CN102464431A - Method for treating wastewater from diosgenin process - Google Patents
Method for treating wastewater from diosgenin process Download PDFInfo
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- CN102464431A CN102464431A CN2010105482483A CN201010548248A CN102464431A CN 102464431 A CN102464431 A CN 102464431A CN 2010105482483 A CN2010105482483 A CN 2010105482483A CN 201010548248 A CN201010548248 A CN 201010548248A CN 102464431 A CN102464431 A CN 102464431A
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Abstract
The invention relates to a method for treating wastewater from a diosgenin process. The method comprises the following steps of: treating acidic black liquor, treating production wastewater and treating soak cleaning water. According to the method, the wastewater from the diosgenin process is treated by categories, the treatment of each category of wastewater has strong pertinence, cyclic treatment can be realized, and the treatment cost is greatly lowered. The method has the advantages of relieving the toxicity to subsequent treatment units through strict and reasonable neutralization, sedimentation and other pretreatments, reducing the load of the subsequent treatment units by using the independent anaerobic treatment manner and not only reducing the production amount of sludge but also lowering the operating cost by combining lime and NaOH during pH adjustment.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, be specifically related to a kind of turmeric saponin spent process water treatment process.
Background technology
As the Han River of south water to north work centerline waterhead area, rise in Ningqiang County, Shaanxi Province stone Zhong Gou, long 918 kilometers of above basin, Danjiangkou, the cities such as Shiyan in leap Hanzhong, Shanglou, Ankang and Hubei, 100,000 square kilometres of catchment areas.According to planning, after the Danjiangkou Water Control Project retaining operation, 76% of 60% and the water yield of control Hanjiang River area.And at present, because the pollution problem of saponin processing, Hanjiang River is faced with serious threat.The successful implementation of this project will be set up standard for the Pollution abatement of the industry, and thoroughly solve the seriously polluted situation of the industry, particularly COD quantity discharged and can reduce to about 2000 tons from ten thousand tons of 15-18.
The yellow ginger industry is the geographic industry of giving special assistance in south, Shan, and particularly turmeric saponin processing industry development in recent years is very fast, becomes local people's main source of finance, yet, being accompanied by the development of yellow ginger processing industry, the pollution of diosgenin wastewater is also serious gradually.
Yet, but be phoenix feathers and unicorn horns to the diosgenin wastewater treatment process specially, and diosgenin wastewater is because acid strong, COD concentration height causes no small difficulty also for this wastewater treatment.We can say, do not handle the effective commercial run of diosgenin wastewater at present.
Summary of the invention
The object of the present invention is to provide a kind of turmeric saponin spent process water treatment process, it has solved in the background technology to the deficient technical problem of diosgenin wastewater treatment process.
Technical solution of the present invention is:
A kind of turmeric saponin spent process water treatment process, its special character is that this method comprises: acid black liquor treatment step, production wastewater treatment step and soaking and washing water treatment steps;
(1) said acid black liquor treatment step
1) add in the alkaline agent and the H in the waste water
+, generate calcium sulfate precipitation, can reduce the concentration of sulfate radical;
2) coagulative precipitation tank is set, removes the suspended particle that contains in the waste water after neutralizing;
3) up-flow anaerobic sludge blanket is provided, said up-flow anaerobic sludge blanket is made up of sludge reaction district, gas-liquid-solid three-phase separator and air chamber three parts;
Sewage from anaerobic mud bed bottom flow into sludge blanket mud mix and contact, the organism in the microbiological degradation sewage in the mud is converted into biogas to it;
Form thinner mud of sludge concentration and the water entering three phase separator that rises together on Sludge Bed top; When biogas is run into the reflecting plate of separator bottom; Be folded to reflecting plate around; Pass water layer then and get into air chamber, concentrate on air chamber biogas, derive with conduit; The solid-liquid mixed liquor gets into the settling zone of three phase separator through reflection; Mud in the sewage flocculates, and particle increases gradually, and sedimentation under the gravity effect;
The mud that is precipitated on the skew wall is slided back in the anaerobic reaction district along skew wall, makes a large amount of mud of accumulation in the reaction zone; Overflow on overflow weir top from the settling region with the treat effluent after mud separates;
4) a stripping pond is set and holds the waste water that overflow on overflow weir top from the settling region, feed the H2S stripping of a large amount of air The dissolved;
(2) production wastewater treatment step
1) up-flow anaerobic sludge blanket is provided again, carries out second-stage treatment;
2) provide a hydrolysis Aerobic Pond to carry out multistage hydrolysis aerobic treatment;
Said multistage hydrolysis is aerobic to be made up of two hydrolysis reaction and three aerobic bio-contact oxidations;
At hydrolysis stage, solid matter is degraded to dissolved matter, and macromolecular substance is degraded to small-molecule substance, is lipid acid in the souring stage carbohydrate degradation, and the mikrobe in this stage is hydrolysis bacterium, acid-producing bacteria;
It is a kind of providing under the prerequisite of free oxygen that the aerobe of waste water is handled, and handles with aerobic microbiological, makes organic matter degradation; Said aerobic microbiological processing mode is to adopt contact oxidation technology;
2) settling tank is provided; Contain the microbial film that is not dissolved in water that comes off in a large number in the waste water after the aerobic treatment, in the settling tank flow process, microbial film sinks to body bottom, pond and forms mud; And clarifying water is pooled in the water leg of being located at body top, pond, finally discharges settling tank;
3) strainer is provided, filters the water of discharging settling tank, thereby make water obtain clarification;
(3) the soaking and washing water treatment steps is:
Add in the alkaline agent and the H in the waste water
+, generate calcium sulfate precipitation, carry out the concentration that a flocculation reaction reduces sulfate radical.
Waste water all got into the equalizing tank adjusting before above-mentioned acid black liquor treatment step, production wastewater treatment step and soaking and washing water treatment steps were carried out, and the water yield of waste water and the fluctuation of water quality are adjusted to minimum.
Above-mentioned alkaline agent is that NaOH is or/and lime.
Above-mentioned suspended particle is undissolved lime and calcium sulfate particulate.
Above-mentioned particulate filter layer is a quartz sand layer.
Above-mentioned strainer is a steel filter.
The present invention has the following advantages:
(1) contain sulfuric acid in the turmeric saponin wastewater, pre-treatment such as process is strict, reasonably neutralization, deposition are so that alleviate the toxicity to the postorder processing unit.
(2) acid solution with wash sour waste water acid strong, COD concentration is high, adopts the mode of independent anaerobic treatment to reduce follow-up unitary load.
(3) the waste water sulphate content is higher, the toxicity of taking certain technical measures control sulfate reduction to become H2S to produce.
When (4) regulating pH, lime and NaOH combine, and not only reduce the generation of mud but also can reduce running cost.
(5) concentration of organic wastewater is high; Single aerobic treatment is difficult to reach drainage requirement, and it is essential therefore designing the anaerobic reaction technique unit, and it is very crucial reasonably selecting the anaerobic organic matter load; It not only can guarantee treatment effect, and can effectively reduce construction costs.
(6) select the most reasonably aerobic biochemical technology for use: because require emission standards than higher, so the selection of aerobic process is most important to waste water.Contact oxidation technology integrates the high sludge loading advantage of active sludge and biomembrance process, becomes a kind of technology that is applicable to that high-concentration hardly-degradable waste water is handled.Contact oxidation technology has the advantage of biomembrance process and activated sludge process, and clearance is high, anti impulsion load, no stink; Generally do not need mud to reflux, the probability that produces sludge bulking is little, does not also give birth to the filter tank fly; Take up an area of advantages such as few, saving working cost, design BOD volumetric loading is high.This technology is specially adapted to the improvement of the high wastewater from chemical industry of entering organic matter of water concentration, food wastewater, dyeing waste water, fruit juice wastewater etc.
(7) hydrolysis reaction replenishes as the useful of biology aerobic reaction, can reduce SMP material in the water outlet to greatest extent, guarantees that water outlet is up to standard.
Description of drawings
Fig. 1 is a process flow sheet of the present invention:
Fig. 2 is the wastewater treatment water yield of the present invention and COD state diagram.
Embodiment
The turmeric saponin wastewater treatment process is divided into three steps, promptly acid black liquor treatment step, production wastewater treatment step and soaking and washing water treatment steps.Acid black liquor treatment step is admitted acid black liquor; The production wastewater treatment step process comprises barrier film press filtration clear liquid, poaching wastewater; The soaking and washing water treatment steps is handled soaking and washing waste water, equipment cleaning water and domestic water.
Process method details:
(1) acid black liquor treatment step
1) equalizing tank
Get into the waste water of Waste Water Treatment, its water yield and water quality all possibly change at any time, and this normal operation to the wastewater treatment structures is very unfavorable.The fluctuation of the water yield and water quality is big more, and treatment effect is just more unstable, even can make the subject to severe risks of damage of waste water treatment process process.For reducing the influence of the water yield and water quality change to the waste water treatment process process; Before Waste Water Treatment, equalizing tank should be set; With all with water quality, deposit to be full of and fill a vacancy, make equalizing tank have in the anti-spent process water acid, alkali impact capacity simultaneously, strengthen the regulating effect of equalizing tank; Make the subsequent disposal structures in run duration, can obtain isostatic flooding quantity and stable water quality, and reach the ideal treatment effect.
2) neutralization reaction
The essence of neutralization reaction is H
+And OH
-In conjunction with generating water (H
2O).Be that acid black liquor presents stronger acidity,, will influence follow-up biological treatment process, so need carry out a series of processing if do not neutralize acidity.Acid waste water needs to neutralize with alkali, in this process, adopts two kinds of alkaline agents, i.e. NaOH and lime.Carry out neutralizing treatment with white lime, generate calcium sulfate precipitation, can reduce the concentration of sulfate radical, reduce disadvantageous effect.The body refuse amount of considering in the independent employing lime simultaneously and being brought is excessive, and over-burden in follow-up sludge treatment unit, adopts NaOH and lime to unite and adds the generation that can reduce body refuse effectively.
3) flocculation reaction
Contain a certain amount of suspended particle (undissolved lime and calcium sulfate particulate) in the waste water after the neutralization, coagulative precipitation tank is set, purpose is in order to remove this part suspended particle.
4) one-level UASB
Up-flow anaerobic sludge blanket (UASB) is made up of sludge reaction district, gas-liquid-solid three-phase separator (comprising the settling region) and air chamber three parts.In the reaction zone of bottom, retain a large amount of anaerobic sludges, the mud with good sedimentation function and cohesion performance forms sludge blanket in the bottom.The sewage of handling from anaerobic mud bed bottom flow into sludge blanket mud mix and contact, the organism in the microbiological degradation sewage in the mud is converted into biogas to it.Biogas is constantly emitted with the micro-bubble form, and micro-bubble constantly merges in uphill process; Form bigger bubble gradually, on Sludge Bed top because the stirring of biogas forms the thinner mud of sludge concentration and the water entering triphase separator that rises together, when biogas is run into the reflector of separator bottom; Be folded to reflector around, pass water layer then and get into air chamber, concentrate on air chamber biogas; Derive with conduit, the solid-liquid mixed solution is through the settling region of reflection entering triphase separator, and the mud in the sewage flocculates; Particle increases gradually, and sedimentation under action of gravity.The mud that is precipitated on the skew wall is slided back in the anaerobic reaction district along skew wall, makes a large amount of mud of accumulation in the reaction zone, overflows on overflow weir top from the settling region with the treat effluent after mud separates, and gets into the next stage unit.
5) stripping pond
The water outlet of one-level UASB contains H2S, will produce damaging influence to follow-up biological treatment.Feeding a large amount of air can reduce the concentration in the water with the H2S stripping of The dissolved, helps follow-up processing.
The processing of acid solution processing subsystem gets into the factory effluent subsystem.
(2) production wastewater treatment step
Structures functions such as this system's liquid storing pool, secondary UASB pond are identical with the acid solution system.
1) the multistage hydrolysis is aerobic
The multistage hydrolysis is aerobic to be made up of two hydrolysis reaction and three aerobic bio-contact oxidations.Hydrolytic bacteria and aerobic bacteria are two kinds of dissimilar mikrobes, and multistage hydrolysis aerobic process formally utilizes this two quasi-microorganisms alternation response, reduce the COD. in the waste water
At hydrolysis stage, solid matter is degraded to dissolved matter, and macromolecular substance is degraded to small-molecule substance, is lipid acid in the souring stage carbohydrate degradation, and the major microorganisms in this stage is hydrolysis bacterium, acid-producing bacteria.
It is a kind of providing under the prerequisite of free oxygen that the aerobe of waste water is handled, and is main with aerobic microbiological, makes organic matter degradation, stable method for innocent treatment.The various organism that exist in the waste water, mainly the organism with colloidal, The dissolved is main, as the nutrition source of mikrobe.The organic substance of these high energy positions releases energy through a series of biochemical reaction step by step, and finally the inorganic substance with the low energy position settle out, reach innoxious requirement so that further get back to physical environment and properly disposal.Aerobe is handled and is adopted contact oxidation technology.
Contact oxidation technology is in processing structures, to hang biologic packing material, makes biofilm development, attached on these fillers, increases the living weight of biological treatment system whereby, strengthens the biodegradability of organic pollutant in the sewage.
2) deposition
Contain the microbial film that is not dissolved in water that comes off in a large number in the waste water that Aerobic Pond is discharged,, will influence system's effluent quality from water if these materials can not effectively separate.Waste water is in the settling tank flow process, and microbial film sinks to body bottom, pond and forms mud, and clarifying water is pooled in the water leg of being located at body top, pond, finally discharges settling tank.
3) strainer
Sewage inevitably carries SS through behind the settling tank in the water outlet.In order further to improve solid-liquid separation effect, the normal filtration method that adopts is handled in the practice.Filtration is with the impurity in the particulate filter layer with space (like silica sand etc.) trap water, thereby makes water obtain clarifying technological process.Filtering effect is not only can further reduce the turbidity of water, and can remove a part of organic substance in the water, reduces the COD concentration of water outlet.Common strainer is made up of water inlet manifold, filter material layer, supporting layer, water distribution system and drainage pipeline etc.Strainer is a steelwork, is shaped as cylindrical.
Process calculation of the present invention:
(1) acid black liquor treatment step
1) equalizing tank
Acid black liquor: Q=120m
3/ d, COD=100000mg/L;
Design HRT=46h, useful volume 230m
3Equalizing tank size 10000 * 5500 * 5000mm, available depth 4500mm.
2) neutralization reaction groove
Reaction times 0.8h, reactive tank volume V=4m
3, size 1600 * 1600 * 2000mm, available depth 1600mm.1 whisking appliance is set.
3) flocculation reaction groove
Reaction times 0.8h, reactive tank volume V=4m
3, size 1600 * 1600 * 2000mm, available depth 1600mm.1 whisking appliance is set.It is 1.5mg/L that PAM adds dose.
4) settling tank 1
Adopt vertical sedimentation basin, desilting area is made as 3000 * 3000, and surface load is 0.45m
3/ (m
2H), useful volume 36m
3
5) intermediate pool
Design HRT=8h, useful volume 40m
3Equalizing tank size 3000 * 3000 * 5000mm, available depth 4500mm.
6) one-level UASB reaction tank
The COD amount that gets into UASB every day is 12t/d, and the UASB influent load is elected 3.3kg/ (m as
3D), useful volume is 3600m
3Be provided with 6, every pool volume is 600m
3
7) stripping pond
Design HRT=1.5h adds MnSO simultaneously
4, it is 7.5m that the pond holds
3
8) settling tank 2
Adopt vertical sedimentation basin, desilting area is made as 3000 * 3000, and surface load is 0.45m
3/ (m
2H), useful volume 36m
3
(2) production wastewater treatment step
1) equalizing tank
Barrier film press filtration clear liquid: Q=540m
3/ d, COD=10000mg/L;
Poaching wastewater: Q=620m
3/ d, COD=6000mg/L;
Mixed water: Q=1160m
3/ d, COD=7860mg/L;
Design HRT=17h, useful volume 870m3.Equalizing tank size 20000 * 10000 * 5000mm, available depth 4500mm.
2) neutralization reaction pond
Reaction times 0.8h, useful volume 40m
3, size 5000 * 2000 * 2000mm, available depth 4000mm.In establish one of submersible agitator.
3) intermediate pool 1
Be the suction sump of UASB reaction tank, hydraulic detention time 3h, useful volume 160m
3, size 8000 * 5000 * 2000mm, available depth 4000mm.
4) UASB reaction tank
Admit the waste water of factory effluent and erie black liquid treating system, Q=1280m
3/ d, COD=10000mg/L.
The COD amount that gets into UASB every day is 12.8t/d, and the UASB influent load is elected 3.3kg/ (m as
3D), useful volume 3840m
3Be provided with 6, every pool volume is 640m3.
5) multistage hydrolysis aerobe treatment system
Admit the waste water of factory effluent, acid black liquor and soaking and washing water treatment system, Q=2235m
3/ d, COD=2400mg/L, BOD is about 800mg/L.
The BOD amount that get into every day is 1788kg/d, and volumetric loading is got 0.3kg/m
3, then useful volume is 6720m
3Three Aerobic Ponds and two hydrolytic tanks are set, and Aerobic Pond list pool volume is 1680m
3, hydrolytic tank list pool volume is 840m
3
Aerobic Pond 2, hydraulic detention time 18h, the pond holds 1680m
3, size 25000 * 15000 * 5000mm, available depth 4500mm.
Hydrolytic tank 2, hydraulic detention time 12h, the pond holds 840m
3, size 25000 * 7500 * 5000mm, available depth 4500mm.
Aerobic Pond 3, hydraulic detention time 18h, the pond holds 1680m
3, size 25000 * 15000 * 5000mm, available depth 4500mm.
6) second-level settling pond
Admit the waste water of factory effluent, acid black liquor and soaking and washing water treatment system, Q=2235m
3/ d.
Surface load is 0.65m
3/ (m
2H), desilting area is 140m
2, the pond holds 420m
3
7) intermediate pool 2
Be the suction sump of strainer, hydraulic detention time 1.7h, useful volume 160m
3, size 8000 * 5000 * 2000mm, available depth 4000mm.
8) strainer
Admit the waste water of factory effluent, acid black liquor and soaking and washing water treatment system, Q=2235m
3/ d=93m
3/ h.
Design filtering velocity 4.4m
3/ h selects the quartz sand filtration device of five Φ 2600 * 4200mm for use, and four-function one is equipped with.
Claims (6)
1. a turmeric saponin spent process water treatment process is characterized in that this method comprises: acid black liquor treatment step, production wastewater treatment step and soaking and washing water treatment steps;
(1) said acid black liquor treatment step
1) add in the alkaline agent and the H in the waste water
+, generate calcium sulfate precipitation, can reduce the concentration of sulfate radical;
2) coagulative precipitation tank is set, removes the suspended particle that contains in the waste water after neutralizing;
3) up-flow anaerobic sludge blanket is provided, said up-flow anaerobic sludge blanket is made up of sludge reaction district, gas-liquid-solid three-phase separator and air chamber three parts;
Sewage from anaerobic mud bed bottom flow into sludge blanket mud mix and contact, the organism in the microbiological degradation sewage in the mud is converted into biogas to it;
Form thinner mud of sludge concentration and the water entering three phase separator that rises together on Sludge Bed top; When biogas is run into the reflecting plate of separator bottom; Be folded to reflecting plate around; Pass water layer then and get into air chamber, concentrate on air chamber biogas, derive with conduit; The solid-liquid mixed liquor gets into the settling zone of three phase separator through reflection; Mud in the sewage flocculates, and particle increases gradually, and sedimentation under the gravity effect;
The mud that is precipitated on the skew wall is slided back in the anaerobic reaction district along skew wall, makes a large amount of mud of accumulation in the reaction zone; Overflow on overflow weir top from the settling region with the treat effluent after mud separates;
4) a stripping pond is set and holds the waste water that overflow on overflow weir top from the settling region, feed the H2S stripping of a large amount of air The dissolved;
(2) production wastewater treatment step
1) up-flow anaerobic sludge blanket is provided again, carries out second-stage treatment;
2) provide a hydrolysis Aerobic Pond to carry out multistage hydrolysis aerobic treatment;
Said multistage hydrolysis is aerobic to be made up of two hydrolysis reaction and three aerobic bio-contact oxidations;
At hydrolysis stage, solid matter is degraded to dissolved matter, and macromolecular substance is degraded to small-molecule substance, is lipid acid in the souring stage carbohydrate degradation, and the mikrobe in this stage is hydrolysis bacterium, acid-producing bacteria;
It is a kind of providing under the prerequisite of free oxygen that the aerobe of waste water is handled, and handles with aerobic microbiological, makes organic matter degradation; Said aerobic microbiological processing mode is to adopt contact oxidation technology;
2) settling tank is provided; Contain the microbial film that is not dissolved in water that comes off in a large number in the waste water after the aerobic treatment, in the settling tank flow process, microbial film sinks to body bottom, pond and forms mud; And clarifying water is pooled in the water leg of being located at body top, pond, finally discharges settling tank;
3) strainer is provided, filters the water of discharging settling tank, thereby make water obtain clarification;
(3) the soaking and washing water treatment steps is:
Add in the alkaline agent and the H in the waste water
+, generate calcium sulfate precipitation, carry out the concentration that a flocculation reaction reduces sulfate radical.
2. according to the said turmeric saponin spent process water of claim 1 treatment process; It is characterized in that; Waste water all got into the equalizing tank adjusting before said acid black liquor treatment step, production wastewater treatment step and soaking and washing water treatment steps were carried out, and the water yield of waste water and the fluctuation of water quality are adjusted to minimum.
3. according to claim 1 or 2 said turmeric saponin spent process water treatment processs, it is characterized in that: said alkaline agent is that NaOH is or/and lime.
4. according to the said turmeric saponin spent process water of claim 3 treatment process, it is characterized in that: said suspended particle is undissolved lime and calcium sulfate particulate.
5. according to the said turmeric saponin spent process water of claim 4 treatment process, it is characterized in that: said particulate filter layer is a quartz sand layer.
6. according to the said turmeric saponin spent process water of claim 5 treatment process, it is characterized in that: said strainer is a steel filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105482483A CN102464431A (en) | 2010-11-15 | 2010-11-15 | Method for treating wastewater from diosgenin process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105482483A CN102464431A (en) | 2010-11-15 | 2010-11-15 | Method for treating wastewater from diosgenin process |
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| CN102464431A true CN102464431A (en) | 2012-05-23 |
Family
ID=46068599
Family Applications (1)
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|---|---|---|---|
| CN2010105482483A Withdrawn CN102464431A (en) | 2010-11-15 | 2010-11-15 | Method for treating wastewater from diosgenin process |
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| Country | Link |
|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643640A (en) * | 2019-10-10 | 2020-01-03 | 华南农业大学 | Method for producing biogas by extracting dioscorea composita saponin waste liquid and waste residue by using aluminum trichloride |
| CN110734199A (en) * | 2019-11-18 | 2020-01-31 | 青岛联盛益康食品科技有限公司 | garlic processing wastewater treatment process |
| CN111573980A (en) * | 2020-05-22 | 2020-08-25 | 西南科技大学 | Treatment process of wastewater containing ammonium sulfate and high content of organic matters |
-
2010
- 2010-11-15 CN CN2010105482483A patent/CN102464431A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643640A (en) * | 2019-10-10 | 2020-01-03 | 华南农业大学 | Method for producing biogas by extracting dioscorea composita saponin waste liquid and waste residue by using aluminum trichloride |
| WO2021068992A1 (en) * | 2019-10-10 | 2021-04-15 | 华南农业大学 | Method for producing biogas from waste liquid from diosgenin extraction using aluminum chloride |
| US11920176B2 (en) | 2019-10-10 | 2024-03-05 | South China Agricultural University | Method for producing biogas from waste liquid/residue after diosgenin extraction from Dioscorea composita by aluminum chloride |
| CN110734199A (en) * | 2019-11-18 | 2020-01-31 | 青岛联盛益康食品科技有限公司 | garlic processing wastewater treatment process |
| CN111573980A (en) * | 2020-05-22 | 2020-08-25 | 西南科技大学 | Treatment process of wastewater containing ammonium sulfate and high content of organic matters |
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Application publication date: 20120523 |