CN105859333A - Method for resource utilization of sludge compost - Google Patents
Method for resource utilization of sludge compost Download PDFInfo
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- CN105859333A CN105859333A CN201510025560.7A CN201510025560A CN105859333A CN 105859333 A CN105859333 A CN 105859333A CN 201510025560 A CN201510025560 A CN 201510025560A CN 105859333 A CN105859333 A CN 105859333A
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention relates to a method for resource utilization of a sludge compost. The method comprises a sludge and biological accessory mixing pyrolysis pre-treatment process, a pretreatment material strengthen dehydration process, a press-filtration mud cake enclosed aerobic compost fermentation process and a sludge filtrate anaerobic gas production process. The method solves the problems of unreasonable nutritive proportion, difficult release of endogenous substances, low gas productivity and biogas quality, difficult dehydration of the terminal sludge, low fertilizer efficiency of the compost, long aerobic compost period, and high operation cost, has the advantages of short aerobic compost period, low energy consumption, low charging water content, good raw material mud quality and good heavy metal stabilization effect, various added agents in the prior art can be saved, sludge quantitative reduction and resource effect are obvious, the prepared organic fertilizer is safe and reliable, and the sludge quantitative reduction and deep resource utilization can be simultaneously realized.
Description
Technical field
The present invention relates to the method that one way of life recycling sludge utilizes, utilize particularly to one
The resource utilization method of domestic sludge compost, belongs to domestic sludge process field.
Background technology
Domestic sludge is a kind of to be made up of darkly multiple-microorganism cenobium, Organic substance and inorganic matter
The aqueous mixture of brown, domestic sludge not only water content is high, easily rots, has strong
Foreign odor, and its material such as the organic nutrient substance carried and heavy metal is unprocessed
On the premise of be directly discharged into the external world and can cause serious pollution.Pushing away recently as biotechnology
Extensively, the discharge capacity of sewage plant sludge dramatically increases, and it is current that the harmless resource of sewage sludge processes
Problem demanding prompt solution.The method for sludge treatment of Sewage Plant mainly includes such as landfill, burns and straight
Connecing Land_use change etc., all there is respective deficiency and drawback in these methods.At present, municipal sludge
Resource technology includes the following aspects substantially: (1) sludge composting；(2) mud feedstuff；
(3) sludge anhydration burning；(4) sludge materialization utilizes, and such as brickmaking (is coagulated hard filler, mixed
Solidifying soil aggregate), controlling the water circulation mud, haydite, glass；(5) pyrolyzing sludge extracts, pyrolysis oil preparation, egg
In vain, polypeptide, polysaccharide, chemical activation pyrolysismethod produce shale activated carbon, biological flocculant, training
Support ocean Microcystis aeruginosa；(6) anaerobic fermentation and acid production, methane, hydrogen etc..
Publication number is that the patent document of CN103011924A discloses a kind of sludge of sewage treatment plant
The method of charging compost, the method for this sludge composting uses sludge of sewage treatment plant wet basis to be main
Wanting raw material, add the improver pulverized and increase element agent, becoming windrow after stirring mixing, windrow is carried out
Aerobic fermentation, carries out turning after at least 10 days aerobic fermentations, more rotten through at least 10 days
Ripe, dry in the sun is done as finished product.This sludge composting method solve existing scheme produce mud viscosity big,
Washiness, the abnormal smells from the patient problem such as heavily, improves the sludge content of organic matter, but mud raw material does not has
Being fully used, the potential energy source in mud raw material moisture content is not developed.
Publication number is that the patent document of CN102838394A discloses a kind of sludge of sewage treatment plant
Aerobic composting process, this sludge composting technique includes that fermented pretreatment, fermentation and discharging add
The steps such as work, in fermented pretreatment step, add rice hulls in mud or wheat straw particle are swollen
Swollen dose, by the water content control in mud below 60%, add zymocyte, at fermentation step
In, use turning machine to process material, make compost material mix homogeneously, promote Organic substance fully to drop
Solving, shorten dewatered sludge fermentation period, discharging procedure of processing includes that course of conveying and pug slightly add
Work or polish.This sludge composting method achieves that organic sludge is innoxious, volume reduction, steady
Fixedization and the purpose of resource, but mud raw material is not the most fully used, in mud
The part potential energy source contained lost along with dehydration link.
Publication number is that the patent document of CN102731179A discloses a kind of organic waste and mud
Solid anaerobic and aerobic composting system and method for disposal, the program includes sludge composting equipment
And sludge composting method, wherein sludge composting equipment includes the high solid anaerobic digestion set gradually
Device, aerobic compost device, exsiccator, high solid anaerobic digestion device is furnished with methane purifying device, good
Oxygen Composter is furnished with aerator, and methane purifying device is furnished with biogas combustion device.Sludge composting side
Method generally comprises anaerobic treatment and Aerobic Process for Treatment, first mud mixture is carried out anaerobic treatment,
Again the material through anaerobic treatment is carried out Aerobic Process for Treatment.Mud directly carries out anaerobic digestion and there is battalion
Support that ratio is unreasonable, energy substance is difficult to release, factor of created gase and produce biogas poor quality, terminal
The problems such as sludge dewatering difficulty, compost fertilizer efficiency are low, and the aerobic compost cycle is long, and operating cost is high,
It is difficult to efficient resource utilization.
Summary of the invention
Sludge composting resource utilization method of the present invention discloses new scheme, have employed aerobic and sends out
Ferment combines the pretreating scheme adding bio-based adjuvant pyrolysis mud, have employed anaerobic digestion filtrate
Reclaim biogas and the process of biogas slurry, solve sludge anaerobic and process the problem produced, make dirt
Mud has obtained Deep utilization.
Sludge composting resource utilization method of the present invention includes step: (1) by mud and cellulose,
Add reactor after the material mixing of lignin Kiev, raise reactor temperature and pressure, raw
The material induction mud organic substance degraded of thing Kiev generates dehydration property and excellent less point of trophic structure
Sub-material, pyrolysis forms pretreated material；(2) sheet frame pressure is pumped into after being lowered the temperature by pretreated material
Filter is dehydrated, and obtains cachaza and filtrate, and the Organic nutrient of pretreated material enters filter
In liquid；(3) cachaza is carried out aerobic compost, generate fertilizer Nutrition Soil；(4) by filtrate
Carry out anaerobic digestion, form methane and biogas slurry, biogas is processed into compressed natural gas, by biogas slurry
It is processed into liquid fertilizer or enters sewage treatment plant's degraded.
Sludge composting resource utilization method of the present invention uses mud aerobic compost and anaerobic digestion
The process of filtrate, makes mud obtain Deep while minimizing and utilizes.
Accompanying drawing explanation
Fig. 1 is sludge composting resource utilization method process route chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As it is shown in figure 1, sludge composting resource utilization method process route chart of the present invention.Mud
Compost resource utilization method comprises the following steps.
(1) after mud and cellulose, the material mixing of lignin Kiev, add reactor, rise
High reactor temperature and pressure, specifically control pyrolysis temperature at 170～200 DEG C, heat
The solution time is 60～80min, and wherein, the addition of bio-based adjuvant is mud butt quality
20～30%, the pH value 2～4 of mud and bio-based adjuvant.Bio-based adjuvant induction mud has
The degraded of machine thing generates dehydration property and the excellent relatively small-molecule substance of trophic structure, and pyrolysis forms pre-place
Reason material, the moisture content of pretreated material is 78～85%.Process above utilizes bio-matrix auxiliary
Material rich cellulose, the characteristic of lignin so that it is blend generation pyrohydrolysis in proportion with mud anti-
Should, larger molecular organics cell wall breaking in bio-matrix adjuvant induction mud, promote sludge degradation,
Improve dewatering and the material trophic structure of mud, for the quick heap of mud of subsequent technique
Fertile, filtrate anaerobic digestion gas production creates advantage, promotes the Deep of mud.
(2) by pretreated material lower the temperature after pump into filter press dehydration, obtain cachaza and
Filtrate, the Organic nutrient of pretreated material enters in filtrate.In above process, locate in advance
The moisture content of reason material is 80%, and the moisture content of cachaza is 55%, the processed cycle
Being 1.5～2.0h, specifically pretreated material is successively through low pressure feed, high pressure charging, tympanum
Obtain cachaza after squeezing process and dump operation, described cachaza containing organic 60～
63% mass percent, containing full nitrogen 2% mass percent, containing full phosphorus 3% mass percent, containing complete
Potassium 0.5% mass percent.Material after pyrolysis can enter without adding any medicament
Filter press, charging water content requirement is low and filter pressing filtering velocity fast, and the moisture content of the cake of output is low,
Shale loosens, and the cachaza curing of compost time is short, and moisture loss is fast, pug nutritious and
Nutrient substance ratio is reasonable, and content of beary metal is up to standard, and gained filtrate biodegradability is good, and aerogenesis is imitated
Rate and aerogenesis quality are high, and methane content of bilogas is high.
(3) cachaza is carried out aerobic compost, generate fertilizer Nutrition Soil.In order to improve heap
Fertilizer efficiency fruit, shortens fermentation time, and the pug thickness of this programme aerobic compost is preferably 10cm,
In the part grog that above-mentioned aerobic compost generates is back to raw material there is predecomposition reaction in mixing.On
The cycle stating aerobic compost is 14～17d, compost product fertilizer Nutrition Soil containing organic 55～
58% mass percent, containing full nitrogen 2% mass percent, containing full phosphorus 3% mass percent, containing complete
Potassium 0.5% mass percent, moisture content is 33～36%, pH value 6.5～8.Cachaza warp
Cross aerobic compost and be converted into the nutritional organic fertilizer that carbon source is abundant, nitrogen phosphorus is appropriate, and ageing is taken
Between short.
(4) filtrate is carried out anaerobic digestion, form methane and biogas slurry, biogas is processed into compression
Natural gas, is processed into biogas slurry liquid fertilizer or enters sewage treatment plant's degraded.Above-mentioned anaerobic treatment mistake
Cheng Zhong, the temperature of anaerobic digestion controls at 30～36 DEG C, and hydraulic detention time is 20～35h,
Biogas yield is 0.35～0.42m3/ kgCOD, biogas contains methane 60～65% mass percent.
Above-mentioned technique is without additional carbon, and in filtrate, major part organic matter transformation is biogas, as the energy
Reclaim, containing macromole humic acid in biogas slurry, liquid fertilizer or backflow sewage treatment plant can be produced.
The anaerobic digestion of this programme and pyrolysis pretreating process are required for suitably raising reaction temperature
Degree, needs external heat source to provide energy, and in order to meet this requirement, this programme uses technique originally
The energy substance that body produces serves as above thermal source, the filter pressing sludge that specifically will obtain in step (2)
Cake burns, and provides thermal source for the filtrate anaerobic digestion in step (4), utilizes step (4)
In the biogas that obtains release energy, provide thermal source for the pyrolysis in step (1).Above scheme is adopted
Pipeline hot line can select currently existing scheme, it is also possible to according to case use specially designed
Scheme.
Technique mistake for more detailed explanation this programme sludge composting resource utilization method
Journey, is exemplified below example explanation.
Embodiment
Certain urban wastewater treatment firm thickened sludge, moisture content 84.1%, pH value 7.3, organic
51%, bio-based adjuvant moisture content 38.3%, pH value 2.6, organic 82%, mixing proportion
30% (mud butt).Under 190 DEG C of high temperature, material is carried out pyrolysis processing, pressure 1.2MPa,
Pyrolysis time is 60min.Material after pyrolysis is containing organic matter 64%, the material after pyrolysis processing
Cool to 70 DEG C, be pumped directly into filter press (2 × 800m without any medicament2) dehydration,
Feed time 30min, pressure 0.4MPa, squeeze pressure 0.6MPa, production cycle 1.5h,
Mud cake containing organic 62%, full nitrogen about 1.7%, full phosphorus about 2.7%, full potassium about 0.5%,
The organic nutrition of mud and adjuvant enters in filtrate, and mud realizes decrement.The mud cake being press-filtered out is straight
Tap into and aerobic high-rate composting system carries out the airtight compost of aerobic thin layer, thickness of thin layer 10cm,
Transmission advances, grog 10% backflow inoculation pre fermentation, air maximum replacing velocity 60m3/ min,
Composting cycle 14d, fertilizer moisture content 36%, pH value 7.0, organic 58%, full nitrogen 1.8%
Left and right, full phosphorus about 2.2%, full potassium about 0.5%, heavy metal does not detects, and mud cake is through well
Oxygen compost is converted into the nutritional organic fertilizer that carbon source is abundant, nitrogen phosphorus is appropriate.The filtrate being press-filtered out enters
Anaerobic digestion, material trophic structure changes, it is not necessary to additional carbon, control system temperature 36 DEG C,
Hydraulic detention time 24h, biogas yield 0.42m3/ kgCOD, fire damp content 65%.Filter
In liquid, most organic matter transformation is biogas, and as energy recovery, it is rotten that biogas slurry contains macromole
Grow acid, liquid fertilizer or backflow sewage treatment plant can be produced, make mud realize Deep and utilize.
Above procedure can be summarized as the concrete steps under the preparation technology premise of basis, i.e. in step
Suddenly in (1), mud contain organic 51% mass percent, moisture content 84.1%, pH value 7.3,
Bio-based adjuvant contains organic 82% mass percent, moisture content 38.3%, pH value 2.6, life
Addition is mud butt quality the 30% of thing Kiev material, mixes mud and bio-based adjuvant
Rear addition reactor, rising reactor temperature is to 190 DEG C, and pressure to 1.2MPa, pyrolysis is made
Being 60min with the time, the induction mud organic substance degraded of bio-based adjuvant generates dehydration property and nutrition
The relatively small-molecule substance that structure is excellent, pyrolysis forms pretreated material, and pretreated material is containing organic
Matter 64% mass percent.In step (2), pretreated material is cooled to 70 DEG C, will fall
Pretreated material after temperature pumps into filter press and carries out processed, and the processed cycle is
1.5h, pretreated material is successively through low pressure feed, high pressure charging, tympanum squeezing process and dump
Operation, feed time 30min, feed pressure 0.4MPa, squeeze pressure 0.6MPa,
To cachaza and filtrate, cachaza contains organic 62% mass percent, pretreated material
Organic nutrient enter in described filtrate.In step (3), cachaza is carried out
Oxygen compost, generates fertilizer Nutrition Soil, and aerobic compost generates 10% mass reflux of grog to raw
In material, mixing occurs predecomposition to react, and the air maximum replacing velocity of aerobic compost reaction is
60m3/ min, the cycle of aerobic compost is 14d, and fertilizer Nutrition Soil contains organic 58% mass
Percentage ratio, moisture content is 36%, pH value 7.In step (4), filtrate is carried out anaerobism and disappears
Changing, form methane and biogas slurry, the temperature of anaerobic digestion is 36 DEG C, and hydraulic detention time is 24h,
Biogas yield is 0.42m3/ kgCOD, biogas mass percent in methane 65%, biogas is added
Work becomes compressed natural gas, biogas slurry is processed into liquid fertilizer or enters sewage treatment plant's degraded.
It is dirty that the sludge composting resource utilization method of this programme provides a kind of new town sewage
Mud minimizing, recycling treatment scheme, it is achieved sludge reduction, innoxious and comprehensive resource
Utilize, after using the pyrolysis pretreatment measure adding bio-based adjuvant in mud to be greatly improved
The technological effect of continuous sludge aerobic compost, in conjunction with the technique of mud filtrate anaerobic digestion, effectively profit
With energy substance potential in mud filtrate, the energy substance using technique itself to produce provides
Thermal source needed for technique, solves mud and directly carries out anaerobic digestion and there is nutritive proportion and do not conform to
Reason, endogenous substance are difficult to release, factor of created gase and product biogas poor quality, terminal sludge dewatering is stranded
The problems such as difficulty, compost fertilizer efficiency are low, and the aerobic compost cycle is long, and operating cost is high, make mud subtract
The utilization of Deep is obtained while quantization.The sludge composting recycling side of this programme
Method have the following characteristics that (1) mud blend a certain proportion of adjuvant pyrolysis after, moisture content is low,
The compost response time shortens, and sludge cell wall breakage, hydrolysis effect are good, and heat material (grog) backflow is pre-
Hot cold burden (raw material), reduces energy consumption further；(2) compared with conventional dehydration processing mode, joint
Having saved the expense of medicament needed for conditioning sludge dewatering, it is bright that deep dehydration processes sludge reduction effect
Aobvious, charging moisture content is low, and dehydrated sludge cake moisture content is low, and mud cake loosens, and porosity is high, has
Machine matter is high, the follow-up sludge composting cycle short (short containing digestion time), sludge composting water evaporates
Scattering and disappearing fast, heavy metal stabilization is effective, and fertilizer quality is high；(3) material pressing filtering liquid can be biochemical
Property high, save anaerobic digestion nutritive salt and add the expense produced and shorten hydraulic detention time, produce
Gas rate and aerogenesis quality (methane content) are also improved；(4) this method utilizes heat exchanger to carry
High steam utilization efficiency, processing procedure saves Assistant cost, shortens whole flow process thing
The material time of staying, recycling sludge operating cost is made to be preferably minimized, sludge reduction, resource
Effect is notable, and the fertilizer prepared is safe and reliable, has significant environmental benefit, society's effect
Benefit and economic benefit.Based on above feature, the sludge composting resource utilization method phase of this programme
Than existing domestic sludge processing scheme, there is prominent substantive distinguishing features and significantly progress.
The sludge composting resource utilization method of this programme is not limited to embodiment disclosure,
Those skilled in the art can with the improvement project of reasonable prediction, and combine known according to this programme
The elementary factor alternative that general knowledge is made falls within the scope of this programme.
Claims (8)
1. sludge composting resource utilization method, is characterized in that including step:
(1) after mud and cellulose, the material mixing of lignin Kiev, add reactor, rise
High described reactor temperature and pressure, the induction mud organic substance degraded of described bio-based adjuvant is raw
Becoming dehydration property and the excellent relatively small-molecule substance of trophic structure, pyrolysis forms pretreated material；
(2) pump into filter press dehydration after being lowered the temperature by described pretreated material, obtain filter pressing sludge
Cake and filtrate, the Organic nutrient of described pretreated material enters in described filtrate；
(3) described cachaza is carried out aerobic compost, generate fertilizer Nutrition Soil；
(4) described filtrate is carried out anaerobic digestion, form methane and biogas slurry, described biogas is added
Work becomes compressed natural gas, described biogas slurry is processed into liquid fertilizer or enters sewage treatment plant's degraded.
Method the most according to claim 1, it is characterised in that the pressure that will obtain in step (2)
Filter mud cake burns, and provides thermal source for the filtrate anaerobic digestion in step (4)；Utilize step
(4) biogas obtained in releases energy, and provides thermal source for the pyrolysis in step (1).
Method the most according to claim 1 and 2, it is characterised in that in step (1), heat
Solving temperature is 170～200 DEG C, and pyrolysis time is 60～80min, adding of described bio-based adjuvant
Dosage is the 20～30% of mud butt quality, the pH value 2 of described mud and bio-based adjuvant～
4, the moisture content 78～85% of described pretreated material.
Method the most according to claim 3, it is characterised in that in step (2), described pre-
The moisture content processing material is 80%, and the moisture content of described cachaza is 55%, described dehydration
The process cycle is 1.5～2.0h, described pretreated material successively through low pressure feed, high pressure charging,
Obtaining described cachaza after tympanum squeezing process and dump operation, described cachaza is containing organic
Matter 60～63% mass percent, containing full nitrogen 2% mass percent, containing full phosphorus 3% percent mass
Ratio, containing full potassium 0.5% mass percent.
Method the most according to claim 4, it is characterised in that in step (3) is described good
The pug thickness of oxygen compost is 10cm, and the part grog that described aerobic compost generates is back to raw
In material there is predecomposition reaction in mixing.
Method the most according to claim 5, it is characterised in that in step (3) is described good
The cycle of oxygen compost is 14～17d, and described fertilizer Nutrition Soil is containing organic matter 55～58% mass
Percentage ratio, containing full nitrogen 2% mass percent, containing full phosphorus 3% mass percent, containing full potassium 0.5%
Mass percent, moisture content is 33～36%, pH value 6.5～8.
Method the most according to claim 6, it is characterised in that in step (4), described in detest
The temperature of oxygen digestion is 30～36 DEG C, and hydraulic detention time is 20～35h, and biogas yield is
0.35～0.42m3/ kgCOD, described biogas contains methane 60～65% mass percent.
Method the most according to claim 7, it is characterised in that
In step (1), described mud contain organic 51% mass percent, moisture content 84.1%,
PH value 7.3, described bio-based adjuvant contain organic 82% mass percent, moisture content 38.3%,
PH value 2.6, the addition of described bio-based adjuvant is the 30% of mud butt quality, by described
Add reactor after mud and the mixing of bio-based adjuvant, raise described reactor temperature to 190
DEG C, pressure to 1.2MPa, the pyrolysis time is 60min, the induction dirt of described bio-based adjuvant
Mud organic matter degradation generates dehydration property and the excellent relatively small-molecule substance of trophic structure, and pyrolysis is formed
Pretreated material, described pretreated material contains organic 64% mass percent；
In step (2), described pretreated material is cooled to 70 DEG C, after described cooling
Pretreated material pumps into filter press and carries out processed, and the described processed cycle is
1.5h, described pretreated material successively through low pressure feed, high pressure charging, tympanum squeezing process and
Dump operation, feed time 30min, feed pressure 0.4MPa, squeeze pressure 0.6MPa,
Obtaining cachaza and filtrate, described cachaza contains organic 62% mass percent, described
The Organic nutrient of pretreated material enters in described filtrate；
In step (3), described cachaza is carried out aerobic compost, generate fertilizer nutrition
Soil, described aerobic compost generates 10% mass reflux of grog, to mixing in raw material, predecomposition occurs
Reaction, the air maximum replacing velocity of described aerobic compost reaction is 60m3/ min, described aerobic
The cycle of compost is 14d, and described fertilizer Nutrition Soil contains organic 58% mass percent, contains
Water rate is 36%, pH value 7；
In step (4), described filtrate is carried out anaerobic digestion, form methane and biogas slurry, institute
The temperature stating anaerobic digestion is 36 DEG C, and hydraulic detention time is 24h, and biogas yield is 0.42
m3/ kgCOD, described biogas mass percent in methane 65%, is processed into compression by described biogas
Natural gas, is processed into described biogas slurry liquid fertilizer or enters sewage treatment plant's degraded.
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| CN107089847A (en) * | 2017-05-03 | 2017-08-25 | 无锡国联环保科技股份有限公司 | The aerobic compost method and its system of a kind of domestic sludge |
| CN107211765A (en) * | 2017-05-25 | 2017-09-29 | 陈橹达 | The method that cultivation ecological nutrition soil is manufactured using city solid waste |
| CN110590468A (en) * | 2019-11-07 | 2019-12-20 | 李光学 | Method for preparing organic fertilizer by using sugar refinery filter mud |
| CN111253177A (en) * | 2019-12-30 | 2020-06-09 | 上海方合正环境工程科技股份有限公司 | Method for preparing compound organic fertilizer by using river sludge |
| CN111393002A (en) * | 2020-03-23 | 2020-07-10 | 广东象博生态科技有限公司 | System for preparing nutrient soil through harmless biochemical sludge and preparation method of nutrient soil |
| CN111908756A (en) * | 2020-07-29 | 2020-11-10 | 同济大学 | Treatment method for efficiently and stably treating municipal sludge |
| CN112745152A (en) * | 2020-12-21 | 2021-05-04 | 长沙理工大学 | Synchronous recycling method for algae sludge salvaged in water body and aerobic composting of desilting bottom sludge |
| CN114014704A (en) * | 2021-12-13 | 2022-02-08 | 北京城市排水集团有限责任公司 | Urban sludge treatment fertilizer making system based on pyrohydrolysis-ultrahigh temperature aerobic fermentation |
| CN115179413A (en) * | 2022-09-09 | 2022-10-14 | 山东省聚祥固废应用研究院 | System for making bricks by using municipal sludge and production method |
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| CN107211765A (en) * | 2017-05-25 | 2017-09-29 | 陈橹达 | The method that cultivation ecological nutrition soil is manufactured using city solid waste |
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| CN111908756A (en) * | 2020-07-29 | 2020-11-10 | 同济大学 | Treatment method for efficiently and stably treating municipal sludge |
| CN112745152A (en) * | 2020-12-21 | 2021-05-04 | 长沙理工大学 | Synchronous recycling method for algae sludge salvaged in water body and aerobic composting of desilting bottom sludge |
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Application publication date: 20160817 |