WO2011057532A1 - Procédé de traitement d'eaux usées à levures et additifs d'alimentation et produits d'alimentation obtenus à partir du procédé - Google Patents

Procédé de traitement d'eaux usées à levures et additifs d'alimentation et produits d'alimentation obtenus à partir du procédé Download PDF

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WO2011057532A1
WO2011057532A1 PCT/CN2010/078120 CN2010078120W WO2011057532A1 WO 2011057532 A1 WO2011057532 A1 WO 2011057532A1 CN 2010078120 W CN2010078120 W CN 2010078120W WO 2011057532 A1 WO2011057532 A1 WO 2011057532A1
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yeast
organic wastewater
concentration organic
concentration
wastewater
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PCT/CN2010/078120
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English (en)
Chinese (zh)
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俞学锋
李知洪
余明华
姚鹃
李天乐
谭斌
朱金林
王浩
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安琪酵母股份有限公司
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Publication of WO2011057532A1 publication Critical patent/WO2011057532A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
    • C05F5/006—Waste from chemical processing of material, e.g. diestillation, roasting, cooking
    • C05F5/008—Waste from biochemical processing of material, e.g. fermentation, breweries
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

Definitions

  • the present invention relates to a method for treating yeast wastewater, and more particularly to a method for treating high concentration organic waste water of yeast, and to a feed additive obtained by the above method and a feed product comprising the same.
  • Yeast is currently the only microorganism in the world with an annual output of more than one million tons. It is widely used in wine, food, Chinese medicine, feed, cosmetics and other fields.
  • the yeast industry has formed an independent industrial system in the world with an annual production of more than 3 million tons. Since 1990, China's yeast industry has grown strongly, with an average annual increase of more than 20%. In 2008, the domestic production of active dry yeast was estimated to have reached 200,000 tons. As an important part of the bioengineering industry, the yeast industry has broad prospects for development.
  • Yeast is a product of the fermentation industry. It has the pollution characteristics common in the fermentation industry. At present, the fermentation industry is the second largest polluting industry after the paper industry. As one of the products in the fermentation industry, yeast also has the fermentation industry. The pollution characteristics, that is, the large amount of water consumption and the high concentration of wastewater pollutants, the treatment of wastewater is recognized as a major problem in the environmental protection water treatment industry.
  • the yeast wastewater contains high concentrations of organic matter, so the biological treatment system is used as the main treatment method at home and abroad, plus pretreatment such as regulation and acidification, and chemical coagulation, air flotation, sand filtration and other post-treatment processes, except for An Qi. Outside of Yeast Co., Ltd., the world's yeast wastewater treatment has reached China's GB8978-96 "Comprehensive Standard for Wastewater Pollutant Emissions", and there are basically no manufacturers.
  • the emission indicators of yeast wastewater treatment vary widely from country to country. The difficulty of handling has seriously affected the development of the yeast industry in China.
  • yeast fermentation wastewater is rich in organic matter and various inorganic elements, it is very difficult to reach the standard of wastewater treatment directly. If the resource utilization and comprehensive utilization are taken, it is an important part of the recycling economy in the sugar industry chain. Therefore, research on the comprehensive utilization and recycling of wastewater from yeast wastewater and related industries has continued in recent years.
  • yeast production companies in the United States mix yeast wastewater with treated urban wastewater in a certain proportion.
  • the agricultural irrigation method has less investment, and the operation is simple, and it can be used in many farmland and water shortage areas.
  • agricultural irrigation is limited by the amount of application, type of land, capacity to absorb, radius of application, etc., such as blind application, burning plants, destroying soil, and contaminating groundwater (Gladchenko et al., Combined biological and physico-chemical treatment of baker's yeast wastewater including removal Of coloured and recalcitrant to biodegradation pollutants. Water Science Technology, 2004, 50(5): 67-72). Therefore, its application is limited, especially for large-scale yeast plants with large amounts of wastewater.
  • CN 1125058 A discloses a method for producing a solid protein feed by using a sugar-containing fermentation waste liquid, which comprises evaporating and concentrating a sugar-containing fermentation waste liquid, adding a high-temperature digestion of an acid, adding a carbonate to a neutralization, and then adding a plant, a plant fruit.
  • the dry powder of the shell and the mixture are mixed, pulped, dried and pulverized to obtain a finished product.
  • CN 1454873A discloses a process for producing refined organic fertilizer by using ultra-high concentration organic wastewater, which comprises treating ultra-high concentration organic wastewater by one or more stages of concentration process, and after 60BX-80BX hammering, entering refined organic fertilizer.
  • Production equipment made of granular or powdered organic fertilizer.
  • CN 1509987 A discloses a method for producing a potassium chemical product such as a potassium salt from a molasses alcohol waste liquid, which comprises adding a potassium removal agent to the molasses alcohol waste liquid after removing the insoluble organic matter, crystallizing the potassium salt, and removing the potassium molasses alcohol.
  • the waste liquid can be directly concentrated to make animal feed additives.
  • Rope Xin'an et al reported that the high-concentration organic wastewater produced by fermentation was concentrated by a multi-effect evaporator, and the concentrated slurry was produced by a spray granulation dryer to produce an organic compound fertilizer (Xin Xin'an, etc., using a spray granulation dryer to treat high fermentation) Concentration of Organic Wastewater, Chemical Design Communications, 2004, 30(3), 44-45 and 49).
  • Chen Peijin et al. disclosed a process for recycling yeast wastewater, including recycling centrifugally separated wastewater for yeast cell culture (Chen Peijin et al., Research on Yeast Wastewater Recycling, Environmental Pollution and Control, 1993, 15(5), 12- 14 and 20, 48), but this method has problems such as accumulation of inhibitors and contamination of bacteria, so there are still some problems in its promotion and use.
  • Gao Yishao et al. disclose a process for treating wastewater of high concentration organic matter in different stages of yeast production by UF or NF technology.
  • the yeast protein and other components recovered by membrane concentration can be used as animal feed additives by further concentration and drying, and other ingredients can be reused. Fermentation production (highly fired, etc., UF, NF treatment of yeast wastewater feasibility study, water treatment technology, 1997, 23(1), 12-18).
  • the present invention provides a yeast high-concentration organic wastewater treatment method, and a feed additive obtained by the above method and a feed product comprising the feed additive.
  • the yeast high-concentration organic wastewater treatment method of the invention can treat the high-concentration organic wastewater of yeast to be utilized as fertilizer and feed additive at the same time, which not only improves the economic benefit of the yeast wastewater, but also greatly reduces the cost of the yeast wastewater treatment, thereby The best comprehensive utilization of resources is achieved; in addition, the potassium content of the fertilizer can be increased to obtain a high-grade potassium salt fertilizer.
  • an object of the present invention is to provide a method for treating a high concentration organic wastewater of yeast, comprising the steps of:
  • step 3 Drying and granulating the salt removed in step 2) to obtain a finished fertilizer; and drying the yeast high-concentration organic wastewater concentrate after the desalting step 2 to obtain a feed additive.
  • the calcium ion concentration in the yeast high concentration organic wastewater concentrate obtained in the control step 1) is not more than about 0.5% (w/w), such as not more than 0.5% (w/w).
  • the concentration of the yeast high concentration organic wastewater concentrate obtained in step 1) is controlled to be between about 40-80% (w/w), such as between 40-80% (w/w). Preferably between about 45-70% (w/w), such as between 45-70% (w/w); more preferably between about 50-65% (w/w), such as 50-65% (w) Between /w); most preferably between about 55-60% (w/w), such as between 55-60% (w/w).
  • the temperature of the yeast high concentration organic wastewater concentrate obtained in step 1) is controlled to be between about 20-90 ° C, such as between 20-90 ° C; preferably about 40-75 ° C. Between, for example, between 40-75 ° C; more preferably between about 45-70 ° C, such as between 45-70 ° C; most preferably between about 50-65 ° C, such as 50-65 ° C between.
  • the high concentration organic wastewater in step 1) is concentrated by evaporation.
  • a sulfate catalyst is added during the process, preferably sodium sulfate, ammonium sulfate and/or magnesium sulfate, more preferably ammonium sulfate.
  • the catalyst is added at a concentration of about
  • the pH of the high concentration organic wastewater is controlled to be between about 3.0 and 7.0, such as between 3.0 and 7.0; preferably about 3.5. Between -6.5, such as between 3.5 and 6.5; more preferably between about 4.0 and 6.0, such as between 4.0 and 6.0; most preferably between about 4.5 and 5.5, such as between 4.5 and 5.5.
  • the yeast high-concentration organic wastewater concentrate obtained in the step 1) is desalted by centrifugation.
  • the main raw material for the yeast industry is the waste molasses produced by the sugar factory, including sugar cane molasses and beet molasses. At present, the utilization rate of two raw materials in China is basically 50%. After the molasses is treated, it is fermented to produce yeast, which is separated, washed and dried to obtain a yeast product. The production process and wastewater generation points are shown in Figure 1.
  • the yeast is an industrially useful yeast including, but not limited to, yeast of the genus Saccharomyces, Candida, and Rhodotomla, such as Saccharomyces cerevisiae.
  • yeast wastewater refers to waste water produced in the process of producing yeast from waste molasses as a main raw material, containing higher substances such as melanin, phenols and caramel, and the color is relatively high. Deep, brownish-black; yeast wastewater contains about 0.5% dry matter, the main components are yeast protein, cellulose, colloidal substances and nutrients such as residual sugar in the underutilized waste molasses, indicators of fully mixed wastewater See Table 1 below for details.
  • Table 1 Indicators of total mixed wastewater from yeast production (unit: mg/L, except P H and color) Refers to COD B0D 5 H SS ⁇ total phosphorus color so 4 2 — mark (by (times)
  • Yeast wastewater is also classified into high-concentration wastewater (also referred to as high-concentration organic wastewater) and low-concentration wastewater.
  • high-concentration wastewater also referred to as high-concentration organic wastewater
  • low-concentration wastewater When used in the present invention, the terms “high-concentration wastewater”, “high-concentration organic wastewater”, and “yeast high-concentration organic wastewater” “and “yeast high-concentration organic wastewater” are used interchangeably and refer to the centrifugal separation in the yeast production process and the wastewater discharged from the filtration device, which can have a COD of up to 80,000 mg/L or more; when used in the present invention, the term “Low-concentration wastewater” and “yeast low-concentration wastewater” are used interchangeably, and refer to the wastewater discharged from the yeast production process as well as domestic wastewater, with an average COD of about 1500 mg/L.
  • the term "evaporation concentration” refers to a process in which a portion of the vaporized solvent is removed after heating the solution to increase the concentration of the solution, i.e., the solution is concentrated.
  • the evaporative concentration system used in the method of the present invention includes, but is not limited to, a single effect evaporator, a two effect evaporator, and a multi-effect evaporator, wherein the multi-effect evaporator may be a three-effect, four-effect, five-effect or six-effect evaporator. It is preferred to use a multi-effect evaporator, more preferably a six-effect evaporator.
  • yeast high-concentration organic wastewater concentrate When used in the present invention, the terms "yeast high-concentration organic wastewater concentrate”, “yeast wastewater concentrate” and “wastewater concentrate” are used interchangeably, and refer to a concentrate obtained by evaporating and concentrating yeast high-concentration organic wastewater. . Desalting
  • the ash in the high concentration organic wastewater concentrate of yeast is high, and such ash is mainly derived from inorganic salts, if it is directly used in the feed, it will bring certain damage to the animal, so it is necessary to have a high concentration of yeast.
  • the organic wastewater concentrate is pretreated to remove part of the salt in the wastewater, so that the ash content in the concentrate is reduced, so that the desalted yeast high concentration organic wastewater concentrate can be used as an additive in the feed.
  • a plurality of methods can be used for desalting the yeast high-concentration organic wastewater concentrate, including but not limited to centrifugal desalination, membrane treatment desalting, and resin treatment desalination.
  • the salt is crystallized in the yeast high-concentration organic wastewater concentrate, it is preferably desalted by centrifugal separation, for example, using a multi-chamber centrifuge, a disc centrifuge, a sedimentation screw discharge centrifuge for centrifugal desalination, optimization
  • the desalination is carried out by centrifugation using a sedimentation type screw discharge centrifuge, and it is more preferable to carry out centrifugal desalination using a horizontal screw discharge sedimentation centrifuge (also referred to as a decanter centrifuge).
  • inorganic salts formed by the combination of K, Ca, Na ions and sulfate ions, namely potassium sulfate K 2 S0 4 , potassium gypsum K 2 Ca(SO) 2 .H 2 0, potassium mirabilite NaS0 4 - ( K&Na) 3 S0 4 , and there are two molecular compositions of potassium mirabilite, respectively K 3 Na(S0 4 ) 2 , the former substance has a K 2 0 content of 35%, and the latter substance has a ⁇ 20 content of 13%.
  • reaction formula is a sequential process for the formation of three inorganic salts.
  • K 2 S0 4 was isolated to obtain a high content of potassium salt, and the order of formation of the three inorganic salts was potassium gypsum, potassium sulfate, and potassium mirabilite. Therefore, in order to further obtain a high-grade potassium salt, it is necessary to reduce the concentration of Ca ions in the yeast wastewater as much as possible.
  • the calcium in the yeast wastewater is mainly derived from the molasses itself and the calcium salt added in the fermentation process. In general, the concentration of calcium in the molasses itself is generally not more than 0.5% (w/w). In order to ensure the high-grade potassium salt, the amount of calcium added in the yeast fermentation process is required to make the yeast high-concentration organic wastewater. The concentration of calcium ions in the medium does not exceed about 0.5% (w/w catalyst
  • the addition of catalyst is particularly important, and the catalyst used in the method of the present invention is sulfate, including but not limited to Sodium sulfate, ammonium sulphate and/or magnesium sulphate, preferably ammonium sulphate.
  • the concentration of the catalyst added is generally controlled to be about 20-60% (w/w), such as 20-60% (w/w); preferably about 30-50% (w/w), such as 30-50% (w/w). More preferably, it is about 35-45% (w/w), such as 35-45% (w/w); most preferably about 40% (w/w), such as 40% (w/w); Adding a catalyst to the evaporation concentration process of high-concentration organic wastewater, for example, when using a multi-effect evaporator for evaporative concentration of yeast high-concentration organic wastewater, it can be used between any two-effect heaters (such as when using a six-effect evaporator) The catalyst may be added, for example, between a three-effect and four-effect heater.
  • the number of additions of the catalyst during the evaporation concentration is one. Because of the above-mentioned catalyst, K 2 S0 4 crystals are gradually formed during the stepwise evaporation and concentration of yeast high-concentration organic wastewater, and KC1 crystals are easily formed in the wastewater concentrate due to the presence of chloride ions, due to the solubility of KC1. High, above 50 °C, KC1 is in a dissolved state, if the temperature is lowered to 20 °C, KC1 will precipitate. Therefore, when extracting potassium sulfate, care should be taken to control the temperature, thereby suppressing the crystallization process of KC1. H control
  • the concentration of the yeast high-concentration organic wastewater concentrate and the control of the feed temperature are important, and the general yeast concentration is high.
  • the concentration of the organic wastewater concentrate is controlled between about 40-80% (w/w), Between about 45-70% (w/w), more preferably between about 50-65% (w/w), most preferably between about 55-60% (w/w), and the temperature is controlled at about 20 Between -90 ° C, preferably between about 40-75 ° C, more preferably about 45-70. Between C, most preferably between about 50-65 ° C, such that more K 2 S0 4 crystals and KC1 crystals can be formed during the separation process.
  • the salt extracted from the yeast high-concentration organic wastewater concentrate may be subjected to dry granulation to prepare a finished fertilizer, and the dry granulation method used in the method of the present invention includes, but is not limited to, drum drying granulation, spray drying granulation, shot blasting Dry granulation and boiling dry granulation, preferably drum drying granulation.
  • the desalted yeast high-concentration organic wastewater concentrate is dried to obtain a feed additive, and the drying method used in the method of the present invention includes, but is not limited to, a direct drying method, an indirect drying method, and a dielectric heating drying method, and a direct drying method is preferred.
  • the direct drying method includes, but is not limited to, surface drying, air flow drying, spray drying, vibration drying, and boiling granulation drying, with spray drying being preferred.
  • the yeast high-concentration organic wastewater treatment method of the present invention can treat the high-concentration organic wastewater of yeast to be utilized as a fertilizer and a feed additive at the same time, thereby not only improving the economic benefit of the yeast wastewater, but also greatly The cost of yeast wastewater treatment is reduced, thereby achieving the optimal comprehensive utilization of resources; in addition, high-grade potassium salt fertilizer can be obtained by further controlling the process parameters in the evaporation concentration and desalination process.
  • the yeast high-concentration organic wastewater concentrate is used as a feed additive after desalting treatment, and is rich in yeast cell fermentation metabolites, various trace elements and certain amino acid proteins, and can be used for ruminant, fish, poultry and the like.
  • the additive has good stability and can be used in the processing of feed products, and has a good effect on improving the quality of the feed.
  • the yeast high-concentration organic wastewater concentrate is rich in potassium, sodium, chlorine, calcium, phosphorus, magnesium, etc., as a source of calcium, phosphorus and trace elements in the animal body.
  • Potassium, sodium, chlorine, etc. can ensure the acid-base balance of the animal body. Ion balance, maintain the rumen environment stability of ruminants, calcium, phosphorus, magnesium are essential mineral elements for animal growth and development, maintaining normal function.
  • yeast fermentation uses beet molasses as the main raw material In the production, the feed additive product obtained by the preparation contains more than 10% of betaine.
  • Betaine has been widely used in animal, poultry, and aquaculture nutrient additives, partially replacing methionine or choline chloride, aquatic products, and synergistic with anticoccidial drugs, which can improve immunity and improve meat quality.
  • Figure 1 shows the yeast production process and wastewater generation points.
  • FIG. 2 shows an illustrative process flow for the treatment of high concentration organic wastewater from yeast.
  • Example 1 Yeast high concentration organic wastewater treatment process
  • the yeast high-concentration organic wastewater treatment is carried out according to the illustrative yeast high-concentration organic wastewater treatment process shown in FIG.
  • the beet molasses is used as a raw material to ferment the Saccharomyces cerevisiae, and the high-concentration organic wastewater produced by the yeast in the fermentation separation process is added to the six-effect falling film evaporator (manufacturer: Yixing Grant), and the high-concentration organic wastewater is distributed through the distribution device.
  • the hook is distributed in the various heaters of the evaporator. Under the action of gravity and vacuum induction and airflow, the material flows from top to bottom in the form of film. During the movement, it exchanges heat with the heating steam on the outer wall of the heater to evaporate, and then in the separation chamber.
  • the gas and liquid are separated, the upper layer removes the steam to obtain the condensed water, and the lower layer draws the liquid to obtain the yeast high concentration organic wastewater concentrate; the catalyst ammonium sulfate is added between the first effect and the second effect evaporator, and the catalyst is added at a concentration of 40 %(w/w);
  • the pH of the yeast high-concentration organic wastewater concentrate is controlled to be 5.0 by adding concentrated sulfuric acid; by adjusting the operating parameters of the above-mentioned evaporator, the temperature of the yeast high-concentration organic wastewater concentrate is controlled at 60 ° C, Concentration control
  • the salt which is taken out is added to the drum drying granulator, and the drum drying granulator is direct heating type, and the diameter is 1.8.
  • the desalted yeast high-concentration organic wastewater concentrate is added to the spray drying device, and the concentrate is sent to the high-speed centrifugal atomizer through a feed pump, and the atomizer atomizes the liquid into fine droplets in the tower.
  • the natural air is heated to a set high temperature by a direct-fired coal-fired hot blast stove, and flows through the volute hot air distributor to uniformly enter the tower.
  • the fine droplets are in contact with hot, hot air, drying instantaneously, and drying the residual water during the falling process.
  • the product is discharged from the lower part of the drying tower into the centralized collection air delivery system.
  • a small amount of fine powder and tail gas are separated by a cyclone separator.
  • a buffer is arranged at the lower part of the cyclone separator.
  • the dry powder enters the centralized collection through the buffer and the rotary discharge valve. Material air delivery system.
  • the exhaust gas separated and separated by the cyclone separator enters the water film dust collector through the induced draft fan, and a small amount of dry powder is trapped. When a certain concentration is reached, it can be returned to the front to evaporate.
  • the exhaust gas discharged into the atmosphere after passing through the water film dust collector is cleanly discharged.
  • the dry powder entering the dehumidification air delivery system is separated by the small cyclone separator and then placed in the silo and packaged to achieve the purpose of cooling the material to prevent moisture absorption and agglomeration.
  • the small cyclone separator exhaust gas enters the large cyclone separator. In the middle, catching again reduces waste. In this way, a feed additive is obtained.
  • Drying tower diameter of drying chamber ⁇ 9000 ⁇ , straight barrel height 9000mm
  • Air volume for drying 52228kg/h (average temperature of natural air 15 °C average humidity 70%)
  • Heating method 8 million kcal direct-fired coal-fired hot blast stove (two sets share one)
  • Auxiliary equipment air hammer device; lighting device; dehumidifying air cooling air delivery system; wet dust removal Exhaust gas treatment; waste heat utilization
  • Receiving method The bottom of the tower and the cyclone separator are discharged from the dehumidifying wind at two points, and the wind is sent to the small cyclone.
  • the obtained feed additive and the high concentration organic wastewater of the yeast before treatment are compared as shown in Table 2; the COD index of the sewage condensed water is reduced from about 5000 mg/l before treatment to about 1000 mg after treatment. /1;
  • the indicators of the prepared product fertilizer are shown in Table 3 below.
  • Example 2 Another yeast high-concentration organic wastewater treatment process
  • the yeast high-concentration organic wastewater treatment is carried out according to the illustrative yeast high-concentration organic wastewater treatment process shown in FIG.
  • the beet molasses is used as a raw material to ferment the Saccharomyces cerevisiae, and the high-concentration organic wastewater produced by the yeast in the fermentation separation process is added to a six-effect falling film evaporator (manufacturer: Yixing Grant).
  • the high-concentration organic wastewater is distributed into the heater of the evaporator through the distribution device. Under the action of gravity and vacuum induction and airflow, the material flows in a film form from top to bottom, and heat exchange with the heating steam on the outer wall of the heater during the movement.
  • the upper layer draws off the steam to obtain condensed water
  • the lower layer draws off the liquid to obtain the yeast high-concentration organic wastewater concentrate
  • the catalyst ammonium sulfate is added between the three-effect and four-effect evaporators.
  • the catalyst is added at a concentration of 35% (w/w);
  • the pH of the yeast high-concentration organic wastewater concentrate is controlled to be 4.5 by adding concentrated sulfuric acid;
  • the yeast high-concentration organic wastewater concentrate is adjusted by adjusting the operating parameters of the above evaporator
  • the temperature is controlled at 65 ° C and the concentration is controlled at 50% (w/w) o
  • the extracted salt is added to a drum drying granulator, and the drum drying granulator is a direct heating type with a diameter of 1.8 m and a length of 20 m to prepare a finished fertilizer.
  • the desalted yeast high-concentration organic wastewater concentrate is added to the spray drying device, and the concentrate is sent to the high-speed centrifugal atomizer through a feed pump, and the atomizer atomizes the liquid into fine droplets in the tower.
  • the natural air is heated to a set high temperature by a direct-fired coal-fired hot blast stove, and flows through the volute hot air distributor to uniformly enter the tower.
  • the fine droplets are in contact with hot, hot air, drying instantaneously, and drying the residual water during the falling process.
  • the product is discharged from the lower part of the drying tower into the centralized collection air delivery system.
  • a small amount of fine powder and tail gas are separated by a cyclone separator.
  • a buffer is arranged at the lower part of the cyclone separator.
  • the dry powder enters the centralized collection through the buffer and the rotary discharge valve. Material air delivery system.
  • the exhaust gas separated and separated by the cyclone separator enters the water film dust collector through the induced draft fan, and a small amount of dry powder is trapped. When a certain concentration is reached, it can be returned to the front to evaporate.
  • the exhaust gas discharged into the atmosphere after passing through the water film dust collector is cleanly discharged.
  • the dry powder entering the dehumidification air delivery system is separated by the small cyclone separator and then placed in the silo and packaged to achieve the purpose of cooling the material to prevent moisture absorption and agglomeration.
  • the small cyclone separator exhaust gas enters the large cyclone separator. In the middle, catching again reduces waste. In this way, a feed additive is obtained.
  • Drying tower diameter of drying chamber ⁇ 9000mm, straight barrel height 9000mm
  • Air volume for drying 52228kg/h (average temperature of natural air 15°C average humidity 70%)
  • Heating method 8 million kcal direct-fired coal-fired hot blast stove (two sets share one)
  • Auxiliary equipment air hammer device; lighting device; dehumidifying air cooling air delivery system; wet dust collector exhaust gas treatment; waste heat utilization
  • Receiving method The bottom of the tower and the cyclone separator are discharged from the dehumidifying wind at two points, and the wind is sent to the small cyclone.
  • Example 3 Preparation of feed containing feed additive prepared from yeast high concentration organic wastewater concentrate
  • the feed additive obtained in Example 1 or 2 is directly added to the corresponding full-price compound feed product according to the amount of the additive described in Table 5 below, for example, adding 1.5% (w/w) of the feed additive to the poultry compound feed, and then adopting Mix the feed mixer for 10 minutes to ensure that the product is evenly mixed in the feed.
  • Mixed products can feed poultry animals directly.
  • the test results showed that: 1) 0.5 ⁇ 2% (w/w) of the above feed additive was added to the broiler basal diet, the broiler spirit was normal, and the death rate was not increased compared with the control group, and l% was added (w/w) The average daily gain of the above feed additive was increased by 3% relative to the control group. It has a good growth promoting effect; 2) adding 1% (w/w) and 2% (w/w) of the above feed additives to the basal diet, the broiler drinking water increases, and the growth is rapid; 3) the yeast wastewater feed protein can Replace some protein materials to reduce feed costs.

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  • Fodder In General (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

L'invention porte sur un procédé de traitement d'eaux usées à levures organiques à haute concentration et sur des additifs d'alimentation et sur des produits d'alimentation obtenus à partir du procédé. Le procédé comprend les étapes d'évaporation, de désalinisation et de séchage. Dans le procédé, les eaux usées (1) sont changées en engrais (8) et en additifs d'alimentation (11) destinés à être utilisés par le traitement, ce qui non seulement améliore les avantages économiques des eaux usées à levures, mais ce qui réduit également considérablement le coût du traitement d'eaux usées à levures. De plus, cela peut également accroître le potassium dans l'engrais, de façon à obtenir une potasse de haute qualité.
PCT/CN2010/078120 2009-11-12 2010-10-26 Procédé de traitement d'eaux usées à levures et additifs d'alimentation et produits d'alimentation obtenus à partir du procédé WO2011057532A1 (fr)

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CN200910212384.2 2009-11-12

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CN103100235B (zh) * 2011-11-15 2015-03-18 安琪酵母股份有限公司 一种喷雾干燥塔及利用酵母发酵废液生产有机肥料的方法
CN103183437A (zh) * 2011-12-27 2013-07-03 安琪酵母股份有限公司 一种酵母废水再利用的方法及用该方法生产酵母的方法
CN102515445A (zh) * 2011-12-30 2012-06-27 安琪酵母股份有限公司 一种高浓度酵母废水的处理系统及方法
CN103848651B (zh) * 2012-11-30 2016-03-30 北京农学院 一种粘红酵母生物肥料的制备方法及应用
CN105815574A (zh) * 2016-03-02 2016-08-03 湖北海宜生物科技有限公司 一种利用复合菌种对酵母生产废水和菜粕混合固体发酵生产生物蛋白饲料的方法
CN106578352A (zh) * 2016-12-12 2017-04-26 安徽翠鸟生物技术有限公司 废酵母制备饲用干酵母的方法和干酵母
CN107006686A (zh) * 2017-04-27 2017-08-04 新希望六和股份有限公司 一种具有粘合作用的食品酵母粉的制备方法及应用
CN108794104A (zh) * 2017-04-28 2018-11-13 唐健发 一种钾污水的生态利用方法
CN107683961A (zh) * 2017-08-18 2018-02-13 吉林农业大学 一种利用酵母废液生产饲料防霉保水促长剂
CN108675530B (zh) * 2018-05-11 2021-04-13 武汉美味源生物工程有限公司 一种酵母废盐水回收处理方法及由该方法获得的饲料添加剂

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