CN102875210A - Method for co-composting of blue-green algae and polluted bottom sediment - Google Patents

Method for co-composting of blue-green algae and polluted bottom sediment Download PDF

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Publication number
CN102875210A
CN102875210A CN2012104371444A CN201210437144A CN102875210A CN 102875210 A CN102875210 A CN 102875210A CN 2012104371444 A CN2012104371444 A CN 2012104371444A CN 201210437144 A CN201210437144 A CN 201210437144A CN 102875210 A CN102875210 A CN 102875210A
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blue
green algae
bed mud
compost
polluted
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CN2012104371444A
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Chinese (zh)
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周立祥
周俊
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南京农业大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The invention relates to a technology for co-composting of blue-green algae and polluted bottom sediment, and belongs to the technical field of environmental engineering. The technology comprises the following steps: at first, heavy metal in the polluted bottom sediment is removed by adopting a bioleaching technology, then blue-green algae and the polluted bottom sediment are mixed, the physicochemical property of the mixture of the blue-green algae and the bottom sediment is regulated to the condition needed by growth of aerobic fermentation microorganisms through adopting conditioners such as straws, rice husks, bran, spent mushroom composts, dregs of decoctions, wood chips and the like by means of the characteristics of high water content of the blue-green algae and C/N ratio imbalance and the like, a certain quantity of nitrogen conserving agents is added, and then a forced ventilation fermentation manner is adopted in a compost factory, the temperature of the compost is increased to be more than 60 DEG C within an extremely short time, the high-temperature fermentation period is kept for about 15 days, and the compost is transferred in a secondary fermentation zone till the compost is decomposed thoroughly after the high-temperature fermentation period is ended. The technology achieves the cleanness of the polluted bottom sediment and large-scale treatment of the quick composting of blue-green algae and the polluted bottom sediment, and combines the harmlessness and the reclamation of the algae and the polluted bottom sediment organically.

Description

A kind of blue-green algae and polluted bed mud be the method for compost altogether

One, technical field

The present invention relates to the method for a kind of blue-green algae and polluted bed mud hybrid composting, is the technology of the innoxious and federated resource of a kind of blue-green algae and polluted bed mud, belongs to field of environment engineering technology.

Two, background technology

In recent years, China's body eutrophication is more serious, and take Dian Chi and Taihu Lake as strong, body eutrophication causes blue-green algae to be broken out in a large number especially, salvages at present the most efficiently method of Crises of blue-green alge bloom that solves that is still.Take in Taihu Lake as example, during the Blue-green Algae Fast Growth, the bloom blue algae of salvaging every day surpasses 1000t, can reach 2000t at most.Though blue-green algae contains the algae toxin, also contain the nutrition such as rich in protein and nitrogen, phosphorus, have the potentiality of recycling.Therefore, how these blue-green algaes of being salvaged out for the treatment of and disposal are one of the key issues that should consider when administering body eutrophication.

At present, for extractive technique and the function of blue-green algae functional active components carried out large quantity research both at home and abroad, and have made some progress, but also all failed to realize commercially producing.Innoxious and the resource technology intellecture property retrieval to relevant domestic and international blue-green algae, its main result is as follows: patent No. ZL200410012803.5 (publication number is CN1243692C bloom blue algae Chemical Mixed Fertilizer and preparation method) report all is mixed bloom blue algae powder and urea, calcium superphosphate, monoammonium phosphate, vitriolate of tartar by a certain percentage, then makes organic-inorganic compound fertilizer through granulation.But the blue algae powder that this patent is used is processed without thermophilic fermentation, and the algae toxin is difficult to eliminate, and because blue-green algae is not become thoroughly decomposed, affects fertilizer efficiency.Patent No. ZL200410012933.9 (CN1562943, a kind of method of extracting gamma-linoleic acid from blue algae in water bloom) has discussed and extracted the linoleic technology of utilizing from blue-green algae.How residue after the extraction disposes this technology does not relate to.Patent No. ZL200410012934.3 (CN1563083, a kind of method of preparing phycocyanin from blue algae in water bloom) and patent No. ZL200410012927.3 (CN1563100, a kind of method of utilizing bloom blue algae to extract polysaccharide) how to have set forth respectively preparation Phycocyanins, C-and polysaccharide from blue-green algae.These patents problem with to extract linoleic patent identical.

On the other hand, body eutrophication also can cause silting speed to increase except meeting causes blue algae bloom.Mud had both contained a certain amount of organism and N, P nutrient, also can accumulate heavy metal and persistence organic pollutant, can to water body in lake releasing nutrients salt and heavy metal etc., cause Re-pollution and the blue algae bloom of water body as not administering it.Taihu Lake lakebed ubiquity mud is mainly derived from and contains the sewage that enriches suspended substance and pollutent around the lake and enter.Survey data shows: Taihu Lake Shi Bawan props up the following all severe siltation of the fluid stream channel water surface, the average about 1.2m of deposit depth, and the innermost of wherein depositing is that Yang Wan enters the exit of a lake and reaches 2.0m, the river course 1.8m of restaurant, Taihu Lake.Depositing the most serious is Yao Wan~dish arm of lake section, and river water level normal flooding area in tributary is to the water surface length that enters exit of a lake accumulative total overall length 1222m, and only surplus about 200m grows at present, has silted 5/6ths more than up.In recent decades, grade of Taihu Lake water quality decline in average per ten years, Wu Lihu is that it pollutes one of the most serious waters.After 1998, this Lake Water is V class and bad V class, is in serious eutrophication.And according to Taihu Lake office of Ministry of Water Resources investigation, the local lake area bed mud organic matters such as Taihu Lake Wu Lihu, Zhu Shanhu, Mei Lianghu, Gong Hu, total phosphorus, three index content of total nitrogen are all higher, and are in release conditions, and heavy metal also has relative higher phenomenon with organic pollutant.Total arsenic scope is 4.23~23.0mg/kg in the bottom mud in Taihu Lakes in 2004; The total mercury scope is 0.05~0.27mg/kg; Total chromium scope is 9.7~63.6mg/kg; Total plumbous scope is 14.7~73.5mg/kg; Total cadmium scope is 0.26~0.92mg/kg; Total copper scope is 17.1~155mg/kg.Wherein the maximum value of five li lake stratified substrate sludge heavy metal content surpasses 0.83 times-3.03 times of national soil environment quality grade III Standards.6 kinds of common polychlorinated biphenyl congener PCB28, PCB52, PCB101, PCB138, PCB153, PCB180 detects in bottom mud in Taihu Lake.That wherein content is the highest is PCB52, average out to 0.983 μ g/kg.Although PCBs content is not high in the bed mud, can enrichment in bottom-dwelling, and transmit step by step by food chain, thereby its potential hazardness still can not be ignored.It should be noted that some section in Taihu Lake owing to be subjected to the waste water chronic pollution such as textile printing and dyeing, chemical industry waste water, IT industry, heavy metal and toxic organics content increase by a fairly big margin in the bed mud.Therefore, how to carry out " detoxification " for those heavily contaminated bed muds that polluted by heavy metal or other POPs and process, then going recycling according to the physico-chemical property of mud is a crucial difficult problem that needs to be resolved hurrily during mud is administered again.

Through patent retrieval, mud desilting and processing aspect at present existing patent comprise: administer the method (ZL01132079.6) of the polluted sludge in city and outskirts river, the method is a kind of landfill disposal in essence; A kind of process for treating sludge (application number: 200710067267.2), require 200 ℃ high temperature.For the bed mud resource utilization, Japan produces the senior building material with bed mud, because the fragment of brick good permeability of making take bed mud as main raw material is lightweight, rich color is suitable for the finishing material of buildings very much; The method that the U.S. processes bed mud is directly with the bed mud heated drying and add mineral manure and other texture modifiers and make granular, as nitrogen, the abundant Fertilizer application of phosphorus equal size, but the method can not be controlled effectively to the heavy metal contamination in the bed mud that contains heavy metal contamination.

In recent years, its dehydration, stripping heavy metal, the effect of removing stink and killing pathogen are found to utilize the liquid mud of bioleaching technology (Bioleaching) pre-treatment to have and are promoted in research.If some patent (ZL02137921.1 of the bioleaching technology that the effect that utilizes microbial host acidophilia thiobacillus removes heavy metal in dirty (silts) mud (Bioleaching, in the past also title " bioleaching " or " bioleaching ") had once invented in this seminar; ZL02112924.X; ZL200410014801.X; ZL200410044843.8; ZL200520072316.8), the result shows, the bioleaching technology has the stripping Heavy Metals in Sludge, kill pathogen in the mud and promote effect in the sludge dewatering, through the mud that can obtain cleaning after the dehydration, and this technology has and does not consume that acid, running cost are low, leaching ability of heavy metal efficient high the incomparable advantages of chemical extraction method such as (can up to more than 90%), non-secondary pollution, has a extensive future.Potentiality in view of blue-green algae and polluted bed mud recycling, the present invention at first adopts the bioleaching technology that the high bed mud of heavy metal content is carried out detoxification treatment, then with concentrated, dehydration after the blue-green algae allotment after carry out high temperature aerobic composting, redevelop into various high value-added products, realize blue-green algae and the utilization of polluted bed mud federated resource.

Three, summary of the invention

Technical problem

The object of the invention is to provide the method for a kind of blue-green algae and the utilization of polluted bed mud federated resource.The blue-green algae water ratio is high, contain a large amount of algae toxin, and C/N exists the pollution problem of heavy metal than serious imbalance in the bed mud, and these limiting factors have had a strong impact on the recycling of blue-green algae and bed mud.The present invention at first adopts the bioleaching technology that the bed mud that pollutes is carried out detoxification treatment, then with carrying out high temperature aerobic composting after the blue-green algae mud allotment after the cleaning mud after the detoxification and the dehydration, can realize deodorizing, stabilization, degraded algae toxin simultaneously, kill the harmless treatments such as pathogenic bacteria and weed seed, redevelop into various high value-added products, realize the innoxious and federated resource utilization of blue-green algae and polluted bed mud, have good economic benefit and environmental benefit.

Technical scheme

The present invention relates to polluted bed mud bioleaching harmless treatment-bed mud and dehydration blue-green algae associating composting process flow process, as shown in Figure 1, mainly consist of the following components:

1. the leaching of the heavy metal in the polluted bed mud

The bacterial strain that is used for the heavy metal polluted bed mud bioleaching is the isolated bioleaching microorganism of this testing laboratory, be mainly acidophilia thiobacillus Acidithiobacillus ferrooxidans LX5 and Acidithiobacillus thiooxidans TS6, the patent No. is respectively ZL02112924.X and ZL02137921.1.Ultimate principle is to add the bioleaching microorganism in the bed mud mud of reaction tank, process certain hour Air Exposure is (after 24~48h), pass through biological oxidation, heavy metal in the mud more than 80% is dissolved, and mud energy natural biology flocculation concentration, under the condition that does not add any flocculation agent, but Direct Dehydration becomes very dried " cleaning " bed mud and organic nutrient not lose.Simultaneously, through after this processing not only heavy metal be removed and also bed mud without any stench.Concrete operation steps is at first will tame good bioleaching microorganism (microbe density is approximately 10 7~10 8CFU/mL) ratio in bed mud volume 10% joins in the reactor that bed mud is housed, under aerobic, middle temperature (28 ℃~35 ℃), stirring (gas agitating or mechanical stirring) condition, cultivate 48h, biological oxidation and biological acidification effect by microorganism descend sludge system pH, thereby make a large amount of strippings of heavy metal in the polluted bed mud, the bed mud that obtains cleaning by the filter press dehydration at last.

2. bed mud and blue-green algae are united composting technology

The technology key step of associating compost is as follows:

(1) bed mud of the cleaning after the detoxification in 1 and the blue-green algae after the dehydration are as raw material, a certain amount of material that becomes thoroughly decomposed of reuse is as bacterial classification and siccative, add a certain amount of amendment according to features such as the water content in bed mud and the blue-green algae, C/N compare, with the water ratio of blue-green algae after bed mud and the dehydration transfer to about 60%, the C/N ratio transfers to 25-30:1.

(2) on the basis of processing (1), for nitrogen loss in the composting process and the serious characteristics of bad-smell problem, the nitrogen volatilization and the stink that add in a certain amount of nitrogen protecting agent inhibition composting process produce.

(3) will carry out compost fermentation in the ventilating fermentation workshop through the material after (2) step process, timing turning and sampling and measuring index of correlation, fermentation period is about 20 days.

(4) will change through the material after (3) step process the Secondary Fermentation workshop over to and carry out static bar buttress formula fermentation, and no longer change until the leavening temperature of fermentation materials is down to envrionment temperature, water ratio further is down to below 30%, the material that is become thoroughly decomposed fully.

What the amendment in the step (1) referred to can be the mixture of wherein one or more such as stalk, rice husk, wheat bran, mushroom residue, the dregs of a decoction, wood chip.Nitrogen protecting agent in the step (2) refers to the mixed solution of acidifying zeolite, calcium superphosphate and magnesium hydroxide and phosphoric acid etc.

To the material that becomes thoroughly decomposed after the compost end, the standard relevant according to country can be developed further into multi-functional high added value fertilizer or compound organic and inorganic fertilizer etc.

Beneficial effect

The present invention compares with traditional technology has following advantage:

Employing bioleaching technology has been carried out harmless treatment to the bed mud of heavy metal contamination, has obtained the bed mud of cleaning, then unites thermophilic fermentation with the blue-green algae of dehydration, obtains containing rich eutrophic fertilizer.

For existing physical behavior poor in blue-green algae and the bed mud During High-Temperature Composting, C/N is than characteristics such as imbalances, add targetedly stalk, rice husk, wheat bran, mushroom residue, the dregs of a decoction, amendment with various combinations such as wood chips, effectively improved the physico-chemical property of blue-green algae and bed mud, make blue-green algae and bed mud reach at short notice the thermophilic fermentation phase, and the time that can keep for a long time thermophilic fermentation, Effective Raise fermenting speed, shortened fermentation period, having reached blue-green algae and bed mud rapidly composting processes, reduce simultaneously the moisture of windrow, realized the purpose of blue-green algae and bed mud minimizing.

For the feature of the algae toxin of high-content in the blue-green algae, the present invention has kept the microorganism active in the heap body preferably in the thermophilic fermentation process, utilizes microorganism in the heap body algae toxin in the blue-green algae of having degraded thoroughly.

High for the blue-green algae nitrogen content, C/N is than low, and traditional composting mode makes the rear characteristics that produce nitrogen loss of organonitrogen degraded easily, has developed a series of high-efficiency nitrogen-fixing agent for blue-green algae and bed mud compost, and the fixed rate of nitrogen has reached more than 50%.

Four, description of drawings

Fig. 1 isBlue-green algae and bed mud associating composting technology process flow sheet

Five, embodiment

The below narrates embodiments of the invention.

The bed mud of heavy metal contamination innoxious and with the federated resource technology of blue-green algae:

The mentioned technique according to the present invention, according to flow process (seeing accompanying drawing 1) to processing from the bed mud of Taihu Lake heavy metal contamination.Get about 50 tons of solid contents and be 20% polluted bed mud, existing certain heavy metal contamination through measuring, and having stink.

Bioleaching detoxification and to bottom-mud dewatering after the detoxification: be 60M for 1:9 joins useful volume by volume with bioleaching microbial inoculant thing and fresh polluted bed mud 3Reactor in, under the condition of ventilation aeration, carry out stirring and evenly mixing, be under 25 ℃ in temperature, bioleaching through 48h is processed, and the pH of bed mud drops to about 3, has reached more than 80% through the clearance of measuring the heavy metal in bed mud this moment, and the dewatering of bed mud also is greatly improved, and the heavy metal before and after the bed mud bioleaching and the resistivity of bed mud see Table 1.With (volume reduce to original 2/3) the directly press filtration under the barrier film chamber-type press filter in settling bowl behind the natural subsidence 10h of the bed mud after the above-mentioned detoxification, the bed mud that squeezes out is khaki color, odorless, water ratio are below 40%, and the content of the organic matter in the bed mud does not obviously reduce.

Heavy metal before and after table 1 bed mud bioleaching is processed and resistivity change

Mix with a certain amount of dehydration blue-green algae mud through the cleaning bed mud after the bioleaching processing above-mentioned, according to bed mud: blue-green algae mud: wood sawdust (volume ratio) is nursed one's health blue-green algae and bed mud for the ratio of 1:1:1, material water ratio after the conditioning is that 63%, C/N is 27:1.Then above-mentioned material is changed in the ventilating fermentation workshop, every other day material is carried out turning once, fermentation period is 20 days.After one time fermentation finishes the material after the above-mentioned fermentation is transferred to the Secondary Fermentation workshop and carries out the forced ventilation static fermentation, until leavening temperature is down to till the envrionment temperature, the water ratio of this moment further reduces the mixed matured compost of the blue-green algae of being become thoroughly decomposed fully and bed mud.

2. the associating high temperature of bed mud and blue-green algae is protected the nitrogen application technology as the second resource:

The mentioned technique according to the present invention is united high temperature according to flow process (seeing accompanying drawing 1) to bed mud and blue-green algae and is protected the nitrogen composting technology, and it is leaving from station that the used blue-green algae mud of compost is taken from Wujin District Xue Yan town, Changzhou algae moisture, and bed mud is taken near the bed mud of Taihu Lake tribute arm of lake.Bed mud in this example exists certain heavy metal contamination too, to the heavy metal removing technology in this bed mud with embodiment 1.

Press bed mud: blue-green algae mud: mushroom residue (volume ratio)=1:1:1 proportioning mixing raw material, add simultaneously mass ratio and be the chicken manure of raw material gross weight 5% and do inoculum.Material is divided into two parts, and 1. a copy of it is designated as processing in contrast, and another part adds the calcium superphosphate of heap weight dry weight 3%, is designated as processing 2..Each processes composting slivering buttress formula in the compost workshop, and every heap is long: wide: height=9:1.2:1.Per 4 days with the turnover throwing machine turning once.

The degraded situation of algae toxin is one of key that solves the blue-green algae problem, and the degradation rate of the algae toxin under the natural storage is very slow.After During High-Temperature Composting, algae content of toxins significantly degraded under microbial process in the blue-green algae, the degradation rate of algae toxin is all about 90%.After adding calcium superphosphate, not only increase the nutrition in the composting system, and improved the microbic activity in the composting system, be conducive to the further degraded of algae toxin, the degradation rate of MC-RR and MC-LR has reached respectively 92.96% and 100%, has guaranteed the agricultural security of blue-green algae compost.The variation of algae content of toxins sees Table 2 before and after the hybrid composting:

The variation (μ g/g) of algae content of toxins before and after the table 2 blue-green algae compost

After in composting process, adding calcium superphosphate, accelerated organic degradation rate, and effectively controlled nitrogen loss, compost quality obviously is better than control treatment, full nitrogen, full phosphorus and full potassium content are respectively 20.75g/kg, 10.02g/kg and 11.32g/kg, total nutrient (N+P 2O 5+ K 2O) content reaches more than 5%, reaches organic fertilizer total nutrient standard.

Blue-green algae and bed mud hybrid composting were through 37 days studies show that: the indexs such as comprehensive pH, temperature, organic matter, total nutrient, seed germination index, algae toxin, dehydration blue-green algae and bed mud compost can reach through one month and become thoroughly decomposed, and can realize target innoxious, resource utilization.

Claims (6)

1. a blue-green algae and the mud bed mud method of compost altogether is characterized in that:
(1) take blue-green algae and polluted bed mud as raw material, at first adopt the bioleaching technology that the heavy metal in the polluted bed mud is removed, the bed mud that obtains cleaning, then with blue-green algae with clean bed mud and mix according to certain ratio.
(2) for the physical and chemical character of blue-green algae with the cleaning bed mud, add certain amendment and nitrogen protecting agent, with the water ratio of windrow and C/N than transferring to suitable ratio.
(3) above-mentioned material is changed over to carry out compost fermentation in the compost workshop, regularly ventilate and turning, fermentation period is about 20 days.
2. a kind of blue-green algae according to claim 1 and polluted bed mud are total to the method for compost, it is characterized in that again changing the material after processing through (3) over to the Secondary Fermentation workshop carries out Secondary Fermentation, until its leavening temperature no longer changes after reaching envrionment temperature.
3. a kind of blue-green algae according to claim 1 and the mud bed mud method of compost altogether is characterized in that the amendment described in (2) is a kind of in stalk, rice husk, wheat bran, mushroom residue, the dregs of a decoction and the wood chip etc. or combination that they are different.
4. a kind of blue-green algae according to claim 1 and the mud bed mud method of compost altogether is characterized in that the nitrogen protecting agent described in (2) is a kind of or its various combination in the mixed solution of acidifying zeolite, calcium superphosphate and magnesium hydroxide and phosphoric acid.
5. a kind of blue-green algae according to claim 1 and polluted bed mud are total to the method for compost, and the moisture control that it is characterized in that initially piling body is about 60%, and the C/N ratio is controlled at 25-30:1.
6. a kind of blue-green algae according to claim 1 and polluted bed mud are total to the method for compost, and the degradation rate of algae toxin has reached more than 92% to it is characterized in that processing later on through high-temperature aerobic fermentation.
CN2012104371444A 2012-11-06 2012-11-06 Method for co-composting of blue-green algae and polluted bottom sediment CN102875210A (en)

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CN103224418A (en) * 2013-03-08 2013-07-31 南京农业大学 Blue alga compost and its making method
CN103396179A (en) * 2013-08-06 2013-11-20 江苏太湖地区农业科学研究所 Rapid composting method of water plant by utilization of biomass charcoal
CN103739411A (en) * 2014-01-17 2014-04-23 合肥市东方美捷分子材料技术有限公司 Preparation method of functional organic fertilizer for soil restoration
CN103771936A (en) * 2013-12-26 2014-05-07 山东洁晶集团股份有限公司 Method for accelerating fermentation of peanut shells by using seaweed residue decomposed old materials
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CN103224418A (en) * 2013-03-08 2013-07-31 南京农业大学 Blue alga compost and its making method
CN103396179B (en) * 2013-08-06 2015-01-14 江苏太湖地区农业科学研究所 Rapid composting method of water plant by utilization of biomass charcoal
CN103396179A (en) * 2013-08-06 2013-11-20 江苏太湖地区农业科学研究所 Rapid composting method of water plant by utilization of biomass charcoal
CN103771936A (en) * 2013-12-26 2014-05-07 山东洁晶集团股份有限公司 Method for accelerating fermentation of peanut shells by using seaweed residue decomposed old materials
CN103771936B (en) * 2013-12-26 2016-01-20 山东洁晶集团股份有限公司 A kind of utilize marine alga slag become thoroughly decomposed old material accelerate Pericarppium arachidis hypogaeae fermentation method
CN103739411B (en) * 2014-01-17 2015-10-28 合肥市东方美捷分子材料技术有限公司 A kind of preparation method of functional organic fertilizer for soil restoration
CN103739411A (en) * 2014-01-17 2014-04-23 合肥市东方美捷分子材料技术有限公司 Preparation method of functional organic fertilizer for soil restoration
CN104261981B (en) * 2014-09-19 2017-06-16 南京农业大学 The preparation method of seaweed organic fertilizer material and the organic fertilizer being made of the method
CN104261981A (en) * 2014-09-19 2015-01-07 南京农业大学 Preparation method of seaweed organic fertilizer and organic fertilizer prepared by using method
CN104478505A (en) * 2014-12-23 2015-04-01 常熟市添源环保科技有限公司 Method for producing organic fertilizer through combination of pond sludge, algae and straw
CN105130644A (en) * 2015-06-24 2015-12-09 江苏省农业科学院 Alga, aquatic plant and sludge matrix preparing method
CN105272446A (en) * 2015-09-27 2016-01-27 常州市奥普泰科光电有限公司 Method for preparing bioorganic fertilizer by using blue algae
CN105541441A (en) * 2016-02-23 2016-05-04 清远海贝生物技术有限公司 Organic fertilizer prepared from chicken manure and mushroom dregs and rapid preparation method of organic fertilizer
CN105800892A (en) * 2016-05-13 2016-07-27 安徽金农惠民生物技术有限公司 Blue-green algae and excess sludge resourceful treatment method
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
CN106905036A (en) * 2017-02-20 2017-06-30 同济大学 It is a kind of to add the aerobic humification method of waste dish containing humus river bottom mud high
CN107353105A (en) * 2017-07-31 2017-11-17 常州建轩纺织品有限公司 Salvage thing During High-Temperature Composting and protect nitrogen method in a kind of lake
CN107347498A (en) * 2017-08-15 2017-11-17 中林山水(北京)生态科技股份有限公司 The method for repairing Nutrition Soil using organic waste and sludge manufacture mine
CN108033856A (en) * 2017-12-12 2018-05-15 西安建筑科技大学 A kind of device and method that fertilizer is prepared using Eichhornia crassipes

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Application publication date: 20130116