CN104386890A - Method for removing grit from chicken dung - Google Patents
Method for removing grit from chicken dung Download PDFInfo
- Publication number
- CN104386890A CN104386890A CN201410602916.4A CN201410602916A CN104386890A CN 104386890 A CN104386890 A CN 104386890A CN 201410602916 A CN201410602916 A CN 201410602916A CN 104386890 A CN104386890 A CN 104386890A
- Authority
- CN
- China
- Prior art keywords
- grit
- hydrolysis acidification
- acidification pool
- chicken manure
- dung
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
Abstract
The invention belongs to the field of biogas projects and in particular relates to a method for removing grit from chicken dung. The method is characterized by comprising the following steps: pouring chicken dung into a stirred grit chamber, adding water for stirring, diluting and removing grit, removing grit with the particle size of larger than 0.6mm in the dung, overflowing the upper chicken dung diluent subjected to stirring and grit removing into a hydrolysis acidification pool, and separating to remove grit with the particle size of smaller than 0.6mm in the hydrolysis acidification process, wherein the hydrolysis acidification pool comprises a primary hydrolysis acidification pool and a secondary hydrolysis acidification pool from a higher part to a lower part. The method disclosed by the invention has the advantages that the grit of various particle sizes in the dung can be completely removed due to the grit removal method, so that the grit content of feed liquid entering a fermentation tank is reduced to 2 percent or below, the influence of the grit on various subsequent links is greatly reduced, and stable operation of the biogas project by taking the chicken dung as a raw material is realized. Meanwhile, due to two-stage hydrolysis, insoluble macromolecular substances in the feed liquid are degraded into soluble small molecular substances, which are conveniently utilized by the methane bacteria, so that the gas production efficiency is improved.
Description
Technical field
The invention belongs to biogas engineering field, be specifically related to a kind of chicken manure desanding method just.
Background technology
As the sand just containing various particle diameter in chicken manure, a certain amount of oarse-grained sand of often feeding in the nursing of chicken is beneficial to the digestion of chicken.Also contain the impurity such as stone flour, secondary calcium phosphate in feed, the impurity of these small particle size by chicken complete digestion, can not be discharged with ight soil, and can combine with the mucus in digestive tube in the process of digestion, adds the difficulty of removal simultaneously.
With chicken manure just for raw material biogas engineering make chicken manure just enter anaerobic jar fermentation before first must remove sand wherein, if can not effectively remove, these sands one to make the equipment attritions such as follow-up fresh feed pump, knife mill serious, two is the blockings that can cause the pipelines such as feed-pipe, three is to cause the sand setting such as hydrolytic tank, fermentor tank serious, increase the workload of cleaning, time serious, normal fermentation gas can be had influence on.And at present for the chicken manure research that just desanding is not too many, there is no the forming method of Be very effective yet.
Summary of the invention
The object of this invention is to provide the method for a kind of chicken manure just desanding, can effectively remove chicken manure just in the sand of various particle diameter, ensure with chicken manure just for the biogas engineering steady running of raw material.
The method of a kind of chicken manure of the present invention just desanding, chicken manure is just poured into and stirs in settling pit, add that water carries out stirring, dilutes, sand setting, remove particle diameter in ight soil and be greater than the sand of 0.6mm, through stir the upper strata chicken manure after sand setting just diluent overflow in hydrolysis acidification pool, in the process of acidication, be separated the sand that removing particle diameter is less than 0.6mm, described hydrolysis acidification pool comprises elementary hydrolysis acidification pool and secondary hydrolysis acidification pool from high to low.
Wherein, the stirring velocity stirring settling pit is preferably 6 ~ 8r/min, and the total solids level of chicken manure just after dilution stirred in settling pit is preferably 8 ~ 12%.
Hydrolysis acidification pool is divided into two-stage, comprises elementary hydrolysis acidification pool and secondary hydrolysis acidification pool from high to low, and material overflow after elementary hydrolysis acidification pool hydrolysis sand setting enters secondary hydrolysis acidification pool and continues hydrolysis sand setting.
The temperature of elementary hydrolysis acidification pool preferably controls to be 16 ~ 20 DEG C, and the temperature of secondary hydrolysis acidification pool preferably controls to be 26 ~ 30 DEG C.
Elementary hydrolysis acidification pool and secondary hydrolysis acidification pool are all preferably provided with whipping appts, and mixing speed is 16 ~ 18r/min.Whipping appts on the one hand makes hydrolyzed solution be in uniform state, avoids lower leaf, also promotes fine sand precipitation separation in hydrolyzed solution on the other hand out.
In elementary hydrolysis acidification pool and secondary hydrolysis acidification pool, the residence time of feed liquid is all preferably 1 ~ 3 day.The total residence time of 2 ~ 6 days can make the chicken manure of dilution just fully be hydrolyzed, and make the sand of small particle size from chicken manure just separate.
Principle of work of the present invention is: in stirring settling pit, and the material of bulk is just blended by water dilution and churned mechanically mode by chicken manure, is separated the sand removed wherein particle diameter and be greater than 0.6mm.The bacterial classification played a major role in elementary hydrolysis acidification pool and secondary hydrolysis acidification pool is acidication bacterium.Material is mainly hydrolyzed and acidifying two reaction in hydrolysis acidification pool, be hydrolyzed refer to organism enter microorganism cells before, the biochemical reaction that carries out outside born of the same parents.Macromolecule organic such as Mierocrystalline cellulose, starch, protein etc. cannot permeate through cell membranes directly be utilized by cell, microorganism completes biocatalytic reaction by the release outer free enzyme of born of the same parents or the immobilized enzyme be connected on mantle, these macromolecule organics are degraded into water miscible small molecules, such as, Mierocrystalline cellulose is cellobiose and glucose by cellulase hydrolysis, starch is maltose and glucose by Amylase Hydrolysis, and protein is small peptide and amino acid etc. by proteolytic.Souring stage, above-mentioned micromolecular compound is more simple compound at the cellular transformation of fermenting bacteria and is secreted into extracellular, and product comprises voltaile fatty acid, lactic acid, carbonic acid gas, ammonia etc.By the reaction of acidication, microorganism changes the larger molecular organics of wherein difficult for biological degradation the small organic molecule of readily biodegradable into, and in precipitation separation out-feed liquid, particle diameter is less than the sand of 0.6mm in the process.Hydrolysis acidification pool is set to two-stage, defines certain gradient, and what hydrolysis desanding was carried out is more thorough.
The invention has the advantages that: the method for desanding eliminate comparatively up hill and dale chicken manure just in the sand of various particle diameter, the sand content of the feed liquid entering fermentor tank is made to be reduced to less than 2%, greatly reduce the impact of sand on follow-up each link, ensure that with chicken manure just for the steady running of the biogas engineering of raw material.Simultaneously after two-stage hydrolysis, in feed liquid, the macromolecular substance of indissoluble is degraded into solvable small-molecule substance, is easier to methanobacteria and utilizes, improve the efficiency of aerogenesis.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1:
Chicken manure is just poured into and stirs in settling pit, add rinse the sewage of hen house carry out agitation and dilution with this isolate chicken manure just in the sand of greater particle size, stirring velocity is 6r/min, obtain the chicken manure just diluent that total solids level is 10%, this diluent is in gate overflow to elementary hydrolysis acidification pool, the temperature of elementary hydrolysis acidification pool controls to be 18 DEG C, the residence time of feed liquid is 2 days, elementary hydrolysis acidification pool is provided with whipping appts, mixing speed is 16r/min, and every day, diurnally stirred 8 hours.In the secondary hydrolysis acidification pool that feed liquid after elementary hydrolysis sand setting flow into, the hydrolysis temperature in secondary hydrolysis pond controls to be 30 DEG C, and the residence time of feed liquid is 2 days, is provided with whipping appts in pond, mixing speed is 16r/min, stirs 1 hour every 2 hours.After desanding, the sand content in feed liquid is down to 1.99%, directly pumps in anaerobic fermentation tank and ferments, and does not have an impact to fermentation flow process.
Claims (4)
1. the method for a chicken manure just desanding, it is characterized in that chicken manure just to pour into and stir in settling pit, add water to stir, dilution, sand setting, remove particle diameter in ight soil and be greater than the sand of 0.6mm, through stir the upper strata chicken manure after sand setting just diluent overflow in hydrolysis acidification pool, the sand that removing particle diameter is less than 0.6mm is separated in the process of acidication, described hydrolysis acidification pool comprises elementary hydrolysis acidification pool and secondary hydrolysis acidification pool from high to low, the stirring velocity stirring settling pit is 6 ~ 8r/min, the total solids level of chicken manure just after dilution stirred in settling pit is 8 ~ 12%.
2., according to the method for the just desanding of the chicken manure described in claim 1, it is characterized in that the temperature of secondary hydrolysis acidification pool controls to be 26 ~ 30 DEG C.
3., according to the method for the just desanding of the chicken manure described in claim 1, it is characterized in that being provided with whipping appts in secondary hydrolysis acidification pool, mixing speed is 16 ~ 18r/min.
4., according to the method for the just desanding of the chicken manure described in claim 1, it is characterized in that the residence time of feed liquid in secondary hydrolysis acidification pool is 1 ~ 3 day.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602916.4A CN104386890A (en) | 2014-11-02 | 2014-11-02 | Method for removing grit from chicken dung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602916.4A CN104386890A (en) | 2014-11-02 | 2014-11-02 | Method for removing grit from chicken dung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386890A true CN104386890A (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410602916.4A Pending CN104386890A (en) | 2014-11-02 | 2014-11-02 | Method for removing grit from chicken dung |
Country Status (1)
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| CN (1) | CN104386890A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036818A (en) * | 2015-07-16 | 2015-11-11 | 华南理工大学 | Method for removing phosphorus from animal manure containing phosphorus, nitrogen and carbon |
| CN111378560A (en) * | 2020-03-20 | 2020-07-07 | 佛山科学技术学院 | Chicken manure methane power generation system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050113467A1 (en) * | 2001-12-18 | 2005-05-26 | Branson Jerrel D. | System and method for extracting energy from agricultural waste |
| CN101935137A (en) * | 2010-08-30 | 2011-01-05 | 中国农业大学 | Method and device for separating silt in feed solution for methane fermentation |
| CN102603134A (en) * | 2012-03-16 | 2012-07-25 | 山东民和生物科技有限公司 | Two-stage sand removal process for livestock manure |
-
2014
- 2014-11-02 CN CN201410602916.4A patent/CN104386890A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050113467A1 (en) * | 2001-12-18 | 2005-05-26 | Branson Jerrel D. | System and method for extracting energy from agricultural waste |
| CN101935137A (en) * | 2010-08-30 | 2011-01-05 | 中国农业大学 | Method and device for separating silt in feed solution for methane fermentation |
| CN102603134A (en) * | 2012-03-16 | 2012-07-25 | 山东民和生物科技有限公司 | Two-stage sand removal process for livestock manure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036818A (en) * | 2015-07-16 | 2015-11-11 | 华南理工大学 | Method for removing phosphorus from animal manure containing phosphorus, nitrogen and carbon |
| CN105036818B (en) * | 2015-07-16 | 2018-12-11 | 华南理工大学 | A method of for removing dephosphorization from the animal wastes containing phosphorus, nitrogen and carbon |
| CN111378560A (en) * | 2020-03-20 | 2020-07-07 | 佛山科学技术学院 | Chicken manure methane power generation system and method |
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Application publication date: 20150304 |