CN108004030A - The method that biodiesel is prepared using oily sludge two-step method - Google Patents
The method that biodiesel is prepared using oily sludge two-step method Download PDFInfo
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- CN108004030A CN108004030A CN201711148554.6A CN201711148554A CN108004030A CN 108004030 A CN108004030 A CN 108004030A CN 201711148554 A CN201711148554 A CN 201711148554A CN 108004030 A CN108004030 A CN 108004030A
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- sludge
- ester exchange
- method described
- oily sludge
- biodiesel
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/10—Ester interchange
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
-
- 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
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The present invention relates to technical field of biodiesel preparation, more particularly to a kind of method that biodiesel is prepared using oily sludge two-step method, using the oily sludge of municipal sewage plant as raw material, carry out esterification and ester exchange preparing biological diesel oil in situ, mainly include sludge pretreatment, esterification/ester exchange in situ, cooling extraction, cleaning, filtering evaporation and cooling, alkali step of transesterification, to obtain maximum biodiesel production rate.
Description
Technical field
The present invention relates to technical field of biodiesel preparation, and in particular to one kind prepares biology using oily sludge two-step method
The method of diesel oil.
Background technology
What world energy sources crisis now and environmental crisis promoted new clean energy resource is developed into the task of top priority.Utilize cities and towns
Sludge manufacture biodiesel is exactly one of settling mode.The energy contained in the estimated town sewage of expert is Treating Municipal Sewage institute
With ten times of energy, and more than 50% energy contained in town sewage has been transferred in sludge by sewage disposal process,
In sludge containing 10%-20% can ester exchange component, be practicable by sludge preparing biological diesel oil thus.It is another
Aspect, biodiesel as clean regenerative resource, it is put with soybean, rapeseed, sunflower, palm fibre, coconut oil etc. for raw material,
The cost accounts for the 70%-80% of whole biodiesel product totle drilling cost, and the cost of manufacture of this great number hinders biodiesel
Supply, competitive advantage is also lost compared with traditional fossil energy, and triggered the state including crisis in food etc.
Border problem.Under the rare background of Chinese cultivated land, it would be desirable to find the raw material source of more biodiesel.At town sewage
The sludge for managing factory is exactly an extraordinary raw material, its not only aboundresources, continually but also of low cost, can drop significantly
Ensure raw material supply while the production cost of low biodiesel, meanwhile, also solve the problems, such as that Treatment of Sludge is difficult.In city
In the various sludge that sewage treatment plant produces, using oily sludge come preparing biological diesel oil will be it is a kind of more have it is promising should
With compared to primary sludge and secondary sludge, its yield of biodiesel higher, is more advantageous to putting into actual production on a large scale
In.However, in two-step method, the control of selection and alkali ester exchange reaction condition for catalyst still requires study.
The content of the invention
It is an object of the invention to overcome above-mentioned background technology there are the defects of, there is provided one kind utilize oily sludge two-step method
The method for preparing biodiesel, using the oily sludge of municipal sewage plant as raw material, carries out esterification and ester in situ is handed over
Preparing biological diesel oil is changed, to obtain maximum biodiesel production rate.
Technical scheme:The method that biodiesel is prepared using oily sludge two-step method, the oily sludge are led to
Cross esterification and alkali ester exchange reaction in situ and realize that step is as follows：
1), sludge pretreatment：Oily sludge is produced using activated sludge process, solids content is collected and contains greasy dirt for 11 ± 5%
Mud；
2), esterification/ester exchange in situ：Using methanol as acyl acceptor, with sulfuric acid or435 lipase are catalysis
Agent, progress esterification 5-18h in the Xiao Te bottles in the orbital shaker under the conditions of 45-60 DEG C and 4.17Hz, so as to obtain mixed
Close liquid；
3), cool down：Above-mentioned mixed liquor is cooled to room temperature；
4), extract：Extract, collect by the mixed liquor that extractant collects the ester exchange postcooling in situ of hexane
Supernatant；
5), clean：Supernatant is cleaned with cleaning solution, collects upper strata hexane phase；
6), filter, evaporate and cool down：Make filtration apparatus of the above-mentioned hexane mutually by the ALT-201 containing deicer, collect filter
Liquid, to filtrate evaporation process, after the cooling period weighs esterification products, fatty acid methyl ester and acylglycerol is quantified；
7), alkali ester exchange：Using methanol as acyl acceptor, mass concentration 0.3-0.9% sodium hydroxides or potassium hydroxide are made
For catalyst, ester exchange reaction is carried out to above-mentioned product, excessive methanol is removed after reaction, obtains biodiesel product.
The mass ratio of oily sludge and methanol in the step 2), sulfuric acid solution is in the step 1)：Oily sludge:First
Alcohol:Sulfuric acid=1:15.8:0.037.
Add 1% sodium chloride saturated solution in the step 4) in extraction process into mixed liquor.
When the step 2) Central Plains it is bit esterified/ester exchange catalyst be sulfuric acid catalyst when, cleaning solution in the step 5)
Selected from least one of potassium bicarbonate solution and sodium bicarbonate solution, the matter of the potassium bicarbonate solution and sodium bicarbonate solution
It is 2-4% to measure concentration.
When the step 2) Central Plains it is bit esterified/ester exchange catalyst be enzyme catalyst when, cleaning solution makes in the step 5)
Use distilled water.
Cleaning carries out in separatory funnel in the step 5), and wash number is 3-5 times.
Deicer ALT-201 is selected from anhydrous sodium sulfate, anhydrous magnesium sulfate and anhydrous calcium chloride at least in the step 6)
It is a kind of.
Evaporation process carries out in vacuum rotary evaporator in the step 6), and the temperature of the evaporation process is 45-60
DEG C, pressure 0.01-0.02Mpa, time 20-25min.
Alkali ester exchange carries out in the Xiao Te bottles of closing in the step 7), and Xiao Te bottles are placed in adjustable temperature and frequency is
In the orbital shaker of 4.17Hz.
Alcohol ester ratio is 6.5-12 in the step 7):1, react 60-90min at 45-60 DEG C.
Compared with prior art, the present invention has the advantage that：
1st, two-step method preparing biological diesel oil of the present invention, sludge pretreatment using activated sludge process using obtaining containing greasy dirt
Mud, using esterification and ester-interchange method in situ, improve the yield of fatty acid methyl ester, and relative reduction sludge produces biology
The cost of diesel oil, improves reaction efficiency.
2nd, the mixed liquor extraction process after present invention esterification/ester exchange reaction in situ adds sodium chloride saturated solution, with drop
The solubility of low yield thing in the solution, it is as much as possible to obtain product, and can inhibit the generation of emulsification.
3rd, the two-step method preparing biological diesel oil that the present invention uses, the sludge largely produced every year based on municipal sewage plant
Raw material, and then fat content higher, the biodiesel of calorific value higher are produced using oily sludge, while solve sewage treatment plant's production
Pollution problem caused by the sludge possibility gone out.
4th, the method with acid or the two-step method preparing biological diesel oil of enzyme catalyst catalysis that the present invention uses not only contributes to
The biodiesel of higher quality is produced, while also restrained effectively the generation of saponification.
Brief description of the drawings
(a), (b) are respectively secondary precipitation sludge and oily sludge fat when using acid catalyst and enzyme catalyst in Fig. 1
Sour methyl esters conversion ratio contrast.
Fig. 2 is for the alkaline esterification of grease sludge esterification products and its to free fatty (FFA) conversion ratio and fat
The influence of sour methyl esters (FAME) yield：
In figure：FFA (%):The mass fraction of free fatty (oleic acid) in fatty acid methyl ester；
FAME (%):The yield of fatty acid methyl ester；
aAfter acid -esterization reaction 8h in situ；
bAfter rear enzyme -esterization reaction 16h in situ.
Embodiment
Below by specific embodiments and the drawings, the present invention is further illustrated.The embodiment of the present invention is in order to more
Those skilled in the art is more fully understood the present invention well, any limitation is not made to the present invention.
Experimental method used in following embodiments is used in the following embodiments of conventional method unless otherwise specified
Reagent, material etc., unless otherwise specified, be commercially available.
Oily sludge sample is collected from positioned at the eastern suburb sewage treatment plant of Tianjin Dongli District.
Embodiment 1
1. sludge pretreatment
Municipal sewage plant produces oily sludge and secondary precipitation sludge using activated sludge process, is received from these sludge
Collect required oily sludge and secondary precipitation sludge, solids content is 11% in oily sludge.
2. esterification/ester exchange in situ
In the Xiao Te bottles of closing, using mass concentration be 99% methanol as acyl acceptor, respectively with mass concentration be 98%
Sulfuric acid catalyst and435 lipase-catalyzed doses carry out sludge in-situ to oily sludge and secondary precipitation sludge respectively
Esterification/ester exchange, the mass ratio of oily sludge and methanol, sulfuric acid solution are：Oily sludge:Methanol:Sulfuric acid=1:15.8:
0.037,18h is reacted in the Xiao Te bottles in the orbital shaker under the conditions of 45 DEG C and 4.17Hz, after sample starts reaction, is distinguished
Be acquired when when 0,0.5,1,2,4,6,8,10,14,18 is small and 0,0.5,1,2,4,8,16,20,24,28,32,
It is collected when 38h.
3. extraction
Above-mentioned steps reaction after, each sample is cooled to room temperature, with hexane (30ml) for extractant to above-mentioned original position
The mixed liquor collected after esterification/ester exchange carries out 3 extractions, is collected supernatant after extraction, discards subnatant.
1% sodium chloride saturated solution is added in extraction process into mixed liquor.
4. cleaning
For the reaction being catalyzed with acid catalyst, cleaned with sodium acid carbonate 2% and distilled water, until water in phenolphthalein indicator
Divide and keep colourless；
For the reaction being catalyzed using enzyme catalyst, hexane is mutually cleaned using only distilled water；
Cleaning carries out in separatory funnel, and wash number is 3 times.
5. filtering, evaporation and cooling
Make filtration apparatus of the above-mentioned hexane mutually by the anhydrous sodium sulfate containing deicer, collect filtrate to the filtrate evaporated
Reason, evaporation process carry out in vacuum rotary evaporator, and the temperature of the evaporation process is 45 DEG C, pressure 0.01Mpa, the time
For 20min, after cooling, weigh to esterification products, fatty acid methyl ester and acylglycerol are quantified；
6. alkali ester exchange
The mixture of the sour free fatty acids obtained with enzyme catalyst and acylglycerol is utilized respectively for above two,
Catalyst is used as acyl acceptor and 0.5% sodium hydroxide (NaOH) using 99% methanol, ester exchange reaction is carried out, is closing
Xiao Te bottles in carry out, Xiao Te bottles are placed in the orbital shaker that adjustable temperature and frequency are 4.17Hz, and alcohol ester ratio is 6.5:1st, exist
90min is reacted at 45 DEG C.After reaction, in a rotary evaporator by using spin up speed (increase disengagement area), improve
The methods of bath temperature (increase fluid molecule effusion energy), reduction suction pressure (reducing gas molecule quantity), quickly removed
Methanol is measured, and recycles glycerine after separation of the phases.Methyl ester phase, organic phase drying anhydrous sodium sulfate are cleaned with deionized water (80 DEG C)
(Na2SO4) and filter, so as to obtain fatty acid methyl ester and glyceride.(above-mentioned experiment does two groups on oily sludge and secondary heavy
(a), (b) are shown in the parallel laboratory test of shallow lake sludge, experimental result such as Fig. 1.
The aliphatic acid being catalyzed via acid catalyst and enzyme catalyst is observed within two periods of 18h and 38h respectively
Methyl ester content.In both cases, the fatty acid methyl ester conversion ratio of oily sludge reaches peak respectively at 8h and 15h, point
Not Wei 63.9% and 58.7%, but the fatty acid methyl ester conversion ratio of opposite secondary precipitation sludge is respectively 11% and 16%, then may be used
To show that acid catalyst is more preferable to secondary precipitation sludge effect to oily sludge good catalytic activity, enzyme catalyst, but according to Fig. 1
(a) (b) is contrasted, and acid catalyst will approach the catalytic effect of secondary precipitation sludge with the latter after 35h.Oily sludge is contrasted again
With the fatty acid methyl ester conversion ratio of secondary precipitation sludge, the former conversion ratio in the case of two kinds of catalyst is the 6 of the latter respectively
With 3.6 times.This difference is probably caused by the difference of both lipid components.The ratio of lipid composition is to influence fat
The determinant of sour methyl esters yield, because production of biodiesel needs some saponifiable lipids, is particularly glycerine and free fat
Fat acid.Therefore, it is a better choice to select oily sludge production biodiesel.
Embodiment 2
1. sludge pretreatment
Municipal sewage plant produces oily sludge using activated sludge process, collects oily sludge from these sludge, contains
Solids content is 14% in greasy dirt.
2. esterification/ester exchange in situ
In the Xiao Te bottles of closing, using mass concentration be 99% methanol as acyl acceptor, respectively with mass concentration be 98%
Sulfuric acid catalyst and435 lipase-catalyzed doses carry out sludge in-situ esterification/ester exchange to oily sludge, containing greasy dirt
The mass ratio of mud and methanol, sulfuric acid solution is：Oily sludge:Methanol:Sulfuric acid=1:15.8:0.037, it is used as catalysis using sulfuric acid
During agent, 5h is reacted in the Xiao Te bottles in the orbital shaker under the conditions of 60 DEG C and 4.17Hz.
3. extraction
After the reaction, each sample is cooled to room temperature, and the esterification/ester in situ is handed over for extractant with hexane (30ml)
The mixed liquor collected after changing carries out 5 extractions, collects supernatant, subnatant is discarded.1% is added in extraction process into mixed liquor
Sodium chloride saturated solution.
4. cleaning
For the reaction being catalyzed with acid catalyst, cleaned with potassium bicarbonate solution (4%) and distilled water, until phenolphthalein indicates
Water tariff collection is colourless in agent；
For the reaction being catalyzed using enzyme catalyst, hexane is mutually cleaned using only distilled water；
Cleaning carries out in separatory funnel, and wash number is 5 times.
5. filtering, evaporation and cooling
Above-mentioned hexane is set mutually by anhydrous magnesium sulfate containing deicer or the filtration apparatus of anhydrous calcium chloride, to collect filtrate to institute
Filtrate evaporation process is stated, evaporation process carries out in vacuum rotary evaporator, and the temperature of evaporation process is 60 DEG C, and pressure is
0.02Mpa, time 25min, after cooling, weighs esterification products, fatty acid methyl ester and acylglycerol is determined
Amount；
6. alkali ester exchange
The free fatty acids and the mixture of acylglycerol obtained respectively with acid and enzyme catalyst for above two, are adopted
Carried out by the use of 99% (wt) methanol as acyl acceptor, alkali ester exchange in the Xiao Te bottles of closing, according to circumstances select KOH or NaOH
As catalyst, and reacted respectively under following four reaction condition：
(1), KOH 0.9%, alcohol ester is than 6.5:1,60 DEG C, 90 minutes time；
(2), KOH 0.7%, alcohol ester is than 8:1,50 DEG C, 60 minutes time；
(3), NaOH 0.5%, alcohol ester is than 12:1,60 DEG C, 60 minutes time；
(4), NaOH 0.3%, alcohol ester is than 12:1,60 DEG C, the time is 60 minutes；
Molar ratio of the above-mentioned alcohol ester than referring to methanol and free fatty fat and the mixture of acylglycerol.
Tested in the inner Xiao Te bottles closed of orbital vibrator (4.17Hz) of a controllable temperature.After reaction,
In a rotary evaporator by using spin up speed (increase disengagement area), improve bath temperature (increase fluid molecule ease
Go out energy), reduce the methods of suction pressure (reduce gas molecule quantity) and quickly remove excessive methanol, and recycle after separation of the phases
Glycerine.Methyl ester phase, organic phase drying anhydrous sodium sulfate (Na are cleaned with deionized water (80 DEG C)2SO4) and filter, so as to obtain
Fatty acid methyl ester and glyceride.
It is concluded that from this experiment：Can be higher to obtain by the different alkali ester exchange reaction condition of application
Fatty acid methyl ester yield.As shown in Fig. 2, in using the experiment 2 of acid catalyst and experiment 3, the yield of fatty acid methyl ester carries
Rise close to 2%, it means that a part of triacylglycerol conversion is for fatty acid methyl ester.In addition, change the anti-of alkali ester exchange
While answering condition, the free fatty acid content under acid catalyst and enzyme catalyst catalysis significantly reduces, and methyl esters yield is shown
Write and improve, so as to improve the yield and quality of biodiesel.
It should be appreciated that embodiment and example discussed herein simply to illustrate that, to those skilled in the art
For, it can be improved or be converted, and all these modifications and variations should all belong to the protection of appended claims of the present invention
Scope.
Pertinent literature：
[1]Urrutia C,Sangaletti-Gerhard N,Cea M,et al.Two step
esterification-transesterification process of wet greasy sewage sludge for
biodiesel production[J].Bioresource Technology,2016,200:1044.
[2]Olkiewicz M,Fortuny A,Stüber F,et al.Evaluation of Different
Sludges from WWTP as a Potential Source for Biodiesel Production[J].Procedia
Engineering,2012,42(42):634-643.
Claims (10)
1. the method for biodiesel is prepared using oily sludge two-step method, it is characterised in that the oily sludge passes through ester in situ
Change reaction and alkali ester exchange reaction is realized, step is as follows：
1), sludge pretreatment：Oily sludge is produced using activated sludge process, collection solids content is 11 ± 5% oily sludges；
2), esterification/ester exchange in situ：Using methanol as acyl acceptor, with sulfuric acid or435 lipase are catalyst,
Esterification 5-18h is carried out in the Xiao Te bottles in orbital shaker under the conditions of 45-60 DEG C and 4.17Hz, so as to obtain mixed liquor；
3), cool down：Above-mentioned mixed liquor is cooled to room temperature；
4), extract：Above-mentioned mixed liquor after cooling is extracted using hexane as extractant, is collected supernatant；
5), clean：Supernatant is cleaned with cleaning solution, collects upper strata hexane phase；
6), filter, evaporate and cool down：Make filtration apparatus of the above-mentioned hexane mutually by the ALT-201 containing deicer, collect filtrate, it is right
Filtrate evaporation process, after the cooling period weighs esterification products, and fatty acid methyl ester and acylglycerol are quantified；
7), alkali ester exchange：Using methanol as acyl acceptor, mass concentration 0.3-0.9% sodium hydroxides or potassium hydroxide are used as and urge
Agent, carries out ester exchange reaction to above-mentioned product, removes excessive methanol after reaction, obtain biodiesel product.
2. according to the method described in claim 1, it is characterized in that, first in oily sludge and the step 2) in the step 1)
Alcohol, the mass ratio of sulfuric acid solution are：Oily sludge:Methanol:Sulfuric acid=1:15.8:0.037.
3. according to the method described in claim 1, it is characterized in that, added in the step 4) in extraction process into mixed liquor
1% sodium chloride saturated solution.
4. according to the method described in claim 1, it is characterized in that, when the step 2) Central Plains it is bit esterified/ester exchange catalyst
For sulfuric acid catalyst when, cleaning solution is selected from least one of potassium bicarbonate solution and sodium bicarbonate solution in the step 5),
The mass concentration of the potassium bicarbonate solution and sodium bicarbonate solution is 2-4%.
5. according to the method described in claim 1, it is characterized in that, when the step 2) Central Plains it is bit esterified/ester exchange catalyst
For enzyme catalyst when, cleaning solution uses distilled water in the step 5).
6. according to the method described in claim 1, carried out it is characterized in that, being cleaned in the step 5) in separatory funnel, clearly
Number is washed as 3-5 times.
7. according to the method described in claim 1, it is characterized in that, deicer ALT-201 is selected from anhydrous sulphur in the step 6)
At least one of sour sodium, anhydrous magnesium sulfate and anhydrous calcium chloride.
8. according to the method described in claim 1, it is characterized in that, evaporation process is in vacuum rotary evaporator in the step 6)
Middle progress, the temperature of the evaporation process is 45-60 DEG C, pressure 0.01-0.02Mpa, time 20-25min.
9. according to the method described in claim 1, it is characterized in that, alkali ester exchange is in the Xiao Te bottles of closing in the step 7)
Carry out, Xiao Te bottle are placed in adjustable temperature and frequency as in the orbital shaker of 4.17Hz.
10. according to the method described in claim 1, it is characterized in that, alcohol ester ratio is 6.5-12 in the step 7):1, in 45-
60-90min is reacted at 60 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999523A (en) * | 2019-04-12 | 2019-07-12 | 张会 | A kind of highly enriched method of evaporating |
| CN115386433A (en) * | 2021-05-24 | 2022-11-25 | 松本光史 | Method, device and system for treating microbial waste and sewage sludge |
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| CN104004552A (en) * | 2014-05-29 | 2014-08-27 | 中国人民大学 | Method for preparing biodiesel from municipal sludge based on in-situ ester exchange |
| CN105001922A (en) * | 2015-07-22 | 2015-10-28 | 北京信汇生物能源科技有限公司 | Preparation method for biodiesel |
| KR20170099331A (en) * | 2016-02-23 | 2017-08-31 | 한국과학기술원 | Method for Biodiesel Manufacturing using Non-catalytic Esterification Reaction from Microalgae |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101018867A (en) * | 2003-10-02 | 2007-08-15 | 密西西比州立大学 | Production of biodiesel and other valuable chemicals from wastewater treatment plant sludges |
| CN104004552A (en) * | 2014-05-29 | 2014-08-27 | 中国人民大学 | Method for preparing biodiesel from municipal sludge based on in-situ ester exchange |
| CN105001922A (en) * | 2015-07-22 | 2015-10-28 | 北京信汇生物能源科技有限公司 | Preparation method for biodiesel |
| KR20170099331A (en) * | 2016-02-23 | 2017-08-31 | 한국과학기술원 | Method for Biodiesel Manufacturing using Non-catalytic Esterification Reaction from Microalgae |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999523A (en) * | 2019-04-12 | 2019-07-12 | 张会 | A kind of highly enriched method of evaporating |
| CN109999523B (en) * | 2019-04-12 | 2021-06-04 | 张会 | High-concentration evaporation method |
| CN115386433A (en) * | 2021-05-24 | 2022-11-25 | 松本光史 | Method, device and system for treating microbial waste and sewage sludge |
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