CN105712575A - Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms - Google Patents

Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms Download PDF

Info

Publication number
CN105712575A
CN105712575A CN201610072082.XA CN201610072082A CN105712575A CN 105712575 A CN105712575 A CN 105712575A CN 201610072082 A CN201610072082 A CN 201610072082A CN 105712575 A CN105712575 A CN 105712575A
Authority
CN
China
Prior art keywords
pond
sewage
sludge
water
immobilized microorganism
Prior art date
Application number
CN201610072082.XA
Other languages
Chinese (zh)
Inventor
陈珍妮
Original Assignee
厦门南卡环境治理有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厦门南卡环境治理有限公司 filed Critical 厦门南卡环境治理有限公司
Priority to CN201610072082.XA priority Critical patent/CN105712575A/en
Publication of CN105712575A publication Critical patent/CN105712575A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • C02F11/04Anaerobic treatment; Production of methane by such processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultra-violet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/50Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/20Sludge processing

Abstract

The invention discloses a method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms.The method comprises the steps that sewage is filtered through a grid, and solid precipitation particle removing treatment is conducted on filtered water of the sewage; the sewage subjected to solid precipitation particle removing treatment enters a treating pond, a repeated contact reaction is continuously conducted on the sewage and biocarriers in an immobilized microorganism reaction tank, and the sewage is purified; effluent suspended matter in the treating pond is filtered and removed, and filtered water and wet sludge are obtained; the filter water enters a disinfection tank, pathogenic bacteria and viruses in the filtered water are removed, and producing water subjected to disinfection can be directly discharged to the earth surface and serve as industrial recovered water or irrigation water; the wet sludge is conveyed into a sludge stabilization pond through a sludge pump for aerobic digestion, anaerobic digestion and mechanical stabilizing treatment; the stabilized liquid sludge serves as fertilizer or is subjected to dehydration drying treatment.Accordingly, the mixed liquor suspended solid dosage is greatly reduced, sludge reduction is achieved, and the allocation cost and operation cost of a sludge treatment device are reduced.

Description

The method that active sludge intermixture suspended solid processes waste water is substituted with immobilized microorganism
Technical field
The present invention relates to sewage treatment area technology, refer in particular to a kind of method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism.
Background technology
From 1970, activated sludge process and various forms of biomembrance process become the standard process flows of sewage disposal, its technological process is made up of a series of Aerobic Ponds, anoxic pond, packed tower, to process organic pollution, mainly include BOD on the 5th, COD, nitrogen-containing pollutant, organic nitrogen, inorganic nitrite, nitrate and total phosphorus, wherein, total phosphorus adopts biological phosphate-eliminating, dephosphorization bacterial is discharged after absorbing a large amount of phosphorus in form of a sludge, and total phosphorus is processed;The end of technological process is typically provided sterilization process unit, to eliminate pathogenic bacterium in water outlet and virus.
Activated sludge process or biomembrane water outlet can reach " the secondary effluent standard " of United States of America the United Nations, it is possible in line earth's surface, can as industrial reuse water or irrigation water;The core of activated sludge process is " activated sludge ", and " activated sludge " that process pond needs to maintain finite concentration, and activated sludge is containing various strains, also referred to as mixed liquor suspended solid, MLSS or biomembrane;It is milligrams per liter (mg/L) that mixed liquor suspended solid, MLSS weight in wet base measures unit, and it is pound that dry weight measures unit;Biomembranous measurement unit is thickness (mm);Mixed liquor suspended solid, MLSS precipitates at sedimentation tank, and rear portion is back to process pond, and a part is discharged as Waste Activated Sludge.The mixed liquor suspended solid, MLSS that preliminary sedimentation tank calcellation is discharged is called waste solid;Waste Activated Sludge and waste solid growing amount are not fixed, but usually often drop 1kg5 day BOD (dry weight), produce 0.5-0.8kg Waste Activated Sludge and waste solid.
The microorganism treatment of sewage is of a great variety, here just take the maximum Activated Sludge Process flow process technology as a setting of application and introduce that (in activated sludge process, after going out water precipitation, the mixed genetic-neural network separated from water outlet is 1, between 500-5,000mg/L;Biomembrance process, the mixed liquid concentration separated from water outlet is then 5,000-10, between 000mg/L):
Activated Sludge Process unit includes but not limited to successively: (1) inlet pumping station;(2) coarse rack: remove the diameter solid more than 25mm;(3) fine fack: remove the diameter solid more than 6-3mm;(4) setting pot: the precipitation grains of sand, heavier solid;(5) preliminary sedimentation tank (optional): remove settleable solids further;(6) process pond, or be full Aerobic Pond, or be made up of Aeration tank, anaerobic pond mixing, including multi-form backflow;(7) final deposition pool (or membrane filtration pond or oxygen sand filter): by precipitating or filtering, removes the mixed liquor in water outlet and suspends solid;(8) sterilization pool: before discharge, eliminates the pathogen in water outlet or virus;
Auxiliary process unit includes: (9) dredge pump: for removing the waste solid of Waste Activated Sludge or preliminary sedimentation tank;(10) nutrient adds pump: be usually used in Industrial Wastewater Treatment, and the content of nitrogen and phosphorous of industrial wastewater is typically not enough to support microbial growth breeding;(11) stabilizing treatment of Waste Activated Sludge: stabilisation mode includes anaerobic digestion, aerobic sigestion or mechanically stable;(12) Waste Activated Sludge and waste solid processed: by weight dehydration to original 18%-25%, after be transported to refuse landfill;(13) Waste Activated Sludge and waste solid stabilizing treatment land used, moisture percentage in sewage sludge is at 2%-4%;
The very crucial operational factor of activated sludge process is to process the mixed genetic-neural network in pond, and concentration is too low, and mixed liquor suspended solid, MLSS can floating, from final deposition pool spilling;Concentration is too high, and hydraulic detention time can extend, and effluent quality can be influenced by impact;And, the disposal costs of waste sludge activated sludge and waste solid is higher, generally can account for the 30%-40% of cost of investment and operating cost.Activated sludge process has a variety of application form, and according to the difference that water quality, application form, water outlet require, the hydraulic detention time in Wastewater Treated by Activated Sludge Process pond is between 6 hours to 3 days.
Foregoing active sludge relies on microbial growth breeding in sewage, and take on a certain scale flora, by flora ingesting to pollutant, completes dirty water purification.If but sewage is poison sewage, or containing toxic pollutant, microbial growth process can be interfered;Noxious substance in sewage includes but not limited to: soluble solid that a. is too high or salinity (> 5,000mg/L);B. petroleum hydrocarbon;C. Hydrocarbon;D. volatility and semi-volatile compounds;E. industrial wastewater component;F. the chemical agent that the woodworking mill such as wood pomegranate oil or pentachlorophenol uses.
Accordingly, it would be desirable to work out a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism, it is greatly reduced mixed liquor suspended solid, MLSS consumption, realize mud decrement, thus the deployment cost of low sludge treatment equipment and operating cost, it is adaptable to process the poisonous and harmful substance in the soluble solid concentration sewage higher than 40000mg/L and sewage.
For achieving the above object, the present invention adopts such as purgation technical scheme:
A kind of method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism, includes following processing step
(1) sewage is after grid filtration, then its drainage is removed precipitation solid particle process;
(2) the sewage entrance after removing precipitation solid particle and processing processes in pond, it processes immersion in pond and is provided with immobilization immobilized microorganism retort, it is equiped with microbe carrier in immobilized microorganism retort, process pond sewage is repeatedly passed through in immobilized microorganism retort by internal circulation pump and then flows into process pond, sewage by with the continuous haptoreaction of bio-carrier in immobilized microorganism retort, sewage is purified;
(3) process pond is gone out aqueous suspension to be filtered removing, it is thus achieved that drainage and wet mud;
(4) drainage after step (3) enters sterilization pool, and to remove pathogen in this drainage and virus, the product water after sterilized can directly arrange earth's surface, as industrial reuse water or irrigation water;
Wet mud after step (3) is delivered to sludge stabilization pond by sludge pump, and the precipitation solid particle removed in abovementioned steps (1) is also delivered to sludge stabilization pond;Wet mud and precipitation solid particle one are same as in sludge stabilization pond and carry out aerobic sigestion, anaerobic digestion and mechanically stable process;Liquid sludge after stable is used as fertilizer, or makes processed further, and its dry mud is transported to refuse landfill application, and dehydration gained sewage backflow is delivered to arbitrary process procedure before processing pond or processing pond.
As a kind of preferred version, in described step (1), remove precipitation solid particle by arranging preliminary sedimentation tank, or water inflow filter is set on the inlet channel processing pond to filter removal precipitation solid particle.
As a kind of preferred version, it is provided with setting pot before described preliminary sedimentation tank or water inflow filter, so that the sewage after grid filtration is carried out desanding process.
As a kind of preferred version, described grid filtration includes coarse rack filtration successively from water inlet direction and fine fack filters two steps.
As a kind of preferred version, in described step (3), by filter membrane technique unit, process pond is gone out aqueous suspension to be filtered removing, its filter membrane technique unit includes sludge concentration tank and filter membrane equipment, process pond water outlet and be delivered in sludge concentration tank, the top mixed liquor of sludge concentration tank enters filter membrane equipment and is filtered processing, and the drainage of filter membrane equipment enters sterilization pool, and the solid that filter membrane equipment intercepts is recycled in sludge concentration tank.
As a kind of preferred version, in described step (3), by intermittent aerating sand bed, process pond is gone out aqueous suspension to be filtered removing, intermittent aerating sand bed includes sandstone layer, rinses rock layers, it is covered with drain pipe bottom intermittent aerating sand bed, process pond water outlet from intermittent aerating sand bed surface seep, go out through bottom discharge pipe flow after;According to water outlet requirement, intermittent aerating sand bed can select aeration, intermittent aerating or not aeration.
As a kind of preferred version, being formed with containing cavity in described immobilized microorganism retort, this containing cavity upper end open, every being provided with mesh sheet in this containing cavity, containing cavity is separated to form the loading area being positioned on the upside of mesh sheet and is positioned at the inhalant region on the downside of mesh sheet by mesh sheet;This inhalant region is connected to sewage water inlet pipe, and sewage water inlet pipe is communicated in the inhalant region of internal circulation pump water outlet side and immobilized microorganism retort;This loading area is loaded successively from bottom to top and is formed with ballast layer and microbial carrier layer, and this ballast layer includes some ballast granules, and this microbial carrier layer includes some aforementioned micro organism carriers, this loading area upper end open;Process the sewage in pond and flow through sewage water inlet pipe, inhalant region, ballast layer, microbial carrier layer through internal circulation pump successively, then flow in process pond by loading area upper end open, such circularly purifying sewage.
As a kind of preferred version, described immobilized microorganism retort includes base and upper end charging cavity, and between its base and upper end charging cavity, detachable-type sealed connects.
The present invention compared with prior art has clear advantage and beneficial effect, specifically, as shown from the above technical solution, it is greatly reduced mixed liquor suspended solid, MLSS consumption, realize mud decrement, thus reducing deployment cost and the operating cost of sludge treatment equipment, and, adopt the sewage treatment process of the present invention, pollution components or chemical composition that traditional waste water treatment process can not be removed can be removed, it is except suitable in general municipal sewage treatment, applies also for process high-concentration hardly-degradable trade effluent.
For more clearly setting forth architectural feature and effect of the present invention, below in conjunction with accompanying drawing, the present invention is described in detail with specific embodiment.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of embodiments of the present invention;
Fig. 2 is certain sewage treatment plant's urban wastewater treatment water sample detection report;
Fig. 3 is the waste water dam sample detection data analysis table of so-and-so monitoring station;
Fig. 4 is certain sewage treatment plant's urban wastewater treatment test effect tables of data.
Accompanying drawing identifier declaration:
1, sump 2, intake pump
3, coarse rack 4, fine fack
5, setting pot 6, preliminary sedimentation tank
7, pond 8, immobilized microorganism retort are processed
9, internal circulation pump 10, concentration basin
11, filter membrane equipment 12, sterilization pool
13, sludge pump 14, sludge stabilization pond
15, dehydration device.
Detailed description of the invention
Refer to shown in Fig. 1 to Fig. 4, that show the technological process of embodiments of the present invention and sewage disposal test effect etc.;It is immobilized microorganism retort " internal recycle " that this kind processes the core of method for waste water, it is permanently secured to inertia porous biological carrier by functional microorganism, bio-carrier puts into immobilized microorganism retort, immobilized microorganism retort immersion processes pond, process pond sewage repeatedly to be entered bottom immobilized microorganism retort by water pump, go out from immobilized microorganism retort top, thereby, by with the continuous haptoreaction of microbe carrier in immobilized microorganism retort, sewage is purified;Exactly, the mixed liquor suspended solid, MLSS functioned as in " activated sludge process " of immobilized microorganism retort;In the present embodiment, sewage processes mainly through sump 1, intake pump 2, coarse rack 3, fine fack 4, setting pot 5, preliminary sedimentation tank 6, process pond 7, sterilization pool 12, sludge stabilization pond 14 etc., to complete municipal sewage treatment, is specifically described as follows.
One, usual, the sewage entering sewage treatment plant first converges at sump 1, from sump 1 by sewage successively pump to coarse rack 3, fine fack 4, with the solid particle removed in sewage within the scope of certain diameter;Wherein, coarse rack 3 is generally used for the diameter solid particle more than 1.9cm in interception sewage, and the gap of coarse rack is usually 2.5cm, different sewage treatment plant, coarse rack gap or have difference, used by this technological process, coarse rack gap can be smaller, it is preferred to below 2.5cm;Fine fack 4 is generally used for the diameter solid particle more than 0.3cm in interception sewage, the gap of fine fack is typically less than 0.6-1.2cm, different sewage treatment plant, fine fack gap or have difference, used by this technological process, fine fack gap can be smaller, it is preferable that is designed as less than 0.3cm;Generally, fine fack 4 needs it is carried out in use for some time, it is possible to is designed as Manual-cleaning or periodically automatically cleans, and its cleaning way can be through completing fine fack 4 submerged fast lifting to clean.
Two, sewage is after grid filtration, then its drainage is removed precipitation solid particle process;In the present embodiment, at sewage after grid filtration, carry out desanding process through setting pot 5, preliminary sedimentation tank 6 successively;This setting pot 5 is mainly used in the rough sand in precipitation sewage and partial suspended granule, and to prevent rough sand entrance from processing pond 7 and piling up bottom pond 7 processing, setting pot 5 is optional technique unit, and setting pot 5 would generally be saved in the sewage treatment plant that scale is less;This preliminary sedimentation tank 6 generally can remove BODs on the 5th (the i.e. bioanalysis oxygen demand BOD of 5 days of the float of 40-50%, 20%-30%, also referred to as BOD5), preliminary sedimentation tank 6 is optional technique unit, it also can substitute with water inflow filter, water inflow filter is identical with preliminary sedimentation tank 6 role, contribute to removal precipitation solid particle, but water inflow filter floor space little a lot.
Three, the sewage entrance after removing precipitation solid particle and processing processes in pond 7, process immersion in pond 7 and be provided with immobilized microorganism retort 8, the quantity of immobilized microorganism retort is determined as the case may be, the pollutant index that immobilized microorganism retort tank processes also includes BOD on the 5th, COD, total suspended solid, ammonia nitrogen and total nitrogen, but, total phosphorus can not be carried out biodegradation by microbial reaction tank tank;(different in kind according to sewage, such as town sewage, industrial wastewater, oil field waste, percolate etc., selected different microorganism, after functional microorganism is selected, with regard to Permanent implantation microbe carrier to be equiped with microbe carrier in immobilized microorganism retort 8;Herein, preferential employing patent Microorganism incubation technology, functional microorganism is fixed in substrate (i.e. microbe carrier), the composition of substrate includes but not limited to kieselguhr, and being referred to the patent No. is substrate described in US4859594, US4775650;Herein, immobilized microorganism retort functions as the mixed liquor suspended solid, MLSS that in activated sludge process, germs collect is formed;Microbe carrier is porous inert graininess, and its density is at least 480kg/m3, and hardness is at least 12), microbe carrier thickness decision design (microbial reaction tank is cylindrical, and diameter is not specific, but generally between 15-92cm) between 0.3-1.2m;Processing pond 7 sewage by internal circulation pump 9(can be immersible pump, self priming pump or centrifugal pump etc.) repeatedly interior through then flowing into process pond 7 from immobilized microorganism retort 8, sewage by with in immobilized microorganism retort 8 bio-carrier repeatedly constantly haptoreaction (as decision design, described immobilized microorganism retort internal recycle speed is between 6cm/ second second-61cm/), sewage is purified.
In actual applications, immobilized microorganism retort 8 can be installed according to practical situation and is applied to process in pond 7, the number of applications of immobilized microorganism retort 8 and the volume etc. of single immobilized microorganism retort 8, it is possible to on-demand and determine (such as different and determine according to the factor such as concentration of wastewater, component composition);Herein, the structure of immobilized microorganism retort 8, building block etc. are not construed as limiting, only emphasize application principle and the effect of immobilized microorganism retort 8;Aeration is not had in immobilized microorganism retort 8, enter into the sewage in immobilized microorganism retort 8 and just contain enough dissolved oxygen, it is enough to make the dissolved oxygen concentration in immobilized microorganism retort 8 maintain more than 3mg/L, the continuous growth and breeding of functional microorganism that its microbe carrier produces, to last, quantity can far be more than in sewage original micro organism quantity, by " internal recycle ", (general immobilized microorganism retort internal recycle speed is between 6cm/ second second-61cm/ in microorganism, the immobilized microorganism retort internal recycle amount of 24 hours, as the case may be, it is smaller than processing pond sewage quantity, also greater than process pond sewage quantity 5 times), it is distributed in process pond 7, owing to microorganism is unicellular, (weight of single microbial is between 10-10-10-9mg for density and clear water similar density, general cfu is as the amount unit of microorganism, the length of microorganism is generally between 0.1-0.5 micron), processing bottom pond 7 thus without forming sludge settling, decrease sludge quantity.
The Main Function in this process pond 7 is the BODs on the 5th in removal sewage, COD and ammonia nitrogen, process pond 7 volume can design variation on demand, the general volume processing pond 7 is determined according to following factor: (1) concentration of wastewater, BOD on the 5th, COD, float, ammonia nitrogen concentration;(2) sewage type, different (3) Effluent criteria (4) the water outlet purposes of the intractability of different sewage: the poisonous component in (5) sewage such as in line earth's surface, industrial reuse water, agricultural irrigation.Processing pond can be one or more process pond composition, aeration mode can be bottom aeration or surface aeration, described process pond has aeration section, anoxia section, anaerobism section, wherein, the dissolved oxygen concentration of aeration section maintains more than 3mg/L, the dissolved oxygen of anoxia section (such as: anoxic pond or the anoxia section in Aerobic Pond) maintains below 0.5mg/L, and the dissolved oxygen of anaerobism section (such as: anaerobic pond or the anaerobism section in Aerobic Pond) maintains 0mg/L;Process pool volume and be 1/2-3 times of day output, or more;Process the microorganism concn in pond between 107-1010cfu/ml, process the consumption rate in pond at 50-300mg/L/h, process the concentration of suspension of pond water outlet between 25-150mg/l.
Four, process pond 7 is gone out aqueous suspension to be filtered removing, it is thus achieved that drainage and wet mud;Processing pond 7 mixed genetic-neural network between 25-100mg/L, it is far below processing pond 7 mixed genetic-neural network (being typically in 1,000-5, between 000mg/L) in traditional waste water treatment process flow process;
Process pond 7 is gone out the removal of aqueous suspension, it is possible to being filtered removing by filter membrane technique unit, filter membrane technique unit functions as final deposition pool;Filter membrane technique unit includes sludge concentration tank 10 and filter membrane equipment 11, process pond 7 water outlet and be delivered in sludge concentration tank 10, the top mixed liquor of sludge concentration tank 10 enters filter membrane equipment 11 and is filtered processing, the drainage of filter membrane equipment 11 enters sterilization pool 12, and the solid that filter membrane equipment 11 intercepts is recycled in sludge concentration tank 10;Filter membrane equipment 11 can adopt micro-filtration membrane or ultrafilter membrane, and the aperture range of choice of filter membrane, between 0.01-0.05 micron, will be intercepted more than the solid of membrane aperture, and membrane flux is usually at 0.4-0.6m3/m2/ hour;Filter membrane equipment 11 can be external mounted, and after being arranged on concentration basin 10, filter membrane equipment 11 can also select immersion filter membrane;
The hydraulic detention time (time required for namely processing certain volume sewage) of concentration basin 10 is at least 2 hours, and mixed genetic-neural network is 6,000-10, between 000mg/L;
The main task of concentration basin 10 is to remove COD in sewage, BOD on the 5th, ammonia nitrogen and total nitrogen further;The aeration mode of concentration basin 10 can be aeration plate aeration or surface aeration, and the aeration of concentration basin 10 is intermittent aerating, to be alternately produced aerobic zone and anoxic zone, during aerobic section, dissolved oxygen concentration, at 3-5mg/l, creates aerobic environment, carry out Nitrification, complete the ammonia nitrogen conversion to nitrate;Then create anaerobic environment, carry out Denitrification, complete the nitrate conversion to nitrogen, thus realizing total nitrogen degradation;Process the COD of pond 7 water outlet and the endogenous respiration of concentration basin 10 mixed liquor suspended solid, MLSS, having manufactured suitable oxygen consumption demand, when entering anoxic zone, mixed liquor suspended solid, MLSS is namely with COD for food, fighting for the oxygen of nitrate, namely this process is called Denitrification simultaneously;Concentration basin 10 sludge yield is often remove 1kgCOD(COD to refer to the oxygen demand that Organic substance changes into carbon dioxide and water), only produce 0.05-0.1kg dry weight Waste Activated Sludge;Supporting filter membrane technique, water outlet low mixed genetic-neural network in aforementioned processing pond 7 can extend concentration basin 10 sludge retention time (mud age), mud can extend to 15-30 days (and the mud of existing activated sludge process is approximately in 6-12 days age) age, even longer, mud is more long for age, ammonia nitrogen, total nitrogen degradation efficiency higher, clearance is up to 95%-99%, and water outlet concentration of suspension is on average at below 5mg/L.
By intermittent aerating sand bed, process pond 7 can also be gone out aqueous suspension to be filtered removing, intermittent aerating sand bed includes sandstone layer, rinses rock layers, it is covered with drain pipe bottom intermittent aerating sand bed, liner should be set bottom intermittent aerating sand bed, it is prevented that water leaks into underground;Process pond 7 water outlet from intermittent aerating sand bed surface seep, go out through bottom discharge pipe flow after;According to water outlet requirement, intermittent aerating sand bed can select aeration, intermittent aerating or not aeration;Some parameter decision designs of described intermittent aerating sand bed are: top sandstone layer 0.9m, bottom irrigation rock layers 0.6m, top sandstone layer is reserved above with space high for 1m, when process pond 7 goes out water pump to intermittent aerating sand bed, the high space of 0.6m can be accounted for, top sandstone layer uses specific aeration tube to carry out aeration, and specific aeration tube is embedded in the top sandstone layer position from top 7.6cm, and every meter of aeration tube is responsible for the aeration of 1.2 the carried water yields of sand bed;
Generally, intermittent aerating bottom row water pipe should equipped with valve, when intermittent aerating sand bed starts to intake, aeration is opened, and regulates drain pipe valve, it is prevented that current are too fast flows through intermittent aerating sand bed, water level should maintain at least 6 hours, the position of 0.6m above intermittent aerating sand bed top layer, when intermittent aerating sand bed top height of water level is 0, a new round filters and starts, and the dissolved oxygen concentration of top sandstone layer sewage maintains between 2-4mg/L;The task of intermittent aerating sand bed is the ammonia nitrogen degradation that the sand bed of top 15cm completes at least 30mg/L, it changes into nitrate, and corresponding below 15cm sand bed is anoxic zone, can remove BOD, COD on the 5th further;Denitrification is likely to and occurs in anoxic zone, completes the degraded to nitrate, it changes into nitrogen, outside effusion system, it is achieved total nitrogen degradation;Process the low mixed genetic-neural network of pond 7 water outlet and can reduce sand bed surface sludge removing frequency, at least the 1-3 even longer time just needs to remove 1 time, simultaneously, ammonia nitrogen, BOD, COD clearance on the 5th can respectively reach 80%, 98%, more than 90%, and its water outlet concentration of suspension is on average at below 10mg/L.
Five, entering sterilization pool 12 through filtration treatment gained drainage, to remove pathogen in this drainage and virus, the product water after sterilized can directly arrange earth's surface, as industrial reuse water or irrigation water;Its disinfection way generally has chlorination, disinfection by ultraviolet light etc., it is possible to select according to practical situation;
It is delivered to sludge stabilization pond 14 by sludge pump 13 through the wet mud of filtration treatment gained, sludge pump 13 is mainly used in concentration basin 10 spoil disposal, so that concentration basin 10 mud (MLSS) concentration is maintained at certain limit, with complete to BOD on the 5th, COD, float, ammonia nitrogen degraded, also ensure the properly functioning of filter membrane simultaneously;The precipitation solid particle removed in aforementioned preliminary sedimentation tank 6 is also delivered to sludge stabilization pond 14;Wet mud and precipitation solid particle one are same as in sludge stabilization pond 14 and carry out aerobic sigestion, anaerobic digestion and mechanically stable process;Liquid sludge (moisture content is between 96%-99%) after stable can as fertilizer for fertile soil, or make processed (through dehydration device 15 filter pressing) further, its dry mud is transported to refuse landfill application, and dehydration gained sewage backflow is delivered to arbitrary process procedure before processing pond 7 or processing pond 7;Generally, wet moisture percentage in sewage sludge reaches 97%-99%, and namely mud dry weight is usually the 1%-3% of mud weight in wet base;The moisture percentage in sewage sludge being transported to refuse landfill is approximately between 75%-82%.
As shown in Figures 2 to 4, which show the sewage treatment process of certain sewage treatment plant application present invention, carry out urban wastewater treatment test specimen detection data and analysis situation (supporting intermittent aerating sand bed scale: 24m3/ days, its water inlet for concentration of wastewater the highest time sampling), its ammonia nitrogen (NH3-N), BOD (BOD5), COD (COD) clearance on the 5th can respectively reach 87%, 98%, more than 95%, and wastewater treatment efficiency is substantially better than the sewage treatment process of conventional art.
To sum up, the sewage water treatment method of the present invention mainly has the advantage of following several respects:
One, mixed liquor suspended solid, MLSS consumption is greatly reduced, it is achieved mud decrement, thus reducing deployment cost and the operating cost of sludge treatment equipment;Generally, needing substantial amounts of mixed liquor suspended solid, MLSS with the BOD on the 5th of degrading, COD and ammonia nitrogen in the process pond of activated sludge process, mixed genetic-neural network need to maintain 1,000-5, between 000mg/L;And mixed genetic-neural network only needs to maintain between 25-100mg/L in the process pond of the present invention;
Two, processing the low mixed genetic-neural network of water outlet in pond and can extend concentration basin sludge retention time (i.e. mud age), mud can extend to 15-30 days age, even longer;Mud is more long for age, ammonia nitrogen, total nitrogen degradation efficiency higher, clearance is up to 95%-99%;
Three, the sewage water treatment method of the present invention is adopted, pollution components or chemical composition that traditional waste water treatment process can not be removed can be removed, it is except suitable in general municipal sewage treatment, applies also for and processes high-concentration hardly-degradable trade effluent (such as: for processing the poisonous and harmful substance etc. in the soluble solid concentration sewage higher than 40000mg/L and sewage).
The above, it it is only presently preferred embodiments of the present invention, not the technical scope of the present invention is imposed any restrictions, therefore every any trickle amendment, equivalent variations and modification above example made according to the technical spirit of the present invention, all still fall within the scope of technical solution of the present invention.

Claims (10)

1. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism, it is characterised in that: include following processing step
(1) sewage is after grid filtration, then its drainage is removed precipitation solid particle process;
(2) the sewage entrance after removing precipitation solid particle and processing processes in pond, it processes immersion in pond and is provided with immobilized microorganism retort, it is equiped with microbe carrier in immobilized microorganism retort, process pond sewage is repeatedly passed through in immobilized microorganism retort by internal circulation pump and then flows into process pond, sewage by with the continuous haptoreaction of bio-carrier in immobilized microorganism retort, sewage is purified;
(3) process pond is gone out aqueous suspension to be filtered removing, it is thus achieved that drainage and wet mud;
(4) drainage after step (3) enters sterilization pool, and to remove pathogen in this drainage and virus, the product water after sterilized can directly arrange earth's surface, as industrial reuse water or irrigation water;
Wet mud after step (3) is delivered to sludge stabilization pond by sludge pump, and the precipitation solid particle removed in abovementioned steps (1) is also delivered to sludge stabilization pond;Wet mud and precipitation solid particle one are same as in sludge stabilization pond and carry out aerobic sigestion, anaerobic digestion and mechanically stable process;Liquid sludge after stable is used as fertilizer, or makes processed further, and its dry mud is transported to refuse landfill application, and dehydration gained sewage backflow is delivered to arbitrary process procedure before processing pond or processing pond.
2. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterised in that: in step (2), process pond sewage constantly enters bottom immobilized microorganism retort, top goes out, and completes to purify.
3. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterised in that: in described immobilized microorganism retort, the microbe carrier thickness of installing is between 0.3-1.2m.
4. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterised in that: described immobilized microorganism retort internal recycle speed is between 6cm/ second second-61cm/.
5. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterized in that: described process pond has aeration section, anoxia section, anaerobism section, wherein, the dissolved oxygen concentration of aeration section maintains more than 3mg/L, the dissolved oxygen of anoxia section maintains below 0.5mg/L, and the dissolved oxygen of anaerobism section maintains 0mg/L.
6. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterized in that: in described step (1), remove precipitation solid particle by arranging preliminary sedimentation tank, or water inflow filter is set on the inlet channel processing pond to filter removal precipitation solid particle.
7. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 5, it is characterised in that: it is provided with setting pot before described preliminary sedimentation tank or water inflow filter, so that the sewage after grid filtration is carried out desanding process.
8. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterised in that: described grid filtration includes coarse rack successively and filters and fine fack two steps of filtration from water inlet direction.
9. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterized in that: in described step (3), by filter membrane technique unit, process pond is gone out aqueous suspension to be filtered removing, its filter membrane technique unit includes sludge concentration tank and filter membrane equipment, process pond water outlet and be delivered in sludge concentration tank, the top mixed liquor of sludge concentration tank enters filter membrane equipment and is filtered processing, the drainage of filter membrane equipment enters sterilization pool, and the solid that filter membrane equipment intercepts is recycled in sludge concentration tank.
10. the method substituting active sludge intermixture suspended solid process waste water with immobilized microorganism according to claim 1, it is characterized in that: in described step (3), by intermittent aerating sand bed, process pond is gone out aqueous suspension to be filtered removing, intermittent aerating sand bed includes sandstone layer, rinses rock layers, it is covered with drain pipe bottom intermittent aerating sand bed, process pond water outlet from intermittent aerating sand bed surface seep, go out through bottom discharge pipe flow after;According to water outlet requirement, intermittent aerating sand bed can select aeration, intermittent aerating or not aeration.
CN201610072082.XA 2016-02-02 2016-02-02 Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms CN105712575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610072082.XA CN105712575A (en) 2016-02-02 2016-02-02 Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610072082.XA CN105712575A (en) 2016-02-02 2016-02-02 Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms

Publications (1)

Publication Number Publication Date
CN105712575A true CN105712575A (en) 2016-06-29

Family

ID=56155542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610072082.XA CN105712575A (en) 2016-02-02 2016-02-02 Method for treating waste water by replacing activated sludge mixed liquor suspended solids with immobilized microorganisms

Country Status (1)

Country Link
CN (1) CN105712575A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3483126A1 (en) * 2017-11-09 2019-05-15 Huber SE Plant and method for the treatment of wastewater

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414957A1 (en) * 1989-09-28 1991-03-06 Joachim Dipl.-Ing. Tatura Hydrodynamic bioreactor with submersible chambers
JPH08164397A (en) * 1994-12-13 1996-06-25 Hikita Kogyo Kk Bioreactor
CN202576160U (en) * 2012-05-03 2012-12-05 波鹰(厦门)科技有限公司 Municipal sewage treatment and regeneration recycling device
CN103833188A (en) * 2014-03-24 2014-06-04 蒲晓斌 High-suspension easy-to-biochemically treated wastewater treatment method
CN204310864U (en) * 2014-12-01 2015-05-06 广西大学 The circulation pulling flow type immobilization bioreactor that the pool, a kind of lake water body in-situ is repaired
CN204737774U (en) * 2015-03-31 2015-11-04 北京三泰正方生物环境科技发展有限公司 Biological carrier of box with a net formula and immobilized microbe device of disposing of sewage
CN105271610A (en) * 2015-06-18 2016-01-27 北京建研环保设备有限公司 Comprehensive processing process of culturing farm cow dung waste water

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414957A1 (en) * 1989-09-28 1991-03-06 Joachim Dipl.-Ing. Tatura Hydrodynamic bioreactor with submersible chambers
JPH08164397A (en) * 1994-12-13 1996-06-25 Hikita Kogyo Kk Bioreactor
CN202576160U (en) * 2012-05-03 2012-12-05 波鹰(厦门)科技有限公司 Municipal sewage treatment and regeneration recycling device
CN103833188A (en) * 2014-03-24 2014-06-04 蒲晓斌 High-suspension easy-to-biochemically treated wastewater treatment method
CN204310864U (en) * 2014-12-01 2015-05-06 广西大学 The circulation pulling flow type immobilization bioreactor that the pool, a kind of lake water body in-situ is repaired
CN204737774U (en) * 2015-03-31 2015-11-04 北京三泰正方生物环境科技发展有限公司 Biological carrier of box with a net formula and immobilized microbe device of disposing of sewage
CN105271610A (en) * 2015-06-18 2016-01-27 北京建研环保设备有限公司 Comprehensive processing process of culturing farm cow dung waste water

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
王学刚等: "《水处理工程(下册)》", 31 January 2015 *
黄跃华: "《水处理技术》", 31 December 2013 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3483126A1 (en) * 2017-11-09 2019-05-15 Huber SE Plant and method for the treatment of wastewater

Similar Documents

Publication Publication Date Title
Davies et al. Intensified activated sludge process with submerged membrane microfiltration
CN105585220B (en) A kind of urban sewage treatment system and purification method
Visvanathan et al. Membrane separation bioreactors for wastewater treatment
Hasar et al. Stripping/flocculation/membrane bioreactor/reverse osmosis treatment of municipal landfill leachate
US7790032B2 (en) Waste treatment process
KR0175229B1 (en) Apparatus and method for waste water treatment using granular sludge
US4415450A (en) Method for treating wastewater using microorganisms and vascular aquatic plants
US8192626B2 (en) Wastewater chemical/biological treatment method for open water discharge
Wang et al. Degradation characteristics of secondary effluent of domestic wastewater by combined process of ozonation and biofiltration
CN102786183B (en) Method for processing garbage leachate
US7320752B2 (en) Integrated hydroponic and wetland wastewater treatment systems and associated methods
CN101891336B (en) System and method for leachate treatment in sanitary landfill
US6210578B1 (en) Residual water treatment microplant for small flows
US6811700B2 (en) Integrated hydroponic and fixed-film wastewater treatment systems and associated methods
Tawfik et al. Sewage treatment in a combined up-flow anaerobic sludge blanket (UASB)–down-flow hanging sponge (DHS) system
Rodríguez-Hernández et al. Comparison between a fixed bed hybrid membrane bioreactor and a conventional membrane bioreactor for municipal wastewater treatment: a pilot-scale study
EP2528869B1 (en) Method for reducing sludges produced by wastewater treatment facilities
CN100398470C (en) Infiltration method for treating garbage
KR20100098444A (en) Suspended media granular activated carbon membrane biological reactor system and process
Saeed et al. A comprehensive review on nutrients and organics removal from different wastewaters employing subsurface flow constructed wetlands
Hasan et al. Kinetic evaluation of simultaneous COD, ammonia and manganese removal from drinking water using a biological aerated filter system
CN101708935B (en) Method for treating container washing wastewater
CN103819049B (en) A kind of sewage water treatment method and system
Kornboonraksa et al. Application of chemical precipitation and membrane bioreactor hybrid process for piggery wastewater treatment
CN103112991B (en) Coking wastewater treatment system and coking wastewater treatment method

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160629

RJ01 Rejection of invention patent application after publication