CN109706188A - A method of improving piggery wastewater form anaerobic fermentation methane yield - Google Patents
A method of improving piggery wastewater form anaerobic fermentation methane yield Download PDFInfo
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- CN109706188A CN109706188A CN201910012364.4A CN201910012364A CN109706188A CN 109706188 A CN109706188 A CN 109706188A CN 201910012364 A CN201910012364 A CN 201910012364A CN 109706188 A CN109706188 A CN 109706188A
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- anaerobic fermentation
- improving
- piggery wastewater
- biomass
- methane yield
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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
Abstract
The invention discloses a kind of methods for improving piggery wastewater form anaerobic fermentation methane yield, include the following steps: S1, air-dry biomass incinerator slag, crush, sieving；S2, biomass incinerator ground-slag end obtained in S1 is added in sump, is stirred evenly with piggery wastewater；S3, waste water obtained in S2 is entered into anaerobic fermentation reactor production biogas by pump；S4, by the water outlet after anaerobic fermentation obtained in S3 after being separated by solid-liquid separation, biogas slurry is as liquid fertilizer for irrigating crops, and for biogas residue for producing composite organic fertilizer, this method raw material is cheap and easy to get, and is basic matterial, suitable for vast scale pig breeding farm.
Description
Technical field
The present invention relates to technical field of energy saving and environmental protection, in particular to a kind of raising piggery wastewater form anaerobic fermentation methane yield
Method.
Background technique
Currently, the waste water that scale pig breeding farm generates has discharge amount big, organic matter concentration height, nitrogen content height etc.
Feature if being directly discharged into water body easily causes water eutrophication, therefore is generally handled by anaerobic fermentation reactor, generation
Biogas is for generating electricity, and biogas slurry is for irrigating agriculture crops.CSTR anaerobic reactor (continuously stirring anaerobic reactor) is anaerobism hair
One kind of ferment reactor, inside agitating device is installed, be uniformly distributed material in reactor, avoid stratification state, increase
Contact of the fermentation raw material with microorganism is added, has had the characteristics that occupied area is small, at low cost, but since fermentation raw material is located always
In low concentration, gas producing efficiency is not high.
To solve the problems, such as the vast rural areas straw utilization and developing clean energy resource, reproducible biomass generation
It was widelyd popularize in recent years in China, and was used for about 40,000,000,000 yuan of biomass power generation newly-increased investment, biomass direct combustion power generation installation
Total amount is up to 7,000,000 kw.However biomass electric power plant can generate a large amount of clinker in the process of running, if without effectively providing
Sourceization utilizes, and will become new pollution sources, brings huge pressure to environment.
A kind of method for improving piggery wastewater form anaerobic fermentation methane yield of the present invention, biomass incinerator slag is applied to
In the anaerobic fermentation process of pig-breeding waste water, since biomass incinerator slag has strong basicity, and contain lot of trace and trace
Secondary element (Fe, Mn, Cu, Zn, Co, Mo, As etc.), can promote the growth of piggery wastewater acidification hydrolization and methanogen, thus
Biogas output is improved, water outlet is after being separated by solid-liquid separation, and biogas slurry is used to irrigate crops as liquid fertilizer, slag containing biomass incinerator
Biogas residue for producing compound organic fertilizer, not only can solve the resource utilization problem of agricultural wastes, also improve attached
It is value added, there is good ecological benefits and economic benefit, there is vast potential for future development.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of raising piggery wastewater anaerobic fermentation natural pond
The method of gas yield.
This method raw material is cheap and easy to get, and is basic matterial, can promote the acidification of piggery wastewater containing various trace elements
Hydrolysis promotes methanogen growth, enhances the stability of system, improve biogas output into after anaerobic fermentation reactor；Natural pond
Liquid is as liquid fertilizer for irrigating crops；The biogas residue of the clinker containing biomass is suitable for vast scale for producing compound organic fertilizer
Change pig breeding farm.
According to an aspect of the invention, there is provided a kind of method for improving piggery wastewater form anaerobic fermentation methane yield, packet
Include following step:
S1, biomass incinerator slag is air-dried, is crushed, sieving；
S2, biomass incinerator ground-slag end obtained in S1 is added in sump, is stirred evenly with piggery wastewater；
S3, waste water obtained in S2 is entered into anaerobic fermentation reactor production biogas by pump；
S4, by the water outlet after anaerobic fermentation obtained in S3 through separation of solid and liquid after, biogas slurry as liquid fertilizer be used for irrigate agriculture
Crop, biogas residue is for producing composite organic fertilizer.
Further, in step S1, the biomass incinerator slag is derived from stalk, bagasse, eucalyptus barks wherein at least
The clinker that a kind of biomass power generation by waste combustion factory for raw material generates after burning.
Further, in step S1, after the biomass incinerator slag is fetched, re-sieving in natural air drying 3 days or more.
Further, the sieve partial size used when sieving is 100 mesh.
Further, the biomass incinerator slag powder diameter is less than or equal to 0.15mm.
Further, in step S2, biomass incinerator ground-slag end dosage is 5-10g/L, the sump band
There are blender, mixing speed 150r/min, mixing time is 4 hours.
Further, in step S3, the anaerobic fermentation reactor is CSTR anaerobic reactor, mixing speed 180r/
Min, mixing time are 48 hours.
Further, in step S4, biogas slurry and biogas residue are separated using extrusion spiral formula solid-liquid separating machine；The biogas slurry contains
There are the soluble elements in biomass clinker, as liquid fertilizer for irrigating crops；The biogas residue contains biomass clinker, uses
In production composite organic fertilizer.
Compared with the existing prior art, the invention has the advantages that and the utility model has the advantages that
(1) the biomass incinerator slag that the present invention applies, it is cheap and easy to get, there is strong basicity, contain lot of trace and trace
Element (Fe, Mn, Cu, Zn, Co, Mo, As etc.), can promote the metabolism of methanogen, improve methane phase to having in waste water
The utilization efficiency of machine object, to improve the biogas output of piggery wastewater anaerobic fermentation and CSTR anaerobic reactor (continuously stirs anti-
Answer device) gas producing efficiency.
(2) biogas slurry and biogas residue are produced, wherein biogas slurry by being separated by solid-liquid separation after piggery wastewater anaerobic fermentation of the invention
Containing nutrient and microelement soluble in biomass clinker, crops are irrigated for liquid fertilizer, crops can be promoted
Growth and development, while soil environment can also be improved；Biogas residue and biomass clinker are used for compost, are production compound organic fertilizers
Quality material, it is with good economic efficiency.
(3) biomass incinerator slag is applied in the anaerobic waste water fermentation process of scale pig breeding farm by the present invention,
The biogas output of piggery wastewater anaerobic fermentation is not only increased, the also resource utilization for biomass dregs of incinerator provides newly
Direction, realize waste treatment and waste, have good ecological benefits and economic benefit.
Detailed description of the invention
Fig. 1 is that the process of the method for the raising piggery wastewater form anaerobic fermentation methane yield of one embodiment of the present invention is shown
It is intended to
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings.
Fig. 1 schematically shows a kind of a kind of raising piggery wastewater anaerobic fermentation of embodiment according to the present invention
The method of biogas output.
As shown, this method is implemented by following steps:
Collect from biomass power generation by waste combustion factory take stalk, bagasse, eucalyptus barks etc. as the biomass generated after raw material burns
Dregs of incinerator 1, clinker are stacked on the antiseepage floor on pig farm after fetching, and natural air drying 3 days or more；
Biomass incinerator slag 1 is weighed by the dosage of 5-10g/L, after being crushed by pulverizer 2, is sieved with 100 mesh sieve
Net, obtains biomass incinerator ground-slag end 3, and the partial size at biomass incinerator ground-slag end 3 is less than or equal to 0.15mm；
Biomass incinerator ground-slag end 3 is added in sump 4 by the dosage of 5-10g/L, the stirring speed of sump 4
Degree is 150r/min, and hydraulic detention time is 4 hours；
The water outlet pump of sump 4 is lifted into CSTR anaerobic reactor 5 (continuously stirring anaerobic reactor), is stirred
Mixing speed is 180r/min, and hydraulic detention time is 48 hours；
Extrusion spiral formula solid-liquid separating machine is passed through into the water outlet of CSTR anaerobic reactor 5 (continuously stirring anaerobic reactor)
6, biogas slurry and biogas residue are obtained, for biogas slurry as liquid fertilizer for irrigating crops, the biogas residue of the slag containing biomass incinerator is multiple for producing
Close organic fertilizer 7.
Carry out the biogas production of 20 batches, the method in conventional production process and the present embodiment alternately, as a result such as
Shown in the following table 1.
The biogas yield comparison sheet of the two different production methods of table 1
| Conventional biogas yield (LL-1·d-1) | The present embodiment biogas yield (LL-1·d-1) | Increase rate (%) | |
| 1 | 1.17 | 1.42 | 21.37% |
| 2 | 1.20 | 1.42 | 18.33% |
| 3 | 1.18 | 1.46 | 23.73% |
| 4 | 1.25 | 1.49 | 19.20% |
| 5 | 1.08 | 1.33 | 23.15% |
| 6 | 1.23 | 1.67 | 35.77% |
| 7 | 1.11 | 1.40 | 26.13% |
| 8 | 1.16 | 1.44 | 24.14% |
| 9 | 1.21 | 1.48 | 22.31% |
| 10 | 1.15 | 1.37 | 19.13% |
As seen from the above table, it using the production method provided in the present embodiment, compared with conventional method, can be improved
18.33%~35.77% biogas yield.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (8)
1. a kind of method for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that include the following steps:
S1, biomass incinerator slag is air-dried, is crushed, sieving；
S2, biomass incinerator ground-slag end obtained in S1 is added in sump, is stirred evenly with piggery wastewater；
S3, waste water obtained in S2 is entered into anaerobic fermentation reactor production biogas by pump；
S4, by the water outlet after anaerobic fermentation obtained in S3 through separation of solid and liquid after, biogas slurry as liquid fertilizer be used for irrigate crops,
Biogas residue is for producing composite organic fertilizer.
2. the method according to claim 1 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that step S1
In, the biomass incinerator slag, which is derived from, burns hair using stalk, bagasse, eucalyptus barks wherein at least one as the biomass of raw material
The clinker that power plant generates after burning.
3. the method according to claim 1 or 2 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that step
In rapid S1, after the biomass incinerator slag is fetched, re-sieving in natural air drying 3 days or more.
4. the method according to claim 3 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that when sieving
The sieve partial size used is 100 mesh.
5. the method according to claim 1 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that the life
Substance dregs of incinerator powder diameter is less than or equal to 0.15mm.
6. the method according to claim 1 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that step S2
In, biomass incinerator ground-slag end dosage is 5-10g/L, and the sump has blender, mixing speed 150r/
Min, mixing time are 4 hours.
7. the method according to claim 1 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that step S3
In, the anaerobic fermentation reactor is CSTR anaerobic reactor, and mixing speed 180r/min, mixing time is 48 hours.
8. the method according to claim 1 for improving piggery wastewater form anaerobic fermentation methane yield, which is characterized in that step S4
In, biogas slurry and biogas residue are separated using extrusion spiral formula solid-liquid separating machine；The biogas slurry contains the solubility member in biomass clinker
Element, as liquid fertilizer for irrigating crops；The biogas residue contains biomass clinker, for producing composite organic fertilizer.
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| CN1060279A (en) * | 1990-09-29 | 1992-04-15 | 上海东海水产科技服务部 | Pig farm wastewater treatment and utilize technology |
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| CN102616982A (en) * | 2012-03-12 | 2012-08-01 | 浙江大学 | High-efficiency and low-consumption standard-reaching treatment method for wastewater from scale piggery raising |
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Application publication date: 20190503 |