed that minimizing technology provided by the invention is not less than the removal rate of heavy metals in city sewage sludge Cu
65%, 88% is not less than to the removal rate of heavy metal Zn, 53% is not less than to the removal rate of heavy metal Cr.To total in municipal sludge
The removal rate of coliform (TC) and excrement colibacillus group (FC) can be more than 99%, even higher.The resistivity of municipal sludge reduces
To 0.39 × 1013, it is even lower, the dewatering of sludge is greatly improved, moisture percentage in sewage sludge is reduced to less than 50% after press filtration.
In order to further illustrate the present invention, with reference to embodiment to a kind of heavy metals in city sewage sludge provided by the invention
Minimizing technology be described in detail, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Ultrasonic pretreatment, the supersonic frequency 28kHz of the ultrasonic pretreatment, acoustic density are carried out to municipal sludge
0.02W/mL, ultrasonic time 10s.Nutriment Fe is added into the municipal sludge after ultrasonic pretreatment2+And S0, Fe2+Add
Dosage is 1g/L, S0Additive amount for 1.2g/L, obtain pretreated municipal sludge.
Thiobacillus ferrooxidans and Thiobacillus thioxidans are isolated from the sludge of domestication, and is identified through 16sRNA sequencings
To Thiobacillus ferrooxidans and Thiobacillus thioxidans, the Thiobacillus ferrooxidans is inoculated in SM fluid nutrient mediums, by institute
It states Thiobacillus thioxidans to be inoculated in modified 9K culture mediums, and both culture mediums is placed in reciprocal shaker culture, it is described
The temperature of culture is 28 DEG C, until a concentration of the 10 of each cell thalline7A/mL.
Thiobacillus ferrooxidans after the culture and the Thiobacillus thioxidans after culture are inoculated into pretreated city
In city's sludge, the Thiobacillus thioxidans after Thiobacillus ferrooxidans and culture after culture accounts for the pretreated municipal sludge
6wt%, the municipal sludge after being inoculated with.
Municipal sludge after the inoculation is subjected to bioleaching, the temperature of the bioleaching is 28 DEG C, aeration quantity is
1.2m3/ h, time 30h, obtain the municipal sludge after bioleaching.Meanwhile take the water of weight method supplement evaporation every 12h
Point, a concentration of 25~30g/L of the municipal sludge after holding inoculation.
Performance detection is carried out to the municipal sludge after bioleaching, the results showed that, the minimizing technology of embodiment 1 is to city dirt
The removal rate of heavy metal Cu is 65% in mud, and the removal rate to heavy metal Zn is 90%, and the removal rate to heavy metal Cr is 55%.
Removal rate to total coli group in municipal sludge (TC) and excrement colibacillus group (FC) is 99.3%.The resistivity of municipal sludge reduces
To 0.39 × 1013, greatly improve the dewatering of sludge.By the municipal sludge after bioleaching under 4MPa press filtration 1.5h,
The moisture content of municipal sludge is reduced to 49%.
Embodiment 2
Ultrasonic pretreatment, the supersonic frequency 21kHz of the ultrasonic pretreatment, acoustic density are carried out to municipal sludge
0.03W/mL, ultrasonic time 5s.Nutriment Fe is added into the municipal sludge after ultrasonic pretreatment2+And S0, Fe2+Addition
It measures as 2g/L, S0Additive amount for 1.2g/L, obtain pretreated municipal sludge.
Thiobacillus ferrooxidans and Thiobacillus thioxidans are isolated from the sludge of domestication, and is identified through 16sRNA sequencings
To Thiobacillus ferrooxidans and Thiobacillus thioxidans, the Thiobacillus ferrooxidans is inoculated in SM fluid nutrient mediums, by institute
It states Thiobacillus thioxidans to be inoculated in modified 9K culture mediums, and both culture mediums is placed in reciprocal shaker culture, it is described
The temperature of culture is 30 DEG C, until a concentration of the 10 of each cell thalline8A/mL.
Thiobacillus ferrooxidans after the culture and the Thiobacillus thioxidans after culture are inoculated into pretreated city
In city's sludge, the Thiobacillus thioxidans after Thiobacillus ferrooxidans and culture after culture accounts for the pretreated municipal sludge
8wt%, the municipal sludge after being inoculated with.
Municipal sludge after the inoculation is subjected to bioleaching, the temperature of the bioleaching is 30 DEG C, aeration quantity is
1.2m3/ h, time 28h, obtain the municipal sludge after bioleaching.Meanwhile take the water of weight method supplement evaporation every 12h
Point, a concentration of 25~30g/L of the municipal sludge after holding inoculation.
Performance detection is carried out to the municipal sludge after bioleaching, the results showed that, the minimizing technology of embodiment 1 is to city dirt
The removal rate of heavy metal Cu is 68% in mud, and the removal rate to heavy metal Zn is 88%, and the removal rate to heavy metal Cr is 53%.
Removal rate to total coli group in municipal sludge (TC) and excrement colibacillus group (FC) is 99.4%.The resistivity of municipal sludge reduces
To 0.31 × 1013, greatly improve the dewatering of sludge.By the municipal sludge after bioleaching under 5MPa press filtration 1h, city
The moisture content of city's sludge is reduced to 53%.
Embodiment 3
Ultrasonic pretreatment, the supersonic frequency 28kHz of the ultrasonic pretreatment, acoustic density are carried out to municipal sludge
0.03W/mL, ultrasonic time 10s.Nutriment Fe is added into the municipal sludge after ultrasonic pretreatment2+And S0, Fe2+Add
Dosage is 2g/L, S0Additive amount for 2.4g/L, obtain pretreated municipal sludge.
Thiobacillus ferrooxidans and Thiobacillus thioxidans are isolated from the sludge of domestication, and is identified through 16sRNA sequencings
To Thiobacillus ferrooxidans and Thiobacillus thioxidans, the Thiobacillus ferrooxidans is inoculated in SM fluid nutrient mediums, by institute
It states Thiobacillus thioxidans to be inoculated in modified 9K culture mediums, and both culture mediums is placed in reciprocal shaker culture, it is described
The temperature of culture is 28 DEG C, until a concentration of the 10 of each cell thalline8A/mL.
Thiobacillus ferrooxidans after the culture and the Thiobacillus thioxidans after culture are inoculated into pretreated city
In city's sludge, the Thiobacillus thioxidans after Thiobacillus ferrooxidans and culture after culture accounts for the pretreated municipal sludge
10wt%, the municipal sludge after being inoculated with.
Municipal sludge after the inoculation is subjected to bioleaching, the temperature of the bioleaching is 28 DEG C, aeration quantity is
1.5m3/ h, time is for 24 hours, obtain the municipal sludge after bioleaching.Meanwhile take the water of weight method supplement evaporation every 12h
Point, a concentration of 25~30g/L of the municipal sludge after holding inoculation.
Performance detection is carried out to the municipal sludge after bioleaching, the results showed that, the minimizing technology of embodiment 1 is to city dirt
The removal rate of heavy metal Cu is 70% in mud, and the removal rate to heavy metal Zn is 90%, and the removal rate to heavy metal Cr is 55%.
Removal rate to total coli group in municipal sludge (TC) and excrement colibacillus group (FC) is 99.2%.The resistivity of municipal sludge reduces
To 0.27 × 1013, greatly improve the dewatering of sludge.By the municipal sludge after bioleaching under 5MPa press filtration 1.5h,
The moisture content of municipal sludge is reduced to 50%.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (10)
1. a kind of minimizing technology of heavy metals in city sewage sludge, including：
A ultrasonic pretreatment) is carried out to municipal sludge, obtains pretreated municipal sludge；
B) inoculation bacterium is inoculated into pretreated municipal sludge, the municipal sludge after being inoculated with；
C the municipal sludge after the inoculation) is subjected to bioleaching, the municipal sludge for the heavy metal that is removed.
2. minimizing technology according to claim 1, which is characterized in that the supersonic frequency of the ultrasonic pretreatment for 21~
28kHz, the acoustic density of the ultrasonic pretreatment is 0.02~0.03W/mL, and the ultrasonic time of the ultrasonic pretreatment is
5~10s.
3. minimizing technology according to claim 1, which is characterized in that step A) in, after the ultrasonic pretreatment, also wrap
It includes in the municipal sludge after ultrasonic pretreatment and adds Fe2+And S0；
The Fe2+Additive amount be 1~2g/L, the S0Additive amount be 1.2~2.4g/L.
4. minimizing technology according to claim 1, which is characterized in that the inoculation bacterium is Thiobacillus ferrooxidans and oxidation
Sulphur Thiobacillus.
5. minimizing technology according to claim 1, which is characterized in that step B) in, the inoculation bacterium is gone back before inoculation
Including cultivating inoculation bacterium, the inoculation bacterium after being cultivated in liquid medium；
The somatic cells number of each inoculation bacterium after culture is 107~108A/mL.
6. minimizing technology according to claim 5, which is characterized in that the temperature of the culture inoculation bacterium is 28~30 DEG C.
7. minimizing technology according to claim 5, which is characterized in that after the inoculation bacterium after the culture accounts for the pretreatment
Municipal sludge 6~10wt%.
8. minimizing technology according to claim 1, which is characterized in that the temperature of the bioleaching is 28~30 DEG C, institute
The aeration quantity for stating bioleaching is 1.2~1.5m3/ h, the time of the bioleaching is 24~30h.
9. minimizing technology according to claim 1, which is characterized in that during the bioleaching, further include：Every
12h takes the moisture of weight method supplement evaporation, keeps a concentration of 25~30g/L of the municipal sludge after inoculation.
10. minimizing technology according to claim 1, which is characterized in that after the bioleaching, further include the biology
Municipal sludge after drip leaching carries out press filtration；
The pressure of the press filtration is 4~5MPa, and the time of the press filtration is 1~1.5h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485232A (en) * | 2018-12-12 | 2019-03-19 | 河南力诚环保科技有限公司 | A kind of medicament for deeply dehydrating sludge, method and device |
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