CN102942236A - Method for treating and reusing waste fluid from citric acid chromatography extraction - Google Patents
Method for treating and reusing waste fluid from citric acid chromatography extraction Download PDFInfo
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- CN102942236A CN102942236A CN2012103817496A CN201210381749A CN102942236A CN 102942236 A CN102942236 A CN 102942236A CN 2012103817496 A CN2012103817496 A CN 2012103817496A CN 201210381749 A CN201210381749 A CN 201210381749A CN 102942236 A CN102942236 A CN 102942236A
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Abstract
The invention discloses a method for treating and reusing waste fluid from citric acid chromatography extraction. The treatment method is as follows: a composite adsorbent comprising attapulgite, acid modified attapulgite, zeolite powder, bentonite, sodium ion modified zeolite powder and organically modified zeolite powder is used as an adsorption medium to conduct adsorption treatment on the waste fluid; and a first adsorption and a second adsorption are included. The reuse method is as follows: a second adsorption clear liquid from the second adsorption is directly used in a raw material pulping process in a citric acid fermentation production method, and is processed into a raw material slurry; and addition amount of the second adsorption clear liquid is subject to that the concentration of the raw material in the raw material slurry for citric acid fermentation production reaches 200-320 g / L. The invention provides an efficient, low-cost and recyclable method for treating and reusing waste fluid from citric acid chromatography extraction, and accomplishes the purposes of preventing pollution and increasing economic efficiency.
Description
Technical field
The invention belongs to Industrial Wastewater Treatment recovery technology field, be specifically related to processing and the recycling method of citric acid chromatogram waste liquid that extraction method produces.
Background technology
Traditional method for extracting citric acid is mainly calcium salt precipitation method, adopts this extraction process to produce citric acid and can produce a large amount of trade effluents and waste residue, the havoc ecotope.In recent years, the cleaner production that occurs in long-term industrial pollution control process has been turned out to be environmental friendliness by the practice of many countries in the world and has been conducive to the effective means of Sustainable development.
Citric acid chromatogram extraction method is as a kind of clean production method, low with its sulfuric acid consumption, produce waste gas few, do not produce the advantage such as calcium sulfate waste residues, more and more be subject to the favor of citric acid manufacturing.Yet, in the production process of chromatography extraction citric acid, can produce a large amount of waste liquids, contain citric acid, protein, glucose and other carbohydrate, fat, ammonia nitrogen, organic acid, fermentation thalline Secretases, fermentation residue etc. in the waste liquid, its organic concentration height, complicated component, acid strong, intractability is large.
At present, domestic citric acid chromatogram extraction method waste liquid mainly carries out traditional decontaminated water to be processed, and comprises biological treatment, such as anaerobic biological process, activated sludge process, biomembrance process etc.Although the method treatment effect is better, investment is large, and cost is high, and final treatment solution can not reclaim and cycling and reutilization; In addition, the treatment process of reported citric acid chromatogram extraction method waste liquid also has Photosynthetic Bacteria, emulsion liquid membrane etc., but all low owing to processing efficiency, cost is high, operating procedure is loaded down with trivial details and can't large-scale promotion application.
Therefore, develop the treatment process of a kind of high-level efficiency, low cost, citric acid chromatogram extraction method waste liquid capable of circulation, in the hope of reaching dual purpose pre-anti-pollution and that increase economic efficiency, have very important meaning.
Summary of the invention
Defects for the treatment process existence that has citric acid chromatogram extraction method waste liquid now, the applicant is through Improvement, processing and the recycling method of a kind of high-level efficiency, low cost, citric acid industry chromatogram waste liquid capable of circulation are provided, have reached the pre-anti-pollution and dual purpose of increasing economic efficiency.
Technical scheme of the present invention is as follows:
A kind for the treatment of process of citric acid chromatogram extraction method waste liquid may further comprise the steps:
(1) one-level absorption: in described waste liquid, add the compound adsorbent that, zeolite powder attapulgite modified by attapulgite, acid, wilkinite, sodium ion modified zeolite powder and organic modified zeolite powder form, in 60～65 ℃ of whip attachment 0.5～2.5h, mixing speed is 50～180rpm, last standing sedimentation 0.5～10h, sedimentation is complete, the supernatant liquor that obtains is one-level absorption clear liquid, wherein:
The mass concentration of attapulgite is 30～100g/L,
The attapulgite modified mass concentration of acid is 10～50g/L,
The mass concentration of zeolite powder is 30～100g/L,
Bentonitic mass concentration is 10～50g/L,
The mass concentration of sodium ion modified zeolite powder is 5～20g/L,
The mass concentration of organic modified zeolite powder is 5～20g/L;
(2) secondary absorption: in step (1) gained one-level absorption clear liquid, again add above-mentioned compound adsorbent, again carrying out whip attachment and sedimentation according to the described method of step (1) processes, the supernatant liquor that obtains is the secondary absorption clear liquid, is the final treatment solution of described waste liquid.
Its further technical scheme is:
The described compound adsorbent recycling of step (1) and step (2) 2～5 times.
The present invention also provides a kind of recycling method of citric acid chromatogram extraction method waste liquid, gained secondary absorption clear liquid is directly used in raw slurry modulating process in the fermentative Production citric acid, its raw material with the fermentative Production citric acid is mixed and stir, make raw slurry.
Its further technical scheme is:
The raw material of described fermentative Production citric acid is selected from a kind of in Semen Maydis powder, Tapioca Starch, wheat starch, the sweet potato powder.
The add-on of described secondary absorption clear liquid reaches 200～320 g/L with the mass concentration of raw material in described raw slurry of described fermentative Production citric acid and is as the criterion.
The present invention has following useful technique effect:
The present invention is directed to the waste liquid that citric acid chromatogram extraction method produces, with attapulgite, attapulgite modified, the zeolite powder of acid, wilkinite, sodium ion modified zeolite powder and organic modified zeolite powder by a certain percentage proportioning make compound adsorbent, and directly feed intake as adsorption medium and in above-mentioned waste liquid, to carry out adsorption treatment; Attapulgite, zeolite powder, wilkinite are the silicate non-metallic mineralss of a class frame columnar structure, its basic structure is to connect the special pore canal system that forms by oxo bridge by many silicon-oxy tetrahedrons, has superior adsorption bleaching ability, wherein, attapulgite and the attapulgite modified main Adsorption organic acid of acid, zeolite powder, sodium ion modification and organic modified zeolite powder and wilkinite mainly adsorb ammonia nitrogen and protein, and the three all has certain adsorption to carbohydrate.On the one hand, the above-mentioned sorbent material of compound use can effectively be removed sugar in the above-mentioned waste liquid, organic acid, ammonia nitrogen etc., after testing, treatment process of the present invention can reach respectively 95%, 28%, 42% to the clearance of organic acid, total reducing sugar, total nitrogen, with process before compare, the absorption clear liquid transmittance after the processing significantly increases, acidity descends, and the method operating procedure is simple, investment is little, efficient is high, sorbent material can reuse, and is conducive to save energy, reduces cost of water treatment; On the other hand, in the absorption clear liquid that the inventive method is processed, also contain an amount of total reducing sugar and total nitrogen, can be used as the Carbon and nitrogen sources that mould in the Citric Acid Fermentation (such as black-koji mould) mycelial growth is used, thereby be applied to raw material in the fermentative Production citric acid industry operation of sizing mixing, the recovery and reuse of citric acid industry chromatogram waste liquid have been realized, save water resources, greatly reduced production cost.In sum, the invention provides processing and the recycling method of a kind of high-level efficiency, low cost, citric acid chromatogram extraction method waste liquid capable of circulation, reached the pre-anti-pollution and dual purpose of increasing economic efficiency.
Description of drawings
Fig. 1 is the synoptic diagram of the treatment facility of waste liquid described in the present invention.
Fig. 2 is the processing synoptic diagram that the chromatogram extraction method is produced chromatogram waste liquid in the process of citric acid and the prior art.
Fig. 3 is that the chromatogram extraction method is produced the process of citric acid and processing and the recycling synoptic diagram of chromatogram waste liquid of the present invention.
Embodiment
Below in conjunction with accompanying drawing, and by embodiment the present invention is specifically described.
As shown in Figure 1, enter waste liquid dashpot 1 from the pending chromatogram waste liquid in citric acid production workshop,
After therein short stay and the buffering, pass in the one-level adsorption tank 2 that agitator 7 is housed, under the condition that constantly stirs, carry out absorption reaction with the compound adsorbent that adds in the one-level adsorption tank 2; Absorption finishes, and carries out standing sedimentation in the first grade subsides groove 3 with passing into through the suspension of the chromatogram waste liquid of absorption reaction and compound adsorbent in the one-level adsorption tank 2; Sedimentation finishes, and the absorption of the one-level in the first grade subsides groove 3 clear liquid is passed in the secondary absorption groove 4 that agitator 7 is housed, and carries out absorption reaction with the compound adsorbent that adds in the secondary absorption groove 4 under the condition that constantly stirs; Absorption finishes, and carries out standing sedimentation in the secondary subsider 5 with passing into through the suspension of the one-level absorption clear liquid of absorption reaction and compound adsorbent in the secondary absorption groove 4; Sedimentation finishes, and the secondary absorption clear liquid in the secondary subsider 5 is passed in the absorption clear liquid groove 6 preserve, and obtains the final treatment solution of described waste liquid.Gained secondary absorption clear liquid is directly used in raw slurry modulating process in the fermentative Production citric acid, simultaneously, the secondary absorption agent mud of sedimentation in the secondary subsider 5 passed in the one-level adsorption tank 2 recycles.The mobile of liquid is to realize in the mode that pump aspirates in the above-mentioned waste liquor treatment equipment.
Such as Fig. 2 and shown in Figure 3, the chromatogram waste liquid that citric acid chromatogram extraction method produces in the prior art directly carries out traditional decontaminated water and processes (such as anaerobic biological process, activated sludge process, biomembrance process, Photosynthetic Bacteria etc.), and the waste liquid after the processing can not recovery and reuse; The present invention utilizes compound adsorbent that citric acid chromatography extraction waste liquid is carried out adsorption treatment, waste liquid after the processing can be directly used in raw material in the fermentative Production citric acid operation of sizing mixing, realize the reuse of citric acid industry chromatogram waste liquid, saved water resources, reduced production cost.
Embodiment 1
The treatment process of citric acid industry chromatogram waste liquid:
(1) pre-treatment: the pending waste liquid from citric acid chromatography production plant enters waste liquid dashpot 1, after therein short stay and the buffering, passes in the one-level adsorption tank 2 that agitator 7 is housed;
(2) one-level absorption: add by attapulgite in the above-mentioned waste liquid in one-level adsorption tank 2, acid is attapulgite modified, zeolite powder, wilkinite, the compound adsorbent that ion modification zeolite powder and organic modified zeolite powder form, carry out whip attachment 0.5 h in 60 ℃, mixing speed is 50rpm, wherein, the mass concentration of attapulgite is 30 g/L, the attapulgite modified mass concentration of acid is 50 g/L, the mass concentration of zeolite powder is 30 g/L, bentonitic mass concentration is 50 g/L, the mass concentration of sodium ion modified zeolite powder is 5 g/L, the mass concentration of organic modified zeolite powder is 20 g/L; Absorption finishes, and carries out standing sedimentation in the first grade subsides groove 3 with passing into through the suspension of the waste liquid of above-mentioned absorption reaction and compound adsorbent in the one-level adsorption tank 2, and the settling time is 10h, and sedimentation is complete, and the supernatant liquor that obtains is one-level absorption clear liquid;
(3) secondary absorption: one-level is adsorbed clear liquid pass in the secondary absorption groove 4 that agitator 7 is housed, add above-mentioned compound adsorbent again in one-level absorption clear liquid, carry out whip attachment 0.5 h in 60 ℃, mixing speed is 50 rpm; Absorption finishes, carry out standing sedimentation in the secondary subsider 5 with passing into through the suspension of the one-level of above-mentioned absorption reaction absorption clear liquid and compound adsorbent in the secondary absorption groove 4, settling time is 0.5 h, sedimentation is complete, the supernatant liquor that obtains is the secondary absorption clear liquid, be the final treatment solution of described waste liquid, secondary absorption clear liquid in the secondary subsider 5 is passed into preservation in the absorption clear liquid groove 6, simultaneously, the compound adsorbent mud of sedimentation in the secondary subsider 5 is passed in the one-level adsorption tank 2 recycle.
The mobile of liquid is to realize in the mode that pump aspirates in the above-mentioned waste liquor treatment equipment.
Embodiment 2
The treatment process of citric acid industry chromatogram waste liquid:
(1) pre-treatment: the pending chromatogram waste liquid from the citric acid production workshop enters waste liquid dashpot 1, after therein short stay and the buffering, passes in the one-level adsorption tank 2 that agitator 7 is housed;
(2) one-level absorption: add by attapulgite in the above-mentioned waste liquid in 1 grade of adsorption tank 2, acid is attapulgite modified, zeolite powder, wilkinite, the compound adsorbent that ion modification zeolite powder and organic modified zeolite powder form, carry out whip attachment 1.5 h in 63 ℃, mixing speed is 120rpm, wherein, the mass concentration of attapulgite is 65 g/L, the attapulgite modified mass concentration of acid is 30 g/L, the mass concentration of zeolite powder is 65 g/L, bentonitic quality is 30 g/L, the mass concentration of ion modification zeolite powder is 12 g/L, the mass concentration of organic modified zeolite powder is 12 g/L; Absorption finishes, and carries out standing sedimentation in the first grade subsides groove 3 with passing into through the suspension of the waste liquid of above-mentioned absorption reaction and compound adsorbent in the one-level adsorption tank 2, and the settling time is 5.5 h, and sedimentation is complete, and the supernatant liquor that obtains is one-level absorption clear liquid;
(3) secondary absorption: one-level is adsorbed clear liquid pass in the secondary absorption groove 4 that agitator 7 is housed, again add above-mentioned compound adsorbent in one-level absorption clear liquid, carry out whip attachment 1.5 h in 63 ℃, mixing speed is 120rpm; Absorption finishes, carry out standing sedimentation in the secondary subsider 5 with passing into through the suspension of the one-level of above-mentioned absorption reaction absorption clear liquid and compound adsorbent in the secondary absorption groove 4, settling time is 5.5 h, sedimentation is complete, the supernatant liquor that obtains is the secondary absorption clear liquid, is the final treatment solution of described waste liquid; Secondary absorption clear liquid in the secondary subsider 5 passed in the absorption clear liquid groove 6 preserve, simultaneously, the compound adsorbent mud of sedimentation in the secondary subsider 5 passed in the one-level adsorption tank 2 recycle.
The mobile of liquid is to realize in the mode that pump aspirates in the above-mentioned waste liquor treatment equipment.
Embodiment 3
(1) pre-treatment: the pending chromatogram waste liquid from the citric acid production workshop enters waste liquid dashpot 1, after therein short stay and the buffering, passes in the one-level adsorption tank 2 that agitator 7 is housed;
(2) one-level absorption: add by attapulgite in the above-mentioned waste liquid in one-level adsorption tank 2, acid is attapulgite modified, zeolite powder, wilkinite, the compound adsorbent that ion modification zeolite powder and organic modified zeolite powder form, carry out whip attachment 2.5h in 65 ℃, mixing speed is 180rpm, wherein, the mass concentration of attapulgite is 100 g/L, the attapulgite modified mass concentration of acid is 10 g/L, the mass concentration of zeolite powder is 100 g/L, bentonitic quality is 10 g/L, the mass concentration of sodium ion modified zeolite powder is 20 g/L, the mass concentration of organic modified zeolite powder is 5 g/L; Absorption finishes, and carries out standing sedimentation in the first grade subsides groove 3 with passing into through the suspension of the waste liquid of above-mentioned absorption reaction and compound adsorbent in the one-level adsorption tank 2, and the settling time is 0.5h, and sedimentation is complete, and the supernatant liquor that obtains is one-level absorption clear liquid;
(3) secondary absorption: one-level is adsorbed clear liquid pass in the secondary absorption groove 4 that agitator 7 is housed, again add above-mentioned compound adsorbent in one-level absorption clear liquid, and carry out whip attachment 2.5h, mixing speed is 180rpm; Absorption finishes, carry out standing sedimentation in the secondary subsider 5 with passing into through the suspension of the one-level of above-mentioned absorption reaction absorption clear liquid and compound adsorbent in the secondary absorption groove 4, settling time is 0.5h, sedimentation is complete, the supernatant liquor that obtains is the secondary absorption clear liquid, is the final treatment solution of described waste liquid; Secondary absorption clear liquid in the secondary subsider 5 passed in the absorption clear liquid groove preserve, simultaneously, the compound adsorbent mud of sedimentation in the secondary subsider 5 passed in the one-level adsorption tank 2 recycle.
The mobile of liquid is to realize in the mode that pump aspirates in the above-mentioned waste liquor treatment equipment.
The indices measurement result is referring to table 1 before and after embodiment 1～embodiment 3 citric acid chromatogram extraction method liquid waste disposal.
Table 1
By table 1 data as can be known, embodiment 3 treatment processs are the highest to the clearance of organic acid, total reducing sugar, total nitrogen, reach respectively 95%, 28%, 42%.After measured, the pH value of chromatogram waste liquid is 2.5 before processing, transmittance is 1%, through after the adsorption treatment of the present invention, the pH value of secondary absorption clear liquid reaches more than 6.0, transmittance reaches 10%, organic acid and pigment content obviously reduce, simultaneously, total reducing sugar and total nitrogen have obtained suitable reservation in the secondary absorption clear liquid, can be used as the required Carbon and nitrogen sources of mycelial growth in the fermenting process, and then are applied to raw material in the fermentative Production citric acid operation of sizing mixing, therefore, the present invention has realized the recovery and reuse of citric acid chromatogram extraction method waste liquid.
Embodiment 4
The recycling method of citric acid industry chromatogram waste liquid: the secondary absorption clear liquid in the absorption clear liquid groove among the embodiment 1 is directly used in raw slurry modulating process in the fermentative Production citric acid.
Take by weighing corn 200g, with shredder it being ground to fineness is 40 purpose Semen Maydis powder, adds the secondary absorption clear liquid that embodiment 1 adsorbs in the clear liquid groove to this Semen Maydis powder, after mixing and stirring, make the Semen Maydis powder slurry, wherein, the mass concentration of Semen Maydis powder is 200g/L in the described Semen Maydis powder slurry.
Embodiment 5
The recycling method of citric acid industry chromatogram waste liquid: the secondary in the absorption clear liquid groove among the embodiment 2 is directly used in raw material in the fermentative Production citric acid industry operation of sizing mixing.
Take by weighing cassava 250g, with shredder it being ground to fineness is 50 purpose Tapioca Starchs, adds the secondary absorption clear liquid that embodiment 2 adsorbs in the clear liquid grooves to this Tapioca Starch, after mixing and stirring, make the Tapioca Starch slurry, wherein, the mass concentration of Tapioca Starch is 250g/L in the described Tapioca Starch slurry.
The recycling method of citric acid industry chromatogram waste liquid: the secondary absorption clear liquid in the absorption clear liquid groove among the embodiment 3 is directly used in raw material in the fermentative Production citric acid industry operation of sizing mixing.
Take by weighing wheat starch 260g, with shredder it is ground to fineness 60 orders, add the secondary absorption clear liquid that embodiment 3 adsorbs in the clear liquid grooves to this wheat starch, after mixing and stirring, make wheat starch pulp, wherein, the mass concentration of W-Gum is 260g/L in the described corn starch liquid.
Embodiment 7
The recycling method of citric acid industry chromatogram waste liquid: the secondary absorption clear liquid in the absorption clear liquid groove among the embodiment 3 is directly used in raw material in the fermentative Production citric acid industry operation of sizing mixing.
Take by weighing Ipomoea batatas 320g, with shredder it being ground to fineness is 60 purpose sweet potato powder, adds the secondary absorption clear liquid that embodiment 3 adsorbs in the clear liquid grooves to this sweet potato powder, after mixing and stirring, make the sweet potato powder slurry, wherein, the mass concentration of sweet potato powder is 320g/L in the described sweet potato powder slurry.
The related raw material of above embodiment and Application Example and reagent (comprising attapulgite, zeolite powder, wilkinite, sodium ion modified zeolite powder, organic modified zeolite powder) are the commercially available prod, and institute's use industrial equipments is this area conventional equipment.
The above only is preferred implementation of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from spirit of the present invention and design, all should think to be included within protection scope of the present invention.
Claims (5)
1. the treatment process of a citric acid chromatogram extraction method waste liquid is characterized in that may further comprise the steps:
(1) one-level absorption: in described waste liquid, add the compound adsorbent that, zeolite powder attapulgite modified by attapulgite, acid, wilkinite, sodium ion modified zeolite powder and organic modified zeolite powder form, in 60～65 ℃ of whip attachment 0.5～2.5h, mixing speed is 50～180rpm, last standing sedimentation 0.5～10h, sedimentation is complete, the supernatant liquor that obtains is one-level absorption clear liquid, wherein:
The mass concentration of attapulgite is 30～100g/L,
The attapulgite modified mass concentration of acid is 10～50g/L,
The mass concentration of zeolite powder is 30～100g/L,
Bentonitic mass concentration is 10～50g/L,
The mass concentration of sodium ion modified zeolite powder is 5～20g/L,
The mass concentration of organic modified zeolite powder is 5～20g/L;
(2) secondary absorption: in step (1) gained one-level absorption clear liquid, again add above-mentioned compound adsorbent, again carrying out whip attachment and sedimentation according to the described method of step (1) processes, the supernatant liquor that obtains is the secondary absorption clear liquid, is the final treatment solution of described waste liquid.
2. the treatment process of described citric acid chromatogram extraction method waste liquid according to claim 1 is characterized in that: the described compound adsorbent recycling of step (1) and step (2) 2～5 times.
3. the recycling method of the described citric acid chromatogram of claim 1 extraction method waste liquid, it is characterized in that: gained secondary absorption clear liquid is directly used in raw slurry modulating process in the fermentative Production citric acid, its raw material with the fermentative Production citric acid is mixed and stir, make raw slurry.
4. the recycling method of described industrial chromatography extraction method waste liquid according to claim 3 is characterized in that: the raw material of described fermentative Production citric acid is selected from a kind of in Semen Maydis powder, Tapioca Starch, wheat starch, the sweet potato powder.
5. the recycling method of described citric acid chromatogram extraction method waste liquid according to claim 3 is characterized in that: the add-on of described secondary absorption clear liquid reaches 200～320 g/L with the mass concentration of raw material in described raw slurry of described fermentative Production citric acid and is as the criterion.
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| US4720579A (en) * | 1986-12-18 | 1988-01-19 | Uop Inc. | Separation of citric acid from fermentation broth with a neutral polymeric adsorbent |
| CN1034392A (en) * | 1986-12-18 | 1989-08-02 | 环球油品公司 | With means of nonzeolitic polymeric adsorbant separation of citric acid from fermented liquid |
| CN1853770A (en) * | 2005-04-27 | 2006-11-01 | 李兆辉 | Modified adsorbent for oil component in water, its production and adsorber |
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2012
- 2012-10-10 CN CN2012103817496A patent/CN102942236B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720579A (en) * | 1986-12-18 | 1988-01-19 | Uop Inc. | Separation of citric acid from fermentation broth with a neutral polymeric adsorbent |
| CN1034392A (en) * | 1986-12-18 | 1989-08-02 | 环球油品公司 | With means of nonzeolitic polymeric adsorbant separation of citric acid from fermented liquid |
| CN1853770A (en) * | 2005-04-27 | 2006-11-01 | 李兆辉 | Modified adsorbent for oil component in water, its production and adsorber |
Non-Patent Citations (1)
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| 胡志杰等: "色谱法在柠檬酸母液提纯柠檬酸工艺上的应用", 《江苏冶金》 * |
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