CN100469718C - Equipment and method for treating wastewater difficult to be degraded by biology method of hydrolysis composite membrane - Google Patents

Equipment and method for treating wastewater difficult to be degraded by biology method of hydrolysis composite membrane Download PDF

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CN100469718C
CN100469718C CNB2007100222717A CN200710022271A CN100469718C CN 100469718 C CN100469718 C CN 100469718C CN B2007100222717 A CNB2007100222717 A CN B2007100222717A CN 200710022271 A CN200710022271 A CN 200710022271A CN 100469718 C CN100469718 C CN 100469718C
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hydrolysis
water
reactor
membrane
district
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CNB2007100222717A
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CN101050042A (en
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王世和
吴慧芳
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东南大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage
    • Y02W10/15Aerobic processes

Abstract

This invention relates to apparatus and method for treating wastewater by hydrolysis-composite membrane biological method. The apparatus comprises: a multi-grid hydrolysis reactor and a composite membrane bioreactor. The method comprises: (1) introducing wastewater into the multi-grid hydrolysis reactor, and hydrolyzing in an anaerobic condition; (2) introducing the hydrolyzed wastewater into the contact oxidation region of the composite membrane reactor, and performing aerobic biological treatment; (3) introducing wastewater into the membrane separation region of the composite membrane bioreactor, and performing further aerobic biological treatment; (4) returning the sludge produced in the multi-grid hydrolysis reactor and the composite membrane bioreactor to the flow-guide region.

Description

Hydrolysis-composite membrane biological process is handled the apparatus and method of used water difficult to degradate

Technical field

The present invention relates to a kind of hydrolysis-composite membrane biological process and handle the apparatus and method of used water difficult to degradate, belong to the technical field of organic dirt (giving up) water treatment.

Background technology

For the indegradable industrial effluent that has a large capacity and a wide range, adopt single aerobe method or anaerobic biological process to be difficult to qualified discharge, and adopt physical chemistry method, working cost is too high again.Utilize anaerobic hydrolysis that used water difficult to degradate is carried out pre-treatment, the method that connects the oxygen biological treatment is more progressively approved.The anaerobic hydrolysis pre-treatment waterpower residence time is short, to the transformation efficiency height of hardly degraded organic substance, and can increase substantially the biodegradability of waste water.Realize efficient degradation through the organism that hydrolysis transforms at follow-up aerobic section.Anaerobic hydrolysis technology and aerobic process combination treatment used water difficult to degradate are confirmed by big quantity research and actual engineering.Can not guarantee the residence time but still exist in actual applications, short stream and channel occur, waste water can not contact by thorough mixing with mud, can not guarantee problems such as treatment effect.In the traditional biological treatment process, the mud-water separation effect of second pond is not good enough, and the water outlet concentration of suspension is higher, and sludge bulking easily takes place.In order effectively to address these problems, membrane-biotechnology has obtained development rapidly.The present invention carries out organic integration and combination with the two, has proposed biology method of hydrolysis composite membrane method of wastewater treatment and device.

Summary of the invention

Technical problem: the purpose of this invention is to provide the apparatus and method that a kind of hydrolysis-composite membrane biological process is handled used water difficult to degradate, hydrolysis and composite membrane biological process are organically combined, with overcome the used water difficult to degradate biodegradability that exists in the existing technology poor, can not guarantee the residence time, be prone to short stream and channel, shortcoming such as waste water and mud can not thorough mixing contact, the mud-water separation effect is not good enough.Use the inventive method, the waste water after the processing can qualified discharge and the requirement that realizes recycling.

Technical scheme: the device that hydrolysis of the present invention-composite membrane biological process is handled used water difficult to degradate comprises many lattice chamber hydrolysis reactor, hybrid mbr, wherein, the water side of many lattice chamber hydrolysis reactor is connected with the water-in of hybrid mbr by pipe connecting, place membrane module in hybrid mbr, this membrane module is connected with the membrane sepn rising pipe; Hybrid mbr by first control valve, first reflux pump, by return line regularly with the mixed-liquor return of the hybrid mbr water inlet pipe of lattice chamber hydrolysis reactor at the most; Compressed air pipe is connected with the aeration tube of bottom in the hybrid mbr, connect the entrance end of switching valve in the outlet of hybrid mbr bottom mud collection area, an outlet termination excess sludge pipe of switching valve, another exit end of switching valve and second control valve outlet of Duo Ge chamber hydrolysis reactor bottom meet the entrance end of second reflux pump, the water conservancy diversion district in many lattice of outlet termination chamber hydrolysis reactor of second reflux pump respectively.

Many lattice chamber hydrolysis reactor is made up of 3~7 hydrolysis reaction chambers that are in series, the top of each hydrolysis reaction chamber is open type, the bottom of each hydrolysis reaction chamber is provided with the spoil disposal blow-down pipe, the last step of hydrolysis reaction chamber is the settling region, top in the settling region is provided with commutating zone, and commutating zone is connected with pipe connecting; At the indoor dividing plate that is provided with of hydrolysis reaction, each hydrolysis reaction chamber is divided into a water conservancy diversion district and a reaction zone, this two district communicates in the bottom of hydrolysis reaction chamber, become 30~60 ° flow deflector with plummet in the setting of the lower end of dividing plate, the water conservancy diversion district in the first step hydrolysis reaction chamber is connected with water inlet pipe.

Described hybrid mbr comprises catalytic oxidation district, the membrane separation zone that the bottom is connected, and mud collection area is positioned at the bottom of membrane separation zone; Suspension type or floating filler are set in the catalytic oxidation district, place membrane module in the membrane separation zone, aeration tube is equipped with in the bottom of catalytic oxidation district, membrane separation zone, the gradient i=1 of hybrid mbr lower raft: 100~2: 100.

The method that hydrolysis of the present invention-composite membrane biological process is handled used water difficult to degradate may further comprise the steps:

1.) anaerobic hydrolysis: pending waste water enters in the hydrolysis reactor of many lattice chamber by water inlet pipe, the waste water processing that under anoxia condition, is hydrolyzed, and reaction process is controlled at hydrolysis stage;

2.) aerobic degradation/membrane sepn: the catalytic oxidation district that the waste water of handling through many lattice chamber hydrolysis reactor anaerobic hydrolysis enters hybrid mbr carries out aerobe and handles, suspension type or floating filler are set in the catalytic oxidation district, with active bio attached on the filler in the membrane bioreactor, aeration tube by the membrane bioreactor bottom carries out the aeration oxygen supply, and waste water carries out bio-oxidation in this district handles; Waste water after the catalytic oxidation district handles, the membrane separation zone that enters hybrid mbr further carries out aerobe to be handled, and carries out mud-water separation by the membrane module that is provided with in the membrane separation zone; Membrane module is retained in the larger molecular organics of difficult degradation, active sludge etc. in the reactor, has improved the sludge concentration in the reactor, reduces the organic concentration in the water outlet, finishes mud-water separation; Part muddy water mixed solution in the hybrid mbr is back to water conservancy diversion district in the hydrolysis reactor of many lattice chamber; The part of precipitating sludge in many lattice chamber hydrolysis reactor and the hybrid mbr is back to the water conservancy diversion district of many lattice chamber hydrolysis reactor.

In described anaerobic hydrolysis step, regulating waste water ph is 6.5~9.0,5~32 ℃ of hydrolysis temperatures, and the controlled oxidation reduction potential is between-100mV~50mV, and hydraulic detention time is 6~8h.In described aerobic degradation/membrane sepn step, gas-water ratio is 20~30:1, and the residence time is 8~12 hours.

In the prior art, aerobic degradation generally is to carry out in independent reactor, and waste water carries out traditional mud-water separation again, or carries out membrane sepn behind aerobic degradation in second pond.The present invention is combined in aerobic degradation and discrete group in the hybrid mbr and carries out.Hybrid mbr of the present invention is divided into catalytic oxidation district (packing area), membrane separation zone and mud district, wherein, the microbial growth mode has suspension growth and apposition growth, constitutes a complicated ecosystem of being made up of a plurality of trophic levels such as bacterium, fungi, algae, protozoon and metazoans.Than traditional biochemical treatment reactor, in the hybrid mbr, constitute along water (flow) direction and to adhere to aerobic type, adhere to facultative type, adhere to anaerobic type and the microflora of the multiple different mobilities of the aerobic type that suspends, type of respiration, nutrient type, improved the processing power and the stability of reactor.Simultaneously, because the existence of membrane sepn makes that the microorganism in the system is held back at this, under this stops, form synchronous nitration and denitrification than long nitrification and denitrification bacterium generation time.Therefore, the biophase in catalytic oxidation district becomes abundanter.For membrane separation zone, because the existence in catalytic oxidation district makes and a part of microorganism fixed growth can play the effect of decelerating membrane pollution.

In aerobic degradation/membrane sepn step, under the effect of waste water that anaerobic hydrolysis is handled, carry out aerobe and handle at active sludge, realize efficient degradation.Waste water behind the aerobic degradation adopts membrane module to carry out mud-water separation, and the larger molecular organics of difficult degradation, active sludge etc. are retained in the reactor, has greatly improved the sludge concentration in the reactor, has reduced the organic concentration in the water outlet.

For further implementing the inventive method effectively, can regularly the part muddy water mixed solution in the hybrid mbr be back to the anaerobic hydrolysis section, carry out denitrification denitrogenation simultaneously in the anaerobic hydrolysis step; Also the precipitating sludge of anaerobic hydrolysis reactor and hybrid mbr can be partly refluxed to the anaerobic hydrolysis section, make the anaerobic hydrolysis reaction can remain high sludge concentration, and reduce the discharging of excess sludge.

Described flow deflector can make water distribution even, guarantees the thorough mixing with mud.Because in hydrolysis reactor reaction being controlled at hydrolysis stage carries out, do not have gas to produce, and the setting of flow deflector can make current keep turbulent fluidised form in the water conservancy diversion district, and keep laminar flow state at reaction zone.Thereby in hydrolysis reactor, current are as general as the plug-flow fluidised form, also are plug-flow between each lattice chamber, short stream and channel can not occur, thereby guarantee the contact mixing of waste water with mud; And in each hydrolysis reaction chamber, waste water baffling in water conservancy diversion district and reaction zone moves ahead, and guarantees that hydrolysis reaction has enough residence time, and used water difficult to degradate can fully be degraded, and becomes the intermediate product of degradable or easy degraded, increases substantially the biodegradability of waste water.

Further, it is domatic water conservancy diversion to be set in each bottom, lattice chamber, and domatic angle is 50~60 °.The setting that water conservancy diversion is domatic can play guide functions, can reduce the reactor dead volume again.

Through the waste water that many lattice chamber hydrolysis reactor is handled, be introduced into the catalytic oxidation district of hybrid mbr.Suspension type or floating filler are set in the catalytic oxidation district, and attached on the filler in the membrane bioreactor, the aeration tube of reactor bottom carries out the aeration oxygen supply with active bio, and waste water carries out oxidation degradation in this district.Waste water after the aerobic treatment enters the membrane separation zone of hybrid mbr.Carry out mud-water separation by the membrane module that is provided with in the membrane separation zone, membrane module can be retained in the larger molecular organics of difficult degradation, active sludge etc. in the reactor, has improved the sludge concentration in the reactor, has reduced the organic concentration in the water outlet.The mud-water separation effect that has effectively overcome second pond in the traditional biological treatment process is not good enough, the water outlet concentration of suspension is higher, shortcomings such as sludge bulking easily take place.Reactor bottom is a mud collection area, bottom surface gradient i=1: 100~2: 100.

Described hybrid mbr is divided into bio-contact oxidation district, membrane separation zone and mud collection area, definite functions, and the current distributed uniform is reasonable, guarantees the treatment efficiency of reactor.

Beneficial effect: according to method of wastewater treatment of the present invention and device, organic assembling and integrated is carried out in hydrolysis and composite membrane biological process, can effectively handle to used water difficult to degradate.

(1) combination of hydrolysis and composite membrane biological process, waste water is gone through hydrolysis and aerobic degradation process.Hardly degraded organic substance carries out part and decomposes, and the intermediate product that becomes degradable or easily degrade improves its biodegradability greatly; The aerobic degradation process then plays the efficient degradation effect.Used water difficult to degradate is after the inventive method is handled, but the requirement of qualified discharge and realization resource utilization.

(2) the membrane sepn step can effectively be carried out mud-water separation, reduces the organic concentration in the water outlet, and keeps the sludge concentration in the reactor; The raising of mud-water separation efficient helps the recycle of mud, reduces the discharging of excess sludge.

(3) hydrolysis reactor lattice chamber, many lattice chamber form is similar to upflow sludge blanket, but reaction process only is controlled at hydrolysis stage, does not have gas to produce.So lattice chamber fluidised form is different from up-flow anaerobic sludge blanket and anaerobic baffled reactor, totally is the plug-flow fluidised form.Be plug-flow also between each lattice chamber, thereby guaranteed the contact mixing of waste water, guarantee treatment effect with mud.

(4) hybrid mbr is divided into bio-contact oxidation district, membrane separation zone and mud collection area, definite functions, and the current distributed uniform is reasonable, guarantees the treatment efficiency of reactor.

(5) the microbial growth pattern not only has suspension growth, and apposition growth is also arranged, and in the different steps of treatment process different microbial environments is arranged, and has realized biophasic diversity.

The contriver uses method of the present invention, and dyeing waste water is hydrolyzed-composite membrane biological process Processing Test, and the result shows, water inlet COD CrFor 600mg/L~1400mg/L, colourity are 150~400 times dyeing waste water, after biology method of hydrolysis composite membrane is handled, water outlet COD CrBelow 100mg/L, colourity has all reached the I grade standard (COD of " textile dyeing and finishing industrial water pollution thing emission standard " (GB4287-92) regulation below 10 times Cr≤ 100mg/L, colourity≤40 times).The COD of this technology CrClearance is about 90%.Wherein, the COD of many lattice chamber hydrolysis reactor CrClearance is 50%~65%.The COD of aerobic hybrid mbr CrClearance reaches about 80%.Chroma removal rate is more than 96%.

Description of drawings

Fig. 1 is the process flow sheet of the inventive method.

Fig. 2 is a process unit synoptic diagram of the present invention.

Fig. 3 is the structural representation of many lattice chamber hydrolysis reactor.

Fig. 4 is the structural representation of hybrid mbr.

Have among the above figure: many lattice chamber hydrolysis reactor 1, water conservancy diversion district 1-1, reaction zone 1-2, settling region 1-3, commutating zone 1-4, flow deflector 1-5, spoil disposal blow-down pipe 1-6, pipe connecting 1-7, hydrolysis reactor water inlet pipe 1-8, hydrolysis reaction chamber 1-9, dividing plate 1-91; Hybrid mbr 2, catalytic oxidation district 2-1, membrane separation zone 2-2, mud collection area 2-3, filler 2-4, membrane module 2-5, aeration tube 2-6, base plate 2-7, bio-reactor water-in 2-8, gradient i; Membrane sepn rising pipe B, the first control valve 3-1, the second control valve 3-2, the first reflux pump 4-1, the second reflux pump 4-2, mixed-liquor return pipe 6, compressed air pipe A, switching valve 5, excess sludge pipe 7.

COD when Fig. 5 is treatment of dyeing and printing CrLast the variation synoptic diagram.

COD when Fig. 6 is treatment of dyeing and printing CrClearance last the variation synoptic diagram.

Embodiment

The device that biology method of hydrolysis composite membrane of the present invention is handled used water difficult to degradate comprises many lattice chamber hydrolysis reactor 1, hybrid mbr 2, wherein, the water side of many lattice chamber hydrolysis reactor 1 is connected with the water-in 2-8 of hybrid mbr 2 by pipe connecting 1-7, be connected with membrane sepn rising pipe B on the membrane module in hybrid mbr 2, in hybrid mbr 2, be connected to the water inlet pipe 1-8 of many lattice chamber hydrolysis reactor 1 by the first control valve 3-1, the first reflux pump 4-1, mixed-liquor return pipe 6; Compressed air pipe A is connected with the aeration tube 2-6 of bottom in the hybrid mbr 2, hybrid mbr 2 bottom mud collection area 2-3 outlet connects the inlet side of switching valve 5, an outlet termination excess sludge pipe 7 of switching valve 5, another exit end of switching valve 5 and Duo Ge chamber hydrolysis reactor 1 bottom second control valve 3-2 outlet meet the entrance end of the second reflux pump 4-2, the water conservancy diversion district 1-1 in many lattice of outlet termination chamber hydrolysis reactor 1 of the second reflux pump 4-2 respectively.Many lattice chamber hydrolysis reactor 1 is made up of 3~7 hydrolysis reaction chamber 1-9 that are in series, the top of each hydrolysis reaction chamber 1-9 is open type, the bottom of each hydrolysis reaction chamber 1-9 is provided with spoil disposal blow-down pipe 1-6, the last step of hydrolysis reaction chamber 1-9 is settling region 1-3, be provided with commutating zone 1-4 on the top of settling region 1-3, the outlet of commutating zone 1-4 is connected with pipe connecting 1-7; In the 1-9 of hydrolysis reaction chamber, dividing plate 1-91 is set, each hydrolysis reaction chamber 1-9 is divided into a water conservancy diversion district 1-1 and a reaction zone 1-2, this two district communicates in the bottom of hydrolysis reaction chamber 1-9, become 30~60 ° flow deflector 1-5 with plummet in the setting of the lower end of dividing plate 1-91, the water conservancy diversion district 1-1 among the first step hydrolysis reaction chamber 1-9 is connected with water inlet pipe 1-8.Described hybrid mbr 2 comprises catalytic oxidation district 2-1, the membrane separation zone 2-2 that the bottom is connected, and mud collection area 2-3 is positioned at the bottom of membrane separation zone 2-2; Suspension type or floating filler 2-4 are set in the catalytic oxidation district 2-1, place membrane module 2-5 in the membrane separation zone 2-2, aeration tube 2-6 is equipped with in the bottom of catalytic oxidation district 2-1, membrane separation zone 2-2, gradient i=1:100~2:100 of hybrid mbr 2 lower raft 2-7.

Present embodiment adopts method of the present invention and device that dyeing waste water is handled.Pending dyeing waste water water inlet COD CrBe 600mg/L~1400mg/L, colourity is 150~400 times.

Fig. 1 is seen in technical process, comprises anaerobic hydrolysis, aerobic degradation/membrane sepn step.Adopt device of the present invention, device is seen Fig. 2, wherein, carries out the anaerobic hydrolysis step in hydrolysis reactor 1, carries out aerobic degradation/membrane sepn step in hybrid mbr 2.

The pH value of waste water is adjusted to 6.5~9.0, enters many lattice chamber hydrolysis reactor 1 pre-treatment that is hydrolyzed by the water tank of voltage regulation run by gravity; Water temperature is 5~32 ℃, the residence time 6~8h.The hybrid mbr residence time is 8~12h, and the water inlet organic loading is 2.08kgCOD Cr/ (m 3D)~3.60kgCOD Cr/ (m 3D), sludge concentration is 3~7g/L, and gas-water ratio is 20~30:1.

Fig. 3 is the structure iron of many lattice chamber hydrolysis reactor 1, the hydrolysis reactor of test is made up of 5 lattice that communicate, compartment is with barrier partitions, the spoil disposal blow-down pipe is established in each lattice bottom, last lattice are the settling chamber, all the other each chambers are the hydrolysis reaction chamber, and each hydrolysis reaction chamber is divided into water conservancy diversion district 1-1 and biochemical reaction zone 1-2, are equipped with in the biochemical reaction zone 1-2 through cultivating the active sludge of domestication.Waste water is plug-flow state baffling and moves ahead in each hydrolysis reaction chamber, hydrolysis reaction takes place in biochemical reaction zone 1-2.Behind hydrolysis reaction, enter settling region 1-3 and make precipitation process, enter hybrid mbr 2 through commutating zone 1-4 run by gravitys.The flow deflector 1-5 of α=45 ° is established in hydrolysis reactor bottom in many lattice chamber, and spoil disposal blow-down pipe 1-6 is established in each bottom, lattice chamber.

The pretreated waste water of hydrolysis carries out biology aerobic degraded and membrane sepn in hybrid mbr 2.Hybrid mbr 2 is divided into catalytic oxidation district 2-1, membrane separation zone 2-2 and mud collection area 2-3 three parts, and its structure is seen shown in Figure 4.The waste water catalytic oxidation district 2-1 through filler 2-4 is housed is earlier degraded, and the membrane module 2-5 in membrane separation zone 2-2 carries out membrane sepn.Aeration is provided by air pump, through gas meter metering, carries out the aeration oxygen supply by the aeration tube 2-6 of membrane bioreactor 2 bottoms.Mud is that 1: 100 base plate 2-7 enters mud collection area 2-3 through base slope.

The precipitating sludge of many lattice chamber hydrolysis reactor 1 and hybrid mbr 2 is back to the pond head of many lattice chamber hydrolysis reactor 1 by sludge reflux pump, help sludge digestion, make treatment process have sufficient mud balanced capacity, excess sludge is through excess sludge pipe 7 discharge systems.

Present method can be carried out denitrogenation processing simultaneously, and waste water enters many lattice chamber hydrolysis reactor 1, and under anoxia condition, the organonitrogen in the waste water carries out ammonification and generates ammonia nitrogen under the effect of Ammonifying bacteria; Hydrolysis reactor 1 water outlet of many lattice chamber enters membrane bioreactor 2, and under the effect of nitrobacteria, ammonia nitrogen is converted into nitric nitrogen and nitrite nitrogen; The partially mixed liquid of hybrid mbr 2 flows to pond head or other lattice chambers of leading portion of many lattice chamber hydrolysis reactor 1 by blowback, finishes denitrification under anoxia condition, reaches the purpose of denitrogenation; In addition, on the filler 2-4 of biological attachment in membrane bioreactor 2, the nitrogen in the waste water carries out synchronous nitration and denitrification denitrogenation under biomembranous effect, thereby reaches the purpose of denitrogenation.

Adopt aforesaid method and device that dyeing waste water is handled, move 150 days, its result is as follows:

Hydrolysis-composite membrane biological process treatment of dyeing and printing COD CrLast variation as shown in Figure 5.Test in two stages water inlet COD CrBe respectively 1000mg/L~1400mg/L and 600mg/L~800mg/L.In the two-stage experiment, many lattice chamber hydrolysis reactor 1 water outlet COD CrAt 300mg/L~700mg/L and 200mg/L~400mg/L; The water outlet COD of membrane module 2-5 in the hybrid mbr 2 CrAll below 100mg/L, reach textile dyeing and finishing industry I level emission standard.The supernatant C OD of hybrid mbr 2 CrThan film water outlet COD CrHigh 100mg/L~300mg/L, hence one can see that, and the crown_interception effect of film is remarkable.

Waste water COD CrClearance last variation as shown in Figure 6.As seen, hydrolysis-composite membrane biological process treatment process is stable, and clearance remains on about 90% always.In 100 days, the COD of many lattice chamber hydrolysis reactor 1 CrClearance is about 50%.Along with the prolongation of operation course, COD CrClearance is brought up to about 65%.The COD of hybrid mbr 2 CrClearance reaches 80%.

After measured, hydrolysis-composite membrane biological process treatment process chroma removal rate is more than 96%, and wherein, many lattice hydrolysis reactor chroma removal rate reaches more than 90%, and as seen, color removal is mainly in many lattice hydrolysis section.

To sum up, through the dyeing waste water that hydrolysis-composite membrane biological process is handled, its water outlet COD CrAll below 100mg/L, can stablize and reach textile dyeing and finishing industry I level emission standard, and can partly carry out recycling.

Claims (6)

1, a kind of hydrolysis-composite membrane biological process is handled the device of used water difficult to degradate, it is characterized in that this device comprises many lattice chamber hydrolysis reactor (1), hybrid mbr (2), wherein, the water side of many lattice chamber hydrolysis reactor (1) is connected with the water-in (2-8) of hybrid mbr (2) by pipe connecting (1-7), in hybrid mbr (2), place membrane module (2-5), this membrane module (2-5) is connected with membrane sepn rising pipe (B), and hybrid mbr (2) is by first control valve (3-1), first reflux pump (4-1), be connected to the water inlet pipe (1-8) of many lattice chamber hydrolysis reactor (1) by mixed-liquor return pipe (6); Compressed air pipe (A) is connected with the aeration tube (2-6) of the interior bottom of hybrid mbr (2), connect the entrance end of switching valve (5) in the outlet of hybrid mbr (2) bottom mud collection area (2-3), an outlet termination excess sludge pipe (7) of switching valve (5), another exit end of switching valve (5) and Duo Ge chamber hydrolysis reactor (1) bottom second control valve (3-2) outlet meet the entrance end of second reflux pump (4-2), the water conservancy diversion district (1-1) in many lattice of outlet termination chamber hydrolysis reactors (1) of second reflux pump (4-2) respectively.
2. hydrolysis according to claim 1-composite membrane biological process is handled the device of used water difficult to degradate, it is characterized in that many lattice chamber hydrolysis reactor (1) is made up of 3~7 the hydrolysis reaction chambers (1-9) that are in series, the top of each hydrolysis reaction chamber (1-9) is open type, the bottom of each hydrolysis reaction chamber (1-9) is provided with spoil disposal blow-down pipe (1-6), the last step of hydrolysis reaction chamber (1-9) is settling region (1-3), the top of (1-3) is provided with commutating zone (1-4) in the settling region, and commutating zone (1-4) is connected with pipe connecting (1-7); Dividing plate (1-91) is set in hydrolysis reaction chamber (1-9), each hydrolysis reaction chamber (1-9) is divided into a water conservancy diversion district (1-1) and a reaction zone (1-2), this two district communicates in the bottom of hydrolysis reaction chamber (1-9), become 30~60 ° flow deflector (1-5) with plummet in the setting of the lower end of dividing plate (1-91), the water conservancy diversion district (1-1) in the first step hydrolysis reaction chamber (1-9) is connected with water inlet pipe (1-8).
3, hydrolysis according to claim 1-composite membrane biological process is handled the device of used water difficult to degradate, it is characterized in that catalytic oxidation district (2-1), membrane separation zone (2-2) that described hybrid mbr (2) comprises the bottom and is connected, mud collection area (2-3) is positioned at the bottom of membrane separation zone (2-2); Suspension type or floating filler (2-4) are set in the catalytic oxidation district (2-1), place membrane module (2-5) in the membrane separation zone (2-2), aeration tube (2-6) is equipped with in the bottom of catalytic oxidation district (2-1), membrane separation zone (2-2), the gradient (i)=1:100~2:100 of hybrid mbr (2) lower raft (2-7).
4. the device of hydrolysis as claimed in claim 1-composite membrane biological process processing used water difficult to degradate is handled the method for used water difficult to degradate accordingly, it is characterized in that this method may further comprise the steps:
1.) anaerobic hydrolysis: pending waste water enters in many lattice chamber hydrolysis reactor (1) by water inlet pipe (1-8), the waste water processing that under anoxia condition, is hydrolyzed, and reaction process is controlled at hydrolysis stage;
2.) aerobic degradation/membrane sepn: the catalytic oxidation district (2-1) that the waste water of handling through many lattice chamber hydrolysis reactor (1) anaerobic hydrolysis enters hybrid mbr (2) carries out aerobe and handles, suspension type or floating filler (2-4) are set in catalytic oxidation district (2-1), with active bio attached on the filler in the membrane bioreactor, aeration tube (2-6) by the membrane bioreactor bottom carries out the aeration oxygen supply, and waste water carries out bio-oxidation in this district handles; Waste water after catalytic oxidation district (2-1) handles, the membrane separation zone (2-2) that enters hybrid mbr (2) further carries out aerobe to be handled, and carries out mud-water separation by the membrane module (2-5) that is provided with in the membrane separation zone (2-2); Membrane module is retained in the larger molecular organics of difficult degradation, active sludge etc. in the reactor, improves the sludge concentration in the reactor, reduces the organic concentration in the water outlet, finishes mud-water separation; Part muddy water mixed solution in the hybrid mbr (2) is back to water conservancy diversion district (1-1) in many lattice chamber hydrolysis reactor (1); The many lattice chamber hydrolysis reactor (1) and the part of the middle precipitating sludge of hybrid mbr (2) are back to the water conservancy diversion district (1-1) of many lattice chamber hydrolysis reactor (1).
5, hydrolysis according to claim 4-composite membrane biological process is handled the method for used water difficult to degradate, it is characterized in that: in described anaerobic hydrolysis step, regulating waste water ph is 6.5~9.0,5~32 ℃ of hydrolysis temperatures, the controlled oxidation reduction potential is between-100mV~50mV, and hydraulic detention time is 6~8h.
6, hydrolysis according to claim 4-composite membrane biological process is handled the method for used water difficult to degradate, and it is characterized in that: in described aerobic degradation/membrane sepn step, gas-water ratio is 20~30:1, and the residence time is 8~12 hours.
CNB2007100222717A 2007-05-11 2007-05-11 Equipment and method for treating wastewater difficult to be degraded by biology method of hydrolysis composite membrane CN100469718C (en)

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