CN101781138A - Method for preparing nitrogen-potassium binary compound fertilizer by using molasses-alcoholic waste fermented liquid - Google Patents
Method for preparing nitrogen-potassium binary compound fertilizer by using molasses-alcoholic waste fermented liquid Download PDFInfo
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- CN101781138A CN101781138A CN201010128020A CN201010128020A CN101781138A CN 101781138 A CN101781138 A CN 101781138A CN 201010128020 A CN201010128020 A CN 201010128020A CN 201010128020 A CN201010128020 A CN 201010128020A CN 101781138 A CN101781138 A CN 101781138A
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Abstract
The invention relates to a method for preparing nitrogen-potassium binary compound fertilizer by using molasses-alcoholic waste fermented liquid. The method takes molasses-alcoholic waste fermented liquid as raw material, the waste fermented liquid is fed into an ion exchange column, modified natural zeolite is used as selective absorbent for potassium ions to absorb, ammonium sulfate, ammonium nitrate or ammonium chloride hot solution is used as eluting agent for elution to obtain nitrogen-containing potassium-enriched liquid containing potassium sulfate and ammonium sulfate, potassium nitrate and ammonium nitrate or potassium chloride and ammonium chloride, and the nitrogen-containing potassium-enriched liquid undergoes multi-effect vacuum evaporation, concentration, crystallization, drying and crushing to obtain potassium sulfate and ammonium sulfate, potassium nitrate and ammonium nitrate or potassium chloride and ammonium chloride binary compound fertilizer. The invention has the advantages that the technological process of the method is simple, the industrial production can be realized easily, the raw materials used for production can be obtained easily and the economic benefit is remarkable.
Description
Technical field:
The invention belongs to the light industry technical field, specifically is a kind of method of producing nitrogen-potassium binary compound fertilizer with molasses alcohol waste mash.
Background technology:
Nitrogen-potassium binary compound fertilizer as vitriolate of tartar and ammonium sulfate, saltpetre and ammonium nitrate or Repone K and ammonium chloride etc., is widely used in multiple kinds of crops, can directly use the crop that does not lack phosphorus, also can fit in phosphate fertilizer and mix nitrogen phosphorus potassium Nitrogen, Phosphorus and Potassium.China is the country of a critical shortage potash fertilizer, and the potash fertilizer of domestic production can not satisfy the needs of agriculture production, and a part need be from external import.
Summary of the invention:
The purpose of this invention is to provide a kind of method of producing nitrogen-potassium binary compound fertilizer with molasses alcohol waste mash, present method is through technologies such as absorption, wash-out, multiple-effect evaporation concentrate from the useless mash that molasses-spirit is produced, prepare agricultural nitrogen-potassium binary and change into compound fertilizer, make a marked difference choosing of raw material with existing method.In addition, the useless mash after carrying potassium and handling is eliminated the disadvantageous effect of animal laxative effective, through pervaporation, concentrate, dryly later can make animal-feed, has improved the utility value of useless mash; Produce the present situation that nitrogen-potassium binary compound fertilizer has been alleviated the agricultural potash fertilizer wretched insufficiency of China to a certain extent from molasses alcohol waste mash, have good social benefit, economic benefit and ecological benefits.
The present invention is achieved through the following technical solutions:
Produce the method for nitrogen-potassium binary compound fertilizer with molasses alcohol waste mash, this method is raw material with the molasses alcohol waste mash, the mash that will give up feeds in the ion exchange column, natural zeolite with remodeling adsorbs as the selective adsorbent of potassium ion, use ammonium sulfate then, ammonium nitrate or ammonium chloride hot solution are carried out wash-out as eluent, obtain containing vitriolate of tartar and ammonium sulfate, the nitrogenous rich potassium liquid of saltpetre and ammonium nitrate or Repone K and ammonium chloride, again nitrogenous rich potassium liquid is concentrated through multiple-effect vacuum-evaporation, crystallization, dry, pulverize and obtain vitriolate of tartar and ammonium sulfate, saltpetre and ammonium nitrate or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer, its concrete steps are as follows:
The first step, ammonium type prepare zeolite
Get natural zeolite and sieve, get sieve top, after boiling with saturated sodium chloride solution through the washing back, wash with water, after boiling with saturated ammonium sulfate or ammonium nitrate or ammonium chloride solution again, wash with water, make ammonium type zeolite, this ammonium type zeolite is packed in the stainless steel ion exchange column, standby;
Second step, the preparation of nitrogenous rich potassium liquid
The molasses alcohol waste mash cooling-sedimentation is got later in the ion exchange column that upper strata liquid feeds the natural zeolite that remodeling is housed, temperature is under 10～50 ℃ the situation in ion exchange column, potassium ion in the useless mash is adsorbed, hot solution with ammonium sulfate or ammonium nitrate or ammonium chloride after absorption is finished is incubated wash-out as eluent, obtain containing the nitrogenous rich potassium liquid of ammonium sulfate and vitriolate of tartar, saltpetre and ammonium nitrate or Repone K and ammonium chloride, zeolite is regenerated simultaneously, and water ejected the elutriant in the post after wash-out was finished;
The 3rd step, preparation finished product binary compound fertilizer
With the nitrogenous rich potassium liquid of gained through multiple-effect vacuum-evaporation concentrate, crystallization, drying and obtain vitriolate of tartar and ammonium sulfate binary compound fertilizer, or saltpetre and ammonium nitrate binary compound fertilizer, or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer; The water of condensation that the top water of wash-out after finishing in second step is produced when multiple-effect vacuum-evaporation concentrates in this step all is used for the preparation of next round recycling elution agent, the realization recycle as solvent simultaneously.
The present invention compared with prior art has following beneficial effect:
The product nitrogen potassium binary compound fertilizer that obtains among the present invention reaches compound manure standard GB 15063-2001 middle and high concentration standard-required, and total nutrient content can satisfy the purpose that agricultural is used greater than 40%; Through after the remodeling of natural zeolite is handled, the K uptake of zeolite is reached more than the 30g/L among the present invention; Because the zeolite that uses in the ion exchange column of the present invention just was improved to ammonium type zeolite before the k adsorption ion, and the potassium ion that on to the ammonium type zeolite in the ion exchange column, adsorbs when carrying out wash-out employed eluent be the salt that contains ammonium ion, therefore can realize that wash-out and regeneration finishes in same process, do not need independent regenerative process, be easy to realization of industrialization, adopt the multi-effect evaporation system save energy.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment:
As representing among Fig. 1, molasses alcohol waste mash is through after the cooling-sedimentation, gets a certain amount of upper strata liquid and feeds natural zeolite ion exchange column through remodeling, is in the ammonium type zeolite adsorption post potassium ion to be adsorbed with certain speed.After absorbing process was finished, the top water of using a circulation generation was mixed with eluent with industrial or agricultural ammonium sulfate, ammonium nitrate or ammonium chloride the potassium ion that is adsorbed on the ion exchange column is carried out wash-out, and ion exchange column is regenerated.The elutriant that obtains is nitrogenous rich potassium liquid, through multiple-effect evaporation, concentrate, obtain nitrogen-potassium binary compound fertilizer after crystallization, drying and the pulverizing.Specific embodiment is as follows:
Producing of embodiment one vitriolate of tartar and ammonium sulfate nitrogen-potassium binary compound fertilizer
1. the remodeling of zeolite is handled
Take by weighing 10000 natural zeolites that restrained 20～30 mesh sieves, boil processing after 2 hours through the washing back with saturated sodium chloride solution, wash with water, carry out same processing with saturated ammoniumsulphate soln again, the ammonium type natural zeolite that obtains retrofiting, zeolite is packed in the stainless steel ion exchange column of Φ 50 * 3000mm strap clamp cover, and loading amount is about 4.5 liters, and is standby.
2. prepare nitrogenous rich potassium liquid
The useless mash of flow velocity feeding with 2SV adsorbs for 14 liters from bottom to top in above-mentioned ion exchange column, adsorption temp is 20 ℃, after absorption is finished the useless mash in the ion exchange column is all discharged by the lower end, the fertile composition of potassium content, absorption and wash-out index before and after the absorption and compound sees Table data in.Use the top water that a circulation produces, water of condensation and the industrial sulphuric acid ammonium that produces when multiple-effect vacuum-evaporation concentrates is mixed with eluent, for the first time make water and industrial sulphuric acid ammonium be mixed with eluent during wash-out in the present embodiment, enter circulating process and just can use later a potassium mother liquor and a top water that circulates generation and prepare eluent; The mole number of adjusting ammonium ion in the eluent is 1 times of k adsorption ion mole number in the ion exchange column, the potassium ion that 90 ℃ eluent adsorbs in the wash-out ion exchange column from top to bottom with the flow velocity of 2SV, the consumption of eluent is 2000ml, the wash-out column temperature keeps 90 ℃, when obtaining stopping wash-out behind the nitrogenous rich potassium liquid 2000ml, add top water 500ml again and collect top water liquid 500ml, the preparation process of nitrogenous rich potassium liquid is finished.
Above-mentioned " SV " is the abbreviated form of " space " and " velocity " two first letters of word, the meaning is a space velocity, the multiple that promptly per hour is equivalent to post mesolite volume by the useless mash of exchange column, the volume that per hour is meant the useless mash by 4.5 liters of zeolites as the 2SV in the present embodiment is about 4.5 * 2 liters, promptly per hour by 9 liters of useless mash.
3. preparation finished product vitriolate of tartar and ammonium sulfate nitrogen-potassium binary change into compound fertilizer
With the nitrogenous rich potassium liquid of the 2000ml that obtains in the said process through 100 ℃ of vacuum-evaporation, concentrate, crystallization, drying and pulverizing obtain 348.3 gram compound fertilizer, composition analysis shows, the content sum of total nitrogen and potassium oxide is 46.5% in this compound fertilizer, and reach compound manure standard GB 15063-2001 middle and high concentration standard-required: total nutrient content is greater than 40%.
Table one material table
Embodiment dinitric acid potassium and ammonium nitrate nitrogen-potassium binary change into producing of compound fertilizer
1. the remodeling of zeolite is handled
Take by weighing 10000 natural zeolites that restrained 30～40 mesh sieves, boil processing after 2 hours through the washing back with saturated sodium chloride solution, wash with water, carry out same processing with saturated ammonium nitrate solution again, the ammonium type natural zeolite that obtains retrofiting, zeolite is packed in the stainless steel ion exchange column of Φ 50 * 3000mm strap clamp cover, and loading amount is about 4.5 liters, and is standby.
2. prepare nitrogenous rich potassium liquid
The useless mash of flow velocity feeding with 3SV adsorbs for 16 liters from bottom to top in above-mentioned ion exchange column, adsorption temp is 30 ℃, after absorption is finished the useless mash in the ion exchange column is all discharged by the lower end, the fertile composition of potassium content, absorption and wash-out index before and after the absorption and compound sees Table data in two.Use the top water that a circulation produces, water of condensation and the agricultural ammonium nitrate that produces when multiple-effect vacuum-evaporation concentrates is mixed with eluent, the mole number of adjusting ammonium ion in the eluent is 2 times of k adsorption ion mole number in the ion exchange column, the potassium ion that 80 ℃ eluent adsorbs in the wash-out ion exchange column from top to bottom with the flow velocity of 3.5SV, the consumption of eluent is 2000ml, the wash-out column temperature keeps 80 ℃, when obtaining stopping wash-out behind the nitrogenous rich potassium liquid 2000ml, add top water 500ml again and collect top water liquid 500ml, the preparation process of nitrogenous rich potassium liquid is finished.
3. preparation finished product saltpetre and ammonium nitrate nitrogen-potassium binary change into compound fertilizer
With the nitrogenous rich potassium liquid of the 2000ml that obtains in the said process through 80 ℃ of vacuum-evaporation, concentrate, crystallization, drying and pulverizing obtain 477.4 gram compound fertilizer, composition analysis shows, the content sum of total nitrogen and potassium oxide is 53.6% in this compound fertilizer, and reach compound manure standard GB 15063-2001 middle and high concentration standard-required: total nutrient content is greater than 40%.
Table two material table
Producing of embodiment arsenic butter and ammonium chloride nitrogen-potassium binary compound fertilizer
1. the remodeling of zeolite is handled
Take by weighing 10000 natural zeolites that restrained 30～40 mesh sieves, boil processing after 2 hours through the washing back with saturated sodium chloride solution, wash with water, carry out same processing with saturated ammonium chloride solution again, the ammonium type natural zeolite that obtains retrofiting, zeolite is packed in the stainless steel ion exchange column of Φ 50 * 3000mm strap clamp cover, and loading amount is about 4.5 liters, and is standby.
2. prepare nitrogenous rich potassium liquid
The useless mash of flow velocity feeding with 1SV adsorbs for 15 liters from bottom to top in above-mentioned ion exchange column, adsorption temp is 30 ℃, after absorption is finished the useless mash in the ion exchange column is all discharged by the lower end, the fertile composition of potassium content, absorption and wash-out index before and after the absorption and compound sees Table data in three.Use the top water that a circulation produces, water of condensation and the industrial ammonium chloride that produces when multiple-effect vacuum-evaporation concentrates is mixed with eluent, the mole number of adjusting ammonium ion in the eluent is 1.5 times of k adsorption ion mole number in the ion exchange column, the potassium ion that 80 ℃ eluent adsorbs in the wash-out ion exchange column from top to bottom with the flow velocity of 3.5SV, the consumption of eluent is 2000ml, the wash-out column temperature keeps 80 ℃, when obtaining stopping wash-out behind the nitrogenous rich potassium liquid 2000ml, add top water 500ml again and collect top water liquid 500ml, the preparation process of nitrogenous rich potassium liquid is finished.
3. preparation finished product Repone K and ammonium chloride nitrogen-potassium binary change into compound fertilizer
With the nitrogenous rich potassium liquid of the 2000ml that obtains in the said process through 120 ℃ of vacuum-evaporation, concentrate, crystallization, drying and pulverizing obtain 358.6 gram compound fertilizer, composition analysis shows, the content sum of total nitrogen and potassium oxide is 50.0% in this compound fertilizer, and reach compound manure standard GB 15063-2001 middle and high concentration standard-required: total nutrient content is greater than 40%.
Table 3 material table
Claims (3)
1. produce the method for nitrogen-potassium binary compound fertilizer with molasses alcohol waste mash, it is characterized in that with the molasses alcohol waste mash being raw material, the mash that will give up feeds in the ion exchange column, natural zeolite with remodeling adsorbs as the selective adsorbent of potassium ion, use ammonium sulfate then, ammonium nitrate or ammonium chloride hot solution are carried out wash-out as eluent, obtain containing vitriolate of tartar and ammonium sulfate, the nitrogenous rich potassium liquid of saltpetre and ammonium nitrate or Repone K and ammonium chloride, again nitrogenous rich potassium liquid is concentrated through multiple-effect vacuum-evaporation, crystallization, dry, pulverize and obtain vitriolate of tartar and ammonium sulfate, saltpetre and ammonium nitrate or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer, concrete steps are as follows:
The first step, ammonium type prepare zeolite
Get natural zeolite and sieve, get sieve top, after boiling with saturated sodium chloride solution through the washing back, wash with water, after boiling with saturated ammonium sulfate or ammonium nitrate or ammonium chloride solution again, wash with water, make ammonium type zeolite, this ammonium type zeolite is packed in the stainless steel ion exchange column, standby;
Second step, the preparation of nitrogenous rich potassium liquid
The molasses alcohol waste mash cooling-sedimentation is got later in the ion exchange column that upper strata liquid feeds the natural zeolite that remodeling is housed, temperature is under 10～50 ℃ the situation in ion exchange column, potassium ion in the useless mash is adsorbed, hot solution with ammonium sulfate or ammonium nitrate or ammonium chloride after absorption is finished is incubated wash-out as eluent, obtain containing the nitrogenous rich potassium liquid of ammonium sulfate and vitriolate of tartar, saltpetre and ammonium nitrate or Repone K and ammonium chloride, zeolite is regenerated simultaneously, and water ejected the elutriant in the post after wash-out was finished;
The 3rd step, preparation finished product binary compound fertilizer
With the nitrogenous rich potassium liquid of gained through multiple-effect vacuum-evaporation concentrate, crystallization, drying and obtain vitriolate of tartar and ammonium sulfate binary compound fertilizer, or saltpetre and ammonium nitrate binary compound fertilizer, or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer; Simultaneously with the top water of wash-out after finishing and the water of condensation that when multiple-effect vacuum-evaporation concentrates, produces in this step in second step, be used for the preparation of next round recycling elution agent as solvent, realize recycle.
2. according to claim 1ly produce the method for potash fertilizer, it is characterized in that concrete steps are as follows with molasses alcohol waste mash:
The first step, ammonium type prepare zeolite
Get natural zeolite and cross 10～60 mesh sieves, get sieve top, after process washing back is boiled 1～3 hour with saturated sodium chloride solution, wash with water, after boiling 1～3 hour with saturated ammonium sulfate or ammonium nitrate or ammonium chloride solution again, wash with water, make ammonium type zeolite, it is standby in the stainless steel ion exchange column of Φ 50 * 3000mm strap clamp cover that this ammonium type zeolite is packed into, and the ratio of volume that makes the quality of dried zeolite and useless mash is between 1: 1～5 grams per milliliters;
Second step, the preparation of nitrogenous rich potassium liquid
With molasses alcohol waste mash through after being cooled to normal temperature and sedimentation, getting 12-16 goes up layer liquid and feeds with the flow velocity of 0.5～6SV from bottom to top or from top to bottom and carry out in the ion exchange column that ammonium type zeolite is housed adsorbing first time, adsorption temp is 10～50 ℃, after absorption is finished the useless mash in the ion exchange column is all discharged by the lower end; Getting ammonium sulfate or ammonium nitrate or ammonium chloride then is dissolved in the 1500-2500ml water and is mixed with eluent, the mole number of adjusting ammonium ion in the eluent is 1～3 times of k adsorption ion mole number in the selective adsorption post, this eluent is heated to 40～90 ℃, obtains the eluent hot solution; The eluent hot solution is carried out wash-out to the potassium ion that adsorbs in the ion exchange column from top to bottom with the flow velocity of 0.5～10SV, in chuck, lead to hot water simultaneously, make the temperature of ion exchange column in elution process remain on 40～90 ℃, when obtaining stopping wash-out behind the nitrogenous rich potassium liquid 1500-2500ml, add top water 400-600ml again and collect top water liquid 400-600ml, the preparation process of nitrogenous rich potassium liquid is finished, and the zeolite in the ion exchange column is regenerated simultaneously;
The 3rd step, preparation finished product binary compound fertilizer
With the second nitrogenous rich potassium liquid of 2000ml that obtains of step through 80～120 ℃ of vacuum-evaporation, concentrate, obtain vitriolate of tartar and ammonium sulfate binary compound fertilizer after crystallization, drying and the pulverizing, or saltpetre and ammonium nitrate binary compound fertilizer, or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer; Simultaneously with the top water of wash-out after finishing and the water of condensation that when multiple-effect vacuum-evaporation concentrates, produces in this step in second step, be used for the preparation of next round recycling elution agent as solvent, realize recycle.
3. according to claim 2ly produce the method for potash fertilizer, it is characterized in that concrete steps are as follows with molasses alcohol waste mash:
The first step, ammonium type prepare zeolite
Get natural zeolite and cross 20～30 mesh sieves, get sieve top, after process washing back is boiled 2 hours with saturated sodium chloride solution, wash with water, boil 2 hours with saturated ammonium sulfate or ammonium nitrate or ammonium chloride solution again after, wash with water, make ammonium type zeolite, this ammonium type zeolite is packed in the stainless steel ion exchange column of Φ 50 * 3000mm strap clamp cover, and loading amount is 4.5 liters, and is standby;
Second step, the preparation of nitrogenous rich potassium liquid
The molasses alcohol waste mash that with potassium content is 11.5～11.7 grams per liters is through after being cooled to normal temperature and sedimentation, getting 14 goes up layer liquid and feeds with the flow velocity of 1～3SV from bottom to top or from top to bottom and carry out in the ion exchange column that ammonium type zeolite is housed adsorbing first time, adsorption temp is 20 ℃, after absorption is finished the useless mash in the ion exchange column is all discharged by the lower end; Get ammonium sulfate or ammonium nitrate or ammonium chloride then and be dissolved in the 2000ml water and be mixed with eluent, wherein ammonium sulfate, ammonium nitrate or the ammonium chloride concentration of per-cent in eluent is controlled at 10～30%, and this eluent is heated to 90 ℃, obtains the eluent hot solution; The eluent hot solution is carried out wash-out to the potassium ion that adsorbs in the ion exchange column from top to bottom, in chuck, lead to hot water simultaneously, make the temperature of ion exchange column in elution process remain on 90 ℃, when obtaining stopping wash-out behind the nitrogenous rich potassium liquid 2000ml, add top water 500ml again and collect top water liquid 500ml, the preparation process of nitrogenous rich potassium liquid is finished, and the zeolite in the ion exchange column is regenerated simultaneously;
The 3rd step, preparation finished product binary compound fertilizer
With the second nitrogenous rich potassium liquid of 2000ml that obtains of step through 100 ℃ of vacuum-evaporation, the content sum that concentrates, obtain after crystallization, drying and the pulverizing total nitrogen and potassium oxide is vitriolate of tartar and ammonium sulfate binary compound fertilizer more than 45%, or saltpetre and ammonium nitrate binary compound fertilizer, or Repone K and ammonium chloride nitrogen-potassium binary compound fertilizer; Simultaneously with the top water of wash-out after finishing and the water of condensation that when multiple-effect vacuum-evaporation concentrates, produces in this step in second step, be used for the preparation of next round recycling elution agent as solvent, realize recycle.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193521A (en) * | 2013-04-10 | 2013-07-10 | 昆明康禄生物科技有限公司 | Method for preparing fertilizer effect type molasses alcohol waste mash bacterial liquid through triple fermentation |
| CN104030735A (en) * | 2014-07-07 | 2014-09-10 | 云南省轻工业科学研究院 | Preparation method of high-concentration water-soluble plant potash fertilizer |
| CN106220285A (en) * | 2016-08-10 | 2016-12-14 | 云南省轻工业科学研究院 | The method producing Liquid Fertilizer from alcohol waste mash |
| US10683211B2 (en) | 2015-09-10 | 2020-06-16 | Council Of Scientific & Industrial Research | Process for potash recovery from biomethanated spent wash with concomitant environmental remediation of effluent |
| US10793480B2 (en) | 2017-02-27 | 2020-10-06 | Council Of Scientific & Industrial Research | Process for the preparation of potassic fertiliser from alcohol distillery effluent (spent wash) |
| WO2023111784A1 (en) * | 2021-12-13 | 2023-06-22 | Mistry Mukul | A novel isolation process of potash from spent wash |
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| JPS6236094A (en) * | 1985-04-22 | 1987-02-17 | ト−ア化成株式会社 | Bad smell reducing method |
| CN1480430A (en) * | 2002-09-04 | 2004-03-10 | 莫志鸿 | Liquid fertilizer made from waste fluid of molasses and alcohol as well as its preparing method |
| CN1962561A (en) * | 2006-11-24 | 2007-05-16 | 王兆良 | Raw material for producing liquid fertilizer |
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2010
- 2010-03-19 CN CN2010101280209A patent/CN101781138B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6236094A (en) * | 1985-04-22 | 1987-02-17 | ト−ア化成株式会社 | Bad smell reducing method |
| CN1480430A (en) * | 2002-09-04 | 2004-03-10 | 莫志鸿 | Liquid fertilizer made from waste fluid of molasses and alcohol as well as its preparing method |
| CN1962561A (en) * | 2006-11-24 | 2007-05-16 | 王兆良 | Raw material for producing liquid fertilizer |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193521A (en) * | 2013-04-10 | 2013-07-10 | 昆明康禄生物科技有限公司 | Method for preparing fertilizer effect type molasses alcohol waste mash bacterial liquid through triple fermentation |
| CN103193521B (en) * | 2013-04-10 | 2014-08-27 | 昆明康禄生物科技有限公司 | Method for preparing fertilizer effect type molasses alcohol waste mash bacterial liquid through triple fermentation |
| CN104030735A (en) * | 2014-07-07 | 2014-09-10 | 云南省轻工业科学研究院 | Preparation method of high-concentration water-soluble plant potash fertilizer |
| US10683211B2 (en) | 2015-09-10 | 2020-06-16 | Council Of Scientific & Industrial Research | Process for potash recovery from biomethanated spent wash with concomitant environmental remediation of effluent |
| CN106220285A (en) * | 2016-08-10 | 2016-12-14 | 云南省轻工业科学研究院 | The method producing Liquid Fertilizer from alcohol waste mash |
| US10793480B2 (en) | 2017-02-27 | 2020-10-06 | Council Of Scientific & Industrial Research | Process for the preparation of potassic fertiliser from alcohol distillery effluent (spent wash) |
| WO2023111784A1 (en) * | 2021-12-13 | 2023-06-22 | Mistry Mukul | A novel isolation process of potash from spent wash |
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