CN101613223A - With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced - Google Patents
With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced Download PDFInfo
- Publication number
- CN101613223A CN101613223A CN200910067252A CN200910067252A CN101613223A CN 101613223 A CN101613223 A CN 101613223A CN 200910067252 A CN200910067252 A CN 200910067252A CN 200910067252 A CN200910067252 A CN 200910067252A CN 101613223 A CN101613223 A CN 101613223A
- Authority
- CN
- China
- Prior art keywords
- compost
- composting
- ammonia
- calcium superphosphate
- chicken manure
- 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
Images
Classifications
-
- 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
Landscapes
- Fertilizers (AREA)
Abstract
With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced, and belongs to fertilizer amendment technical field.The present invention includes following steps: a) batch mixing: is to be mixed into composting material at 25: 1 with chicken manure and corn dry straw by carbon-nitrogen ratio, with calcium superphosphate by even the spreading wherein of the heavy 1-2% consumption of composting material butt; B) water transfer branch: drop in the solid-state fermentation tank, the control original water content is 60%; C) compost: be not less than 10% with oxygen concentration in the emission gases and regulate ventilation, every 120min stirs 1 time, stirs 15-20min at every turn, and mixing speed is 10 commentaries on classics/min; D) go out fertilizer: pour out from jar, weighing, packing are dispatched from the factory.The present invention is applicable to original position, transposition compost, can reduce the volatilization and the release of ammonia, plays the fixedly effect of nitrogen, can also increase phosphorus content, and it is plain not enough to replenish phosphorus, has rapid-actionly, and cost is low, characteristics nontoxic, free from environmental pollution.
Description
Technical field
The invention belongs to fertilizer amendment technical field, being specifically related to calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced.
Background technology
Along with developing rapidly of intensification, scale animal and poultry cultivation industry; large-scale modernized stock-farms, breed factory constantly occur; produce a large amount of animal wastes thereupon; the heap of feces of livestock and poultry such as chicken manure is rotten to be handled (it is the most difficult wherein to handle with the ight soil of chicken especially) is agricultural wastes minimizing, innoxious and resource utilization one of processing mode the most easily; can not only solve organic problem of environmental pollution; also for agriculture production provides the high-quality fertilizer, meet the sustainable development direction of modern agriculture simultaneously.
Nitrogenous substances is many in the feces of livestock and poultry, and carbon-nitrogen ratio is low, can occur the ammonia volatilization in the composting process, if do not take measures to prevent the volatilization of ammonia, will certainly cause a large amount of nitrogens loss.In addition, ammonia is the main component that compost produces foul smell, and distributing of foul smell can cause topsoil; Though do not cause smelly unique material though ammonia is not a feces of livestock and poultry, the volatilization height correlation of other odor causing substance in ammonia burst size and the ight soil promptly reduces ammonia and discharges, and can reduce the stench of ight soil.
In general, the nitrogen total amount of losing because of ammonia release in the composting process accounts for the 17-50% of original nitrogen total amount, and nitrogen content is high more, and the ammonia burst size is just big more.So ammonia release is stink control and the key point that improves the nitrogen retention rate in the control composting process.
In addition, because the phosphorus content deficiency of composting material so the phosphorus cellulose content in the composting production is also generally lower, should be considered an amount of phosphorus element that replenishes in producing composting process.
Prevent that ammonia evaporable approach can be considered from the following aspects in the composting process:
1, Shi Yi composting process condition.In composting process, suitable carbon-nitrogen ratio, pH value, the moisture content of control composting material, and suitably control various parameters such as ventilation and stirring, will effectively suppress nitrogen loss.
2, adding the material with adsorptivity when compost volatilizees to prevent ammonia.As when adding sawdust, bark etc., prevent that ammonia evaporable effect is better, when adding inorganic nature sorbing material such as vermiculite, zeolite, adsorptivity is then stronger, suppresses that foul smell produces and ammonia evaporable effect is good more.But owing to add sorbing material or carbon-nitrogen ratio height, or nutrient content is low or do not contain nutrient, tends to reduce the nutrient content of compost or postpones becoming thoroughly decomposed the time of compost.
3, utilize chemical method to reclaim ammonia.Gas that composting process gave out is fed dilute sulphuric acid or phosphoric acid absorbs ammonia, this method effect is better, but consumes a large amount of sulfuric acid or phosphoric acid can increase the compost production cost.
4, add the volatilization that microbiobacterial agent reduces ammonia.Utilize the loss of the nitrogen fixation minimizing ammonia of microbiobacterial agent.
Although doing a large amount of research work around above method aspect the control of compost ammonia both at home and abroad, but majority all is that the ammonia that produces is absorbed, fundamentally do not reduce the release of ammonia, do not play nitrogen fixed effect, the effect of promoting on producing not is fine at present.
Calcium superphosphate claims superphosphate or general calcium again.Be generally white or light grey powder, also have granularly, it is made with acid treatment by ground phosphate rock, and the main chemical reactions equation of producing calcium superphosphate with ground phosphate rock is:
Ca
10(PO
4)
6F
2+7H
2SO
4+3H
2O→3Ca(H
2PO
4)·H
2O+7CaSO
4+2HF
The main component of calcium superphosphate is a water miscible water mono-calcium phosphate (Ca (H
2PO
4) H
2O) and be insoluble in the calcium sulfate (CaSO of water
4) the two accounts for the 30-50% and 40% of superphosphate fertilizer respectively, wherein the former is the effective constituent of calcium superphosphate, calcium superphosphate also has ferric sulfate, the Tai-Ace S 150 of 2-4% in addition, the free acid of 3.5-5.0% (mainly being phosphoric acid and sulfuric acid).The quality standard of calcium superphosphate national regulation is GB20413-2006, belongs to water soluble quick-acting phosphate fertilizer, can directly make phosphate fertilizer, also can be used for compound fertilizer making.
Summary of the invention
The object of the present invention is to provide with calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced, and reduces nitrogen loss and increases the phosphorus element, to overcome the deficiencies in the prior art.
Technical scheme of the present invention is:
May further comprise the steps:
A) batch mixing: chicken manure and pulverizing are mixed the formation composting material for the segment corn dry straw of 1-2cm, making its carbon-nitrogen ratio is 25: 1, commodity phosphate fertilizer calcium superphosphate evenly spread in the above-mentioned composting material form mixture, its consumption is that composting material is by the heavy 1-2% of butt, before compost, only use once;
B) water transfer branch: said mixture is dropped in the solid-state fermentation tank, and the original water content of control composting material is 60%;
C) compost: in the production cycle of 30 days compost, forced ventilation is not less than 10% with oxygen concentration in the emission gases and regulates air flow, and every 120min stirs 1 time, stirs 15-20min at every turn, and mixing speed is 10 commentaries on classics/min;
D) go out fertilizer: the mixture that will finish compost is poured out from solid-state fermentation tank, obtains the industrial composting product, and weighing, packing are dispatched from the factory.
Amendment of the present invention to the control mechanism of ammonia is:
At the compost initial stage, under the usefulness of high temperature microbe, large amount of organic matter is decomposed, and organic nitrogen changes into inorganic nitrogen, and inorganic nitrogen further changes into ammonia (NH under the effect of Ammonifying bacteria
3), therefore, the peak period of ammonia burst size appears at the initial stage of compost.Then, along with the microorganism mineralization weakens, the amount that organic nitrogen is degraded to inorganic nitrogen reduces, and ammonium nitrogen content descends.Even the pH value of compost rises to some extent, but the generation of ammonia is because ammonium nitrogen content descends and minimizing thereupon; In addition, ammonium nitrogen changes into nitric nitrogen under the usefulness of nitrobacteria, has suppressed the generation of ammonia.This shows that the check point that ammonia discharges in the composting process is the early stage of compost.
Remove in the superphosphate fertilizer of the amendment that is used as and contain Ca (H
2PO
4)
2H
2O (main component), CaSO
4H
2Outside the O (impurity), also contain free acids such as a certain amount of phosphoric acid, sulfuric acid, the H in the free acid
+Thereby ion can help fixing of ammonia with ammonia gas react, suppresses the pH value and raises, and reduces it to external world's volatilization and release.
Ammonia and H
+Ion-reaction equation: NH
3+ H
+→ NH
4 +
Result and analysis that fertilizer seminar of Jilin Agriculture University conducts a research:
1, composting material
Composting material is chicken manure and maize straw.
Chicken manure is taken from layer breeding field, Shi Lipu village, clean month district, Changchun, Jilin Province, and maize straw is taken from the experimental plot of Jilin Agriculture University's experiment centre, pulverizes to be the segment stalk about 1-2cm.The basic proterties of composting material sees Table 1.
Table 1 composting material main component content (gkg
-1)
| Raw material | Full nitrogen | Full carbon | Full phosphorus | Full potassium |
| Chicken manure | ??22.4 | ??186 | ??23.1 | ??17.8 |
| Maize straw | ??8.3 | ??523 | ??2.38 | ??11.4 |
2, composting arrangement
The BIOTECH-30SS type solid-state fermentation tank that Shanghai Baoxing Biology Equipment Engineering Co., Ltd produces.
3, compost scheme
6.86kg chicken manure (by butt) and 8.14kg maize straw (by butt) are mixed (carbon-nitrogen ratio by the composting material after this mixed is 25: 1), the original water content of control composting material is 60%, forced ventilation, be not less than 10% with oxygen concentration in the emission gases and regulate air flow, 120min stirs 1 time, each 20min that stirs, rotating speed is 10 commentaries on classics/min.
Test being provided with control group (not adding calcium superphosphate), adding 1% calcium superphosphate group and adding 2% calcium superphosphate group totally 3 groups, respectively in the burst size of measuring ammonia in 0,1,2,3,5,7,10,15,20,25,30 day of compost.
4, the test method of technical indicator
The mensuration of total nitrogen content: the regulation of NY/T 53-1987 is carried out;
The mensuration of full carbon content: the regulation of NY/T 85-1988 is carried out;
The mensuration of content of tatal phosphorus: the regulation of NY/T 88-1988 is carried out;
Full determination of potassium content: the regulation of NY/T 87-1988 is carried out;
The mensuration of available phosphorus content: the regulation of NY/T 148-1990 is carried out;
The mensuration of moisture: the regulation of NY/T 52-1987 is carried out.
The mensuration of oxygen concentration in the emission gases: with CYES-II type O
2, CO
2Gas determinator (production of Jiading, Shanghai City instrucment and meter plant of student's federation) is measured.
The measuring method of ammonia: adopted 2% boric acid continuous absorption 10 hours, and saw Fig. 1, make mixture indicator, the method for 0.01mol/L standard salt acidometric titration with tetrabromo-mcresolsulfonphthalein-methyl red (0.099g tetrabromo-mcresolsulfonphthalein and 0.066g methyl red are dissolved in the 100ml ethanol).
5, validity check
The results are shown in Figure 2, ordinate zou is the ammonia rate of release, and unit is mg/hour, and X-coordinate is the time, and unit is the sky; Curve 1 is a control group, and curve 2 is for adding 1% calcium superphosphate group, and curve 3 is for adding 2% calcium superphosphate group.
Fig. 2 shows in the composting material and adds after the calcium superphosphate amendment that the volatilization trend of volatile ammonia is consistent with the control treatment of no amendment.At the compost initial stage, along with the rising of heap temperature, the volatile quantity of ammonia increases sharply, and when the climax appeared at 5 days, subsequently along with the carrying out of nitrification and denitrification and the decline gradually of compost temperature, the volatile quantity of ammonia reduced.Add amendment and handle compared with the control, though ammonia volatilization rule unanimity, volatilization intensity obviously weakens, calcium superphosphate 1% addition, calcium superphosphate 2% addition compared with the control, the maximum rate of volatilization of ammonia has reduced by 14.2% and 16.7% respectively.
Identical composting material is carried out compost under identical conditions, measure 3 content of handling full nitrogen and available phosphorus in the composting productions after 30 days, see Table 2.
Nutrient content analysis (the gkg of table 2 composting production
-1)
| Handle group | Full nitrogen | Available phosphorus |
| Control group | ??14.80±0.07 | ??11.21±0.10 |
| Add 1% calcium superphosphate group | ??15.89±0.16 | ??11.93±0.14 |
| Add 2% calcium superphosphate group | ??16.43±0.14 | ??12.65±0.12 |
Data as can be known from table 2: calcium superphosphate is added in the organic materials, and after compost treatment, with respect to control group, adding proportion is 1% o'clock, and total nitrogen content increases 1.09gkg
-1, amplification is 7.36%; Adding proportion is 2% o'clock, and total nitrogen content increases 1.63gkg
-1, amplification is 11.0%, shows that the calcium superphosphate amendment has certain guarantor's nitrogen ability.Available phosphorus content has increased 0.72gkg than control group respectively
-1(adding proportion is 1% processing), 1.44gkg
-1(adding proportion is 2% processing).
As seen from Figure 2, in the middle and later periods of compost, ammonia also still keeps certain burst size, but burst size is very little, and promptly ammonia release mainly concentrates on the compost initial stage in the composting process, and therefore, the effect that adds calcium superphosphate before compost can be better than the adding of compost later stage.
Positively effect of the present invention is:
Be applicable to original position, the transposition compost of organic solid castoff, can either reduce the volatilization and the release of ammonia, play the fixedly effect of nitrogen, can also increase simultaneously the content of the phosphorus in the composting production, replenish the plain deficiency of phosphorus in the compost, have rapid-action, cost is low, characteristics nontoxic, free from environmental pollution.
Description of drawings
Fig. 1 is that ammonia absorbs synoptic diagram.
Fig. 2 is the change curve of ammonia rate of release in the composting process.
Embodiment
The present invention will now be further detailed embodiment:
Embodiment 1:
A) batch mixing: 457kg chicken manure (by butt) and 543kg (by butt) pulverizing are mixed the formation composting material for the segment corn dry straw of 1cm, making its carbon-nitrogen ratio is 25: 1, just consumption be composting material by butt heavy 1% be that 10kg commodity phosphate fertilizer calcium superphosphate evenly spreads in the above-mentioned composting material and forms mixture, before compost, only use once;
B) water transfer branch: said mixture is dropped in the solid-state fermentation tank, and the original water content of control composting material is 60%;
C) compost: in the production cycle of 30 days compost, forced ventilation is not less than 10% with oxygen concentration in the emission gases and regulates air flow, and every 120min stirs 1 time, stirs 15min at every turn, and mixing speed is 10 commentaries on classics/min;
D) go out fertilizer: the mixture that will finish compost is poured out from solid-state fermentation tank, obtains the industrial composting product, and weighing, packing are dispatched from the factory.
Embodiment 2:
A) batch mixing: 457kg chicken manure (by butt) and 543kg (by butt) pulverizing are mixed the formation composting material for the segment corn dry straw of 1.2cm, making its carbon-nitrogen ratio is 25: 1, with consumption be composting material by butt heavy 1.5% be that 15kg commodity phosphate fertilizer calcium superphosphate evenly spreads in the above-mentioned composting material and forms mixture, before compost, only use once;
B) water transfer branch: said mixture is dropped in the solid-state fermentation tank, and the original water content of control composting material is 60%;
C) compost: in the production cycle of 30 days compost, forced ventilation is not less than 10% with oxygen concentration in the emission gases and regulates air flow, and every 120min stirs 1 time, stirs 17.5min at every turn, and mixing speed is 10 commentaries on classics/min;
D) go out fertilizer: the mixture that will finish compost is poured out from solid-state fermentation tank, obtains the industrial composting product, and weighing, packing are dispatched from the factory.
Embodiment 3:
A) batch mixing: 457kg chicken manure (by butt) and 543kg (by butt) pulverizing are mixed the formation composting material for the segment corn dry straw of 1.2cm, making its carbon-nitrogen ratio is 25: 1, with consumption be composting material by butt heavy 2% be that 20kg commodity phosphate fertilizer calcium superphosphate evenly spreads in the above-mentioned composting material and forms mixture, as treatment group, before compost, only use once;
Meanwhile, set up control group, in addition 457kg chicken manure (by butt) and 543kg (by butt) are mixed the formation mixture, and do not add commodity phosphate fertilizer calcium superphosphate;
B) water transfer branch: said mixture is dropped in the solid-state fermentation tank, and the original water content of control composting material is 60%;
C) compost: in the production cycle of 30 days compost, forced ventilation is not less than 10% with oxygen concentration in the emission gases and regulates air flow, and every 120min stirs 1 time, stirs 20min at every turn, and mixing speed is 10 commentaries on classics/min;
According to the requirement in above-mentioned " compost scheme " treatment group and control group are carried out the aerobic compost processing.Measure the burst size of ammonia respectively the 5th day and 10 days.The ammonia release conditions sees Table 3:
Ammonia release conditions (mgNH of different compost time of table 3
3/ hour)
| Handle group | 5 |
10 days |
| Control group | ??108.6 | ??112.3 |
| Add the calcium phosphate treatment group | ??91.2 | ??73.5 |
By table 3 as seen, discharging the compost initial stage of comparatively concentrating by it, adding calcium superphosphate and make the ammonia burst size reduce 16.0% (5 days) and 34.6% (10 days), therefore, present method is obvious for the control effect that ammonia discharges;
D) go out fertilizer: the mixture that will finish compost is poured out from solid-state fermentation tank, obtains the industrial composting product, and weighing, packing are dispatched from the factory.
Measure total nitrogen content in treatment group and the control group composting production: be respectively 16.21gkg
-1(adding the calcium phosphate treatment group), 13.60gkg
-1(control group) shows and adds the loss that calcium superphosphate can suppress the nitrogen in the composting process, thereby increases the content of nitrogen in the composting production.
Claims (1)
1, be that amendment reduces the application method that ammonia discharges with calcium superphosphate in the industrial composting of chicken manure is produced, it is characterized in that: may further comprise the steps:
A) batch mixing: chicken manure and pulverizing are mixed the formation composting material for the segment corn dry straw of 1-2cm, making its carbon-nitrogen ratio is 25: 1, commodity phosphate fertilizer calcium superphosphate evenly spread in the above-mentioned composting material form mixture, its consumption is that composting material is by the heavy 1-2% of butt, before compost, only use once;
B) water transfer branch: said mixture is dropped in the solid-state fermentation tank, and the original water content of control composting material is 60%;
C) compost: in the production cycle of 30 days compost, forced ventilation is not less than 10% with oxygen concentration in the emission gases and regulates air flow, and every 120min stirs 1 time, stirs 15-20min at every turn, and mixing speed is 10 commentaries on classics/min;
D) go out fertilizer: the mixture that will finish compost is poured out from solid-state fermentation tank, obtains the industrial composting product, and weighing, packing are dispatched from the factory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910067252A CN101613223A (en) | 2009-07-07 | 2009-07-07 | With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910067252A CN101613223A (en) | 2009-07-07 | 2009-07-07 | With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101613223A true CN101613223A (en) | 2009-12-30 |
Family
ID=41493133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910067252A Pending CN101613223A (en) | 2009-07-07 | 2009-07-07 | With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101613223A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070158A (en) * | 2010-10-29 | 2011-05-25 | 华南农业大学 | Method and system for recycling compost volatile ammonia |
| CN103483043A (en) * | 2013-09-17 | 2014-01-01 | 昆明红云化工生产有限公司 | Ammoniated single superphosphate |
| CN103787729A (en) * | 2013-09-13 | 2014-05-14 | 保康丰源肥业有限责任公司 | Organic fertilizer and preparation method thereof |
| CN104529653A (en) * | 2015-01-08 | 2015-04-22 | 安徽亚环生物科技有限公司 | Method for preparing efficient organic fertilizer on basis of feces of livestock and poultry |
| CN110713420A (en) * | 2019-11-20 | 2020-01-21 | 农业农村部规划设计研究院 | Method for fixing nutrients in liquid dung for pig breeding |
| CN110734319A (en) * | 2019-11-20 | 2020-01-31 | 农业农村部规划设计研究院 | Method for fixing nutrients in cow dung |
| CN112341295A (en) * | 2020-10-13 | 2021-02-09 | 范正红 | Method for treating pig farm excrement and additive |
| CN113816654A (en) * | 2021-10-12 | 2021-12-21 | 浙江纳巍健康科技有限公司 | Bentonite-based composite cat litter and preparation method thereof |
-
2009
- 2009-07-07 CN CN200910067252A patent/CN101613223A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070158A (en) * | 2010-10-29 | 2011-05-25 | 华南农业大学 | Method and system for recycling compost volatile ammonia |
| CN103787729A (en) * | 2013-09-13 | 2014-05-14 | 保康丰源肥业有限责任公司 | Organic fertilizer and preparation method thereof |
| CN103483043A (en) * | 2013-09-17 | 2014-01-01 | 昆明红云化工生产有限公司 | Ammoniated single superphosphate |
| CN104529653A (en) * | 2015-01-08 | 2015-04-22 | 安徽亚环生物科技有限公司 | Method for preparing efficient organic fertilizer on basis of feces of livestock and poultry |
| CN110713420A (en) * | 2019-11-20 | 2020-01-21 | 农业农村部规划设计研究院 | Method for fixing nutrients in liquid dung for pig breeding |
| CN110734319A (en) * | 2019-11-20 | 2020-01-31 | 农业农村部规划设计研究院 | Method for fixing nutrients in cow dung |
| CN112341295A (en) * | 2020-10-13 | 2021-02-09 | 范正红 | Method for treating pig farm excrement and additive |
| CN113816654A (en) * | 2021-10-12 | 2021-12-21 | 浙江纳巍健康科技有限公司 | Bentonite-based composite cat litter and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Luo et al. | Effect of phosphogypsum and dicyandiamide as additives on NH3, N2O and CH4 emissions during composting | |
| Yuan et al. | Effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting | |
| CN101613223A (en) | With calcium superphosphate is that amendment reduces the application method that ammonia discharges in the industrial composting of chicken manure is produced | |
| CN101157587A (en) | Alkali soil modification fertility intensifying amendment and preparation method thereof | |
| CN105693425A (en) | Fertilizer applicable to saline-alkali soil and preparation method thereof | |
| CN100364935C (en) | Organic-inorganic composite bamboo shoot coat fertilizer and its production process | |
| CN109400371A (en) | A kind of carbon coupled mode stability compound fertilizer's fertilizer and preparation method | |
| Wang et al. | Sustainable composting and its environmental implications | |
| CN101863706B (en) | Organic composite fertilizer produced by using paper making sludge and manufacturing method thereof | |
| CN106866269A (en) | Polyglutamic acid composite fertilizer, preparation method and applications | |
| CN105948866A (en) | Method for preparing humus organic fertilizer from pond silt and sewage treatment plant sludge | |
| CN102531745A (en) | Special rice fertilizer for producing organic selenium-enriched rice and preparation method thereof | |
| Yang et al. | Effects of different composting strategies on methane, nitrous oxide, and carbon dioxide emissions and nutrient loss during small-scale anaerobic composting | |
| Chen | Sewage sludge aerobic composting technology research progress | |
| WO2015038071A1 (en) | Process of preparing a soil conditioner | |
| KR102114840B1 (en) | Manufacturing method for environment friendly fertilizer using livestock excretion | |
| Liu et al. | A global meta-analysis of greenhouse gas emissions and carbon and nitrogen losses during livestock manure composting: Influencing factors and mitigation strategies | |
| CN104387188A (en) | Preparation method of special slow-release fertilizer for flowers | |
| CN103265378A (en) | Organic-inorganic compound fertilizer containing biological bacterium and trace elements | |
| Wang et al. | Nutrient runoff loss from saline-alkali paddy fields in Songnen Plain of Northeast China via different runoff pathways: effects of nitrogen fertilizer types | |
| Younesian et al. | Assessment of the differences between composting and anaerobic digestion of sludge | |
| CN102531777A (en) | Long-acting alkaline nitrogenous fertilizer and production method thereof | |
| Miranda-Carrazco et al. | Greenhouse gas emissions of biosolid and cow manure during composting and vermicomposting and when applied to soil cultivated with wheat (Triticum sp. L.) | |
| CN108517215B (en) | Acid soil heavy metal lead-cadmium in-situ passivator and preparation method and application thereof | |
| Mohan et al. | Addressing the challenges of ammonia loss from poultry droppings through indigenous carbon wastes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091230 |