CN101143797A - Method for preparing sludge organic fertilizer from high moisture percentage sludge - Google Patents
Method for preparing sludge organic fertilizer from high moisture percentage sludge Download PDFInfo
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- CN101143797A CN101143797A CNA200710009455XA CN200710009455A CN101143797A CN 101143797 A CN101143797 A CN 101143797A CN A200710009455X A CNA200710009455X A CN A200710009455XA CN 200710009455 A CN200710009455 A CN 200710009455A CN 101143797 A CN101143797 A CN 101143797A
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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
- 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 of preparing organic sludge manure, which utilizes hight water-absorption resin to improve the sludge performance and increase the composting of sludge with high water content. High water-absorption resin conditioner accounting for one to two point five percent of the weight of the sludge and carbonaceous conditioner accounting for three to ten percent of the weight of the sludge are added into the sludge with high water content, which is discharged by the sewage treatment plants of a city, and the sludge is dumped into a dedicated fermentor, and after being uniformly mixed, undergoes composting fermentation. In the course of fermentation, the fermentation temperature is controlled in a range of thirty five to sixty five DEG C, the sludge is intervalically stired and ventilated, the composting lasts twenty to thirty two days, and therefore an organic sludge manure product is prepared. The invention introduces the high water-absorption resin as the sludge compost conditioner for the first time, and the added high water-absorption resin realizes the aerobic compost of the sludge with high water content and promotes the process of sludge composting. Meanwhile, the traditional desiccation process of sludge compost is left out, as a result, the process is simplified, the preparation cost is low, and the content of organic matters and nitrogen is high.
Description
Technical field
The present invention relates to a kind of sludge composting technology, particularly relate to a kind of super absorbent resin that utilizes and improve the method that mud performance raising high water content sludge composting prepares the mud fertilizer.
Background technology:
Mud (Sludge) is a kind of water ratio height (the liquid sludge water ratio can reach 99%), be the flow-like material of black or chocolate, generally the aggregate formed of the zoogloea that is formed by multiple microorganism and its adsorbed organic matter and inorganics.Mud is mainly derived from municipal sludge (Civil sludge, also be sewage sludge Sewage sludge,), pipe network mud, river and lake silt, industrial sludge, municipal sludge particularly, along with urbanization develops rapidly, urban sewage treatment system perfect, municipal sludge becomes a class mud of quantity maximum, becomes the key influence factor that urban construction and urban sewage treatment system are normally moved.Mud is the water ratio height not only, perishable, strong odor is arranged, also concentrated nutritive element, heavy metal and salt such as most organic matter, nitrogen phosphorus in the sewage, and a spot of pathogenic micro-organism and parasitic ovum etc., if not by rational treatment and disposal, these pollutents will directly enter environment, influence the appearance of the city, polluted-water and soil, even be detrimental to health.At present, the treatment and disposal of mud has become one of focus that environmental protection circle and municipal administration very pay close attention to.
Sludge compostingization is to rely on microorganisms such as bacterium in the mud, actinomycetes, fungi under certain artificial condition, controlledly promotes the Biochemical processes that biodegradable organism transforms to stable soil ulmin.Mud is through compost treatment, and volume generally can be reduced to 50%～70% of original volume, and most of pathogenic bacteria and virus are killed.Mud is through behind the compost, the finished product that makes is called compost (Compost), it is that a class is brown, the very high bulk material of humus content as the peat, so be also referred to as " vegetable mould ", its stable in properties, can be used as soil improvement agent and carry out the soil utilization, realize the recycling of nutritive elements such as carbon source, nitrogen phosphorus in the mud.Therefore sludge compostingization is to realize sludge reduction, innoxious, stabilization and the comparatively effective a kind of treatment process of resource utilization.
Sludge compostingization can be divided into two kinds of anaerobic composting and aerobic composts by principle.Advantages such as aerobic compost is fast because of organism speed, and it is more abundant to degrade, and the compost cycle is short, and envrionment conditions is better and widespread use.Aerobic composting process has been worked as maturation at present, according to having or not fermentation unit compositing system simply can be divided into open system and reactor assembly, the former can be divided into natural ventilation bar buttress formula system, passive air duct slats buttress system, forced ventilation static buttress system composting process again.
Yet sludge compostingization still exists certain problem to remain solution, mainly comprise: (1) moisture percentage in sewage sludge is too high, mud water ratio after processed generally still reaches 82%, and the suitable water ratio of sludge aerobic compost process is 50-65%, mud need pass through mummification, add a large amount of pre-treatment such as amendment before the compost, this brings difficulty to practical engineering application, increases the expense of sludge composting; (2) there be the loss, particularly nitrogen of nutritions such as nitrogen, phosphorus in composting process, loses in a large number with volatilization and the filtrate loss form of N; (3) having certain heavy metal contamination in the mud, is one of key factor of restriction sludge composting soil utilization.
Super absorbent resin water absorbent rate height, structure properties are stablized, and be nonpoisonous and tasteless, carries out the soil utilization as soil improvement agent, water-loss reducer of soil in a large number.After being applied to soil, not only has drought-resistant water-preserving soil moisture conservation effect, the conserve water resource, can also promote the formation of soil aggregate, has the structure of improving the soil, protect effects such as fertilizer, raising fertilizer efficiency, promotion crop growth, simultaneously from the super absorbent resin structure, it is expected to the sequestrant as heavy metal ion.Problems such as moisture percentage in sewage sludge height, the heavy metal content height that exists in view of the utilization of sludge composting soil, fertilizer efficiency is on the low side, propose to adopt the interpolation auxiliary material of super absorbent resin as sludge composting, expectation utilizes the characteristic of super absorbent resin to solve existing problem in the sludge composting process, on the one hand, problem at the high unfavorable compost of moisture percentage in sewage sludge, utilize the high water absorbing capacity of super absorbent resin, reduce moisture percentage in sewage sludge, improvement mud structure, improve the mud voidage, and then satisfy the demand of sludge aerobic compost to oxygen, promote the sludge composting process; On the other hand, the problem of nutrient loss in, the composting process low at the mud fertilizer efficiency, the nutrient preserving capability that utilizes super absorbent resin is nutrients such as nitrogen, phosphorus, potassium in the mud fixedly, reduce fertilizer efficiency loss in the sludge composting process, improve the fertilizer efficiency of sludge composting; In addition, storage effect at heavy metal content in the mud and form distribution, utilize carboxyl in the super absorbent resin (COOH), hydroxyl (heavy metal in the suction group chelating absorption mud such as OH), improve heavy metal stability in the mud, alleviate the heavy metal pollution problem that the utilization of mud soil exists.
Summary of the invention
The object of the present invention is to provide a kind of super absorbent resin that in mud, adds to carry out aerobic compost, the method for preparing soil particle fertilizer, to realize the aerobic compost of high water content sludge, improve the sludge composting benefit, improve sludge composting product fertilizer efficiency and reduce sludge composting product heavy metal contamination risk.
For realizing that the technical scheme that purpose of the present invention adopts is: the high-moisture mud that the municipal sewage plant discharges, add and account for 1.0%～2.5% super absorbent resin amendment of mud weight and the carbonaceous amendment of 3-10%, pour in the fermenting jar the fertile fermentation of the laggard windrow that stirs into.Control leavening temperature between yeast phase between 35～65 ℃, and carry out intermittence stirring and ventilation, compost promptly was prepared into the mud organic fertilizer product about 30 days.After conventional granulation, can be prepared into the organic granular fertilizer that uses for the field.
Mud of the present invention is the mud through the preliminary hydro-extraction processing of municipal sewage plant, and its water content is between 75～95%.
Super absorbent resin amendment of the present invention is meant sodium polyacrylate or polyacrylic acid potassium etc.
Carbonaceous amendment of the present invention refers to wood chip, sawdust, bamboo silk, rice hulls or bagasse etc.
Intermittence of the present invention stirs and ventilation is meant: between yeast phase every 12 hours startup gas blowers once, each air blast 10min, flow is between 15～50L/min; Once stir every 24 hours actuating motors, stir 10min at every turn, left and right sides compost finished in 28～32 days, opened compost jar discharging, the discharging pack.
Fermenting jar of the present invention is meant the turnover air control system for air that includes gas blower and vacuum air pump formation, the stirring system that electric motor, connecting rod, stirring blades constitute, the fermentor tank system of interior tank body and the nestable formation of outer tank body, the heating temperature controlling system that asbestos, temperature inductor, well heater and temperature-adjusting circuit constitute constitutes, and wherein: gas blower links to each other with device by the air-supply pipeline with vacuum suction; Electric motor is positioned at the device top, and stirring blades is positioned at the fermentation tank interior, and links to each other with electric motor by connecting rod; Asbestos, temperature inductor, electric stove wire interior tank body and outside between the tank body.
The present invention introduces super absorbent resin first as the sludge composting amendment, and the super absorbent resin that is added has been realized the high water content sludge aerobic compost, has promoted the sludge composting process.Used super absorbent resin drying, water-absorbent are strong, have certain supporting capacity and heavy metal absorption property, can obviously improve mud particularly high water content sludge performance of ventilating and pore texture, effectively promote the compost process, and the super absorbent resin addition be few, economical and effective, stable performance own, effect is lasting, can not increase the weight of the burden of microorganism organic matter degradation, having effects such as certain water conservation and improvement composting production, raising product fertilizer efficiency, is a kind of comparatively ideal compost amendment.After using super absorbent resin simultaneously, saved the drying and other treatment of traditional sludge compost, simplified technology, preparation cost is low, and organic matter and nitrogen content are higher, and fertilizer efficiency is worth higher, has very good prospects for application.
Adopt the inventive method, with sodium polyacrylate cadmium ion and cupric ion sorptive power masterpiece one are compared, data presentation all has stronger adsorptive power, and strengthens along with the increase of effects of ion concentration, and the two is unary linear relation; When copper ion concentration was 0.005mol/L, the cupric ion clearance reached 100%, and when concentration of cadmium ions was 0.007mol/L, its clearance was 96.10%; In the heavy metal drip washing experiment of mud (cadmium content 5mg/kg) polypropylene acid sodium, when the sodium polyacrylate add-on is lower than 2.4%, increase along with the sodium polyacrylate add-on, it is big that concentration of cadmium ions in each mud post leacheate becomes, continuing increases the sodium polyacrylate add-on, and the concentration of cadmium begins to descend in the leacheate.Therefore introducing super absorbent resin is expected to reduce the heavy metal contamination risk as the sludge composting amendment.
Accompanying drawing and description of drawings
Fig. 1 is a fermenting jar structure synoptic diagram of the present invention.
Among Fig. 1, the 1st, electric motor, the 2nd, the vacuum air pump pipeline, the 3rd, the electric stove wire of heating usefulness, the 4th, the mud that is used to ferment in the fermentation tank body, the 5th, stirring blades, the 6th, the power source circuit controlling box, the 7th, be fixed in the screw rod of outer inner tank wall in the manual sewage discharge device, the 8th, vacuum air pump, the 9th, gas blower, the 10th, latticed flase floor in the manual sewage discharge device, be provided with the sewage discharge control punch therebetween, the 11st, the sewage that water-containing sludge oozes out is discharged, the 12nd, compost discharging, the 13rd, interior tank body, the 14th, outer tank body, the 15th, funnelform sewage sludge feed, the 16th, the asbestos of tank body insulation in being used for.
Embodiment
For the present invention is further understood, now 1 it is made specific description in conjunction with the accompanying drawings.
The fermenting jar is made of turnover air control system for air, stirring system, fermentor tank system, heating temperature controlling system.In the fermentor tank system, interior tank body is that radius is 500mm, highly is about the cylindrical of 1700mm, is made by the steel plate of 3mm thickness; The radius of outer tank body is the nestable formation of 600mm; Sewage sludge feed from outer tank body top 400mm, compost discharging from interior tank base 50mm.The gas blower air output is controlled at 30L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 45 ℃.
Get the mud 500kg of initial aqueous rate 82.15%, add the sodium polyacrylate of 2.5kg, the wood chip of 30kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 70kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 32 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 50L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 45 ℃.
Get the mud 500kg of initial aqueous rate 78.15%, add the polyacrylic acid potassium of 5kg, the wood chip of 50kg, pour charging into, leave standstill 20 minutes after, after discharging the sewage of 65kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 28 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 15L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 35 ℃.
Get the mud 500kg of initial aqueous rate 88.35%, add the polyacrylic acid potassium of 12.5 kg, the bagasse of 15kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 70kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 30 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 40L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 65 ℃.
Get the mud 500kg of initial aqueous rate 78.05%, add the sodium polyacrylate of 10kg, the wood chip of 40kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 67kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 30 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 20L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 45 ℃.
Get the mud 500kg of initial aqueous rate 94.05%, add the polyacrylic acid potassium of 8kg, the bamboo silk of 40kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 79kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 32 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 35L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 40 ℃.
Get the mud 500kg of initial aqueous rate 75.45%, add the sodium polyacrylate of 6kg, the sawdust of 40kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 68kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 29 days, compost finishes, and opens compost jar discharging, the discharging pack.
The fermenting jar is identical with embodiment 1.The gas blower air output is controlled at 40L/min scope built-in motor and is powered by three-phase supply, and the electric stove wire total power is 2000W, and the zone of heating temperature is controlled at 40 ℃.
Get the mud 500kg of initial aqueous rate 89.05%, add the polyacrylic acid potassium of 7kg, the rice hulls of 40kg, pour charging into, leave standstill 20 minutes after, naturally discharge the sewage of 69kg, actuating motor, behind the stirring 20min, standing for fermentation, during this time once, the each air blast and the 10min that bleeds every 12 hours startup vacuum air pumps and gas blower; Once stir every 24 hours actuating motors, stir 10min at every turn, after 30 days, compost finishes, and opens compost jar discharging, the discharging pack.
Claims (6)
1. method of utilizing high water content sludge to prepare the mud fertilizer, it is characterized in that in high-moisture mud, add super absorbent resin amendment and carbonaceous amendment, pour in the fermenting jar, the fertile fermentation of the laggard windrow that stirs is controlled leavening temperature between 35～65 ℃ between yeast phase, and carries out intermittence stirring and ventilation, compost 28～32 days promptly is prepared into the mud fertilizer.
2. high water content sludge according to claim 1 prepares the method for mud fertilizer, it is characterized in that mud of the present invention is the mud through the preliminary hydro-extraction processing of municipal sewage plant, and its water content is between 75～95%.
3. high water content sludge according to claim 1 prepares the method for mud fertilizer, it is characterized in that described super absorbent resin amendment is meant sodium polyacrylate or polyacrylic acid potassium, and its consumption accounts for 1.0%～2.5% of mud weight.
4. high water content sludge according to claim 1 prepares the method for mud fertilizer, it is characterized in that described carbonaceous amendment refers to wood chip, sawdust, bamboo silk, rice hulls or bagasse, and its consumption accounts for 3～10% of mud weight.
5. high water content sludge according to claim 1 prepares the method for mud fertilizer, it is characterized in that described intermittence stirring is meant: once stir every 24 hours actuating motors, stir 10min at every turn.
6. high water content sludge according to claim 1 prepares the method for mud fertilizer, it is characterized in that described intermittence ventilation is meant: every 12 hours startup gas blowers once, each air blast 10min, flow is between 15～50L/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200710009455XA CN101143797A (en) | 2007-08-30 | 2007-08-30 | Method for preparing sludge organic fertilizer from high moisture percentage sludge |
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| CNA200710009455XA CN101143797A (en) | 2007-08-30 | 2007-08-30 | Method for preparing sludge organic fertilizer from high moisture percentage sludge |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020407A (en) * | 2010-12-27 | 2011-04-20 | 河海大学 | Method for rapid dehydration of sludge |
| CN102476965A (en) * | 2010-11-25 | 2012-05-30 | 沈阳科健生物技术有限公司 | Biological organic fertilizer and method for preparing the biological organic fertilizer by fermentation of municipal sludge |
| CN102884011A (en) * | 2009-12-24 | 2013-01-16 | Bcr环境公司 | Improved digestion of biosolids in wastewater |
| CN103619499A (en) * | 2011-05-19 | 2014-03-05 | 株式会社泰科企划 | Method for processing organic waste and system for processing organic waste |
| CN104098404A (en) * | 2014-08-13 | 2014-10-15 | 邓万超 | Special bagasse long-acting organic compound fertilizer for lychees and production method thereof |
| CN104535397A (en) * | 2015-01-23 | 2015-04-22 | 中国矿业大学 | Configuration device and method for clayey soil samples with specific moisture content |
| CN105910862A (en) * | 2016-04-12 | 2016-08-31 | 安徽理工大学 | Configuration apparatus for soil sample specific water content |
| CN105948866A (en) * | 2016-05-17 | 2016-09-21 | 临安晨熙水利科技有限公司 | Method for preparing humus organic fertilizer from pond silt and sewage treatment plant sludge |
| CN106966773A (en) * | 2017-04-28 | 2017-07-21 | 华南理工大学 | A kind of method that sludge aerobic compost is carried out using stalk sludge matrix activated carbon |
| CN107298630A (en) * | 2017-06-16 | 2017-10-27 | 上海禾绿生物有机肥有限公司 | A kind of manufacture craft of the special compound fertilizer of biological organic |
| CN105237051B (en) * | 2015-11-18 | 2018-09-07 | 哈尔滨工业大学 | A method of using beet pulp as conditioner organic fertilizer is prepared using sludge composting |
| CN110606788A (en) * | 2019-10-29 | 2019-12-24 | 新疆水处理工程技术研究中心有限公司 | Organic fertilizer and preparation method thereof |
| CN110606573A (en) * | 2019-09-17 | 2019-12-24 | 武汉工程大学 | Method for treating high-difficulty wastewater by utilizing solid-state fermentation technology |
| CN114315470A (en) * | 2022-01-26 | 2022-04-12 | 杨井科 | Drought-resistant organic fertilizer and preparation method thereof |
| CN115286213A (en) * | 2022-09-01 | 2022-11-04 | 中海石油环保服务（天津）有限公司 | Water-fluffy porous material for treating oil sludge biological pile |
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2007
- 2007-08-30 CN CNA200710009455XA patent/CN101143797A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884011A (en) * | 2009-12-24 | 2013-01-16 | Bcr环境公司 | Improved digestion of biosolids in wastewater |
| CN102476965A (en) * | 2010-11-25 | 2012-05-30 | 沈阳科健生物技术有限公司 | Biological organic fertilizer and method for preparing the biological organic fertilizer by fermentation of municipal sludge |
| CN102020407A (en) * | 2010-12-27 | 2011-04-20 | 河海大学 | Method for rapid dehydration of sludge |
| CN103619499A (en) * | 2011-05-19 | 2014-03-05 | 株式会社泰科企划 | Method for processing organic waste and system for processing organic waste |
| CN103619499B (en) * | 2011-05-19 | 2015-03-25 | 株式会社泰科企划 | Method for processing organic waste and system for processing organic waste |
| CN104098404A (en) * | 2014-08-13 | 2014-10-15 | 邓万超 | Special bagasse long-acting organic compound fertilizer for lychees and production method thereof |
| CN104098404B (en) * | 2014-08-13 | 2016-08-24 | 邓万超 | Lichee long-acting special compoiste fertilizer that a kind of bagasse is made and preparation method thereof |
| CN104535397A (en) * | 2015-01-23 | 2015-04-22 | 中国矿业大学 | Configuration device and method for clayey soil samples with specific moisture content |
| CN105237051B (en) * | 2015-11-18 | 2018-09-07 | 哈尔滨工业大学 | A method of using beet pulp as conditioner organic fertilizer is prepared using sludge composting |
| CN105910862A (en) * | 2016-04-12 | 2016-08-31 | 安徽理工大学 | Configuration apparatus for soil sample specific water content |
| CN105910862B (en) * | 2016-04-12 | 2018-07-17 | 安徽理工大学 | A kind of configuration device of the specific moisture content of soil sample |
| CN105948866A (en) * | 2016-05-17 | 2016-09-21 | 临安晨熙水利科技有限公司 | Method for preparing humus organic fertilizer from pond silt and sewage treatment plant sludge |
| CN106966773A (en) * | 2017-04-28 | 2017-07-21 | 华南理工大学 | A kind of method that sludge aerobic compost is carried out using stalk sludge matrix activated carbon |
| CN107298630A (en) * | 2017-06-16 | 2017-10-27 | 上海禾绿生物有机肥有限公司 | A kind of manufacture craft of the special compound fertilizer of biological organic |
| CN110606573A (en) * | 2019-09-17 | 2019-12-24 | 武汉工程大学 | Method for treating high-difficulty wastewater by utilizing solid-state fermentation technology |
| CN110606788A (en) * | 2019-10-29 | 2019-12-24 | 新疆水处理工程技术研究中心有限公司 | Organic fertilizer and preparation method thereof |
| CN114315470A (en) * | 2022-01-26 | 2022-04-12 | 杨井科 | Drought-resistant organic fertilizer and preparation method thereof |
| CN115286213A (en) * | 2022-09-01 | 2022-11-04 | 中海石油环保服务（天津）有限公司 | Water-fluffy porous material for treating oil sludge biological pile |
| CN115286213B (en) * | 2022-09-01 | 2024-04-16 | 中海石油环保服务（天津）有限公司 | Water-meeting fluffy porous material for treating sludge biological pile |
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