CN104556578A - Method for deep treatment of wastewater - Google Patents

Method for deep treatment of wastewater Download PDF

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Publication number
CN104556578A
CN104556578A CN201510005496.6A CN201510005496A CN104556578A CN 104556578 A CN104556578 A CN 104556578A CN 201510005496 A CN201510005496 A CN 201510005496A CN 104556578 A CN104556578 A CN 104556578A
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sludge
precipitation
reflux
waste water
deep treatment
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CN104556578B (en
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张贵民
苏建文
时永辉
王彩冬
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Shandong New Time Pharmaceutical Co Ltd
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Shandong New Time Pharmaceutical 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
    • C02F1/66—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
    • 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
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • 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
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • 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
    • 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
    • C02F3/02—Aerobic processes
    • 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
    • C02F3/30—Aerobic and anaerobic processes

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention belongs to the technical field of sewage treatment and relates to a method for deep treatment of wastewater. The technical scheme is that the method comprises the steps of active sludge biological reaction, co-precipitation, sludge refluxing, Fenton oxidation, pH adjustment, sludge-water mixture refluxing, end sedimentation drainage and the like, wherein the sludge-water mixture generated by pH adjustment after a Fenton reaction is returned to co-precipitation without precipitation and is mixed with the effluent of the active sludge biological reaction to perform co-precipitation, and the sludge-water mixture and biochemical sludge form a co-precipitation system by using functions of fast sedimentation, colloid flocculation, net capturing and the like of the sludge-water mixture. By using the method provided by the invention, the sedimentation velocity of biochemical effluent sludge can be greatly promoted, the concentration of effluent suspended matters in a sedimentation tank can be reduced, the construction volume of a co-precipitation tank can be reduced, the Fenton iron sludge production quantity can be reduced, and the total operation cost can be reduced. The method provided by the invention can be widely used for deep treatment of pharmaceutical wastewater, chemical wastewater, papermaking wastewater and the like in the field of wastewater treatment.

Description

A kind of deep treatment method of waste water
Technical field
The invention belongs to technical field of sewage, relate to a kind of deep treatment method of waste water, particularly a kind of advanced waste treatment method improving biochemical sludge settling property and improve effluent quality.
Background technology
Biological effluent treatment has the advantages such as running cost is low, treatment effect efficient, stable, therefore becomes the core process of sewage disposal.But due to the lifting of wastewater discharge standard in recent years, bio-chemical effluent is difficult to arrive emission standard.Fenton oxidation technique, because of many advantages such as its strong oxidizing property, chain rupture to organic molecule, ring opening and the renewable voltinisms of raising waste water, is often used to process secondary biochemical effluent.Biological treatment is a kind of effective Sewage advanced treatment combination process in conjunction with Fenton oxidation process.The decisive material of biological treatment is the living microorganism be suspended in reaction tank, and in wastewater treatment process, microorganism constantly increases breeding, and too much and aging, dead microorganism drains into coprecipitated pond precipitation in the mode of excess sludge and discharges.The settling efficiency of biochemical sludge directly represent the treatment effect of waste water, also determines the deposition efficiency in coprecipitated pond and the scale of pond body.Biological treatment system is due to the change of change of water quality or processing load, and regular generation sludge bulking phenomenon, cause SV (sludge settling ratio) to raise fast, biochemical sludge is difficult to sedimentation for a long time, goes out water suspension and seriously raises.And when biochemical sludge SV remains high, higher water outlet COD and concentration of suspension, had a strong impact on the carrying out of subsequent reactions.Good biochemical sludge settling efficiency significantly can be saved the wastewater treatment time, reduces settling tank tank volume, reduce cost for wastewater treatment and structures laid down cost.Fenton oxidation is a kind of effective advanced treatment process, because Fenton reaction needed constantly adds ferrous sulfate medicament, so Fenton oxidation also can produce a large amount of iron mud, difficult treatment while efficient process waste water, increases running cost.
Patent application 201310139391.0 is back to coprecipitated pond by after iron mud activation treatment, to improving coprecipitated pond deposition efficiency, reduces coprecipitated pond volume.But because Fenton iron mud leaves standstill for a long time, phase mutual precipitation extruding between flco, change comparatively closely knit, in small, broken bits, therefore settling property promotes limited; And activator and adding of PAM medicament add running cost, operation is comparatively complicated.
Summary of the invention
In order to overcome the deficiency of existing wastewater processing technology, the invention reside in and a kind of advanced waste treatment method that can improve biochemical sludge settling property and improve effluent quality is provided.
To achieve these goals, the technical solution used in the present invention is:
A kind of deep treatment method of waste water, comprise active sludge biological reaction, co-precipitation and the backflow of sludge reflux, Fenton oxidation, pH regulator and mud mixture, whole mattress sinking water, the mud mixture that after Fenton reaction, pH regulator produces just carries out being back to after the water outlet in reacting with active sludge biological in co-precipitation mixes carry out co-precipitation without precipitation.
Preferably, described active sludge biological reaction is CMAS complete mixing activated sludge technique, A/O technique, A 2one in/O technique, adsorption biodegradation, contact oxidation technology, oxidation ditch process.
Preferably, the quantity of reflux of described mud mixture is the 10%-150% of aquifer yield in active sludge biological reaction.Most preferably, the quantity of reflux of described mud mixture is the 50%-100% of aquifer yield in active sludge biological reaction.
Preferably, the reagent that described pH regulator is used is 30% (m/v) sodium hydroxide solution.
Preferably, described pH regulator is to 7.0-8.5.
The device that the present invention also openly implements the deep treatment method of described waste water is made up of active sludge biological reaction tank, coprecipitated pond, Fenton oxidation pond, alkali tune pond, final deposition pool, sludge thickener.
Preferably, alkali tune pond end is provided with mud mixture reflux line and outlet conduit, and mud mixture reflux line is provided with reflux pump, is regulated the size of mud mixture quantity of reflux by the variable frequency control of reflux pump; Mud mixture reflux line is connected with active sludge biological reaction tank drainage pipeline.
Preferably, be provided with sludge return pipe bottom coprecipitated pond, sludge return pipe is provided with sludge reflux pump, carried out the size of conditioning of mud quantity of reflux by the variable frequency control of sludge reflux pump; Sludge return pipe is connected with active sludge biological reaction tank inlet channel.
The technical process of the deep treatment method of waste water described in the invention process is:
1) sewage carries out organic degraded at active sludge biological reaction tank, and the sewage after degraded is mingled with upper strata active sludge and discharges from active sludge biological reaction tank water port;
2) step 1) in draining enter coprecipitated pond and carry out co-precipitation, mud-water separation after precipitation, upper strata water outlet is discharged from coprecipitated pond water port; Lower floor's mud part is back to active sludge biological reaction tank, and remainder drains into sludge thickener;
3) step 2) in draining enter Fenton oxidation reaction tank and carry out described Fenton oxidation process, the water outlet after process is discharged from Fenton oxidation pond water port;
4) step 3) in draining enter alkali tune pond and carry out described pH value and be adjusted to neutrality, pH value regulates the mud mixture produced to be back to active sludge biological reaction tank outlet conduit by a certain percentage without precipitation, together drain into coprecipitated pond with the draining of active sludge biological reaction tank and carry out co-precipitation, realize quick mud-water separation; The residue mud mixture that pH regulator produces is discharged from adjusting and reducing pond water outlet;
5) step 4) in draining enter final deposition pool and carry out heavy precipitation reaction at end and produce final deposition pool mud and waste water, described final deposition pool mud drains into sludge thickener, described waste water final deposition pool complete eventually heavy fall after qualified discharge.
Step 1) reaction of described active sludge biological is CMAS complete mixing activated sludge technique, A/O technique, A 2one in/O technique, adsorption biodegradation, contact oxidation technology, oxidation ditch process.By the biological degradation that active sludge biological reacts, decompose most of organism, improve effluent quality.
Step 2) described in co-precipitation, refer to coprecipitation mode conventional in existing sewage treatment area, settling tank involved by it can be the one in horizontal sedimentation tank, width sedimentation tank, tube settler, its role is to carry out gravity settling to the Slurry from active sludge biological reaction tank, realize mud-water separation; Described sludge reflux refers to, the partial sludge after precipitation is back to supplement the outflow loss of its active sludge in active sludge biological reactive system, and remainder is disposed to sludge thickener; Sludge reflux realizes in the following manner: be provided with sludge return pipe bottom coprecipitated pond, sludge return pipe is provided with sludge reflux pump, is carried out the size of conditioning of mud quantity of reflux by the variable frequency control of sludge reflux pump; Sludge return pipe is connected with active sludge biological reaction tank inlet channel.
Step 3) described in Fenton oxidation reaction, concrete operations are as follows: in Fenton oxidation pond, first add sulfuric acid to common sinking pool effluent regulate waste water ph to 3-5, then add Fenton reagent and carry out Fenton oxidation advanced treatment, difficult oxidation, hard-degraded substance in further degrading waste water.
Step 4) described in pH value regulate and refer to, in alkali tune pond, add 30% (m/v) sodium hydroxide solution regulate waste water ph to be 7.0-8.5, iron ion in waste water forms colloidalmaterial, and waste water presents mud mixture state; Described muddy water backflow refers to, above-mentioned mud mixture is just back to active sludge biological reaction tank outlet conduit without precipitation, together drains into coprecipitated pond and carry out co-precipitation, realize mud-water separation fast with bio-chemical effluent.The quantity of reflux of mud mixture is the 10%-150% that active sludge biological reflects the water yield, and preferably, the quantity of reflux of mud mixture is the 50%-100% that active sludge biological reflects the water yield; Muddy water realizes back up through with under type: alkali tune pond end is provided with mud mixture reflux line and outlet conduit, mud mixture reflux line is provided with reflux pump, regulated the size of mud mixture quantity of reflux by the variable frequency control of reflux pump, mud mixture reflux line is connected with active sludge biological reaction tank drainage pipeline.
Step 5) described in end heavy to refer to, coprecipitation mode conventional in existing sewage treatment area, final deposition pool involved by it can be the one in horizontal sedimentation tank, width sedimentation tank, tube settler, its role is to the final precipitation before sewage is discharged, use clarification of water, qualified discharge.Precipitating sludge enters sludge thickener.
The key distinction for the treatment of process of the present invention and conventional treatment process is:
Treatment process of the present invention is: sewage enters coprecipitated pond after active sludge biological reaction tank obtains degraded, sinking pool effluent enters Fenton oxidation reaction tank altogether, Fenton water outlet enters alkali tune pond, by Fenton alkali tune pond adjust ph to the neutral mud mixture produced, be back to biological reaction tank drainage pipeline by a certain percentage, mud mixture reflux line is placed in alkali tune pond, rear end, Fenton oxidation pond, is connected to biochemical reaction outlet conduit, together drains into coprecipitated pond precipitate with bio-chemical effluent; The water outlet of alkali tune pond enters qualified discharge after final deposition pool sedimentation.The mud that technique produces carries out concentrating, processed
Conventional treatment process is: sewage enters settling tank after active sludge biological reaction tank obtains degraded, settling tank water outlet enters Fenton oxidation reaction tank, Fenton water outlet enters alkali tune pond, the water outlet of alkali tune pond enters qualified discharge after final deposition pool sedimentation, and the mud that technique produces carries out concentrating, processed.
Technical solution of the present invention significantly can promote the settling velocity of biochemical sludge, reduces sinking pool effluent concentration of suspension altogether, improves outlet effect, reduce coprecipitated pond volume, reduce capital cost, reduces iron mud output, reduces cost for wastewater treatment.The present invention is simple to operate, and it is convenient to run, and can be widely used in the advanced treatment in the waste water treatment fields such as pharmacy waste water, wastewater from chemical industry, paper waste.
By extremely neutral for adjust pH after the Fenton oxidation reaction mud mixture produced in technical solution of the present invention, without precipitation just by a certain percentage to active sludge biological reaction tank outlet conduit, together drain into coprecipitated pond with the water outlet during active sludge biological reacts to precipitate,, achieve following unforeseeable effect:
1, mud mixture backflow mixes with bio-chemical effluent carries out co-precipitation, the rapid subsidence performance of mud mixture after utilizing Fenton to react, the flocculation of ferric hydroxide colloid, net is caught, and the parcel of macrobead flco, the effect such as to be mingled with, biochemical sludge and this mud mixture is impelled to form co-precipitation system, increase substantially the settling velocity of biochemical sludge, settling time shortens to the 1/12.9-1/5 of conventional sedimentation time, coprecipitated pond accessible water yield within the unit time is 5 times-12.9 times of conventional settling tank, when therefore processing the identical water yield, coprecipitated pond volume will obviously reduce, capital cost reduces.
2, mud mixture backflow to mix with bio-chemical effluent and carries out co-precipitation, significantly reduces water outlet COD and concentration of suspension, improves effluent quality, make water outlet as clear as crystal.
3, the mud mixture of backflow contains a large amount of ferric hydroxide colloid, therefore with bio-chemical effluent co-precipitation after, the degree of compactness of biochemical sludge improves, precipitation volume reduces, and be more conducive to sludge dewatering, decrease the usage quantity of sludge dehydration process Chinese medicine (as lime and PAM), and effectively reduce the iron mud output of Fenton oxidation, reduce running cost.
4, the backflow, coprecipitated of mud mixture, make to be rich in ironic hydroxide in biochemical sludge, when this part mud is back to active sludge biological reaction tank in the mode of sludge reflux, the settling property of active sludge in biological reaction tank can be promoted once again, realize benign cycle, and be conducive to producing the good high-efficiency aerobic granule sludge of water treatment effect.Simultaneously due to the throwing out of ironic hydroxide, biological tank generation sludge bulking effectively can be prevented.
5, advanced waste treatment method of the present invention, can be used for the process modification of existing use Fenton oxidation as the sewage work of advanced treatment, only need increase backflow facility and get final product lifting waste water processing power and treatment effect, save processing cost, without the need to increasing building site and treatment scale, therefore have broad application prospects.
Accompanying drawing explanation
Accompanying drawing 1 waste water conventional treatment process figure
Accompanying drawing 2 muddy water backflow co-precipitation treatment process figure
Accompanying drawing 3Fenton oxidation system structures plot plan
Accompanying drawing 4Fenton oxidation system structures front view
Embodiment:
Below will further illustrate the present invention by specific embodiment, but it should be appreciated by those skilled in the art that the specific embodiment of the invention and do not limit the present invention in any way, and take up an official post on basis of the present invention and how all fall within scope with replacement.
The simultaneous test of embodiment 1 conventional precipitation method and backflow coprecipitation method
The mud mixture produced with Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s environmental protection station biological reaction tank water outlet and Fenton oxidation system is experimental study object, test is divided into two groups, be respectively control group and test group, control group adopts conventional precipitation method, test group adopts backflow coprecipitation method of the present invention, and two groups of tests are all carried out in 1000ml graduated cylinder.Control group is got the water outlet of 1000ml biological reaction tank and is placed in 1000ml graduated cylinder natural subsidence; Test group gets a certain amount of biological reaction tank water outlet and Fenton mud mixture according to different reflux ratio, mixes and is placed on natural subsidence in 1000ml graduated cylinder; Sludge volume ratio (SV after both contrasts water outlet COD, water outlet SS, settling velocity and sedimentation 30min 30).The wherein contrast of settling velocity, with the sludge blanket thickness (H) after control group sedimentation 30min for reference, the time required when test group reaches identical mud thickness (H) is investigated in contrast.Testing data is as shown in table 1.
Table 1 settling test data synopsis
By table 1 data, can reach a conclusion as follows:
1), when mud mixture reflux ratio is 10%, test group can complete the precipitation process of control group 30min in 360s, and sedimentation time shortens to original 1/5.After test group sedimentation 30min, SV 30for 90.6% of control group.
2), when mud mixture reflux ratio is 50%, test group can complete the precipitation process of control group 30min in 200s, and sedimentation time shortens to original 1/9.After test group sedimentation 30min, SV 30for 71.9% of control group.
3), when mud mixture reflux ratio is 100%, test group can complete the precipitation process of control group 30min in 150s, and sedimentation time shortens to original 1/12.After test group sedimentation 30min, SV 30for 57.8% of control group.
4), when mud mixture reflux ratio is 150%, test group can complete the precipitation process of control group 30min in 140s, and sedimentation time shortens to original 1/12.9.After test group sedimentation 30min, SV 30for 53.1% of control group.
Consider mud mixture return flow, backflow energy consumption, cosedimentation time, coprecipitated pond volume and wastewater treatment total cost, the optimum reflux ratio of mud mixture is 50%-100%.
Although the present invention increases the wastewater treatment water yield due to the backflow of mud mixture, the process water yield becomes the 1.5-2.0 of original treatment capacity doubly, but due to the fast lifting of sedimentation time, sedimentation time is reduced to the 1/12.9-1/5 of former sedimentation time, so wastewater treatment capacity is 5-12.9 times of former treatment capacity in the unit time of coprecipitated pond.Visible, processing efficiency obviously promotes, and significantly can reduce coprecipitated pond volume when processing the identical water yield.
The pilot plant test of example 2 the method for the invention Pharmaceutical Wastewater Treatment
With Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s pharmacy waste water after anaerobic treatment water outlet for subjects, test is divided into two groups, be respectively control group and test group, control group employing " biological respinse+precipitation+Fenton oxidation+end sinks " treatment process, test group adopts " biological respinse+co-precipitation+Fenton oxidation+muddy water backflow+heavy eventually " of the present invention treatment process, and wherein test group adopts 100% reflux ratio.Contrast sludge volume ratio (SV after two kinds of Process for Effluent COD, water outlet SS, settling velocity and sedimentation 30min 30).The contrast of settling velocity, with the sludge blanket thickness (H) after control group sedimentation 30min for reference, the time required when test group reaches identical mud thickness (H) is investigated in contrast.Testing data is in table 2 and table 3.
Table 2 settling test data synopsis
Test grouping Settling time COD(mg/L) SS(mg/L) SV 30
Control group 30min 120 46 33.5％
Test group 145s 80 29 19.0％
Table 3 each processing unit effluent quality table
By table 2, table 3 data, can reach a conclusion as follows:
1) when mud mixture reflux ratio is 100%, test group can complete the precipitation process of control group 30min in 145s, reach identical precipitating sludge layer thickness, the sedimentation time of test group is 1/12.4 of control group, and the coprecipitated pond reduction in bulk namely processing the identical water yield is 1/12.4 of original size; And 12.4 times that the water yield is control group in the coprecipitated pond unit time of same size, can be processed.After sedimentation 30min, the SV of test group 30for 56.7% of control group.
2) water outlet COD and SS manages unit throughout all obvious reduction.Control group final deposition pool water outlet COD and SS is respectively 43mg/L and 13mg/L; Test group final deposition pool water outlet COD and SS is respectively 32mg/L and 8mg/L, and processing efficiency promotes 25.6% and 38.5% respectively on former control group basis.
The pilot plant test of example 3 the method for the invention process chemical production wastewater
With Shandong Treatment of Sewage Reservoir of Chemical Plant treatment station anaerobic effluent for subjects, test is divided into two groups, be respectively control group and test group, control group employing " biological respinse+precipitation+Fenton oxidation+end sinks " treatment process, test group adopts " biological respinse+co-precipitation+Fenton oxidation+muddy water backflow+heavy eventually " of the present invention treatment process, and wherein test group adopts 80% reflux ratio.After contrasting water outlet COD, the water outlet SS of two kinds of techniques, settling velocity and sedimentation 30min, sludge volume compares SV 30.The contrast of settling velocity, with the sludge blanket thickness (H) after control group sedimentation 30min for reference, the time required when test group reaches identical sludge blanket thickness (H) is investigated in contrast.Testing data is in table 4 and table 5.
Table 4 coprecipitated pond settling test data synopsis
Test grouping Settling time COD(mg/L) SS(mg/L) SV 30
Control group 30min 120 50 33％
Test group 170s 85 30 21％
Table 5 each processing unit effluent quality table
By table 4, table 5 data, can reach a conclusion as follows:
1) when mud mixture reflux ratio is 80%, test group can complete the precipitation process of control group 30min in 170s, reach identical precipitating sludge layer thickness, the sedimentation time of test group is 1/10.6 of control group, and the coprecipitated pond reduction in bulk namely processing the identical water yield is 1/10.6 of original size; And 10.6 times that the water yield is control group in the coprecipitated pond unit time of same size, can be processed.After sedimentation 30min, the SV of test group 30for control group 63.6%.
2) water outlet COD and SS manages unit throughout all obvious reduction.Control group final deposition pool water outlet COD and SS is respectively 47mg/L and 16mg/L; Test group final deposition pool water outlet COD and SS is respectively 39mg/L and 8mg/L, and processing efficiency promotes 17.0% and 50% respectively on former control group basis.
The pilot plant test of example 4 the method for the invention Processing Paper Wastewater
With Shandong papermaking enterprise sewage works anaerobic effluent for subjects, test is divided into two groups, be respectively control group and test group, control group employing " biological respinse+precipitation+Fenton oxidation+end sinks " treatment process, test group adopts " biological respinse+co-precipitation+Fenton oxidation+muddy water backflow+heavy eventually " of the present invention treatment process, and wherein test group adopts 50% reflux ratio.Sludge volume ratio after contrast water outlet COD, the water outlet SS of two kinds of techniques, settling velocity and sedimentation 30min.The contrast of settling velocity, with the sludge blanket thickness (H) after control group sedimentation 30min for reference, the time required when test group reaches identical sludge blanket thickness (H) is investigated in contrast.Testing data is in table 6 and table 7.
Table 6 coprecipitated pond settling test data synopsis
Test grouping Settling time COD(mg/L) SS(mg/L) SV 30
Control group 30min 106 44 32.5％
Test group 195s 78 28 22.5％
Table 7 each processing unit effluent quality table
By table 6, table 7 data, can reach a conclusion as follows:
1) when mud mixture reflux ratio is 50%, test group can complete the precipitation process of control group 30min in 195s, reach identical precipitating sludge layer thickness, the sedimentation time of test group is 1/9.2 of control group, and the coprecipitated pond reduction in bulk namely processing the identical water yield is 1/9.2 of original size; And can to process the water yield in the coprecipitated pond unit time of same size be original 9.2 times.After sedimentation 30min, the SV of test group 30for control group 69.2%.
2) water outlet COD and SS manages unit throughout all obvious reduction.Control group final deposition pool water outlet COD and SS is respectively 41mg/L and 15mg/L; Test group final deposition pool water outlet COD and SS is respectively 28mg/L and 9mg/L, and processing efficiency promotes 31.7% and 40% respectively on former control group basis.

Claims (9)

1. the deep treatment method of a waste water, comprise active sludge biological reaction, co-precipitation and sludge reflux, Fenton oxidation, pH regulator and mud mixture backflow, whole mattress sinking water, it is characterized in that, the mud mixture that after Fenton reaction, pH regulator produces carries out co-precipitation without precipitating just to carry out being back to after the water outlet of reacting with active sludge biological in co-precipitation mixes.
2. the deep treatment method of waste water according to claim 1, is characterized in that, described active sludge biological reaction is CMAS complete mixing activated sludge technique, A/O technique, A 2one in/O technique, adsorption biodegradation, contact oxidation technology, oxidation ditch process.
3. the deep treatment method of waste water according to claim 1, is characterized in that, the quantity of reflux of described mud mixture is the 10%-150% of aquifer yield in active sludge biological reaction.
4. the deep treatment method of waste water according to claim 3, is characterized in that, the quantity of reflux of described mud mixture is the 50%-100% of aquifer yield in active sludge biological reaction.
5. according to the deep treatment method of the arbitrary described waste water of claim 1-4, it is characterized in that, described pH regulator reagent used is 30% (m/v) sodium hydroxide solution.
6. the deep treatment method of waste water according to claim 5, is characterized in that, described pH regulator is to 7.0-8.5.
7. the deep treatment method of waste water according to claim 1, is characterized in that, the device implementing the deep treatment method of described waste water is made up of active sludge biological reaction tank, coprecipitated pond, Fenton oxidation pond, alkali tune pond, final deposition pool, sludge thickener.
8. the deep treatment method of waste water according to claim 7, it is characterized in that, alkali tune pond end is provided with mud mixture reflux line and outlet conduit, and mud mixture reflux line is provided with reflux pump, is regulated the size of mud mixture quantity of reflux by the variable frequency control of reflux pump; Mud mixture reflux line is connected with active sludge biological reaction tank drainage pipeline.
9. the deep treatment method of waste water according to claim 7, is characterized in that, is provided with sludge return pipe, sludge return pipe is provided with sludge reflux pump bottom coprecipitated pond, is carried out the size of conditioning of mud quantity of reflux by the variable frequency control of sludge reflux pump; Sludge return pipe is connected with active sludge biological reaction tank inlet channel.
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CN111359610A (en) * 2020-04-09 2020-07-03 中国矿业大学 Preparation and application of multi-stage pore-low-valence iron Fenton sludge-based heterogeneous catalyst
CN114667271A (en) * 2019-11-25 2022-06-24 凯米拉公司 Method for treating waste water

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CN107804933A (en) * 2017-11-24 2018-03-16 广州益方田园环保股份有限公司 One kind is containing hypophosphites, phosphite sewage treatment equipment
CN110526517A (en) * 2019-09-20 2019-12-03 重庆杰润科技有限公司 A kind of medical intermediate production waste water treatment process
CN114667271A (en) * 2019-11-25 2022-06-24 凯米拉公司 Method for treating waste water
CN111359610A (en) * 2020-04-09 2020-07-03 中国矿业大学 Preparation and application of multi-stage pore-low-valence iron Fenton sludge-based heterogeneous catalyst

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