CN103304107B - A kind of method processing oranges and tangerines can pectin wastewater - Google Patents
A kind of method processing oranges and tangerines can pectin wastewater Download PDFInfo
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- CN103304107B CN103304107B CN201310277785.2A CN201310277785A CN103304107B CN 103304107 B CN103304107 B CN 103304107B CN 201310277785 A CN201310277785 A CN 201310277785A CN 103304107 B CN103304107 B CN 103304107B
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Abstract
The invention discloses a kind of method processing oranges and tangerines can pectin wastewater.Adopt the method that mechanical grille and coagulating sedimentation, aeration air supporting combine with microorganism advanced treatment, in microbial reaction pond, wherein added a kind of ripe thalline of fungi letter mould in microorganism advanced treatment process, under the katalysis of the polygalacturonase of the ripe thalline generation of simple mould, pectin degrading in waste water is small organic molecule galacturonic acid and galacturonic acid methyl esters, and the highest degradation efficiency of simple mould to pectin is 97.4%; Simple mould is to waste water COD simultaneously
crdegraded also there is good effect, to COD
crthe highest degradation efficiency be 89.9%; Through this technical process, the organic content of waste water and viscosity are very low, reach " integrated wastewater discharge standard " GB8978-1996 secondary discharge standard, realize qualified discharge.It is low that this technique has energy consumption, and technological operation is simple, can not cause the advantages such as secondary pollution simultaneously.<!--1-->
Description
Technical field
The present invention relates to a kind of method processing oranges and tangerines can pectin wastewater, particularly refer to adopt mechanical filter and coagulating sedimentation, air supporting and microorganism advanced treatment to process oranges and tangerines can pectin wastewater.
Background technology
Oranges and tangerines can factory effluent quantity discharged is large, complicated component, containing a large amount of acid, pericarp, pulp, carbohydrate, pectin etc. in waste water, and COD
crhigh etc. Pollutant levels, effluent part COD
crconcentration up to 10000mg/L, average 3500mg/L; BOD is up to 2000mg/L, average 1500mg/L; Waste water quality BOD/COD
cr>0.3, wastewater biodegradability is better; The basic slant acidity of pH; Particularly contain pectin 500-3000mg/L in waste water.Pectin another name is soluble pectin, and its component is galactan aldehydic acid methyl esters and galacturonic acid, and relative molecular mass is 5.0-15.0 ten thousand, and relative density is about 0.7, without definite melting point, can be water-soluble, and be insoluble to ethanol and other organic solvents; The aqueous solution is in acid, and the water being dissolved in 20 times becomes viscous liquid.Pectin has very high viscosity, and meeting blocking pipe in waste water course of conveying, so the process of pectin is the bottleneck of oranges and tangerines can pectin wastewater process.
In common oranges and tangerines can pectin wastewater, the treatment process of pectin has a lot, traditional method polygalacturonase direct breakdown method, although the method process water yield is large, treatment effect is better, equipment is simple, but the expensive cost of enzyme is high, simultaneously higher to the Property requirements of waste water; Adopt the method for alcohol settling pectin, alcohol consumption is large, and the rise year by year of alcohol price, makes production cost high in addition, and pectin extraction rate is not high simultaneously, and the pectin purity of extraction is not high yet, can produce a large amount of waste water again in leaching process.Therefore develop one and more effectively process oranges and tangerines can pectin wastewater technology with alternate physical process and materializing strategy process, have very important significance.Adopt the method that combines with biotechnology of materialization can pectin composition effectively in Decomposition Wastewater, simultaneously to waste water COD
crdegraded also there is good effect, it is low that its method has energy consumption, and technological operation is simple, can not cause the advantages such as secondary pollution simultaneously.
Mechanical filter can tackle the pollutent in suspension or levitated state, as tangerine peel, tangerine pith etc., to ensure the normal operation of follow-up buildings and water pump assembly; To aeration in water in air supporting process, add the dissolved oxygen in water, this is very favorable to follow-up biochemical treatment.Microorganism advanced treatment process flexible operation, anti impulsion load, can prevent sludge bulking, computer-aided traffic control, effluent quality is good, and floor space and base construction investment little, and be a kind of aerobic suspension growth treatment technology, the problem of the waste water that there will not be viscosity high blocking filler.The simple mould used, buys in Institute of Microorganism, Academia Sinica, is numbered CGMCC3.3241.This strain letter mould belongs to the one of mould, non-pathogenic bacteria, and its meta-bolites is safe, aerobic, and optimum growth temperature is 25-28 DEG C, optimal pH 6.0-6.5, can in waste water growth and breeding.Letter mould can produce polygalacturonase in metabolic process.Polygalacturonase is a class prozyme of decompose pectin matter, makes pectin degrading be galacturonic acid, galacturonic acid methyl esters etc.Pectin in waste water can induce simple mould to produce polygalacturonase as a kind of inductor, thus accelerates pectin degrading; Pectin also can be utilized by microorganism as the carbon source of microorganism simultaneously.Therefore microorganism deep treatment method process oranges and tangerines can pectin wastewater is adopted to be feasible.
Summary of the invention
The object of the invention is to the related vulnerability overcoming prior art, a kind for the treatment of process of oranges and tangerines can pectin wastewater is provided, realizes the qualified discharge of waste water.
The present invention is realized by following steps, and its method steps is:
A, mechanical filter and coagulating sedimentation
By the grid of oranges and tangerines can pectin wastewater by 15-30mm, to tackle in suspend or the pollutent of levitated state (as tangerine peel, tangerine pith etc., normally runs to protect follow-up structures and water pump assembly; Water through grid filtration is passed in high-efficiency coagulative precipitation tank, at ambient temperature, regulate oranges and tangerines can pectin wastewater pH6-8, add 0.4% polyacrylamide PAM, the volume of PAM solution and the volume ratio of waste water is made to be 1:40, stirring velocity is 800-1200r/min, stirs 5-15min and removes part COD
crand SS, establish mud scraper in pond.Mud after precipitation enters sludge thickener.
B, aeration air supporting
Waste water after grid filtration is passed in air flotation pool, adopts the pneumatically supported method of aeration.The mud generated in air supporting process also enters sludge thickener.Due to aeration in water in process waste water, add the dissolved oxygen in water, this is very favorable to follow-up biochemical treatment.
C, microorganism advanced treatment
Sequencing batch reactor is passed into through pneumatically supported waste water, ripe simple mould thalline is added in reactor, and in oxidation pond, add the nutritive substance of microorganism, make m (C): m (N): m (P)=100:10:1, and adopt aerating apparatus aeration, make the dissolved oxygen content in waste water remain on 0.8-1.0mg/L.Ripe simple mould thalline is the thalline cultivating 3-5d in advantage substratum; The composition of advantage substratum: sucrose 20g/L, NaNO
34g/L, K
2hPO
41g/L, KCl0.5g/L, MgSO
4.7H
2o0.5g/L, FeSO
40.01g/L.Tamed in waste water by simple mould, when processing continuously waste water after domestication maturation, hydraulic detention time is 12-18h, and aeration time is 10-16h.
The present invention compares traditional method and has following advantage:
The present invention is directed to the technical barrier of current oranges and tangerines can pectin wastewater process, the method adopting physical technique to combine with biotechnology processes waste water.In antimicrobial treatment process, simple mould can depolymerized pectin better, pectin degrading is become the small organic molecule such as galacturonic acid, galacturonic acid methyl esters, simple mould consumes the organism in waste water simultaneously, greatly reduce organic content in waste water, reach the object of purifying waste water, overcome the problem that traditional polygalacturonase direct edman degradation Edman cost is high; Secondly do not use active sludge in treatment process, avoid the problem occurring sludge dewatering difficulty and secondary pollution, through above-mentioned steps to reach the object of the pectin in degrading waste water.Visible, technique of the present invention have employed the method that physics and microbiological treatment combine, and the waste water after process can qualified discharge.The method is simple to operation, and cost is low, can not produce secondary pollution, and the efficiency of process pectin is high, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of oranges and tangerines can pectin wastewater process.
Embodiment
Be described below by way of embodiment: in Hunan oranges and tangerines can factory actual water sample, this oranges and tangerines can pectin wastewater is in acid, and pH value is 3 ~ 7, the chemical oxygen demand (COD) (COD of Equations of The Second Kind pollutent in waste water
cr), five-day BOD (BOD
5), suspended substance (SS) content is higher, far away higher than the highest permission emission concentration of two pollutants in " integrated wastewater discharge standard ", pectin content simultaneously in waste water is very high, and the specific targets of main water quality and " integrated wastewater discharge standard " GB8978-1996 secondary discharge standard are in table 1.
Table 1 oranges and tangerines can pectin wastewater water quality and emission standard
Below in conjunction with Figure of description, progressive explanation is done to the present invention:
According to operating procedure of the present invention, oranges and tangerines can pectin wastewater processing technological flow as shown in drawings, carries out the process of oranges and tangerines can pectin wastewater.Its method steps is as follows:
1) mechanical filter and coagulating sedimentation
By the grid of oranges and tangerines can pectin wastewater by 15-30mm, to tackle in suspend or the pollutent of levitated state (as tangerine peel, tangerine pith etc., normally runs to protect follow-up structures and water pump assembly.Then the waste water after grid filtration is joined in coagulation basin, at ambient temperature, regulate oranges and tangerines can pectin wastewater pH6-8, add 0.4% polyacrylamide PAM, make the volume ratio 1:40 of polyacrylamide PAM solution and waste water.Stirring velocity is 1000r/min, stirs 10min and removes part COD
crand SS.Now, COD
crclearance be 35%-40%.
2) aeration air supporting
Adopt the hydrophobicity fine solid in aeration air-float method removal waste water or liquid suspension material, as fiber, pericarp chip etc.Aeration time is 10-20min.Now, COD
crclearance be 12%-15%.
3) microorganism advanced treatment
The BOD of two kinds of intake waste water
5/ COD
cr.>0.3, good biodegradability.Join in oranges and tangerines can pectin wastewater by cultured ripe thalline letter mould, domestication 1-2d continuously passes into waste water after thalline maturation, adopts the method for mechanical aeration, and the dissolved oxygen content in same maintenance waste water remains on 0.8-1.0mg/L.Hydraulic detention time is 12-18h.In order to the needs of satisfied simple mould growth, tame and all will add a certain amount of trace element and carbon nitrogen phosphorus in treating processes in actual waste water, wherein, m (C): m (N): m (P)=100:10:1.Required various trace element is configured to nutritive medium, adds by the amount of every premium on currency 0.5ml nutritive medium.Often liter of microelement nutritious liquid configuration is as follows: 0.5gKCl, 0.5gMgSO
47H
2o.
After above-mentioned art breading, the quality of waste water obviously improves, and each index in waste water is as follows:
Physico-chemical property after the process of table 2 oranges and tangerines can pectin wastewater
The waste water of total sewage draining exit is through the degraded of above-mentioned technique and simple mould, and the concentration range of decrease of pectin is very large, and the adaptability of simple mould to soda acid is stronger, very high to the pectin degrading rate in pectin wastewater, degradation rate reaches 97.4%, and the concentration of pectin is reduced to 45mg/L, greatly reduces the viscosity of waste water; COD
crvalue be reduced to 136mg/L, reach the secondary standard of composite wastewater emission standard.Soda acid washes waste water COD
crvalue is reduced to about 526mg/L, and BOD value is reduced to 78mg/L.In the middle of actual procedure, in order to the secondary standard that each index of acidic and alkaline waste water can be made to reach composite wastewater emission standard, can mix with sour alkali-wash waste water 2:1 by total sewage draining exit waste water, mixed waste water COD
crfor 4900mg/L, through above-mentioned treatment process average COD
crlower than 150mg/L, reach the secondary standard of composite wastewater emission standard.
Claims (5)
1. process a method for oranges and tangerines can pectin wastewater, it is characterized in that, adopt the method that mechanical filter and coagulating sedimentation, aeration air supporting and microorganism advanced treatment combine, reduce the COD in waste water
crvalue and pectin content, thus realize the qualified discharge of waste water, the concrete steps of this treatment process are as follows:
A, mechanical filter and coagulating sedimentation
Mix with sour alkali-wash waste water 2:1, by the grid of 15-30mm by the pectin wastewater producing the generation of oranges and tangerines can; Waste water through grid filtration is flow in high-efficiency coagulative precipitation tank, at ambient temperature, regulate oranges and tangerines can pectin wastewater pH6-8, add 0.4% polyacrylamide (PAM), the volume of PAM solution and the volume ratio of waste water is made to be 1:40, stirring velocity is 800-1200r/min, stirs 5-15min and removes part COD
crand SS, establish mud scraper in pond, the mud after precipitation enters sludge thickener;
B, aeration air supporting
Waste water through coagulative precipitation tank is passed in air flotation pool, and the pneumatically supported method of employing aeration removes the pectin in waste water further, and the solid waste that air supporting process generates also enters sludge thickener;
C, microorganism advanced treatment
Waste water through step B process enters into microbial reaction pond, adds the ripe thalline of simple mould to reaction tank, and adopt method of microorganism to process, the organism in waste water is degraded further, final qualified discharge.
2. a kind of method processing oranges and tangerines can pectin wastewater according to claim 1, is characterized in that: waste water quality situation is: COD
crcontent is 1500-8000mg/L, the content of pectin is 500-3000mg/L, BOD/COD
cr>0.3.
3. a kind of method processing oranges and tangerines can pectin wastewater according to claim 1, is characterized in that: simple mould has good degradation effect to pectin, and the simple mould for the treatment of waste water is ripe thalline; Ripe simple mould thalline is the thalline cultivating 3-5d in advantage substratum; The composition of advantage substratum: sucrose 20g/L, NaNO
34g/L, K
2hPO
41g/L, KCl0.5g/L, MgSO
4.7H
2o0.5g/L, FeSO
40.01g/L.
4. a kind of method processing oranges and tangerines can pectin wastewater according to claim 1, it is characterized in that: adopt microbial process process pectin wastewater, acclimation need be carried out to simple mould, tame and m (C): m (N): m (P)=100:10:1 in wastewater treatment process, wherein: carbon source is pectin wastewater, nitrogenous source is preferably (NH
4)
2sO
4, phosphorus source is preferably K
2hPO
4.
5. a kind of method processing oranges and tangerines can pectin wastewater according to claim 1, it is characterized in that: after to the simple mould domestication maturation in microorganism advanced treatment reaction tank, waste water is processed continuously, in microorganism advanced treatment process, hydraulic detention time is 12-18h, and aeration time is 10-16h.
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| CN103951097A (en) * | 2014-04-23 | 2014-07-30 | 苏州羽帆新材料科技有限公司 | Method for treating fruit processing waste water |
| CN104529074B (en) * | 2014-12-30 | 2016-08-17 | 中机国际工程设计研究院有限责任公司 | Processing citrus canned food high concentration pectin wastewater processing means |
| CN104671376B (en) * | 2015-01-30 | 2017-04-12 | 长沙理工大学 | Process for treating high-concentration pectin wastewater |
| CN104609524B (en) * | 2015-01-30 | 2017-02-01 | 长沙理工大学 | Treatment method of orange can production wastewater |
| CN105174602B (en) * | 2015-07-17 | 2017-11-17 | 杨利人 | A kind of pectin wastewater decomposes drying and other treatment technique |
| CN105417885A (en) * | 2015-12-28 | 2016-03-23 | 中机国际工程设计研究院有限责任公司 | Apparatus for processing high-concentration pectin waste water from oranges and tangerines processing |
| CN106565060B (en) * | 2016-11-14 | 2019-07-19 | 中南大学 | A kind of processing method of the cumquat preserved fruit processing waste water of high organic matter with high salt |
| CN107226591B (en) * | 2017-07-21 | 2020-05-22 | 河北陆诚环保科技有限公司 | Organic sewage treatment method combining supercritical water and photocatalytic oxidation |
| CN107324590A (en) * | 2017-07-21 | 2017-11-07 | 邵阳心连心食品有限公司 | A kind of mandarin orange can production wastewater treatment technique |
| CN111410362A (en) * | 2020-03-27 | 2020-07-14 | 普洱普蓝环境咨询有限公司 | Method for treating coffee primary processing wastewater |
| CN114315034B (en) * | 2021-12-30 | 2022-12-16 | 华夏碧水环保科技股份有限公司 | Lemon processing wastewater treatment system and process |
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