CN109399881A - A kind of method for sludge treatment - Google Patents
A kind of method for sludge treatment Download PDFInfo
- Publication number
- CN109399881A CN109399881A CN201811393391.2A CN201811393391A CN109399881A CN 109399881 A CN109399881 A CN 109399881A CN 201811393391 A CN201811393391 A CN 201811393391A CN 109399881 A CN109399881 A CN 109399881A
- Authority
- CN
- China
- Prior art keywords
- sludge
- earthworm
- sludge treatment
- treatment according
- fermentation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The present invention relates to a kind of method for sludge treatment, belong to technical field of sludge treatment.The present invention uses two-part biological cycle technology, by the physicochemical property of conditioning of mud, carries out 50 DEG C or more compost pretreatments, harmful organism, chemical decomposition polluter in killing sludge inoculate earthworm disposition sludge.This method, which can be reduced, leads to the probability of earthworm death because of the harmful substance in sludge, to improve the efficiency that earthworm decomposes sludge, achievees the purpose that sewage sludge harmlessness, recycling.
Description
Technical field
The present invention relates to a kind of method for sludge treatment, belong to technical field of sludge treatment.
Background technique
According to the portion's of building statistics is lived, in by the end of December, 2017 by, China is accumulative to build up sewage treatment plant 5027, sewage treatment
For ability up to 1.88 billion cubic meters/day, year generates more than 5,000 ten thousand tons of sludge of water content 80%." water prevention and cure of pollution action plan " rule
Fixed, ground level and the above municipal sludge harmless treatment disposition rate should reach 90% or more before the year two thousand twenty bottom.And it is tied according to investigation
Fruit shows that sludge caused by wastewater treatment in China factory has 70% not dealt carefully with, and sludge is arbitrarily stacked and caused
Pollution and recontamination problem cause society concern.The problem of environmental pollution that sludge generates becomes increasingly conspicuous, and causes greatly
Security risk, environmental pressure and financial burden.The processing and disposition of sludge are a global problem, traditional method of disposal
Including landfill, burning and agricultural use etc., these methods not only be easy to cause secondary pollution, but also take up a large area or locate
The operation that somewhat expensive is set to sewage treatment plant brings heavy burden.Therefore, how to deal carefully with sludge and have become one
A urgent problem to be solved.
The stabilization of sewage plant sludge and dehydration (general dehydration to moisture content up to 70~80%) are referred to as the processing of sludge, will be dirty
Compost, landfill, desiccation and the heat treatment of mud and the final disposition using referred to as sludge.In terms of world wide, some prosperity states
Family substantially uses sludge incineration, sanitary landfills, ocean dumping, sludge composting, agricultural sludge etc. for the method for sludge treatment.Beauty
State's late 1980s sludge accounts for about 42% based on filling, and is used for farmland within 1998 about 59%.Japan is due to national territorial area
Smaller, sludge incineration accounts for about 63%, and land use 22%, landfill 5%, other about 10%.The emphasis of each member state, European Union is not
Identical to the greatest extent, Luxembourg, Denmark and France are mainly based on agricultural sludge at present, the agricultural of the states such as Denmark, Holland and Finland sludge
Using accounting for 43%, 53% and the 40% of total amount respectively, the ratio of states' agricultural sludge such as Ireland, Finland and Portugal can also be gradually
Increase, and the large percentage that France, Luxembourg, Germany and Holland burn.
Treatment of Sludge and disposal technology are started late in China, and for China's national situation, sludge anhydration burning process engineering is thrown
Money and operating cost are relatively high, are relatively applicable in big city, large-scale town cluster and the nervous area of land used.Sludge composting is necessary
In conjunction with the demand of user, on the basis of market survey, it may be considered that promote and apply.Currently, China is in various sludge treatment sides
In method, agricultural to account for about 44.8%, land landfill accounts for about 31%, other disposition account for about 10.5%, separately there is about 13.7% city
Sludge just comes back in nature without any processing.The farmland utilization of sludge can provide nutritional ingredient, improvement for crop
And fertilizing soil, and sludge can be largely handled, but if continuous administration sludge, there are the accumulations of the harmful substances such as heavy metal in soil
The phenomenon that increase, and then increase the risk of soil pollution.
The technology of incineration method with the device is complicated, energy consumption is high, investment is high, and with atmosphere polluting problem；Landfill method by with
The limitation on ground, and the environment around landfill yard can also deteriorate；Sea meeting Marine Pollution is thrown, to marine ecosystems and human foods chain
It threatens, international convention has been prohibited；With composting method, treated that municipal sludge carries out agricultural use, has economic letter
Just, the advantages that resourcebility, but the accumulation of the hazardous contaminants such as heavy metal and pathogen, organic matter in the soil is sludge
A major obstacles in compost use.Developed country just promotes anaerobic digestion process technology and Sludge Reduction Technologies in recent years
Expansion research passes through the anaerobic digestion of various pretreatment (such as pyrolysismethod, hydrolysis acidification method, alkali process) Lai Tigao sludge
Can, the measures such as metabolism, biological decomposition processing are coupled by ozone oxidation, ultrasonic technology, solution and carry out sludge reduction processing, so
And these technical methods are not promoted due to there are limitation.
Application publication number is that the Chinese invention patent application of CN106927872A discloses city domestic sewage treated
The method of sludge aerobic compost.Then this method carries out high-temperature aerobic fermentation first by sludge through dealing with earthworm to obtain the final product.But sludge
Present in the ingredients such as pathogen, chemical substance may result in earthworm poisoning, be decreased obviously heavy metal degradation rate, or even reach
Less than the effect of degradation heavy metal.
Summary of the invention
In order to improve the degradation rate of heavy metal, the present invention provides a kind of method for sludge treatment.
To achieve the above object, the technical scheme is that
A kind of method for sludge treatment, includes the following steps:
(1) sludge is mixed to carbon-nitrogen ratio 20:1~30:1 with leavening agent and forms mixture；
(2) mixture is subjected to the sludge fermentation product that ferments to obtain at 50 DEG C or more；
(3) cooling gives birth to sludge fermentation product temperatur hereinafter, earthworm is inoculated into sludge fermentation product to 35 DEG C
Object processing.
Leavening agent described in step (1) is one or more of rice husk, sawdust, dry branches and fallen leaves.
The time of fermentation described in step (2) is 5 days or more.
Preferably, the time of fermentation described in step (2) is 6 days.
Fermentation described in step (2) is aerobic fermentation.
Ventilation quantity in fermentation process described in step (2) is 0.3~0.5m3/min.m3。
Earthworm described in step (3) is that compatriot loves victory earthworm.
The quantity of the inoculation of earthworm described in step (3) is 50~200 earthworms of every kilogram of sludge seeding.
Preferably, the quantity of the inoculation of earthworm described in step (3) is 50~100 earthworms of every kilogram of sludge seeding.
Biological processing time described in step (3) is 20~30 days.
Preferably, biological processing time described in step (3) is 20~25 days.
It is further preferred that biological processing time described in step (3) is 20 days.
Sludge is mainly from various industry and sanitary sewage, wherein containing a large amount of pathogen, carcinogen and heavy metal
Element, wherein pathogen can be effectively reduced in composting treatment process.Although there is fraction of pathogens bacterium under certain condition can be again
Raw, but after being manured into soil, indigenous microorganism, which has, prevents the regenerated effect of these pathogens, so through Composting or digestion process
Sludge will not cause the pollution of pathogen in being manured into soil, but can cause soil and crop heavy metal containing heavy metal in sludge
Content increases, and earthworm can degrade the content of beary metal in soil to a certain extent.Sludge is first subjected to short-term compost, so
Earthworm digestion is introduced afterwards and decomposes sludge, has not only been solved the problems, such as brought by municipal refuse stacking and landfill, but also produce urgent need
Organic fertilizer makes the ecology in city enter benign cycle.
Beneficial effects of the present invention:
The present invention uses two-part biological cycle technology, by the physicochemical property of conditioning of mud, carries out During High-Temperature Composting and locates in advance
It manages, harmful organism, chemical decomposition polluter in killing sludge inoculate earthworm disposition sludge.This method can reduce dirt
Pathogen in mud, reducing leads to the probability of earthworm death because of the harmful substance in sludge, to improve an earthworm degradation huge sum of money
The efficiency of category, the further efficiency for improving earthworm and decomposing sludge, achievees the purpose that sewage sludge harmlessness, recycling.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment 1
The present embodiment carries out compost using Xinyang sewage treatment plant dewatered sludge and leaf in the way of volume ratio 6:4
Processing forms mixture (carbon-nitrogen ratio of mixture is 20:1), ventilation quantity 0.3m3/min.m3, ventilation time is every 6 hours
Divulge information 15min；Mixture was warming up to 56.3 DEG C in 3rd day to ferment, 56.3 DEG C ferment 6 days, this fermentation process can kill greatly
Most pathogens realize sewage sludge harmlessness.
After fermentation, 35 DEG C are down to compost temperature, 50 compatriots like victory earthworm, processing according to every kilogram of sludge seeding
20 days, wormcast and earthworm are separated, earthworm recycles, and wormcast is used as organic fertilizer.By dealing with earthworm, in sludge
Content of beary metal accordingly decreases, heavy metal Cd, Cu, Pb, Zn content reduce by 100% than originally respectively, 13.5%,
89.5%, 13.6% (as shown in table 1).
Therefore, first carry out hot fermentation, then with dealing with earthworm sludge can eliminate or stabilized sludge in the substances such as nocuousness, from
And reach the resource utilization of urban sewage treatment plant sludge.
The variation of Heavy Metals in Sludge total amount before and after 1 dealing with earthworm of table
| Project | Cd | Cu | Pb | Zn |
| Before dealing with earthworm | 3.35 | 127.89 | 436.91 | 605.12 |
| After dealing with earthworm | It is not detected | 110.64 | 45.82 | 522.76 |
| Degradation rate | 100% | 13.5% | 89.5% | 13.6% |
Embodiment 2
The present embodiment and the difference of embodiment 1 be only that, 50 deficits love victory earthworms will be inoculated in embodiment 1 replace with and connect
200 compatriots of kind love victory earthworms.By dealing with earthworm, Heavy Metal Level In Sludge is accordingly decreased, heavy metal Cd, Cu, Pb,
Zn content reduces by 100%, 28.97%, 90.55%, 27.22% (as shown in table 2) than originally respectively.
The variation of Heavy Metals in Sludge total amount before and after 2 dealing with earthworm of table
| Project | Cd | Cu | Pb | Zn |
| Before dealing with earthworm | 3.35 | 127.89 | 436.91 | 605.12 |
| After dealing with earthworm | It is not detected | 90.84 | 41.28 | 440.43 |
| Degradation rate | 100% | 28.97% | 90.55% | 27.22% |
Embodiment 3
The present embodiment carries out compost using Xinyang sewage treatment plant dewatered sludge and leaf in the way of volume ratio 4:6
Processing forms mixture (carbon-nitrogen ratio of mixture is 23:1), ventilation quantity 0.5m3/min.m3, ventilation time is every 6 hours
Divulge information 15min；Mixture was warming up to 52.9 DEG C in 5th day to ferment, 52.9 DEG C ferment 5 days, this fermentation process can kill greatly
Most pathogens realize sewage sludge harmlessness.
After fermentation, 32 DEG C are down to compost temperature, 50 compatriots like victory earthworm, processing according to every kilogram of sludge seeding
25 days, wormcast and earthworm separation, earthworm recycled, and wormcast is used as organic fertilizer.It is heavy in sludge by dealing with earthworm
Tenor accordingly decreases, heavy metal Cd, Cu, Pb, Zn content reduce by 100% than originally respectively, 12.21%,
85.37%, 14.33% (as shown in table 3).
The variation of Heavy Metals in Sludge total amount before and after 3 dealing with earthworm of table
| Project | Cd | Cu | Pb | Zn |
| Before dealing with earthworm | 2.24 | 85.31 | 300.27 | 403.44 |
| After dealing with earthworm | It is not detected | 74.89 | 43.93 | 345.63 |
| Reduced rate | 100% | 12.21% | 85.37% | 14.33% |
Embodiment 4
The present embodiment and the difference of embodiment 3 be only that, 50 deficits love victory earthworms will be inoculated in embodiment 3 replace with and connect
100 compatriots of kind love victory earthworms.By dealing with earthworm, Heavy Metal Level In Sludge is accordingly decreased, heavy metal Cd, Cu, Pb,
Zn content reduces by 100%, 22.41%, 86.96%, 25.3% (as shown in table 4) than originally respectively.
The variation of Heavy Metals in Sludge total amount before and after 4 dealing with earthworm of table
| Project | Cd | Cu | Pb | Zn |
| Before dealing with earthworm | 2.24 | 85.31 | 300.27 | 403.44 |
| After dealing with earthworm | It is not detected | 63.86 | 39.15 | 301.37 |
| Reduced rate | 100% | 22.41% | 86.96% | 25.3% |
Comparative example
This comparative example carries out compost in the way of volume ratio 6:4 using Xinyang sewage treatment plant dewatered sludge and leaf
Processing forms mixture (carbon-nitrogen ratio of mixture is 20:1), and according to every kilogram of sludge seeding, 50 compatriots like victory earthworm, processing
After 20 days, earthworm is separated, then carries out During High-Temperature Composting processing, ventilation quantity 0.3m3/min.m3, ventilation time is every 6
Hour ventilation 15min, compost temperature were warming up to 56.3 DEG C at the 5th day and ferment, and 56.3 DEG C ferment 3 days.Treated with much money
Belong to Cd, Cu, Pb, Zn content reduces by 55.78%, 8.82%, 72.00%, 10.13% (as shown in table 5) than originally respectively.
The variation of dealing with earthworm front and back Heavy Metals in Sludge total amount in 5 comparative example of table
| Project | Cd | Cu | Pb | Zn |
| Before dealing with earthworm | 3.35 | 127.89 | 436.91 | 605.12 |
| After compost treatment | 1.48 | 116.61 | 122.33 | 543.82 |
| Reduced rate | 55.82% | 8.82% | 72.00% | 10.13% |
Table 1,2,3,4,5, which can be seen that method for sludge treatment of the invention, in comparison can significantly reduce the content of heavy metal,
Effect is substantially better than comparative example, can reach the purpose of sewage sludge harmlessness, recycling.
Claims (8)
1. a kind of method for sludge treatment, characterized by the following steps:
(1) sludge is mixed to carbon-nitrogen ratio 20:1~30:1 with leavening agent and forms mixture；
(2) mixture is subjected to the sludge fermentation product that ferments to obtain at 50 DEG C or more；
(3) cooling makes sludge fermentation product temperatur be down to 35 DEG C hereinafter, earthworm is inoculated into progress biology in sludge fermentation product
Processing.
2. method for sludge treatment according to claim 1, it is characterised in that: leavening agent described in step (1) be rice husk,
One or more of sawdust, dry branches and fallen leaves.
3. method for sludge treatment according to claim 1, it is characterised in that: the time of fermentation described in step (2) is 5
More than it.
4. method for sludge treatment according to claim 1, it is characterised in that: fermentation described in step (2) is aerobic hair
Ferment.
5. method for sludge treatment according to claim 1 or 4, it is characterised in that: in fermentation process described in step (2)
Ventilation quantity be 0.3~0.5m3/min.m3。
6. method for sludge treatment according to claim 1, it is characterised in that: earthworm described in step (3) is compatriot's love
Win earthworm.
7. method for sludge treatment according to claim 1, it is characterised in that: the quantity that earthworm is inoculated in step (3) is every
Kilogram 50~200 earthworms of sludge seeding.
8. method for sludge treatment according to claim 1, it is characterised in that: the time of biological treatment described in step (3)
It is 20~30 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811393391.2A CN109399881A (en) | 2018-11-21 | 2018-11-21 | A kind of method for sludge treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811393391.2A CN109399881A (en) | 2018-11-21 | 2018-11-21 | A kind of method for sludge treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109399881A true CN109399881A (en) | 2019-03-01 |
Family
ID=65474437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811393391.2A Pending CN109399881A (en) | 2018-11-21 | 2018-11-21 | A kind of method for sludge treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109399881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407613A (en) * | 2019-08-15 | 2019-11-05 | 济南大学 | Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge |
| CN110563492A (en) * | 2019-08-29 | 2019-12-13 | 广东清大同科环保技术有限公司 | Dried sludge organic fertilizer and preparation method thereof |
| CN112794747A (en) * | 2021-02-05 | 2021-05-14 | 河源安乔农业发展有限公司 | Grass and wood fertilizer based on sludge nutrient soil and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705098A1 (en) * | 1977-02-08 | 1978-08-10 | Wolfgang Prof Dr Ing Baader | METHOD FOR TREATMENT OF ANIMAL EXCREMENTS AND SLEUCY |
| JPS54149260A (en) * | 1978-05-13 | 1979-11-22 | Sankyo Eijienshii Kk | Seeding agent and method of disposing sewage |
| JPS5617697A (en) * | 1979-07-25 | 1981-02-19 | Shigeo Fujimoto | Sludge treatment method by earthworm castings |
| CN101913924A (en) * | 2010-07-20 | 2010-12-15 | 邱玛丽 | Method for producing functional ecological compound organic fertilizer by using municipal sludge |
| CN106927872A (en) * | 2016-12-15 | 2017-07-07 | 苏州润弘贸易有限公司 | The method of the sludge aerobic compost after city domestic sewage treatment |
-
2018
- 2018-11-21 CN CN201811393391.2A patent/CN109399881A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705098A1 (en) * | 1977-02-08 | 1978-08-10 | Wolfgang Prof Dr Ing Baader | METHOD FOR TREATMENT OF ANIMAL EXCREMENTS AND SLEUCY |
| JPS54149260A (en) * | 1978-05-13 | 1979-11-22 | Sankyo Eijienshii Kk | Seeding agent and method of disposing sewage |
| JPS5617697A (en) * | 1979-07-25 | 1981-02-19 | Shigeo Fujimoto | Sludge treatment method by earthworm castings |
| CN101913924A (en) * | 2010-07-20 | 2010-12-15 | 邱玛丽 | Method for producing functional ecological compound organic fertilizer by using municipal sludge |
| CN106927872A (en) * | 2016-12-15 | 2017-07-07 | 苏州润弘贸易有限公司 | The method of the sludge aerobic compost after city domestic sewage treatment |
Non-Patent Citations (2)
| Title |
|---|
| 曲格平等: "《城市环境污染与防治 85年亚太地区城市环境会议录综述》", 30 November 1989, 中国环境科学出版社 * |
| 杨卓等: "《重金属污染土壤的植物修复及其强化技术研究》", 31 July 2014, 吉林人民出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407613A (en) * | 2019-08-15 | 2019-11-05 | 济南大学 | Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge |
| CN110563492A (en) * | 2019-08-29 | 2019-12-13 | 广东清大同科环保技术有限公司 | Dried sludge organic fertilizer and preparation method thereof |
| CN112794747A (en) * | 2021-02-05 | 2021-05-14 | 河源安乔农业发展有限公司 | Grass and wood fertilizer based on sludge nutrient soil and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101983952B (en) | Method for producing organic fertilizer by using municipal sewage sludge | |
| Shabir et al. | Treatment technologies for olive mill wastewater with impacts on plants | |
| CN102381822A (en) | Multi-strain compound microbial high-temperature rapid-digestion sludge harmless treatment method | |
| CN101045650A (en) | Restoration of polluted soil using activity sludge and biomass waste material | |
| CN102010109A (en) | Application of bio-enzyme catalysis in residual sludge treatment | |
| Manyi-Loh et al. | Microbial anaerobic digestion: process dynamics and implications from the renewable energy, environmental and agronomy perspectives | |
| CN102085530A (en) | Microbial ecological regulation method for repairing petroleum polluted saline-alkali soil | |
| CN101289637B (en) | Method for preparing clean fuel derived from sludge | |
| CN110885176A (en) | Method for treating and disposing sludge by utilizing microbial flocculant and microbial wall breaking | |
| CN105384474B (en) | A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain | |
| CN109399881A (en) | A kind of method for sludge treatment | |
| CN107245462A (en) | A kind of high temperature resistant deodorizing and nitrogen protecting fermentation organic fertilizer microbial inoculum and preparation method thereof | |
| CN107879580A (en) | A kind of method using dealing with earthworm domestic sludge | |
| Ansari et al. | Additive facilitated co-composting of lignocellulosic biomass waste, approach towards minimizing greenhouse gas emissions: an up to date review | |
| CN114988926A (en) | Organic compound fertilizer produced by eighty percent of sludge with water content and manufacturing method thereof | |
| CN114988965A (en) | Sludge and derivative with water content of eighty percent treated at high speed and preparation method thereof | |
| CN110316921A (en) | A method of domestic sludge is disposed using superhigh temperature aerobic microbiological fermentation process | |
| JP2009291782A (en) | Treatment method of organic substance | |
| CN116332680A (en) | Kitchen waste biogas residue composting-pyrolysis co-treatment method | |
| CN104163664A (en) | Method for preparing solid-state bioorganic fertilizer by taking sludge as raw material | |
| Pandey et al. | Microbiological monitoring in the biodegradation of food waste | |
| CN106310922A (en) | Microorganism deodorant for solid household garbage | |
| CN106310923A (en) | Biological active enzyme composite microbial deodorizer | |
| CN112919758A (en) | Method for purifying sludge by using earthworms and application of method in soil remediation | |
| CN106512707A (en) | Microbial deodorizer with complex photosynthetic bacteria and bioactive enzyme |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190301 |