CN105174462A - Papermaking wastewater treatment process - Google Patents
Papermaking wastewater treatment process Download PDFInfo
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- CN105174462A CN105174462A CN201510670589.0A CN201510670589A CN105174462A CN 105174462 A CN105174462 A CN 105174462A CN 201510670589 A CN201510670589 A CN 201510670589A CN 105174462 A CN105174462 A CN 105174462A
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Abstract
The invention discloses a papermaking wastewater treatment process. A MUCT is composed of five functional regions: a hydrolytic acidification tank, a pre-oxygen-poor tank, an anaerobic tank, an oxygen-poor tank and an aerobic tank, wherein stirring devices are arranged in the oxygen-poor tank and the anaerobic tank; one group of compound filler suspension bed is arranged at each of water inlets and water outlets of the oxygen-poor tank and the anaerobic tank; one group of compound filler suspension bed is arranged at each of the water inlet and the water outlet of the hydrolytic acidification tank; four groups of compound filler suspension beds are arranged in the aerobic tank; aeration equipment is arranged at the bottom of the aerobic tank. The papermaking wastewater treatment process is very excellent and the treatment of papermaking wastewater is optimized.
Description
Technical field
The invention belongs to paper waste field of sewage treatment, be specifically related to a kind of paper-making effluent treating process and system.
Background technology
Paper industry uses timber, straw, reed, rag etc. to be raw material, isolates Mierocrystalline cellulose, make paper pulp through High Temperature High Pressure boiling.In process of production, finally the non-cellulose part of discharging in raw material becomes black liquid.Containing xylogen, Mierocrystalline cellulose, VFA etc. in black liquor, frowziness, contaminative is very strong.
How high efficiency, low cost ground Processing Paper Wastewater, is the important problem that field of papermaking faces always.
Summary of the invention
The present invention is directed to the shortcoming of prior art, by years of researches and experiment, obtain a kind of new paper-making effluent treating process and system.The present invention adopts MUCT microbial film phase technique, namely in reaction tank, adds biofilm reactor.The denitrification dephosphorization technique that the present invention adopts is MUCT, and the biofilm reactor of employing is microbial film fixed-bed reactor, and the filler added in fixed-bed reactor is fibrous bundle filler.
Technical scheme of the present invention is as follows:
A kind of paper-making effluent treating process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Omitted by original second pond, Aerobic Pond water outlet is arranged filtering membrane, by sludge retention in Aerobic Pond, sewage does not need directly to flow out through second pond after treatment, saves the capital cost of second pond.Change preliminary sedimentation tank into hydrolysis acidification pool, due in paper waste at the bottom of organic carbon source, after acid hydrolysis, the organic macromolecule that microorganism difficulty utilizes is hydrolyzed to small molecules, increasing microorganism in waste water can utilize carbon source;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.9 ~ 5.5, temperature: 25 DEG C ~ 28 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 30 DEG C ~ 33 DEG C, pH=6.5 ~ 7.4, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 39 DEG C ~ 45 DEG C, pH=6.5 ~ 7.4 are strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 22 DEG C ~ 27 DEG C, pH=7.2 ~ 7.9, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Described suspension type fixed bed of often organizing arranges four bundle conjugated fibre silk bio-carriers;
Described conjugated fibre silk bio-carrier is divided into:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth;
Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Because water inlet is at technique leading portion overstand, increase anoxic pond and anaerobic pond consuming excessively organic carbon source, cause Aerobic Pond carbon source not enough, therefore in blend fiber silk, add flax silk, for Aerobic Pond increases carbon source.On the raw material of outer looped pile, glass fiber is worked out endless loop, increase the toughness of material, increase endless loop to the cutting dynamics of underwater bubble.In outer screen cloth, add activated carbon fiber, utilize activated carbon fiber to increase the attachment of outer layer net microorganism.
Described conjugated fibre silk bio-carrier specification is:
(1) compounded mix bundle size: Φ 15 × 100cm.According to reaction tank depth design filler size, the dark 4m in general pond, compounded mix is set to 100cm, is positioned in the middle part of reaction tank, is therefore less than depth of water.
(2) endless loop length: 6cm, namely to external expansion 3cm.Endless loop diameter is the cutting underwater bubble that 3cm can be strong.
(3) outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness, for aerobic bacteria provides existence place, improves the air permeable effect of filler.
(4) inner bundle of composite fibers pigtail material size: Φ 8 × 90cm, bundle of composite fibers pigtail material diameter is set to 8cm, for anerobe and facultative anaerobe provide anoxic, the existence of anaerobism place.
(5) outer layer net is arranged net hole size: 0.5mm, and screen cloth aperture is set to 0.5mm, increases endless loop distribution density, strengthen cutting bubble effect, can adsorb bubble, endless loop is also the attachment place of microorganism, therefore can increase the biomass in microbial film simultaneously.
(2) pulping wastewater treatment:
Paper waste enters hydrolysis acidification pool and stops 1 ~ 1.5 hour, then enters anaerobic pond and stops 50 ~ 65min, then enters pre-anoxic pond stop 30min, then enters anoxic pond stop 5 ~ 8min, then enters Aerobic Pond stop 35 ~ 50min; Whipping appts in anoxic pond and anaerobic pond is in whipped state always;
(3) sewage discharge after process;
Paper waste after process is discharged through discharge outlet.
Adopt papermaking wastewater treatment system prepared by above-mentioned paper-making effluent treating process, its hydrolysis acidification pool connects the water port of papermaking apparatus.
In the kind of microorganism and reactor, hydraulic detention time to be degraded the impact had clearly for the removal of anaerobism COD.Higher flow velocity can increase the disturbance in reactor, thus it is more abundant that mud is contacted with organic in waste water, is conducive to improving clearance.But the water outlet of high flow rate flows through often carries anaerobic membrane, decreases biofilm biomass in reactor.Lower flow velocity can increase sewage and biomembranous duration of contact, microorganism is absorbed fully, nutritive substance in degradation of sewage, improves processing efficiency; But too low flow velocity also can cause part microorganism cannot obtain sufficient nutrient thing, if can not get sufficient nutrition for a long time, will cause microorganism endogenous respiration thus biofilm detachment.Therefore, in order to obtain good treatment effect, it is vital for choosing suitable hydraulic detention time.The present invention is from device, and to microorganism, carried out comprehensive optimization to technique during process, thus obtained a kind ofly processing the very excellent technique of waste water, it effectively can remove nitrogen phosphoric in water, and reduces COD very significantly.
Usefulness of the present invention is:
1, contain very high nitrogen phosphoric in paper waste, technique of the present invention and system are suitable for papermaking and give up, and effectively can remove nitrogen phosphoric in paper waste, and significantly reduce COD.
2, technological operation of the present invention is simple, can implement on a large scale.
Accompanying drawing explanation
Fig. 1 is artwork of the present invention.MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond.
Embodiment
Bio-denitrifying sewage dephosphorization refers in the reaction tank manually constructed, utilize the compound of high-density, highly active microbial population sorption enhanced Nitrogen-and Phosphorus-containing element, be converted into cell composition by microbial assimilation effect or be converted into small-molecule substance by dissimilation, after purifying treatment, in sewage, the concentration of Nitrogen-and Phosphorus-containing pollutent reaches emission standard.Owing to receiving, dirty water body self-purification ability is limited, and dirty storage effect of receiving for a long time can make the pollution load of natural Hu Ku increase gradually.Nitrogen in water body can become nitrogen through bio-transformation, thoroughly gets rid of from sewage.Phosphorus in water body changes into precipitation through chemical action and biochemical action from solubilised state, is accumulated in bed mud, and when conditions change, the phosphorus of deposition can dissolve again, is again discharged in water body.
Bio-denitrifying sewage dephosphorization process, normally by regulating the conditions such as hydraulics, matrix components, dissolved oxygen, specific conductivity, allow and really change bacterium, denitrifying bacterium, poly-phosphorus bacteria etc. and breed in the differential responses section of technique and become dominant population, participate in removal and the conversion of nitrogen phosphorus in sewage, generally all comprise the operation links such as anaerobism, aerobic and sludge treatment.
UCT technique and traditional A
2the difference of/O technique is: second pond muddy water mixed solution is not back to anaerobic pond, but is back to anoxic pond, and like this, effectively can prevent the nitric nitrogen in phegma from entering anaerobic zone and suppress polyP bacteria (PAO) grow and release phosphorus, UCT technique is than traditional A
2/ O technique dephosphorization efficiency by using is high, but cannot avoid into the impact of the nitric nitrogen in water on PAO.Meanwhile, anaerobic pond is not because having sludge reflux, and sludge concentration and sludge settling property can be affected.UCT technique and traditional A
2the difference of/O technique is: second pond muddy water mixed solution is not back to anaerobic pond, but is back to anoxic pond, and like this, effectively can prevent the nitric nitrogen in phegma from entering anaerobic zone and suppress polyP bacteria (PAO) grow and release phosphorus, UCT technique is than traditional A
2/ O technique dephosphorization efficiency by using is high, but cannot avoid into the impact of the nitric nitrogen in water on PAO.Meanwhile, anaerobic pond is not because having sludge reflux, and sludge concentration and sludge settling property can be affected.
Improvement UCT denitrification dephosphorization technique is on UCT Process ba-sis, anoxic pond is divided into two control units, has set up the backflow from anoxic pond one to anaerobic pond, ensure that sludge concentration and the hydraulic detention time of anaerobic pond.Now, system comprises two internal reflux of Aerobic Pond end to anoxic pond two, anoxic pond one to anaerobic pond, greatly reduces and enters anaerobic pond state nitrogen really.Membrane bioreactor (is the Novel sewage treatment technology that membrane separation technique is combined with biotechnology, hollow-fibre membrane or flat sheet membrane physical isolation is utilized to purify waste water and active sludge, save second pond, improve activated sludge concentration, achieve hydraulic detention time to be separated with the thorough of sludge retention time, the macromolecular substance of difficult degradation constantly can contact with active sludge in the reactor, finally be degraded.
Static bed biomembrane reactor, microbial film attachment carrier is generally soft, semi soft packing and elastic solid filler, and filler is fixed in reactor, and relative position is substantially constant.According to liquid phase flow mode, be divided into upflowing and downflow system.Generally, high less than detersive efficiency.Advantage be without backwash operation, sludge creation amount is little, power consumption is relatively little.
Filler is the core of biomembrance process, to the processing efficiency, the reduction running cost that improve biofilm reactor, there is vital effect filler load microbial film, for the growth of anaerobism, facultative and aerobic microbiological, metabolism, breeding provide place, simultaneously as relative stationary phase, for gas, liquid, solid three-phase provides contact surface.The medium of filler or water flow cutting and bubble, for improving gas phase, the auspicious stream of liquid phase creates conditions, and promotes gas-liquid, mass transfer between solid-liquid and gas-solid.Property relationship biophasic distribution in microbial film of filler, microbial growth situation, the mass-transfer efficiency of oxygen, pollutent, the ￡ power loss etc. that equipment runs, finally affects sewage treating efficiency and the working cost of biofilm reactor.
Filler generally has following features: (1) has chemical stability, thermostability, preferably biocompatibility, does not produce poisonous and harmful element, does not produce restraining effect to the metabolism of microorganism; (2) specific surface area is large, and porosity is high, and liquid, solid, gas phase contact surface enrich, and easy back flushing, is easy to biofilm detachment and upgrades; (3) surface wettability is good, has enough raw sugar degree load biomasss, has bioaffinity, easy biofilm; (4) mass-transfer efficiency is high, and resistance to flow is little, is conducive to creating auspicious stream; (5) be easy to dispersed, be conducive to gas distribution, water distribution, in reaction vessel, do not form blocking, dead angle or short stream; (6) lightweight, there is certain physical strength, wear-resisting, withstand voltage, corrosion resistant light up, long service life, be easy to change regeneration, backwashing period is long; (7) be easy to get, easily make, inexpensive, be convenient to transport, store and install.
Gimp formula fibrous bundle biofilm filler profile is curtain structure, is convenient to install, and also claims plaited curtain type water treatment filler.Organic fibre silk is relatively fluffy, and looped pile has good cutting action to bubble, can effectively improve oxygen transfer rate and coefficient of oxygen utilization.Biofilm packing specific area is large, and voidage is high, high adsorption capacity, has storage oxygen function, hydrophilic, oleophylic.Biofilm is fast, and microbial film physically well develops, and is easy to microbial film and upgrades.Simulation natural waterweeds form, not easily receives Tibetan mud, and resistance to high loading is raw to be impacted, and do not block, mass-transfer efficiency is high, long service life.
Microbial method is widely used a kind of sewage treatment process, along with this technique updating in production practice, particularly in recent decades on the basis of its biological respinse and purification mechanism being carried out to extensively research, is greatly improved.Anoxic section heterotrophic bacterium, the suspended substances such as the starch in sewage, fiber, carbohydrate and dissolved organic matter are hydrolyzed to organic acid, larger molecular organics resolves into small organic molecule, insoluble organism is converted into dissolved organic matter, when these products through anaerobic hydrolysis enter aerobic section process, the efficiency of biodegradability in sewage and oxygen can be improved.In anoxic section, the pollutent such as protein, fat can be carried out ammonification (N in organic chain or the amino in amino acid) and to dissociate ammonia (NH3, NH4+) by heterotrophic bacterium, at aerobic section, NH4+ is oxidized to NO3-by the nitrification of autotrophic bacteria, anoxic section is back to by backflow control, the denitrification of heterotrophic bacterium will be reduced into molecular state nitrogen (N2), complete C, N, O circulation in ecology, realize sewage harmless treatment.
The present invention aims to provide a kind of new biofilm sewage treatment process, substantially improves sewage treatment process and optimizes the proportioning of microorganism, can reach good wastewater treatment efficiency, all fine to various types of wastewater treatment efficiency.
Embodiment 1:
Biofilm sewage treatment process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Omitted by original second pond, Aerobic Pond water outlet is arranged filtering membrane, by sludge retention in Aerobic Pond, sewage does not need directly to flow out through second pond after treatment, saves the capital cost of second pond.Change preliminary sedimentation tank into hydrolysis acidification pool, because in paper waste, organic carbon source content is low, after acid hydrolysis, the organic macromolecule that microorganism difficulty utilizes is hydrolyzed to small molecules, increasing microorganism in waste water can utilize carbon source;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.9, temperature: 28 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 30 DEG C, pH=7.4, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 39 DEG C, pH=7.4 is strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 22 DEG C, pH=7.9, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Described suspension type fixed bed of often organizing arranges four bundle conjugated fibre silk bio-carriers;
Described conjugated fibre silk bio-carrier is divided into:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth;
Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Because water inlet is at technique leading portion overstand, cause anoxic pond and anaerobic pond consuming excessively organic carbon source, cause Aerobic Pond carbon source not enough, therefore in blend fiber silk, add flax silk, for Aerobic Pond increases carbon source.On the raw material of outer looped pile, glass fiber is worked out endless loop, increase the toughness of material, increase endless loop to the cutting dynamics of underwater bubble.In outer screen cloth, add activated carbon fiber, utilize activated carbon fiber to increase outer layer net microorganic adhesion amount.
Described conjugated fibre silk bio-carrier specification is:
(1) compounded mix bundle size: Φ 15 × 100cm.According to reaction tank depth design filler size, the dark 4m in general pond, compounded mix is set to 100cm, is positioned in the middle part of reaction tank, is therefore less than depth of water.
(2) endless loop length: 6cm, namely to external expansion 3cm.Endless loop diameter is the cutting underwater bubble that 3cm can be strong.
(3) outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness, for aerobic bacteria provides existence place, improves the air permeable effect of filler.
(4) inner bundle of composite fibers pigtail material size: Φ 8 × 90cm, bundle of composite fibers pigtail material diameter is set to 8cm, for anerobe and facultative anaerobe provide anoxic, the existence of anaerobism place.
(5) outer layer net is arranged net hole size: 0.5mm, and screen cloth aperture is set to 0.5mm, increases endless loop distribution density, strengthen cutting bubble effect, can adsorb bubble, endless loop is also the attachment place of microorganism, therefore can increase the biomass in microbial film simultaneously.
(2) sewage disposal:
Former water enters hydrolysis acidification pool and stops 1 hour, then enters anaerobic pond and stops 65min, then enters anoxic pond stop 30min, then enters anoxic pond stop 5min, then enters Aerobic Pond stop 50min; Whipping appts in anoxic pond and anaerobic pond is in whipped state always;
(3) sewage discharge;
Sewage after process is discharged through discharge outlet.
Test period is 3 months, comprehensive wastewater treatment effect:
Influent quality is: COD
crfor 505mg/L, BOD
5for 192mg/L, ammonia nitrogen 28mg/L, TN37mg/L;
Water treatment effect: COD clearance reaches 93%, average effluent COD is 35mg/L.Ammonia nitrogen removal frank is 78.5%, and mean value is 2.0mg/L.TN clearance is 94.7%, and removal amount is 2mg/L.
Embodiment 2:
Biofilm sewage treatment process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Omitted by original second pond, Aerobic Pond water outlet is arranged filtering membrane, by sludge retention in Aerobic Pond, sewage does not need directly to flow out through second pond after treatment, saves the capital cost of second pond.Change preliminary sedimentation tank into hydrolysis acidification pool, due in paper waste at the bottom of organic carbon source, after acid hydrolysis, the organic macromolecule that microorganism difficulty utilizes is hydrolyzed to small molecules, increasing microorganism in waste water can utilize carbon source;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.5, temperature: 24 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 32 DEG C, pH=6.4, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 44 DEG C, pH=4.5 is strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 22 DEG C, pH=6.2, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Described suspension type fixed bed of often organizing arranges four bundle conjugated fibre silk bio-carriers;
Described conjugated fibre silk bio-carrier is divided into:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth;
Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Because water inlet is at technique leading portion overstand, increase anoxic pond and anaerobic pond consuming excessively organic carbon source, cause Aerobic Pond carbon source not enough, therefore in blend fiber silk, add flax silk, for Aerobic Pond increases carbon source.On the raw material of outer looped pile, glass fiber is worked out endless loop, increase the toughness of material, increase endless loop to the cutting dynamics of underwater bubble.In outer screen cloth, add activated carbon fiber, utilize activated carbon fiber to increase the attachment of outer layer net microorganism.
Described conjugated fibre silk bio-carrier specification is:
(1) compounded mix bundle size: Φ 16 × 100cm.According to reaction tank depth design filler size, the dark 4m in general pond, compounded mix is set to 100cm, is positioned in the middle part of reaction tank, is therefore less than depth of water.
(2) endless loop length: 7cm, namely to external expansion 3.5cm.Endless loop diameter is the cutting underwater bubble that 3cm can be strong.
(3) outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness, for aerobic bacteria provides existence place, improves the air permeable effect of filler.
(4) inner bundle of composite fibers pigtail material size: Φ 12 × 90cm, bundle of composite fibers pigtail material diameter is set to 12cm, for anerobe and facultative anaerobe provide anoxic, the existence of anaerobism place.
(5) outer layer net is arranged net hole size: 0.44mm, and screen cloth aperture is set to 0.44mm, increases endless loop distribution density, strengthen cutting bubble effect, can adsorb bubble, endless loop is also the attachment place of microorganism, therefore can increase the biomass in microbial film simultaneously.
(2) sewage disposal:
Paper waste enters hydrolysis acidification pool and stops 1.8 hours, then enters anaerobic pond and stops 55min, then enters pre-anoxic pond stop 45min, then enters anoxic pond stop 8 ~ 12min, then enters Aerobic Pond stop 45 ~ 50min; Be provided with whipping appts in anoxic pond and anaerobic pond, be in whipped state always;
(3) sewage discharge;
Sewage after process is discharged through discharge outlet.
Test period is 4 months, comprehensive wastewater treatment effect:
Influent quality is: COD
crfor 705mg/L, BOD
5for 162mg/L, ammonia nitrogen 38mg/L, TN47mg/L; Water treatment effect: COD clearance reaches 94.6%, average effluent COD is 25mg/L.Ammonia nitrogen removal frank is 88.5%, and mean value is 2.5mg/L.TN clearance is 97.7%, and removal amount is 3.5mg/L.
Embodiment 3:
Biofilm sewage treatment process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Omitted by original second pond, Aerobic Pond water outlet is arranged filtering membrane, by sludge retention in Aerobic Pond, sewage does not need directly to flow out through second pond after treatment, saves the capital cost of second pond.Change preliminary sedimentation tank into hydrolysis acidification pool, due in paper waste at the bottom of organic carbon source, after acid hydrolysis, the organic macromolecule that microorganism difficulty utilizes is hydrolyzed to small molecules, increasing microorganism in waste water can utilize carbon source;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=5.2, temperature: 22 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 33 DEG C, pH=8.0, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 33 DEG C, pH=6.8 is strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 26 DEG C, pH=6.8, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Described suspension type fixed bed of often organizing arranges four bundle conjugated fibre silk bio-carriers;
Described conjugated fibre silk bio-carrier is divided into:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth;
Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Because water inlet is at technique leading portion overstand, increase anoxic pond and anaerobic pond consuming excessively organic carbon source, cause Aerobic Pond carbon source not enough, therefore in blend fiber silk, add flax silk, for Aerobic Pond increases carbon source.On the raw material of outer looped pile, glass fiber is worked out endless loop, increase the toughness of material, increase endless loop to the cutting dynamics of underwater bubble.In outer screen cloth, add activated carbon fiber, utilize activated carbon fiber to increase the attachment of outer layer net microorganism.
Described conjugated fibre silk bio-carrier specification is:
(1) compounded mix bundle size: Φ 16 × 100cm.According to reaction tank depth design filler size, the dark 4m in general pond, compounded mix is set to 100cm, is positioned in the middle part of reaction tank, is therefore less than depth of water.
(2) endless loop length: 7cm, namely to external expansion 3.5cm.Endless loop diameter is the cutting underwater bubble that 3.5cm can be strong.
(3) outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness, for aerobic bacteria provides existence place, improves the air permeable effect of filler.
(4) inner bundle of composite fibers pigtail material size: Φ 12 × 90cm, bundle of composite fibers pigtail material diameter is set to 12cm, for anerobe and facultative anaerobe provide anoxic, the existence of anaerobism place.
(5) outer layer net is arranged net hole size: 0.33mm, and screen cloth aperture is set to 0.33mm, increases endless loop distribution density, strengthen cutting bubble effect, can adsorb bubble, endless loop is also the attachment place of microorganism, therefore can increase the biomass in microbial film simultaneously.
(2) sewage disposal:
Paper waste enters hydrolysis acidification pool and stops 2.3 hours, then enters anaerobic pond and stops 58min, then enters pre-anoxic pond stop 45min, then enters anoxic pond stop 8min, then enters Aerobic Pond stop 54min; Be provided with whipping appts in anoxic pond and anaerobic pond, be in whipped state always;
(3) sewage discharge;
Sewage after process is discharged through discharge outlet.
Test period is 4 months, comprehensive wastewater treatment effect:
The mean value of the indices of water inlet waste water is respectively: COD=894mg/L; Ammonia nitrogen=92.89mg/L; BOD
5=230mg/L, TP=2.9mg/L, SS=436mg/L heavily contaminated water treatment effect:
Handled sewage quality is: COD515mg/L, BOD
5=155mg/L, SS=156mg/L, NH
4 +-N=0.9mg/L, NO
2--N=0.9mg/L.To effluent quality after above-mentioned process be: COD<30mg/L, clearance more than 99%, BOD
5=2mg/L, clearance more than 98%, SS<1mg/L, almost all removes, NH
4 +-N<1mg/L, almost all removes, TN<5mg/L, and clearance can reach more than 95%, TP<0.5mg/L, pH=7.0 ~ 8.0.
Embodiment 4 comparative example:
Comparative example adopts the different treatment times, and additive method is identical:
Biofilm sewage treatment process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of filler fixed beds, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Omitted by original second pond, Aerobic Pond water outlet is arranged filtering membrane, by sludge retention in Aerobic Pond, sewage does not need directly to flow out through second pond after treatment, saves the capital cost of second pond.Change preliminary sedimentation tank into hydrolysis acidification pool, due in paper waste at the bottom of organic carbon source, after acid hydrolysis, the organic macromolecule that microorganism difficulty utilizes is hydrolyzed to small molecules, increasing microorganism in waste water can utilize carbon source;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.4, temperature: 23 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 43 DEG C, pH=6.4, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 39 DEG C ~ 45 DEG C, pH=6.9 is strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 27 DEG C, pH=79, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Described suspension type fixed bed of often organizing arranges four bundle conjugated fibre silk bio-carriers;
Described conjugated fibre silk bio-carrier is divided into:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth;
Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Because water inlet is at technique leading portion overstand, increase anoxic pond and anaerobic pond consuming excessively organic carbon source, cause Aerobic Pond carbon source not enough, therefore in blend fiber silk, add flax silk, for Aerobic Pond increases carbon source.On the raw material of outer looped pile, glass fiber is worked out endless loop, increase the toughness of material, increase endless loop to the cutting dynamics of underwater bubble.In outer screen cloth, add activated carbon fiber, utilize activated carbon fiber to increase the attachment of outer layer net microorganism.
Described conjugated fibre silk bio-carrier specification is:
(1) compounded mix bundle size: Φ 17 × 100cm.According to reaction tank depth design filler size, the dark 4m in general pond, compounded mix is set to 100cm, is positioned in the middle part of reaction tank, is therefore less than depth of water.
(2) endless loop length: 8cm, namely to external expansion 4cm.Endless loop diameter is the cutting underwater bubble that 4cm can be strong.
(3) outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness, for aerobic bacteria provides existence place, improves the air permeable effect of filler.
(4) inner bundle of composite fibers pigtail material size: Φ 13 × 90cm, bundle of composite fibers pigtail material diameter is set to 13cm, for anerobe and facultative anaerobe provide anoxic, the existence of anaerobism place.
(5) outer layer net is arranged net hole size: 0.6mm, and screen cloth aperture is set to 0.6mm, increases endless loop distribution density, strengthen cutting bubble effect, can adsorb bubble, endless loop is also the attachment place of microorganism, therefore can increase the biomass in microbial film simultaneously.
(2) sewage disposal:
Paper waste enters hydrolysis acidification pool and stops 2 hours, then enters anaerobic pond and stops 35min, then enters pre-anoxic pond stop 30min, then enters anoxic pond stop 50min, then enters Aerobic Pond stop 20min; Be provided with whipping appts in anoxic pond and anaerobic pond, be in whipped state always;
(3) sewage discharge;
Sewage after process is discharged through discharge outlet.
Test period is 5 months, comprehensive wastewater treatment effect:
Handled sewage quality is: COD=346.2mg/L, SS=42mg/L, NH4+-N=36.5mg/L,, pH=7.8.To effluent quality after above-mentioned process be: COD<50mg/L, SS<0.28mg/L, almost all remove, NH
4 +-N<9mg/L, almost all removes, TP<0.3mg/L, pH=6.5 ~ 9.0.In addition, after deliberation, the COD clearance of present method to pollutant effluents all can reach more than 90%, equal free from extraneous odour after process.
Embodiment 5
A kind of pulping wastewater treatment method, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of compounded mixs suspension bed, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.7, temperature: 27 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 26 DEG C, pH=6.6, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 38 DEG C ~ 40 DEG C, pH=6.7 is strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 28 DEG C, pH=6.0, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Compounded mix is suspension bed arranges six bundle conjugated fibre silk bio-carriers for described often group;
Described conjugated fibre silk bio-carrier is formed:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth; Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Described conjugated fibre silk bio-carrier specification is:
Compounded mix bundle size: Φ 12 × 100cm;
Endless loop length: 6cm, namely to external expansion 3cm;
Outer layer net size: Φ 3 × 100cm, keeps certain outer layer net thickness;
Inner bundle of composite fibers pigtail material size: Φ 9 × 90cm, bundle of composite fibers pigtail material diameter is set to 9cm;
Outer layer net is arranged net hole size: 0.45mm, and screen cloth aperture is set to 0.45mm;
(2) pulping wastewater treatment:
The former water of paper waste enters hydrolysis acidification pool successively and stops 1-1.5 hour, and pre-anoxic pond stops 50-65min, anaerobic pond stops 30min, anoxic pond stops 5-8min, Aerobic Pond stops 35-50min; Whipping appts in anoxic pond and anaerobic pond is in whipped state always;
(3) the useless discharge of papermaking;
Paper waste after process is discharged through discharge outlet.
Pulping wastewater treatment effect:
Influent quality is: COD
crfor 755mg/L, BOD
5for 122mg/L, ammonia nitrogen 3mg/L, TN37mg/L; Water treatment effect: COD clearance reaches 92.6%, average effluent COD is 35mg/L.Ammonia nitrogen removal frank is 92.5%, and mean value is 1.5mg/L.TN clearance is 98.7%, and removal amount is 3.5mg/L.
As can be seen here, technique of the present invention is very outstanding, and to the structure of sewage treatment process, the reaction times in the microbe species applied in sewage treatment process and each stage is all optimized, and has good effect to the process of paper waste.
Above are only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (3)
1. a paper-making effluent treating process, it comprises the steps:
(1) MUCT device is built:
MUCT is made up of 5 functional zone: hydrolysis acidification pool, pre-anoxic pond, anaerobic pond, anoxic pond, Aerobic Pond; Whipping appts is provided with in anoxic pond and anaerobic pond, one group of compounded mix is placed suspension bed in anoxic pond and anaerobic pond water-in, it is suspension bed that hydrolysis acidification pool water outlet and water inlet respectively place one group of compounded mix, places 4 groups of compounded mixs suspension bed, place sudden and violent gas equipment bottom pond in Aerobic Pond;
Short lactobacillus (Lactobacillusbreris), alicyclic acid genus bacillus (AlicyclobacilusWistzkey) is inoculated in hydrolysis acidification pool, pH=4.9 ~ 5.5, temperature: 25 DEG C ~ 28 DEG C, sludge retention time is 8d, short lactobacillus and alicyclic acid genus bacillus are acidophilic bacteria, all can survive in acid condition, and larger molecular organics of degrading;
Pre-anoxic pond, anoxic pond inoculation wax genus bacillus (BacillusCereus), sweetfish pseudomonas (Pseudomonaplecoylossicida), temperature 30 DEG C ~ 33 DEG C, pH=6.5 ~ 7.4, sludge retention time is 8d, wax genus bacillus and sweetfish pseudomonas are facultative anaerobe, denitrification can be carried out, for sewage carries out denitrogenation;
Anaerobic pond inoculation ethanol thermophilc anaerobe (Thermoanaerobacterethanlicus) temperature 39 DEG C ~ 45 DEG C, pH=6.5 ~ 7.4 are strictly anaerobic bacterium, and sludge retention time is 8d, can under the condition of strictly anaerobic degradation of organic substances, by waste water through carrying out denitrogenation dephosphorizing;
Gastral cavity silk yeast (Candidautilis), the red bacterium of fixed nitrogen (Rhodobacterazotoformans), Bacillus subtilis subspecies (Bacillussubtilissubsp.subtilis) are produced in Aerobic Pond inoculation, temperature: 22 DEG C ~ 27 DEG C, pH=7.2 ~ 7.9, sludge retention time is 8d, degradation of organic substances ability is strong, reduce the COD of waste water, improve effluent characteristics;
Compounded mix is suspension bed arranges four bundle conjugated fibre silk bio-carriers for described often group;
Described conjugated fibre silk bio-carrier is formed:
Outside sandwich: the screen cloth of activated carbon fiber and polypropylene fibre mixing, braided glass fibre silk endless loop on screen cloth; Inner core: blend fiber silk gimp, flax silk and trevira silk are woven into gimp;
Described conjugated fibre silk bio-carrier specification is:
Compounded mix bundle size: Φ 15 × 100cm;
Endless loop length: 6cm, namely to external expansion 3cm;
Outer layer net size: Φ 4 × 100cm, keeps certain outer layer net thickness;
Inner bundle of composite fibers pigtail material size: Φ 8 × 90cm, bundle of composite fibers pigtail material diameter is set to 8cm;
Outer layer net is arranged net hole size: 0.5mm, and screen cloth aperture is set to 0.5mm;
(2) pulping wastewater treatment:
The former water of paper waste enters hydrolysis acidification pool successively and stops 1-1.5 hour, and pre-anoxic pond stops 50-65min, anaerobic pond stops 30min, anoxic pond stops 5-8min, Aerobic Pond stops 35-50min; Whipping appts in anoxic pond and anaerobic pond is in whipped state always;
(3) paper waste discharge;
Paper waste after process is discharged through discharge outlet.
2. paper-making effluent treating process according to claim 1, is characterized in that:
Described processed be the heavily contaminated water quality that COD is greater than 5000mg/L.
3. adopt papermaking wastewater treatment system prepared by the paper-making effluent treating process of claim 1 or 2, its hydrolysis acidification pool connects the water port of papermaking apparatus.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892538A (en) * | 2017-03-17 | 2017-06-27 | 天津中冀源环保科技有限公司 | The biochemical materialization combined treatment process of cassava alcohol waste water |
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| JPH0235995A (en) * | 1988-07-22 | 1990-02-06 | Nishihara Environ Sanit Res Corp | Treatment of organic waste water |
| CN102092843A (en) * | 2010-12-15 | 2011-06-15 | 陈幼岳 | High-performance biological contact filler (biological string) |
| CN102583747A (en) * | 2012-03-20 | 2012-07-18 | 哈尔滨工业大学 | Device and process for biochemically denitrifying high-ammonia nitrogen tanning wastewater |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0235995A (en) * | 1988-07-22 | 1990-02-06 | Nishihara Environ Sanit Res Corp | Treatment of organic waste water |
| CN102092843A (en) * | 2010-12-15 | 2011-06-15 | 陈幼岳 | High-performance biological contact filler (biological string) |
| CN102583747A (en) * | 2012-03-20 | 2012-07-18 | 哈尔滨工业大学 | Device and process for biochemically denitrifying high-ammonia nitrogen tanning wastewater |
| CN104341075A (en) * | 2013-08-01 | 2015-02-11 | 中国环境科学研究院 | Variable-volume improved A<2>/O deep nitrogen and phosphorus removal process for sewage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106892538A (en) * | 2017-03-17 | 2017-06-27 | 天津中冀源环保科技有限公司 | The biochemical materialization combined treatment process of cassava alcohol waste water |
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