CN113493280A - Method for treating spirulina culture waste liquid by evaporation method - Google Patents
Method for treating spirulina culture waste liquid by evaporation method Download PDFInfo
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- CN113493280A CN113493280A CN202110792657.6A CN202110792657A CN113493280A CN 113493280 A CN113493280 A CN 113493280A CN 202110792657 A CN202110792657 A CN 202110792657A CN 113493280 A CN113493280 A CN 113493280A
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- spirulina
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to the technical field of spirulina culture, and discloses a method for treating spirulina culture waste liquid by an evaporation method, which comprises the following treatment steps: (1) putting the cultured waste liquid in the open air or in a ventilated state for water evaporation to obtain a dried substance mixed by mineral substances and biomass; (2) burning the dried substance to remove biomass, wherein the main components in the burnt ash are baking soda and heavy metals; (3) removing heavy metals from the ash to obtain recyclable baking soda; 70% NaHCO in spirulina culture ingredients3The method has the advantages that the method is recycled, the breeding cost is reduced, the method is an optimal scheme from the aspect of environmental protection, no chemical reagent is added, no harmful elements are discharged, and the method is an optimal scheme from the aspect of feasibility, and is the most economic, so that the charging cost in production can be saved by recycling the baking soda; zero discharge of culture waste liquid is the embodiment of environmental protection.
Description
Technical Field
The invention relates to the technical field of spirulina culture, in particular to a method for treating spirulina culture waste liquid by an evaporation method.
Background
The spirulina contains abundant amino acids, contains 8 essential amino acids (including isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine) required by human body, and has abundant and balanced amino acid content and reasonable amino acid composition ratio; the essential amino acid content is high. Danish scientists analyzed that spirulina contains essential amino acids for human body that are very similar to RDA values recommended by FAO and WHO; the essential amino acids for human and animal, especially lysine, threonine, methionine and cystine, are very rich, which most vegetable proteins do not have, so the biological value and nutritive value of spirulina are very high. In addition, spirulina contains various unsaturated fatty acids, small molecular polypeptides, various vitamins and oligosaccharides, and abundant minerals. Therefore, the spirulina is the most balanced food recommended by the food and agriculture organization of the United nations, and is listed as a health product by China in 3 months in 2021. In terms of the biological classification, spirulina is a prokaryote, a filament or a loose or tight coiled coil of the phylum cyanobacteria, class cyanobacteria, order Oscillatoriales, family Oscillatoriaceae, subfamily Spirulina.
It is not always known when humans begin to eat spirulina, but people in the sixteen century have found that a large amount of spirulina is eaten by indians in mexico, and the spirulina which is industrially produced in large quantities is in lakeside in the alkali lake in africa in the middle of the 20 th century, and then is cultivated in large quantities in the united states and japan until 90 years. Although the productivity of spirulina in China in the last 30 years has been greatly improved with the advancement of science and technology, 10kg NaHCO is required for 1kg of spirulina dry powder3The culture proportion of the culture medium causes the culture cost to be still high, the pollution of the environment caused by the treatment of the culture waste liquid is a main problem of the current culture, the culture waste liquid is generally removed according to local conditions in a plurality of spirulina manufacturers in south China and coastal areas, and NaHCO in the waste liquid3The discharge into the environment is firstly a contamination with alkali and secondly a hazard with salt. The method is characterized in that a factory in the northern alkali lakefront discharges culture waste liquid into an alkali lake, and heavy metals in the alkali lake seriously exceed the standard after long-term accumulation.
The research finds that: spirulina does not absorb NaHCO3Only the need for HCO3 -The spirulina also needs nitrogen, phosphorus, potassium and other nutrients in the production processMineral substances are absorbed by the spirulina after the mineral substance nutrient substances are added for a plurality of times, the mineral substance nutrient substances are removed along with the spirulina after a plurality of times of harvesting, but heavy metal flow brought by the mineral substance nutrient substances added into the culture solution is in the waste liquid, and the waste liquid is discharged into an alkaline lake to cause harm.
At present, the method for treating the spirulina waste liquid at home and abroad is an advanced method belonging to the field of filtration, namely reverse osmosis technology. The method for treating the waste liquid of the spirulina has high cost, is difficult to be realized by manufacturers, and has the danger of secondary environmental pollution after treatment, namely NaHCO3Is discharged to the environment and cannot be reused in spirulina production.
Disclosure of Invention
The invention aims to provide a method for treating spirulina culture waste liquid by an evaporation method, which is environment-friendly, realizes zero discharge of the culture waste liquid, reduces culture cost, treats solid waste and recovers baking soda, and solves the problems in the background art.
The technical scheme adopted by the invention is as follows: a method for treating spirulina culture waste liquid by an evaporation method comprises the following treatment steps: (1) putting the cultured waste liquid in the open air or in a ventilated state for water evaporation to obtain a dried substance mixed by mineral substances and biomass; (2) burning the dried substance to remove biomass, wherein the main components in the burnt ash are baking soda and heavy metals; (3) and removing heavy metals from the ash to finally obtain recyclable baking soda.
When the step (1) is specifically carried out, attention needs to be paid to the following matters in the moisture evaporation process for greenhouse cultivation, greenhouse-free cultivation and pipeline cultivation, and for greenhouse cultivation and greenhouse cultivation, the greenhouse is designed into a cultivation facility which can be ventilated or can be opened or closed completely so as to facilitate evaporation treatment; facilities for preventing precipitation are made in the evaporation treatment process of the greenhouse-free cultivation so as to facilitate the evaporation treatment; the treatment of the waste liquid of the pipeline culture spirulina also needs ventilation facilities to facilitate evaporation.
Specifically, in the step (1), the water content of the dried product is less than 10%.
When the step (1) is carried out specifically, the biomass comprises spirulina residues and associated organisms left after the spirulina is filtered and removed, and biological residues and dust brought by wind power in the evaporation process.
Specifically, in the step (2), the dried material is introduced into a combustion chamber of a power plant, heat generated by combustion is used for power generation, and CO generated by combustion2And the spirulina is introduced into a culture pond of the spirulina for cyclic utilization after passing through a flue gas purification system.
And (3) when the step (3) is specifically carried out, putting the ash into a sedimentation tank of a power plant, adding a chelating agent to remove heavy metals, and putting the baking soda obtained after the precipitation is finished into the spirulina culture pond again for recycling.
The invention has the beneficial effects that: the method adopts a physical method to treat the breeding waste liquid, the breeding waste liquid is evaporated in the first step to be converted from a liquid state into a solid state, the treatment capacity of the waste liquid is reduced, the biomass is removed, the sterilization and disinfection effects are realized, the generated heat is used for power generation, and the filtered CO is2Injecting into culture pond for cyclic utilization to provide sufficient CO for photosynthesis of Spirulina2(ii) a Precipitating to remove heavy metals to obtain baking soda, wherein the baking soda can be put into a culture pond for recycling; the method is suitable for waste liquid treatment of spirulina cultivated in a greenhouse, waste liquid treatment of spirulina cultivated in a greenhouse and waste liquid treatment of spirulina cultivated in a pipeline, and the culture ingredient of the spirulina comprises 70% NaHCO3The recycling is about half of the material cost is saved, the cultivation cost is reduced, the scheme is the optimal scheme from the aspect of environmental protection, no chemical reagent is added, no harmful element is discharged, and the scheme is the optimal scheme from the aspect of feasibility, as the scheme is the most economic, and the charging cost in the production can be saved by recycling the baking soda; zero discharge of culture waste liquid is the embodiment of environmental protection.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings, which are only used for illustrating the technical solution of the present invention and are not limited.
Aiming at greenhouse cultivation and greenhouse cultivation, a method for treating spirulina cultivation waste liquid by an evaporation method is provided, and the treatment steps are as follows: (1) in non-production seasons, opening plastic cloth of a greenhouse or a ceiling of the greenhouse, and evaporating water from the cultivated waste liquid in the open air and in a ventilation state to obtain a dried substance mixed by mineral substances and biomass, wherein the water content of the dried substance is 10%; (2) putting the dried matter into a combustion chamber of a power plant to burn and remove biomass, wherein the biomass comprises spirulina residues left after the spirulina is filtered and removed and organisms associated with the spirulina residues and the biological residues and dust brought by wind power in an evaporation process, removing the biomass by a burning method, generating plant ash after the biomass is burnt, wherein the amount of the plant ash is negligible because the biomass is not large, the main components in the burnt ash are baking soda and a small part of heavy metal, the heat generated by burning is used for generating power, and CO generated by burning is used for generating power2The spirulina is introduced into a culture pond of the spirulina for recycling after passing through a flue gas purification system; (3) and putting the ash into a sedimentation tank of a power plant, adding lead and arsenic chelating agents to remove heavy metals, finally obtaining recyclable baking soda, and putting the baking soda obtained after the sedimentation into a culture pond of the spirulina for recycling.
Although the principle of treating the waste liquid of spirulina culture by using the evaporation method is simple, the following research work is made by the inventor as to the basic discovery that the evaporation treatment of the waste liquid of spirulina is the basis of experiments and production tests of the present case for many years.
Evaporation experimental group:
taking the area of the great market called for arid and semiarid areas as an example, under the indoor condition of 18-26 ℃, the temperature needs 22-36 days after the evaporation of all the waste liquid with the average depth of 20cm in the later period of the simulated production is finished, and experimental analysis shows that the main factors influencing the evaporation speed are firstly the temperature, secondly the season, thirdly the shape of an evaporation bearing waste liquid container or the ventilation condition, wherein the evaporation speed is faster when the temperature is higher, the evaporation speed is faster when the season is drier, and the evaporation speed is faster when the ventilation is better.
Evaporation test group:
selecting 3 waste liquid pools with the depth of 20cm at the beginning of 11 months in the end of production according to the conclusion of an experimental group for testing; under the condition that a production greenhouse is not opened or closed, when the average air temperature is reduced to be below-10 ℃, the surface layer of the spirulina culture waste liquid begins to freeze, the freezing thickness of the surface layer of the waste liquid is 6-10cm along with the reduction of the air temperature in winter, and when the temperature is reached in spring, the depth of the waste liquid in the greenhouse is still 6-15cm, namely the water in the closed greenhouse is well maintained. Secondly, under the condition that rainfall and snowfall are not prevented after the production greenhouse is opened, when new production in spring begins, the waste liquid in the greenhouse is not evaporated due to the addition of external moisture caused by the precipitation in winter. And thirdly, under the condition that the production greenhouse is opened and closed, when the spring comes, the waste liquid is almost evaporated in the greenhouse, namely the greenhouse is opened to evaporate the waste liquid, when the rainfall or snowfall occurs, the greenhouse is closed to prevent additional water from entering the waste liquid, when the non-production season is finished, the waste liquid of the spirulina can be evaporated, the solid waste is collected, the baking soda is recycled, and the greenhouse can start new production of the spirulina. The test results show that the key of the evaporation treatment of the spirulina culture waste liquid lies in ventilation or opening, and meanwhile, the prevention measures for externally adding precipitation are achieved.
Although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to one skilled in the art that various changes and modifications can be made, and equivalents can be substituted for elements thereof without departing from the scope of the invention.
Claims (6)
1. A method for treating spirulina culture waste liquid by an evaporation method is characterized by comprising the following treatment steps: (1) putting the cultured waste liquid in the open air or in a ventilated state for water evaporation to obtain a dried substance mixed by mineral substances and biomass; (2) burning the dried substance to remove biomass, wherein the main components in the burnt ash are baking soda and heavy metals; (3) and removing heavy metals from the ash to finally obtain recyclable baking soda.
2. The method for treating the spirulina cultivating waste liquid by the evaporation method as claimed in claim 1, wherein a rain and snow preventing device is arranged in the evaporation process in the step (1) to reduce the influence of external precipitation on the water evaporation treatment.
3. The method for treating the spirulina cultivating waste liquid by the evaporation method according to claim 1, wherein the water content of the dried substance in the step (1) is less than 10%.
4. The method for treating waste liquid of spirulina culture by evaporation as claimed in claim 1, wherein the biomass in step (1) comprises spirulina residues and its associated organisms left after the spirulina is filtered and removed, and biological residues and dust brought by wind force during evaporation.
5. The method for treating the spirulina cultivating waste liquid by the evaporation method as claimed in claim 1, wherein in the step (2), the dried material is put into a combustion chamber of a power plant, the heat generated by combustion is used for power generation, and the CO2 generated by combustion is introduced into the spirulina cultivating pool after passing through a flue gas purification system for recycling.
6. The method for treating waste liquid of spirulina cultivation by evaporation method according to claim 1, wherein in the step (3), ash is put into a sedimentation tank of a power plant, chelating agent is added to remove heavy metals, and baking soda obtained after the completion of sedimentation is put into the spirulina cultivation tank again for recycling.
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| CN202110792657.6A CN113493280A (en) | 2021-07-14 | 2021-07-14 | Method for treating spirulina culture waste liquid by evaporation method |
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| CN202110792657.6A CN113493280A (en) | 2021-07-14 | 2021-07-14 | Method for treating spirulina culture waste liquid by evaporation method |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6156561A (en) * | 1997-09-16 | 2000-12-05 | Spirulina Biological Lab., Ltd. | System and method for culturing algae |
| JP2002346535A (en) * | 2001-05-25 | 2002-12-03 | Electric Power Dev Co Ltd | Method for manufacturing inorganic porous molded product |
| CN1793313A (en) * | 2005-12-01 | 2006-06-28 | 梁建国 | Process and apparatus for supplying environment protection Spirulina ultivating carbon source |
| US20130192130A1 (en) * | 2012-01-30 | 2013-08-01 | Nicholas Eckelberry | Systems and methods for harvesting and dewatering algae |
| US20130280792A1 (en) * | 2010-11-08 | 2013-10-24 | Key Group Holding S.R.O. | Processing equipment for organic waste |
| CN103988768A (en) * | 2014-05-30 | 2014-08-20 | 内蒙古科技大学 | Method for cultivating vegetables in water mode through spiral seaweed cultivation waste water |
| CN105779355A (en) * | 2016-04-15 | 2016-07-20 | 内蒙古乌审召生态产业发展有限公司 | Spirulina cultivation method capable of recycling spirulina cultivation liquid |
| CN106517555A (en) * | 2016-11-21 | 2017-03-22 | 天津科技大学 | High-added-value treating method for waste culture liquid of Dunaliella salina |
| CN206467006U (en) * | 2017-01-24 | 2017-09-05 | 鄂尔多斯市蒙健螺旋藻业有限责任公司 | A kind of continous way arsenic removing apparatus |
| CN209210560U (en) * | 2018-11-19 | 2019-08-06 | 深圳市绿得宝保健食品有限公司 | A kind of algal culture wastewater treatment and recyclable device |
| US20200140289A1 (en) * | 2017-04-07 | 2020-05-07 | Noblegen Inc. | Methods and uses of encapsulated exudates and dried euglena biomass for binding metal |
-
2021
- 2021-07-14 CN CN202110792657.6A patent/CN113493280A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6156561A (en) * | 1997-09-16 | 2000-12-05 | Spirulina Biological Lab., Ltd. | System and method for culturing algae |
| JP2002346535A (en) * | 2001-05-25 | 2002-12-03 | Electric Power Dev Co Ltd | Method for manufacturing inorganic porous molded product |
| CN1793313A (en) * | 2005-12-01 | 2006-06-28 | 梁建国 | Process and apparatus for supplying environment protection Spirulina ultivating carbon source |
| US20130280792A1 (en) * | 2010-11-08 | 2013-10-24 | Key Group Holding S.R.O. | Processing equipment for organic waste |
| US20130192130A1 (en) * | 2012-01-30 | 2013-08-01 | Nicholas Eckelberry | Systems and methods for harvesting and dewatering algae |
| CN103988768A (en) * | 2014-05-30 | 2014-08-20 | 内蒙古科技大学 | Method for cultivating vegetables in water mode through spiral seaweed cultivation waste water |
| CN105779355A (en) * | 2016-04-15 | 2016-07-20 | 内蒙古乌审召生态产业发展有限公司 | Spirulina cultivation method capable of recycling spirulina cultivation liquid |
| CN106517555A (en) * | 2016-11-21 | 2017-03-22 | 天津科技大学 | High-added-value treating method for waste culture liquid of Dunaliella salina |
| CN206467006U (en) * | 2017-01-24 | 2017-09-05 | 鄂尔多斯市蒙健螺旋藻业有限责任公司 | A kind of continous way arsenic removing apparatus |
| US20200140289A1 (en) * | 2017-04-07 | 2020-05-07 | Noblegen Inc. | Methods and uses of encapsulated exudates and dried euglena biomass for binding metal |
| CN209210560U (en) * | 2018-11-19 | 2019-08-06 | 深圳市绿得宝保健食品有限公司 | A kind of algal culture wastewater treatment and recyclable device |
Non-Patent Citations (3)
| Title |
|---|
| 刘凯等: "藻类处理水产养殖废水的研究进展", 《淮海工学院学报(自然科学版)》, vol. 25, no. 01, 15 March 2016 (2016-03-15), pages 74 - 79 * |
| 时君友等: "《可再生能源概述》", 30 June 2017, 电子科技大学出版社, pages: 67 - 68 * |
| 李旭东等: "《废水处理技术及工程应用》", 30 June 2003, 机械工业出版社, pages: 232 * |
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