CN102120959A - Method for preparing biogas by fermenting exhausted tea - Google Patents
Method for preparing biogas by fermenting exhausted tea Download PDFInfo
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- CN102120959A CN102120959A CN2010105874121A CN201010587412A CN102120959A CN 102120959 A CN102120959 A CN 102120959A CN 2010105874121 A CN2010105874121 A CN 2010105874121A CN 201010587412 A CN201010587412 A CN 201010587412A CN 102120959 A CN102120959 A CN 102120959A
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- 238000000034 method Methods 0.000 title claims abstract description 30
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003337 fertilizer Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000005273 aeration Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
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- 239000012467 final product Substances 0.000 claims description 3
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- 238000010248 power generation Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
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- 230000004151 fermentation Effects 0.000 description 16
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- 229910052739 hydrogen Inorganic materials 0.000 description 3
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- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 1
- 230000000749 insecticidal effect Effects 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
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- 210000004681 ovum Anatomy 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Fertilizers (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for preparing biogas by fermenting exhausted tea, belonging to the field of biomass energy. The invention aims to provide a brand-new method for treating the exhausted tea, in particular relating to a method for preparing biogas by fermenting exhausted tea, comprising the following steps: A, mixing the exhausted tea with water; and B reacting under an anaerobic condition, thus preparing the biogas. Because the production process of tea polyphenol can also be used for producing a large amount of waste water, the exhausted tea and the waste water can be comprehensively utilized to realize waste utilization, energy conservation and emission reduction. By treating the exhausted tea and the waste water by the method, each kilogram of exhausted tea can consume at least 2 kilograms of waste water and produce about 0.12m<3> of biogas with the heat value of 20000-23000KJ/m<3>, which is equal to 0.7 kilogram of fire coal. The produced biogas can be used for living, production and power generation, and the biogas residue and biogas slurry can be used as fertilizers.
Description
Technical field
The invention belongs to the biomass energy source domain, be specifically related to a kind of method of utilizing useless tea grounds ferment preparation of sludge gas.
Background technology
From tealeaves, can produce a large amount of useless tea grounds and waste water in the production technique of extraction tea-polyphenol, extract the classical technical process of tea-polyphenol and see Fig. 1.Useless tea grounds can be sold dry back, but because of useless tea grounds does not have application prospect, and price is cheap and be difficult to sell, and the drying cost height, so that value is sold in dry back is not high, generally adopts landfill disposal.Waste water need be handled after up to standard and could discharge, and processing cost is higher.
In order to administer and effectively to utilize useless tea grounds, reduce environmental pollution, the present inventor desires to provide a kind of new method to handle useless tea grounds.
Summary of the invention
Technical problem solved by the invention provides a kind of new method and handles useless tea grounds.
Concrete, be to utilize useless tea grounds ferment preparation of sludge gas, method is as follows:
A, the useless tea grounds of mixing and water;
B, reaction under anaerobic make biogas.
Owing to also can produce a large amount of waste water in the tea-polyphenol production process, preferably adopt this part waste water in the A step, the present invention can fully utilize useless tea grounds and waste water, realizes utilization of waste material, energy-saving and emission-reduction.
The present invention utilizes in the method for useless tea grounds ferment preparation of sludge gas, to influential committed step of aerogenesis and parameter is:
1, the weight proportion relation of useless tea grounds and waste water is: 1～2: 1～8.
The load of methane-generating pit embodies with fermentation raw material concentration usually, and suitable dry substance concentration is 3%～18%, and promptly the fermentation raw material water content is 82%～97%.Fermentation concentration changes along with variation of temperature.Excessive concentration or low excessively all is unfavorable for biogas fermentation: excessive concentration, and then water content is very few, and fermentation raw material is difficult for decomposing, and accumulates a large amount of acidic substance easily, is unfavorable for the growth and breeding of biogas bacterium, influences normal gas producing; Concentration is low excessively, and then water content is too much, and the organic content in the unit volume reduces relatively, and gas production rate also can reduce, and is unfavorable for making full use of of methane-generating pit.Therefore through screening, the inventive method adopts the weight proportion relation of useless tea grounds and waste water to be: 1～2: 1～8.
2, the mixture (hereinafter to be referred as material liquid) of useless tea grounds of pre-treatment and waste water under before anaerobic reaction.That is:
(1) aeration.
By the aeration tank aeration, material liquid is mixed, and utilize reaction heat to play the effect of heating.
(2) regulate pH to 6～8, carbon-nitrogen ratio 15～40: 1.
Above-mentioned regulate process is to finish in equalizing tank, its objective is:
At first, because discharged waste water is inhomogeneous, the flow rate fluctuation of different workshop sections different time is bigger, so with stopping 10～50 minutes in the material liquid introducing equalizing tank, can guarantee that material liquid mixes fully in equalizing tank; Secondly, raw material carries out acidification in equalizing tank, and assorted gas is discharged, and makes potential of hydrogen moderate, finally controls its pH to 6～8; At last, adjusting carbon-nitrogen ratio to 15～40: 1 is so that ferment under proper speed.If carbon-nitrogen ratio is out of proportion, the vital movement of aerogenesis and microorganism is affected.
3, the inventive method is at following anaerobic condition bottom fermentation, and under anaerobic, lasting stirring condition, the control leavening temperature is in 10～40 ℃ of scopes, and the pH value is controlled at 6～8.Effective aerogenesis under these conditions, reason is:
(1) continue to stir: facts have proved that suitable stirring means and intensity can make fermentation raw material be evenly distributed, the enhancing microorganism contacts with raw material, makes it to obtain the chance increase of nutritive substance, increased activity, and growth and breeding is vigorous, thereby improves gas production rate.Stir and to smash crust again, improve utilization ratio of raw materials and effciency of energy transfer, be beneficial to bubble and discharge.
Simultaneously, tea grounds belongs to high fibre fractionation, and difficulties such as input and output material difficulty, difficulty are decomposed, factor of created gase is low are arranged in anaerobic fermentation process.Realize dynamic fermentation by continuing to stir, improved decomposition efficiency.Feed liquid fully contacts with biological bacteria when motion, and under equal conditions, whether lasting stirring more or not and made anaerobic reaction efficient improve more than 20%.
(2) strictly anaerobic condition: methanogen can only could be grown in the environment of strictly anaerobic, so reactive system wants strictness airtight, water-tight, air tight.
(3) temperature range: the inventive method is controlled at 10～40 ℃ with temperature of reaction, and contriver region of living in utilizes normal temperature fermentation to get final product, and as envrionment temperature change is arranged, and controlled temperature to respective range gets final product.
(4) pH scope: show that after measured potential of hydrogen is between pH=6～8, but equal aerogenesis.Because biogas microbial growth, breeding require the potential of hydrogen of fermentation raw material to keep neutral, perhaps little meta-acid, alkalescence, are crossed alkali and all can be influenced aerogenesis peracid.
Behind above-mentioned anaerobic condition bottom fermentation, obtain three kinds of products: biogas, natural pond liquid, natural pond slag.Gained biogas is stored standby after water seal, desulfurization, dehydration purifying treatment, as adopting the liquid packing water seal, adopts the desulfurization of desulfurization dewatering device, dehydration, adopts the gas storage device air storage.It is standby that gained natural pond liquid is derived the back storage, can be used as farmland or greening fertilising, desinsection.Gained natural pond slag will regularly be discharged, and can be used as fertilizer after the drying and back to the field to use.
The present invention utilizes the method for useless tea grounds fermentation to have the following advantages:
1, handle useless tea grounds and waste water by aforesaid method, the useless tea grounds of per kilogram can consume at least 2 kilograms of waste water, produces the about 0.12m of biogas
3, calorific value is 20000～23000KJ/m
3, be equivalent to 0.7 kilogram of fire coal.Gained biogas can be life, production, generating is used.
2, the natural pond liquid that behind anaerobically fermenting, obtains, the worm's ovum majority of parasite and insect is killed, and has reduced the disease and pest source; Moreover, also contain insecticidal constituents such as indolylacetic acid, red rosy clouds element in the liquid of natural pond, can effectively kill insects such as aphid, red spider, therefore natural pond liquid can be used to spray flowers, nursery, fruit tree etc., thereby reduce the agricultural chemicals usage quantity.
3, the biogas residue and biogas liquid advantage of making fertilizer has: not only kept organism and decomposed the various nutrients that the back is generated, be rich in elements such as N, P, K, Ca, Mo, Zn, Fe, Mn, also containing various active materials such as growth hormone, VITAMIN, organic acid, amino acid, promptly 1) organotrophy combines with inorganic nutrients; 2) macroelement combines with micro-; 3) fertilizer efficiency combines with drug effect; 4) quick-actingly combine with slow; 5) the plant materials endoenzyme activates and combines with soil fertility validity; In the past few years stood market test, existing at home a plurality of demonstration pilot projects, plant experimentally variety of crops 30 of yellow fruit, cotton, rape, peanut, tealeaves, paddy rice, wheats etc. are arranged, experimental result through big area, long period shows: drop into chemical fertilizer of equal value relatively with using, vegetables volume increase 15～30%, food crop volume increase 5～15%, cash crop volume increase 15～20%.And crop anti-adversity strengthens, and disease and pest reduces, and product quality improves, anti-storage.This fertilizer is present unique efficient organic fertilizer with insect protected disease-proof functions, and it not only makes increases in grain production, also can realize grain security, improves grain quality, is subjected to users and peasant's welcome deeply.
Description of drawings
Fig. 1 extracts the classical technical process of tea-polyphenol
Fig. 2 the present invention utilizes the technical process of useless tea grounds fermentation.
Embodiment
The invention provides and utilize the method (reaction process is seen Fig. 2) of useless tea grounds fermentation as follows:
A, the useless tea grounds of mixing and waste water;
B, reaction under anaerobic make biogas.
Before anaerobic reaction, need carry out the pre-treatment that (1) aeration tank aeration and (2) equalizing tank are regulated pH to 6～8, carbon-nitrogen ratio 15～40: 1.
Concrete, the present invention is the USR anaerobic reactor that adopts the fermentation field commonly used at anaerobic reaction, in anaerobic, continue under the condition of stirring, the control leavening temperature in 10～40 ℃ of scopes, the pH value be controlled at react under 6～8 the condition biogas, natural pond liquid, natural pond slag.
The embodiment of form is described in further detail foregoing of the present invention again by the following examples.
Embodiment 1
To handle back waste residue and mixed in aeration tank the aeration of waste water through removal of impurities, and after half an hour mixed liquid be introduced equalizing tank and store and mix back adjusting pH=7, carbon-nitrogen ratio=25: 1 half an hour according to 1: 4.Introduce USR reactor anaerobically fermenting, continue to stir, the pH value is controlled at 6～8, normal-temperature reaction.The output of second day record biogas.Continue according to this condition charging ten days.Collect natural pond liquid and natural pond slag simultaneously as fertilizer.According to the dried tea grounds gas production rate of this condition per kilogram is 0.14-0.16m
3/ kg.
Embodiment 2
To handle back waste residue and mixed in aeration tank the aeration of waste water through removal of impurities, and after half an hour mixed liquid be introduced equalizing tank and store and mix back adjusting pH=6.5, carbon-nitrogen ratio=30: 1 half an hour according to 2: 1.Introduce USR reactor anaerobically fermenting, continue to stir, the pH value is controlled at 6～8, normal-temperature reaction.The output of second day record biogas.Continue according to this condition charging ten days.Collect natural pond liquid and natural pond slag simultaneously as fertilizer.According to the dried tea grounds gas production rate of this condition per kilogram is 0.07-0.08m
3/ kg.
Embodiment 3
To handle back waste residue and mixed in aeration tank the aeration of waste water through removal of impurities, and after half an hour mixed liquid be introduced equalizing tank and mix back adjusting pH=7.5, carbon-nitrogen ratio=35: 1 half an hour according to 1: 7.Introduce USR reactor anaerobically fermenting, continue to stir, the pH value is controlled at 6～8, normal-temperature reaction.The output of second day record biogas.Continue according to this condition charging ten days.Collect natural pond liquid and natural pond slag simultaneously as fertilizer.According to this condition per kilogram tea grounds gas production rate is 0.16-0.18m
3/ kg.
Claims (8)
1. utilize the method for useless tea grounds ferment preparation of sludge gas, it is characterized in that: it is made up of following steps:
A, the useless tea grounds of mixing and water;
B, reaction under anaerobic make biogas.
2. the method for the useless tea grounds ferment preparation of sludge gas of utilization according to claim 1 is characterized in that: the weight proportion relation of useless tea grounds and water is: 1～2: 1～8.
3. the method for the useless tea grounds ferment preparation of sludge gas of utilization according to claim 1 is characterized in that: the mixture of useless tea grounds of pre-treatment and water under before anaerobic reaction:
(1) aeration;
(2) regulate pH to 6～8, carbon-nitrogen ratio 15～40: 1.
4. according to the method for the useless tea grounds ferment preparation of sludge gas of each described utilization of claim 1-3, it is characterized in that: described water is waste water.
5. the method for the useless tea grounds ferment preparation of sludge gas of utilization according to claim 1, it is characterized in that: the described reaction under anaerobic of step B is: under anaerobic, lasting stirring condition, the control leavening temperature is in 10～40 ℃ of scopes, and the pH value is controlled at 6～8.
6. according to the method for the useless tea grounds ferment preparation of sludge gas of each described utilization of claim 1-5, it is characterized in that: the described reaction under anaerobic of step B is to react in the USR reactor.
7. according to the method for the useless tea grounds ferment preparation of sludge gas of each described utilization of claim 1-6, it is characterized in that: after obtaining biogas, after water seal, dehydration, desulfurization are handled, store and get final product.
8. fertilizer is characterized in that: it is natural pond slag or the natural pond liquid that the method reaction by the useless tea grounds ferment preparation of sludge gas of each described utilization of claim 1-7 obtains, or the mixture of natural pond liquid and natural pond slag.
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| CN2010105874121A CN102120959A (en) | 2010-12-14 | 2010-12-14 | Method for preparing biogas by fermenting exhausted tea |
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| CN2010105874121A CN102120959A (en) | 2010-12-14 | 2010-12-14 | Method for preparing biogas by fermenting exhausted tea |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963844A (en) * | 2019-12-23 | 2020-04-07 | 遵义陆圣康源科技开发有限责任公司 | Organic fertilizer based on tea polyphenol extraction waste and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891677A (en) * | 2006-02-10 | 2007-01-10 | 中国科学院遗传与发育生物学研究所 | Apple residue comprehensive utilizing and treating method |
| JP2007289946A (en) * | 2006-03-31 | 2007-11-08 | Ebara Corp | Anaerobic treatment process and device of organic solid waste |
| CN101298395A (en) * | 2007-04-30 | 2008-11-05 | 西南大学 | Citrus peel pomace anaerobic fermentation processing method |
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2010
- 2010-12-14 CN CN2010105874121A patent/CN102120959A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891677A (en) * | 2006-02-10 | 2007-01-10 | 中国科学院遗传与发育生物学研究所 | Apple residue comprehensive utilizing and treating method |
| JP2007289946A (en) * | 2006-03-31 | 2007-11-08 | Ebara Corp | Anaerobic treatment process and device of organic solid waste |
| CN101298395A (en) * | 2007-04-30 | 2008-11-05 | 西南大学 | Citrus peel pomace anaerobic fermentation processing method |
Non-Patent Citations (4)
| Title |
|---|
| B.GOEL ET AL.: "Two-phase anaerobic digestion of spent tea leaves for biogas and manure generation", 《BIORESOURE TECHNOLOGY》, vol. 80, 31 December 2001 (2001-12-31), pages 153 - 156 * |
| TANUSRI MANDAL ET AL.: "COMPARATIVE STUDY OF BIOGAS PRODUCTION FROM DIFFERENT WASTE MATERIALS", 《ENERGY CONVERSION AND MANAGEMENT》, vol. 38, no. 7, 31 December 1997 (1997-12-31), pages 679 - 683, XP004053003, DOI: 10.1016/S0196-8904(96)00078-7 * |
| 伍均锋: "《农村实用新技术与农业政策》", 30 September 2006, 天津科学技术出版社, article "沼渣、沼液的综合利用", pages: 342-346 * |
| 董巨威 等: "升流式厌氧固体反应器的研究进展", 《河南科技》, no. 3, 31 December 2007 (2007-12-31), pages 38 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963844A (en) * | 2019-12-23 | 2020-04-07 | 遵义陆圣康源科技开发有限责任公司 | Organic fertilizer based on tea polyphenol extraction waste and preparation method thereof |
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Application publication date: 20110713 |