CN205603431U - Strengthening biological degradation preliminary treatment printing and dyeing destarch waste water PVA's device - Google Patents
Strengthening biological degradation preliminary treatment printing and dyeing destarch waste water PVA's device Download PDFInfo
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- CN205603431U CN205603431U CN201620442857.3U CN201620442857U CN205603431U CN 205603431 U CN205603431 U CN 205603431U CN 201620442857 U CN201620442857 U CN 201620442857U CN 205603431 U CN205603431 U CN 205603431U
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Abstract
The utility model discloses a strengthening biological degradation preliminary treatment printing and dyeing destarch waste water PVA's device belongs to the waste water treatment field. It includes anaerobism UASB pond, mixed zone, anaerobism hydrolysis UASB pond and stability region, and wherein, anaerobism UASB pond, mixed zone, anaerobism are hydrolysised UASB ware and stability region and is connected gradually, and the play water of stability region gets into secondary treatment, and the anaerobism is hydrolysised the water end (W. E. ) of UASB ware and is connected with intaking to hold. Anaerobism UASB pond includes anaerobism UASB pond I and anaerobism UASB pond II, and printing and dyeing destarch waste water PVA flows in anaerobism UASB pond I and anaerobism UASB pond II's entry respectively simultaneously, anaerobism UASB pond I and anaerobism UASB pond II's export all with the entry linkage of mixed zone. Be equipped with granular sludge in the anaerobism UASB pond, the play water end (W. E. ) and the end of intaking in anaerobism UASB pond are connected. Its energy consumption is low, investment and running cost are low, and resistance impact load capacity is strong.
Description
Technical field
The invention belongs to field of waste water treatment, be specifically related to a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA
Device.
Technical background
China's textile industry industrial chain is complete, A wide selection of colours and designs, is the advantage pillar industry of China, important people's livelihood industry and state
The obvious industry of border competitive advantage, occupies an important position in the national economic development.China's cotton yarn, cotton, woollen goods, silk,
Chemical fibre, clothing Isoquant all rank first in the world.The fast development of textile industry so that slurry uses abundant species, mainly includes
Starch, polyvinyl alcohol (PVA) and acrylic acid (ester) three major types.And in the slurry that China consumes, starch (modified starch and Yuan Dian
Powder) account for 60%, PVA accounts for 30%, and acrylic compounds and other slurry account for 10%.The PVA degree of polymerization is at 200-4000 the most both at home and abroad
Between, owing to PVA is with a lot of hydroxyls, it is a kind of hydrophilic macromolecular compound, soluble in water.The biodegradability pole of PVA
Low, BOD5/CODCrValue is less than 0.01, and intractability is big, and PVA has become as the difficult point that China is treatment of dyeing wastewater, to environment
Cause serious pollution.
Both at home and abroad the administering method containing PVA waste water mainly there are physico-chemical process and biochemical process.Wherein physico-chemical process is mainly with ultrafiltration
Saltout, the technology such as oxidizing, photochemical catalytic oxidation, such technological investment is big, and operating cost is high, and operation management is complicated, especially
Succeeding level-two biochemical treatment impact is big.Biochemical process mainly has anaerobic process, activated sludge process etc., and it is steady that such technology has treatment effect
Qualitative difference, PVA removal efficiency is the highest, be difficult to form single-minded PVA dominant microflora.Along with the development of biotechnology, separate efficiently
PVA degradation bacteria and extract the biological reinforcing technology of PVA digestive enzyme and become the focus of research, but single microorganism to be leaned on realize right
The thoroughly degraded of PVA is extremely difficult, and PVA digestive enzyme is few due to producing strains kind, and cultivation cycle length, enzyme are lived low, add
Upper digestive enzyme purification is difficult, so the rarest report used in actual production about PVA digestive enzyme.In order to meet dyeing
The discharge standard of increasingly stringent and power conservation requirement, anaerobic treatment be can yet be regarded as optimum method.Anaerobe to high concentration, press down
Property Organic substance processed and other unfavorable conditions have the strongest tolerance.S.Matsumura et al. is to PVA under anaerobic
Biodegradability is studied in detail, and through cultivation and the domestication of four months, the PVA of 60% can be given birth to by anaerobic treatment
Thing is degraded.But the research of S.Gartiser etc. finds, PVA is at degradation rate after 77 days anaerobic treatment 0%～12%.Liu
Rongrong etc. utilize HABR device to process the desized wastewater containing PVA, and under optimum condition, PVA clearance also only has 18%.
1936, Nord FF was found that the microorganism Fusarium lini of the first PVA that can degrade.1973,
SuzukiT etc. are found that again and can belong to antibacterial by the Pseudomonas with PVA as sole carbon source.Hereafter, PVA is as few in number
One of several polymer substances that can be biodegradable, its Study on degradation is increasingly paid close attention to by people, in succession finds
Other microorganisms of degradable PVA many, they include Pseudomonas, Alcaligenes and Bacillus etc..Can
The microorganism of degraded PVA, is because them and contains PVA digestive enzyme.Li Xu etc. summarize the degraded effect of these PVA degrading microorganisms
Rate, the degradation rate of major part PVA degrading microorganism, when PVA concentration 0.1%～0.5%, can be dropped in 3～12d
Solve more than 90%.
Visible, in natural environment, and have no lack of the microorganism to PVA efficient degradation, simply processed in actual waste water
(such as dyeing waste water) in journey, because of the interference of other pollutant, it is impossible to steady removal rate, it is impossible to ensure that water outlet PVA concentration is stable, study carefully
Its reason, the microbial bacteria group structure being also because system is poor, and PVA efficient degrading bacteria can not be effectively enriched with, it is impossible to
Give full play to its potentiality.In conjunction with above-mentioned dyeing waste water anaerobic treatment feature, it is necessary to improve processing Technology, make
PVA efficient degrading bacteria is enriched with, to adapt to the process of high concentration PVA dyeing waste water.
Chinese invention patent, publication number: 103740621A, publication date: 2014-04-23, disclose a strain degradable PVA
Acinetobacter calcoaceticus bacterial strain, named acinetobacter calcoaceticus Acinetobactersp.TD33, be preserved in China on October 13rd, 2013
Type Tissue Collection, deposit number is CCTCCNO:M2013469, and fermented optimization is produced PVA degradation enzyme vigor and reached
0.87U/ml.This bacterial strain is to screen to obtain from activated sludge, has the effect of degraded PVA1799.This bacterial strain energy efficient degradation
PVA1799 contaminant component in culture medium and desizing sewage.May be used for preparing the industry cotton desized wastewaters such as weaving to process
Microorganism desizing microbial inoculum, it is possible to effectively remove pollutant PVA1799, not only can decrease environmental pollution but also can reduce at sewage
Reason cost.But the method is relates to for actual dye-printing desizing waste water PVA treatment effect, adaptability and processing cost, difficult
With solving practical problems.
Chinese invention patent, publication number: 101531417, publication date: 2009-09-16, disclose a kind of organic and inorganic compound
Close flocculant, its preparation method and for processing the purposes of high-concentration dye-printing desizing waste water, relate to a kind of organo-mineral complexing
Flocculant, this invention flocculant has use, and pH value range is wide, concentration is high, sedimentation velocity is fast, the advantage such as easy to use, and it is not enough
Part is, succeeding level-two biochemical treatment impact is big.Chinese invention patent, publication number: 102757144A, publication date: 2012-
10-31, optical electrical Fenton disclosing a kind of polyvinyl alcohol desized wastewater processes technique, relates to a kind of polyvinyl alcohol waste water
Optical electrical Fenton processes technique.Chinese invention patent, publication number: 105174548A, publication date: 2015-12-23, disclose one
Planting the processing method containing PVA desized wastewater, this invention processes containing PVA weaving desized wastewater, and operating procedure simply, removes PVA speed
Rate is fast, and PVA clearance is high, but the method adds Borax, and operating cost is high.Chinese invention patent, publication number: 103755050A,
Publication date: 2014-04-30, discloses a kind of desized wastewater membrane method treating process, relates to desized wastewater membrane method treating process, belong to
In water treatment field.The described technique of this invention can carry out reuse to the desized wastewater containing alkali and refining agent and dispersant,
Not only reuse water therein also achieves the reuse of alkali, refining agent and dispersant.But it is big that the method uses film to process investment, run
Cost is high, needs to clean, and there is dense water secondary pollution problem.
In sum, prior art is disadvantageous in that: the process sides such as (1) Fenton method, Coagulation Method, membrane method treating process
It is big to there is investment in method, and operating cost is high, the shortcoming that operation management is complicated.(2) traditional dyeing and finishing desized wastewater PVA biological treatment effect
Poor stability, PVA removal efficiency is the highest, be difficult to form the problems such as single-minded PVA dominant microflora.
Chinese invention patent, publication number: 103819050A, publication date: 2014-05-28, disclose a kind of high concentration and contain
The treating method and apparatus of PVA desized wastewater, including wastewater equalization pond, coagulative precipitation tank, pond of saltouing, advanced oxidation reaction precipitation
Pond, iris type anoxia anaerobic reation pool, Aerobic Pond and second pond；Coagulative precipitation tank, saltout pond and advanced oxidation reaction settling basin
Including mix and blend district and settling zone, iris type anoxia anaerobic reation pool includes double oxygen section, the anoxia being separated into by flow-stopping plate
Section and anaerobism section；Waste water is adjusted pond regulating pondage and pH value, subsequently into coagulative precipitation tank and coagulant hybrid reaction, enters
Pond of saltouing carries out reaction of saltouing, and the oxidized decomposition of pollutant in advanced oxidation reaction settling basin enters back into iris type anoxia and detests
Oxygen reaction tank, Aerobic Pond carry out anoxia, anaerobic and aerobic reaction, qualified discharge after precipitation；Present configuration is simple, is manufactured into
This is relatively low, has extraordinary treatment effect.It is disadvantageous in that, the method uses the method for materialization, and investment is big, work
Skill step is complicated, adds reagent cost high, and mud generation amount is big and adding of agent system and to measure system operation management complicated.
Summary of the invention
1, the technical problem to be solved in the present invention
Processing for dye-printing desizing waste water PVA in prior art and there is the problem that investment is big, the present invention proposes a kind of strong
Change the device of biodegradation pretreatment dye-printing desizing waste water PVA.Its investment is little, PVA is carried out enhancing degradation, improves PVA and go
Except efficiency.
2, technical scheme
The purpose of the present invention is achieved through the following technical solutions.
The device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA, including anaerobic UASB pond, mixed zone, detests
Oxygen hydrolysis UASB pond and stable region, wherein, anaerobic UASB pond, mixed zone, anaerobic hydrolysis UASB device and stable region are sequentially connected with, surely
The water outlet determining district enters after-treatment, and the water side of anaerobic hydrolysis UASB device is connected with water inlet end.
Preferably, anaerobic UASB pond includes anaerobic UASB pond I and anaerobic UASB pond II, and dye-printing desizing waste water PVA is same respectively
Time flow into anaerobic UASB pond I and the entrance of anaerobic UASB pond II, the outlet of anaerobic UASB pond I and anaerobic UASB pond II all with mix
The entrance in district connects.
Preferably, it is provided with granule sludge in anaerobic UASB pond.
Preferably, the water side in anaerobic UASB pond is connected with water inlet end.
Preferably, it is provided with floc sludge in anaerobic hydrolysis UASB reactor.
A kind of method of enhanced biodegradation pretreatment dye-printing desizing waste water PVA, the steps include:
A, pending dye-printing desizing waste water flow in anaerobic UASB pond I in parallel and anaerobic UASB pond II；Anaerobic UASB
Granule sludge in pond I and anaerobic UASB pond II processes PVA hardly degraded organic substance, improves B/C ratio, improves waste water carbon source quality；
B, a part of waste water are from the entrance mixed zone, water side of anaerobic UASB pond I and anaerobic UASB pond II；Another part gives up
Water is back to water inlet end from the water side of anaerobic UASB pond I and anaerobic UASB pond II, and reflux ratio is 25～40%；According to water inlet end
Middle PVA concentration level determines reflux ratio, if water inlet PVA concentration is the highest, reflux ratio value is the biggest；
C, mixed zone arrange agitator so that two bursts of water outlets of anaerobic UASB pond I and anaerobic UASB pond II are mixed in mixed zone
Close uniformly；
The mixing gravity flow of D, mixed zone waste water enters anaerobic hydrolysis UASB reactor；Anaerobic hydrolysis UASB reactor is provided with wadding
Shape mud, floc sludge carries out domestication and the enrichment of PVA specially good effect degradation bacteria in anaerobic hydrolysis UASB reactor, and enhanced biological drops
Solve Dying Wastewater Treatment & thing PVA；
E, a part of water outlet of anaerobic hydrolysis UASB reactor enter stable region, and another part effluent recycling is to anaerobic hydrolysis
The water inlet end of UASB reactor, reflux ratio is 15～20%；Reflux ratio is determined, if entered according to PVA concentration level in water inlet end
Water PVA concentration is the highest, and reflux ratio value is the biggest；
F, stable region water outlet carry out two stage treatment.
Preferably, in the device of described a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA, dye-printing desizing gives up
Water water temperature 30 DEG C～40 DEG C, ρ (PVA)/COD " concentration coefficient " about 0.04, it is beneficial to anaerobe at a temperature of this in mesophilic digestion condition
Under enrichment.
Preferably, anaerobic UASB pond I and the II parallel running of anaerobic UASB pond, when actual amount of water is less than the design water yield 60%
Time, only run one of which, another set proceeds microorganism regulation and control.
Preferably, the MLSS concentration of granule sludge is 3400～3600mg/L, and kind mud is black, and average particle size range is: 1
～3mm.Use this kind of granule sludge to carry out processing the Organic substance being readily biodegradable, by ρ (PVA)/COD " concentration coefficient " from
0.042 rises to 0.075, water outlet PVA concentration 150～180mg/L, COD concentration 1600～2300mg/L, improves waste water carbon source matter
Amount, B/C ratio is promoted to 0.25～0.35.
Preferably, the MLSS concentration of floc sludge is 2100～2300mg/L, and average particle size range is: 0.15～
0.35mm。
Dye-printing desizing waste water PVA is degraded by this process strengthening microorganism, has strong adaptability, high (the PVA removal of removal efficiency
Rate >=90%, COD clearance >=75%), biodegradability improve the feature of (B/C improves >=0.16), accordingly, it is capable to consume low, throw
Money and operating cost are low, simple to operate, capacity of resisting impact load is strong.Additionally, by enhancement microbiological Degradation, significantly cut down
Toxic pollutant (such as azo dye and metabolite aromatic amine compound etc.), reduces the environmental risk of discharge of wastewater.
3, beneficial effect
Compared to prior art, it is an advantage of the current invention that:
(1) overcome Fenton and process the investment of the materilization freatment methods such as technique, Coagulation Method, embrane method process greatly, run into
This height, the shortcoming that operation management is complicated, it is provided that a kind of enhanced biological processes the method for dye-printing desizing waste water PVA, has energy consumption
Low, investment and operating cost are low, simple to operate, capacity of resisting impact load is strong；Additionally, by enhancement microbiological Degradation, aobvious
Write and cut down toxic pollutant (such as azo dye and metabolite aromatic amine compound etc.), reduce the environmental risk of discharge of wastewater；
(2) overcome traditional dyeing and finishing desized wastewater PVA biological treatment effect poor stability, PVA removal efficiency is the highest, be difficult to
Form the shortcomings such as single-minded PVA dominant microflora；Use anaerobic UASB reactor reduction hardly degraded organic substance, improving waste water can be biochemical
Property and anaerobic hydrolysis UASB reactor form obligate microbial bacteria group structure, be enriched with PVA specially good effect degradation flora, thus to PVA
Carry out enhancing degradation, improve PVA removal efficiency；Dye-printing desizing waste water PVA is degraded by this process strengthening microorganism, has adaptability
By force, removal efficiency high (PVA clearance >=90%, COD clearance >=75%), biodegradability improve (B/C improves >=0.16)
Feature；
(3) for dye-printing desizing waste water have PVA concentration high (PVA concentration≤210mg/L), biological degradability poor (B/C≤
0.09), organic concentration high (COD≤5000mg/L), the feature of alkalescence high (pH value 7-9), use enhanced biodegradation technique,
Form obligate microbial bacteria group structure, be enriched with PVA specially good effect degradation flora, thus PVA is carried out enhancing degradation, improve PVA and go
Except efficiency；The investment overcoming the materilization freatment methods such as Fenton method, Coagulation Method, membrane method treating process is big, and operating cost is high, behaviour
The shortcoming making complex management；
(4) for traditional dyeing and finishing desized wastewater PVA biological treatment effect poor stability, PVA removal efficiency is the highest, be difficult to shape
Become the problems such as single-minded PVA dominant microflora, use anaerobic UASB reactor to reduce hardly degraded organic substance, improve wastewater biodegradability
Form obligate microbial bacteria group structure with anaerobic hydrolysis UASB reactor, be enriched with PVA specially good effect degradation flora, thus PVA is entered
Row enhancing degradation, improves PVA removal efficiency；In addition carried by the backflow of anaerobic UASB reactor and anaerobic hydrolysis UASB reactor
The adaptability of high biological treatment, removal efficiency and biodegradability are improved；
(5) present invention uses biochemical method, makes full use of anaerobism and the hydrolysis obligate bacterium Degradation to pollutant, processes
Effective, investment and operating cost is low, mud generation amount is few.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the method for the present invention.
Detailed description of the invention
It is further described technical scheme below in conjunction with embodiment and accompanying drawing.
In conjunction with Fig. 1, the device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA, including anaerobic UASB pond, mix
Closing district, anaerobic hydrolysis UASB pond and stable region, wherein, anaerobic UASB pond, mixed zone, anaerobic hydrolysis UASB device and stable region are successively
Connecting, the water outlet of stable region enters after-treatment, and the water side of anaerobic hydrolysis UASB device is connected with water inlet end.Anaerobic UASB Chi Bao
Including anaerobic UASB pond I and anaerobic UASB pond II, dye-printing desizing waste water PVA flows simultaneously into anaerobic UASB pond I and anaerobic UASB respectively
The outlet of the entrance of pond II, anaerobic UASB pond I and anaerobic UASB pond II is all connected with the entrance of mixed zone；Anaerobic UASB pond I and
It is equipped with granule sludge in the II of anaerobic UASB pond；The water side of anaerobic UASB pond I and anaerobic UASB pond II is all connected with water inlet end；
It is provided with floc sludge in anaerobic hydrolysis UASB reactor.
A kind of method of enhanced biodegradation pretreatment dye-printing desizing waste water PVA, the steps include:
A, pending dye-printing desizing waste water have PVA concentration high (PVA concentration≤210mg/L), the poor (B/ of biological degradability
C≤0.09), organic concentration high (COD≤5000mg/L), the feature of alkalescence high (pH value 7-9), described a kind of enhanced biological
Dye-printing desizing waste water water temperature 30 DEG C～40 DEG C in the device of degraded pretreatment dye-printing desizing waste water PVA, ρ (PVA)/COD " enrichment system
Number " about 0.04, flow in anaerobic UASB pond I in parallel and anaerobic UASB pond II；In anaerobic UASB pond I and anaerobic UASB pond II
Granule sludge processes PVA hardly degraded organic substance, improves B/C ratio, improves waste water carbon source quality；
The upflow velocity of anaerobic UASB pond I and anaerobic UASB pond II is 0.8～1.2m/h, and hydraulic detention time is 25
～35h, volumetric loading is 0.25～0.35kg/ (m3 d), is so beneficial to retain the preferable mud of settling property, thus
Keep the sludge concentration that concentration is higher, improve reactor for treatment effect.
The MLSS concentration of granule sludge is 3400～3600mg/L, and kind mud is black, and average particle size range is: 1～3mm,
Compared to anaerobism flco mud, this granule sludge is adaptable to various waste water, and flocculation is preferable with settling property；Compared to general
Logical granule sludge, this type of mud is based on thread methane phase bacillus, as microbe carrier, more sharp and microorganism and Organic substance
Be sufficiently mixed, thus be prone to degradation of organic substances.This kind of granule sludge is used in anaerobic UASB pond, ρ (PVA)/COD is " rich
Collection coefficient " rise to 0.075 from 0.042, water outlet PVA concentration 150～180mg/L, COD concentration 1600～2300mg/L, improves
Wastewater carbon source quality, B/C ratio is promoted to 0.25～0.35.
B, a part of waste water are from the entrance mixed zone, water side of anaerobic UASB pond I and anaerobic UASB pond II；Another part gives up
Water is back to water inlet end from the water side of anaerobic UASB pond I and anaerobic UASB pond II, and reflux ratio is 25～40%；According to water inlet end
Middle PVA concentration level determines reflux ratio, if water inlet PVA concentration is the highest, reflux ratio value is the biggest；
On the one hand in order to ensure that whole processing system can continue to run with, the opposing party when one group of anaerobic UASB goes wrong
Face is to adapt to water quality and quantity change, considering installation cost, use two groups of anaerobic UASB ponds, it is achieved the high sexual valence of device
Ratio, improves device treatment effeciency.Anaerobic grain anaerobic UASB pond I and the II parallel running of anaerobic UASB pond, when actual amount of water is less than
During the design water yield 60%, only running one of which, another set proceeds microorganism regulation and control, microorganism regulation and control mainly supply
UASB pond Organic substance and PVA keep microbial activity in reaction tank, it is to avoid the death of microorganism.
C, mixed zone arrange agitator so that two bursts of water outlets of anaerobic UASB pond I and anaerobic UASB pond II are mixed in mixed zone
Close uniformly；
The mixing gravity flow of D, mixed zone waste water enters anaerobic hydrolysis UASB reactor；Anaerobic hydrolysis UASB reactor is provided with wadding
Shape mud, floc sludge carries out domestication and the enrichment of PVA specially good effect degradation bacteria in anaerobic hydrolysis UASB reactor, and enhanced biological drops
Solve Dying Wastewater Treatment & thing PVA；
Concrete domestication with enriching step is: digested sludge (i.e. floc sludge) is seeded in anaerobic hydrolysis UASB reactor
In, the PVA adding the degree of polymerization about 500 in reactor cultivates as additional carbon, controls dissolved oxygen 0.2～0.3mg/L,
Temperature 30～35 DEG C, cultivate 3d, then gradually decrease carbon source amount, and gradually add mixed zone inflow, until mixed zone
Water inlet substitutes carbon source amount completely；The degree of polymerization about 500 PVA additional carbon is used mainly to improve PVA degradation enzyme activity, this
Sample has promoted for the desized wastewater degradation capability containing more high polymerization degree PVA.
The upflow velocity of anaerobic hydrolysis UASB reactor is 0.6～0.8m/h, and hydraulic detention time is 12.5～15h, holds
Long-pending load is 0.15～0.25kg/ (m3D), floc sludge so can be avoided to flow out with current, it is ensured that higher cotton-shaped dirt
Mud amount.
The MLSS concentration of floc sludge is 2100～2300mg/L, and average particle size range is: 0.15～0.35mm, and this is cotton-shaped
The absorbability of mud, settling property, mass transfer ability and Biomass can keep preferable level, the microorganism in floc sludge
Of a great variety, be conducive to carrying out the cultivation of PVA specially good effect degradation bacteria.
In anaerobic hydrolysis UASB reactor, carry out domestication and the enrichment of PVA specially good effect degradation bacteria, mainly have Streptococcus, copper
Green pseudomonas, Micrococcus, Lactobacillus etc., each of which has PVA digestive enzyme, oxidase or dehydrogenase etc., mixed
Closing under fungus strain synergism, can play best PVA degradation efficiency, total removal rate reaches more than 90%.
E, a part of water outlet of anaerobic hydrolysis UASB reactor enter stable region, and another part effluent recycling is to anaerobic hydrolysis
The water inlet end of UASB reactor, reflux ratio is 15～20%；Reflux ratio is determined, if entered according to PVA concentration level in water inlet end
Water PVA concentration is the highest, and reflux ratio value is the biggest；
F, due to anaerobic hydrolysis UASB reactor water outlet may be with floc sludge, so arranging stable region to carry out place of settling
Reason, stable region is set to second pond, it is ensured that stable region goes out clarification of water, anaerobic hydrolysis stable region (i.e. stable region in Fig. 1) water outlet
Carrying out two stage treatment, stable region water outlet processes to PVA≤20mg/L, B/C >=0.25, COD≤1000mg/L, pH value 7-9.
Embodiment 1
In conjunction with Fig. 1, certain printing and dyeing enterprise waste water is divided into pre-treatment waste water and dyeing waste-water, pre-treatment waste water mainly by desizing,
The waste water composition that kiering, rinsing produce, dyeing waste-water is mainly made up of dyeing, stamp and jean wastewater.
Device in the present embodiment is with embodiment 1, the side of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA
Method,
In step A, pending dye-printing desizing PVA concentration of giving up is 194mg/L, biological degradability poor (B/C is 0.09), has
Machine substrate concentration high (COD=4680mg/L), pH value are 7, and the water temperature of dye-printing desizing waste water is 30 DEG C, ρ (PVA)/COD " enrichment system
Number " about 0.04；
The upflow velocity of anaerobic UASB pond I and anaerobic UASB pond II is 0.8m/h, and hydraulic detention time is 25h, holds
Long-pending load is 0.25kg/ (m3D),
The MLSS concentration of granule sludge is 3400mg/L, and kind mud is black, and mean diameter is: 1mm.Use this kind of granule dirt
Mud carries out processing the Organic substance being readily biodegradable, and from 0.042, ρ (PVA)/COD " concentration coefficient " is risen to 0.075, water outlet
PVA concentration 150mg/L, COD concentration 1600mg/L, improve wastewater carbon source quality, B/C ratio is promoted to 0.25.
In step B, waste water is back to water inlet end from the water side of anaerobic UASB pond I and anaerobic UASB pond II, and reflux ratio is
25%；Anaerobic UASB pond I and the II parallel running of anaerobic UASB pond, when actual amount of water is less than the design water yield 60%, only run it
In one group, another set proceed microorganism regulation and control.
In step C, the upflow velocity of anaerobic hydrolysis UASB reactor is 0.8m/h, and hydraulic detention time is 12.5h, volume
Load is 0.15kg/ (m3D),
The MLSS concentration of floc sludge is 2100mg/L, and mean diameter is: 0.15mm.
Domestication and the richness of PVA specially good effect degradation bacteria (predominantly Bacillus) is carried out in anaerobic hydrolysis UASB reactor
Collection so that PVA total removal rate reaches 90.7%.
In step D, the water inlet end of effluent recycling to anaerobic hydrolysis UASB reactor, reflux ratio is 15%；
In step E, stable region water outlet carries out two stage treatment.Stable region water outlet processes to PVA≤20mg/L, B/C >=0.25,
COD≤1000mg/L, pH value 7-9, PVA total removal rate 90.7%, COD total removal rate 79.4%.Other parts are with embodiment 1.
Embodiment 2
Certain printing and dyeing enterprise waste water is divided into pre-treatment waste water and dyeing waste-water, and pre-treatment waste water is mainly by desizing, kiering, rinsing
The waste water composition produced, dyeing waste-water is mainly made up of dyeing, stamp and jean wastewater.
Device in the present embodiment is with embodiment 1, the side of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA
Method, similar to Example 1, difference is:
In step A, pending dye-printing desizing waste water has PVA concentration high (PVA concentration is 208mg/L), biodegradation
Property poor (B/C=0.09), organic concentration high (COD=4970mg/L), the feature of alkalescence high (pH=9), dye-printing desizing waste water
Water temperature 40 DEG C, ρ (PVA)/COD " concentration coefficient " about 0.04；
The upflow velocity of anaerobic UASB pond I and anaerobic UASB pond II is 1.2m/h, and hydraulic detention time is 35h, holds
Long-pending load is 0.35kg/ (m3D),
The MLSS concentration of granule sludge is 3600mg/L, and kind mud is black, and mean diameter is: 3mm.Use this kind of granule dirt
Mud carries out processing the Organic substance being readily biodegradable, and from 0.042, ρ (PVA)/COD " concentration coefficient " is risen to 0.075, water outlet
PVA concentration 180mg/L, COD concentration 12300mg/L, improve wastewater carbon source quality, B/C ratio is promoted to 0.35.
In step B, waste water is back to water inlet end from the water side of anaerobic UASB pond I and anaerobic UASB pond II, and reflux ratio is
40%；Anaerobic UASB pond I and the II parallel running of anaerobic UASB pond, when actual amount of water is less than the design water yield 60%, only run it
In one group, another set proceed microorganism regulation and control.
In step C, the upflow velocity of anaerobic hydrolysis UASB reactor is 1.2m/h, and hydraulic detention time is 15h, and volume is born
Lotus is 0.25kg/ (m3D),
The MLSS concentration of floc sludge is 2300mg/L, and mean diameter is: 0.35mm.
Domestication and the richness of PVA specially good effect degradation bacteria (predominantly Bacillus) is carried out in anaerobic hydrolysis UASB reactor
Collection so that PVA total removal rate reaches more than 90%.
In step D, the water inlet end of effluent recycling to anaerobic hydrolysis UASB reactor, reflux ratio is 20%；
In step E, stable region water outlet carries out two stage treatment.Stable region water outlet processes to PVA=17mg/L, B/C >=0.25,
COD=963mg/L, pH value 7-9, PVA total removal rate 91.8%, COD total removal rate 80.6%, other parts are with embodiment 1, respectively
Workshop section's pollutant removal situation is shown in Table 1.
Table 1 each workshop section pollutant removal situation
Embodiment 3
Certain printing and dyeing enterprise waste water is divided into pre-treatment waste water and dyeing waste-water, and pre-treatment waste water is mainly by desizing, kiering, rinsing
The waste water composition produced, dyeing waste-water is mainly made up of dyeing, stamp and jean wastewater.
Device in the present embodiment is with embodiment 1, the side of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA
Method, similar to Example 1, difference is:
In step A, pending dye-printing desizing waste water has PVA concentration high (PVA concentration=210mg/L), biodegradation
Property poor (B/C=0.087), organic concentration high (COD=5000mg/L), the feature of alkalescence high (pH value is 8), dye-printing desizing gives up
Water water temperature 35 DEG C, ρ (PVA)/COD " concentration coefficient " about 0.04；
The upflow velocity of anaerobic UASB pond I and anaerobic UASB pond II is 1.0m/h, and hydraulic detention time is 30h, holds
Long-pending load is 0.3kg/ (m3D),
The MLSS concentration of granule sludge is 3500mg/L, and kind mud is black, and mean diameter is: 2mm.Use this kind of granule dirt
Mud carries out processing the Organic substance being readily biodegradable, and from 0.042, ρ (PVA)/COD " concentration coefficient " is risen to 0.075, water outlet
PVA concentration 170mg/L, COD concentration 2000mg/L, improve wastewater carbon source quality, B/C ratio is promoted to 0.3.
In step B, waste water is back to water inlet end from the water side of anaerobic UASB pond I and anaerobic UASB pond II, and reflux ratio is
35%；Anaerobic UASB pond I and the II parallel running of anaerobic UASB pond, when actual amount of water is less than the design water yield 60%, only run it
In one group, another set proceed microorganism regulation and control.
In step C, the upflow velocity of anaerobic hydrolysis UASB reactor is 1.0m/h, and hydraulic detention time is 13h, and volume is born
Lotus is 0.2kg/ (m3D),
The MLSS concentration of floc sludge is 2200mg/L, and mean diameter is: 0.3mm.
Domestication and the richness of PVA specially good effect degradation bacteria (predominantly Bacillus) is carried out in anaerobic hydrolysis UASB reactor
Collection so that PVA total removal rate reaches more than 90%.
In step D, the water inlet end of effluent recycling to anaerobic hydrolysis UASB reactor, reflux ratio is 19%；
In step E, stable region water outlet carries out two stage treatment.Stable region water outlet processes to PVA≤20mg/L, B/C >=0.25,
COD≤1000mg/L, pH value 7-9, PVA total removal rate 92%, COD total removal rate 75.6%, other parts are with embodiment 1.
Claims (5)
1. the device of an enhanced biodegradation pretreatment dye-printing desizing waste water PVA, it is characterised in that include anaerobic UASB pond,
Mixed zone, anaerobic hydrolysis UASB pond and stable region, wherein, anaerobic UASB pond, mixed zone, anaerobic hydrolysis UASB device and stable region depend on
Secondary connection, the water outlet of stable region enters after-treatment, and the water side of anaerobic hydrolysis UASB device is connected with water inlet end.
The device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA the most according to claim 1, its feature exists
In, anaerobic UASB pond includes anaerobic UASB pond I and anaerobic UASB pond II, and dye-printing desizing waste water PVA flows simultaneously into anaerobism respectively
The outlet of UASB pond I and the entrance of anaerobic UASB pond II, anaerobic UASB pond I and anaerobic UASB pond II all with the entrance of mixed zone company
Connect.
The device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA the most according to claim 1, its feature exists
In, anaerobic UASB is provided with granule sludge in pond.
The device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA the most according to claim 3, its feature exists
In, the water side in anaerobic UASB pond is connected with water inlet end.
The device of a kind of enhanced biodegradation pretreatment dye-printing desizing waste water PVA the most according to claim 3, its feature exists
In, it is provided with floc sludge in anaerobic hydrolysis UASB reactor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776777A (en) * | 2016-05-16 | 2016-07-20 | 江苏省环境科学研究院 | Device and method for pre-treating PVA in printing and dyeing wastewater from desizing through enhanced biodegradation |
| CN106362773A (en) * | 2016-08-26 | 2017-02-01 | 江南大学 | Novel degradation method for polyvinyl alcohol fibers |
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2016
- 2016-05-16 CN CN201620442857.3U patent/CN205603431U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776777A (en) * | 2016-05-16 | 2016-07-20 | 江苏省环境科学研究院 | Device and method for pre-treating PVA in printing and dyeing wastewater from desizing through enhanced biodegradation |
| CN105776777B (en) * | 2016-05-16 | 2018-08-24 | 江苏省环境科学研究院 | A kind of device and method of enhanced biodegradation pretreatment dye-printing desizing waste water PVA |
| CN106362773A (en) * | 2016-08-26 | 2017-02-01 | 江南大学 | Novel degradation method for polyvinyl alcohol fibers |
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