CN109704838A - A kind of municipal sludge trough type fermentation technique - Google Patents
A kind of municipal sludge trough type fermentation technique Download PDFInfo
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- CN109704838A CN109704838A CN201910132151.5A CN201910132151A CN109704838A CN 109704838 A CN109704838 A CN 109704838A CN 201910132151 A CN201910132151 A CN 201910132151A CN 109704838 A CN109704838 A CN 109704838A
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Abstract
The invention discloses a kind of municipal sludge trough type fermentation techniques, including precipitating impurity elimination, raw material mixing, first anaerobic fermentation, an aerobic fermentation, secondary aerobic fermentation, the big step of granulating and drying six；The present invention first passes through anaerobic fermentation, inhibit even to kill pathogen and helminth in sludge, then pass through the aerobic fermentation under the conditions of different temperatures twice, different amount of oxygen again, it is different according to the habit of different aerobic fermentation microbial inoculums, changing fermentation condition can be by the maximum utilization of the activity of aerobic fermentation bacterium, reduce zymogenic usage amount, the elements such as N, P of fertilizer are supplemented additionally by the excrement of the poultry or livestock of addition and urea of subsequent addition etc., so that the Fertilizer nutrient ingredient of preparation is higher.
Description
Technical field
The present invention relates to municipal sludge processing technology fields, and in particular to a kind of municipal sludge trough type fermentation technique.
Background technique
Byproduct of the municipal sludge as sewage treatment is one kind by organic debris, microorganism, colloid, various micro- lifes
The heterogeneous body of object and organic and inorganic particle composition.Since largely accumulative sludge garbage has not only occupied vast soil
Ground, and harmful components therein such as pathogen, helminth and organic pollutant are big as influence urban environmental hygiene one
Public hazards.But it is necessary rich in the plant growths such as certain organic matter and nitrogen, phosphorus, potassium and calcium, sulphur, iron, magnesium, boron in municipal sludge
Mineral matter element, be a kind of good fertilizer and soil conditioner.Therefore, how by municipal sludge by processing obtain it is high-quality
Soil and fertilizer be the research direction with development potentiality.
A kind of method using municipal sludge production compound organic fertilizer of the disclosure of the invention of Patent No. CN1209324C, is adopted
The polyacrylamide that tradition uses proportionally is replaced with natural dehydrating agent, is realized that half flocculates, is alleviated city sewage and sludge and wadding a quilt with cotton
The insoluble defect formed during solidifying, reduces the toxic effect and mud volume of polyacrylamide；Phosphoric acid dissolubility material is added
With heavy metal passivating material, accesses fertile soil and win power detonating agent, further soften sludge, discharge available nutrient；Most afterwards through high temperature, height
Instantaneous thermal jet extruding is pressed to be granulated, it is secondary to connect bacterium, it is compound to reach organic and inorganic-microorganism three-dimensional.City sewage and sludge is through above-mentioned side
After method processing, wherein pathogen disappears, organic humus, and heavy metal stabilizing improves, and plant can be increased using morphological nutrient
Add, C/N ratio, physical behavior, innoxious degree, solubility, nutrient balance etc. are all greatly improved.But pass through real
Border fermentation operation finds that the polyacrylamide that the organic fertilizer that the invention obtains is added has certain toxicity, and need to ferment
Microbial inoculum content is big, increases the difficulty of fermentation.Therefore, a kind of municipal sludge zymotechnique that can solve above-mentioned technical problem is invented
Being one has technical problem to be solved.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of municipal sludge trough type fermentation techniques.
(2) technical solution
The present invention is achieved by the following technical programs:
A kind of municipal sludge trough type fermentation technique, comprising the following steps:
1) precipitate impurity elimination: municipal sludge be filtered precipitating by sieve, in removal sludge the sandstone of bulky grain and
Metal sundries；
2) raw material mixes: the excrement of the poultry or livestock dried is added into filtered sludge, is then mixed, and
Guarantee mixed water content between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 0.5%-0.8% into mixed raw material,
It is put into fermentation tank after mixing, and covers sealed plastic bag in notch and ferment 3-5 days, removed until mixture peculiar smell is light；
4) aerobic fermentation: the one time fermentation bacterium for being added that weight is mixture 1.0%-1.5% except sealed plastic bag is lifted
Mixture and high-temperature aerobic actinomycete agent, are then sufficiently mixed using slot type turning machine by agent, then carry out fermentation 15-20 days,
And fermentation material is subjected to turning using slot type turning machine every 3h, while being passed through enough hot-airs, so that windrow in fermentation process
Temperature be maintained at 65-75 DEG C；
5) secondary aerobic fermentation: it is fermentation material 0.6%-1.0% that weight is added in the fermentation material after Xiang Yici aerobic fermentation
Secondary fermentation microbial inoculum, and fermentation material to be sufficiently mixed using slot type turning machine, then carries out secondary aerobic fermentation 10-15
It, and fermentation material is subjected to turning using slot type turning machine every for 24 hours, and be passed through appropriate cold air, so that heap in fermentation process
The temperature of material is kept for 40-50 DEG C；
6) granulating and drying: the material of iron, the microelements such as zinc and appropriate nitrogen, phosphorus, potassium is added into fertilizer, then by making
Grain machine carries out granulating and drying and obtains compound fertilizer.
Preferably, the excrement for the poultry or livestock being added in the step 2 is the 20%-30% of sludge weight.
Preferably, the one time fermentation microbial inoculum in the step 4 is thermophilic actinomycete (thermoactinomyces) and thermophilic
Bacillus stearothermophilus (B.stereothermophilus) mix bacterium agent.
Preferably, the temperature for the hot-air being passed through in the step 4 is 50-60 DEG C, and intake is every cubic metre of windrow 8-
10m3/h。
Preferably, the secondary fermentation microbial inoculum in the step 5 is bacillus licheniformis (Bacillus
Licheniformis), bacillus cereus (cereus), bacillus subtilis (Bacillus subtilis) mix bacterium agent.
Preferably, the temperature for the cold air being passed through in the step 5 is 20-30 DEG C, and intake is every cubic metre of windrow 2-
3m3/h。
Preferably, the nitrogen that is added in the step 6, phosphorus, potassium material mainly increased by way of pouring into urea, and add
The weight of the urea entered is the 15%-20% of fertilizer.
(3) beneficial effect
The present invention first passes through 3-5 days anaerobic fermentations, by the smelly ingredient breakdown of some corrosion, and generates a large amount of CO2,
But CO2 concentration increases the growth for being able to suppress pathogen in sludge, helminth, while the acidic materials that anaerobic fermentation generates in slot
Pathogen in sludge, helminth can even be killed；Then pass through the aerobic hair under the conditions of different temperatures twice, different amount of oxygen again
Ferment, different according to the habit of different aerobic fermentation microbial inoculums, the activity maximum of aerobic fermentation bacterium can be utilized by changing fermentation condition,
Reduce zymogenic usage amount；Additionally by the excrement of the poultry or livestock of addition and the urea etc. of subsequent addition to fertilizer
The elements such as N, P supplemented so that the Fertilizer nutrient ingredient of preparation is higher.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Embodiment 1:
A kind of municipal sludge trough type fermentation technique, comprising the following steps:
1) precipitate impurity elimination: municipal sludge be filtered precipitating by sieve, in removal sludge the sandstone of bulky grain and
Metal sundries；
2) raw material mixes: the excrement for the poultry and livestock that 250kg is dried being added into the filtered sludge of 1000kg, then
It is mixed, so that mixed water content is between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 8kg into mixed raw material, is uniformly mixed
After be put into fermentation tank, and cover sealed plastic bag in notch and ferment 4 days, until mixture peculiar smell is light removes；
4) it an aerobic fermentation: lifts except sealed plastic bag, addition weight is 10kg bacillus stearothermophilus
It (B.stereothermophilus) and 5kg thermophilic actinomycete (thermoactinomyces), then will using slot type turning machine
Mixture is sufficiently mixed with high-temperature aerobic actinomycete agent, then carries out fermentation 18 days, and will send out using slot type turning machine every 3h
Ferment material carries out turning, while with every cubic metre of windrow 9m3The intake of/h is passed through 55 DEG C of hot-air, so that heap in fermentation process
The temperature of material is maintained at 65-75 DEG C；
5) 4kg bacillus subtilis (Bacillus secondary aerobic fermentation: is added in the fermentation material after Xiang Yici aerobic fermentation
Subtilis), 4kg bacillus cereus (cereus) and 2kg bacillus licheniformis (Bacillus licheniformis), and
Fermentation material to be sufficiently mixed using slot type turning machine, then carries out secondary aerobic fermentation 12 days, and every for 24 hours utilize slot type
Fermentation material is carried out turning by turning machine, and with every cubic metre of windrow 2.5m3The intake of/h is passed through 25 DEG C of cold air, so that hair
The temperature of windrow is kept for 40-50 DEG C during ferment；
6) granulating and drying: be added into fertilizer the elements such as micro iron, zinc and and 200kg urea, then by making
Grain machine carries out granulating and drying and obtains compound fertilizer.
Embodiment 2:
1) precipitate impurity elimination: municipal sludge be filtered precipitating by sieve, in removal sludge the sandstone of bulky grain and
Metal sundries；
2) raw material mixes: the excrement for the poultry and livestock that 200kg is dried being added into the filtered sludge of 1000kg, then
It is mixed, so that mixed water content is between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 7.5kg into mixed raw material, and mixing is equal
It is put into fermentation tank after even, and covers sealed plastic bag in notch and ferment 3 days, removed until mixture peculiar smell is light；
4) it an aerobic fermentation: lifts except sealed plastic bag, addition weight is 7kg bacillus stearothermophilus
It (B.stereothermophilus) and 6kg thermophilic actinomycete (thermoactinomyces), then will using slot type turning machine
Mixture is sufficiently mixed with high-temperature aerobic actinomycete agent, then carries out fermentation 16 days, and will send out using slot type turning machine every 3h
Ferment material carries out turning, while with every cubic metre of windrow 8m3The intake of/h is passed through 60 DEG C of hot-air, so that heap in fermentation process
The temperature of material is maintained at 65-75 DEG C；
5) 3kg bacillus subtilis (Bacillus secondary aerobic fermentation: is added in the fermentation material after Xiang Yici aerobic fermentation
Subtilis), 3kg bacillus cereus (cereus) and 3kg bacillus licheniformis (Bacillus licheniformis), and
Fermentation material to be sufficiently mixed using slot type turning machine, then carries out secondary aerobic fermentation 10 days, and every for 24 hours utilize slot type
Fermentation material is carried out turning by turning machine, and with every cubic metre of windrow 2.0m3The intake of/h is passed through 20 DEG C of cold air, so that hair
The temperature of windrow is kept for 40-50 DEG C during ferment；
6) granulating and drying: be added into fertilizer the elements such as micro iron, zinc and and 180kg urea, then by making
Grain machine carries out granulating and drying and obtains compound fertilizer.
Embodiment 3:
1) precipitate impurity elimination: municipal sludge be filtered precipitating by sieve, in removal sludge the sandstone of bulky grain and
Metal sundries；
2) raw material mixes: the excrement for the poultry and livestock that 280kg is dried being added into the filtered sludge of 1000kg, then
It is mixed, so that mixed water content is between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 9kg into mixed raw material, is uniformly mixed
After be put into fermentation tank, and cover sealed plastic bag in notch and ferment 5 days, until mixture peculiar smell is light removes；
4) it an aerobic fermentation: lifts except sealed plastic bag, addition weight is 6kg bacillus stearothermophilus
It (B.stereothermophilus) and 7kg thermophilic actinomycete (thermoactinomyces), then will using slot type turning machine
Mixture is sufficiently mixed with high-temperature aerobic actinomycete agent, then carries out fermentation 17 days, and will send out using slot type turning machine every 3h
Ferment material carries out turning, while with every cubic metre of windrow 9m3The intake of/h is passed through 55 DEG C of hot-air, so that heap in fermentation process
The temperature of material is maintained at 65-75 DEG C；
5) 4kg bacillus subtilis (Bacillus secondary aerobic fermentation: is added in the fermentation material after Xiang Yici aerobic fermentation
Subtilis), 4kg bacillus cereus (cereus) and 4kg bacillus licheniformis (Bacillus licheniformis), and
Fermentation material to be sufficiently mixed using slot type turning machine, then carries out secondary aerobic fermentation 12 days, and every for 24 hours utilize slot type
Fermentation material is carried out turning by turning machine, and with every cubic metre of windrow 2.5m3The intake of/h is passed through 25 DEG C of cold air, so that hair
The temperature of windrow is kept for 40-50 DEG C during ferment；
6) granulating and drying: be added into fertilizer the elements such as micro iron, zinc and and 210kg urea, then by making
Grain machine carries out granulating and drying and obtains compound fertilizer.
Embodiment 4:
1) precipitate impurity elimination: municipal sludge be filtered precipitating by sieve, in removal sludge the sandstone of bulky grain and
Metal sundries；
2) raw material mixes: the excrement for the poultry and livestock that 220kg is dried being added into the filtered sludge of 1000kg, then
It is mixed, so that mixed water content is between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 8.0kg into mixed raw material, and mixing is equal
It is put into fermentation tank after even, and covers sealed plastic bag in notch and ferment 3 days, removed until mixture peculiar smell is light；
4) it an aerobic fermentation: lifts except sealed plastic bag, addition weight is 8kg bacillus stearothermophilus
It (B.stereothermophilus) and 5kg thermophilic actinomycete (thermoactinomyces), then will using slot type turning machine
Mixture is sufficiently mixed with high-temperature aerobic actinomycete agent, then carries out fermentation 18 days, and will send out using slot type turning machine every 3h
Ferment material carries out turning, while with every cubic metre of windrow 9m3The intake of/h is passed through 55 DEG C of hot-air, so that heap in fermentation process
The temperature of material is maintained at 65-75 DEG C；
5) 4kg bacillus subtilis (Bacillus secondary aerobic fermentation: is added in the fermentation material after Xiang Yici aerobic fermentation
Subtilis), 4kg bacillus cereus (cereus) and 2kg bacillus licheniformis (Bacillus licheniformis), and
Fermentation material to be sufficiently mixed using slot type turning machine, then carries out secondary aerobic fermentation 15 days, and every for 24 hours utilize slot type
Fermentation material is carried out turning by turning machine, and with every cubic metre of windrow 2.5m3The intake of/h is passed through 20 DEG C of cold air, so that hair
The temperature of windrow is kept for 40-50 DEG C during ferment；
6) granulating and drying: be added into fertilizer the elements such as micro iron, zinc and and 200kg urea, then by making
Grain machine carries out granulating and drying and obtains compound fertilizer.
To compare beneficial effects of the present invention, ferment same amount of municipal sludge, the content phase of the required microbial inoculum of the present invention
35% or so is reduced for the amount of microbial inoculum in open invention CN1209324C, and the nutritional ingredient of fertilizer is more filled after fermentation
Foot.In addition, to fermentation front and back Heavy Metals in Sludge toxic element Pb, Hg and being more toxic polycyclic aromatic hydrocarbon and being measured, and remember
Record data such as the following table 1:
Table 1
As it can be seen from table 1 having in municipal sludge can be effectively reduced by the trough type fermentation to municipal sludge in the present invention
Noxious material, while for existing municipal sludge fermentation technique, for the usage amount of microbial inoculum in fermentation process of the present invention
38% or so is reduced, the cost of fermentation process is greatly reduced.
From the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to aforementioned implementation
Invention is explained in detail for example, those skilled in the art should understand that: it still can be to aforementioned each reality
Technical solution documented by example is applied to modify or equivalent replacement of some of the technical features；And these modification or
Person's replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of municipal sludge trough type fermentation technique, which comprises the following steps:
1) it precipitates impurity elimination: municipal sludge being filtered precipitating by sieve, removes the sandstone and metal of bulky grain in sludge
Sundries；
2) raw material mixes: the excrement of the poultry or livestock dried being added into filtered sludge, is then mixed, and guarantees
Mixed water content is between 50%-60%；
3) first anaerobic fermentation: being incorporated as the anaerobism microbial inoculum of mixture weight 0.5%-0.8% into mixed raw material, mixing
It is put into fermentation tank after uniformly, and covers sealed plastic bag in notch and ferment 3-5 days, removed until mixture peculiar smell is light；
4) aerobic fermentation: lifting the one time fermentation microbial inoculum for being added that weight is mixture 1.0%-1.5% except sealed plastic bag,
Then mixture and high-temperature aerobic actinomycete agent are sufficiently mixed using slot type turning machine, then carry out fermentation 15-20 days, and every
Fermentation material is subjected to turning using slot type turning machine every 3h, while being passed through enough hot-airs so that in fermentation process windrow temperature
Degree is maintained at 65-75 DEG C；
5) two that weight is fermentation material 0.6%-1.0% secondary aerobic fermentation: are added in the fermentation material after Xiang Yici aerobic fermentation
Secondary fermenting agent, and to be sufficiently mixed by fermentation material using slot type turning machine, it then carries out secondary aerobic fermentation 10-15 days,
And fermentation material is subjected to turning using slot type turning machine every for 24 hours, and be passed through appropriate cold air, so that windrow in fermentation process
Temperature is kept for 40-50 DEG C；
6) granulating and drying: the material of iron, the microelements such as zinc and appropriate nitrogen, phosphorus, potassium is added into fertilizer, then passes through pelletizer
It carries out granulating and drying and obtains compound fertilizer.
2. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that the family being added in the step 2
The excrement of fowl or domestic animal is the 20%-30% of sludge weight.
3. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that the primary hair in the step 4
Yeast-like fungi agent is thermophilic actinomycete and bacillus stearothermophilus.
4. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that the heat being passed through in the step 4
The temperature of air is 50-60 DEG C, and intake is every cubic metre of windrow 8-10m3/h。
5. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that the secondary hair in the step 5
Yeast-like fungi agent is bacillus licheniformis, bacillus cereus, bacillus subtilis mix bacterium agent.
6. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that is be passed through in the step 5 is cold
The temperature of air is 20-30 DEG C, and intake is every cubic metre of windrow 2-3m3/h。
7. municipal sludge trough type fermentation technique according to claim 1, which is characterized in that the nitrogen that is added in the step 6,
Phosphorus, potassium material mainly increased by way of pouring into urea, and be added urea weight be fertilizer 15%-20%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396009A (en) * | 2019-08-02 | 2019-11-01 | 济南中合环保科技有限公司 | A method of organic fertilizer is produced using municipal sludge |
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Application publication date: 20190503 |