CN106315977B - A kind of printing-dyeing waste water treatment process - Google Patents

A kind of printing-dyeing waste water treatment process Download PDF

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CN106315977B
CN106315977B CN201610817230.6A CN201610817230A CN106315977B CN 106315977 B CN106315977 B CN 106315977B CN 201610817230 A CN201610817230 A CN 201610817230A CN 106315977 B CN106315977 B CN 106315977B
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water
pond
waste water
supernatant
sludge
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CN106315977A (en
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王力民
罗维新
李春光
贾红斌
孙国庆
李志海
吕建品
周勇
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HUAFANG CO Ltd
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HUAFANG CO Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
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  • Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract

The present invention relates to a kind of printing-dyeing waste water treatment process, step includes desized wastewater first into conditioning tank, is then promoted to anaerobic reactor through pump, and supernatant flow to adjusting sedimentation basin certainly after desized wastewater is handled in anaerobic reactor；Comprehensive wastewater enters through pipeline adjusts sedimentation basin precipitating, and supernatant is promoted to anaerobic reation pool through pump, and after anaerobic reation pool is handled, waste water flow to the pond A/O through a sedimentation basin, supernatant certainly；Waste water enters secondary settling tank through the pond A/O, micro-electrolysis reactor is equipped in the water outlet of secondary settling tank, treated waste water enters dosing pond, enter three heavy ponds through dosing pond, the sludge in three heavy ponds, which is sent into, adjusts sedimentation basin, and supernatant enters the integrated pond XHOC, then waste water final deposition pool, supernatant passes through oxidation pond, and into sandfiltration pot, the processing water through sandfiltration pot outflow is the discharge water of standard.Low energy consumption by the present invention, and high-efficient, stable effluent quality is easy to operate suitable for the processing of various concentration organic pollutants, and operation is convenient.

Description

A kind of printing-dyeing waste water treatment process
Technical field
A kind of printing-dyeing waste water treatment process, belongs to technical field of sewage.
Background technique
Dyeing waste water is the waste water of printing and dyeing mill's discharge based on processing cotton, fiber crops, chemical fibre and its blending product.Printing and dyeing are useless Water water is larger, 1 ton of every dyeing and printing process, 100~200 tons of textile water consumption, wherein 80~90% become waste water.Textile printing and dyeing is useless Water has the characteristics that water is big, organic pollutant content is high, alkalinity is big, change of water quality is big, belongs to one of intractable industrial wastewater, Contain dyestuff, slurry, auxiliary agent, finish, soda acid, fiber impurity, sand substance, inorganic salts etc. in waste water.
It is basicity that dyeing waste water, which is mainly dealt with objects, and easily biological-degradable or production degradation speed be not extremely slow organic Matter, coloring matter and noxious material.In the U.S., dyeing and printing sewage majority uses two stage treatment, i.e., at materialized pretreatment and biochemistry The process route that condition combines is managed, individual enterprises have used tertiary treatment system, i.e., increase active carbon after biochemical treatment and inhale Attached processing.The treatment process and the U.S. that the textile printing and dyeing enterprises of Japan use are similar, but more one the case where application ozonation treatment A bit.In China, handles dyeing waste water and also mainly use materializing strategy in conjunction with second level particularization treatment process, wherein materializing strategy It is most of to use activity dirt based on coagulating sedimentation and coagulation air-float, and in the biochemical treatment facility that operation has been put into Mud method.However, in the prior art, easily there is dead angle and short flow phenomenon, and energy consumption height is handled, effluent quality is unstable.
Summary of the invention
The purpose of the present invention is to provide a kind of printing-dyeing waste water treatment process, treatment of dyeing wastewater uses separation of cloudy and clear, single The mode for reason of staying alone.Desized wastewater is the highest waste water of pollutant concentration generated in printing and dyeing production process.Technology of the invention Scheme is as follows:
A kind of printing-dyeing waste water treatment process, the specific steps are as follows:
(1) desized wastewater adds acid for adjusting pH first into conditioning tank, so that pH is promoted to anaerobic reaction between 6-8, through pump Organic matter in waste water is converted to methane, carbon dioxide and water, while dropping difficult in waste water under the action of anaerobic bacteria by device The larger molecular organics open loop scission of link of solution, becomes small organic molecule, and then supernatant flow to adjusting sedimentation basin certainly；
(2) other comprehensive wastewaters in addition to desized wastewater enter adjusting precipitating after pipeline is collected with the desizing water after anaerobism Chi Hou, precipitates 8h, and supernatant is promoted to anaerobic reation pool through pump, in the effect of anaerobic bacteria, destroys chromophoric group and the production of dyestuff The substances such as raw methane reduce the organic concentration in waste water, and then waste water is through a sedimentation basin, precipitate 10h, after mud-water separation, on Clear liquid flow to the pond A/O certainly, under the action of aerobic bacteria and nitrification, denitrifying bacterium, thorough degradation of organic substances and ammonia nitrogen；
(3) waste water enters secondary settling tank through the pond A/O, through organic matter still difficult to degrade containing part in A/O treated waste water, After precipitating 10h in secondary settling tank, the sludge in secondary settling tank is sent into the pond A/O, and excess sludge is sent into conditioning tank；
(4) it is equipped with micro-electrolysis reactor in the water outlet of secondary settling tank, carbon micro-electrolysis is used to carry out deeply as filler to sewage Degree processing, is added hydrogen peroxide behind for the iron carbon pond in electrolysis reactor, utilizes the ferrous iron and dioxygen generated in the reaction of iron carbon Water combines, and further strengthens wastewater treatment；
(5) waste water by step (4) processing enters dosing pond, and medicament is Fenton reagent, additive amount 0.02- 0.05kg/m3, waste water through dosing pond enter three heavy ponds, in three heavy ponds under the adjustment effect of alkali, carry out mixed precipitation 10h, three Sludge in heavy pond, which is sent into, adjusts sedimentation basin, and supernatant enters the integrated pond XHOC, the supernatant after the processing of the integrated pond XHOC Liquid enters final deposition pool, and for precipitating after 10 hours, supernatant passes through oxidation pond, and into sandfiltration pot, the processing water flowed out through sandfiltration pot is The discharge water of standard, the backwashing water of sandfiltration pot, which is sent into, to be adjusted in sedimentation basin.Preferably, the additive amount of Fenton reagent is 0.035kg/m3。
It further, is the active carbon of recycling in the integration of the invention pond XHOC, active carbon uses pneumatic diaphragm pump Circulation gets to diaphragm type plate and frame filter press out of XHOC pond, after being dehydrated, is regenerated, and reuses.
The present invention is based on biochemical treatment, and therefore, the yield of sludge is few, and the sludge that whole processing technology generates is sent into dirty It in mud thickener, is dehydrated through dewaterer, dewatered sludge is burned, secondary pollution is not generated；Sludge concentration tank it is upper The water deviate from clear liquid and dewaterer is sent into adjust and be handled in sedimentation basin.
The characteristics of printing-dyeing waste water treatment process of the present invention:
(1) desizing water has complicated component, pollutant concentration is high, coloration as part most intractable in dyeing waste water Feature deep, alkalinity is strong.Desizing water is subjected to Anaerobic Treatment first in treatment process of the present invention, treatment effect is stablized, COD removal Rate reaches 85% or more in 60% or more, PVA removal rate, and biodegradability is increased to 0.5 by 0.1, and the biogas of generation realizes resource Change and utilize, and the removal rate of subsequent aerobic biochemical is made to be increased to 85% by 65%, performance is stably reached to whole system Important role.
(2) waste water of the desized wastewater after Anaerobic Treatment and low concentration is overregulated sedimentation basin precipitating and anaerobic reation pool Dye molecule open loop scission of link in waste water is destroyed color development group by the effect of anaerobic bacteria by processing.
(3) aerobic biochemical system uses A/O technique.It is equipped with internal circulation system in the pond A/O, ensures the nitrification of biology and anti- Nitrification function, it is ensured that Nitrogen removal effect.A/O nitration denitrification system is made of anoxic section with aerobic section, has biological denitrificaion Function.Anoxic pond is under anoxic conditions, to be flowed back by mixed liquor, using the organic matter in raw wastewater as the carbon of denitrifying bacteria Source makes the NO in waste water2 -、NO3 -It is reduced into N2Have the function that denitrogenation, ammonia-nitrogen content obtains while removing organic matter in this way Effectively degradation.
It is equipped with micro- exposure device in anoxic pond, controls dissolved oxygen < 0.5mg/L.
Anoxic pond water outlet gravity flow enters aerobic tank and carries out nitration reaction, and a large amount of organic matter is removed herein, ammonia nitrogen Removal is concentrated mainly on anaerobic-aerobic section, and the removal process of ammonia nitrogen is as follows:
NH4 ++1.5O2→NO2 -+2H++H2O (a)
NO2-+0.5O2→NO3 - (b)
6NO3 -+2CH3OH→6NO2 -+2CO2+4H2O (c)
6NO2 -+3CH3OH→3N2+3CO2+3H2O+6OH- (d)
(a) (b) is biological nitrification process, by the effect of nitrite bacteria and nitrate bacterium, is incited somebody to action under aerobic condition Ammonium oxidation at nitrite nitrogen and nitrate nitrogen process.
(c) (d) is biological denitrification process, is under anoxic conditions, by the effect of denitrifying bacterium, by NO2 ?- N and NO3 ?- N is reduced into N2Process.During biological denitrification, while oxidation operation can also be made to decompose, to reduce waste water Middle pollutant load.
Waste water is separated in secondary sedimentation tank with activated sludge after purification, upper layer Chinese effluent；After separation concentration Sludge a part returns to aeration tank (pond A/O), and to guarantee to keep certain density activated sludge in aeration tank, remaining is remaining dirty Mud, excess sludge are sent into conditioning tank.
Activated sludge is usually the velvet-like particle of yellowish-brown (sometimes in rust) wadding, also referred to as " zoogloea " or " biology wadding Solidifying body ", activated sludge has biggish specific surface area.Activated sludge is made of organic matter and inorganic matter two parts, composition ratio It is different and different because of sludge quality.Organic principle is mainly by the microorganism group that is grown in activated sludge at this in activated sludge Biocenose constitutes a metastable ecosystem and food chain slightly, wherein being with various bacteriums and protozoan Main, there is also the metazoas such as fungi, actinomyces, saccharomycete and wheel animalcule.It is also adsorbed on activated sludge processed Organic and inorganic solid material contained in waste water includes certain inert be difficult to by bacterial degradation in organic solid matter Substance.
(4) the integration pond XHOC (the inner circulation fluidized bed process of activated carbon from activated sludge)
Activated carbon from activated sludge circulating fluidized bed technique be a kind of fusion PACT, internal circulating fluidized bed and mud-water separation technology in The novel bio membrane process of one, carrier are in fluidized state in fluidized bed, make solid (biomembrane), liquid (waste water), gas It is come into full contact between (air) 3 phase, sharp impacts between particle, biofilm surface is constantly updated, and microorganism is in always Grow the vigorous stage.The technology can make the biomass that high concentration is kept in bed, and mass-transfer efficiency is high, so that the matrix of waste water be made to drop Solution speed is fast, and hydraulic detention time is short, and operating load is 10-20 times higher than general activated sludge process, and anti impulsion load ability is strong.Separately Outside, which has many advantages, such as that occupied area is small, makes it increasingly by the attention of field of water treatment.By the XHOC continuously improved Technology, has the characteristics that a series of new, is in particular in:
A, it can control the excessive growth of biofilm thickness.Since gas, liquid, solid are flowing up recycle stream between area and the area Jiang Liu Dynamic, circulation rate is very big, and carrier is but not easy to be carried over outside reactor, and under normal circumstances, cycle rate is much larger than vector terminal Settling velocity, shear action caused by fluid can efficiently control biofilm thickness, to avoid inner transmission matter caused by blocked up biomembrane Resistance increases, and biomembrane in reactor is made to keep higher activity.
B, carrier number of dropouts is few.Due in reactor turbulent fluctuation shearing and friction blocked up biomembrane can be made voluntarily to fall off, Therefore being largely lost for carrier can be prevented.
C, carrier fluidizing performance is good.The reactor realizes good carrier and shunts.Meanwhile carrier is in up-flow area and drop stream It is circulated between area, suffered friction, shearing force is essentially identical, and there is no the carrier layering in conventional three-phase fluidized bed is existing As carrier fluidisation has good uniformity, this is highly beneficial for the well growth of biomembrane.
D, the transfer efficiency of oxygen is high.Liquid circulates between upspout and drop flow tube, and circulating liquid will be in upspout Some minute bubbles carry under one's arms into drop flow tube, only portion gas from top escape, extend gas-liquid contact time, thus be oxygenated effect Rate is high.
(5) weak electrolysis mechanism introduction
1) principle
When iron filings and carbon particle are immersed in faintly acid waste water, due to the difference in Electrode Potential between iron and carbon, in waste water It will form numerous micro- primary battery.These subtle batteries are to become anode with the low iron of current potential, and the high carbon of current potential does cathode, containing Have and electrochemical reaction occurs in the aqueous solution of acidic electrolyte bath.Due to the difference in Electrode Potential between Fe and C there are 1.2V, thus meeting Countless micro cell systems is formed, constitutes an electric field in its action space, anode reaction generates a large amount of Fe2+ and enters waste water, And then it is oxidized to Fe3+, being formed has the active flocculant of higher adsorption-flocculation.Cathode reaction generate a large amount of nascent states [H] and [O], under conditions of slant acidity, with many components in waste water redox reaction can occur for these active constituents, make to have Machine macromolecular occurs chain-scission degradation and improves the biochemical of waste water to eliminate the coloration of organic matter especially dyeing waste water Property, and cathode reaction consumes a large amount of H+ and generates a large amount of OH-, this makes the pH value of waste water also increase.
2) feature
Since the wastewater pH after biochemistry is lower, close to 7, therefore, the sour cost added adjusts much lower with respect to raw water.Simultaneously With the progress of micro-electrolysis reaction, the pH of waste water can rise again, to reduce subsequent neutralization expense.
(6) principle of " Fenton processing system " and process characteristic are as follows:
FENTON process introduction
FENTON technique is using a kind of sewage treatment process of Fenton reagent exploitation, with respect to other advanced oxidation agent Speech, with operating process, simple, reactant is easy to get Fenton method, expense is cheap, is not necessarily to complex device, to subsequent biochemical treatment Do not have toxic action and it is environmentally friendly the advantages that, be gradually applied to pulping and paper-making, dyestuff, preservative, photographic developer, pesticide etc. In waste water treatment engineering, and have a good application prospect.
The oxidation mechanism of Fenton reagent
In general, the oxidability of oxidant is consistent with its standard electrode potential, and hydroxyl radical free radical (HO) compares Other common oxidants have higher standard electrode potential, also just have higher oxidability.
Photon energy on HO active group is equivalent to the thermal energy of 3327 DEG C of high temperature, is enough to make organic matter at these elevated temperatures It " burns " rapidly, and final oxygenolysis is CO2And H2O substantially reduces the COD of sewage, reaches purpose of purifying the water quality.
Fenton reagent is to pass through Fe in acid condition2+Excitation, make H2O2Generating has high oxidisability HO, oxygenolysis organic matter and reducing substances.Reaction process is as follows:
Fe2++H2O2→Fe3++HO·+HO-
Fe3++H2O2→Fe2++HOO·+H+
Fe2++HO·→Fe3++HO-
HOO·+Fe3+→Fe2++O2+H+
HO·+H2O2→HOO·+H2O
Fe2++HOO·→HO2-+Fe3+
RH+HO·→R·+H2O
R·+Fe3+→R++Fe2+
R++O2→ROO-→…→CO2+H2O
S2-+HO·→…→S+SO4 2-+H2O
Principle of the reaction mechanism of hydroxyl radical free radical degradable organic pollutant as high-level oxidation technology is exactly super using it Strong oxidizing property is able to achieve to the deep oxidation for being difficult to degradation material.Fenton method is a kind of homogeneous catalytic oxidation method, is containing Asia When adding hydrogen peroxide in the acid solution of iron ion, under the action of catalyst, H2O2Active hydroxyl radical free radical can be generated, from And cause and propagate radical chain reaction, accelerate the oxidation of organic matter and reducing substances.Hydroxyl radical free radical in reaction system ( OH it) is reacted first with organic pollutant RH and generates free radical R, R, which is further aoxidized, generates CO2And H2O, to make organic dirt Dye object is finally degraded.
Anaerobic reactor in the present invention includes settling zone, upper layer three-phase separation area, lower layer three-phase separation area from top to bottom With eddy flow water distribution area, the side wall of settling zone is equipped with water outlet, sets that there are two gas-liquid separator and an arteries and veins above settling zone Water distributor is rushed, pulse water distributing device bottom is equipped with pulse water distribution pipe, and pulse water distribution pipe extends to the reflection cone of eddy flow water distribution area bottom Interior, the top of pulse water distributing device is connect with water inlet pipe, and upper layer three phase separator, lower layer's three-phase separate are equipped in the three-phase separation area of upper layer From lower layer's three phase separator is equipped in area, upper layer three phase separator is connected by biogas pipe with gas-liquid separator, lower layer's three-phase separate It is connected by biogas stripping tube with gas-liquid separator from device, biogas stripping tube is equipped with air inlet pipe, is equipped at the top of gas-liquid separator Firedamp drainage pipe, gas-liquid separator bottom are equipped with down-comer, and down-comer extends in the reflection cone of eddy flow water distribution area bottom, eddy flow Water distribution area is equipped with sludge pipe.
Further, be equipped with circulation water-distributing device in the eddy flow water distribution area, circulation water-distributing device include aqueduct, pump and Multiple water distribution mouths, water distribution mouth are connected with aqueduct, and the other end of aqueduct is connected with upper layer three-phase separation area, and water distribution mouth is opened on In reflection cone, pump is arranged on aqueduct.Further, aqueduct is equipped with valve.
Further, firedamp drainage pipe is equipped with valve.
When anaerobic reactor works:
(1) operational process of water: waste water initially enters pulse water distributing device, and the bottom of eddy flow water distribution area is flow to through pulse water distributor In portion's reflection cone, the edge then through reflection cone rotates upwards, in sludge blanket, detesting in the organic matter and sludge blanket in waste water Oxygen animalcule comes into full contact with, and is converted into methane, carbon dioxide and water, after the bubbles such as methane, carbon dioxide have been adsorbed on sludge, Density is reduced and is floated, until there is the separation of first time gas, solid, liquid after lower layer's three phase separator, gas carries a large amount of liquid Gas-liquid separator is risen to through biogas stripping tube, gas is separated with liquid in gas-liquid separator, and biogas is discharged along biogas pipe, water The reflection cone of bottom is come back to along down-comer.Waste water continues to rise after lower layer's three phase separator, a small amount of organic in waste water Object continues to be degraded, and is converted to methane, carbon dioxide and water, further separates in upper layer three-phase separation area, biogas is through biogas pipe Air inlet liquid/gas separator, after solid sludges deviate from biogas, density increases, under gravity, through down-comer bottom precipitation, waste water Then after settling zone is further separated with sludge, it is discharged outside pond through water outlet.
(2) pump circulation process: it is equipped with circulation water-distributing device in eddy flow water distribution area, circulation water-distributing device includes multiple water distribution mouths And aqueduct, aqueduct are equipped with pump.For waste water difficult to degrade, the biogas of generation is less, only recycles by air lift, it is difficult to reach Very high treatment effect.Using circulation water-distributing device, by treated, waste water is recycled in reflection cone, and reinforcing reflex bores out water flow Speed and muddy water hybrid power.
(3) desulfidation: can generate a large amount of hydrogen sulfide in anaerobic processes, if removing not in time, can inhibit methane backeria Activity.In the reactor, by installing air inlet pipe on biogas stripping tube, it is passed through appropriate oxidizing gas, such as air, will be vulcanized Hydrogen-oxygen is melted into elemental sulfur, by the continuous circulation of biogas stripping tube, while biogas is discharged, by the vulcanization hydrogen-oxygen in waste water Change, has the function that reduce hydrogen sulfide toxicity.
Compared with the prior art, the present invention has the following advantages:
(1) present invention has merged wall jet mechanics, object and mutually strengthens the technologies such as mass transfer, turbulent shear, avoids conscientiously dead Angle, the generation of short flow phenomenon.
(2) oxidation reactor has that low, the floc sludge starting of tank body height is fast, granule sludge generation rate is high, no blocking, No dead angle, without deposition, the strong feature of ability of anti impulsion load.
(3) inlet flow-patterm range is wide, is suitable for the variation of different pH, it can be ensured that stable water outlet and very high removal rate.
(4) lower temperature resistance is strong, and in the case where 11 DEG C, longtime running is still able to maintain removal rate identical with medium temperature, this master It is related with mass-transfer efficiency height.
(5) low energy consumption for processing, high-efficient, stable effluent quality, suitable for the processing of various concentration organic pollutants, operation Simply, operation is convenient.
(6) device at the top of oxidation reactor can remove hydrogen sulfide, and the toxic effect of hydrogen sulfide is avoided to inhibit methane backeria Activity.The characteristics of reactor synthesis two-phase anaerobic reactor, for high sulfate radical waste water treatment effect with higher.
Detailed description of the invention
Fig. 1 is printing-dyeing waste water treatment process figure of the present invention；
Fig. 2 is oxidation reactor structural schematic diagram.
Symbol description:
1. settling zone, 2. upper layer three-phase separation areas, 3. lower layer three-phase separation areas, 4. eddy flow water distribution areas, 5. water outlets, 6. gas Under liquid/gas separator, 7. pulse water distributing devices, 8. pulse water distribution pipes, 9. reflection cones, 10. water inlet pipes, 11. upper layer three phase separators, 12. Layer three phase separator, 13. biogas pipes, 14. biogas stripping tubes, 15. air inlet pipe, 16. firedamp drainage pipes, 17. down-comers, 18. rows Mud pipe, 19. circulation water-distributing devices, 20. water distribution mouths, 21. aqueducts, 22. pumps.
Specific embodiment
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and It is apparent.But examples are merely exemplary, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art answer It should be appreciated that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form repair Change or replace, but these modifications and replacement are fallen within the protection scope of the present invention.
A kind of printing-dyeing waste water treatment process of embodiment 1, as shown in Figure 1, the specific steps are as follows:
(1) desized wastewater adds acid for adjusting pH first into conditioning tank, so that pH is promoted to anaerobic reaction between 6-8, through pump Organic matter in waste water is converted to methane, carbon dioxide and water, while dropping difficult in waste water under the action of anaerobic bacteria by device The larger molecular organics open loop scission of link of solution, becomes small organic molecule, and then supernatant flow to adjusting sedimentation basin certainly；
(2) other comprehensive wastewaters in addition to desized wastewater enter adjusting precipitating after pipeline is collected with the desizing water after anaerobism Chi Hou, precipitates 8h, and supernatant is promoted to anaerobic reation pool through pump, in the effect of anaerobic bacteria, destroys chromophoric group and the production of dyestuff The substances such as raw methane reduce the organic concentration in waste water, and then waste water is through a sedimentation basin, precipitate 10h, after mud-water separation, on Clear liquid flow to the pond A/O certainly, under the action of aerobic bacteria and nitrification, denitrifying bacterium, thorough degradation of organic substances and ammonia nitrogen；
(3) waste water enters secondary settling tank through the pond A/O, through organic matter still difficult to degrade containing part in A/O treated waste water, After precipitating 10h in secondary settling tank, the sludge in secondary settling tank is sent into the pond A/O, and excess sludge is sent into conditioning tank；
(4) it is equipped with micro-electrolysis reactor in the water outlet of secondary settling tank, carbon micro-electrolysis is used to carry out deeply as filler to sewage Degree processing, is added hydrogen peroxide behind for the iron carbon pond in electrolysis reactor, utilizes the ferrous iron and dioxygen generated in the reaction of iron carbon Water combines, and further strengthens wastewater treatment；
(5) waste water by step (4) processing enters dosing pond, and medicament is Fenton reagent, additive amount 0.02- 0.05kg/m3, waste water through dosing pond enter three heavy ponds, in three heavy ponds under the adjustment effect of alkali, carry out mixed precipitation 10h, three Sludge in heavy pond, which is sent into, adjusts sedimentation basin, and supernatant enters the integrated pond XHOC, the supernatant after the processing of the integrated pond XHOC Liquid enters final deposition pool, and for precipitating after 10 hours, supernatant passes through oxidation pond, and into sandfiltration pot, the processing water flowed out through sandfiltration pot is The discharge water of standard, the backwashing water of sandfiltration pot, which is sent into, to be adjusted in sedimentation basin；
It is the active carbon of recycling in the integration pond XHOC, active carbon is followed out of XHOC pond using pneumatic diaphragm pump Ring gets to diaphragm type plate and frame filter press, after being dehydrated, is regenerated, recycling.
Embodiment 2 handles the final sludge that printing-dyeing waste water treatment process of the present invention generates
The final sludge that whole processing technology generates is sent into sludge concentration tank, is dehydrated through dewaterer, by dewatered dirt Mud is burned, and secondary pollution is not generated；The water deviate from the supernatant and dewaterer of sludge concentration tank, which is sent into, adjusts sedimentation basin In handled.
Anaerobic reactor in the treatment process of the present invention of embodiment 3
As shown in Fig. 2, anaerobic reactor includes settling zone 1, upper layer three-phase separation area 2, lower layer's three phase separation from top to bottom Area 3 and eddy flow water distribution area 4, the side wall of settling zone 1 are equipped with water outlet 5, and the top of settling zone 1 sets that there are two gas-liquid separators 6 With a pulse water distributing device 7,7 bottom of pulse water distributing device is equipped with pulse water distribution pipe 8, and pulse water distribution pipe 8 extends to 4th area of eddy flow water distribution In the reflection cone 9 of bottom, the top of pulse water distributing device 7 is connect with water inlet pipe 10, and upper layer three-phase is equipped in upper layer three-phase separation area 2 Separator 11, is equipped with lower layer's three phase separator 12 in lower layer three-phase separation area 3, upper layer three phase separator 11 by biogas pipe 13 with Gas-liquid separator 6 is connected, and lower layer's three phase separator 12 is connected by biogas stripping tube 14 with gas-liquid separator 6, biogas stripping tube 14 are equipped with air inlet pipe 15, and firedamp drainage pipe 16 is equipped at the top of gas-liquid separator 6, and 6 bottom of gas-liquid separator is equipped with down-comer 17, Down-comer 17 extends in the reflection cone 9 of 4 bottom of eddy flow water distribution area, and eddy flow water distribution area 4 is equipped with sludge pipe 18, eddy flow water distribution area 4 Interior to be equipped with circulation water-distributing device 19, circulation water-distributing device 19 includes aqueduct 21, pump 22 and multiple water distribution mouths 20, water distribution mouth 20 with Aqueduct 21 is connected, and the other end of aqueduct 21 is connected with upper layer three-phase separation area 2, and water distribution mouth 20 is opened in reflection cone 9, pump 22 are arranged on aqueduct 21, and aqueduct 21 is equipped with valve；Firedamp drainage pipe 16 is equipped with valve.

Claims (8)

1. a kind of printing-dyeing waste water treatment process, which is characterized in that specific step is as follows:
(1) desized wastewater adds acid for adjusting pH first into conditioning tank, so that pH is promoted to anaerobic reactor between 6-8, through pump, Supernatant flow to adjusting sedimentation basin certainly after desized wastewater is handled in anaerobic reactor；
(2) other comprehensive wastewaters in addition to desized wastewater enter adjusting sedimentation basin with the desizing water after anaerobism after pipeline is collected Afterwards, 8h is precipitated, supernatant is promoted to anaerobic reation pool through pump, and after anaerobic reation pool is handled, waste water is through a sedimentation basin, precipitating 10h, after mud-water separation, supernatant is from flowing to the pond A/O；
(3) waste water enters secondary settling tank through the pond A/O, and after precipitating 10h in secondary settling tank, the sludge in secondary settling tank is sent into the pond A/O, Excess sludge is sent into conditioning tank；
(4) it is equipped with micro-electrolysis reactor in the water outlet of secondary settling tank, uaes carbon as filler and advanced treating is carried out to sewage, micro- Hydrogen peroxide is added behind iron carbon pond in electrolysis reactor, using the ferrous iron generated in the reaction of iron carbon in conjunction with hydrogen peroxide；
(5) waste water by step (4) processing enters dosing pond, and medicament is Fenton reagent, additive amount 0.02-0.05kg/ m3, waste water enters three heavy ponds through dosing pond, in three heavy ponds under the adjustment effect of alkali, mixed precipitation 10h is carried out, in three heavy ponds Sludge, which is sent into, adjusts sedimentation basin, and supernatant enters the integrated pond XHOC, and wherein the pond XHOC is that activated carbon from activated sludge is inner circulation fluidized Bed, supernatant enters final deposition pool after the processing of the integrated pond XHOC, and for precipitating after 10 hours, supernatant passes through oxidation pond, enters Sandfiltration pot, the processing water through sandfiltration pot outflow are the discharge water of standard, and the backwashing water of sandfiltration pot, which is sent into, to be adjusted in sedimentation basin.
2. treatment process according to claim 1, which is characterized in that be the work of recycling in the integration pond XHOC Property charcoal, active carbon recycle out of XHOC pond using pneumatic diaphragm pump and is got to diaphragm type plate and frame filter press, and after being dehydrated, progress is again It is raw, recycling.
3. treatment process according to claim 1 or 2, which is characterized in that the final sludge of generation is admitted to sludge condensation Then Chi Zhong is dehydrated through dewaterer, dewatered sludge is burned, and is deviate from the supernatant and dewaterer of sludge concentration tank Water, which is sent into, adjusts sedimentation basin.
4. treatment process according to claim 1, which is characterized in that the additive amount of Fenton reagent in the step (5) For 0.035kg/m3。
5. treatment process according to claim 1, which is characterized in that anaerobic reactor include from top to bottom settling zone, on The side wall of layer three-phase separation area, lower layer three-phase separation area and eddy flow water distribution area, settling zone is equipped with water outlet, the top of settling zone If pulse water distributing device bottom is equipped with pulse water distribution pipe, pulse water distribution Guan Yan there are two gas-liquid separator and a pulse water distributing device It extends in the reflection cone of eddy flow water distribution area bottom, the top of pulse water distributing device is connect with water inlet pipe, and upper layer is set in three-phase separation area There is upper layer three phase separator, is equipped with lower layer's three phase separator in lower layer three-phase separation area, upper layer three phase separator passes through biogas pipe It is connected with gas-liquid separator, lower layer's three phase separator is connected by biogas stripping tube with gas-liquid separator, is set on biogas stripping tube There is air inlet pipe, firedamp drainage pipe is equipped at the top of gas-liquid separator, gas-liquid separator bottom is equipped with down-comer, and down-comer extends to rotation It spreads in the reflection cone of pool bottom, eddy flow water distribution area is equipped with sludge pipe.
6. treatment process according to claim 5, which is characterized in that be equipped with circulation water distribution dress in the eddy flow water distribution area Set, circulation water-distributing device include that aqueduct, pump and multiple water distribution mouths, water distribution mouth are connected with aqueduct, the other end of aqueduct and Upper layer three-phase separation area is connected, and water distribution mouth is opened in reflection cone, and pump is arranged on aqueduct.
7. treatment process according to claim 6, which is characterized in that the aqueduct is equipped with valve.
8. treatment process according to claim 5, which is characterized in that the firedamp drainage pipe is equipped with valve.
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CN107759020A (en) * 2017-11-09 2018-03-06 苏州苏沃特环境科技有限公司 A kind of chemical fibre class printing and dyeing wastewater processing equipment and method
CN108164060A (en) * 2018-01-31 2018-06-15 常州市武进天工机械制造有限公司 A kind of printing and dyeing secondary settlement waste water treatment process
CN110054349A (en) * 2019-04-16 2019-07-26 杭州恒美环保设备有限公司 A kind of economical dyeing waste water denitrogenation processing system
CN110803765A (en) * 2019-12-11 2020-02-18 辽宁博创环保技术有限公司 Anaerobic reactor for treating high-concentration organic wastewater
CN111661985A (en) * 2020-06-22 2020-09-15 南京环保产业创新中心有限公司 Electrically enhanced internal circulation anaerobic reactor and method
CN115893659B (en) * 2022-12-02 2024-05-24 西南交通大学 Pulse gas release type anaerobic granular sludge bioreactor and wastewater treatment method

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