CN105384474B - A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain - Google Patents
A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain Download PDFInfo
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- CN105384474B CN105384474B CN201510895370.0A CN201510895370A CN105384474B CN 105384474 B CN105384474 B CN 105384474B CN 201510895370 A CN201510895370 A CN 201510895370A CN 105384474 B CN105384474 B CN 105384474B
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Abstract
The present invention provides a kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain, and steps are as follows：Hydrogen peroxide is added into the sludge of high-moisture to be stirred together for iron ion, it places 0.1~6 hour, then press dewatering, or it is further dried, add nitric acid and hydrogen peroxide or nitric acid and oxygen, it is kneaded into the thick mud of foam or is mixed into loose pug, then closed placement carries out nitrification degradation maturation process；Corrective is added into sludge after curing, the corrective is at least one of flyash, boron mud, the potassium of alkalinity, magnesium or ammonium compounds, and the sludge after finally nitrification is degraded and neutralized is dried；Sludge after finally nitrification is degraded and neutralizes and dries directly is mixed with zymogenic particle is embedded to get finished product sludge compoiste fertilizer.The present invention solves the process for reclaiming of nearly qualified sludge, while solving the problem of current quick-acting fertilizer, slow-release fertilizer, base manure, microorganism fertilizer are not unified, simplify multiple fertilising, is conducive to land ecology fertilizer.
Description
【Technical field】
The present invention relates to a kind of preparation processes of the sludge compoiste fertilizer of deodoring and disinfecting low stain.
【Background technology】
The sludge class such as sewage plant, reservoir desilting, if heavy metal, organochlorine etc. can usually be used to make close to qualification
Make organic fertilizer so as to recycling, main resource method has at present：Two class of aerobic compost method and Unareobic fermentation.Current aerobic heap
Fertilizer is high pollution treatment technology, predominantly exhaust emission；Anaerobic fermentation equipment cost is high, and operational reliability is poor；In addition to this,
Currently, the problem of Organic sludge manure, is：
One, feed stage：
1. sludge dewatering is difficult with drying, generally have to control moisture to reduced levels, but in sludge before sludge fermentation
Polyacrylamide makes it be difficult to dehydrate, and makes moisture percentage in sewage sludge usually 85% or so, it is necessary to have good degradation of polypropylene
The method of amide can just make moisture percentage in sewage sludge drop to 50%-60% or so to be suitble to compost or landfill, current industrialized place
Reason method mainly has the method that lime alkalinity sterilizing/twice pressing is used first plus after iron chloride conditioning；Have at present using nitre in document
The method of acid, hydrogen peroxide, sodium hypochlorite, heat/oxygen treatments applied degradation of polypropylene amide has had long been known to everyone, and correspondingly uses dioxygen
The processing such as water/ferrous ion, ozone, chlorine dioxide, persulfate, which can also go together, simply to be derived；But problem is these realities
Room method is tested because of the problems such as equipment burn into equipment investment is big, safety is poor not yet industry park plan, and is connected subsequent treatment process not
It solves.
2. heavy metal is easy exceeded, then of high cost using theoretic acid cleaning process, spent acid is difficult to handle, wherein using nitre
Advantage is that nitric acid oxido-degradation ability is strong when sour, but there is the nitric oxide releasings in reaction product to pollute air problem still
Unresolved, then heavy metal removing rate is bad for phosphoric acid, and sulfuric acid hydrochloric acid etc. is of low cost, goes removing heavy metals ability good, but squeezes water outlet
It is difficult to recycling and Hui Chi.
3. sewage sludge disinfection is difficult, often lead in sewage sludge storage and malodor problem, theoretically sterilizing and processing when high temperature drying
Polyacrylamide mode is similar.
Two, fermentation stage：
1. the time of organic matter macromolecular biological decomposition is long, equipment investment is big, while generally requiring to add a large amount of stalks
Deng, on the one hand improve gas permeability, on the one hand supply microbial portion nutrient, so as to its high-speed fermentation, cost is very high.
2. a large amount of stinks overflow, causes severe air to pollute, manufacturer is caused to be difficult to be received by surrounding resident.
3. high salinity organic fertilizer raw material is difficult with conventional microbiological fermentation.
Three, Fertilizer application process：
1. such organic fertilizer is typically only capable to use as base manure because fertilizer efficiency release is slow, can not provide quickly --- it is slow
Release --- Base fertilizer performance.In addition, the acid ion remained in fertilizer after system fertilizer easily leads to saline Land, it is difficult to long
Phase uses.
Existing corresponding processing mode has：Sludge pre-treatment --- from the thirties in last century, especially in the U.S. 1979
Year《Specific resistance to filtration technological design handbook》In, pirate a large amount of Chinese invention sludge tune with small modifications on the basis of sludge is quenched
Matter patent；Some sludge break glue patent etc., and sludge composting --- some principles are well known, use aerobic and anaerobic technique
Fermentation, sludge composting technology not broken through substantially etc..
In Treatment of Sludge, cost, foul smell, three thresholds of heavy metal must crack could solve the problems, such as recycling, and can letter
Easy to operate is then the key point of disposing sludge in situ.
The use of Chen Kaihan, Li little Wen, Lv is that base classics ecological engineering science theory analysis is thought：For the fertilizer cycle of sludge
Using process, it is necessary to meet following condition：
1. the processing procedure three wastes are as low as possible.
A. the waste water of water-containing sludge compression process requires that sewage treatment facility can be returned, as sewage disposal process, soil ooze
Filter system, small to ecosystem harm, this substance for requiring compression to add must not be harmful to and not remain as far as possible.
B. there must not be useless solid in processing procedure as far as possible.Heavy metal isoconcentration contained by corresponding requirements fertilizer raw material closes
Lattice or close qualification, a large amount of dangerous wastes are generated to avoid leachate removing heavy metals step.
C. whole to there is a large amount of, high concentration exhaust gas to generate.Avoid anaerobism micro- as possible during being stored this requires sludge
Biological activity, drying sludge process avoid that using high-temperature process, sludge organism compost apparent foul smell should not be generated as possible.
2. processing procedure equipment and medicament, cost of labor should be low as possible.It must can meet the Fertilizer Transformed operation of field original position
To reduce trucking expenses.
3. system process is answered as well as possible, take up little area, it is not easy to because maloperation or external interference cause sludge manure
Recycle failure.
4. the processing mode that people must can be allowed to receive from landscape humanity.
【Invention content】
The technical problem to be solved in the present invention is to provide a kind of system of the sludge compoiste fertilizer of deodoring and disinfecting low stain
Standby technique, which solve the process for reclaiming of nearly qualified sludge, while solving current quick-acting fertilizer, slow-release fertilizer, base manure, microorganism
Be conducive to land ecology fertilizer the problem of fertilizer is not unified, simplifies multiple fertilising.
The invention is realized in this way：
A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain, processing step are as follows：
Step 1: pretreatment：Hydrogen peroxide is added into the sludge of high-moisture to be stirred together for iron ion, places 0.1
~6 hours, then the polyacrylamide in sludge uses the dehydration of conventional equipment twice pressing or geotechnique by Fenton-like system Partial digestion
Bag press dewatering obtains low water content sludge, i.e. solid content breaks glue deodorization sludge in the pretreatment of 60%-80%, can continue drying
To more low water content；
Step 2: nitrification degradation：Be added in the low water content sludge obtained by the step 1 nitric acid and hydrogen peroxide or nitric acid and
Oxygen is kneaded into the thick mud of foam or is mixed into loose pug, then closed placement carries out nitrification degradation maturation process；It is past after curing
It is added corrective in sludge, the corrective is at least one of flyash, boron mud, the potassium of alkalinity, magnesium or ammonium compounds,
Sludge after finally nitrification degradation is neutralized is dried；
Step 3: compoiste fertilizer：The sludge after degrading and neutralizing drying will be nitrified and the zymogenic particle of embedding is direct
Mixing is to get finished product sludge compoiste fertilizer.
Further, the dosage of hydrogen peroxide is the 0.4~5% of wet mud weight in the step 1, the use of iron ion
Amount is the 0.01~0.1% of wet mud weight.
Further, in the step 2 when nitric acid and hydrogen peroxide is added, the dosage of nitric acid is the 3 of dewatered sludge weight
~20%, the dosage of hydrogen peroxide is the 0~8% of dewatered sludge weight；When single addition nitric acid and oxygen, the dosage of nitric acid is dry dirt
The 3~20% of mud weight, the dosage of oxygen are the 0.1~5% of dewatered sludge weight.
Further, the acid-base value neutralized in the step 2 is controlled in pH6~8.
Further, in the step 2, the time for nitrifying degradation is 3~48 hours.
The invention has the advantages that：
For step 1 of the present invention compared to general iron chloride conditioning/lime alkalinity sterilization processing, cost is relatively low, squeezes out
Water increases problem, no ammonia odor taste without salinity, and sludge is easy to subsequent processing；Step 2 mixing is easy, and reaction speed is fast, entire step
Process is discharged without apparent oxynitrides, when solving the tank solution immersion heating progress nitrification processing in existing laboratory
Generate a large amount of nitric oxides, nitrogen dioxide gas pollution environment；After finished product fertilizers landing is made in step 3, quick-acting fertilizer nitrate content
Meet it is water-soluble go out, part nitrification degradation organic fertilizer slowly enters soil in the form of nitrohumic acid, nitrification organic matter etc., and remaining has
Partially due to rear degrading bacteria embedding body gradually decomposes after a certain time, various microorganisms successively release to residual machine fertilizer
Remaining fertilizer plays depth degradation and the betterment of land, and gradually micro- secondary degradation of release biology enters soil.
In short, the present invention solves the process for reclaiming of nearly qualified sludge, at the same solve current quick-acting fertilizer, slow-release fertilizer,
Be conducive to land ecology fertilizer the problem of base manure, microorganism fertilizer are not unified, simplify multiple fertilising, and environmental pollution is small, warp
Benefit of helping is big.Apply also for the problem solution that various mud, farm's rubbish etc. dispose recycling in situ.
【Specific implementation mode】
A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain according to the present invention, preparation process is such as
Under：
Step 1: glue draining and deodorization step are broken in pretreatment：For handling the pollutant qualification containing polyacrylamide
There is greater advantage when sludge (such as domestic sewage factory sludge of pollutant qualification, mechanical dredging sludge etc.).By the dirt of high-moisture
The hydrogen peroxide that wet mud weight is 0.5-5% is added in mud and 0.01%-0.1% iron ions are stirred together for, and places 0.1-6 hours
Time polyacrylamide, at this time can conventional equipment twice pressing dehydration (factory) or soil engineering bag (field) by Fenton-like system Partial digestion
Press dewatering, sewage return pond circularly purifying or are directly entered land percolation, and solid content can be obtained at this time at the pre- place of 60%-80%
Reason breaks glue deodorization sludge, is solved the problems, such as in common short time storage process smelly.It can transport and cover after being further dried
It buries or further recycling is processed, it also can directly further recycling processing.The step uses hydrogen peroxide, does not increase dirt after decomposition
Dye substance enters external environment, and harmless iron ion is then directly fixed by sludge.It is identical using properties such as ozone, chlorine dioxide,
But craftsmanship obviously deteriorates.Salt or by-product harmful substance, no industrial value are easily brought into using other oxides.
The effect of this step：Degradation of polypropylene amide, sterilization and deodorization, oxidized metal sulfide.
This step need to return sewage disposal system due to having to arrange outside waste water, do not use preferably have after decomposing remaining salinity,
The gel breaker of phosphorus nitrogen, organic acid, in order to avoid influence environment and subsequent handling implementation.The side such as heating, ultrasonic wave, grinding is not used yet
Method promotes dehydration, in case energy consumption, peculiar smell and excessive organic matter are discharged from waste water.Hydrogen peroxide is optimum way, compared to general
Iron chloride conditioning/lime alkalinity sterilization processing, cost is relatively low, squeezing is discharged salt-free degree increase problem, no ammonia odor taste, and sludge is easy
In subsequent processing.
Step 2：Sludge nitrifies degradation step：To pre-processing low water content sludge obtained by step 1, add nitric acid and peroxidating
Hydrogen or oxygen are degradation medicament, and kneading is neutralized into the thick mud of foam, or is mixed into loose pug, and closed placement carries out nitrification degradation,
Larger molecular organics are subjected to initial breakdown.According to dewatered sludge weight ratio HNO3For 3-20%, H2O2For 0-8%, oxygen then dosage
In 0.1%-5%.Nitrify degradation time 3-48 hours, 20-80 degrees Celsius of temperature.The step is different from a large amount of molten in phosphorus nitrogen determination
Liquid impregnates the laboratory way that heating carries out nitrification degradation.
The kneadings such as sludge flyash after curing, boron mud, alkalescence potassium, ammonium, magnesium compound neutralize and adjustment squeezing and dry
Dry performance is neutralized between PH6-8.Do not have to carbonate preferably and largely discharges unhelpful gases affect squeezing to avoid generation.This step
Suddenly there is highly exothermic phenomenon, material is caused further to be dehydrated and cure and degradation.
Without using iron ion catalysis, then reaction speed is slow, and escaping gas is more, and iron ion is provided by step 1；If no
H is used in combination2O2Or oxidants such as oxygen and closed, then it nitrifies degradation step and notoriously generates a large amount of nitric oxides, dioxy
Change nitrogen and pollute environment, it is impossible to be used in industrialized production.Neutralize PH excessively alkalinity then ammonia leakage.
It is crucial that not being kneaded/being mixed into loose pug shape or the thick mud of foam, then material nitrification degradation process is difficult equal
Even, nitric acid and nitric oxide, nitrogen dioxide gas are difficult to be fully absorbed by material.
When sludge analysis finds that pollutant is slightly exceeded, the drying squeezing degree of 1 step can be suitably reduced, compared with High water cut
The pretreating sludge of amount uses step 2, makes foam mud and is handled, though processing product water content is big, degradation reaction speed
Slow and compared with occupation of land side, advantage is fully to squeeze out leaching heavy metal aqueous solution in foam mud, You Haiyou after the neutralization
Machine object aqueous solution etc..After squeezing, liquid is made after heavy metal chelate precipitation removes removing heavy metals, degradation or extraction harmful organic substance
It is used for liquid fertilizer.
By Step 1: two treated nitrification degradation sludge neutralize after drying-granulating, it is low aqueous as organic fertilizer raw material
Loose pug or when appointed condition does not have when the in-situ treatment mud of field after the neutralization of amount, can directly stack drying.
Step 3: compound organic fertilizer making step：Nitrification degradation sludge is direct with embedding zymophyte particle without compost
Mixing, becomes finished product fertilizers.The nutriment that the step can embed the degradation speed of medicament by zymophyte and embedding is added in vivo
To adjust Microbiological release order.Finished product fertilizers landing after quick-acting fertilizer nitrate content meet it is water-soluble go out, part nitrification degradation organic fertilizer
Soil is slowly entered in the form of nitrohumic acid, nitrification organic matter etc., remaining organic fertilizer is partially due to rear degrading bacteria packet
It buries body gradually to decompose after a certain time, various microorganisms successively release plays depth degradation and the betterment of land to remaining fertilizer
Effect, and gradually micro- secondary degradation of release biology enters soil.
The present invention is further described below in conjunction with specific embodiment.
Embodiment one：
Big examination：1 ton of Quanzhou sewage treatment plant qualification domestic sludge, moisture content 87%, big weight polyacrylamide is taken to exist,
Slightly dark hair is smelly, and sticky have certain elasticity, calcination find to be substantially organic matter.It is respectively added slowly to 25 kilograms using 2 sets of hoses
28% industrial hydrogen peroxide (being folded over 7 kilograms of hydrogen oxide, i.e., addition is the 0.7% of domestic sludge wet weight), 0.5 kilogram of polymerization
Aqueous solution made of ferric sulfate dissolving (about 0.13 kilogram of iron ion of folding, i.e. addition are the 0.013% of domestic sludge wet weight),
It is mixed using small-sized forklift when being added.The quick desaturation of sludge at this time is viscous flow shape, and deodorization, color becomes light brown.It puts
Set pumping press filtration in plate and frame filter press in 3 hours, squeezing water outlet is simply monitored using titanium salt finds not showing orange, i.e. hydrogen peroxide
Fully reaction finishes, can be discharged into treatment tank circular treatment.Water content about 70%, is about reduced half after sludge pressing,
Light brown, strong plasticity mud cake shape places dry 3 day time mud cake inside and outside odorless and discoloration, and drying experiment finds drying
Speed is obviously improved, and there are apparent Earthy Taste rather than apparent foul smell in when drying.Wanting for factory sludge deodorization decrement disposition is met
It asks.
This sludge cake, which is dried to water content about 40% or less to stir, is broken into loose pug.It is to be dried to can absorb water
It is crushed afterwards and is packed into plastics reaction bag, 15 kilograms of 65% industrial nitric acid, 28% industrial hydrogen peroxide are matched according to every 100 kilograms of dewatered sludges
5 kilograms, the mixing of the proportioning of appropriate amount of water, are spilled into bag and infiltrate pug in batches, and speed is added to ensure in the polypropylene bag tightened
Will not have subject to the flatulence that sack can not bear.Bag is opened after 24 hours, the pug moistened is taken out mixed with flyash, boron mud etc.
Conjunction is neutralized to detection PH until neutrality.N-process heat release is simultaneously dried rapidly, and moisture is captured as crystallizing by nitrate simultaneously
Water.Dry packing after material is broken.After the dioxygen oxidation that whole process is gone out due to nitric oxide by decomposing hydrogen dioxide solution again
It is absorbed into nitric acid, without apparent oxynitrides release phenomenon.
This organic fertilizer intermediate is mixed with a variety of embedded zymophyte agglomerate grains Ji Wei finished product, vegetable cultivation experiment
The middle function of finding the fertilizer and have both quick-acting sustained releases, microorganism base manure, using process odorless, no applications of farmyard manure necessarily goes out
Existing a large amount of insects.In Quanzhou City project support coastal sandy land greening experiment find buckwheat, millet, Jerusalem artichoke, pachyrhizus, metaplasia,
The growing ways such as weeds, sugarcane, the shrub that crawls, horse-tail are splendid.Sand ground sampling after using 1 year is found, sand ground organic matter and micro-
Biological showed increased, water holding capacity obviously rise.
The fertilizer carries out water-soluble experiment and finds that heavy metal can not migrate substantially under the normal pH value of soil of PH5-9, hence it is evident that
Better than the organic fertilizer that commercially available traditional aerobic compost method makes, it is rational explain be heavy metal substantially by a large amount of nitrohumic acid with
In flyash and by-product --- silicic acid is fixed.Conclusion：Domestic sludge whole process low stain fertilizer fertilizer is feasible, can be according to policy
Take the circumstances into consideration under allowing as farm manure or gardens fertilizer to use.
Market survey is found：
Feedstock portions：About 1250 yuan/ton of about 150 yuan/ton of sludge subsidy, nitric acid and the current producer price of hydrogen peroxide, fine coal
About 50 yuan/ton of ash, about 500 yuan/ton of magnesia.
Existing agricultural fertilizer：According to Chinese chemical fertilizer net price in 2015, about 100 yuan/ton of the current producer price of dry pig manure, tradition was low
350 yuan/ton of organic compost producer price is imitated, mainstream organic fertilizer producer price 600-800 members, efficient organic fertilizer and cake fertilizer producer price are about
1500 yuan/ton, the quick-acting fertilizers price such as ammonium nitrate, nitric acid calcium and magnesium and composite fertilizer is at 2000 yuan/ton or more, humic acid fertilizer and micro- life
About 1500-2000 yuan/ton of object composite fertilizer.
The technological feasibility：The current water content of sludge of dispatching from the factory is unable to reach 40% standard of landfill usually 75% or so,
It is often difficult to be incinerated factory's receiving.According to the present invention, (i.e. step 1) cost is about 80 for 1 ton of 75% domestic sludge deodorization decrement
Member or so is far below government subsidy and international quenched alkalization method, such as using farm's soiled litter as raw material also can, easy quilt
Market receives；The compound fertilizer of the technique productions, about at 300-500 yuan/ton or so, property is in cost with micro organism composite fertilizer
Same rank, while solving sludge place to go and bad-smell problem, easily receive for manufacturer and user.
Embodiment 2.
Big examination：Take 2 tons of Quanzhou drainage dredging sludge, soil engineering bag packaging, water content 70%, without poly- propionamide, black
Stench, feature are that sediment charge is more, and content of organics is less, and heavy metals exceeding standard is serious.It is directly fitted into plastics pond in situ, adds
Entering 0.5 kilogram of poly-ferric chloride, (about 0.2 kilogram of iron ion of folding, i.e. dosage is the solution 0.01%) made and 40 kilogram 28%
Industrial hydrogen peroxide (being folded over 11 kilograms of hydrogen oxide, i.e. dosage 0.55%), iron Chinese catalpa and rake are manually stirred, dredged sediment
Black and stink rapidly disappear, sludge desaturation, place 2 hours rear shovels and enter soil engineering bag self-draining, drain odorless, sludge
It never degenerates during placing 7 days.Calculating at cost can about be acceptable to the market at 30-40 yuan/ton, and display has solved to perplex dredging at present
The industry problems of stench need not carry out high cost and be difficult to the dredging silt stockyard to set up an office setting, can be used for landfill or conduct
Earthwork soil uses.
Further recycling experiment：Deodorized sludge is transferred to strange land, and foaming is oxygenated in blender and makes into foam mud
Slurry, is added 65% industrial nitric acid 5% (according to the weight ratio of over dry sludge), is fitted into pond after mixing immediately, and plastics membrane cover is real, pond
Middle redundant space oxygenation, estimation flow of oxygen are about the 0.5-1% of over dry sludge quantity.Sheet frame squeezes after placing 24 hours, prison
It surveys and finds that the content of beary metal such as lead zinc-copper cadmium decline 20-37% in sludge, flyash and oxidation are used in squeezing sludge and draining respectively
It is feasible for the experiment discovery of afforestation liquid fertilizer after the heavy metal in draining of being gone out with heavy metal chelant after magnesium neutralizes.
It will be dried among the above with squeezing sludge, microorganism agglomerate made of mix Forest Litter is found for woods fertilizer
It is feasible, but there are problems that soil Accumulation of heavy metals and certain leaching, there are similar with the commercially available sludge fertilizer of conventional aerobic compost method
Situation, reasonable dismissal are that inorganic content is high in dredged sediment fertilizer, and nitrohumic acid content is relatively low, and flyash dosage is low, causes
The fixation of heavy metal ion is insufficient, to not show the advantage relative to aerobic compost organic fertilizer.Illustrate this method needs
Select heavy metal close to qualified sludge class, it is no mixed sludge of industry and mining waste water that can be generally thought, and is otherwise influenced organic multiple
The reliability of Hefei quality.
In short, the present invention solves the process for reclaiming of nearly qualified sludge, at the same solve current quick-acting fertilizer, slow-release fertilizer,
Be conducive to land ecology fertilizer the problem of base manure, microorganism fertilizer are not unified, simplify multiple fertilising, and environmental pollution is small, warp
Benefit of helping is big.Apply also for the problem solution that various mud, farm's rubbish etc. dispose recycling in situ.
Although specific embodiments of the present invention have been described above, those familiar with the art should manage
Solution, we are merely exemplary described specific embodiment, rather than for the restriction to the scope of the present invention, it is familiar with this
The technical staff in field modification and variation equivalent made by the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (4)
1. a kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain, it is characterised in that：Processing step is as follows：
Step 1: pretreatment：Hydrogen peroxide is added into the sludge of high-moisture to be stirred together for iron ion, the use of hydrogen peroxide
Amount is the 0.4~5% of wet mud weight, and the dosage of iron ion is the 0.01~0.1% of wet mud weight；It is small to place 0.1~6
When, then the polyacrylamide in sludge uses the dehydration of conventional equipment twice pressing or soil engineering bag pressure by Fenton-like system Partial digestion
Dehydration is squeezed, low water content sludge is obtained, is i.e. solid content breaks glue deodorization sludge in the pretreatment of 60%-80%, can also be further dried；
Step 2: nitrification degradation：Nitric acid and hydrogen peroxide or nitric acid and oxygen are added into low water content sludge obtained by step 1,
It is kneaded into the thick mud of foam or is mixed into loose pug, then closed placement carries out nitrification degradation maturation process；Toward sludge after curing
Middle addition corrective, the corrective are at least one of flyash, boron mud, the potassium of alkalinity, magnesium or ammonium compounds, finally will
Sludge after nitrification degradation neutralizes is dried；
Step 3: compoiste fertilizer：Sludge after nitrification degradation is neutralized and dried directly is mixed with zymogenic particle is embedded,
Get product sludge compoiste fertilizer.
2. a kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain according to claim 1, feature
It is：In the step 2 when nitric acid and hydrogen peroxide is added, the dosage of nitric acid is the 3~20% of dewatered sludge weight, peroxide
The dosage for changing hydrogen is the 0~8% of dewatered sludge weight；When nitric acid being added and when oxygen, the dosage of nitric acid be dewatered sludge weight 3~
20%, the dosage of oxygen is the 0.1~5% of dewatered sludge weight.
3. a kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain according to claim 1 or 2, special
Sign is：The acid-base value that the step 2 neutralizes is controlled in pH6~8.
4. a kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain according to claim 3, feature
It is：In the step 2, the time for nitrifying degradation is 3~48 hours.
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| CN106699366A (en) * | 2016-12-16 | 2017-05-24 | 北京桑德环境工程有限公司 | Method for manufacturing organic granular fertilizer by utilizing black and odorous water body sediments |
| CN108164349A (en) * | 2018-03-16 | 2018-06-15 | 重庆市林业科学研究院 | A kind of nutrient matrix cultivated for Ornamental Bamboo and preparation method thereof |
| CN109234264A (en) * | 2018-10-09 | 2019-01-18 | 王雄伟 | A kind of preparation process of the immobilized microorganism product of efficient degradation organic sludge |
| WO2021048825A1 (en) * | 2019-09-15 | 2021-03-18 | Paulee Cleantec Ltd. | Organomineral fertilizer and process therefor |
| CN111072424B (en) * | 2019-12-24 | 2021-08-20 | 东华大学 | Slow-release carbon-based small molecular fertilizer and preparation method thereof |
| CN112028709B (en) * | 2020-08-06 | 2023-04-14 | 内蒙古工业大学 | Application of active silicon material in preparation of water-retention slow-release microbial fertilizer |
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