CN105130096A - Chemical engineering sewage deep treatment system - Google Patents
Chemical engineering sewage deep treatment system Download PDFInfo
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- CN105130096A CN105130096A CN201510417914.2A CN201510417914A CN105130096A CN 105130096 A CN105130096 A CN 105130096A CN 201510417914 A CN201510417914 A CN 201510417914A CN 105130096 A CN105130096 A CN 105130096A
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Abstract
The invention provides a chemical engineering sewage deep treatment system which includes a coarse grating, a lifting pump room, a fine grating, a drum micro-filtering machine, a pH regulation tank, a flocculation and sedimentation tank, a PVA gelation tank, a sedimentation tank, a membrane-biological reactor, a secondary sedimentation tank, an EV fiber filtering tank, an ultrasonic disinfection tank, an ultraviolet disinfection tank and an effluent lifting pump room, wherein the flocculation and sedimentation tank, the sedimentation tank and the secondary sedimentation tank are respectively connected to a sludge concentration tank. An outlet of the sludge concentration tank is connected to a sludge dehydration room. A flocculation agent includes, by mass, 100 parts of alkaline papermaking sludge, 25-30 parts of sodium sulfite or sodium thiosulfate and 45-55 parts of 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride. By means of the chemical engineering sewage deep treatment system, water quality can reach or exceed the emission standard of grade A in "discharge standard of pollutants in municipal sewage treatment plant" (GB18918-2002).
Description
Technical field
The present invention relates to a kind of chemical engineering sewage advanced treatment system, belong to technical field of sewage.
Background technology
Industrial enterprise's quantity of wastewater effluent of China is in higher level; " first time national Pollutant source investigation publication " display of national environmental protection portion announcement on 02 25th, 2010: 2007; whole nation trade effluent generation is 738.33 hundred million tons; amount through 140652 cover Industrial Wastewater Treatment facility process is about 458.52 hundred million tons, and processing rate is about 62%.The sewage handling problem of industrial enterprise becomes the matter of utmost importance of restriction Industrial Economic Development always.
In industrial sewage, the sewage discharge of chemical enterprise account for very large a part of proportion, pharmacy sewage belongs to a large class of chemical engineering sewage, the chemical reagent using many organic or inorganics is usually needed in pharmacy procedure, the sewage produced in last production process is except containing a large amount of organic and inorganic pollution beyond the region of objective existences, also containing the harmful microorganism that a large amount of harm humans is healthy, if directly discharge without process, serious harm will be produced to ecotope and human health.And at present along with the enhancing of the environmental consciousness of people, the concern of sewage disposal is also strengthened all the more.
Meanwhile, at present, the standard-required of China to sewage disposal is more and more higher.Such as Jiangsu Province, in order to protect Taihu Lake environment, just requires that in TAIHU LAKE Pollution abatement programme of work the water outlet of the sewage work that Ring theory is all needs to perform the emission standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A and more strict local pollutant emission standard.This standard, compared to " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard, requires strict all the more to BOD5, CODCr, SS, TN, NH3-N, TP in sewage disposal etc.
In the past, process for sewage adopts following processing technological flow substantially: wastewater influent → inlet pumping station → preliminary sedimentation tank → biological reaction tank → second pond → sterilization pool → draining, and this sewage treatment process fully can not dispose pollutent in sewage and impurity.
Therefore; in order to protection of the environment; also in order to the development of industrial economy; be necessary to develop a kind of new Sewage treatment systems; this system can carry out advanced treatment to sewage, the water quality after processing can be reached and higher than the emission standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A.
Summary of the invention
Goal of the invention: the object of the invention is to solve the deficiencies in the prior art, provides a kind of chemical engineering sewage advanced treatment system.
Technical scheme: in order to realize above object, a kind of chemical engineering sewage advanced treatment system of the present invention, comprise coarse rack, lift pump room, fine fack, rotary drum Microfilter, acid-alkali accommodation pond, flocculation basin settling tank, PVA gel pond, settling tank, membrane bioreactor, second pond, EV fibre filter, ultrasonic sterilization pond, disinfection by ultraviolet light pond, water outlet lift pump room, said apparatus is connected successively by pipeline; Described flocculation basin settling tank, settling tank, second pond are also connected to mud concentration basin simultaneously, and the outlet of described mud concentration basin is connected with between sludge dewatering;
The flocculation agent that described flocculation basin settling tank adopts comprises following component by massfraction:
Alkali paper-making mud: 100 parts;
S-WAT or Sulfothiorine: 25-30 part;
The chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-: 45-55 part.
Be provided with intake pump in lift pump room in the present invention, mainly realize the once lifting of sewage, to realize the run by gravity of subsequent treatment process;
Owing to containing a large amount of suspended substances and floating matter in sewage, it enters water treatment building and can sink under water or bubble through the water column, and brings impact to the normal operation of equipment, makes it be difficult to play due effect, must be removed.Suspend or floating substance to remove these, therefore before intake pump promotes, coarse rack is provided with, intake pump is provided with fine fack after promoting, and the coarse rack of setting and fine fack just can retain suspended substance or the floating matter of different-grain diameter, alleviate the pressure of subsequent processing device;
The rotary drum Microfilter be provided with, compared to common filter plant, can be removed organic and inorganic fragment and various types of plant plankton, algae or fibre pulp etc., can alleviate the pressure of subsequent reactions system from water;
The sewage entered in pond can be carried out pH regulator by the acid-alkali accommodation pond be provided with, by pH to suitable numerical value, so that implement next step decontamination handling procedure;
The flocculation sedimentation tank be provided with, by adding flocculation agent in flocculation zone, carrying out flocculation reaction to the impurity in sewage, then precipitating in settling region, can remove the BOD of SS, the 20%-30% of 40%-55% in sewage, reduce the load of follow-up structures;
The PVA gel pond be provided with, utilize the PVA biologic packing material of porous, sewage is processed, PVA is different from general biologic packing material, PVA bead not only surface can carry out enrichment to microorganism effectively, and its inside has countless small holes and also can carry out effective enrichment for a large amount of microorganisms, thus greatly increase biomass in PVA reactor, there is higher volumetric loading and good mud decrement effect, especially CODCr removal effect is more excellent, PVA gelled pill has good wetting ability simultaneously, compare other aerobic process mutually, PVA technique has toggle speed faster,
The settling tank be provided with, carries out solid-liquid separation to the sewage processed through PVA gel pond, and isolated clear liquid enters next step subsequent disposal, and isolated mud enters mud concentration basin and carries out subsequent reactions;
The membrane bioreactor be provided with, can process the clear liquid flowed out in settling tank, utilize characteristic can remove CODcr, TN and TP in sewage well, its removal rate can reach 70%, 50%, 60% respectively;
The second pond be provided with, precipitates again to the water through Membrane Bioreactor for Wastewater Treatment, carries out solid-liquid separation, and isolated clear liquid enters next step subsequent disposal, and isolated mud enters mud concentration basin and carries out subsequent reactions;
Be provided with EV fibre filter, to the filtration treatment that the clear liquid obtained after second pond carries out again, this filter tank is for common filter plant, this EV fibre filter adopts rotor type fibre filtrate, relative to other type filtrate, rotor type fibre filtrate has following characteristics: (1) had both had the characteristic of granule filter material, also has the dual characteristics of fiber filtering characteristic simultaneously; (2) can form very good filter bed, its voidage is uniformity in the horizontal plane, is from top to bottom the distribution of big up and small down graded on the vertical plane, can ensure that high-precision filtration and high filtering velocity are filtered simultaneously; (3) back flushing is thorough, water consumption is few: during back flushing, rotor drives fibre bundle to rotate, wave, and mutually impacts, accelerates the separation of the suspended particle that fibre bundle adheres to, and improves the cleaning speed of filtrate, saves backwash water amount; (4) after surface treatment, there is oleophobic property, be not easily wound around during operation, not easily tie a knot and resistance to back flushing.Therefore adopt EV fibre filter effectively can remove the SS of more than 80%, BOD5 and COD is also had to the clearance of 30%-50%;
Be provided with ultrasonic sterilization pond, make full use of hyperacoustic character, except materials such as CODCr, the NH3-N in decontaminated water, ultrasonic technique can well be combined with ultraviolet meanwhile, its sterilisation effect is far superior to be used alone disinfection by ultraviolet light, the removal effect of hardly degraded organic substance can be made more desirable, and meanwhile, the controllability of ultrasonic technology is strong, be easy to adjust operation state, to the change strong adaptability of the waste water quality water yield;
Disinfection by ultraviolet light process is carried out to water further in the disinfection by ultraviolet light pond be provided with, and UV energy makes the bacterium in water, the DNA internal structure of virus and other pathogen is destroyed, and loses activity and kills, and water quality is sterilized purification;
Be provided with water outlet lift pump room in the rear end in disinfection by ultraviolet light pond, the smooth and easy of the Chinese effluent after decontamination can be guaranteed;
The flocculation agent adopted, be the flocculation agent utilizing the mud reclaimed to prepare, namely fully can recycle mud, have and can obtain a kind of new flocculation agent, for common aluminium salt and Ferric Salt Flocculants, its flocculating effect is better.
The pitch of described coarse rack is 20-25mm, and the pitch of described fine fack is 8-10mm.
Be filled with spherical PVA gel particle in described PVA gel pond, the median size of described PVA gel particle is 5mm, and the volume of described PVA gel particle accounts for the 1/8-1/10 of PVA gel pond effective volume.Spherical gel particle, the contact area of itself and water is maximum, and can make the filler under same material, its treatment effect is best, and meanwhile, the gel particle volume of employing, both can ensure under this consumption that wastewater treatment efficiency had and be unlikely to waste material.
Be provided with the grid of aperture≤5mm in described PVA gel pond, the operating temperature in described PVA gel pond is 30-35 DEG C.At this temperature, the treatment effect of gelatinous material to sewage is best, and the grid be simultaneously provided with can prevent PVA bead to run off, to ensure the wastewater treatment efficiency of PVA bead.
To be the waste water that produces in subtraction paper making process reclaim gained to described subtraction paper mill sludge after molysite coagulating sedimentation, sludge dewatering are air-dry, wherein comprise by massfraction: water 5-10%, xylogen 40-45%, Mierocrystalline cellulose 8-12%, all the other compositions are the earth grains of sand and inorganic salt impurities.
Diversion trench and convection current gallery is provided with in described acid-alkali accommodation pond.Diversion trench is uniformly distributed water and makes it to form overflow and falls the form of exposing to the sun, and convection current gallery Shi Ge road waste water produces convection current, and former water mixing homogeneous, to ensure the best effect of subsequent disposal.
Described membrane bioreactor is bioreactor of dynamic membrane, and mould material adopts gac sponge, and aperture is 500um, thick 1cm; The arrangement mode of membrane module is laterally, longitudinally each 2 arrange, and often arranges independent water outlet.Gac sponge is as the film base material of bioreactor of dynamic membrane, the strainability of the absorption property of gac and sponge can be organically combined, gac sponge is the filtering material adopting polymer matrix material high-quality, absorption property stronger powdery photocatalytic active carbon appendix to be made on polyurethane foam carrier, its carbon content, at 30-50%, has good absorption property; Meanwhile, gac sponge has some characteristics of sponge, as higher porosity, good strainability etc., preventing membrane pollution ability is enhanced.
Beneficial effect: chemical engineering sewage advanced treatment system provided by the invention compared with prior art, has the following advantages:
Chemical engineering sewage advanced treatment system of the present invention, to carry out a biological disposal upon in (PVA gel pond process, Membrane Bioreactor for Wastewater Treatment) and physical treatment (filtration of EV fibre filter), chemical treatment (flocculation sedimentation tank process) combine, can realize carrying out advanced treatment to sewage, make wastewater treatment efficiency more superior, also reduce energy consumption simultaneously, through chemical engineering sewage advanced treatment system of the present invention, water quality can reach and higher than the emission standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A; The flocculation agent simultaneously utilizing the paper mill sludge of recovery to prepare in flocculation basin, has namely saved resource, has turn improved the effect of flocculation.
Accompanying drawing explanation
The structural representation of the chemical engineering sewage advanced treatment system that Fig. 1 provides for the embodiment of the present invention;
In figure: between 1-coarse rack, 2-lift pump room, 3-fine fack, 4-rotary drum Microfilter, 5-acid-alkali accommodation pond, 6-flocculation basin settling tank, 7-PVA gel pond, 8-settling tank, 9-membrane bioreactor, 10-second pond, 11-EV fibre filter, 12-ultrasonic sterilization pond, 13-disinfection by ultraviolet light pond, 14-water outlet lift pump room, 15-mud concentration basin, 16-sludge dewatering.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail; but illustrate that protection scope of the present invention is not limited to the concrete scope of the present embodiment simultaneously; based on the embodiment in the present invention; those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1
As shown in Figure 1:
A kind of chemical engineering sewage advanced treatment system, comprise coarse rack 1, lift pump room 2, fine fack 3, rotary drum Microfilter 4, acid-alkali accommodation pond 5, flocculation basin settling tank 6, PVA gel pond 7, settling tank 8, membrane bioreactor 9, second pond 10, EV fibre filter 11, ultrasonic sterilization pond 12, disinfection by ultraviolet light pond 13, water outlet lift pump room 14, said apparatus is connected successively by pipeline; Described flocculation basin settling tank 6, settling tank 8, second pond 10 are also connected to mud concentration basin 15 simultaneously, and the outlet of described mud concentration basin 15 to be connected with between sludge dewatering 16; The pitch of described coarse rack 1 is 20mm, and the pitch of described fine fack 3 is 8mm; Diversion trench and convection current gallery is provided with in described acid-alkali accommodation pond 5.
Be filled with spherical PVA gel particle in described PVA gel pond 7, the median size of described PVA gel particle is 5mm, and the volume of described PVA gel particle accounts for 1/8 of PVA gel pond 7 effective volume.
Be provided with the grid of aperture 5mm in described PVA gel pond 7, the operating temperature in described PVA gel pond 7 is 30 DEG C.
Described membrane bioreactor 9 is bioreactor of dynamic membrane, and mould material adopts gac sponge, and aperture is 500um, thick 1cm; The arrangement mode of membrane module is laterally, longitudinally each 2 arrange, and often arranges independent water outlet.
The flocculation agent that described flocculation sedimentation tank 6 adopts comprises following component by massfraction:
Alkali paper-making mud: 100 parts;
S-WAT or Sulfothiorine: 25 parts;
The chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-: 45 parts.
To be the waste water that produces in subtraction paper making process reclaim gained to described subtraction paper mill sludge after molysite coagulating sedimentation, sludge dewatering are air-dry, wherein comprise by massfraction: water 5%, xylogen 40%, Mierocrystalline cellulose 8%, all the other compositions are the earth grains of sand and inorganic salt impurities.
embodiment 2
As shown in Figure 1:
A kind of chemical engineering sewage advanced treatment system, comprise coarse rack 1, lift pump room 2, fine fack 3, rotary drum Microfilter 4, acid-alkali accommodation pond 5, flocculation basin settling tank 6, PVA gel pond 7, settling tank 8, membrane bioreactor 9, second pond 10, EV fibre filter 11, ultrasonic sterilization pond 12, disinfection by ultraviolet light pond 13, water outlet lift pump room 14, said apparatus is connected successively by pipeline; Described flocculation basin settling tank 6, settling tank 8, second pond 10 are also connected to mud concentration basin 15 simultaneously, and the outlet of described mud concentration basin 15 to be connected with between sludge dewatering 16; The pitch of described coarse rack 1 is 22mm, and the pitch of described fine fack 3 is 9mm; Diversion trench and convection current gallery is provided with in described acid-alkali accommodation pond 5.
Be filled with spherical PVA gel particle in described PVA gel pond 7, the median size of described PVA gel particle is 5mm, and the volume of described PVA gel particle accounts for 1/9 of PVA gel pond 7 effective volume.
Be provided with the grid of aperture 4mm in described PVA gel pond 7, the operating temperature in described PVA gel pond 7 is 33 DEG C.
Described membrane bioreactor 9 is bioreactor of dynamic membrane, and mould material adopts gac sponge, and aperture is 500um, thick 1cm; The arrangement mode of membrane module is laterally, longitudinally each 2 arrange, and often arranges independent water outlet.
The flocculation agent that described flocculation sedimentation tank 6 adopts comprises following component by massfraction:
Alkali paper-making mud: 100 parts;
S-WAT or Sulfothiorine: 28 parts;
The chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-: 50 parts.
To be the waste water that produces in subtraction paper making process reclaim gained to described subtraction paper mill sludge after molysite coagulating sedimentation, sludge dewatering are air-dry, wherein comprise by massfraction: water 8%, xylogen 42%, Mierocrystalline cellulose 10%, all the other compositions are the earth grains of sand and inorganic salt impurities.
embodiment 3
As shown in Figure 1:
A kind of chemical engineering sewage advanced treatment system, comprise coarse rack 1, lift pump room 2, fine fack 3, rotary drum Microfilter 4, acid-alkali accommodation pond 5, flocculation basin settling tank 6, PVA gel pond 7, settling tank 8, membrane bioreactor 9, second pond 10, EV fibre filter 11, ultrasonic sterilization pond 12, disinfection by ultraviolet light pond 13, water outlet lift pump room 14, said apparatus is connected successively by pipeline; Described flocculation basin settling tank 6, settling tank 8, second pond 10 are also connected to mud concentration basin 15 simultaneously, and the outlet of described mud concentration basin 15 to be connected with between sludge dewatering 16; The pitch of described coarse rack 1 is 25mm, and the pitch of described fine fack 3 is 10mm; Diversion trench and convection current gallery is provided with in described acid-alkali accommodation pond 5.
Be filled with spherical PVA gel particle in described PVA gel pond 7, the median size of described PVA gel particle is 5mm, and the volume of described PVA gel particle accounts for 1/10 of PVA gel pond 7 effective volume.
Be provided with the grid of aperture 3mm in described PVA gel pond 7, the operating temperature in described PVA gel pond 7 is 35 DEG C.
Described membrane bioreactor 9 is bioreactor of dynamic membrane, and mould material adopts gac sponge, and aperture is 500um, thick 1cm; The arrangement mode of membrane module is laterally, longitudinally each 2 arrange, and often arranges independent water outlet.
The flocculation agent that described flocculation sedimentation tank 6 adopts comprises following component by massfraction:
Alkali paper-making mud: 100 parts;
S-WAT or Sulfothiorine: 30 parts;
The chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-: 55 parts.
To be the waste water that produces in subtraction paper making process reclaim gained to described subtraction paper mill sludge after molysite coagulating sedimentation, sludge dewatering are air-dry, wherein comprise by massfraction: water 10%, xylogen 45%, Mierocrystalline cellulose 12%, all the other compositions are the earth grains of sand and inorganic salt impurities.
The flocculation agent its preparation method adopted in above-described embodiment is as follows:
The alkaline paper-making mud reclaimed is pulverized, then be added to the water and be uniformly mixed, the mass ratio of water-bath mud is 10:1, then in mixed solution, 10%NaOH solution is dripped, until the pH value of solution is stabilized in about 11.5, at this moment the xylogen contained in solution and Mierocrystalline cellulose dissolve all completely, then under 90 DEG C of condition of water bath heating, add S-WAT (Sulfothiorine also can), Keep agitation 2h, then at 70 DEG C of temperature, add the chloro-2-hydroxypropyl-trimethyl ammonium chloride (CHPTMA of quantitative 3-, component content 66%, adopt commercially available product), reaction 5h, precipitation is had to generate, solid-liquid separation, the solid phase prod obtained is required flocculation agent.
Chemical engineering sewage advanced treatment system of the present invention, its specific works operational process is as follows:
Illustrate, utilize the pharmacy sewage of a kind of pharmaceutical factory of Sewage treatment systems process of the present invention, the pH value of its sewage is about 4-5, CODcr content wherein up to 4000mg/L, BOD5 up to 4500mg/L, SS up to 400mg/L.
The sewage of discharge is first through coarse rack 1, and the coarse rack dirt remover be provided with in coarse rack 1 can remove the suspended substance or floating matter that in decontaminated water, particle diameter is larger, then sewage is once promoted by lift pump room 2, and to realize the run by gravity of subsequent treatment process, lift pump room 2 can be provided with 4 lifting water pumps (3 is standby with), sewage after promoting removes through fine fack 3 suspended substance or floating matter that wherein particle is less further, then sewage enters rotary drum Microfilter 4, can also cross and filter to remove some organic substances while that rotary drum Microfilter 4 can making some the inorganic particle impurity in sewage carry out filtration, sewage after above-mentioned preliminary treatment is adjusted to suitable potential of hydrogen through acid-alkali accommodation pond 5 again, so that follow-up biological treatment, due to follow-up flocculation reaction and PVA gel reaction, all need under the condition of alkalescence, therefore, sodium carbonate can be added in this step or pH value is adjusted to about 10 by sodium bicarbonate, the potential of hydrogen mixed after adjustment is suitable for waste water and enters flocculation sedimentation tank 6 carry out flocculation reaction under the effect of flocculation agent, generate insoluble SS and gel-like foreign matters particle flocculation, heavy flocs unit first precipitates in settling region, then the flocs unit that proportion is little adheres in air flotation zone and micro-bubble and floats, by air flotation pool dregs scraper, the collection of air supporting body refuse is transported to mud concentration basin 15, this step adds the amount of flocculation agent at about 300ml/L, flocculation reaction is to remove impurity, very good to the treatment effect of the CODcr in sewage in this step, the CODcr of 70-80% can be removed, BOD5 and SS, then sewage enters into PVA(polyvinyl alcohol) gel pond 7 processes, PVA is a kind of novel porous filler, due to its unique texture, carrier defines aerobic by surface to inside, anoxic and anaerobism microenvironment, provide the environment of microbe survival, oxygen transmits resistance to be reduced, reach the effect preventing sludge bulking, the volume of mud can be reduced, be convenient to isolated mud subsequent disposal in sewage disposal, can also process organic substance most of in sewage and microorganism simultaneously, especially better to the treatment effect of CODcr, minimumly can dispose the CODcr of 85%, the colourity of sewage can also be reduced simultaneously, the colourity of water quality doubly can be down to less than 40 times from 250-300, in PVA gel pond 7, except being added with PVA filler, also activated sludge is filled with, the activated sludge that this activated sludge adopts common sewage work to adopt, wherein the volume ratio of activated sludge and PVA bead preferably remains on about 3:1, PVA bead adopts commercially available PVA bead, the operating temperature in PVA gel pond 7 is at 30 DEG C, in order to make treatment effect best, pH value in reaction tank remains on about 10, water after process enters into settling tank 8 and carries out solid-liquid separation, and isolated clear liquid enters into follow-up water treatment programs, and isolated mud then enters into mud concentration basin 15 and carries out follow-up sludge treatment, from settling tank 8, isolated clear liquid enters into membrane bioreactor 9, by the mould material in reactor, water is processed, in treating processes, in reactor, every day closes water inlet and water outlet every 8h, open two Fans simultaneously and carry out back flushing 30-45min, in this step, fine to the removal effect of CODcr, TN, TP, the NH3-N in sewage, clearance reaches 70%, 50%, 60%, 90% respectively, water after membrane bioreactor 9 processes enters into second pond 10 and carries out solid-liquid separation, and isolated clear liquid enters into follow-up water treatment programs, and isolated mud then enters into mud concentration basin 15 and carries out follow-up sludge treatment, from second pond 10, isolated clear liquid enters in EV fibre filter 11 and carries out filtration treatment, back flushing pump house is also provided with in this EV fibre filter 11, EV fibre filter 11 is as a kind of Novel filter, have good filtration effect, filtration cycle length, stable water outlet, filtering velocity be high, take up an area the advantages such as little, the back flushing water yield is few, operational management is convenient, except the impurity such as SS, CODcr, BOD5 and NH3-N, TN residual in decontaminated water, comparatively clean clear water can be obtained, by ultrasonic sterilization pond 12, (ultrasonic power is approximately 80W to the clear water of discharging after process successively, reaction times about 30min) and disinfection by ultraviolet light pond 13 in carry out combined disinfection, except the material that the bacterium in anhydrating, virus and being difficult to removes, water quality is sterilized purification, clear water after purifying sterilizing eventually passes water outlet lift pump room 14 to carry out gravity again and promotes and then namely can discharge.
Through above-mentioned process, the impurity such as BOD5, CODCr, SS, TN, NH3-N, TP in sewage can effectively be removed.
In the process of water treatment, in flocculation basin settling tank 6, settling tank 8, second pond 10, isolated mud all concentrates on mud concentration basin 15 after gravity concentration, to enter between sludge dewatering 16 by mud lift pump again to be dewatered by belt filter press, the mud after dehydration can transport outward landfill stabilization.
Through chemical engineering sewage advanced treatment system of the present invention, its water quality of discharging is carried out detection according to " urban wastewater treatment firm pollutant emission index " (GB18918-2002) one-level A standard and is performed, and the water quality detection result of its water outlet is as shown in the table:
Table 1: effluent quality
Visible by upper table, by the sewage after chemical engineering sewage advanced treatment system of the present invention process, (GB18918-2002) one-level A standard that its water-quality guideline can reach completely " urban wastewater treatment firm pollutant emission index ", therefore chemical engineering sewage advanced treatment system of the present invention is a kind of effective advanced sewage treatment system.
Meanwhile, the present invention is when flocculating, and the flocculation agent adopting the paper mill sludge reclaimed to be prepared from carries out flocculation treatment.Coagulation is pretreatment process conventional in sewage treatment process.Although Chang Zuowei pre-treatment link, the use of coagulation process and coagulating agent/flocculation agent not only can affect effluent quality, can also affect energy consumption, cost of drugs and working cost.Coagulating agent conventional is at present aluminium salt and molysite, as polymerize aluminum chloride, Tai-Ace S 150 and iron trichloride.For organic floculant, adopt inorganic aluminium salt and Ferric Salt Flocculants, usage quantity is many, and can affect the water quality of process.Paper mill sludge is the product of sewage disposal in paper-making process, and output is large, complicated component, is the important trade waste of a class.At present, to its mode processing disposal mainly based on landfill, only have part to be fully utilized, not only waste a large amount of land resources, but also can secondary pollution be produced.Containing a large amount of unemployed xylogen in paper mill sludge, therefore can to lignin recovery to utilize.
The present invention has then recycled paper mill sludge; and saved cost; the effect of its flocculating effect of flocculation agent produced and removing impurity is compared to common flocculation agent; better; be achieve many things at one stroke; namely protect environment, again save cost, meet the policy of current national green energy-saving and emission-reduction.
Present invention uses membrane bioreactor simultaneously, especially employ and adopt gac sponge to be the bioreactor of dynamic membrane of mould material, , this reactor crosses the filter effect that the bio-dynamic membrane formed in active sludge filtration process realizes being similar to microfiltration membrane, this technology has capital construction and working cost is low, the advantages such as fouling membrane is easy to control, mould material has reproducibility, membrane flux can be made to recover more than 90% by hydrodynamic cleaning, the mould material adopted is for other mould material, because organism enrichment can be concentrated in the surface and around of gac sponge substrate by the huge surface area of gac and adsorption, Metabolic activity for microorganism has built good microenvironment, accelerate organic degradation process, and, enzyme can enter in the micropore of gac sponge, by the organic matter degradation of absorption, and the adsorption potential vacated can adsorb organic compound again, so just achieve the regeneration of gac simultaneously, whole system is just run under this synergy is heavily adsorbed in absorption degradation regeneration, final raising effluent quality.The removal advantage of bioreactor of dynamic membrane to TN mainly has benefited from the denitrification space that gac sponge inside is formed.This processing mode, for common precipitation, filtration treatment, effect is fine.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its objective is to allow and is familiar with these those skilled in the art and can understands content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalents done by spirit of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (7)
1. a chemical engineering sewage advanced treatment system, it is characterized in that: comprise coarse rack (1), lift pump room (2), fine fack (3), rotary drum Microfilter (4), acid-alkali accommodation pond (5), flocculation basin settling tank (6), PVA gel pond (7), settling tank (8), membrane bioreactor (9), second pond (10), EV fibre filter (11), ultrasonic sterilization pond (12), disinfection by ultraviolet light pond (13), water outlet lift pump room (14), said apparatus is connected successively by pipeline; Described flocculation basin settling tank (6), settling tank (8), second pond (10) are also connected to mud concentration basin (15) simultaneously, and the outlet of described mud concentration basin (15) is connected with (16) between sludge dewatering;
The flocculation agent that described flocculation basin settling tank (6) adopts comprises following component by massfraction:
Alkali paper-making mud: 100 parts;
S-WAT or Sulfothiorine: 25-30 part;
The chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-: 45-55 part.
2. chemical engineering sewage advanced treatment system according to claim 1, is characterized in that: the pitch of described coarse rack (1) is 20-25mm, and the pitch of described fine fack (3) is 8-10mm.
3. chemical engineering sewage advanced treatment system according to claim 1, it is characterized in that: in described PVA gel pond (7), be filled with spherical PVA gel particle, the median size of described PVA gel particle is 5mm, and the volume of described PVA gel particle accounts for the 1/8-1/10 of PVA gel pond (7) effective volume.
4. chemical engineering sewage advanced treatment system according to claim 3, is characterized in that: the grid being provided with aperture≤5mm in described PVA gel pond (7), and the operating temperature of described PVA gel pond (7) is 30-35 DEG C.
5. chemical engineering sewage advanced treatment system according to claim 1, it is characterized in that: to be the waste water that produces in subtraction paper making process reclaim gained to described subtraction paper mill sludge after molysite coagulating sedimentation, sludge dewatering are air-dry, wherein comprise by massfraction: water 5-10%, xylogen 40-45%, Mierocrystalline cellulose 8-12%, all the other compositions are the earth grains of sand and inorganic salt impurities.
6. chemical engineering sewage advanced treatment system according to claim 1, is characterized in that: be provided with diversion trench and convection current gallery in described acid-alkali accommodation pond (5).
7. chemical engineering sewage advanced treatment system according to claim 1, is characterized in that: described membrane bioreactor (9) is bioreactor of dynamic membrane, and mould material adopts gac sponge, and aperture is 500um, thick 1cm; The arrangement mode of membrane module is laterally, longitudinally each 2 arrange, and often arranges independent water outlet.
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| CN110294563A (en) * | 2018-03-21 | 2019-10-01 | 南京瑞迪建设科技有限公司 | A kind of compound eddy current air-float combination PVA carrier solidification microflora |
| CN110156256A (en) * | 2019-05-14 | 2019-08-23 | 河北华强科技开发有限公司 | A kind of glass fibre reinforced plastic waste comprehensive processing technique |
| CN111170591A (en) * | 2020-03-03 | 2020-05-19 | 安徽绿衡环保科技有限公司 | Complete device for solving blockage and hardening of biological filter and matched system thereof and treatment process thereof |
| CN112362586A (en) * | 2020-09-18 | 2021-02-12 | 西安工程大学 | Activated sludge metabolic state light deflection detection method |
| CN115093084A (en) * | 2022-08-05 | 2022-09-23 | 四川省生态环境科学研究院 | Multipoint and multi-tank synchronous electrochemical phosphorus removal system and phosphorus removal method thereof |
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