CN103241902B - A kind of biological treatment of waste water and biological treatment system using the technique - Google Patents
A kind of biological treatment of waste water and biological treatment system using the technique Download PDFInfo
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- CN103241902B CN103241902B CN201310190092.XA CN201310190092A CN103241902B CN 103241902 B CN103241902 B CN 103241902B CN 201310190092 A CN201310190092 A CN 201310190092A CN 103241902 B CN103241902 B CN 103241902B
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Abstract
The invention discloses a kind of biological treatment of waste water, enter aerobic unit after the preprocessed unit of waste water, Aerobic Process for Treatment is carried out to waste water under the first adsorbent and activated sludge effect；The mixture of activated sludge and the first adsorbent is obtained after Aerobic Process for Treatment, the mixture is back to the pretreatment unit and is pre-processed to waste water as the adsorbent of pretreatment unit, and the mass concentration of the first adsorbent described in aerobic unit is 50mg/L to 2000mg/L；The present invention also provides a kind of biological treatment systems of industrial wastewater, including pretreatment unit and biochemical treatment unit, the pretreatment unit includes adsorption tank, the biochemical treatment unit includes aerobic tank, the first adsorbent is added in the aerobic tank, the mixture of first adsorbent and the activated sludge in aerobic tank is back to adsorption tank.The biological treatment and system adsorbent amount of industrial wastewater of the present invention are few, processing cost is low, technological process is simple, floor space is small, and operational management is simple.
Description
Technical field
The present invention relates to a kind of waste water treatment process, and in particular to the biological treatment of a kind of industrial wastewater and using should
The biological treatment system of technique, belongs to sewage treatment field.
Background technology
Industrial wastewater refers to the waste water, sewage and waste liquid generated in industrial processes, wherein containing the work outflowed with water
The pollutant generated in industry production materials, intermediate product and product and production process.With industry rapid development, waste water
Type and quantity rapidly increase, also increasingly extensively and serious to the pollution of water body, threaten the health and safety of the mankind.Therefore, right
For environmental protection, the processing of industrial wastewater is more even more important than the processing of municipal sewage.
In the prior art, Chinese patent literature CN1454852A is disclosed at a kind of Zeolite-bio combined adsorption regenerative sewage
Science and engineering skill, the technique are related to the removal and processing of the organic matter and ammonia nitrogen of municipal sewage, sanitary sewage and industrial organic waste water；It should
Technique realizes that the core cell of processing is adsorption tank to waste water, by adsorption tank Zeolite Addition or zeolite powder, by certain
Time culture domestication forms zeolite or zeolite powder sludge, using the physics of high concentration and highly active zeolite or zeolite powder sludge, changes
It learns, the synergistic effect of biology, pollutant is adsorbed in adsorption tank, the waste water through adsorption treatment realizes solid-liquid point in sedimentation basin
From, water outlet can qualified discharge, and adsorbent reuse again after regeneration treatment that adsorption tank is added.But the sewage
Treatment process is handled commonly used in the water outlet guarantee of low concentration sewage；Moreover, recorded according to document specific implementation mode, on
The processing that sewage treatment process is suitable for the sewage of low concentration that influent COD is 150mg/L, ammonia nitrogen is 30mg/L or so is stated, even if
It is that the sewage of processing so low COD level needs the amount of Zeolite Addition or zeolite powder to be to realize that standard water discharge is discharged
5000mg/L。
In actual industrial environment, high-concentration industrial-waters of the common COD at concentrations up to 3000-5000mg/L, if adopted
It, can not be by wastewater treatment to qualified discharge with the process route described in the patent document；It is that 3000mg/L is with influent COD
Example, in the case that the conditions such as initial COD Pressure, Concentration, Temperatures are certain, the adsorption capacity of zeolite is definite value, and primary adsorption is passed through in water inlet
After processing, it is assumed that it is discharged COD and reaches 2500mg/L, due to the limitation of adsorption equilibrium, even if continuing to add into adsorption tank new
Adsorbent, water outlet COD will not decline again；In addition, it is assumed that using multi-stage absorption（Multiple adsorption tanks are used in conjunction）It is handled, is passed through
It crosses 3000mg/L when COD is by intaking after primary adsorption and is reduced to 2500mg/L, then through secondary absorption（At second adsorption tank
Reason）COD is reduced to 2000mg/L by 2500mg/L afterwards, successively after the processing such as three-level, level Four, water outlet again by 2000mg/L successively
It is reduced to 1600mg/L, 1300mg/L, it is desirable to which qualified discharge then needs that multiple adsorption tanks, and the situation that other conditions are identical is used in conjunction
Under, initial COD concentration is lower, and the adsorption capacity of adsorbent is lower, the degree of convergence that the water outlet COD by every grade of processing declines in the backward
Smaller, not only floor space increases for this, and the dosage of adsorbent is also countless.
In addition, carrying out bio-regeneration to zeolite or zeolite powder using microorganism, operating cost is higher, this is because by
The zeolite or zeolite powder sludge that sedimentation basin is isolated are heavier to the transporting equipments abrasion such as pipeline and pump based on inorganic matter zeolite,
Therefore very high, the easy investment that increases equipment and maintenance cost, therefore, above-mentioned waste water are required transporting equipments materials such as pump and pipelines
Treatment process is to pollutant concentration height, and toxicity is big, the industry such as coal chemical industrial waste water, pharmacy waste water, dyeing waste water of biodegradability difference
Waste water is simultaneously not suitable for.
In general, useless to pollutant concentration height, the coal chemical industrial waste water that toxicity is big, biodegradability is poor, pharmacy waste water, printing and dyeing
The industrial wastewaters such as water, common treatment process can be divided into pretreatment, biochemical treatment and post-processing three parts, but in industrial wastewater
The toxic percussion of activated Sludge System is held containing toxic pollutants such as high concentration phenols organic pollution, cyanogen pollutants
The problems such as easily causing sludge bulking, and general secondary biochemical effluent COD and ammonia nitrogen are difficult up to standard, need to carry out advanced treating, packet
Include electrochemical process, coagulant sedimentation, advanced oxidation processes, membrane separation process and absorption method etc..
Chinese patent literature CN101560045A discloses a kind of coal chemical wastewater treating technique, including by coal chemical industrial waste water
It is pre-processed by air-floating apparatus, pretreated waste water, which is added, in Fenton reagent carries out after-treatment, by after-treatment
Waste water afterwards is added activated carbon end in pond and carries out advanced treating by activated sludge aeration tank, will be useless after advanced treating
Water is detached by ultrafiltration membrane, the recycle-water after being detached, then reverse osmosis by the progress of selective semi-permeable membrane, obtains reverse osmosis
Recycle-water after thoroughly is evaporated the processing completed after crystallization to waste water.The technical solution is added in activated sludge aeration tank
Activated carbon powder adsorbs the organic matter and dissolved oxygen in waste water, but Fenton reagent, activated carbon, ultrafiltration using active powdered carbon
Film, reverse osmosis membrane price are high, and it is short just to change the period, causes processing cost to greatly increase, and technological process is long, takes up a large area, and transports
Row complex management, pretreated Fenton oxidation complex operation, the ultrafiltration of advanced treating, reverse osmosis membrane assembly need frequent
Cleaning and replacement cause operational management inconvenient.
Invention content
It is useless to be unsuitable for high concentration organic industry greatly for adsorbent amount in solution in the prior art During Industrial Wastewater Treatment Process
The problem of water process or Industrial Wastewater Treatment cost are big, and technological process is long, takes up a large area, the problem of operational management complexity, into
And providing that a kind of adsorbent amount is few, processing cost is low, technological process is simple, floor space is small, operational management is simply industrial
The biological treatment system of waste water.
For this purpose, the technical solution that the present invention takes is：
A kind of biological treatment of waste water, includes the following steps：Enter aerobic unit after the preprocessed unit of waste water,
Aerobic Process for Treatment is carried out to waste water under first adsorbent and activated sludge effect；Activated sludge and first is obtained after Aerobic Process for Treatment to inhale
Attached dose of mixture, the mixture are back to the pretreatment unit and are carried out in advance to waste water as the adsorbent of pretreatment unit
Processing.
In the biological treatment of above-mentioned waste water, the mass concentration of the first adsorbent described in aerobic unit is 50mg/L
To 2000mg/L.
In the biological treatment of above-mentioned waste water, first adsorbent be activated coke, semicoke and lignite in one kind or
It is several.
Further include hydrolysis acidification processing in the biological treatment of above-mentioned waste water, waste water after pretreatment carries out first
Hydrolysis acidification processing enters back into aerobic unit and carries out Aerobic Process for Treatment.
Further include anoxic treatment in the biological treatment of above-mentioned waste water, waste water after pretreatment is hydrolyzed successively
Acidification, anoxic treatment enter back into aerobic unit and carry out Aerobic Process for Treatment.
In the biological treatment of above-mentioned waste water, the aerobic unit includes aerobic thermopnore, ordinary activated sludge aeration
The floated activated sludge reactors such as pond, sbr reactor pond, the aeration tanks CASS or oxidation ditch.
The present invention also provides a kind of biological treatment system of waste water, including pretreatment unit and biochemical treatment unit, institutes
It includes adsorption tank to state pretreatment unit, and the biochemical treatment unit includes aerobic tank, and the first absorption has been added in the aerobic tank
Agent, wherein the mixture of first adsorbent and the activated sludge in aerobic tank is back to absorption of the adsorption tank as adsorption tank
Agent carries out adsorption treatment to waste water.
In the biological treatment system of above-mentioned waste water, first adsorbent be activated coke, semicoke and lignite in one kind or
Several, the mass concentration of the first adsorbent described in aerobic tank is 50mg/L to 2000mg/L.
The biological treatment system of above-mentioned waste water further includes hydrolysis acidification pool, the adsorption tank, the hydrolysis acidification pool and institute
Aerobic tank is stated to be sequentially connected along water (flow) direction.
The biological treatment system of above-mentioned waste water further includes anoxic pond, the adsorption tank, the hydrolysis acidification pool, the anoxic
Pond is sequentially connected with the aerobic tank along water (flow) direction.
In the biological treatment system of above-mentioned waste water, the aerobic tank preferably oxygen flow bed, ordinary activated sludge aeration tank,
The floated activated sludge reactors such as sbr reactor pond, the aeration tanks CASS or oxidation ditch.
Compared with prior art, the invention has the advantages that：
（1）Waste water treatment process and biological treatment of waste water system of the present invention, the excess sludge that aerobic unit is discharged
Pretreatment stage is flowed back into the mixture of the first adsorbent, and adsorption treatment is carried out to high-concentration industrial raw water as adsorbent.It is good
Oxygen unit discharge mixing sludge agglomerated using the first adsorbent as core to be formed compact, closely knit efficient zoogloea, in raw water
Macromolecule contaminant and toxic pollutant carry out flocculation sediment, reduce to the maximum extent toxicant in industrial raw water with it is big
Influence of the molecule hard-degraded substance to subsequent biochemical system, saves the dosage of the first adsorbent in entire process treatment process,
Reduce operating cost.
（2）Biological process of wastewater treatment and biological treatment of waste water system of the present invention, add suction in aerobic unit
Attached dose, the removal effect of conventional activated sludge process is enhanced, adsorbent first forms biology as microorganism carrier on surface
Film realizes microorganism retention, increases the effective microbe concentration in reactor；Secondly attachment biomembrane from inside to outside according to
It is secondary for anaerobism, anoxic, aerobic microbiological, macromolecular substances that can be difficult to degrade to adsorbent common aerobic microbiological into
Row classification degradation, while also corresponding to extend the time of contact of microorganism and pollutant；In addition adsorbent is solidifying as zoogloea
Poly- core, formation compact, closely knit efficient zoogloea, increase microbial activity and concentration, the degradation energy of enhancement microbiological
Power；The excess sludge of aerobic tank discharge and the mixed-liquor return of adsorbent carry out high-concentration industrial raw water to front end adsorption tank
Absorption, waste water enters biochemical system and is handled after absorption, mixing sludge discharge system after coagulating sedimentation.Aerobic tank is discharged
Mixing sludge exist in the form of zoogloea, have good flocculability, can wad a quilt with cotton to the macromolecule contaminant in raw water
Retrogradation is formed sediment, and biological flocculant is played the role of；The mixture of adsorbent and activated sludge that aerobic tank bottom is discharged is flowed back
Compared with directly adding adsorbent into adsorption tank, adsorbent amount is greatly reduced, has saved operating cost, and make full use of
The absorption and coagulation effect of mixture reduces the toxicant in industrial raw water with macromolecular hard-degraded substance to rear to the maximum extent
The influence of continuous biochemical system.
（3）Biological process of wastewater treatment and biological treatment of waste water system of the present invention, the first absorption in aerobic unit
The mass concentration of agent is 50mg/L to 2000mg/L, that is, the mass ratio for entering the waste water and the first adsorbent of aerobic unit is
20000:1 to 500:1.So that the adsorbent in aerobic tank is effectively combined with activated sludge, avoids that adsorbent dosage occurs
It is very little to make that the activated sludge suspension amount in reactor is too many or adsorbent dosage causes adsorbent to occur in reactor too much
The phenomenon that precipitation.
（4）The adsorbents such as activated coke, semicoke, lignite are cheap, mesoporous is flourishing, can effectively absorb big in industrial wastewater
Molecule hard-degraded substance and noxious material reduce industrial wastewater toxicity, improve the biodegradability of waste water, are created for subsequent biological treatment
Make good condition.
（5）Biological process of wastewater treatment and biological treatment of waste water system of the present invention further include hydrolysis acidification processing,
Larger molecular organics are converted to small organic molecule, improve the biodegradability of waste water.
Description of the drawings
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is a kind of particular flow sheet of industrial wastewater biological treatment of the present invention；
Fig. 2 is the particular flow sheet of another industrial wastewater biological treatment of the present invention；
Fig. 3 is the particular flow sheet of 1 water treatment technology of comparative example of the present invention；
Fig. 4 is the particular flow sheet of 2 water treatment technology of comparative example of the present invention；
Fig. 5 is the particular flow sheet of 3 water treatment technology of comparative example of the present invention.
Specific implementation mode
Embodiment 1
It is as shown in Figure 1 a kind of flow chart of specific implementation mode of industrial wastewater biological treatment system of the present invention,（1）Work
Industry waste water first passes around adsorption tank, removes macromolecular hardly degraded organic substance and toxicant in waste water, reduces to subsequent biochemical
The impact of system and toxicity inhibition, the mixture for the excess sludge and activated coke that the adsorbent used flows back for aerobic tank.（2）
Waste water after adsorption treatment enters biochemical system, in the present embodiment the waste water successively pass through hydrolysis acidification pool, anoxic pond,
Aerobic tank carries out biological treatment.Activated coke is added into aerobic tank, strengthens degradability of the aerobic microbiological to the Organic substance in water that gives up
Can, ensure stable effluent quality qualified discharge, the mass concentration of adsorbent is 100mg/L wherein in aerobic tank（I.e. in aerobic tank
The mass ratio of waste water and adsorbent is 10000：1）.Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation in aerobic tank, wherein
It is 2 that the aerobic tank, which is back to the ratio between the backflow water yield of the anoxic pond and the inflow of the anoxic pond,：1, excess sludge with
The mixture of adsorbent all flows back into adsorption tank and is adsorbed to industrial raw water, the mixing sludge coagulating sedimentation heel row after absorption
Go out system.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is to be thoroughly mixed formula activated sludge tank, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L are discharged COD after processing<80mg/L, ammonia nitrogen<5mg/
L, total nitrogen<30mg/L.Its COD removal rate >=95%, ammonia nitrogen removal frank >=97%, nitrogen removal rate >=80%.Water outlet reaches《Cycle
Cooling water Standard of reclaimed water》In corresponding requirements.
Embodiment 2
The technological process of the present embodiment is identical as technological process shown in FIG. 1,（1）Industrial wastewater first passes around adsorption tank,
The macromolecular hardly degraded organic substance and toxicant in waste water are removed, the impact to subsequent biochemical system and toxicity inhibition are reduced
Property, the mixture for the work excess sludge and activated coke that the adsorbent used flows back for aerobic tank.（2）Waste water after adsorption treatment
Into biochemical system, the waste water passes through hydrolysis acidification pool, anoxic pond, aerobic tank and carries out at biology successively in the present embodiment
Reason adds activated coke into aerobic tank, strengthens degradation property of the aerobic microbiological to the Organic substance in water that gives up, ensures that effluent quality is steady
Determine qualified discharge, the mass concentration of adsorbent is 50mg/L wherein in aerobic tank（That is, waste water and adsorbent in aerobic tank
Mass ratio be 20000：1）, industrial wastewater inlet COD concentration is 2000-3000mg/L.Nitrification liquid flows back into scarce in aerobic tank
Oxygen pond carries out denitrification denitrogenation, wherein the aerobic tank is back to the water inlet of the backflow water yield and the anoxic pond of the anoxic pond
The ratio between amount is 2：The mixture of 1 excess sludge and adsorbent all flows back into adsorption tank and is adsorbed to industrial raw water, after absorption
Mixing sludge coagulating sedimentation after discharge system.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is gallery type activated sludge tank, and influent COD is
2000-3000mg/L, ammonia nitrogen 50-150mg/L, total nitrogen 100-200mg/L are discharged COD after processing<80mg/L, ammonia nitrogen<5mg/
L, total nitrogen<30mg/L.Its COD removal rate >=95%, ammonia nitrogen removal frank >=97%, nitrogen removal rate >=80%.Water outlet reaches《Cycle
Cooling water Standard of reclaimed water》In corresponding requirements.
Embodiment 3
As shown in Fig. 2,（1）Industrial wastewater first passes around adsorption tank, remove macromolecular hardly degraded organic substance in waste water and
Toxicant reduces the impact to subsequent biochemical system and toxicity inhibition, the residue that the adsorbent used flows back for aerobic tank
The mixture of sludge and lignite.（2）Waste water after adsorption treatment enters AO systems, i.e., waste water passes through anoxic pond, aerobic successively
Pond carries out biological treatment.Lignite is added into aerobic tank, is strengthened aerobic microbiological to the degradation property for the Organic substance in water that gives up, is ensured
Stable effluent quality qualified discharge, the mass concentration of adsorbent is 2000mg/L wherein in aerobic tank（That is, in aerobic tank
The mass ratio of waste water and adsorbent is 500：1）.Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation, wherein institute in aerobic tank
It is 2 to state aerobic tank and be back to the ratio between the backflow water yield of the anoxic pond and the inflow of the anoxic pond：1, excess sludge with inhale
Attached dose of mixture all flows back into adsorption tank and is adsorbed to industrial raw water, is discharged after the mixing sludge coagulating sedimentation after absorption
System.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is to be thoroughly mixed formula activated sludge tank, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L are discharged COD after processing<80mg/L, ammonia nitrogen<5mg/
L, total nitrogen<30mg/L.Its COD removal rate >=95%, ammonia nitrogen removal frank >=97%, nitrogen removal rate >=80%.Water outlet reaches《Cycle
Cooling water Standard of reclaimed water》In corresponding requirements.
Embodiment 4
（1）Industrial wastewater first passes around adsorption tank, removes macromolecular hardly degraded organic substance and toxicant in waste water, subtracts
Few impact and toxicity inhibition to subsequent biochemical system, excess sludge that the adsorbent used flows back for aerobic tank and semicoke
Mixture.（2）Waste water after adsorption treatment enters biochemical system, and the waste water passes through hydrolysis acidification successively in the present embodiment
Pond, anoxic pond, aerobic tank carry out biological treatment.Semicoke is added into aerobic tank, strengthens aerobic microbiological to the Organic substance in water that gives up
Degradation property, ensure stable effluent quality qualified discharge, wherein in aerobic tank the mass concentration of adsorbent be 1g/L（It is i.e. aerobic
The mass ratio of waste water and adsorbent is 1000 in pond：1）.Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation in aerobic tank,
Described in aerobic tank be back to the ratio between the backflow water yield of the anoxic pond and the inflow of the anoxic pond be 2：1, excess sludge
Adsorption tank is all flowed back into the mixture of adsorbent to adsorb industrial raw water, after the mixing sludge coagulating sedimentation after absorption
Discharge system.
Aerobic tank is oxidation ditch in the present embodiment, and the anoxic pond is plug-flow type active sludge pond, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L are discharged COD after processing<80mg/L, ammonia nitrogen<5mg/
L, total nitrogen<30mg/L, water outlet reach《Recirculated cooling water Standard of reclaimed water》In corresponding requirements.
Embodiment 5
（1）Industrial wastewater first passes around adsorption tank, removes macromolecular hardly degraded organic substance and toxicant in waste water, subtracts
Few impact and toxicity inhibition to subsequent biochemical system, the active excess sludge that the adsorbent used flows back for aerobic tank with it is brown
The mixture of coal.（2）Waste water after adsorption treatment enters biochemical system, and the waste water is successively by hydrolysis in the present embodiment
Acidification pool, anoxic pond, aerobic tank carry out biological treatment.Lignite is added into aerobic tank, strengthens aerobic microbiological to having in waste water
The degradation property of machine object ensures stable effluent quality qualified discharge, and the mass concentration of adsorbent is 1.2g/L wherein in aerobic tank.
Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation in aerobic tank, wherein the aerobic tank is back to the reflux of the anoxic pond
The ratio between water and the inflow of the anoxic pond are 2：1, the mixture of excess sludge and adsorbent all flows back into adsorption tank pair
Industrial raw water is adsorbed, discharge system after the mixing sludge coagulating sedimentation after absorption.
Aerobic tank is ordinary activated sludge aeration tank in the present embodiment, and the anoxic pond is plug-flow type active sludge pond,
Influent COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, and total nitrogen 100-300mg/L is discharged COD after processing<80mg/L、
Ammonia nitrogen<5mg/L, total nitrogen<30mg/L.Water outlet reaches《Recirculated cooling water Standard of reclaimed water》In corresponding requirements.
Comparative example 1
As shown in figure 3,（1）Industrial wastewater first passes around adsorption tank, and the adsorbent used is activated coke, wherein in adsorption tank
The mass concentration of adsorbent is 10g/L（That is, the mass ratio of waste water and adsorbent is 100 in aerobic tank：1）, remove waste water
In macromolecular hardly degraded organic substance and toxicant, discharge system after the mixing sludge coagulating sedimentation after absorption.（2）Through absorption
Treated, and waste water enters biochemical system, and the waste water passes through hydrolysis acidification pool, anoxic pond, aerobic tank successively in the present embodiment
Carry out biological treatment.Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation in aerobic tank, wherein the aerobic tank is back to institute
It is 2 to state the ratio between the backflow water yield of anoxic pond and the inflow of the anoxic pond：1, activated sludge is by aerobic tank bottom of pond in aerobic tank
Discharge.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is to be thoroughly mixed formula activated sludge tank, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L are discharged COD after processing>200mg/L, ammonia nitrogen>
30mg/L, total nitrogen>60mg/L.
Comparative example 2
As shown in figure 4,（1）Industrial wastewater first passes around adsorption tank, remove macromolecular hardly degraded organic substance in waste water and
Toxicant reduces impact to subsequent biochemical system and toxicity inhibition, and the adsorbent used is activated coke, wherein adsorption tank
The mass concentration of interior adsorbent is 8g/L（（The mass ratio of waste water and adsorbent is 125 i.e. in adsorption tank：1））, mixed after absorption
Discharge system after conjunction sludge coagulating sedimentation.（2）Waste water after adsorption treatment enters biochemical system, described in the present embodiment useless
Water passes through hydrolysis acidification pool, anoxic pond, aerobic tank and carries out biological treatment successively.Activated coke is added into aerobic tank, is strengthened aerobic
Microorganism is to the degradation property for the Organic substance in water that gives up, and the mass concentration of adsorbent is 100mg/L wherein in aerobic tank（That is aerobic tank
The mass ratio of interior waste water and adsorbent is 10000：1）.Nitrification liquid flows back into anoxic pond and carries out denitrification denitrogenation in aerobic tank,
Described in aerobic tank be back to the ratio between the backflow water yield of the anoxic pond and the inflow of the anoxic pond be 2：1.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is to be thoroughly mixed formula activated sludge tank, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L are discharged COD after processing<80mg/L, ammonia nitrogen<5mg/
L, total nitrogen<30mg/L.Water outlet reaches《Recirculated cooling water Standard of reclaimed water》In corresponding requirements.
Comparative example 3
As shown in figure 5,（1）Industrial wastewater, which first passes around hydrolysis acidification pool, larger molecular organics are converted to small molecule has
Machine object improves the biodegradability of waste water, and the waste water through hydrolysis acidification sequentially enters anoxic pond again, aerobic tank carries out biological treatment.
Activated coke is wherein added into aerobic tank, is strengthened aerobic microbiological to the degradation property for the Organic substance in water that gives up, is ensured effluent quality
Stably reaching standard discharges, and the mass concentration of adsorbent is 100mg/L wherein in aerobic tank（The matter of waste water and adsorbent i.e. in aerobic tank
Amount is than being 10000：1）.By aerobic tank bottom of pond discharge system after mixing sludge coagulating sedimentation in aerobic tank.Nitrification liquid in aerobic tank
It flows back into anoxic pond and carries out denitrification denitrogenation, wherein the aerobic tank is back to the backflow water yield of the anoxic pond and the anoxic
The ratio between the inflow in pond is 2：1.
Aerobic tank is thermopnore in the present embodiment, and the anoxic pond is to be thoroughly mixed formula activated sludge tank, and influent COD is
3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, index of intaking in the present embodiment is the same as embodiment 1, warp
COD is discharged after processing>150mg/L, ammonia nitrogen>5mg/L, total nitrogen>30mg/L.
It can be gone out later by embodiment 1 and the comparison of comparative example 1 and comparative example 2, under identical main technique, add absorption
The position of agent is different, and the mode of spoil disposal is different, and the dosage of adsorbent is entirely different under identical flow condition.Using to institute
It states aerobic tank and has added adsorbent, the mixture of the adsorbent and activated sludge that are discharged from aerobic tank is back to adsorption tank, adsorbs
The mixture for the adsorbent and activated sludge that pond precipitation generates is discharged by adsorption tank bottom of pond, and the dosage of adsorbent is greatly saved.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (11)
1. a kind of biological treatment of waste water, includes the following steps：
Enter aerobic unit after the preprocessed unit of waste water, waste water is carried out under the first adsorbent and activated sludge effect aerobic
Processing；
The mixture of activated sludge and the first adsorbent is obtained after Aerobic Process for Treatment, it is single that the mixture is back to the pretreatment
Member pre-processes waste water as the adsorbent of pretreatment unit.
2. the biological treatment of waste water according to claim 1, which is characterized in that first inhales described in aerobic unit
Attached dose of mass concentration is 50mg/L to 2000mg/L.
3. the biological treatment of waste water according to claim 1 or 2, which is characterized in that first adsorbent is to live
Property one or more of burnt, semicoke and lignite.
4. the biological treatment of waste water according to claim 3, which is characterized in that further include hydrolysis acidification processing, warp
Acidification is hydrolyzed in pretreated waste water first, enters back into aerobic unit and carries out Aerobic Process for Treatment.
5. the biological treatment of waste water according to claim 4, which is characterized in that further include anoxic treatment, through locating in advance
Acidification, anoxic treatment is hydrolyzed in waste water after reason successively, enters back into aerobic unit and carries out Aerobic Process for Treatment.
6. the biological treatment of waste water according to claim 5, which is characterized in that the aerobic unit includes aerobic stream
Dynamic bed, ordinary activated sludge aeration tank, sbr reactor pond, the aeration tanks CASS or oxidation ditch.
7. a kind of biological treatment system of waste water, including pretreatment unit and biochemical treatment unit, the pretreatment unit include
Adsorption tank, the biochemical treatment unit includes aerobic tank, and the first adsorbent has been added in the aerobic tank, which is characterized in that
The mixture of first adsorbent and the activated sludge in aerobic tank is back to adsorbent of the adsorption tank as adsorption tank
Adsorption treatment is carried out to waste water.
8. the biological treatment system of waste water according to claim 7, which is characterized in that first adsorbent is activity
One or more of burnt, semicoke and lignite, the mass concentration of the first adsorbent described in aerobic tank be 50mg/L extremely
2000mg/L。
9. the biological treatment system of waste water according to claim 7 or 8, which is characterized in that further include hydrolysis acidification pool, institute
Adsorption tank, the hydrolysis acidification pool and the aerobic tank is stated to be sequentially connected along water (flow) direction.
10. the biological treatment system of waste water according to claim 9, which is characterized in that the biochemical treatment system also wraps
Anoxic pond is included, the adsorption tank, the hydrolysis acidification pool, the anoxic pond and the aerobic tank are sequentially connected along water (flow) direction.
11. the biological treatment system of waste water according to claim 10, which is characterized in that the aerobic tank preferably oxygen flow
Bed, ordinary activated sludge aeration tank, sbr reactor pond, the aeration tanks CASS or oxidation ditch.
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| CN201310190092.XA CN103241902B (en) | 2013-05-21 | 2013-05-21 | A kind of biological treatment of waste water and biological treatment system using the technique |
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| CN103241902B true CN103241902B (en) | 2018-10-16 |
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